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CAS-06_LAKE RILEY/RICE MARSH LAKE WATER QUALITY IMPROVEMENTNon -Scannable Item Item Description Folder Dumber - 2 Folder Nam LckKe RAeyiRiCeMo,rSh LK Job Number 2322q Box Number OOg0 Client: RILEY-PURGATORY-BLUFF CREEK WATERSHED DISTRICT Project Number: 23/27-E61 Date: Feb. 03, 2006 P \�' �ruratls co 4 00 rr West 77thnStreet Minneapolis, MN 55435 (952)832-2600 LAKE RILEY/RICE MARSH LAKE WATER QUALITY IMPROVEMENTS Chanhassen/Eden Prairie, Minnesota DAVID AND ANNE FLORENZANO 9470 LAKELAND TERRACE EDEN PRAIRIE, MINNESOTA 55347 r1S�. 957-S3;- V N N cc O L3 O 0 N m 0 I a I .a 3 I uN7 N LO w n N M N / c� f 12 DAKOTA IIE 6" Spruce N ��O EL=888e � \ EL=88 .6 e , ? �q EL 8898 9 N Ln L. 893. 81J1 DAKOTA LANE Q \C/TY OF CHANHASSEN ci EL=889.7 LEI EL=B8 EL=88JJ 9 . 8727 DAKOTA LANE 12" _ 8129 DAKOTA LANE - ,6\ Maples 2 Lrf- - t/1 EL=e _e874 2 f� rn-- 12" \� EL=80J.0 $µ Sm ^ Sw+ sN $g6S ER '� =88 .13 � " INTERCEPTOR SEWS -�+' EL Be ; ♦ EL=886 _ - -SAN CES 66 SA tK SAN s� S, SAN � Chainlink b� ♦ �6 g sw _Sm-SnX- Fence E �� $aX � $µ =88fi.2 11 XEL=883.5 S8X SO SAN � -�- EL=-8B7.3 N E. y� /••' ''{p� 883 - six...... 884SAN " M8846 v+L_Bg � � � _L=aB E- 1�-SMl gan SNf^-SNIP _^._.._.5 EL=BI E-Br'.9 I••• pp .--pp _..._. o8 p �� UUO �U - UV6 ELvBaJ.2 � U6 CL 8F :�-8�.0 � - � • • p E -aJ9.4 EL=879S EL= - ..- WETLAND DELINEATION DRAINAGE E =e79.3 EL=679, - - EASEMENT 8 0 = 0.1� EL 8 �. - WOII ea a E 7J EL 878 EL=87e., 0� _aJ7 9 Bitumlo 84 I P /•�x I , 9 us Pa = 1^ .. - _. .X - L=SBO.J - +... - X �a 6.0 .... - 3 ..877 �. �xi.;.. ;hov =asea_ =ea2.3 8cQ]^�/ a • -.._� .9 `._.l =680.5 E =891. L-881.3C EL 8� ••• 1.B L EL-BJ8.8 xEy�6A.5 _ _.•'. EL=B� A .1- ft azB,9 xEL= 80 ° °free 681.2 xEL=874.3 \"'\.. EL= T Plays, ELL=6B0.9-eL-881. •..�• n^..% / . EL-ewa _-_ - X[ it�L=BR�L=87 J LL.L1 eJ a 3 xEL-e7fiJ �.•, xEL=878.5 • xEL=B]7.0 �••. �... 77 a7� _ J. EL_ � �• •-•.• ,•-�L�8J6fiX•-•L{�iE�p,-,�. i•v' LEL=0J66 pp xEL=8J6.5 xE 6 V7 1 ELV B76 e x _- ` 11 xEL L76,5 xEL=B]8.1.' • xEL=BJZ -.. XE�6JSJ 8 � XEL-576.5 _ . I � xEL=876.T�, • '; _ 810 Lr=e7a.1 xEL=878.2 L-BJ). xEL=877.4 877 a '�. � xEV=Qi4� 1-1 $1 • + +4 14._.. xELv877.4 da "` "• XEL=876,& - •XEL=574.4 _BJ4.5 x W S. 03 //14/2005) -� :BJ9.4 . 'xEL=876.8 ; EL 878.8...._ - ... 87 EL- 6.79' ' • xEL=8J6.4 . ' • __`, - .___--_..._�_ 5 EL-379.2 xEL-876.1 L_ 6 870 E _e76 e • • \ 871 EL=eJ6.9 xEL=a77.7 - _ • xEL=876. 872 "--__. - g� .. •-XC -BJS9 ', L-BJ7.0 XEL`8]6., �� vB]8.9X 8219 _ 1 873 EL=aA 5 • '- _ 8 xEL 9>7.5 xEL=a]BY XEL=8J6.5 '� 874 xEL=5970 - xEL=877.9 xEL=07fi.6 u.., xEL=S]6.9 EL= 6 '• xEL=876.5 • \ • - • • • -„ 875 876 xEL-BN 4 _ %EL-8A.1 L=877J L=876J 877 -...� ..� 877, EL-B".' ' \ , _ ;EL=878) XEL =6 .�\. • .:: 876 EL=B]5.6 EL-87]. •\• =8 EL-ve.6 77.0 CITY OF CHANHASSEN •\ xEL=876.5 0j �� 2 - = fig` EL=BB6.5 � Wood Fence _ N O \ EL 86.6 f I 0 Z 30 60 EL = J i- - 1.1 EL=880.5 EL-882.0 I I I Sa itaWy MH SCALE IN FEET L,7886.89 � ') LV xEL=881.3 xEL=881.0 / xEL=880.5 / y,X _ xri= ,a 0o Co �_ SAS J•EL=880.6 sµ-SNL_ ° 9 I CL=882.1 882.4 EL=881.0 EL=b},JumiOUS Path SSµ/ Sw = 857 EL=88,.9 v„�5 EL=882.0 EL=BPL1 TP al #10�SNI_ _ eE5.2 SaN_88i_MCSENSQ) �N /SMA r=8(yNEL=880.6 L5� EL-880.72 xE 885. EL=881.6 \, � xEL=Dae.6 E BBO.J xEL=8805 CITY OF CHANHASSEN - ••• •� -B EL-680,4 BBC) xEL=8J9.9 _ 1 \ L ••\ 8 xEL=879.B \ E 8800 FOREBAY t.4 @=879 9 - L BB 2 I xEL-879.3 cj, 7 i 4- xEL=6794 x.L=9'96 t ! o I -- _-A_ 7 7 •6 `} I WETLAND DELINEATION 879 = �7 7,E- 11 (7 I xEL=979.2 L=679.G xEL=676.8 IxEL=B]B.e TP Nail 1 DRAINAGE EASEMENT RICE MARSH LAKE PARK xEL-878.3 Ex B C xEL=878.3 L 7 2 L 77.9 \ •` 878 x _ xEL-877.a Fencepost 77 :\ Am xEL=1177e - xEL=877.7 XEL-87 0 xEL-877J xEL-8J7.5 877 L-575.7 I XEL-876.5 I XEL=876.6 1 NWL 876.0 :1 1 I I 1 i i� i� 877 STAGE STORAGE VOLUMES ELEVATIONS ACRES 876 2.69 875 2.39 874 2.24 873 2.09 872 1.94 871 1.69 870 1.55 FIRST RE aC-siG of 14. L TAKEs ALL THE Imes D.#J WES T SIDE OF aiii'l I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORT WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE MINNESOTA. UNDER THE STATE ENGINEER LAWS PROFESSIONAL SIGNATURE PRINTED NAME CLIENT Project Office: BARR ENGINEERING CO. BARR MINN WEST , MIN STREET MINNEAPOLIS, MN. 55435-4803 Corporate Headquarters: Ph: 1-800-632-2277 Minneapolis, Minnesota Fax: (952) 832-2601 Ph: 1-800-632-2277 www.barr.com Scale AS SHOWN RILEY-PURGATORY-BLUFF CREEK WATERSHED DISTRICT CHANHASSEN/EDEN PRAIRIE, MINNESOTA LAKE RILEY/RICE MARSH LAKE WATER QUALIN IMPROVEMENTS CHANHASSEN EDEN PRAIRIE, MINNESOTA BARR PROJECT No. 23 27-E61 I Date 5-6-05 C CT1 N Drawn NRD CLIENT PROJECT No. Checked SITE RM-1 1 �' AN PLAN NO. BY HK APP DATE REVISION DESCRIPTION RELEASED TO/FOR A B C O 1 2 3 DATE RELEASED Designed DWG. No. Ci-01 REV. No. A DATE REG. NO. Approved DAKOTA IIE 6" ce , °jo g) S 0Lb - O fJ =68e.6 Wood Fence N EL-89 .6 (*6•, M e / c0. 8898>.EL 60. N `••EL= ] 1.1 EL=880.5 / 0 I 30 60 'roil I 8131 DAKOTA LANE `=6?3 i �Cl7Y OF CHANHASSEN a star M E`"68s.a SCALE IN FEET i \ O / _ U86.89 xEla88/0 / / zEL=680.5 1 xEL=889.7 N EL=88 9 �].] _ 00 CN xEL=881.3 `.. \ �� /�/ i 8127 DAKOTA LANE 12 �� l _ 9N1 / Sw 8129 DAKOTA LANE ; ' r I ,FL=B821 p@l .-, EL-881.0 EL-aea.6 /yN fT1 �OP� _22r `6e2.Sw ea1.9 EL tl1�U1'T110415-'�Otfl ,,,_,�y%� M E �- .)y) �.... _. - ELF 88E Z0 xE 655 BS Y i' •r L=s" M 0 TP 0�� 51.L I L T Ln 2 68• MCES �,,�y9L xEL=6eo.e Z 1 _ct-e s"" Am-c E mr, ( L=880.72 / �' 1 � AS E1=886.9 1 / 5� �L=88 .1$ ,' r EL-887.0 / " INTERCEPTOR SEWER S �w" EL-88 1 EL=666 EL-88 6 / xEJ.+6B6.1 / _ su-S/rN-s" WswMCES 66 xEL=8805 �" SN L-8. ChoinlinkSAN xELaBB4 - SANS SAN Fence E -r xEL-05.9 x 885.1 CITY OF Ch" 4LSSEN 9Ax SAN Su, -- � = xEL-8807 0.�887.J L xEL BB3.5 L=88 QnG N - 88 884�Ew6""� _sub- _ VV'l xE 880.4 xE 879.9 _ s.% 885 - - - _ _ �.� EL 88 88A ��qq3 881 _ ` 0� - QQ Sv �•� 0.-880 4 Y � 4 I xE � 0.4 -�..�,�_ `--�886 -_. 0.-8872 86 l - .. /8�� S7(3 -S+O 1 f 880 - - --- --- --_.._.__ �'I � � ... J -7��� xEL=B]9.8 ,.E -879.4 EL=679.5 - WETLAND DEUNEA11ON DRAINAGE L E 879.- -S�"" -- EL=879, - EASEMENT E=x7 Wall E 579.0 '" .1 EL=1 - .EL-8J8.1 -_, 8 sit -eszs 878-- - ----, } �uMIO us o � J 8.0 �`�� EL-M.7 8 ,I ,IeF'858A • • • • cry` -".. i .._ �1rr .] EL=880.] _ -U77\ .• ` `, • • • • • -• L1'�Ll�`-.•_•,_.1-•rr y _. L._-- �-�. = 0.5 EL�12.3 L-wi.3 EL-576.6 �'_�.� xEL.877.5 - �_••�•�`.•. ___.�_ pO E 1 xu u x % UUO La881:2 / • EL-874. • -�_.. ._`_ `_•- 5x = 9 ' 78.7 • • • -�-...►••• 'EL xa-8..8719__- % - _..- ••• % 77r xEL=877.e �-�•�•,•��` , 1�„�.. • ,.. • • � , • _ • • • ..E,L�]6 6 x•+�� b '�.-Ys`• EL=8786� _ xEL-876.3 IxE 76.8 76 -- _-. I "--�11ELr875.7 xEL=B>]. • ,a4 d• � ++• xEL=876.2 . xEL=I77. xEL-BA.4 �-- -- .•. ,•. • • xEL=877.4 \` -"�� ' • • • %EL=814.4 • •6 EL=876.8 • - L- 6 �._"` .EL-9768 • 875 • xEL=876.4 • _ xEL-876.1• • • ,L- 687 . xEL-87.J - z0.-876.0 87 ELJ.0= xEL=876.8 87/ xEL=876.6'•' 7. !o ,0 i ,N 0 1 0 N to i ;o -1 0 a ) i 39 3 n � 04 ? ^I M I N ) N w r` N ,7 v 0 NO. BY HK APP DATE REVISION DESCRIPTION OR REPORT WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I AM A DULY UCENSED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE STATE OF MINNESOTA. SIGNATURE PRINTED NAME DATE REG. NO. DENT Project Office: ID BARR ENGINEERING CO. oNsrRucnoN BARR MINNEAPOLIS, MN. STREET 55435-4803 Corporate Headquarters: Ph: 1-800-632-2277 RELEASED A B C 0 2 3 Minneapolis, Minnesota Fax: (952) 832-2601 TO/FOR DATE RELEASED Ph: 1-800-632-2277 www.barr.com Ik 877 �rE,L.•W9 879.9 x =800.2 xEL=8]93 I xEL=879.a xEL=B>'s.5 F Y 1 WETLAND DELINEATION x L= 79.4 879 ' g . x0.-e19.2 -879.0 ...., 17 1 • "--- ` i xEL=B]8.8 xEL-8788 TP N 'I 1 1 DRAINAGE x _ EASEMENT ixEL-878.3 878.2 xEL=87e3 L 77.2 I ' xEL-877.9 -- 878"- xEL= =877] xEL-OT7.8 Fer'Ce t xEL-877.8 v ` xEL-87 0 1\\ r♦ . --- _-_.877 EL=8767 %0.-876.5 '\• xc -era. �.- _ - . . L NWL 877.0 i i i i' 873 g74 a�5 �• RICE MARSH LAKE PARK xEL_87].7 xEL-877.7 xEL-877.5 877___ %EL-676.6 o erio N 1 S AV E-5 S0 M E o f TNE' TR Ees Ar"N� w Es-r S[bE OF Borw- R61D STAGE STORAGE VOLUMES 0 04 ELEVATIONS ACRES 877 2.32 876 2.07 875 1.92 874 1.75 873 1.60 872 1.45 871 1.30 870 0.06 869 4 I/- �PvoAi S SHOWN LAKE RILEY/RICE MARSH LAKE WATER QUALITY IMPROVEMENTS BARR PROJECT No. 5-6-05 23 27-E61 NRD RILEY-PURGATORY-BLUFF CREEK WATERSHED DISTRICT CHANHASSEN/EDEN PRAIRIE. MINNESOTA CLIENT PROJECT No. CHANHASSEN/EDEN PRAIRIE, MINNESOTA SITE RM-1.1 DWG. No. REV. PLAN C-01 I A LANE UPI 8131 DAKOTA LANE O II I r_ -{ -�`C•1 8127 DAKOTA LANE 8129 DAKOTA LANErn N rn �SW,6ce A i EL= ,96 M xa;,g OF CHANHASSEN xEL=889., /f N 121� I & 6, h�l e� I _ ER sm MI 66" INTERCEPTOR sm SA sm �- SI X ImIsm Chainlink snx snx snX su+ snX s�X _ Fence eNl •� SAE XEL-883.5 _ SIX��� -- - 8845,�;B°'S s"'1�� - g-883-------- _ _ ---'$SP-�- -- -I_ -I_ �__885 - _ `\ 880 x - >. =879.4 WETLAND DELINEATION E =879.3 DRAINAGE EL-879 - --�_ EASEMENT Zl,E>_"eeaoaeB.1 Wall 2 -- xEL-e]e1 --._.�_ __ - = EL-1 878 -- 84 .0 lous --_iYsBlfe-------- 877 �,.•� • 6.9 • • • • • • • • ��] EL=B80J =err. W11 _ • _ "_ 80.5 E EL-878.8 xEL.1�].5 _ 880 wa y E'^Af'A_'�,d \,�`� �� _ EL_B].. 7 _ •, •� 7 .5X 77-­ r. r •76-._ xEL=e765 •xE -.� 76.e . e _ _J�- XEL=6I6.5 zEL-07 xEL=876.2 %EL=I77. xEL-877.4 �'�.,. • `� 1tEl-✓1] • •-_.__ • • aaa r.' • , � �, xEL=877.4 Yx XEL=8]4.{ • 87, zEL-876.4 • • ' _.._ _`_.__. __ xEL-876.1 ,., ,..• \ L- 6. xEL-878.8 871 O .. - - _-_. 87 -'----.-_ • ••`• C7Z :EL=B]6.9 xEL-8T1.7 • • xEL=B]6.B '•� 874 xEL-977.5 v1� ��-.- x£L=8]6.5 ••�,• 875 -876.6 xEL=876.6 •-•••-•••-•••-•u�•••�•••�••• 876 xEL=876.5 • • XEL-878.2 •• CffY OF CHANHA,SSEN •�• 1 -8765 •\ i OPEN WATER I � 1 1 I l 1 I t 1 `La87]� II" �^ EL-BBB.s O =e866 ��� Wood Fence N 6 " / / / ` / EL 6.p' I I 0 30 60 '�(E• , EL= 7 1.1 EL=880.5 a Itar 1MIJI EL-ee20 / I I I/s SCALE IN FEET 886Y69, C} n EL�B1.0 / XEL-BB0.5 $� EL-8B7.7SW 00 xEL=B81.3 L-6B .9 00 _ A _ `I 19m 00 Sw I .kL=8821,.9 ISW22r B1A 8112.4 1RUrnioys ath SW SPA EL= =BB].4, ' 1 ee2.o i ilE+Laprf TP a O#�SAO 88M 00' 7 EL-em.0 SM_�_SIA Xftm0.6 "E=880.72 I I so sot I I EL-8816 I I xEL=886.1 - x 18.6 LT='8806 - .- � xEL=a90.5 xELtiBB{. rEL=885.9 -9851 1 �� CITY OF CHANHASSEN p pp XEL-880.7 0 ��!•�V� _.. V01 ,�-� __ yy,,/ EL�8812 •xEL-M..{ xEL=8B0.4 �UO� xEL-8]9.9 8e0 .8E2.1 �1r ---_...0 4 -4 .n 12717 xEL=879.8 xE .8 I=880.2\� xEL=879.3 xEL=579.4 xEL=B>9fi FOREBAY WETLAND DELINEATION w ' x L= 79.4 7 0 879 xEL=8]B. �% xEL-878.2 EL 6 9/ I xE%879.0 /ter• xEL-878.8 EY'=878.i % 7 • / / C-, --�� xEL=878.8 87 j X~� T 74.5 W.S. 0311 DRAINAGE EASEMENT • z 00 : % xEL=8783 RICE MARSH LAKE PARK -B7 EL-e78.1 ' ,I` . L 70. x f 77. L= 77.2 x 87e2 xEL=878.1 xEL- "--• • B9y1' 79. xEL-877.9 i NWL 877.0 i l_._ _XEL-8A.1 = Z1 •-_.._~~ -- ----_. • XEL-877.9-__.....__. L�e .7 - 878-__ - 7. -e]S8 p„ L- ] % ,�L. xEL-B,]if8� xEL-877.8 Feicepos EL 677.7 xEL-11I e y EL=878. L 7. •,- xEL-877.7 XE =8 0 xEL-BTlx • _..._.----____. xEL-877.5 EL=8767 XEL-876.5 XEL-8]6.6 '\ = I •'� 871 872 873 � 874 875 i -...-...-...-...-...-...-... -876 „ 877 -...- ..�. STAGE STORAGE VOLUMES ELEVATIONS ACRES 877 2.40 876 2.10 875 1.92 874 1.74 873 1.57 872 1.39 871 1.23 870 0.06 869 0.04 I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORT WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS OF THE STATE OF MINNESOTA. SIGNATURE PRINTED NAME CLIENT Project Office: BARR ENGINEERING CO. BARR 4700 WEST 77TH STREET MINNEAPOLIS, MN. 55435-4803 Corporate Headquarters: Ph: 1-600-632-2277 Minneapolis, Minnesota Fax: (952) 832-2601 Ph: 1-800-632-2277 www.barr.com Scale AS SHOWN RILEY-PURGATORY-BLUFF CREEK WATERSHED DISTRICT CHANHASSEN EDEN PRAIRIE MINNESOTA LAKE RILEY/RICE MARSH LAKE WATER QUALITY IMPROVEMENTS CHANHASSEN EDI]d PRAIRIE, MINNESOTA BARR PROJECT No. 23 27-E61 BID Date 5-6-05 CONSTRUCTION Drawn NRD CLIENT PROJECT No. Checked SITE RM-1.1 0' LAN rLl1 N0. BY HK APP DATE REVISION DESCRIPTION RELEASED TO/FOR A 13 C DATE 0 2 3 RELEASED Designed DWG. No. C-01 REV. No. A DATE REG. NO. Approved REMOVE ACCUMULATED SILT FROM BEHIND EXISTING STEEL SHEET PILE WEIR x i Top 60�--RCP 890 E — 8.97 -._Invert " RCP EL'-co�83.70 xEL=892.6 2 =889.8 0 10 __--.------ '� /� XITL=886.' SCALE IN FEET ago O S B CONSfRUCLAID!_.-WIDE GRAVE L• NTENANCEE ROAD ' s C- TO 1" MP xEL(8 2 885 C— t �18 CM P - - j --:-- EL= 88 .4 % — — Tr)n Ai EL = 883.0390.9 X_=89 g B—Inve -1 ' CMP=8 =882xEL .6 EL=883.7 7 .L= 50 fQLt 2.. 9 —�� � — � _ =�` . L'8 \2_`9: � !=6 .9 -.._._.__:__.. 82.6 — 3 �CPE E — 88 3 6 c 8 v _ '_1 S_12'�P �'a CM r: e$e _ _ I STEEL PILE W -- EL=882.78 L=882 �� j — II WEIR=888 0 x �`� A —Inver 9( J I 8.8 Y,•�- $8� L..1 xEL=88 .3 EL=884.7 42 E' �' �. EL 81.7 a86 EL=8�. 886 _ a85 .7x E — 8 .3 EL=884.� _L 883..- / /0 ' 886 METROPOLITAN COUNCIL = 88 j; _ 7 a8b, EL=886.8 r� .._ L E IL--8 x "JxEL 889. I 8�8ak g86 ag6 / 88/T — =888 6 E L= 8 0.4 - - o Ono --`� m EXISTING GRADE REMOVE ACCUMULATED SILT FROM BEHIND WEIR APPROX. 194 CUBIC - — — — YARDS. TOP OF STEEL PIPE \ - WEIR 888.50 -------\ 888.30 r:17 60" RCP \ /''' z' T "'.. .'. ,...' :.•\ I I v INV.-883.70 =8$3;0 ,:..`. I I EXISTING RIP RAP TO I I REMAIN IN PLACE I I II I I PROPOSED MAINTENANCE ROAD EXISTING GRADE : 888.30 f PROPOSED GRADE \ " i EXISTING RIP RAP TO REMAIN IN PLACE 8' CL. 5 MIN. 10' = EXISTING GRADE 1 SECTION: — 1 =5'—O" 0 SILTATION BASIN 5 10 SCALE IN FEET r2"'N SECTION: SILTATION BASIN — 1'=5 —O' 0 5 10 SCALE IN FEET 3 SECTION: MAINTENANCE ACCESS — 1 "=5'—O' 0 5 10 SCALE IN FEET ROAD I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORT WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT 1 AM A DULY LICENLAAWS OF THE STATEOFMIINNNESOTA� THE SIGNATURE PRINTED NAME CLIENT BARR Corporate Headquarters: Minneapolis, Minnesota Ph: 1-800-632-2277 Project Office: BARR ENGINEERING CO.. MINN WEST , MN STREET MINNEAPOLIS, MN. 55435-4803 Ph: 1-800-632-2277 Fax: (952) 832-2601 www.barr.com Scale AS SHOWN RILEY—PURGATORY—BLUFF CREEK WATERSHED DISTRICT CHANHASSEN EDEN PRAIRIE MINNESOTA LAKE RILEY/RICE MARSH LAKE WATER QUALITY IMPROVEMENTS CHANHAssEN/EDEN PRAIRIE, MINNEsoTA BARR PROJECT No. 23 27—E61 BID te 5-17-05 CONSTRUCTION Drown NRD CLIENT PROJECT No. Checked SITE RM-2.5 SILTATION BASIN PLAN N0, F BY HK APP DATE REVISION DESCRIPTION RELEASED TO/FOR A B Ci 2 3 DATE RELEASED Designed DWG. No. C-13 REV. No. A DATE REG. NO. Approved Ir C C cc 0C a C 0 0 30 60 SCALE IN FEET STAGE STORAGE VOLUMES ELEVATIONS ACRES 878.00 2.21 877.00 1.85 876.00 1.70 875.00 1.55 874.00 1.40 873.00 1.25 872.00 1.12 I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION, OR REPORT WAS PREPARED BY ME OR UNDER MY DIRECT SUPERVISION AND THAT I AM A DULY LICENSED MINNESOTA. THE LAAWSPOFF THE STATE OFENGINEER SIGNATURE PRINTED NAME DATE REG. No. CLIENT Project Office: BARB ER ENGINING CO. BARR MINN WEST , MN STREET MINNEAPOUS, MN. 55435-4803 _ a Minnesota : Fax: 1-80 632-2 7 Minneapolis, sHeadquarters: Ph: 1-800-532-2277 www.barr.com scale AS SHOWN RILEY-PURGATORY-BLUFF CREEK WATERSHED DISTRICT CHANHASSEN/EDEN PRAIRIE, MINNESOTA LAKE RILEY/RICE MARSH LAKE WATER QUALITY IMPROVEMENTS CwwHasSEN/EDEN PRAIRIE, MINNESOTA CHKK F'KUJtI:I NO. 23 27—E61 BID Dote 5-17-05 CONSTRUCTION Drawn NRD CLIENT PROJECT No. Checked SITE RM-2.6 p CLAN NO. BY1HK APP DATE REVISION DESCRIPTION RELEASED TO/FOR A 6 C 0 1 2 3 DATE RELEASED Designed DWG. No. C-16 REV. No. A Approved Barr Engineering Company 4700 West 77th Street • Minneapolis, MN 554354803 Phone: 952-832-2600 - Fax: 952-832-2601 • www.barr.com An EEO Employer Minneapolis, MN • Hibbing, MN • Duluth, MN • Ann Arbor, MI • Jefferson City, MO November 22, 2004 Ms. Lori Haak Water Resources Coordinator City of Chanhassen 7700 Market Boulevard P.O. Box 147 Chanhassen, MN 55317 Dear Ms. Haak: REGEIVEm NOV 2 3 2004 CITY OF CHANHASSEN Enclosed is additional information regarding the proposed water quality basins to be constructed as part of the Lake Riley -Rive Marsh Lake Water Quality Improvement Project. The site locations are preliminary, final design and location will be determined once the project is ordered by the Managers. For the basins that are shown to be improved, existing basins are located on these sites but the basins need to be enlarged -deepened to provide the required dead -storage volume necessary to meet NURP criteria. At this time, our preliminary design proposes to deepen these basins, to a depth of no more than 6 %2 feet, to provide this volume. Again, final design will determine the final configuration for the basin. For the basins to be added, these are proposed to be located in natural low areas. Final design will again determine the surface area and depth to be created. The size of the red outline on each of the site maps is approximately the surface area that is needed with a depth of 6 %2 feet to provide the necessary volume. Pleas give me a call if you have any questions or need additional information. Sincerely, Robert C. Obermeyer ■ MR : ME ®r 5 f IN MW _J!_ 181IM320001 Rice Marsh Lake 255530010 26 240110 O p� Om o m o O x�5„ r 1811622330001 'Q. i Proposed Improvement Sites New Ponds to be Added Existing Ponds to be Upgraded Affected Parcels 600 0 600 1200 1800 2400 Feet 200 0 200 400 600 800 Meters AFFECTED PARCELS & PROPOSED IMPROVEMENT SITES Riley Purgatory Bluff Creek Watershed District Chanhassen/Eden Prairie, MN ' � �. • y�' 1 ., f - �- _ j _ • � ♦ VOW /' r a •' t +- t ♦' k t. _"N+ ... M ♦ e'__L"�' v#\ + _-�.mli > ;.., a + f •� dl � • T.- � � f w� ! r O� i,Y �..+�� s?1Ji t � 1� k .. �, �`] _� n 1 ti r`: i • f ..- �yd"f� i+. �5- e� W C i'iY -_ • y' i..� t • ��4n`'_ .. _ S1s T f�i'cfa -�_ �63t{k 'S ,. 1"_'.'� _ 5 """III bQ 31 i : C -- L��• 1 �yJ'ice. .� e'Gr', V fi• X"• x i >, .. Zip ',� - /ar��' l�l�,•+y+'::•' � vye'"i .: t, c \�'L `� - _- �, �� � __ dti .'r t l'd. � q4t�✓ C�.' -9�fn !' �y \" t ; _i ': Nl �1 �+ ��;r �',.. �,,,� •. , i .J� .��i33 t���'jij ! ' y' i � -Y: •:� �'- t'' ._ '' to ..N � d. v �r � / % 1 i Ot } i �. .• • i - i 1r �' ♦ ° O - N �• � N� Q �� •t` ,•� C � -tom • •k �V � °yv. j_, �-Ne�, .I _ �',+ 1 �<�... OD - t ♦ t N � � � ` i a ~ _ . 1P"`�� _ dl iio.+.'. - ��; '_� t6 •d.a • 1 t4t� '�'- -�' �..�.�_... �e-+'q �' 4i, r� �w C , Ill I _ tl1 M r • Y ' � a� �.��ii' � " ,,t^''- • grid. _.= __`" i r 97Or -� �� y 1 • � �' . RM-6.5'>µ' ,a 0 % 1 � /1 1 1 11 1 11 Barr Foo1A. Oa1e:911J2004 ]:59 PM Gil": IT, ,ds 3\2 GWQjB\Pfd�ect\PROPER- M%0 user'. Cal s „ A r 4 z y c o U 4:4 lij __+�1�( ,at 1,4 I� "4 r ir low i v mm r ww—�— t - v - Feet ^, � 50 0 50 100 150 200 AP i + w r RM-2.5 \ _ % i ar��Yu�Y► y w,.� ... C O 0 U ) ol RM-2.6 V4 AL Feet le: 91f*20 3:77. 42 Ph4 File: I:%Prp %2$PLMi1 GtS1PrgooPmperti ftnd_Ams r ory J►r�� ym t.e o yA,r� 4 _. n y � Aft 6 C J o U RM-2.6# \ I J � i % � K ♦ r T f a. Feet d .« 1150 0 50 100 150 200 w a T0t Bert Fe01er Date: 9/1012004 5:06:07 PM File: 1:1ProjectsQ127\E6"GIS\ProjectlPROPER-4.MXD User: bat i M a Y m M. CD U) t a ¢: 911MON 3 42:M PM 1� U., . Wl I . I y y r a. • 900 �q10' �..__ IVA Al4. ��pY • , R • ._;" i Feet 50 0 50 100 150 200 �, 1 z} ►~# as ���• E N� 9 * - __ r 0E s� Feet i 50 0 50 100 150 200 � j14 Page 1 of 1 Haak, Lori From: Mark Wilson [mwilson @ barr.com] Sent: Wednesday, June 15, 2005 2:18 PM To: Haak, Lori Cc: Mark Wilson Subject: Riley Purgatory Bluff Creek Watershed District Hi Lori, Do you have a day, about 6 to 8 hours, within the next two weeks to review 10 separate wetland delineations within the City of Chanhassen? As part of the preliminary planning stage to potentially construct additional water quality basins within the Riley Purgatory Bluff Creek Watershed District (RPBCWD), we have delineated the jurisdictional wetland boundaries and determined the wetland types in ten separate possible areas. All ten of the areas (see attached) contain wetlands (as defined in the 1987 U.S. Army Corps of Engineers Wetland Delineation Manual). By Friday, I will submit a draft Wetland Delineation Report for your use. Below is my current availability: June 21 — 23, 27, 28, and 30. Mark Wilson Wetland Biologist Barr Engineering Company Engineers for the Riley -Purgatory -Bluff Creek Watershed District 4700 West 77th Street Minneapolis, MN 55435 Phone:952-832-2610 Fax: 952-832-2601 mwilson@barr.com 6/15/2005 ^„�es�r+Ftey.Da 6/7/20057t244,'1'� onSi mxd U �'� ¢ * /' ' 1Y["�r2 Idq E L ke Ann v c� see l 7 11 `� �'� ..; Jx'y«•s �^ t m �.., v y / n FWF ~Ltr �� / a WWI y W , 1 .5I10 ) L J yr `te �1..,,! �#hirlil. ->�� I ,� �„ / . /s` s(�� " a, s ��sfR• �� • �"�.� �` � flr �/� a I��Sf. i_ . n ��.Fi r i 1.: - i `t r : a1., ' 41'I '�` i�.�, i> \. A •. `�d% • s llG `�l �a r/ >2, Q m _ , 1\ � � �� / J _ / � - '27'I.- a'0 q .� (, � p l� r �R � � .�L � = .�. z',.; q r'�,u:; `♦ _ \ i a1 '__ I i '1 � r,l � .:! I\ a;• 'y i �, �~ Jl rl\ 17 .. Y ,� _t'. \ ya yti. 1' r tt� .,ti > >ro, .. br • .. � r l imllt9P' . �" •�� 1'- _ lip � st — ..+.,j p w V_ q5�� !r- L6ke bY�� � I l �`'I , � \h �_ �� � .t n NINE. 1• �a �/ '� $o) � \\\\\`—//% � ,�I�lriC ��f..+s1 / F .. rd' \ • a„_. Q'rJ:$ T,.y—`�����, u' / K.� (�yl r'•+..ti �' PJ '�� .r.' �IYJ ��W s r11 si.` t ..,� ( , .. 22 G/� I l y •h. � . Jl j. Lake Susan evs S18 l ,, .* -� "j 11• t' y e "1 •yam soo 4,1 3 1 ,` / 886� x i �. .�' i , a r ill ... ," ". ��°+ aat � _- �•0 1 `,±1 p1 V /i .9130 8 YmanNO 9hf '.' I. I >t • ' i .. ,;. 7 . ' t ,, I v, l , �... 1` • I \ O r' 2 � 1 r' ,. f \ , '•.• ,BI'r , �k7W "l(' ) i J! �tYY r \ ' 0 20 } � c �).� , + _- }!.J \l. (•[er ::) \ \\.`i,. - � , • ° /) �'�al )i ^1.,.� �i ,.. Imo. a !m /��/i— 2000 1.000 0 2.000 W+ 8 ld �J� o , ,.� I Figure 1 i�,..,.� :c WETLAND. EVALUATION SITES "l �j G. / '. i r� J etland Evaluation Sites L� Lake Susan and Rice Marsh Lake Proposed Ponds TV\Nr Riley Purgatory Bluff Creek Watershed District ` Ij'C4Zb�• <Y �'.: r r,.0 `S, \\`. `. /�I,�h.R� Barr Engineering Company 4700 West 77th Street •Minneapolis, MN 55435-4803 �'��^ Phone: 952-832-2600 • Fax: 952-832-2601 • www.barr.com An EEo 1 r BARR Minneapolis, MN • Hibbing, MN • Duluth, MN • Ann Arbor, MI • Jefferson C4tJNOl 7 2005 CITY OF CHANHASSEN TRANSMITTAL To: Ms. Lori Haak Date: June 16, 2005 c: Project #: 23 / 27 — E61 HMR 001 Re: RPBCWD Proposed Ponds We are sending you: ❑ Correspondence ® Reports ❑ Plans ❑ Copy of Letter ❑ Specifications ❑ Other: No. of Copies Description 2 Draft Wetland Delineation Report These are transmitted as checked below: ® For approval ❑ As requested ❑ Other: ❑ For your use ❑ For review and comment: Remarks: Hi Lori, Attached are 2 copies of the draft RPBCWD Proposed Ponds Wetland Delineation Report. Please call me with any questions. Sent by: Mark Wilson Phone: 952 - 832 - 2610 PA23\27\E61\Wet1and Delineation Report\TRANSMITTAL. LETTER.dm G 6j... Pn� 1�',. oftM� fiimd i My W5T P,'JIOwj vs PO,4'/o;V ;V1 w/ 7ff / I -, Msz -rAZ12 of City tc �i A�— 5�yvj c, v re- P. 1 Vi l�n --{{{ k-gfp� e-w. 11110y �rna}� JeS PaS eyv, eM c e w/ CX-) soy ac,L, bell — K; o v c, 'Tr, G11aM �1aS �u , Rona�o - ►� 5 des ?zML &n)I lar��ad !�i-JV2ss — 1'�2c5 Cwf Ev� O Gam, weavow Oki ML, 7 �l .k ti• 1- • b Ora ever . n City staff has reviewed the submitted information and has some concerns related to a number of the sites. RM-1.1: Trail preservation is very important in this area. The District should address any neighborhood concerns associated with the proposed ponding. 2. RM-2.6: Trail preservation is very important in this area. 3. RM-2.8: This site is the site of the City of Chanhassen's proposed water treatment plant. The City has not yet finalized a development plan for the site. Accommodating regional storm water ponding shall be secondary to the development of this site as a treatment plant. Outstanding concerns from the City include: funding; timing; aesthetics; potential for future development; maintenance requirements; and pond siting (keeping the ponds as close to TH 101 and TH 5 as possible). The City requests that the District work very closely with the City on the design and location of the pond. 4. RM-4.11a: This pond is proposed for the Southwest Metro Transit Park and Ride property. The City requests that the District work very closely with the City and property owner on the design and location of the pond. Routing of traffic from TH 212 will be an issue. 5. RM-4.13: It does not appear that this pond will be feasible due to the location of TH 212 and its sound walls. 6. RM-6.9: Homeowner concerns should prevail in this area. 7. 999.16a: The Sand Company owns this property and is currently working on development plans for the area. (A concept plan is available for review at Chanhassen City Hall.) The City will need a trail along the north side of the improved Lyman Boulevard. The northern slope of the trail will need to be graded to reduce the height of the retaining wall that is necessary in that area. The City requests that the District work very closely with the City and property owner on the design and location of the pond. 8. Alum treatments for the lakes should be conducted after the storm water ponds are constructed or improved. This will ensure maximum benefit of the treatment because inflow of new nutrients will be reduced from what currently exists. 9. A number of residents have raised concerns about the way in which they were notified about the proposed project. In order to make sure this project and future District projects are successful, it may be beneficial to involve residents earlier in the process in a less formal fashion. December 20, 2004 C �f Mr. Bob Obermeyer District Engineer CgANgASSEN Riley -Purgatory -Bluff Creek Watershed District 4700 West 77ei Street 7700 Market Boulevard Minneapolis, MN55435 PO Box 147 Chanhassen, MN 55317 RE: Proposed Lake Riley Basic Water Management Project #2003-01 Administration Phone:952.227,1100 Dear Bob: Fax:952227.1110 Building Inspections The City of Chanhassen has received notice of the Lake Riley Basic Water Phone:952.227.1180 Management Project proposed by the Riley -Purgatory -Bluff Creek Watershed Fax 952227.1190 District ("District"). In addition, we have received your November 22, 2004 Engineering letter with the additional information that we requested in order to gain a more Phone:952.227.1160 complete understanding of the improvements proposed by the District. Fax:952227.1170 Finance City staff has reviewed the submitted information and has some concerns Phone.952.227.1140 related to a number of the sites. Below please find the City's comments and Fax: 952.227.1110 concerns: Park & Recreation Phone:952.227.1120 1. RM-1.1: Trail preservation is very important in this area. The District Fax: 952.227.1110 should address any neighborhood concerns associated with the proposed Recreation Center 2310 Coulter Boulevard pending. This may be a good location for ponding since the neighborhood Phone:952.227.1400 uses the area for dumping. Fax: 952.227.1404 2. RM-2.1: No issues. Planning 8 Natural Resources Phone:952.227.1130 3. RM-2.2: NO issues. Fax, 952.227.1110 Public works 4. RM-2.4: No issues. 1591 Park Road Phone:952.227.1300 5. RM-2.5: No issues. Fax: 952227.1310 Senior center 6. RM-2.6: Trail preservation is very important in this area. Phone: 952227.1125 Fax 952227.1110 7 RM-2.8: This site is the site of the City of Chanhassen's proposed water Web site treatment plant. The City has not yet finalized a development plan for the www.ci.chanhassen.mn.us site. Accommodating regional storm water pending shall be secondary to the development of this site as a treatment plant. Outstanding concerns from the City include: funding; timing; aesthetics; potential for future development; maintenance requirements; and pond siting (keeping the ponds as close to TH 101 and TH 5 as possible). The City requests that The City of Chanhassen • A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play. Riley -Purgatory -Bluff Creek Watershed District December 20, 2004 Page 2 of 2 the District work very closely with the City on the design and location of the pond. 8. RM-4.11a: This pond is proposed for the Southwest Metro Transit Park and Ride property. The City requests that the District work very closely with the City and property owner on the design and location of the pond. Routing of traffic from TH 212 will be an issue. 9. RM-4.13: It does not appear that this pond will be feasible due to the location of TH 212 and its sound walls. 10. RM-6.5: No issues. 11. RM-6.9: Homeowner concerns should prevail in this area. 12.999.16a: The Sands Company owns this property and is currently working on development plans for the area. (A concept plan is available for review at Chanhassen City Hall.) The City will need a trail along the north side of the improved Lyman Boulevard. The northern slope of the trail will need to be graded to reduce the height of the retaining wall that is necessary in that area. The City requests that the District work very closely with the City and property owner on the design and location of the pond. The City appreciates the opportunity to provide input on the proposed basic water management project. Please feel free to contact me at 952.227.1135 with comments or questions. Sincerely, CTl'1/'O�F CCHANHASSEN ri Haak Water Resources Coordinator cc: Todd Gerhardt, City Manager Kate Aanenson, Community Development Director Todd Hoffman, Park and Recreation Director Justin Miller, Assistant to the City Manager Paul Oehme, City Engineer/Public Works Director Land Use Summary Approximate Developable Parcel Office (2-story) Parking (@4.5/1000sf) Approximate Coverage w. 1.8 ac. 24,000 sf. 108 stalls 61% 010 Water Treatment Site Study I I ;sngt�m K CLYICj (�r�xih Inc n_ Chanhassen -inn±s a - July, 2004 Haak, Lori From: Oehme, Paul Sent: Wednesday, December 15, 2004 12:03 PM To: 'bobermeyer @ barr.com' Cc: 'Jim W. Sand'; Haak, Lori Subject: Temp construction easement. :.. Talking with Lori Haak at the City and Jim Sand it is my understanding the watershed district would like create additional and/or improve the wetlands on the property the Sands Co. currently is looking at developing. The property is located north of Lyman Blvd and west of TH101. The wetland I am referring to is 999.16a on your exhibit. In conjunction with the 212 project the City is planning to construct a trial on the north side of Lyman Blvd. In order to construct the trial we would either need to build a large retaining wall or obtain additional temporary construction easements for slope grading. Attached is the area we are looking at for construction easements to construct a slope. We are not looking at disturbing the current wetland complex. I would like to work with you and the Sands Co. on this issue. Please feel free to contact me if you have any questions Im TRAIL EASEMENT XHIBIT SANDS C.. Paul Oehme, RE Public Works DirectorlCity Engineer City of Chanhassen 7700 Market Boulevard P.O. Box 147 Chanhassen, MN 55317 Ph. #952-227-1169 Fax. #952-227-1170 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 --------------------- ---------- — ------ --- ) In the matter of the Petitions of the Cities of Chanhassen and Eden Prairie relating ) to Lake Riley Water Quality ) Improvement Project ) I] NOTICE OF FINAL HEARING BY MAIL NOTICE IS HEREBY GIVEN that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the revised Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The Managers are mailing this Notice to each person, corporation or public body that owns property affected by the proposed project as shown by the reports of the Engineer and the Appraisers. As the addressee, your name appears as an affected party. All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the Managers granting the petition, confirming the engineer's report and the appraisers' report and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November 18, 2004 RILEY PURGATORY BLUFF CREEK WATE SHED DISTRICT By Pe Forster, Chair RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 ---- —-------- —----------- ------------ --- ) In the matter of the Petitions of the Cities ) of Chanhassen and Eden Prairie relating ) to Lake Riley Water Quality NOTICE OF HEARING ) Improvement Project ) _---------------------------------------- ----- ) TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: Tracts A and B, Registered Land Survey No. 59, files of the Registrar of Titles, Carver County, Minnesota; containing 15,300 square feet, more or less. Names of parties interested in the above described land and nature of interest: Clifford L. Whitehill Daisy M. Whitehill State of Minnesota City of Chanhassen The Security Mutual Life Insurance Company of Lincoln, Nebraska County of Carver Fee Spouse Easement Easements Mortgage, Assignment Leases and Rents Taxes All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November lb, 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT By Howao Peterson, Secretary RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 ------------ ------------- —------- — --- --- ) In the matter of the Petitions of the Cities of Chanhassen and Eden Prairie relating to Lake Riley Water Quality Improvement Project ) ---------- ------------------------------------ ) NOTICE OF HEARING TO: The City of Chanhassen, c/o Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. Outlot A, Crossroads Plaza Addition, according to the plat thereof on file and of That part of the North % of the Northeast '/4 of Section 13, Township 116, Range 23 adjacent to the right of way of railroad and described as follows: commencing at the point of intersection of West line of the Northeast '/4 of the Northeast '/4 of Section 13 and most southerly right of way line of railroad, and thence northeasterly along said right of way line 120 feet more or less to the South line of Highway 5, thence East on said South line 35 feet more or less to a point on said line of Highway 5 which is 35 feet at right angles from southerly line of railroad right of way, thence southwesterly along a line parallel to southerly line of railroad right of way 122 feet more or less to the West line of the Northeast '/4 of the Northeast '/4 of Section 13, thence North on West line of the Northeast %4 of the Northeast''/4 to beginning; and also that part of the Northwest '/4 of the Northeast ''A of Section 13 described as follows: commencing at the Northeast corner of the Northwest '/4 of the Northeast '/4 of Section 13, thence South 76.6 feet to intersection of East line thereof and southerly right of way line of CMSP railroad, said intersection being point of beginning, thence continue South on East line of the Northwest '/4 of the Northeast '/4 198 feet, thence deflecting right at a 59 degree angle 580 feet, thence deflecting right at 120 degree angle 172.2 feet to southerly right of way of railroad, thence Northeasterly along the right of way line 595.3 feet to point of beginning, except: that part which lies Southeasterly of line running parallel with and 100 feet Northwesterly of line described as follows: from a point on the West line of 7-116-22 8.2 feet North of Southwest comer thereof, running Easterly at an angle of 91 degrees with said West Section line (measured from North to East) 383.19 feet to point of beginning of line, thence Westerly along last described course 100 feet, thence deflecting left on 10 chord spiral curve to left on 2 degree curve 1367.71 feet, thence deflecting left on 10 chord spiral curve of increasing radius 250 feet, thence on tangent to said curve 500 feet and there terminating; containing 10,900 square feet, more or less, together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee State of Minnesota Parcel 2: All that part of the following described tract: That part of the North '/2 of the Northeast '/4 of Section lying Southerly of Southeasterly right-of-way of Northwesterly right-of-way line of Trunk Highway 5, wide running over and across the above described tra parallel with the Southeasterly right-of-way of railroad; containing 10,900 square feet, more or less. Easement 13, Township 116, Range 23 railroad and Northerly of except a strip of land 35 feet ct lying adjacent to and being together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen State of Minnesota Parcel 3: Fee Easement Outlot A, Gateway East, Plat 25287, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota; containing 10,900 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee State of Minnesota Easement Parcel 4: All that part of the following described tract: That part of the Northeast Y, of the Northeast '/. of Section 13, Township 116 North, Range 23 West, shown as Parcel 215 on Minnesota Department of Transportation Right of Way Plat numbered 10-4 as the same is on file and of record in the office of the County Recorder in and for Carver County, Minnesota; Names of parties interested in the above described land and nature of interest: State of Minnesota Fee All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November L, 2004 RILEY PURGATORY BLUFF CREEK WATER HED DISTRICT �/_ — �1-tx t Howar Peterson, Secretary 4 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 ----- —------- --------------------- - — ) In the matter of the Petitions of the Cities ) of Chanhassen and Eden Prairie relating to Lake ater NOTICE OF HEARING RileyY Quality ) Improvement Project ) ---- —------------ —------------------- ----- — ) TO: The City of Chanhassen, c/o Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0,00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. Outlot A, Crossroads Plaza Addition, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota; except the Trunk Highway 5 Right of Way; containing 107,200 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November R, 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT B [. . How d Peterson, Secretary RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 ------------------------------ —---- ----------- ) In the matter of the Petitions of the Cities of Chanhassen and Eden Prairie relating ) NOTICE OF HEARING to Lake Riley Water Quality ) Improvement Project ) -------------- —-------------------- ----------- ) TO: The City of Chanhassen, c/o Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. Outlet A, North Bay, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota; containing 10,000 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee, Easement All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November LO, 2004 RILEY PURGATORY BLUFF CREEK WATEERRSHED DISTRICT AY4.e,A� JXt�!— — Howar Peterson, Secretary 2 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 -------------------------------------- — ---- --- ) In the matter of the Petitions of the Cities of Chanhassen and Eden Prairie relating ) to Lake Riley Water Quality ) Improvement Project ) C NOTICE OF HEARING TO: The City of Chanhassen, c/o Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the I eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. Outlot A, Hidden Valley, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota; Containing 35,300 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November (t), 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT r Ho and Peterson, Secretary RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 -------------------------- --------------------- ) In the matter of the Petitions of the Cities ) of Chanhassen and Eden Prairie relating ) to Lake Riley Water Quality NOTICE OF HEARING ) Improvement Project ) -------------------------- ------------------- ) TO: The City of Chanhassen, c/o Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. Outlot C, Chanhassen Estates 2nd Edition, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota; containing 56,600 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee Metropolitan Council Easements Parcel 2 All that part of the following described tract: That part of Outlot C, Chanhassen Estates 2nd Edition, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota, described as follows: Commencing at the most southerly corner of Outlot A in said addition; thence on an assumed bearing of South 0 degrees, 48 minutes and 27 seconds West, along the east line of said Outlot C, a distance of 215.00 feet, to the beginning of the property to be described: thence North 89 degrees, 11 minutes and 33 seconds West a distance of 200.00 feet; thence South 0 degrees, 48 minutes and 27 seconds West a distance of 100.00 feet; thence South 89 degrees, 11 minutes and 33 seconds East a distance of 200.00 feet, to the East line of said Outlot C; thence North 0 degrees, 48 minutes and 27 seconds East along said East line, a distance of 100.00 feet, to the point of beginning. Names of parties interested in the above described land and nature of interest: Metropolitan Council Fee 2 All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November (D 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT By L� Howasd Peterson, Secretary RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 ------ —---------------- —----- — -------- --- ) In the matter of the Petitions of the Cities of Chanhassen and Eden Prairie relating ) NOTICE OF HEARING to Lake Riley Water Quality ) Improvement Project ) --------------------- --- ---- -- -------- ----- ) TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: That part of the West %2 of the Northwest `/4 of Section 24, Township 116, Range 23, except the North 660 feet thereof and except PID# 25.0242410 to James Curry, and except PID# 25.0242411 to U.S. West Vector Group, and except PID# 25.024213 to Minnesota Department of Transportation, and except any part of PID# 25.0242500 formerly deeded to Minnesota Department of Transportation; containing 25,000 square feet, more or less. Names of parties interested in the above -described land and nature of interest State of Minnesota City of Chanhassen Fee Easement All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the engineer's report and the appraisers' report and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November /O, 2004 RILEY PURGATORY BLUFF CREEK WATER HED DISTRICT B4-La-t- 'H ow d Peterson, Secretary 2 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 ----------------------- ------------- -------- ) In the matter of the Petitions of the Cities of Chanhassen and Eden Prairie relating ) NOTICE OF HEARING to Lake Riley Water Quality ) Improvement Project ) ----------- ------------------------- --------- ) TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: That part of the Southeast '/< of the Northeast Y. of Section 23, Township 116, Range 23 described as: Commencing at the East '/4 corner of Section 23 thence Northerly on East line on an azimuth of 259 degrees 88.01 feet to the point of beginning, thence on an azimuth of 270 degrees 779.79 feet, thence on an azimuth of 51 degrees 955.61 feet, thence on an azimuth of 100 degrees 33.52 feet to East line of Section 23, thence on an azimuth of 179 degrees on East Section Line 604.46 feet to point of beginning. Containing 36,000 square feet, more or less. Names of parties interested in the above described land and nature of interest: James A. Curry Fee Barbara A. Curry Spouse Williams Brothers Pipe Line Company Easement The First National Bank of Saint Paul Mortgage City of Chanhassen Easement Northwestern Bell Telephone Company Easement County of Carver Taxes All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the engineer's report and the appraisers' report and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November LO, 2004 RILEY PURGATORY BLUFF CREEK WATERSJIED DISTRICT Secretary RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 ---------------------------- ------ ------ ) In the matter of the Petitions of the Cities of Chanhassen and Eden Prairie relating ) to Lake Riley Water Quality ) Improvement Project ) NOTICE OF HEARING ------------- -- ---- —------------ -- ----- -- ) r TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: Lot 2, Block 4, Hidden Valley, Carver County, Minnesota; containing 7,400 square feet, more or less. Names of Parties interested in the above -described land and nature of interest: Jason K. Lehman and Laura J. Lehman City of Chanhassen United Mortgage Corporation Chase Manhattan Mortgage Corp. Chase Manhattan Bank U.S.A., N.A. County of Carver Fee Easement Protective Covenants Mortgage Mortgage Taxes All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November LD, 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT 4How d Peterson, Secretary I RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 C In the matter of the Petitions of the Cities of Chanhassen and Eden Prairie relating ) NOTICE OF HEARING to Lake Riley Water Quality ) Improvement Project ) ------------------------------------------------ ) TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: Lot 3, Block 1, Chan Haven Plaza 4th Addition, according to the plat thereof on file or of record in the office of the County Recorder, Carver County, Minnesota; containing 11,300 square feet, more or less. Names of parties interested in the above -described land and nature of interest: DYS Properties City of Chanhassen Union Bank and Trust Company County of Carver Fee Easement Roadway Easement Mortgage, Assignment of Leases and Rents Taxes All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November /0, 2004 RILEY PURGATORY BLUFF CREEK WATE HED DISTRICT How Peterson, Secretary RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 ------------------------------------------------ ) In the matter of the Petitions of the Cities of Chanhassen and Eden Prairie relating ) NOTICE OF HEARING to Lake Riley Water Quality ) Improvement Project ) ------------------------------------------------ ) TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: The East 479.05 feet of the West 628.05 feet of that part of the Southwest '/4 of Section 7, Township 116 North, Range 22 West of the Principal 5th Meridian, lying Southerly of the right of way of the Chicago, St. Paul and Pacific Railway; containing 8,700 square feet, more or less. Names of parties interested in the above described land and nature of interest: CRB Family, L.P. State of Minnesota City of Chanhassen General Electric Capital Business Asset Funding Corporation County of Hennepin Fee Final Certificate for Trunk Highway Purposes Easements Mortgage, Assignment of Leases and Rents Taxes All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the engineer's report and the appraisers' report and ordering the establishment and construction or implementation of the project. 2 BY ORDER OF THE BOARD OF MANAGERS DATED: November 1.0 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT By � V-- Ho Peterson, Secretary {>A`6 Y -I 1 L> 071 J - - - 25696001 `W --. I E: y 25ab 2" e 25M .e 2509 a 2" w 2" 17 25oe 2509 2502 i A =f h > y - 1611622370001 ' `— - — Marsh lake i —191182af0039- - -' 19116223/00P/- 1911622340M, 19116223/0003- 1911622340002-- 1911622340007 " O Proposed Improvement Site 600 0 600 1200 1800 2400 Feet 200 0 200 400 600 800 Meters AFFECTED PARCELS Riley Purgatory Bluff Creek Watershed District Chanhassen/Minnetonka, MN r RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 ----------- —-------------------------- — ----- — ) RECEIVED In the matter of the Petitions of the Cities ) of Chanhassen and Eden Prairie relating NOV 17 2004 ) NOTICE OF HEARING to Lake Riley Water Quality ) CITY OF CHANHASSEN Improvement Project ) TO: The City of Chanhassen, c/o Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the I eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. Outlot A, Crossroads Plaza Addition, according to the plat thereof on file and of That part of the North '/z of the Northeast %4 of Section 13, Township 116, Range 23 adjacent to the right of way of railroad and described as follows: commencing at the point of intersection of West line of the Northeast '/4 of the Northeast '/4 of Section 13 and most southerly right of way line of railroad, and thence northeasterly along said right of way line 120 feet more or less to the South line of Highway 5, thence East on said South line 35 feet more or less to a point on said line of Highway 5 which is 35 feet at right angles from southerly line of railroad right of way, thence southwesterly along a line parallel to southerly line of railroad right of way 122 feet more or less to the West line of the Northeast '/4 of the Northeast '/4 of Section 13, thence North on West line of the Northeast''/4 of the Northeast'/4 to beginning; and also that part of the Northwest '/4 of the Northeast '/4 of Section 13 described as follows: commencing at the Northeast comer of the Northwest '/4 of the Northeast '/4 of Section 13, thence South 76.6 feet to intersection of East line thereof and southerly right of way line of CMSP railroad, said intersection being point of beginning, thence continue South on East line of the Northwest'/4 of the Northeast'/4 198 feet, thence deflecting right at a 59 degree angle 580 feet, thence deflecting right at 120 degree angle 172.2 feet to southerly right of way of railroad, thence Northeasterly along the right of way line 595.3 feet to point of beginning, except: that part which lies Southeasterly of line running parallel with and 100 feet Northwesterly of line described as follows: from a point on the West line of 7-116-22 8.2 feet North of Southwest comer thereof, running Easterly at an angle of 91 degrees with said West Section line (measured from North to East) 383.19 feet to point of beginning of line, thence Westerly along last described course 100 feet, thence deflecting left on 10 chord spiral curve to left on 2 degree curve 1367.71 feet, thence deflecting left on 10 chord spiral curve of increasing radius 250 feet, thence on tangent to said curve 500 feet and there terminating; containing 10,900 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee 2 State of Minnesota Parcel 2: All that part of the following described tract: Easement That part of the North '/2 of the Northeast '/< of Section 13, Township 116, Range 23 lying Southerly of Southeasterly right-of-way of railroad and Northerly of Northwesterly right-of-way line of Trunk Highway 5, except a strip of land 35 feet wide running over and across the above described tract lying adjacent to and being parallel with the Southeasterly right-of-way of railroad; containing 10,900 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen State of Minnesota Parcel 3: Fee Easement Outlot A, Gateway East, Plat 25287, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota; containing 10,900 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee State of Minnesota Easement Parcel 4: All that part of the following described tract: That part of the Northeast '/. of the Northeast '/. of Section 13, Township 116 North, Range 23 West, shown as Parcel 215 on Minnesota Department of Transportation Right of Way Plat numbered 10-4 as the same is on file and of record in the office of the County Recorder in and for Carver County, Minnesota; Names of parties interested in the above described land and nature of interest: State of Minnesota Fee All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November L, 2004 RILEY PURGATORY BLUFF CREEK WATER HED DISTRI�CT� y1,� ,:'-U �-fin, Howar Peterson, Secretary 0 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 ------ —---- —------- —--- —-------------- ----- ) RECEIVED In the matter of the Petitions of the Cities NOV 17 2004 of Chanhassen and Eden Prairie relating NOTICE OF HEARING to Lake Riley Water Quality CITY OF CHANHASSEN Improvement Project ) ------------------------------------------------ ) TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: Lot 2, Block 4, Hidden Valley, Carver County, Minnesota; containing 7,400 square feet, more or less. Names of Parties interested in the above -described land and nature of interest: Jason K. Lehman and Laura J. Lehman City of Chanhassen United Mortgage Corporation Chase Manhattan Mortgage Corp. Chase Manhattan Bank U.S.A., N.A. County of Carver Fee Easement Protective Covenants Mortgage Mortgage Taxes All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November LD 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT By-, i!'t� How d Peterson, Secretary FA AB Q th RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 In the matter of the Petitions of the Cities > DECEIVED of Chanhassen and Eden Prairie relating NOTICE OF HEARING NOV 17 2004 to Lake Riley Water Quality Improvement Project CITY OF CHANHASSEN ----------------------------------------------- ) TO: The City of Chanhassen, c/o Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. Outlot A, Hidden Valley, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota; Containing 35,300 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November (p, 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT Ho and Peterson, Secretary RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 RECEIVED In the matter of the Petitions of the Cities NOV 17 2004 of Chanhassen and Eden Prairie relating NOTICE OF HEARING to Lake Riley Water Quality CITY OF CHANHASSEN Improvement Project ) ----- ------------------------------------------- ) TO: The City of Chanhassen, c/o Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide stone water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. Outlot A, Crossroads Plaza Addition, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota; except the Trunk Highway 5 Right of Way; containing 107,200 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November h7, 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT How d 13eterson, Secretary 04 (V,w RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 --------------- -------------------------------- ) RECEIVED In the matter of the Petitions of the Cities N 0 V 1 7 2004 of Chanhassen and Eden Prairie relating ) NOTICE OF HEARING to Lake Riley Water Quality ) CITY OF CHANHASSEN Improvement Project ) ------------ ------ ----------------- ------------ ) TO: The City of Chanhassen, c/o Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. Outlot A, North Bay, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota; containing 10,000 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee, Easement All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November (l91 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT Howar Peterson, Secretary 2 3 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 -------------- -------------------------------- ) In the matter of the Petitions of the Cities > RECEIVED of Chanhassen and Eden Prairie relating to Lake Riley Water Quality ) NOTICE OF HEARING NOV 17 2004 Improvement Project ) CITY OF CHANHASSEN --------------------- ------------------------- ) TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: Tracts A and B, Registered Land Survey No. 59, files of the Registrar of Titles, Carver County, Minnesota; containing 15,300 square feet, more or less. Names of parties interested in the above described land and nature of interest: Clifford L. Whitehill Daisy M. Whitehill State of Minnesota City of Chanhassen The Security Mutual Life Insurance Company of Lincoln, Nebraska County of Carver Fee Spouse Easement Easements Mortgage, Assignment Leases and Rents Taxes All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. 2 BY ORDER OF THE BOARD OF MANAGERS DATED: November 10, 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT By HowajA Peterson, Secretary 2 , RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 > RECEIVED In the matter of the Petitions of the Cities N 0 U 1 7 2004 of Chanhassen and Eden Prairie relating NOTICE OF HEARING to Lake Riley Water Quality CITY OF CHANNASSEN Improvement Project ) -------------------------------- --------------- ) TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: Lot 3, Block 1, Chan Haven Plaza 4th Addition, according to the plat thereof on file or of record in the office of the County Recorder, Carver County, Minnesota; containing 11,300 square feet, more or less. Names of parties interested in the above -described land and nature of interest: DYS Properties City of Chanhassen Union Bank and Trust Company County of Carver Fee Easement Roadway Easement Mortgage, Assignment of Leases and Rents Taxes All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November /19, 2004 RILEY PURGATORY BLUFF CREEK WATE HED DISTRICT How Peterson, Secretary 2 f' RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 RECEIVED In the matter of the Petitions of the Cities NOV 17 2004 of Chanhassen and Eden Prairie relating to Lake Riley Water Quality NOTICE OF HEARING CITY OF CHANHASSEN Improvement Project ) ------------------------------------------------ ) TO: The City of Chanhassen, c/o Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and stone water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. Outlot C, Chanhassen Estates 2nd Edition, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota; containing 56,600 square feet, more or less. together with the other rights as set forth below, forming and being part of said Parcel 1: Names of parties interested in the above described land and nature of interest: City of Chanhassen Fee Metropolitan Council Easements Parcel 2 All that part of the following described tract: That part of Outlot C, Chanhassen Estates 2nd Edition, according to the plat thereof on file and of record in the office of the County Recorder, Carver County, Minnesota, described as follows: Commencing at the most southerly comer of Outlot A in said addition; thence on an assumed bearing of South 0 degrees, 48 minutes and 27 seconds West, along the east line of said Outlot C, a distance of 215.00 feet, to the beginning of the property to be described: thence North 89 degrees, 11 minutes and 33 seconds West a distance of 200.00 feet; thence South 0 degrees, 48 minutes and 27 seconds West a distance of 100.00 feet; thence South 89 degrees, 11 minutes and 33 seconds East a distance of 200.00 feet, to the East line of said Outlot C; thence North 0 degrees, 48 minutes and 27 seconds East along said East line, a distance of 100.00 feet, to the point of beginning. Names of parties interested in the above described land and nature of interest: Metropolitan Council Fee All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the report of the engineer and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November ID, 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT By Howasd Peterson, Secretary 6:6) RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 ------------------------------------------------ ) In the matter of the Petitions of the Cities of Chanhassen and Eden Prairie relating ) to Lake Riley Water Quality ) Improvement Project ) ----------- —--- ------------------------------ ) NOTICE OF HEARING RECEIVED NOV 1 T 2004 CITY OF CHANHASSEN TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and stone water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the 1 eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 10313.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: That part of the Southeast '/< of the Northeast %. of Section 23, Township 116, Range 23 described as: Commencing at the East '/4 corner of Section 23 thence Northerly on East line on an azimuth of 259 degrees 88.01 feet to the point of beginning, thence on an azimuth of 270 degrees 779.79 feet, thence on an azimuth of 51 degrees 955.61 feet, thence on an azimuth of 100 degrees 33.52 feet to East line of Section 23, thence on an azimuth of 179 degrees on East Section Line 604.46 feet to point of beginning. Containing 36,000 square feet, more or less. Names of parties interested in the above described land and nature of interest: James A. Curry Fee Barbara A. Curry Spouse Williams Brothers Pipe Line Company Easement The First National Bank of Saint Paul Mortgage City of Chanhassen Easement Northwestern Bell Telephone Company Easement County of Carver Taxes All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the engineer's report and the appraisers' report and ordering the establishment and construction or implementation of the project. 2 BY ORDER OF THE BOARD OF MANAGERS DATED: November /O, 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT Secretary 00 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 --------- -------------------------------------- ) DECEIVED In the matter of the Petitions of the Cities NOV 17 2004 of Chanhassen and Eden Prairie relating NOTICE OF HEARING to Lake Riley Water Quality CITY OF CHANHASSEN Improvement Project ) ----------- ---------------------------------- ) TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: The East 479.05 feet of the West 628.05 feet of that part of the Southwest '/4 of Section 7, Township 116 North, Range 22 West of the Principal 5th Meridian, lying Southerly of the right of way of the Chicago, St. Paul and Pacific Railway; containing 8,700 square feet, more or less. Names of parties interested in the above described land and nature of interest: CRB Family, L.P. State of Minnesota City of Chanhassen General Electric Capital Business Asset Funding Corporation County of Hennepin Fee Final Certificate for Trunk Highway Purposes Easements Mortgage, Assignment of Leases and Rents Taxes All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the engineer's report and the appraisers' report and ordering the establishment and construction or implementation of the project. 2 BY ORDER OF THE BOARD OF MANAGERS DATED: November 1.0 2004 RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT By How Peterson, Secretary t u RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT LAKE RILEY BASIC WATER MANAGEMENT PROJECT #2003-01 --------- --------------- ---------------------- ) RECEIVE® In the matter of the Petitions of the Cities N 0 U 1 i 2004 of Chanhassen and Eden Prairie relating ) NOTICE OF HEARING to Lake Riley Water Quality ) Improvement Project CITY OF CHANHASSEN) ----------------------------------------- ------- ) TO: The City of Chanhassen, by its Mayor Tom Furlong, 7700 Market Boulevard, P.O. Box 147, Chanhassen, MN 55317. PLEASE TAKE NOTICE that, pursuant to Minnesota Statutes Section 103D.741, the Managers of the Riley Purgatory Bluff Creek Watershed District shall hold a final hearing on the petitioned project on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, to determine whether the Lake Riley Basic Water Management Project should be established and ordered. The cities of Chanhassen and Eden Prairie petitioned the Managers of the Riley -Purgatory - Bluff Creek Watershed District to establish and implement the Lake Riley Basic Water Management Project at the February 5, 2003 meeting of the Managers. The Managers directed the Preparation of the District's Engineer's report on the proposed improvement. The Engineer's report was filed with the Managers and submitted to the Director of the Division of Waters of the Department of Natural Resources and the Board of Water and Soil Resources. The advisory reports of the Director of the Division of Waters, dated July 2, 2004, and of the Board of Water and Soil Resources, dated June 25, 2004, approved the project as a practical plan. The Engineer's report has been revised to address the recommendations of the Director and Board. The Engineer's report and the advisory reports of the Director and Board are available for inspection. A revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. The purpose of the project is to improve the water quality of Lake Riley and Rice Marsh Lake by reducing internal and external sources of phosphorous in and to the lakes that contribute to algae growth, resulting in decreased water quality, clarity and transparency. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. The project also proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the eastern boundary of Chanhassen and the western boundary of Eden Prairie. The Engineer's report includes a map of the affected areas. The estimated cost of the improvements is $2,740.500.00 as set forth in the Engineer's report. Pursuant to Minnesota Statutes Section 103D.905, the Managers propose to annually levy a tax not to exceed 0.00798 percent of taxable market value for a period not to exceed 15 consecutive years to pay the cost attributable to the basic water management features of the project. The Managers have determined the benefits and damages to the property affected by the proposed project. The benefits and damages are set forth in the report of the Appraiser, which has been filed with the Managers and is available for inspection. The project proposes to take all of that part of the following: That part of the West %2 of the Northwest '/4 of Section 24, Township 116, Range 23, except the North 660 feet thereof and except PID#` S Q242410 to James Curry, and except PID# 25.0242411 to U.S. West Vector Group, and except PID# 25.024213 to Minnesota Department of Transportation, and except any part of PID# 25.0242500 formerly deeded to Minnesota Department of Transportation; containing 25,000 square feet, more or less. Names of parties interested in the above -described land and nature of interest State of Minnesota City of Chanhassen Fee Easement All parties interested in the proposed project are to appear before the managers at the time and place designated in this final hearing notice to present objections, and to show why an order should not be made by the managers granting the petition, confirming the engineer's report and the appraisers' report and ordering the establishment and construction or implementation of the project. BY ORDER OF THE BOARD OF MANAGERS DATED: November LO 2004 RILEY PURGATORY BLUFF CREEK WATER HED DISTRICT B 4_Lac_ How d Peterson, Secretary WATER RESOURCES � Monthly Update — November 2004 Cl l 11p OF TO: Todd Gerhardt, City Manager ;HOHMSEN FROM: Lori Haak, Water Resources Coordinator 7700 Ma k,I Boulevard PO Box 147 DATE: November 30, 2004 Chanhassen, MN 55317 Administration Phone:952.227.1100 SURFACE WATER MANAGEMENT PLAN UPDATE Fax: 952.227.1110 Building Inspections On November 8, 2004, the City Council awarded the contract for the 2004 Phone:952,227.1180 Surface Water Management Plan Update to Short Elliott Hendrickson, Inc. Fax: 952.227.1190 (SEH) in the amount of $300,300.00 minus costs incurred under the advance Engineering authorization to perform up to $10,000 of the wetland inventory and Phone:952.227.1160 assessment. At one of the work sessions prior to the award of the contract, the Fax:952.227.1170 City Council requested regular updates as to the progress. Finance Phone:952.227,1140 The Agreement for Professional Engineering Services between the City and Fax: 952.227.1110 SEH was signed on November 18, 2004 (Attachment 1). City and SEH staff Park & Recreation held a kick-off meeting on November 23 to discuss the plan update and the Phone:952.227.1120 transfer of information from the City to SEH. City staff is currently compiling Fax: 952zz7.1110 the information that will be given to SEH for their use in plan preparation. Recreation Caft 2310Cougar Pner�e ss2z27.t400 52227.1400 At the November 23 meeting, SEH indicated that 33 wetlands (approximately g. (PP Y Fax: %M7.1404 8% of the total) had been inventoried and assessed in conjunction with the advance authorization. Planning & Natural Resources Phone: 952,227.1130 Fax 952.227.1110 BLUFF CREEK REMEANDEWNG PROTECT Public Works 1591 Park Road In May 2003, Council awarded a contract to Sunram Construction, Inc. for the Phone:952.227.1300 remeandering of Bluff Creek on City property just west of Lake Drive West Fax:952,227.1310 and south of the railroad. The new channel for Bluff Creek was constructed Senior Carrier by Sunram during July 2003. The vegetation in the channel was allowed to Phone:952.227.1125 establish through October 2004. In October, City street crews completed the Fax:952,22zm0 project by diverting Bluff Creek from the old, eroding channel to its new, Web site remeandered home. Photos of this project are attached (Attachment 2). www.ci.chanhassen.mn.us COUNTRY OAKS NEIGHBORHOOD DRAINAGE IMPROVEMENT Since 2001, City staff has been in conversations with the residents in the Country Oaks, Oaks of Minnewashta and Oak Ridge subdivisions regarding storm water drainage and groundwater issues within that neighborhood. The City of Chanhassen • A growing community with clean lakes, quality schools, a champing downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play. Water Resources Monthly Update November 30, 2004 Page 2 of 2 These three subdivisions converge at a single point and it appears that storm water is: were not adequately anticipated and addressed during the subdivision and build -out processes. On October 11, 2004, Council awarded a contract to Kusske Construction Inc. for the construction of a Swale to redirect runoff into a storm water pond. The C consultant, Kusske Construction and City staff met with affected residents on October 14 to discuss the project and concerns of the property owners. Kusske Construction began work on the project on November 22 and completed work on November 23. Initially, there were some concerns regarding the extent of work being done on the affected properties, but it seems that those concerns have been addressed. Staff and the consultant are pleased with the outcome of this project and believe it will provide some relief to downstream properties. Photos of this project are attached (Attachment 2). LAKE RILEY/RICE MARSH LAKE PETITION In December 2002, the Cities of Chanhassen and Eden Prairie petitioned the Riley - Purgatory -Bluff Creek Watershed District (District) to complete the items recommended within the Riley and Rice Marsh Lake Use Attainability Analyses to improve the quality of storm water runoff entering Riley Lake. In May 2004, the District issued the Engineer's Report on the Lake Riley Water Quality Improvement Project. Since then, the District has had the affected properties appraised. In late November 2004, the directly affected property owners were served with notices of the final hearing on the petitioned project to be held on December 20, 2004 at 7:00 p.m. at Eden Prairie City Hall. Other property owners adjacent to Lake Riley and Rice Marsh Lake were notified of the hearing by mail. The City received several calls regarding the notice sent by the District to property owners. Staff had a number of concerns regarding the process taken by the District to alert residents of the proposed project and outlined them in a November 29 email to the District's legal counsel and engineer (Attachment 3). The hearing is still scheduled for Monday, December 20, 2004 at 7:00 p.m. City staff will be attending the hearing. ATTACHMENTS 1. Agreement for Professional Engineering Services between the City and SEH 2. Photos of Bluff Creek Remeandering and Country Oaks Projects 3. E-mail from City staff to P. Haik, Legal Counsel for Riley -Purgatory -Bluff Creek Watershed District AGREEMENT FOR PROFESSIONAL ENGINEERING SERVICES THIS AGREEMENT is made on the lid day of Npytm6e 2004, between the CITY OF CHANHASSEN, a Minnesota municipal corporation, hereinafter called the "CITY", and SHORT ELLIOTT HENDRICKSON INC., a Minnesota corporation, hereinafter called the "ENGINEER." THE CITY and the ENGINEER agree as follows: Contract Documents. The ENGINEER agrees to provide engineering services to the CITY in accordance with the following contract documents which are incorporated herein by reference: A. Agreement for Professional Engineering Services. B. City of Chanhassen Request for Proposed Surface Water Management Planning Update May 2004 ("RFP"). C. ENGINEER'S Fee Schedule dated September 17, 2004 ("Fee Schedule"). D. ENGINEER'S response to RFP entitled Proposal for Surface Water Management Plan Update, Chanhassen, Minnesota dated June 30, 2004, amended proposal dated August 6, 2004, including alternates "B" and "C", Scope of Services Amendment No. 2 dated September 17, 2004, and Estimated Hours and Project Costs amended October 13, 2004. In the event of conflict among the documents, the conflict shall be resolved in descending order of priority. Payment. ENGINEER shall be paid for the services described in paragraph 1 on an hourly basis in accordance with the Fee Schedule, but an amount not to exceed $300,300 inclusive of reimbursable costs. 3. Method of Payment: Payment for each task or subtask as described in the following paragraphs shall be for the billable hours and reimbursable expenses charged to the task or subtask. Payment for the project in full is subject to the not -to -exceed contract limit of $300,300. If billings for a task or subtask exceed the estimated hours and project cost incurred by the ENGINEER for the completed portions of the project to date, the CITY may reduce payment to ensure that the not to exceed contract limit is met. 113878v11 RNKa10l29/2004 Task 1 - Project Initiation / Data Collection Payment for Task 1 shall be made following ENGINEER delivering the data collection memorandum, as described in Subtask 1.4, to CITY staff. Task 2 - Public Input and Involvement Process Payment for fees incurred under Task 2 shall be made on a per -meeting basis. ENGINEER shall be paid for each of the 10 meetings prepared for and attended under this task. Task 3 - Update 1994 Surface Water Management Plan Payment for Task 3 shall be based on the completion of each Subtask, except for Subtasks 3.4 and 3.813. Completion of each task is defined, for example, as the submittal of the electronic GIS file (Task 3.1) or the document describing recommendations (Task 3.2) to CITY staff. Payment Subtask 3.4 shall be made upon completion of and delivery of the preliminary model to CITY staff. We anticipate that the preliminary model will be at the 80 percent complete stage. Payment for the balance shall be made following revisions to and delivery of the final model. Payment for Subtask 3.813 shall be made following delivery of the recommendation memorandum for each to the ten (10) study areas. Task 4 - Coordinate Plan Update with NPDES MS4 Permit Payment for Task 4 shall be based on the completion of each Subtask, except for Subtasks 4.1 and 4.3. Completion of each task is defined, for example, as the submittal of the document describing recommendations (Task 4.6) to CITY staff. Payment for Subtask 4.1 shall be made in equal amounts of the total subtask cost at the 25, 50 75 and 100 percent complete stages. Completion of the each 25 percent interval is based on the delivery of electronic raw survey and field data to CITY staff collected for approximately 25 percent of the estimated structures (e.g., 1125 of 4500). Payment for Subtask 4.3 shall be made in equal amounts of the total subtask cost at the 25, 50 75 and 100 percent complete stages. Completion of the each 25 percent interval is based on the delivery of GIS coverage data to CITY staff for approximately 25 percent of the estimated structures. Task 5 - Develop Comprehensive Wetland Management Plan Payment for Task 5 shall be based on the completion of each Subtask, except for Subtasks 5.1 and 5.2. Completion of each task is defined, for example, as the submittal of the document describing recommendations (e.g., Task 5.3 - delivery of draft wetland management ordinance) to CITY staff. 113878vl1 2 RNKAO/29/2004 Payment for Subtask 5.1 and 5.2 shall be made on a monthly basis following delivery of the MnRAM data collected and prepared in GIS format in the preceding month. Task 6 — Surface Water Management Plan Completion Payment for Task 6 shall be based on the completion of each Subtask, except for Subtask 6.4. Payment for fees incurred under Subtask 6.4 shall be made on a per - meeting basis. ENGINIEER shall be paid for each of the three (3) meetings prepared for and attended under this task. 4. Warranty. ENGINEER shall be responsible for the accuracy of the work and shall promptly make necessary revisions or corrections resulting from errors and omissions on the part of ENGINEER without additional compensation. ENGINEER shall exercise the same degrees of care, skill, and diligence in the performance of the services as is ordinarily possessed and exercised by a professional engineer under similar circumstances. No other warranty, expressed or implied, is included in this Agreement or in any drawing, specification, report, or opinion produced pursuant to this Agreement. 5. Termination. This Agreement may be terminated by either party by two (2) days' written notice delivered to the other party at the address written above. Upon termination under this provision if there is no fault of the ENGINEER, the ENGINEER shall be paid for services rendered and reimbursable expenses until the effective date of termination, except that ENGINEER will not be paid for incomplete tasks or subtasks set forth in paragraph 3 above. If the CITY terminates the Agreement because the ENGINEER has failed to perform in accordance with this Agreement, no further payment shall be made to the ENGINEER, and the CITY may retain another engineer to undertake or complete the work identified in Paragraph 1. 6. Subcontractor. The ENGINEER shall not enter into subcontracts for services provided under this Agreement without the express written consent of the CITY. The ENGINEER shall pay any subcontractor involved in the performance of this Agreement within ten (10) days of the ENGINEER'S receipt of payment by the CITY for undisputed services provided by the subcontractor. If the ENGINEER fails within that time to pay the subcontractor any undisputed amount for which the ENGINEER has received payment by the CITY, the ENGINEER shall pay interest to the subcontractor on the unpaid amount at the rate of 1-1/2 percent per month or any part of a month. The minimum monthly interest penalty payment for an unpaid balance of $100 or more is $10. For an unpaid balance of less than $100, the ENGINEER shall pay the actual interest penalty due to the subcontractor. A subcontractor who prevails in a civil action to collect interest penalties from the ENGINEER shall be awarded its costs and disbursements, including attorney's fees, incurred in bringing the action. 7. Independent Contractor. At all times and for all purposes herein, the ENGINEER is an independent contractor and not an employee of the CITY. No statement herein shall be construed so as to find the ENGINEER an employee of the CITY. 113878A1 3 RNK:r1029/2004 8. Non -Discrimination. During the performance of this Agreement, the ENGINEER shall not discriminate against any employee or applicants for employment because of race, color, creed, religion, national origin, sex, sexual orientation, marital status, status with regard to public assistance, disability, or age. The ENGINEER shall post in places available to employees and applicants for employment, notices setting forth the provisions of this non-discrimination clause and stating that all qualified applicants will receive consideration for employment. The ENGINEER shall incorporate the foregoing requirements of this paragraph in all of its subcontracts for program work, and will require all of its subcontractors for such work to incorporate such requirements in all subcontracts for program work. 9. Assignment. Neither party shall assign this Agreement, nor any interest arising herein, without the written consent of the other party. 10. Indemnification. The ENGINEER agrees, to the fullest extent permitted by law, to indemnify and hold CITY harmless from any damage, liability, or cost (including reasonable attorney's fees and costs of defense) to the extent caused by ENGINEER'S negligent acts, errors, or omissions in the performance of professional services under this Agreement and those of his or her subcontractors or anyone for whom the ENGINEER is liable. 11. Insurance. # �100 ,o�000 A. General Liability. During the term of this Agreement, ENGINEER shall maintain a general liability insurance policy with limits of at least for each person, and each occurrence, for both personal injury and property damage. This policy shall name the CITY as an additional insured for the services provided under this Agreement and shall provide that the ENGINEER'S coverage shall be the primary coverage in the event of a loss. The policy shall also insure the indemnification obligation contained in Paragraph No. 10. B. Worker's Compensation. The ENGINEER shall secure and maintain such insurance as will protect ENGINEER from claims under the Worker's Compensation Acts and from claims for bodily injury, death, or property damage which may arise from the performance of ENGINEER'S services under this Agreement. C. Professional Liability Insurance. The ENGINEER shall secure and maintain a professional liability insurance policy. Said policy shall insure payment of damages for legal liability arising out of the performance of professional services for the CITY, in the insured's capacity as ENGINEER, if such legal liability is caused by an error, omission, or negligent act of the insured or any person or organization for whom the insured is legally liable. Said policy shall 113878v11 4 RNK:r10/29/2004 I,I�ou,00D C y� provide minimum limits of $2 99A 9� with a deductible maximum of D. Certificate of Insurance. A certificate of insurance on a form acceptable to the CITY which verifies the existence of this insurance coverage must be provided to the CITY before work under this Agreement is begun. The certificate shall provide that such insurance cannot be cancelled until 30 days after the CITY has received written notice of the insurer's intention to cancel the insurance. 12. Records Access. The ENGINEER shall provide the CITY access to any books, documents, papers, and record which are directly pertinent to the specific contract, for the purpose of making audit, examination, excerpts, and transcriptions, for three years after final payments and all other pending matters related to this Agreement are closed. 13. Data Privacy. The ENGINEER shall comply with the Minnesota Statutes Chapter 13, The Minnesota Government Data Practice Act. The ENGINEER shall not disclose non-public information except as authorized by the Act. 14. Ownership of Documents All plans, diagrams, analyses, reports, and information generated in connection with performance of the agreement shall become the property of the CITY. The CITY may use the information for its purposes. 15. Governing Law. This Agreement shall be controlled by the laws of the State of Minnesota. 16. Permits. ENGINEER shall obtain all necessary permits required for completion of ENGINEER'S services. Executed as of the day and year first written above. CITY OF CHANHASSEN AN AND 0 Gerhardt, City SHORT-ELLIOTT-HENDRICKSON INC. I13878v11 5 RNK:rIG129/2004 By�' Cu /Its 113878A1 6 RNK:r10/29/2004 fI: �Yi I "-21 ce • 4 Haak, Lori From: Haak, Lori Sent: Monday, November 29, 2004 3:54 PM To: Paul Haik (phaik@haik.com) Cc: Bob Obermeyer Subject: Lake Riley Basic Water Management Project Notice Good afternoon, Paul -- I've received several calls already today regarding the notice sent by the District to property owners most directly affected by the alum treatments on Rice Marsh and Riley Lakes. Most are very concerned about the levy amounts laid out in the notice. I understand from talking to Leslie Stowing at Eden Prairie that the projects won't affect existing levy amounts. However, I am not the most appropriate person to address their concerns, so I have been sending them on to Bob so he can explain the District's funding mechanisms. In the best interest of the District and both cities involved, there are several things that would have helped things go more smoothly. First, it can be unnerving for property owners to be served a notice (or receive notice in the mail) that indicates you may be assessed by an entity of which you were previously unaware. For many of our City projects with regional and financial impacts to residents, we find that an informal workshop prior to the public hearing can answer a majority of the questions that might come up and diffuse some issues ... or at least allow us to do some research on questions that remain after the workshop before the public hearing. Additionally, it would have been appropriate to include a contact name and number for affected parties to contact with questions. Again, neither Leslie nor myself are equipped to provide more detailed information. 1 hope that we can continue to improve the communication with the residents of the District throughout the course of this project so that they can be advocates for the entities involved and the projects we complete in the interest of preserving and protecting our water resources. Feel free to contact me if you have questions Thanks! Lori Haak Water Resources Coordinator City of Chanhassen 7700 Market Boulevard P.O. Box 147 Chanhassen, MN 55317 Phone: 952.227.1135 Fax: 952.227.1935 Email: IhaakO ci.chanhassen.mn.us Engineer's Report Lake Riley Water Quality Improvement Project (Lake Riley and Rice Marsh Lake) Petitioned by the Cities of Chanhassen and Eden Prairie Prepared for the Riley -Purgatory -Bluff Creek Watershed District May 5, 2004 Engineer's Report Lake Riley Water Quality Improvement Project (Lake Riley and Rice Marsh Lake) Petitioned by the Cities of Chanhassen and Eden Prairie Prepared for the Riley -Purgatory -Bluff Creek Watershed District May 5, 2004 4700 West 7Rh Min Minneapolis, MNN 354 55435 Phone: (952) 832-2600 BARR Fax: (952) 832-2601 Engineer's Report Lake Riley Water Quality Improvement Project (Lake Riley and Rice Marsh Lake) Riley -Purgatory Bluff Creek Watershed District: Basic Water Management Project Table of Contents 1.0 Introduction............................................................................................................................... 1 2.0 Background Information............................................................................................................ 2 3.0 Description of Project Lakes and Watersheds............................................................................. 3 3.1 Lake Riley........................................................................................................................3 3.2 Rice Marsh Lake............................................................................................................... 3 4.0 Proposed Improvement Plan.....................................................................................................13 4.1 Rice Marsh Lake............................................................................................................. 13 4.2 Lake Riley...................................................................................................................... 15 4.3 Cost Estimate.................................................................................................................. 17 4.3.1 Rice Marsh Lake.................................................................................................. 17 4.3.2 Lake Riley........................................................................................................... 17 4.4 Permits........................................................................................................................... 18 4.5 Affected Property Owners............................................................................................... 18 5.0 Impacts Caused by the Project..................................................................................................19 6.0 Recommendations....................................................................................................................20 References.......................................................................................................................................21 PA23\27\EWRiley and Rice Marsh Lakes Engineers Report May 2004)..DOC 1 List of Tables Table I Riley -Purgatory -Bluff Creek Watershed District Lake Management Table .............................. Table 2 Estimated Water Quality Conditions (TSIso ) for Lake Riley and Rice Marsh Lake, Assuming Current (1998) and Ultimate Watershed Land Use Conditions, Varying Climatic Conditions (Average, Wet and Dry Precipitation Years), and Current District Runoff Management Rule - Mandated Stormwater Detention Only.................................................................................... Table 3 Predicted Lake Water Quality Conditions (TSIsn) Following Project Implementation ............. List of Figures 11 19 Figure1 Lake Riley Watershed....................................................................................................................4 Figure 2 Lake Riley and Rice Marsh Lake Total Phosphorus-1971 through 2002........................................8 Figure 3 Lake Riley and Rice Marsh Lake Watersheds Land Uses Under Existing (1997) Land Use .............9 Figure 4 Lake Riley and Rice Marsh Lake Watersheds Under Future Land Use..........................................10 Figure 5 Phosphorus Release Rates from the Anoxic Sediments of Rice Marsh Lake..................................14 Figure 6 Lake Riley and Rice Marsh Lake Proposed Treatment Pond Locations.........................................16 List of Appendices Appendix A Project Petitions from Eden Prairie and Chanhassen Appendix B Lake Riley UAA Executive Summary Appendix C Report on Paleolimnological Analyses of Rice Marsh Lake Sediments by Dr. Daniel R. Engstrom of the St. Croix Watershed Research Station Appendix D Affected Property Owners PA23\27TE61Vii1ey and Rice Marsh Lakes En.gineers Report May 2004)..DOC ii 1.0 Introduction This report summarizes the proposed actions for improving the water quality of two lakes in the cities of Chanhassen and Eden Prairie, including: • Lake Riley • Rice Marsh Lake It is prepared in accordance with Section 103D.711 of the Minnesota Watershed Act under the direction of the Board of Managers of the Riley -Purgatory -Bluff Creek Watershed District, upon petition by the cities of Chanhassen and Eden Prairie (see Appendix A). P:\23\27\E61\Riley and Rice Marsh takes Engineers Report May 2004)..DOC I 2.0 Background Information The Riley -Purgatory -Bluff Creek Watershed District (District) was established by the Minnesota Water Resources Board in 1969, acting under authority of the Watershed Law. As charged by the law and the order establishing the District, the general purpose of the District is to protect public health and welfare and to provide for the provident use of natural resources. The District carries out these purposes through planning, permit issuance, flood control, and conservation projects. The District is located in the southwestern portion of the Twin Cities Metropolitan Area, encompassing an area of 47.3 square miles. There are three major subwatersheds within the District —Riley Creek, with a watershed area of 10.0 square miles; Purgatory Creek, with a water area of 31.4 square miles; and Bluff Creek, with a watershed area of 5.9 square miles. All three creeks discharge to the Minnesota River. Stormwater management within the urbanizing watershed was guided initially by the District's Overall Plan dated 1973. The 1973 Overall Plan guided development within District until it was further revised in May 1996 (Water Management Plan in accordance with the Metropolitan Surface Water Management Act and Watershed Law: Minnesota Statutes Chapters 103B and 103D, respectively. The water quality improvement projects recommended in this Engineer's Report for Lake Riley and Rice Marsh Lake are the outcome of Use Attainability Analyses (UAA) prescribed by the 1996 Riley -Purgatory -Bluff Creek Watershed District Water Management Plan, and conducted during the 1998-2002 period (see Appendix B). PA23\27\E61 Miley and Rice Marsh lakes Engineers Repon May 2004)..DOC 2 1 1 3.0 Description of Proiect Lakes and Watersheds The UAA for Lake Riley and Rice Marsh Lake (Figure 1) were completed to provide the scientific foundation for lake -specific management plans that will preserve existing —or achieve potential — beneficial uses of the lakes. The UAA is a structured, scientific assessment of the factors affecting attainment of a beneficial use, both currently and under ultimate watershed development conditions. "Use Attainment" refers to achievement of water quality conditions suitable to support lake -specific beneficial uses such as swimming, fishing, wildlife habitat, and esthetic viewing among others, as designated in the 1996 Water Management Plan. 3.1 Lake Riley Lake Riley is designated as a Level I "swimming lake" by the District (see Table 1) and, as such, its water quality condition should score 53, or less, on the Carlson's Trophic State Index (Secchi disc basis, TSIsD) rating system. This index score is calculated from the interrelationships between summer Secchi disc transparencies and epilimnetic concentrations of chlorophyll a and total phosphorus. (The index results in scoring generally in the between zero and one hundred; lower score being indicative of better lake water quality.) A TSIsD score of 53 corresponds to a total phosphorus concentration of 40 µg/L for lakes in the Central Hardwood Forests ecoregion of Minnesota. (MPCA. 1997. Lake Prioritization for Protecting Swimmable Use.) ' 3.2 Rice Marsh Lake I 1 1 1 Rice Marsh Lake has been designated as a "fishing lake" by the District despite the fact that the Minnesota Department of Natural Resources (Mn/DNR) does not actively manage the lake by stocking it. As such a "fishing" resource, Rice Marsh Lake has a water quality goal of TSIsD a 62, which corresponds to the water transparency criterion for the Ecological Use Classification set by the Mn/DNR for lake fisheries and associated aquatic communities in Rice Marsh Lake (Schupp, D., 1992. An Ecological Classification of Minnesota Lakes with Associated Fish Communities. Mn/DNR Investigational Report No. 417.) This TSIsD score corresponds to a total phosphorus concentration in the range of 84 to 188 µg/L, similar to the District's total phosphorus concentration range goal of 75 to 105 µg/L for Level III fishing lakes (supporting fish and wildlife populations, and provide aesthetic viewing). PA23\27\E61\Ri1ey and Rice Marsh takes Engineers Report May 2004)..DOC I IJ I I Seven County Metro Area r RILEY PURGATORY — BLUFF CREEK WATERSHED DISTRICT `/Rice •v' Lake Marsh•. Labe ` •,Riley Q 0 4000 8000 Scale in Feet ' ® Areas Not contributing to Surface Water Drainage 35W Figure 1 LAKE RILEY WATERSHED IJ Table 1 Riley -Purgatory -Bluff Creek Watershed District Lake Management Table: Water Quality, Recreational Use and Ecological Classification of, and Management Philosophies for Minnetonka Lakes, Referencing Carlson's Trophic State Index (TSI) Values (Secchi Disc Transparency Basis) Lake Classification, By Regulatory Agency Current Water MPCA* Metro Council District Quality Conditions Swimmable Priority Waters Mn/DNR' Ecological Management Lake (TSIsD)' District Water Quality Goal Use Class Class Municipal U9e3 Class` Strategy Riley Yearof Record = 2002 TSIsD < 53 III 2 RD 24 Full Support TP = 47 pg/L Partially- Multi -use Swim Primary Fish Species: of Swimming and Chia = 40 pg/L Supporting Recreational NP, BLB, BG Designated SD = 1.4 m TSIsD < 56 Fishing TSIsD = 55 Activities Rice Marsh Year of Record = 1997 TSIsD =_ 62 Unspecified 3 NE 42 Full support of TP = 153 pg/L Single -Use Fish Primary Fish Species: fishing plus waterfowl and Chia = 81 pg/L Recreational WS, BLB, BG wildlife habitat SD = 0.5 in requirements. TSIsD = 70 TSIsD Carlson's Trophic State Index score. This index was developed from the interrelationships between summer Secchi disc transparencies and epilimnetic concentrations of chlorophyll a and total phosphorus. The index results in scoring generally in the range between zero and one hundred. [District values calculated by Barr Engineering Company (from field data and water quality model predictions). MPCA values taken from the 1994 Clean Water Act Report to the U.S. Congress; and Mn/DNR values taken from Schupp (1992) Minnesota Department of Natural Resources Investigation Report No. 417. An ecological classification of Minnesota lakes with associated fish communities.] 'MPCA = Full supports of swimmable use. II = Full support of swimmable use, but threatened. III = Partial support of swimmable use. IV = Non-support of swimmable. ::ODM A\PCDOCS\DOCS\241305\ I � � � � � IIIIIII■ � � � lllllll■ � � � � � � � Table 1 (Cont.) Riley -Purgatory -Bluff Creek Watershed District Lake Management Table: Water Quality, Recreational Use and Ecological Classification of, and Management Philosophies for Minnetonka Lakes, Referencing Carlson's Trophic State Index (TSI) Values (Secchi Disc Transparency Basis) 'City SWIM = Public swimming beach FISH = Designated fishing resource 'Mn/DNR Mn/DNR Shoreland and Management Classification System: NE = Natural Environment RD = Recreational Development GD = General Development Lake rn Lake Classes 24, 30 and 32 are good permanent fish lakes. Class 38 may be subject to occasional winterkill winterkill frequently Classes 42 and 43 may be better suited for wildlife than for fish. NP = Northern Pike WS = White Sucker CA = Carp BG = Bluegill BG = Bluegill YB = Yellow Bullhead BLB = Black Bullhead Classes 42 and 43 are marginal fish lakes, and may BLB - Bullhead *Mn/DNR and MPCA TSI scores were provided by those agencies without evaluation by District. The MDNR TSIso score represents the third quartile transparency condition of the Ecological Class 4 lakes evaluated. ::ODMA\PCDOCS\DOCS\241305\I The current summer average total phosphorous concentration of Rice Marsh Lake is approximately 150 µg/L, down from an observed peak of 710 µg/L: in 1972 (see Figure 2), shortly after the cessation of domestic wastewater discharges to the lake. Prior to that date, the lake was the receiving water for wastewater effluents from the Chanhassen municipal —and Lakeview Hills Apartment — wastewater treatment plants. Consequently, Rice Marsh Lake sediments are rich in phosphorus subject to release into the overlying lake water during summer periods of sediment anoxia. Data contained in the Lake Riley UAA demonstrate that the phosphorous concentrations of Riley Creek waters increased by a factor of approximately 3 as the creek passes through Rice Marsh Lake. This indicates that the lake sediments are acting as a `nutrient pump", resulting in an increased phosphorus load to Lake Riley. This phenomenon was also observed and reported in an earlier study conducted by the Metropolitan Council (R.A. Osgood. 1983. Diagnostic -Feasibility Study of Lake Riley, Publ. No. 10-83-095E). The summer average total phosphorus concentration of Rice Marsh Lake has declined exponentially over the past 32 years as the deposited phosphorus in its sediment have been released and flushed through the system, and as new, less fertile sediments have buried the phosphorus -rich deposits (see Figure 2). This has resulted in a generally declining phosphorus load to Lake Riley and its water quality is somewhat improved as a result. Trend analyses indicate Lake Riley total phosphorus concentrations have steadily declined over a 30-year period, from about 80 µg/L in the early-1970s to about 40 µg/L in the late-1990s. However, more recent data suggest phosphorus concentrations may now be rising as the lake's watershed is urbanizing. Figures 3 and 4 contrast the existing and predicted future watershed land uses within the portion of the Lake Riley watershed downstream from Rice Marsh Lake. As is clearly evident in Figure 4, much of the currently natural, open space will be developed into suburban residential land use. Similarly, all agricultural lands will be converted to residential land use, or lost to construction of Trunk Highway 312. Analyses of the likely impacts of watershed land use changes on in -lake water quality conditions, using sophisticated computer simulation models, suggest that change is likely. In general, under existing watershed land use conditions, Lake Riley water quality is best under near - average to dry weather (see Table 2), with TSIsD values meeting the District's goal of <53. Poorer water quality has been observed in wetter -than -normal weather years. Evaluation of historical water quality data indicated the Lake Riley summer average TSIsD exceeded the District's goal during 9 of 16 years of record. This same pattern of poorer water quality in years with relatively wet conditions is expected to persist into the future, after ultimate watershed land use development has been achieved. PA23\27\E61 Vtiley and Rice Marsh Lakes Engineers Report May 2004)..DOC Figure 2 Lake Riley and Rice Marsh Lake Total Phosphorus-1971 through 2002 800 T— L 700 + 600 500 rn r n 400 + 2 I 0 300 200 - 100 L0 —1 1965 1970 1975 1980 1985 Year 1990 1995 2000 - 4 — Lake Riley — — -Rice Marsh Lake -- Lake Riley Trend(1971-2002) Rice Marsh Lake Trend (1972-1999 2005 7131 /2003 1 :54 PM P:\23\27\E61 \RI LEYTRE_EngrReportxls Ij ,\ ♦� `., � it «�.. f 1 - v _ a ' _ �s''�. fps a` a�,y' - - � a �� �' %I �... ✓i•tr - + i t H _ R�. f` � .tee �_. � ' ` yS. 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ASS T u Vim. f + �.�,� � `f, s. tf `-6Y`' a� r s R�, •t .y .t ri•� Ef � � ' Table 2 Estimated Water Quality Conditions (TSIsn) for Lake Riley and Rice Marsh ' Lake, Assuming Current (1998) and Ultimate Watershed Land Use Conditions, Varying Climatic Conditions (Average, Wet and Dry Precipitation Years), and Current District Runoff Management Rule - Mandated Stormwater Detention Only. Trophic State Index (TSIsn ) Value Average Year Wet Year Dry Year Watershed (1995 27-Inch (1983,41-Inch (1988,19-inch Lake Land Use District Goal Precipitation) Precipitation) Precipitation) Riley Current (1998) <53 53 64 49 Ultimate <53 51 52 50 Rice Marsh Current (1998) __ 62 77 77 79 Ultimate - 62 77 77 79 1 PA23\27\E61Uti1ey and Rice Marsh Lakes Engineers Report May 2004)..DOC 1 I 1 1 1 1 1 1 IJ Surprisingly, however, future Lake Riley water quality is predicted to be generally improved, presumably because agricultural lands without runoff water quality controls will be replaced by suburban residential and highway land uses that include runoff detention ponds, per current District runoff management rules. This is expected to result in a net decrease in phosphorus loading of the lake from watershed runoff. Loads will still be highest, and in -lake water quality poorest, during relatively wet years Although we predict the District's water quality goal (TSIsD c53) will be met, albeit minimally, under the wet -year (1983) weather conditions assumed in the UAA water quality modeling, more extreme conditions could result in non -attainment of the goal under ultimate watershed land use conditions, unless remedial measures are undertaken. Rice Marsh Lake water quality (TSIsD = 70) currently fails to meet the Riley -Purgatory -Bluff Creek Watershed District goal of TSIsD =_ 62, and its predicted to degrade somewhat (TSIsD_ 77) as the lake's watershed approaches ultimate land use. Poorest Rice Marsh Lake water quality conditions are expected to occur in relatively dry years when less of the phosphorus recycled from anoxic lake sediments is flushed out into Lake Riley. P:Q3U7\E61Utiley and Rice Marsh Lakes. Engineers Report May 2004)..DOC 12 1 4.0 Proposed Improvement Plan The UAA report contained in Appendix B of this Engineer's Report details the Improvement Plan ' summarized here. The Lake Riley Water Quality Improvement Project is comprised of the following management actions, both watershed and in -lake, as described below, by water body. ' 4.1 Rice Marsh Lake ' • Treat Rice Marsh sediments with a combination of aluminum sulfate (i.e., alum, Al2(SO4)3 n H2O) and calcium hydroxide (i.e., lime, Ca(OH)2) to immobilize potentially releasable phosphorus. Treatment is to be made at an areal dose rate (g/m2) dependent on the ' results of analyses of sediment cores for levels of labile (i.e., loosely bound) and iron -bound phosphorus in surficial deposits (E. Rydin and E.B. Welch. 1998. Aluminum Dose Required ' to Inactive Phosphate in Lake Sediments. Water Res. 32(1):2969-2076). Since this Engineer's Report was fast drafted (July 2003), considerable additional effort has been put forth to justify the recommendation to treat Rice Marsh Lake sediments to control recycle of sediment -bound phosphorus to the water column. Phosphorus release rate experiments for anoxic sediments of Rice Marsh Lake conducted during 1988 were repeated ' in 2004 to determine if extremely high rates still persisted. Figure 5 charts compare results from the two experiments. The rate observed in 2004 (21.5 mg P/m2 day) is only slightly less than the corresponding rate observed in 1988 (24.0 mg P/m2 day), and is still approximately 1 1 1 double the rate one would expect to see in eutrophic lakes of southern Minnesota (10 to 15 mg P/m2 day) where domestic wastewater inputs had not occurred. Although anoxic sediment phosphorus release appears to be slowly declining naturally (due to a combination of release, flushing, and burial), a return to conditions that predate wastewater discharges to Rice Marsh Lake would likely take decades to occur, without some intervention (e.g. alum treatment). Conclusions drawn from the results of anoxic sediment phosphorus release experiments conducted in sediment -water microcosms were confirmed by more sophisticated paleolimnological analyses conducted by Dr. Daniel Engstrom of the St. Croix Watershed Research station. His report on Rice Marsh Lake sediment core analyses are presented in Appendix C of this report. • In cooperation with the Mn/DNR, construct rough fish barriers (2) between Rice Marsh Lake and Lakes Riley and Susan. The Mn/DNR hopes to isolate carp in Rice Marsh Lake where they will be subject to winterkill. If this is not effective, they will consider making a chemical treatment (e.g., rotenone) to remove rough fish at some later date. P:\23\27\E61 \Riley and Rice Marsh takes Engineers Report May 2004)..DOC 13 1 ' 3.5 3.0 v m rn 2.0 >1 m lop 0.5 Figure 5 Phosphorus Release Rates from the Anoxic Sediments of Rice Marsh Lake a. 1988 i 0"-6" CORE: 24.0 mg P/m"day ' I 12"-18" CORE: 17.7 mg P/m"day ♦ 0.0 0 2 4 6 8 10 12 14 Incubation Time (days) t Microcosm 0-6"Rice Marsh Lake (1988 Sample) � Microcosm 12-18"Rice Marsh Lake (1988 Sample) 3.5 3.0 CL im 2.5 E c m E v m rn cl 2.0 T 0 lop 0 1.0 H b. 2004 ♦ ♦ ♦ I ♦ I ♦ 0"-6" CORE: 21.5 mg P/m"day ♦ 0.0 0 2 4 6 8 10 12 14 Incubation Time (days) —Microcosm 0-6"Rice Marsh Lake (2004 Sample) 5/5/2004 1231271E61V2iceMarsh Lake P Release SAS-3- 11:04 AM 4.2 Lake Riley ' • Treat Lake Riley with a combination of alum -plus -lime in a manner similar to that described above for Rice Marsh Lake. ' • In cooperation with Minnesota Department of Transportation (Mn/DOT), design and construct four or five runoff detention ponds that meet MPCA and NURP design guidelines ' to treat runoff from the planned Trunk Highway 312.. Locations of these runoff detention ponds are shown on the Figure 6. ' P:\23\27\E61Utiley and Rice Marsh Lakes Engineers Report May 2004)..DOC 15 ,`+rj + .♦ ,� +i' ♦ r F k � 1i1r°�' '��� •" 91 �: t •� a1r{M.4Fp+. .�.1 II ^�' l; J iyt¢r. -w , S �+�i.-C. • ;.yy. ,w +�'r, ram+ ,,...ru. • ;' \ ,`77, r } a +I` r f J.. ^.f u'r'r �a .+; ♦ar F y / ' ..yn ' ram, `� ^ �•' ♦ S •_,r .,,`S �y ;� r V�Y9g lr �" i i ♦ y r 'r . + b j F 1, ♦ �r . 1 oil .� ��yAN • '— ( ;� '� • r� + 7 - �r .r. r r 'f s x� F" �^..♦ p L.(i:--..v��t��, i 1- F 1. 2 It" -rt , RM-244 ,[ '1 � {` M_ g♦'I }-. �� x R11-7t1, tit • ' �I +,.r � . - r S.tS:..* .ate] �,'-`/' '�ir _ •� li�l-I.? c r� .s ry �'!♦, +"1'. j , +t' A '5- ' RM ,3 / Fringe Wetland q� �} �Q+ Lake Susan Rice Marsh I. `i .. *11� 1 RM-3.10 ►# an 1 r ,,, - R 1 a► !�% R 22a q 3 l :. d+ r t'J'.03: 5 43: 5 3b-S 9gQQ9 1 i y .31 ,L'` �1 i. K'r + ,G" i{ti""_ \< <.. r� .. r• t* " vs `� a+ ' .♦ y99.22-M 4d y_ Flr 999.32 R � yr.�;� 31 t \tl • ' 999: �5 Y 3 6.11 LIX r. r ,.1 1 + , ' Lake Riley �+ 7.01 yE* • 1 11' 0.01 r �. T,1 f, re 1 2qqjj 8.2 —r b fit., 10 'ar„ y_ I• 1 ,a � �I � � • ✓1• 1t ).'t\•`I, �`b't • '� H I, f ,a. a. i ♦ a J p • •!yam - � i J M. 1 4.3 Cost Estimate ' The aggregate cost of the recommended improvements described in this Engineer's Report is $1,624,000. This total is comprised of the following subtotal elements: 4.3.1 Rice Marsh Lake 1 Alum-plus-limetreatment...................................................................................... $120,000 Rough fish barriers (2) between Rice Marsh Lake and Lakes Riley and Susan ....... 150,000 ' Pond RM2.1..............................................................................................................18,500 PondRM2.2.............................................................................................................. 16,500 Pond RM2.4.............................................................................................................. 24,500 ' PondR.M.2.6............................................................................................................24,000 PondR.M.6.5.......................................................................................................... 240,000 Pond R.M.1.1.......................................................................................................... 290,500 ' PondR.M.2.5............................................................................................................72,000 PondR.M.2.8............................................................................................................ 80,500 Pond R.M.6.9..................................................................................................... $ 184,000 ' Subtotal .......... $1,220,500 ' 4.3.2 Lake Riley Alum -Plus -Lime Treatment................................................................................... $200,000 ' Pond4.11a............................................................................................................. $ 55,500 Pond4.13a................................................................................................................ 23,000 Pond 5.22a..................................................................................................................5,500 ' Pond 5.22a/5.23a.......................................................................................................40,000 Pond999.16a...................................................................................................... $ 79,500 Subtotal .......... $ 403,500 Grand Total ................................... $1,624,000 ' The alum -plus -lime treatments of Lake Riley and Rice Marsh Lake may be undertaken immediately, depending on regulatory agency review of permit applications. Rough fish barriers above and below ' Rice Marsh Lake will be constructed as soon as possible thereafter, in coordination with Mn/DOT highway construction. Construction of Trunk Highway 312 runoff detention ponds will be done in ' cooperation with Mn/DOT as the highway is constructed. ' P123\27\E61Uti1ey and Rice Marsh takes Engineers Report May 2004)..DOC 17 1 4.4 Permits 1 Permits for the recommended improvements will be required by the cities of Chanhassen and Eden Prairie, the Riley -Purgatory -Bluff Creek Watershed District, the Minnesota Department of Natural 1 Resources, and the Minnesota Pollution Control Agency. 1 4.5 Affected Property Owners Owners of the properties potentially affected by the recommended improvements are listed in 1 Appendix D. 1 1 1 1 1 1 1 d 1 1 1 P:\23\2TE61Viiley and Rice Marsh takes Engineers Report May 2004)..DOC 18 1 5.0 Impacts Caused by the Project No long-term adverse impacts to natural resources are expected to result from implementation of the recommended improvements. Some temporary construction -related impacts may occur to riparian wetlands, and mitigation may be required, but impacts are generally expected to be minor. Every effort possible will be made to avoid or minimize tree loss in connection with various aspects of the recommended projects. Trees that are unavoidably lost will be replaced, at the landowner's discretion. Expected benefits of completing the petitioned project are summarized, in terms of TSIsn values, in the following table (Table 3), which presents summer average water quality condition estimates (from P8/In-Lake modeling). These predictions assume all elements of the recommended water quality improvement plan are implemented as described in the Lake Riley UAA report (Appendix B). Table 3 Predicted Lake Water Quality Conditions (TSIsn) Following Project Implementation Tro hic State Index (TSIsn) Value Recently Observed Average Year Wet Year Dry Year Watershed Conditions District (1995 27-Inch (1983, 41-Inch (1988, 19-inch Lake Land Use (Yr. of Record) Goal Precipitation) Preci itation) Precipitation) Riley Current(1998) 55 (2002) < 53 39 39 38 Ultimate 39 40 44 Rice Marsh Clurent(1998) 77 =_ 62 65 65 71 Ultimate 65 65 71 (1997) The result of the petitioned project will be improved Lake Riley water quality to a point where it consistently meets its goal, now and in future. Rice Marsh Lake water quality will also be improved, but is expected only to approach its RPBCWD goal. PA23\27\E61\Ri1ey and Rice Marsh Lakes Engineers Report May 2004)..DOC 19 1 6.0 Recommendations The Lake Riley Water Quality Improvement Project is a necessary and feasible part of the Overall Water Management Plan of the Riley -Purgatory -Bluff Creek Watershed District. The cities of Chanhassen and Eden Prairie have petitioned the District to undertake this work on a cooperative basis (see Appendix A). Because the project meets water quality management goals of the District without causing adverse impacts on natural resources of the area, it is recommended that the project be implemented as is generally described in this Engineer's Report. As plans and specifications for the recommended project elements are prepared, the District will consult with City staffs about plan details. City Engineering and Mn/DNR staff will be given draft plans for their review, comment and approval before a District public hearing on the project is held. Although the runoff detention ponding portion of the project is a "Structural" BMP, the District encourages the use of Low Impact Development (LID) BMPs (e.g., infiltration of runoff), wherever feasible, and will work with Mn/DOT to promote the use and incorporation of LID BMPs into final Trunk Highway 312 design plans, wherever possible. ' P:\23\27\E61Utiley and Rice Marsh takes Engineers Report May 2004)..DOC c II References Barr Engineering Co. 1973 Overall Water Management Plan of the Riley -Purgatory -Bluff Creek Watershed District. Prepared for Riley Purgatory -Bluff Creek Watershed District. Barr Engineering Co. 1996. Water Management Plan. Prepared for Riley Purgatory -Bluff Creek Watershed District. Barr Engineering Co. 2002. Lake Riley Use Attainability Analysis. Prepared for Riley Purgatory - Bluff Creek Watershed District. Barr Engineering Co. 1999. Rice Marsh Lake Use Attainability Analysis. Prepared for Riley Purgatory -Bluff Creek Watershed District. Minnesota Pollution Control Agency. 1997. Lake Prioritization for Protecting Swimmable Use. see page 3 Schupp, D. H. 1992. An Ecological Classification of Minnesota Lakes With Associated Fish Communities. Investigational Report 417, 1992. Minnesota Department of Natural Resources. PA23U71E61\Ri1ey and Rice Marsh takes. Engineers Report May 2004)..DOC 21 I 1 1 1 I I 1 1 n I 'J 1 Appendix A Project Petitions from Eden Prairie and Chanhassen MY OF CEMSEN 7700 Market Boulevard PC Box 147 Chanhassen, MN 55317 Administration Phcne:952,227.1100 Fax: 952.227.1110 Building Inspections Phone: 952.227.1180 Fax: 952,227.1190 Engineering Phone: 952.227.1150 Fax: 952,227.1170 Finance Phone:952,227,1140 Fax 952.227.1110 Park & Recreation Phone: 952.227.1120 Fax. 952.227.1110 Recreation Center 2310 Coulter Boulevard Phone. 952227.1400 Fax: 952.227.1404 Planning & Natural Resources Phone. 952.227.1130 Fax: 952 227.1110 Public Works 1591 Park Road Phone: 952,227.1300 Fax:952.227.1310 Senior Center Phone:952227.1125 Fax: 952.227.1110 Web Site wwwbehanhassennn.us January 21, 2003 Riley Purgatory Bluff Creek Watershed District c/o Mr. Robert Obermeyer Barr Engineering 4700 West 77d' Street Minneapolis, MN 55435 Re: Petition Regarding Lake Riley and Rice Marsh Lake Basic Water Management Projects Dear District Managers and Mr. Obermeyer: Enclosed please find the fully executed petition for the above projects. Please note that the cost to the City may not exceed $100,000 unless prior written approval is obtained from the City. If you have questions or require additional information, feel free to contact me at 952.227.1135. I look forward to working with you on these projects. Sincerely, // CITY OF CHANHASSEN V f Lon Haak Water Resources Coordinator GAENG\LoriWU MgmVRileNPetition Cover Utter.doc The City of Chanhassen • A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A goat place to live, work, and play. PETITION OF THE CITY OF CHANHASSEN TO RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT FOR THE LAKE RILEY AND RICE MARSH LAKE BASIC WATER MANAGEMENT PROJECTS Gliy��1�7 �r'i The City of Chanhassen petitions the Riley Purgatory Bluff Creek Watershed District, pursuant to the provisions of the Minnesota Statutes Sections 103D.201, 103D.605, 103D.705, and 103D.905, to undertake a basic water management project to protect and improve the water quality in Lake Riley and Rice Marsh Lake. II. PURPOSE The purpose of the project is to improve the water quality of Lake Riley by reducing internal and external sources of phosphorus in and to the lake that contribute to alga growth, resulting in decreased water quality, clarity and transparency. The Minnesota Board of Water and Soil Resources approved and the Riley Purgatory Bluff Creek Watershed District Board of Managers adopted a watershed management plan that assessed the condition of the lake through determination of its physical, chemical and biological qualities. The approved and adopted watershed management plan dated May 1996 is incorporated by reference. This project in the cities of Chanhassen and Eden Prairie will help remedy water quality t impacts from: 1) municipal sewage treatment discharges that were made to Rice Marsh Lake through the early 1970s; 2) future construction of T.H. 312 between Lake Riley and Rice Marsh Lake; and 3) increased urbanization within the watershed. The Lake Riley and Rice ' Marsh Lake Use Attainability Analyses dated April 2002 and November 1999 respectively are incorporated by reference. III. GENERAL DESCRIPTION OF WORK PROPOSED AND PURPOSES The project proposes application of alum -plus -lime treatments and storm water management improvements to improve the water quality of the Lake Riley and Rice Marsh Lake. Application of the alum -plus -lime treatments will remediate prior municipal sewage treatment discharges, while the storm water management improvements will limit impacts from the highway construction and increased urbanization within the lake watershed. Through 1972, the City of Chanhassen discharged treated sewage wastewater into Rice Marsh Lake, resulting in high phosphorus levels within the sediments on the bottom of the lake. Although wastewater discharges were discontinued, the excess phosphorus from years of discharge continues to degrade the water quality of Lake Riley via flows from Riley Creek. Approximately 54% of the phosphorus entering Lake Riley flows from Rice Marsh Lake through Riley Creek. Phosphorus recycled from Rice Marsh Lake sediments into Riley Creek waters is a major contributor the phosphorus draining into Lake Riley. Proposed water quality improvements are expected to reduce the phosphorus recycled from lake sediments to the overlying lake water that would otherwise support alga growth or blooms. Within the City of Chanhassen, the project includes a proposal to treat Lake Riley and Rice Marsh Lake with an alum -plus -lime slurry. The proposal also calls for upgrading five (5) existing storm water management basins and the construction of four (4) new storm water basins. The new and upgraded basins will conform to the standards for the National Urban Runoff Ponding Basins and the requirements of the Minnesota Pollution Control Agency. ' Petition of the City of Chanhassen of Riley -Purgatory -Bluff Creek Watershed District Riley and Rice Marsh Lake Basic Water Management Projects ' January 2003 Page 2 of 3 ' Overall the project will increase the recreational use of swimming in Lake Riley by reducing the phosphorous loads to the lake thereby limiting the number of days the actual water quality exceeds the standard for recreational swimming. This is a Trophic State Index (TSI) of 53 (<40 mg/1) which is the guidance published by the Minnesota Pollution Control ' Agency to assess full support for primary contact recreation and aesthetics. The project intends continued monitoring and re-evaluation of the effect of constructing the ' proposed improvements for the purpose of determining whether additional controls are required. The proposed work is consistent with additional controls, if required to maintain the existing beneficial uses of Riley and Rice Marsh Lakes. ' IV. DESCRIPTION OF THE LANDS OVER WHICH THE PROPOSED IMPROVEMENTS ARE LOCATED ' The project will be located on property that is directly or indirectly tributary to Lake Riley, Rice Marsh Lake and Riley Creek that is located on the eastern and western boundaries of Chanhassen and Eden Prairie respectively. Within Chanhassen, the project will be located in ' the general area west of Dell Road and east of Trunk Highway 101 between Pioneer Trail and Trunk Highway 5 in the City of Chanhassen. The improvements are described in detail in the Riley and Rice Marsh Lake Use Attainability Analyses, which are incorporated by reference. ■ V. GENERAL DESCRIMON OF THE PART OF THE DISTRICT AFFECTED The affected lands are located in the cities of Chanhassen and Eden Prairie and include the riparian and tributary drainage areas to Lake Riley, Rice Marsh Lake and Riley Creek. Generally, the affected areas are south of Trunk Highway 5, east of Trunk Highway 101, and north of Pioneer Trail. The approximate centerline of the affected property is located along the municipal boundary between Chanhassen and Eden Prairie. Rice Marsh Lake is located in the cities of Chanhassen and Eden Prairie and has a 821-acre watershed containing woodlands, marsh, residences, parks and open spaces. The lake's direct watershed consists of 378 acres of low and moderate density housing, 348 acres of parks and open space, 50 acres of industrial and 26 acres of commercial land use. Riley Creek is the outlet from Rice Marsh Lake to Lake Riley. Riley Creek has a 10 square mile watershed, with mild topography in the upper and middle portions of the watershed and a steep, north -valley wall of the Minnesota River on the downstream end of the watershed. Riley Creek originates from lakes Lucy and Ann, and flows through Lake Susan, Rice Marsh Lake and Lake Riley before it begins its descent to the Minnesota River. This project will focus on the stretch of the creek between Rice Marsh Lake and Lake Riley. Finally, Lake Riley has a direct drainage area of 818 acres consisting of 449 acres of low - density residential, 286 acres of parks and open, 1 acre of commercial, and 82 acres of agricultural property. The lake has a maximum depth of approximately 50 feet, and a mean depth of approximately 23 feet. Water flows from Rice Marsh Lake to Lake Riley through Riley Creek. Lake Riley's total drainage area, including both direct and indirect drainage, is over 4,500 acres. VI. NEED AND NECESSITY FOR THE PROPOSED IMPROVEMENT Prior years of municipal wastewater discharges to Rice Marsh Lake has deposited excessive ' Petition of the City of Chanhassen of Riley -Purgatory -Bluff Creek Watershed District Riley and Rice Marsh lake Basic Water Management Projects ' January 2003 Page 3 of 3 amounts of phosphorus that untreated will impact Lake Riley for decades. The continued development in tributary areas and the scheduled construction of T.H. 312 between Lake Riley and Rice Marsh Lake necessitates water quantity management and treatment of water quality to protect and improve the scenic, recreational and wildlife of those specific lakes and ' the overall water quality of the District. VII. THE PROPOSED IMPROVEMENT WILL BE CONDUCIVE TO THE PUBLIC ' HEALTH, CONVENIENCE AND WELFARE The City of Chanhassen petitions for the project because it will be conducive to the public health, convenience and welfare of the District and the City. Completion of the project, and ' associated recreational improvements, will preserve and enhance the public use and enjoyment of Riley and Rice Marsh Lakes and their adjacent parks, all of which are significant natural resources of the District and region. ' VIII. FINANCING OF THE PROPOSED IMPROVEMENT The project is identified in the Riley Purgatory Bluff Creek Watershed District Water Management Plan and is a priority project of common benefit to the entire District. ' Minnesota Statutes Section 103D.905, Subdivision 3 provides for the project financing of the basic water management features of the project. The District will fund 100% of the costs of the project with the exception of any easement or property acquisition. The City will share ' (75%) in the cost of the cost of any such acquisitions. The cost to the City may not exceed $100,000 unless prior written approval is obtained from the City. ' IX. PROJECT ABANDONMENT The City of Chanhassen hereby states and acknowledges that it will pay all costs and ' expenses that may be incurred by the activities described in this petition in the event the project is dismissed, no construction contract is let, or the City withdraws its project petition. 1 1 n 1 CITY OF CHANHASSEN Mayor of City of Chanhassen CITY OF CHANHASSEN City Manager 1 1 1 0 Eden 1 January 6, 2003 Prairie 8080 Mitchell Road • Eden Prairie, MN 55344-4485 • edenprairie.org • 952-949-8300 • TDD 952-949-8399 1 Mr. Bob Obermeyer Riley -Purgatory -Bluff Creek Watershed District c/o Barr Engineering 1 4700 W. 77'h Street Minneapolis, MN 55435-4803 Re: Riley and Rice Marsh Lake Basic Water Management Project Petition and Resolution Dear Mr. Obermeyer: Enclosed is a signed copy of the Petition and Resolution of the City of Eden Prairie to the Riley - Purgatory -Bluff Creek Watershed District for the Lake Riley and Rice Marsh Lake Water Management Projects. The petition and resolution include a funding request for the following items. • Upgrade of two existing stormwater ponds to meet NURP standards. • Treat each lake with an alum product to remove phosphorus from the water column. Also attached to this petition are letters of support from the Wynnfield Homeowners Association on Rice Marsh Lake and the Lake Riley Improvement Association Thank you for your assistance. CITY OF EDEN PRAIRIE HENNEPIN COUNTY, MINNESOTA RESOLUTION NO.2003-13 RESOLUTION RELATING TO THE RILEY AND RICE MARSH LAKE WATER QUALITY IMPROVEMENT PROJECTS I.C. # 03-5589 WHEREAS, Lake Riley and its tributary lake, Rice Marsh Lake, are important features within the City of Eden Prairie; and WHEREAS, the CityCouncil is committed to water qualityimprovement within Lake Riley and Rice Marsh Lake; and WHEREAS, there is a documented relationship between deteriorating water quality within Riley Lake and the historical discharge of treated sewage wastewater into Rice Marsh Lake as well as the current stormwater ponding system; and ' WHEREAS, the City of Eden Prairie has determined that improvements to the lake water quality, stormwater treatment system and fishery habitat are required to fully realize the recreational potential of the lakes. ' NOW, THEREFORE, BE IT RESOLVED, the City Council desires to complete those items recommended within the Riley and Rice Marsh Lake Use Attainability Analyses to improve ' the water quality of Lake Riley and Rice Marsh Lake and hereby approves the attached petition to the Riley -Purgatory -Bluff Creek Watershed District to: ' • Upgrade two existing stormwater ponds that do not meet NURP standards, and • Treat each lake with an alum product to remove phosphorus from the water column. ' BE IT FURTHER RESOLVED, the City Council does request that the Riley -Purgatory - Bluff Creek Watershed District participate in funding these activities with a cost share of 25 to 100% as defined in the attached petition. 1 ADOPTED by the Eden Prairie City Council January 21, 2003. e_0-, ' Ron Case, Acting Mayor ATTEST: SEAL Kathleen Porta, City Clerk ' PETITION OF THE CITY OF EDEN PRAIRIE TO ' RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT FOR THE LAKE RILEY AND RICE MARSH LAKE BASIC WATER MANAGEMENT PROJECTS ' I. AUTHORITY ' The City of Eden Prairie petitions the Riley Purgatory Bluff Creek Watershed District, pursuant to the provisions of the Minnesota Statutes Sections 103D.201, 103D.605, 103D.705, and 103D.905, to undertake a basic water management proj ect to protect and improve the water quality in Lake Riley and ' Rice Marsh Lake. H. PURPOSE ' The purpose of the project is to improve the water quality of Lake Riley by reducing internal and external sources of phosphorus in and to the lake that contribute to alga growth, resulting in decreased water quality, clarity and transparency. The Board of Water and Soil Resources approved and the Board ' of Managers adopted a watershed management plan that assessed the condition of the lake through determination of its physical, chemical, and biological qualities. The approved and adopted watershed management plan dated May 1996 is incorporated by reference. ' The proj ect for the cities of Eden Prairie and Chanhassen will help remedy water quality impacts from: 1) municipal sewage treatment discharges that were made to Rice Marsh Lake through the early 1970's; ' 2) protect against future water quality degradation from the construction of T.H. 312 between Lake Riley and Rice Marsh Lake; and 3) increased urbanization within the watershed. The Riley and Rice Marsh Lake Use Attainability Analyses dated April 2002 and November 1999 respectively are ' incorporated by reference. III. GENERAL DESCRIPTION OF WORK PROPOSED AND PURPOSES ' The project proposes application of alum -plus -lime treatments and stormwater management improvements to improve the water quality of the Lake Riley and Rice Marsh Lake. Application of the alum -plus -lime treatments will remediate prior municipal sewage treatment discharges, while the ' stormwater management improvements will limit impacts from the highway construction and increased urbanization within the lake watershed. Through 1972, the City of Chanhassen discharged treated sewage wastewater into Rice Marsh Lake, ' resulting in high phosphorus levels within the sediments on the bottom of the lake. Although wastewater discharges were discontinued, the excess phosphorus from years of discharge continues to ' degrade the water quality of Lake Riley via flows from Riley Creek. Approximately 54% of the phosphorus entering Lake Riley flows from Rice Marsh Lake through Riley Creek. Phosphorus recycled from Rice Marsh Lake sediments into Riley Creek waters is a major contributor the phosphorus draining ' into Lake Riley. Proposed water quality improvements are expected to reduce the phosphorus recycled from lake sediments to the overlying lake water that would otherwise support alga growth or blooms. Within the City of Eden Prairie, the project includes a proposal to treat Riley and Rice Marsh Lakes ' with an alum plus lime slurry. The proposal also calls for upgrading two (2) existing storm water management basins. The new and upgraded basins will conform to the standards for the National Urban tRunoff Ponding Basins and the requirements of the Minnesota Pollution Control Agency. I ' Petition of the City of Eden Prairie of Riley-Purgatory-BluffCreek Watershed District ' Riley and Rice Marsh Lake Basic Water Management Projects January 21, 2003 Page 2 of 3 ' Overall the project will increase the recreational use of swimming in Riley Lake by reducing the phosphorous loads to the lake thereby limiting the number of days the actual water quality exceeds the ' standard for recreational swimming. This is a Trophic State Index (TSI) of 53 (<40 mg/1), which is the guidance published by the Minnesota Pollution Control Agency to assess full support for primary contact recreation and aesthetics. ' The project intends continued monitoring and re-evaluation of the effect of constructing the proposed improvements for the purpose of determining whether additional controls are required. The proposed work is consistent with additional controls, if required to maintain the existing beneficial uses of Riley ' and Rice Marsh Lakes. IV. DESCRIPTION OF THE LANDS OVER WHICH THE PROPOSED IMPROVEMENTS ARE ' LOCATED The project will be located on property that is directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek that is located on the eastern and western boundaries of Chanhassen and Eden ' Prairie respectively. Within Eden Prairie, the project will be located in the general area west of Dell Road between Pioneer Trail and State Highway 5 in the City of Eden Prairie. The improvements are ' described in detail in the Riley and Rice Marsh Lake Use Attainability Analyses, which are incorporated by reference. V. GENERAL DESCRIPTION OF THE PART OF THE DISTRICT AFFECTED ' The affected lands are located in the cities of Eden Prairie and Chanhassen and include the riparian and tributary drainage areas to Lake Riley, Rice Marsh Lake, and Riley Creek. Generally, the affected areas ' are south of T.H. 5, east of T.H.101, and north of Hennepin County Road 4. The approximate centerline of the affected property is located along the municipal boundary between Chanhassen and Eden Prairie. ' Rice Marsh Lake is located in the cities of Chanhassen and Eden Prairie and has a 821-acre watershed containing woodlands, marsh, residences, parks and open spaces. The Lake's direct watershed consists of 378 acres of low and moderate density housing, 348 acres of parks and open space, 50 acres of ' industrial, and 26 acres of commercial land use. Riley Creek is the outlet from Rice Marsh Lake to Lake Riley. Riley Creek has a 10 square mile watershed, with mild topography in the upper and middle portions of the watershed and a steep, north -valley wall of the Minnesota River on the downstream end of the watershed. Riley Creek originates from lakes Lucy and Ann, and flows through Lake Susan, Rice Marsh ' Lake, and Lake Riley before it begins its descent to the Minnesota River. This project will focus on the stretch of the creek between Rice Marsh Lake and Lake Riley. Finally, Lake Riley has a direct drainage area of 818 acres consisting of 449 acres of single-family 1 1 homes, 286 acres of parks and open, 1 acre of commercial, and 82 acres of agricultural property. The lake has a maximum depth of approximately 50 feet, and a mean depth of approximately 23 feet. Water flows from Rice Marsh Lake to Lake Riley through Riley Creek. Lake Riley's total drainage area, ' including both direct and indirect drainage, is over 4,500 acres. II II Petition of the City of Eden Prairie ofRiley-Purgatory-B1uffCreek Watershed District Riley and Rice Marsh Lake Basic Water Management Projects January 21, 2003 Page 3 of 3 VI. NEED AND NECESSITY FOR THE PROPOSED IMPROVEMENT Prior years of municipal wastewater discharges to Rice Marsh Lake has deposited excessive amounts of phosphorus that untreated will impact Lake Riley for decades. The continued development in tributary areas and the scheduled construction of T.H. 312 between Lake Riley and Rice Marsh Lake necessitates water quantity management and treatment of water quality to protect and improve the scenic, recreational and wildlife of those specific lakes and the overall water quality of the District. VII. THE PROPOSED IMPROVEMENT WILL BE CONDUCIVE TO THE PUBLIC HEALTH, CONVENIENCE AND WELFARE The City of Eden Prairie petitions for the project because it will be conducive to the public health, convenience and welfare of the District and the City. Completion of the project, and associated recreational improvements, will preserve and enhance the public use and enjoyment of Riley and Rice Marsh Lakes and their adjacent parks, all of which are significant natural resources of the District and region. VIII. FINANCING OF THE PROPOSED IMPROVEMENT The project is identified in the Riley Purgatory Bluff Creek Watershed District Water Management Plan and is a priority project of common benefit to the entire District. Minnesota Statutes Section 103D.905, Subdivision 3 provides for the project financing of the basic water management features of the project. The District will fund 100% of the costs of the project with the exception of any easement or property acquisition. The City will share (75%) in the cost of the cost of any such acquisitions. DC. PROJECT ABANDONMENT The City of Eden Prairie hereby states and acknowledges that it will pay all costs and expenses that may be incurred by the activities described in this petition in the event the project is dismissed, no construction contract is let, or the City withdraws its project petition. CITY OF EDEN PRAIRIE Mayor of City of Eden Prairie CITY OF EDEN PRAIRIE City Manager Appendix B Lake Riley UAA Executive Summary ' Executive Summary Lake Riley Use Attainability Analysis ' Prepared for Riley -Purgatory -Bluff Creek Watershed District April 2002 1 I 1 I I 1 Executive Summary Lake Riley Use Attainability Analysis Prepared for Riley -Purgatory -Bluff Creek Watershed District April 2002 Minn West Street a Minneapolis,, MN 55435 Phone: (952) 832-2600 BARR Fax: (952) 832-2601 1 t Overview 1 1 1 P Executive Summ This report details the results of a Use Attainability Analysis (UAA) of Lake Riley. The UAA is a structured scientific assessment of the chemical, physical, and biological conditions in a water body. The analysis includes diagnosis of the causes of observed problems and prescription of alternative remedial measures (such as a diagnostic -feasibility study) that will result in the attainment of intended beneficial uses of Lake Riley. The analysis is based on historical water quality data, the results of an intensive 1997 through 1998 lake and watershed runoff water quality monitoring program, and computer simulations of watershed runoff, calibrated to the 1997 through 1998 data set. Computer simulations estimated watershed runoff under existing and proposed future land use conditions and under varying climatic conditions. Riley -Purgatory -Bluff Creek Watershed District Water Quality Goals The approved Riley -Purgatory -Bluff Creek Watershed District Water Management Plan, 1996, articulated five specific goals for Lake Riley. These goals address recreation, water quality, aquatic communities, water quantity, and wildlife. Wherever possible, Riley -Purgatory -Bluff Creek ' Watershed District (RPBCWD) goals for Lake Riley have been quantified using a standardized lake rating system termed Carlson's Trophic State Index (TSI). This rating system considers the lake's total phosphorus, chlorophyll a, and Secchi disc transparency measurements to assign it a water ' quality index number that reflects its general level of fertility. The resulting index values generally range between 0 and 100, with increasing values indicating more fertile conditions. ' Total phosphorus, chlorophyll a, and Secchi disc transparency are key water quality parameters upon which TSI statistics are computed, for the following reasons: ' • Phosphorus generally controls the growth of algae in lake systems. Of all the substances ' needed for biological growth, phosphorus is typically the limiting nutrient. • Chlorophyll a is the main pigment in algae. Therefore, the amount of chlorophyll a in the water indicates the abundance of algae present in the lake. ' • Secchi disc transparency is a measure of water clarity and is inversely related to the abundance of algae. ' Although any one or all three parameters can be used to compute TSI, water transparency is most ' often used, since people's perceptions of water clarity are most directly related to recreational use ::ODMA\PCDOCS\DOCS\229377U i ' impairment. The TSI rating system is scaled to place a mesotrophic (medium fertility level) lake on ' the scale between 40 and 50, and high and low fertility lakes (eutrophic and oligotrophic) toward the high and low ends of the TSI range, respectively. Characteristics of lakes in different trophic status categories are listed below with their respective TSI ranges: ' 1. Oligotrophlc—[20 < TSI < 38] clear, low productivity lakes, with total phosphorus ' concentrations less than or equal to 10 µg/L, chlorophyll a concentrations less than or equal to 2 µg/L, and Secchi disc transparencies greater than or equal to 4.6 meters (15 feet). 2. Mesotrophic—[38 < TSI < 501 intermediate productivity lakes, with 10 to 25 µg/L total ' phosphorus, 2 to 8 µg/L chlorophyll a concentrations, and Secchi disc measurements of 2 to 4.6 meters (6 to 15 feet). ' 3. Eutrophic—[50 < TSI < 62] high productivity lakes, with 25 to 57 µg/L total phosphorus, 8 to 26 µg/L chlorophyll a concentrations, and Secchi disc measurements of 0.85 to 2 meters (2.7 to 6 feet). ' 4. Hypereutrophic—[62 < TSI ] extremely productive lakes, with total phosphorus concentrations greater than 57 µg/L, chlorophyll a concentrations greater than 26 µg/I., and Secchi disc measurements less than 0.8 meters (less than 2.7 feet). ' The RPBCWD goals for Lake Riley include the following: ' 1. The Recreation Goal is to provide water quality that: (1) fully supports swimming, applying the "MPCA Use Support Classification for Swimming Relative to Carlson's Trophic State Index by Ecoregion" (i.e., a Trophic State Index (TSISD) of 53 or lower) and, (2) achieves a ' water quality that fully supports the lake's MDNR ecological class 24 rating (i.e., a Trophic State Index (TSISD) of 56 or lower). The goal is attainable, but only with the implementation of lake and watershed management practices as described in this UAA. 2. The Water Quality Goal is a trophic state index score that meets or exceeds the necessary level to attain and maintain full support of swimming and fishing: A Trophic State Index (TSISD) of 53 or lower to fully support swimming and a Trophic State Index (TSISD) of 56 or lower to fully support the lake's fishery. This goal is also attainable, but only with the implementation of lake and watershed management practices discussed in this UAA. 3. The Aquatic Communities Goal is a water quality that fully supports fishing, according to the Minnesota Department of Natural Resources (MDNR) "Ecological Use Classification." This goal is attainable, but only with the implementation of lake and watershed management practices listed herein. 4. The Water Quantity Goal for Lake Riley is to manage surface water runoff from a regional flood, the critical 100-year frequency storm event. This goal has been achieved. 5. The Wildlife Goal for Lake Riley is to protect existing, beneficial wildlife uses. The wildlife goal has been achieved. ::ODMA\11CDOCS9)OCS\229377\1 ii Water Quality Problem Assessment An evaluation of 1971 through 1998 Lake Riley water quality data was completed to determine the lake's current water quality. Results of this evaluation indicate the lake's water quality has remained relatively stable over time. The lake's poor water quality is related to excessive inputs of phosphorus. Sources of phosphorus include: (1) runoff -borne phosphorus from its urbanized watershed; (2) Rice Marsh Lake internal loading (i.e., sediment phosphorus release and vegetation decay) conveyed to Lake Riley via Riley Creek; (3) Lake Riley internal loading (i.e., sediment phosphorus release); and (4) atmospheric deposition. Historical Water Quality Trends Trend analyses of 1974 through 1998 data indicate no significant change in the lake's water quality. The results of the regression analyses indicate that Secchi disc transparency has been declining at an average rate of 0.02 meters per year (less than 1 inch); chlorophyll a concentration in the epilimnion (upper 6 feet) has increased at the rate of 0.07 µg/L per year; total phosphorus concentration in the epilimnion has been decreasing at a rate of 1.2 µg/L per year. The changes in Secchi disc and total phosphorus are significantly different from zero, statistically, but the chlorophyll changes are not significant. Hence, the data indicate the lake's current water quality problems are unlikely to change unless management practices are implemented to improve the lake's water quality. A comparison of baseline (i.e., 1971 to 1987) and current (1988 to 1998) trophic state index (TSI) values indicates that Lake Riley has been unable to fully support swimmable use during the baseline and current periods. All but two summer averages exceeded MPCA-criteria (i.e., TSI <53) for full support swimmable use. Lake Riley's water quality has failed to meet MDNR-criteria during 36 percent of the baseline period and during 80 percent of the current period. Current Water Quality The current water quality of Lake Riley is poor, and recreational activities are impaired by summer algal blooms. The 1997 through 1998 total phosphorus concentration data indicate the lake was hypereutrophic (very poor water quality) during the spring and fall periods and eutrophic (poor water quality) during the summer period. Chlorophyll measurements during 1997 through 1998 indicate the lake was hypereutrophic (very poor water quality) during the fall of 1997 and during most of the 1998 summer period. Chlorophyll values during the fall of 1997, May of 1998, and late -June through August of 1998 exceeded nuisance levels (>20 µg/L). Secchi disc measurements during 1997 through 1998 ranged from oligotrophic (excellent) to hypereutrophic (very poor). Excellent transparency was noted during the winter, good transparency was noted during early -May, very poor ::ODMA\PCDOCS\DOCS\229377\1 iii I 1 1 1 transparencies were noted during the late -summer period, and poor transparencies were noted at other times during the monitoring period. Hence, moderate to severe recreational -use impairment occurred during the summer (Osgood, 1989). The lake's recreational -use impairment appear to be largely determined by algal abundance. Phosphorus Budget Lake Riley's 5,213-acre watershed is comprised of a 178-acre isolated watershed, a 1,585-acre direct watershed, and a 3,450-acre indirect watershed. Computer simulations of runoff water quality indicate that the annual total phosphorus load to Lake Riley under existing land use conditions varies from 670 pounds under dry climatic conditions (i.e., 19 inches annual precipitation) to 1,655 pounds under wet climatic conditions (i.e., 41 inches annual precipitation; See Figure EX-1). The average rate of phosphorus loading to the 286-acre lake is 3 pounds of phosphorus per acre of lake per year, which is excessive and causes water quality problems (L = 0.375 g/m2/yr). tComputer simulations of runoff water quality indicate that an increased total phosphorus load will occur under proposed future land use conditions. Total phosphorus loads are estimated to vary from ' 785 pounds under dry climatic conditions (i.e., 19 inches of annual precipitation) to 1,849 pounds under wet climatic conditions (i.e., 41 inches annual precipitation; See Figure EX-2). The average ' rate of phosphorus loading to the 286-acre lake is estimated to be 4 pounds of phosphorus per acre of lake per year under proposed future land use conditions (L = 0.438 g/m2/yr). ' Increased phosphorus loading under proposed future land use conditions includes phosphorus loading from the proposed Highway 312 project. Assuming no new ponds are constructed to treat highway runoff waters, Lake Riley total phosphorus loading increases are expected to range from 34 pounds ' under dry climatic conditions (i.e., 19 inches of annual precipitation) to 74 pounds under wet climatic conditions (i.e., 41 inches annual precipitation). The Highway 312 total phosphorus load represents ' S percent of the total future phosphorus load to Lake Riley under dry climatic conditions (i.e., 19 inches of annual precipitation) and 4 percent under wet climatic conditions (i.e., 41 inches annual precipitation). Assuming all highway runoff waters are treated by ponds meeting MPCA- and ' NURP-criteria, total phosphorus loading increases are expected to range from 16 pounds under average climatic conditions (i.e., 27 inches of annual precipitation) to 25 pounds under wet climatic 1 1 1 11 conditions (i.e., 41 inches annual precipitation). Lake Riley's annual phosphorus budget for an average precipitation year (i.e., 27 inches of precipitation) indicates approximately 58 percent of the lake's annual phosphorus load enters the lake from Riley Creek. Lake Riley's direct watershed contributes approximately 3 percent of the annual load to the creek, and approximately 55 percent of the lake's annual phosphorus load is the outflow from Rice Marsh Lake. Other watershed phosphorus sources each contribute from 0.2 to 10 percent of the lake's annual phosphorus load. Atmospheric deposition and the lake's internal load represent 7 and 8 percent of the annual phosphorus load, respectively (See Figure EX-3). ::ODMA\PCDOCS\DOCS\229377\1 iv 1 Total Phosphorus Loads to Lake Riley Under Varying Climatic Conditions Existing Watershed Land Use 2000 1500 1000 a° 500 0 1 ' P:\23\27\053\rileyuaa\report\tpbudget wb2:Avg. Yr. Dry (19 in.) Figure EX-1 1 t Total Phosphorus Loads to Lake Riley Under Varying Climatic Conditions t Proposed Future Watershed Land Use 2000 ' 1500 1000 a° 500 ' 0 1 1 1 1 1 ' P:\23\27\053\rileyuaa\report\tpbudget.wb2:Avg. Yr. Figure EX-2 Lake Riley Phosphorus Budget: Sources Average Precipitation Year (27 Inches) Existing Watershed Landuse 1 ' Internal Load (8.22%) Atmos. Dep. (6.77%) 1 1 RM Outflow (54.64%) 1 ' P:\23\27\053\rileyuaa\report\tpbudget.wb2:Avg. Yr. Inflow # 2.11 (1.34%) — Inflow # 3.11 (1.23%) Inflow # SP3 (2.31%) Inflow # 4.45 (9.76%) Inflow # 9.11 (1.51%) Dir. Watershed (7.61%) Inflow Station #1 (3.56%' --Inflow # 6.11 (0.22%) Riley Cr. (Dir. Wat.) (2.83°. Note: Lake Riley inflow locations are shown on Figurf A-5 (Appendix A) Figure EX-3 Aquatic Plants Macrophyte (i.e., aquatic plant) surveys performed during 1998 determined that one undesirable non- native macrophyte species was present in Lake Riley. Eurasian watermilfoil typically follows an aggressive growth pattern and eliminates native species from a lake. Eurasian watermilfoil was found throughout Lake Riley. However, because most portions of the lake contain only two plant species, eradication of Eurasian watermilfoil would eliminate needed fisheries habitat. Consequently, preservation of this species is recommended. Recommended Goal Achievement Alternatives Two different lake improvement alternatives will achieve or exceed District goals for Lake Riley. The two alternatives are: • Manage Rice Marsh Lake (treat Rice Marsh Lake with alum and lime slurry) • Manage Rice Marsh Lake (treat Rice Marsh Lake with alum and lime slurry); Manage Lake Riley (treat Lake Riley with alum); and Treat Highway Runoff (treat Highway 312 runoff with four or five ponds meeting MPCA- and NURP-criteria) The two alternatives were evaluated to compare cost and benefit differences (See Table EX-1). Figure EX-4 compares the minimum and maximum costs of the two alternatives. Treatment of Rice Marsh Lake with a mixture of alum and lime slurry is expected to achieve the District's water quality goals for Lake Riley and is recommended. In addition, treatment of Lake Riley with alum is recommended to expedite goal achievement. Displacement of the higher phosphorus waters within Lake Riley with lower phosphorus waters from Rice Marsh Lake following its treatment may take several years. Hence, treatment of Lake Riley with alum is recommended to achieve rapid water quality improvement and rapid goal achievement. An alum treatment of Lake Riley will also remove the lake's internal phosphorus load for approximately 10 years, further improving the lake's water quality. Treatment of runoff waters from proposed Highway 312 by 4 or 5 ponds meeting MPCA- and NURP-criteria will minimize phosphorus loading increases to Lake Riley. Treatment of runoff waters will facilitate goal attainment by the two lake improvement alternatives discussed in the previous paragraph. ' ::ODMA\PCDOCS'\DOCS\229377\1 viii 1 i i i i i i i i i i i i i i i 011111111 i i i $400,000 $350,000 $200,000-- $150,000 $100,000 $50,000 $0 Lake Riley Costs to Meet or Exceed Goals =MInImum low AIW Maximum Cost Water Duality Recreation - --- __ Minimum Cost DOLLARS Aquatic Communities -- GOALS Wildlife Water Quantity "Minimum Cost" is the cost of the option that just meets each of the goals set for Lake Riley under most climatic conditions. "Maximum Cost" is the cost of the most expensive option analyzed in this study that meets or exceeds each of the goals set for Lake Riley under all climatic conditions. Figure EX-4 Table EX-1 Benefits and Costs of Two Goal Achievement Alternatives Trophic State Index (TSIs9) Value Wet year Average Year Dry Year Treatment and (1983) (1995) (1988) Estimated Management Activities District Goal (41 inches of precipitation) (27 inches of precipitation) (19 inches of precipitation) Cost (Dollars) Existing Watershed Land Uses Manage Rice Marsh <53 43 46 45 $200,000 Lake Manage Rice Marsh <53 39 39 38 $400,000 Lake and Lake Riley, Treat Highway Runoff Proposed Future Land Uses Manage Rice Marsh <53 46 48 49 $200,000 Lake Manage Rice Marsh <53 40 39 44 $400,000 Lake and Lake Riley, Treat Highway Runoff Selected Implementation Plan The selected implementation plan is Manage Rice Marsh Lake and Lake Riley, Treat Highway Runoff (treat Rice Marsh Lake with alum and lime slurry; treat Lake Riley with alum; and treat proposed Highway 312 runoff waters with four or five ponds meeting MPCA- and NURP-criteria). The selected plan provides the greatest benefit to Lake Riley and is expected to result in rapid goal achievement. Treatment of Rice Marsh Lake with alum/lime slurry will include: • Collection and analysis of Rice Marsh Lake sediment cores to determine the extractable phosphorus content of the upper 5 centimeters of lake sediment. • Lab experiments to determine the alum and lime slurry dose required to reduce Rice Marsh Lake internal loading to less than 10 percent of current levels. • Treatment of Rice Marsh Lake with selected dose of alum/lime slurry mixture. Lake Riley will be treated with an alum dose that is based upon the extractable phosphorus content of the upper 5 centimeters of lake sediment. A sediment core sample will be collected from the center of Lake Riley. The upper 5 centimeters of the core will be analyzed for extractable phosphorus. Alum dosage will be based upon a ratio of approximately 100 parts aluminum to 1 part extractable phosphorus. The proposed Highway 312 project will include the construction of 4 or 5 ponds meeting MPCA- and NURP-criteria to treat highway runoff waters. ::ODMA\PCDOCS\DOCS\229377\1 Appendix C Report on Paleolimnological Analyses of Rice Marsh Lake Sediments by Dr. Daniel R. Engstrom of the St. Croix Watershed Research Station April 20, 2004 To: Keith Pilgrim, Barr Engineering From: Daniel Engstrom, St. Croix Watershed Research Station Re: Rice Marsh Lake Results: The main points of interpretation for Rice Marsh Lake are as follows (see attached spreadsheet and graphs). 1. The Loss on Ignition profile shows in excess of 70% organic matter in the lower sections of the core with a sharp drop to 50-55% between 60 and 50 cm. The high organic content suggests a shallow macrophyte dominated system, while the up -core decline indicates either increased watershed erosion or a decrease in fringing macrophyte beds which otherwise filtered clastic sediments in watershed runoff. The change is almost certainly related to the onset of European land -use changes in the catchment, and its onset is dated to c. 1860 by 210Pb results (below). 2. Total Z10Pb activity declines from surface values around 8 pCUg to a relatively constant background (supported 210Pb) of 0.3 pCi/g below 60 cm. The down -core decrease is generally monotonic, though there are obvious changes in slope (e.g. 10 cm, 26 cm) and small reversals (30 cm) which represent changes in sediment flux (see below). 3. Dates calculated according to the constant rate of supply (c.r.s.) model have an uncertainty (based on counting precision — a minimum error) of less than t 6 years for the last century; these errors rise substantially for the oldest three dated intervals in the core, approaching 27 years at the bottom (1853). The large uncertainty of the older dates is typical for 210Pb, which is generally reliable only for the last 120-150 years. 4. Sediment accumulation rates are low throughout the core and vary between 0.013 and .030 g cm 2 yf 1 over the period of record Although the uncertainty associated with 19te century rates is relatively large, there does appear to be an upward trend in sediment flux between about 1890 and 1910; rates fluctuate thereafter until about 1940 and then begin a notable decline into the 1970s. Present day sedimentation rates are similar to those in the earliest part of the record Compared to most other lakes in the Twin Cities metro region (in excess of 40 with 210Pb dated cores), the changes in sediment flux in the Rice Marsh core are relatively modest and do not show the large increases typically associated with post -European land -use changes (agricultural and urban development). The notable decline in organic content (50-60 cm) is not accompanied by a large increase in sediment flux, which would otherwise be expected if the change actually represented a major increase in watershed erosion. Such results support the alternative explanation — that the decline in organic content was caused by a reduction in macrophyte abundance which reduced the flux of organic detritus to the core site. 5. The inventory of unsupported 210Pb in the core (5.9 pCi cm 2) is equivalent to a 21opb flux of 0.19 pCi cm yr 1. This value is less than half of the mean atmospheric flux of 210Pb for the region (ca. 0.5 pCi cm2 yr 1), indicating that sediments have been preferentially deposited elsewhere in the basin. Assuming that the core was taken from the deepest part of the lake, this finding is perplexing, as deep -water sites tend to over -collect fine grained sediments because of focusing. The core shows no evidence for a hiatus in deposition or removal of sediment (e.g. dredging), though such events cannot be totally ruled out based on these data alone. Methods: Dry Density/Loss-on-Ignition: All sediment core intervals were measured for water content and t the percentages of organic matter, carbonate, and non -carbonate inorganic matter by loss -on - ignition methods (Heiri et al., 2001). Each sample was homogenized with a stainless steel spatula in its original container, and 1-2 g of wet sediment was transferred to a pre -weighed 5-ml ceramic crucible. The crucible was immediately re -weighed on a electronic analytical balance and the weights automatically logged through serial interface to a laptop computer. Samples were dried (in batch) in a convection drying oven for 24 hours, and then ignited in a muffle furnace at 550° ' C for one hour. The samples were re -weighed and fired a second time at 1000° for one hour. Dry density was calculated from water content and fixed densities for organic and inorganic fractions. ' Lead-210 Dating: The sediments from Rice Marsh lake were analyzed for 210Pb activity to determine age and sediment accumulation rates for the past 150 years. Lead-210 was measured at ' 20 depth intervals through its grand -daughter product 2 past with 209Po added as an internal yield tracer. The polonium isotopes were distilled from 0.2-1.0 g dry sediment at 550° C following pretreatment with concentrated HCl and plated directly onto silver planchets from a 0.5 N HCl solution (modified from Eakins and Morrison 1976). Activity was measured for 1-12 days with ' ion -implanted detectors and an EG&G Nuclear alpha spectroscopy system. Unsupported 210Pb was calculated by subtracting supported activity from the total activity measured at each level, with supported 210Pb estimated from the asymptotic activity at depth (the mean of the lowermost ' three samples in the core). Dates and sedimentation rates were determined according to the c.r.s. (constant rate of supply) model with confidence intervals calculated by first -order error analysis of counting uncertainty (Appleby, 2001). ' Appleby, P. G. 2001. Chronostratigraphic techniques in recent sediments. Pages 171-203 in W. M. Last and J. P. Smol, editors. Tracking Environmental Change Using Lake Sediments. ' Volume 1: Basin Analysis, Coring, and Chronological Techniques. Kluwer Academic Publishers, Dordrecht. ' Eakins, J. D., and & T. Morrison. 1978. A new procedure for the determination of lead-210 in lake and marine sediments. International Journal of Applied Radiation and Isotopes 29:531- 536. ' Heiri, O., A. F. Lotter, and G. Lemcke. 2001. Loss on ignition as a method for estimating organic and carbonate content in sediments: reproducibility and comparability of results. Journal of Paleolimnology 25:101-110. 1 1 1 7 T L a m m O U F_ Rice Marsh Lake Minnesota 0 20 40 60 80 100 % Organic Matter 21opb Age (yr) 0 20 .01 0 ' N � � 1 m V 40 �pI O� L C, O. 60 CO i 0 m � O U 80 , 100 120 0.1 1 Total 21°Pb Activity (pCi g-1) 201 199 197 m 19E m a m a 0 N 19, 18i 18' to! 10 0 0.01 0.02 0.03 0.04 Sediment Accumulation (g cm2yr 1) ' Loss -On -Ignition Rice Marsh Lake, MN / 1 1 l 1 1 Top Base Wet (g/cc) Dry (g/cc) Dry/Wet Org/Wet % Organic % CaCO3 % Inorg. 0 2 1.0097 0.0218 0.0216 0.0105 48.62 9.04 42.34 2 4 1.0140 0.0302 0.0298 0.0144 48.33 8.34 43.33 4 6 1.0185 0.0403 0.0396 0.0192 48.60 7.34 44.06 6 8 1.0187 0.0408 0.0401 0.0196 48.95 6.89 44.16 8 10 1.0212 0.0466 0.0456 0.0222 48.71 7.32 43.97 10 12 1.0218 0.0479 0.0469 0.0224 47.79 7.73 44.47 12 14 1.0243 0.0527 0.0515 0.0248 48.22 7.28 44.50 14 16 1.0225 0.0498 0.0487 0.0243 49.95 6.38 43.66 16 18 1.0205 0.0458 0.0449 0.0232 51.64 5.82 42.54 18 20 1.0205 0.0459 0.0450 0.0232 51.58 5.40 43.02 20 22 1.0196 0.0441 0.0432 0.0226 52.28 4.66 43.05 22 24 1.0198 0.0448 0.0439 0.0232 52.90 4.60 42.50 24 26 1.0196 0.0447 0.0438 0.0235 53.75 3.97 42.28 26 28 1.0210 0.0478 0.0468 0.0250 53.36 4.42 42.22 28 30 1.0220 0.0499 0.0488 0.0259 52.99 3.84 43.18 30 32 1.0219 0.0504 0.0493 0.0272 55.11 3.58 41.31 32 34 1.0217 0.0513 0.0502 0.0290 57.70 3.71 38.59 34 36 1.0214 0.0498 0.0488 0.0280 57.441 3.50 39.06 36 38 1.0213 0.0494 0.0483 0.0271 56.041 3.14 40.82 38 40 1.0221 0.0501 0.0490 0.0265 54.16 3.20 42.63 40 44 1.0231 0.0529 0.0517 0.0276 53.30 2.84 43.86 44 48 1.0259 0.0585 0.0571 0.0302 52.99 3.33 43.68 48 52 1.0253 0.0579 0.0565 0.0306 54.23 3.23 42.54 52 56 1.0194 0.0477 0.0468 0.0295 62.93 3.02 34.05 56 60 1.0152 0.0392 0.0386 0.0272 70.37 2.71 26.92 60 64 1.0123 0.0330 0.0326 0.0241 73.86 2.49 23.65 64 68 1.0129 0.0352 0.0347 0.0258 74.37 2.45 23.18 68 72 1.0135 0.0363 0.0358 0.0266 74.44 2.34 23.22 72 76 1.0136 0.0364 0.0359 0.0268 74.69 2.38 22.92 76 80 1.0119 0.0332 0.0328 0.0255 77.65 2.39 19.96 80 84 1.0101 0.0283 0.0280 0.0217 77.39 2.33 20.29 84 88 1.0097 0.0266 0.0263 0.0202 76.63 2.60 20.76 88 92 1.0111 0.0304 0.0301 0.0230 76.63 2.48 20.89 92 96 1.0102 0.0285 0.0282 0.0219 77.56 2.40 20.04 96 100 1.0128 0.0349 0.0344 0.0262 76.11 2.26 21.63 100 104 1.0159 0.0419 0.0413 0.0300 72.70 2.53 24.77 104 108 1.0166 0.0447 0.0440 0.0323 73.47 2.55 23.97 108 112 1.0180 0.0474 0.0465 0.0328 70.58 2.46 26.96 112 116 1.0184 0.0483 0.0474 0.0339 71.59 2.84 25.58 116 120 1.0184 0.0495 0.0486 0.0357 73.39 2.74 23.87 120 124 1.0191 0.0509 0.05001 0.0362 72.34 2.61 25.05 1241 1281 1.0208 0.0542 0.05311 0.0373 70.28 2.71 27.01 5/5/2004 Page 1 ' Loss -On -Ignition Rice Marsh Lake, MN 1 1 1 L 1 Top Base lWet (g/cc Dry (g/cc)TO. t Org/Wet % Organic % CaCO3 % Inorg. 128 132 1.0216 0.056452 0.0386 69.88 2.65 27.47 132136 1.0226 0.058370 0.0398 69.75 2.86 27.39 136 140 1.0235 0.060390 0.0408 69.17 2.86 27.97 140 144 1.0246 0.0632 0.0617 0.0429 69.48 2.83 27.69 144 148 1.0249 6.0642 0.0626 0.0430 68.61 2.98 28.41 148 152 1.0266 6.0678 0.0661 0.0445 67.33 3.12 29.55 0_ a� 0 0 v 0 20 40 60 80 100 120 140 160 Rice Marsh Lake: L01 - - ------ -- ----- Settlement Horizon ---------------------------------- -- -- - - _ 20 40 60 80 100 5/5/2004 Page 2 ' Loss -On -Ignition Rice Marsh Lake, MN / Top Base lWet (g/cc) Dry (g/cc) Dry/Wet Org/Wet I % Organic % CaCO3 % Inorg. % Organic Matter 5/5/2004 Page 3 Rice Marsh Lake, Minnesota: Coring Date: 1/15/2004 Code # Int. Top Int. Base Sed. Wt. Spike Wt. Extr. Date Rho Seg.No. Count Time Start Count End Count (cm) (cm) (g dry) (g) (m/d/y) (g/cm3) (s) (m/d/y) (m/d/y) RM-2 0 2 0.1596 1.0052 ######## 0.0218 5 235040 ######## ######## RM-6 4 6 0.4236 1.0022 3/2/2004 0.0403 6 83040 3/2/2004 3/3/2004 RM-10 8 10 0.4467 1.0049 ### 0.0466 2 79610 ######## ######## RM-14 12 14 0.5135 1.0026 3/2/2004 0.0527 7 83150 3/2/2004 3/3/2004 RM-16 14 16 0.5378 1.0152 ### ####1 0.0498 8 321395 ######## ######## RM-18 16 18 0.5117 1.0027 ######## 0.0458 1 234600 ######## ######## RM-20 18 20 0.6079 1.0062 ######## 0.0459 5 321291 ######## ######## RM-22 20 22 0.5324 1.0007 3/2/2004 0.0441 10 498800 3/2/2004 3/8/2004 RM-26 24 26 0.4124 1.0017 ######## 0.0447 8 574750 ######## ######## RM-30 28 30 0.689 1.004 ######## 0.0499 11 242970 ######## ######## RM-34 32 34 0.3949 1.0052 ######## 0.0513 15 579190 ######## ######## RM-38 36 38 0.6378 1.0024 ######## 0.0494 7 662660 ######## ######## RM-44 40 44 0.6608 1.0028 ######## 0.0529 14 582450 ######## ######## RM-48 44 48 0.8624 1.0036 ######## 0.0585 6 5731411######## ######## RM-52 48 52 1.0107 1.0012 ######## 0.0579 4 488520 ######## ######## RM-56 52 56 0.8691 0.9983 ######## 0.0477 10 602680 ######## ######## RM-60 56 60 0.5126 1.0021 ######## 0.0392 12 1009680 ######## 3/3/2004 RM-72 68 72 0.5281 1.0012 ######## 0.0363 11 1009329 ######## 3/3/2004 RM-88 84 88 0.5035 1.0115 ######## 0.0266 2 1005040 ######## ######## RM-104 100 104 0.5906 1.0136 ########1 0.0419 1 1004920 ######## ######## 5/5/2004 Lead-210: Raw Data Page 1 Rice Marsh Lake, Minnesota: Coring Date: 1 /15/2004 5/5/2004 Lead-210:Raw Data Page 2 Rice Marsh Lake, Minnesota: Coring Date: 1 /15/2004 Code # 1 st 209 Ch Nth 209 Ch 1 st 210 Ch Nth 210 Ch 209 Counts 210 Counts 210 Act. A210 Act. Plat. Effic. Series # (PCi/g) (ts.d.) (%) RM-2 152 165 238 251 4916 1233 7.0114 0.2234 68 1 RM-6 156 166 241 251 1563 1067 7.1325 0.2834 63 2 RM-10 156 169 242 255 1723 1139 6.5637 0.2508 72 3 RM-14 152 164 237 249 1391 1011 6.2562 0.2586 57 4 RM-16 157 167 242 252 46761 2778 4.9837 0.11951 47 5 RM-18 144 157 229 242 4738 1929 3.5392 0.0956 67 6 RM-20 152 165 237 250 5171 1931 2.7516 0.0734 52 7 RM-22 149 161 234 246 8942 2076 1.9436 0.0474 61 8 RM-26 156 167 242 253 9685 1063 1.1879 0.0385 55 9 RM-30 138 150 223 235 4959 1008 1.3102 0.0453 67 10 RM-34 152 163 238 249 10894 1077 1.1226 0.0359 63 11 RM-38 151 163 237 249 10267 1044 0.7153 0.0233 53 12 RM-44 145 157 230 242 9860 1006 0.6912 0.0229 56 13 RM-48 155 165 242 252 9048 1080 0.6223 0.02 52 14 RM-52 158 170 244 256 8184 1053 0.5691 0.0186 55 15 RM-56 145 160 231 246 10772 1037 0.4948 0.0161 61 16 RM-60 146 160 231 245 20218 968 0.4218 0.0139 64 17 RM-72 139 151 224 236 20148 698 0.2959 0.0114 66 18 RM-88 154 169 240 255 19918 645 0.2934 0.0118 65 19 RM-104 143 157 229 243 19782 923 0.3632 0.0122 65 20 5/5/2004 Lead-210: Raw Data Page 3 Rice Marsh Lake, Minnesota: Coring Date: 1/15/2004 Top of Base of Cum. Unsup. Error of Cum. Act. Age: Base Error of Date Sediment Error of Interval Interval Dry Mass Activity Unsup. Act. below Int. of Int. Age A.D. Accum. Sed. Accum (cm) (cm) (g/cm2) (pCi/g) (ts.d.) (pCi/cm2) (yr) (ts.d.) (g/cm2 yr) (ts.d.) 0 2 0.0435 7.8314 0.2648 5.5067 1.93 0.74 2002.1 0.0225 0.00082 4 6 0.1862 6.8166 0.2863 4.5039 8.38 0.78 1995.7 0.0218 0.00094 8 10 0.36631 6.2477 0.2519 3.3550 17.84 0.87 1986.2 0.0181 0.00077 12 14 0.5711 5.9402 0.2597 2.1236 32.53 1.10 1971.5 0.0127 0.00060 14 16 0.6707 4.6677 0.1218 1.6586 40.46 1.33 1963.6 0.0125 0.00051 16 18 0.7623 3.2232 0.0984 1.3632 46.76 1.56 1957.3 0.0145 0.00073 18 20 0.8542 2.4356 0.0770 1.1394 52.52 1.83 1951.5 0.0160 0.00092 20 22 0.9423 1.6276 0.0529 0.9960 56.84 2.06 1947.2 0.0204 0.00134 24 26 1.1203 0.8719 0.0451 0.81131 63.43 2.13 1940.61 0.0303 0.00239 28 30 1.31471 0.9942 0.0510 0.6240 71.86 2.70 1932.21 0.0211 0.00191 32 34 1.51851 0.8066 0.0429 0.4505 82.32 3.63 1921.71 0.0189 0.00215 36 38 1.71781 0.3993 0.0330 0.3527 90.18 4.24 1913.91 0.0290 0.00426 40 44 2.03151 0.3752 0.0327 0.2335 103.42 6.2811900.61 0.0225 0.00417 44 48 2.2657 0.3063 0.0308 0.1618 115.20 8.94 1888.81 0.0199 0.00493 48 52 2.4973 0.2531 0.0299 0.1032 129.64 13.84 1874.41 0.0160 0.00575 52 56 2.6881 0.1788 0.0284 0.06911 142.53 20.50 1861.51 0.0148 0.00802 56 60 2.8450 0.1058 0.0272 0.0525 151.35 26.85 1852.71 0.0178 0.01362 Supported Pb-210: 0.316 t 0.0234 pCi/g Cum. Unsup. Pb-210: 5.8477 pCi/cm2 Number of Supported Samples: 3 1 Unsup. Pb-210 Flux: 0.1858 pCi/cm2 yr 5/5/2004 Lead-210 Dating D.R. Engstrom Lill —A FILD 1811622320001 Rice Marsh Lake --- 40110 1811622330001 i c O O OO U Zak _ 240200 . z505oz4o390 g g ^' g Rq \ 250240 M ry - 1I118271400/4 -. 257950020 �' 257950p0 95004 gg gggg R8�888 J�25•7i NNIVNNl`INN �_- 9510 70 J1' -"W, 100 O10 W W W W W O� "�s9„ro Lake Riley I; 259900990 \ - >� pn iSOZS,4OO\ N N �Y �Y h �J ag tWnn LDo s o o Q Proposed Improvement Site 600 0 600 1200 1800 2400 Feet 200 0 200 400 600 800 Meters AFFECTED PARCELS Riley Purgatory Bluff Creek Watershed District Chanhassen/Minnetonka, MN Affected Parcels --Carver County PID SNAME SITEADD NAME CITY STATE ZIP ZIP4 255620030 STATE OF MINNES 0 STATE OF MINNESOTA-DOT ST PAUL MN 55155 1899 256860010 WHITEHILL,CLIFF 0 CLIFFORD L WHITEHILL VERO BEACH FL 32967 7416 256860020 WHITEHILL,CLIFF 80 78TH ST W CLIFFORD L WHITEHILL VERO BEACH FL 1 32967 17416 251780030 DYS PROPERTIES 30 LAKE DR E DYS PROPERTIES HOPKINS MN 55343 8840 252530030 CHANHASSEN,CITY 0 CITY OF CHANHASSEN CHANHASSEN MN 55317 0147 251820750 CHANHASSEN,CITY 0 CITY OF CHANHASSEN CHANHASSEN MN 55317 0147 258680020 CHURCH OF ST HU 8201 MAIN ST CHURCH OF ST HUBERT CHANHASSEN MN 55317 9647 253451130 CHANHASSEN,CITY 0 CITY OF CHANHASSEN CHANHASSEN MN 55317 0147 258680100 AUSMAR DEVELOPM 0 AUSMAR DEVELOPMENT CO LLC CHANHASSEN MN 55317 0235 258680110 AUSMAR DEVELOPM 0 AUSMAR DEVELOPMENT CO LLC CHANHASSEN MN 55317 0235 257400040 FIEDLER,BEVERLY 8521 TIGUA LN BEVERLY A FIEDLER CHANHASSEN MN 55317 9615 257400030 HAUTMAN,JOSEPH 8551 TIGUA LN JOSEPH & GAYLE HAUTMAN CHANHASSEN MN 55317 9615 255530010 CHANHASSEN,CITY 0 CITY OF CHANHASSEN CHANHASSEN MN 55317 0147 250240110 CHANHASSEN,CITY 0 CITY OF CHANHASSEN CHANHASSEN MN 55317 0147 257400021 PETERSON,ERIC L 8561 TIGUA LN ERIC L PETERSON CHANHASSEN MN 55317 9615 257400020 LYONS,PAUL C 8571 TIGUA LN PAUL C LYONS CHANHASSEN MN 55317 9615 250242600 KLINGELHUTZ DEV 8910 LAKE RILEY BLVD KLINGELHUTZ DEVELOPMENT CO CHASKA MN 55318 0089 250240100 LAKEVIEW HILLS 125 LAKEVIEW RD E LAKEVIEW HILLS LLC MINNETONKA MN 55343 9466 250242412 STATE OF MINNES 0 STATE OF MINNESOTA - DOT ST PAUL MN 55155 1801 250231600 CURRY,JAMES A 0 JAMES A CURRY EDINA MN 55436 1250 255530060 NORTH BAY HOMEO 0 NORTH BAY HOMEOWNERS ASSN INC ROSEVILLE MN 55113 1128 255530030 CHANHASSEN,CITY 0 CITY OF CHANHASSEN CHANHASSEN MN 55317 0147 255530020 LAKEVIEW HILLS 0 LAKEVIEW HILLS LLC MINNETONKA MN 55343 9466 250240100 LAKEVIEW HILLS 125 LAKEVIEW RD E LAKEVIEW HILLS LLC MINNETONKA MN 55343 9466 250242600 KLINGELHUTZ DEV 8910 LAKE RILEY BLVD KLINGELHUTZ DEVELOPMENT CO CHASKA MN 55318 0089 250240200 LUDWIG,JOAN M 9005 LAKE RILEY BLVD JOAN M LUDWIG CHANHASSEN MN 55317 8650 250240300 COOPER,LAURA MA 9015 LAKE RILEY BLVD LAURA MARIE COOPER CHANHASSEN MN 55317 8650 250240500 GRANT,NORMAN C 9021 LAKE RILEY BLVD NORMAN C JR & KIMBERLY GRANT CHANHASSEN MN 55317 8650 257470010 SMITH,DELBERT R 9051 LAKE RILEY BLVD DELBERT R & NANCY R SMITH CHANHASSEN MN 55317 8650 p:\23\27\E61\Ownership Tables.xls Chan -Riparian Parcels Page 1 of 3 Affected Parcels --Carver Count PID SNAME SITEADD NAME CITY STATE ZIP I ZIP4 257470020 LEWIS,RAYMOND M 9071 LAKE RILEY BLVD RAYMOND M & JUDITH N LEWIS CHANHASSEN MN 55317 8650 257950020 BACKER,RONALD S 9101 LAKE RILEY BLVD RONALD S & JEANETTE K BACKER CHANHASSEN MN 55317 8652 257950030 TONJES,JAMES L 9111 LAKE RILEY BLVD JAMES L TONJES MINNEAPOLIS MN 55440 1113 257950040 HUNGELMANN,J P 9117 LAKE RILEY BLVD J P JR & JUDITH M HUNGELMANN CHANHASSEN MN 55317 8652 257950050 GOULETT,JOHN B 9119 LAKE RILEY BLVD JOHN B JR & MARLYN G GOULETT CHANHASSEN MN 55317 8652 257950060 OLIN,RICHARD D 9125 LAKE RILEY BLVD RICHARD D & FRIEDA A OLIN CHANHASSEN MN 55317 8652 257950070 DUHAIME,DAVID A 9131 LAKE RILEY BLVD DAVID A DUHAIME CHANHASSEN MN 55317 8652 257950080 SIMMONS,PATRICK 9203 LAKE RILEY BLVD PATRICK E & ANGELA D SIMMONS CHANHASSEN MN 55317 8654 250240700 SITTER,DONALD W 9249 LAKE RILEY BLVD DONALD W & KATHRYN N SITTER CHANHASSEN MN 55317 8654 250240900 BERSHOW,BARRY A 9271 KIOWA TRL BARRY A & HARRIET F BERSHOW CHANHASSEN MN 55317 8615 250240600 PORTER,TODD W & 9261 KIOWA TRL TODD W & JILL PORTER CHANHASSEN MN 55317 8615 250241000 PEMRICK,PETER J 9251 KIOWA TRL PETER PEMRICK JR & CHANHASSEN MN 55317 8615 257950100 SAPP,LELAND G & 9209 LAKE RILEY BLVD LELAND G SAPP & DIANE K TAYLOR CHANHASSEN MN 55317 8654 257950110 KRIER,CURTIS G 9211 LAKE RILEY BLVD CURTIS G KRIER CHANHASSEN MN 55317 8654 250900020 HALVERSON,CRAIG 9283 KIOWA TRL CRAIG W & KATHRYN HALVERSON CHANHASSEN MN 55317 8615 257950120 HASTINGS,GREGOR 9217 LAKE RILEY BLVD GREGORY L & KELLY R HASTINGS CHANHASSEN MN 55317 8654 257950240 MAJERKO,ALAN R 9247 LAKE RILEY BLVD ALAN R MAJERKO CHANHASSEN MN 55317 8659 257950230 GRANLUND,CRAIG 9245 LAKE RILEY BLVD CRAIG GRANLUND CHANHASSEN MN 55317 8654 257950220 SMITH,JOY A & H 9243 LAKE RILEY BLVD JOY A & HILBERT F SMITH CHANHASSEN MN 55317 8654 257950130 BAKER,DENNIS R 9219 LAKE RILEY BLVD DENNIS R & ANN BAKER CHANHASSEN MN 55317 8654 257950210 SUNNYSLOPE HOME 0 SUNNYSLOPE HOMEOWNERS ASSN CHANHASSEN MN 55317 8604 257950200 OLSON,PAUL KENT 9239 LAKE RILEY BLVD PAUL KENT OLSON CHANHASSEN MN 55317 8654 257950190 JOHNSON,DEAN SC 9235 LAKE RILEY BLVD DEAN SCOTT JOHNSON ST PAUL MN 55124 5013 257950140 SUTER,THOMAS J 9221 LAKE RILEY BLVD THOMAS J & SUE A SUTER EDEN PRAIRIE MN 55347 2851 257950160 HAMILTON,JAMES 9225 LAKE RILEY BLVD JAMES G & LAURA B HAMILTON CHANHASSEN MN 55317 8654 257950180 POTTHOFF,FREDER 9231 LAKE RILEY BLVD FREDERICK POTTHOFF III & CHANHASSEN MN 55317 8654 257950170 YTZEN,RONALD W 19227 LAKE RILEY BLVD RONALD W & ELIZABETH C YTZEN CHANHASSEN 55317 8654 250900030 HALVERSON,CRAIG 9285 KIOWA TRL CRAIG W & KATHRYN HALVERSON CHANHASSEN55317 MMN 8615 250900040 WILLIAMS,STEVEN 9291 KIOWA TRL STEVEN A & RENEE A WILLIAMS CHANHASSEN553171 8615 p:\23\27\E61\Ownership Tables.xls Chan -Riparian Parcels Page 2 of 3 I 1 I 1 I 1 1 1 1 1 1 1 1 1=1 s � M 1=1 IMI � 1=1 m m m m m m m m i a m Affected Parcels --Carver County PID SNAME SITEADD NAME CITY STATE ZIPFZIP4 250900050 BABCOCK,SUSAN M 9351 KIOWA TRL SUSAN MARIE BABCOCK CHANHASSEN MN 55317 250900060 LILLIE,PETER C 9355 KIOWA TRL PETER C & GEORGE-ANN LILLIE CHANHASSEN MN 55317 8617 250900070 DOMKE,EDWIN MIC 9361 KIOWA TRL EDWIN MICHAEL DOMKE CHANHASSEN MN 55317 8617 250900080 BELL,JOHN W & B 9371 KIOWA TRL JOHN W & BEVERLY J BELL CHANHASSEN MN 55317 8617 250900090 MOKSNES,MARK A 9381 KIOWA TRL MARK A & PAMELA K MOKSNES CHANHASSEN MN 55317 8617 250900100 KING,JOYCE E 9391 KIOWA TRL JOYCE E KING CHANHASSEN MN 55317 8617 250251400 NELSON,PRINCE R 9401 KIOWA TRL PRINCE R NELSON CHANHASSEN MN 55317 8201 250250100 O'NEILL,PAMELA 9431 HWY 101 PAMELA A O'NEILL CHANHASSEN MN 55317 8681 254080140 CHADWICK,RICHAR 9530 FOXFORD RD RICHARD J CHADWICK CHANHASSEN MN 55317 8681 254080130 MILLS,DENNIS M 9510 FOXFORD RD DENNIS M & NANCY M MILLS CHANHASSEN MN 55317 8681 254080360 LAKE RILEY WOOD 0 LAKE RILEY WOODS HOMEOWNERS CHANHASSEN MN 55317 8688 254080120 PETER,PETE P & 9490 FOXFORD RD PETE P & JOYCE L PETER CHANHASSEN MN 55317 8686 254080110 JBELLOWS,BRIAN E 9470 FOXFORD RD BRIAN E & TRACY S BELLOWS CHANHASSEN MN 55317 8686 254080100 HENAK,WILLIAM S 280 EASTWOOD CT WILLIAM S HENAK & CHANHASSEN MN 55317 8683 254080090 HENAK,WILLIAM S 0 WILLIAM S HENAK & CHANHASSEN MN 55317 8683 254080080 LENZ,GARY A & N 240 EASTWOOD CT GARY A & NANCY S LENZ CHANHASSEN MN 55317 8683 257420050 BURKE,STEVEN F 9591 MEADOWLARK LN STEVEN F & KATHLEEN M BURKE CHANHASSEN MN 55317 8693 254090010 KENNEDY,DONALD 108 PIONEER TRL DONALD H III & DIANE M KENNEDY CHANHASSEN MN 55317 8659 257420090 REILLY,MICHAEL 9701 MEADOWLARK LN MICHAEL J REILLY & CHANHASSEN MN 55317 8626 254090030 BERKLAND,WENDY 10 PIONEER TRL ELDON L BERKLAND & CHANHASSEN MN 55317 8627 254090020 GRAY,WILLIAM T 50 PIONEER TRL WILLIAM T & CAROL ANN GRAY CHANHASSEN MN 55317 8627 257420080 MONK,MICHAEL T 9671 MEADOWLARK LN MICHAEL T & TERESA A MONK CHANHASSEN MN 55317 8695 257420060 ERHART,TIMOTHY 9611 MEADOWLARK LN TIMOTHY A & DAWNE M ERHART CHANHASSEN MN 55317 8695 257420070 VOGEL,GAYLE M & 19641 MEADOWLARK LN IGAYLE M & RICHARD P VOGEL ICHANHASSEN MN 1 55317 8660 p:\23\27\E61\Ownership Tables.xls Chan -Riparian Parcels Page 3 of 3 Affected Parcels --He nne in Count PIN HOUSENUM STREETNM MUNINAME ZIPCODE OWNERNAME 1811622230003 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 ICITY OF EDEN PRAIRIE 1811622320001 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 ISTATE OF MINNESOTA 1811622330001 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 STATE OF MINNESOTA 1811622340002 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 STATE OF MN 1911622210038 18640 ST MELLION PL EDEN PRAIRIE 55347 T A COLLETT & J J COLLETT 1911622220003 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 BEARPATH GOLF/CNTRY CLUB L P 1911622240043 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 BEARPATH GOLF/CNTRY CLUB L P 1911622240044 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 BEARPATH GOLF/CNTRY CLUB L P 1911622240045 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 113EARPATH GOLF/COUNTRY CLB LP 1911622310002 9018 RILEY LAKE RD EDEN PRAIRIE 55347 JELAINE M JACQUES 1911622310004 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 ELAINE M JACQUES 1911622310005 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 CITY OF EDEN PRAIRIE 1911622310006 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 CITY OF EDEN PRAIRIE 1911622320001 9014 RILEY LAKE RD EDEN PRAIRIE 55347 W S & S L ANDERSON 1911622320004 9008 RILEY LAKE RD EDEN PRAIRIE 55347 J M & B A KIRTLAND TRUSTEES 1911622320006 9000 RILEY LAKE RD EDEN PRAIRIE 55347 J BUSHEY & M CORYA 1911622320007 9002 RILEY LAKE RD EDEN PRAIRIE 55347 R E LUND & V A LUND 1911622320008 9004 RILEY LAKE RD EDEN PRAIRIE 55347 PAUL J TAUNTON 1911622320009 9012 RILEY LAKE RD EDEN PRAIRIE 55347 DEAN M SCHULKE 1911622320010 9010 RILEY LAKE RD EDEN PRAIRIE 55347 J M & B A KIRTLAND TRUSTEES 1911622340002 9300 RILEY LAKE RD EDEN PRAIRIE 55347 CITY OF EDEN PRAIRIE 1911622340003 9301 RILEY LAKE RD EDEN PRAIRIE 55347 CITY OF EDEN PRAIRIE 1911622340004 9281 RILEY LAKE RD EDEN PRAIRIE 55347 ERNIE SHULDHIESS 1911622340005 9291 RILEY LAKE RD EDEN PRAIRIE 55347 K L SHULDHIESS ETAL 1911622340007 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 CITY OF EDEN PRAIRIE 1911622420008 9100 RILEY LAKE RD EDEN PRAIRIE 55347 CITY OF EDEN PRAIRIE 3011622210004 9450 LAKELAND TER 1 EDEN PRAIRIE 55347 L G SCHOENECKER ET AL TRSTES pA23\27\E61\Ownership Tables.xls Henn -Riparian Parcels Page 1 of 2 m m m m m m m iiiiiii■ m m m m m m m m m m m Affected Parcels --Hennepin Count PIN HOUSENUM STREETNM MUNINAME ZIPCODE OWNERNAME 3011622220002 9536 LAKELAND TER EDEN PRAIRIE 55347 G D HALVORSON/B A HALVORSON 3011622220003 9480 LAKELAND TER EDEN PRAIRIE 55347 DONALD C SARLES ETAL 3011622220004 9470 LAKELAND TER EDEN PRAIRIE 55347 D J & A L FLORENZANO 3011622220005 9510 LAKELAND CIR EDEN PRAIRIE 55347 GEORGE R ADZICK 3011622220006 9520 LAKELAND CIR EDEN PRAIRIE 55347 T P MANNING & S A MANNING 3011622220008 9509 HIGHVIEW DR EDEN PRAIRIE 55347 P & J BRIDGES 3011622220009 9505 HIGHVIEW DR EDEN PRAIRIE 1 55347 IJOHN P FORSTER ETAL 3011622220010 9503 HIGHVIEW DR EDEN PRAIRIE 1 55347 1 R A & M J ADOMAITIS 3011622220011 9501 HIGHVIEW DR EDEN PRAIRIE 1 55347 IJ M WALSTAD & S M WALSTAD p:\23\27\E61\Ownership Tables.xls Henn -Riparian Parcels Page 2 of 2 Lake Riley Rice Marsh Lake Water Quality Improvement Project Comments Issues RM -1.1 Todd- Trail preservation very important. Address any neighborhood concerns associated with proposed ponding. May be a good place for ponding considering current use is the neighborhood dumping grounds. Paul- No Issues RM - 2.1 Justin- No Issues Kate- No Issues Paul- No Issues RM- 2.2 Justin- No Issues Paul- Railroad Property?? No issues RM- 2.4 Todd- No Issues Paul- No Issues RM- 2.5 Todd- No Issues Paul - No Issues RM- 2.6 Todd- Preserve Trail Paul- No Issue RM- 2.8 Todd- No Issue Justin- Treatment Plant Location. Closer the pond can be to 101 and 5 the better. Kate- Need to maximize economic value of the business building pad site. Still some unknowns regarding the development plan. -ponding must be secondary to the development of this site. Paul- Ponding will happen with development of this site. Location of ponding still unknown at this point. - Funding - Timing (after plant, possibly during development of business pad) - Aesthetics - Development???? - Maintenance - Keep ponding tight to roads RM- 4.11a Justin- Southwest Metro Transit Park and Ride Property. - 212 routing Paul- No Issues RM- 4.13 Justin- No Issues Kate- Placement of Pond, Proposing a noise berm with the construction of 212. Depending on where this is constructed may shift area for pond construction. Paul- "No way this will work" in 212 ROW. Proposed where sound wall is going to be constructed. RM-5.22 Todd- No Issue Paul- No Issue RM- 6.5 Justin- No Issue Paul- No Issue RM-6.9 Kate- No Issue except homeowners concerns Paul- No Issue 999.16a Justin- Sans Company plans on developing this property - Office/Retail/ Housing Kate- Sans Development plan ... Lori has a copy Paul- Paul needs slope easement along south and western portion of property. - Northeast part of the property preferred for ponding. 2. 3. 4 5 Riley Purgatory Bluff Creek Watershed District Web Site: http//www.rileypurgatorybluffcreek.org Legal Advisor. Krebsbach & Haik 701 4th Avenue South. Suite 500 Minneapolis. MN 55415 612 333-7400 Fax: 612 333-6959 Engineering Advisor: Barr Engineering 4700 West 77th Street Minneapolis, MN 55435 952 832-2600 Fax: 952 832-2601 NOTICE AND AGENDA SPECIAL MEETING OF THE BOARD OF MANAGERS OF THE RILEY-PURGATORY-BLUFF CREEK WATERSHED DISTRICT Wednesday, November 10, 2004 7:00 p.m. Eden Prairie City Offices 8080 Mitchell Road Eden Prairie, Minnesota Call to Order of Special Meeting. Lake Rilev Basic Water Management Project. a. Receipt of Engineer's Report and Appraiser's Report b. Resolution authorizing transmittal to MDNR and BWSR c. Resolution ordering Final Hearing and Notice of Hearing Unfinished Business. Ne%% Business. kdiournment. Board of Managers Qryszj) fgGV 0 5 2004 CITY OF CHKNHASSEN Howard Peterson Perry Forster Conrad Fiskness Philip Wright Susan Scribner Map Print Output 053 Page 1 of 1 Leemd US Highrays A Higrt ays r CSM �a Reap Lakes Pa¢els lenal PhM 2002 Carver County GIS Mapping Application Map Created on: 10-14-2004 Carver County This map was created using Carver County's Geographic Information Systems (GIS), it is a compilation of information and data from various City, County, State, and Federal offices. This map is not a surveyed or legally recorded map and is intended to be used as a reference. Carver County is not responsible for any inaccuracies contained herein. Jj G bevel o We hM5k9� k as Or wrsd t� �7/ ebs�te/pare Vet_rec�I ap. asp yll�.J ,�,�liS S& p Yni 'APPiw 1 s^is'' Zs.01-SZZ00 Z s;. Z0,3O0 3 0 2 so 1 tZ07050 z5.-Wit3v Z5. 5550010 10/14/2004 Haak, Lori From: Haak, Lori Sent: Monday, July 19, 2004 8:23 AM To: Dave Florenzano Cc: Leslie Stovring; Gerhardt, Todd Subject: DRAFT LRIA Letter to Chanhassen and Eden Prairie Good morning, Dave! Attached please find a DRAFT letter to Chanhassen and Eden Prairie requesting an amendment to the Lake Riley/Rice Marsh Lake petition. It's a brief letter outlining the water quantity issues we discussed at the outlet in June. The intent was that you could send the same thing to both communities. I asked Leslie to review it and she said it looks fine. Feel free to adjust it as you feel necessary. Give me a call if you have questions. Thanks, Dave! Lori Haak Water Resources Coordinator City of Chanhassen 7700 Market Boulevard P.O. Box 147 Chanhassen, MN 55317 Phone: 952.227.1135 Fax: 952.227.1935 Email: Ihaak@ci.chanhassen.mn.us LRIA Petition Amendment Draft.... July 16, 2004 Lori Haak City of Chanhassen 7700 Market Boulevard P.O. Box 147 Chanhassen, MN 55317 Leslie Stovring City of Eden Prairie 8080 Mitchell Road Eden Prairie, MN 55344 Re: Petitions Regarding Lake Riley and Rice Marsh Lake Basic Water Management Projects Dear Lori and Leslie: As you are aware, Lake Riley experienced high levels this spring due, in part, to the blockage of the outlet at Riley Creek. Lakeshore property owners on the lake met with Lori, Bob Obermeyer (RPBCWD), Julie Ekman (DNR) and Al Gray (City of Eden Prairie) on June 8, 2004. At that time, we discussed the level of Lake Riley, the debris that blocks the outlet and the size of the culvert under Lakeland Terrace. Due to the concerns of the lakeshore property owners and the agencies present, it was determined that further investigation of these issues was warranted. To that end, we are requesting that the petition regarding Lake Riley and Rice Marsh Lake Basic Water Management Projects be amended to include an evaluation of water quantity issues on Lake Riley. The project should also recommend ways of addressing the issues that are deemed relevant. The primary concerns that should be addressed include, but should not necessarily be limited to: 1. The elevations of existing structures on the lake; 2. The size of the culvert under Lakeland Terrace; 3. The prevention of culvert blockagetlake outlet maintenance; and 4. Potential impacts to Riley Creek. Please add this petition amendment to the earliest possible City Council meeting so these issues can be addressed by the Riley -Purgatory -Bluff Creek Watershed District in a timely manner. If you have questions or require additional information, feel free to contact me at 952.937.5354. Sincerely, David Florenzano, President Lake Riley Improvement Association Haak, Lori From: Haak, Lori Sent: Wednesday, June 09, 2004 10:42 AM To: 'Dave Florenzano' Subject: Lake Riley/Rice Marsh Lake Use Attainability Analysis Contacts: Dave Florenzano Hi, Dave! I wanted to get this information to you right away so you can take a look at it when things slow down after the graduation parry. Based on what we talked about with Bob yesterday, what you'll need to do is request an amendment to the "Petition of the City of Chanhassen to Riley -Purgatory -Bluff Creek Watershed District for the Lake Riley and Rice Marsh Lake Basic Water Management Projects." The amendment should broaden the scope of the petition to request a study of the outlet of Lake Riley, including discharge volumes and rates (past and present), and recommendations on ways to address flood attenuation issues. (At least, I think that covers what was discussed yesterday!) In case you care to include any additional information in your letter, here are the names and dates of the documents related to this project: The original letter from the Lake Riley Improvement Association that requested the petition was dated November 26, 2002. The petition and accompanying resolution from the City of Chanhassen were passed on January13, 2003. The latest document to be produced by the RPBCW D is entitled "Engineer's Report: Lake Riley Water Quality Improvement Project" and is dated May 5, 2004. Let me know if you have questions. And enjoy the graduation festivities! Thanks! Lori Haak Water Resources Coordinator City of Chanhassen 7700 Market Boulevard P.O. Box 147 Chanhassen, MN 55317 Phone: 952.227.1135 Fax: 952.227.1935 Email: Ihaak@ci.chanhassen-mn.us Riley Purgatory Bluff Creek Watershed District Web Site: http//www.rileypurgatorybluffcreek.org May 25, 2004 Mr. Ronald Hamack Director Board of Water and Soil Resources One West Water Street Suite #200 St. Paul, MN 55107 - Legal Advisor: Krebsbach & Haik 701 4th Avenue South, Suite 500 Minneapolis, MN 55415 612 333-7400 Fax: 612 333-6959 Engineering Advisor. Barr Engineering 4700 West 77th Street Minneapolis, MN 55435 952 832-2600 Fax: 952 832-2601 Re: Engineer's Feasibility Report: Lake Riley Water Quality Improvement Project Dear Mr. Hamack: In accordance with Minnesota Statutes, Section 103D.711, Subdivision 5, the Riley -Purgatory -Bluff Creek Watershed District requests that the Board of Water and Soil Resources review the enclosed Engineer's Feasibility Report for the Lake Riley Water Quality Improvement Project. It is the intent of the District to schedule a public hearing for the project as soon as the comments from the review agencies have been received. Receipt of your advisory report within the 30 day time frame as outlined in the Statute would be appreciated. Thank you for your assistance in this matter. If you have any questions or request additional information, please call me at (952) 832-2857. Sincerely, obert C. Obermeyer Barr Engineering Company Engineers for the District Enclosure c: Board of Managers Paul Haik Leslie Stovring Lori Haak ::O DMA\PC DOCS\DOCS\243936\l Board of Managers Howard Peterson Perry Forster Conrad Fiskness Philip Wright Susan Scribner Riley Purgatory Bluff Creek Watershed District Web Site: http//www.rileypurgatorybluffcreek.org May 25, 2004 Mr. Kent Lokkesmoe Director, Division of Waters Minnesota Department of Natural Resources 500 Lafayette Road St. Paul, MN 55155 Legal Advisor: Krebsbach & Haik 701 4th Avenue South, Suite 500 Minneapolis, MN 55415 612 333-7400 Fax: 612 333-6959 Engineering Advisor: Barr Engineering 4700 West 77th Street Minneapolis, MN 55435 952 832-2600 Fax: 952 832-2601 Re: Engineer's Feasibility Report: Lake Riley Water Quality Improvement Project Dear Mr. Lokkesmoe: In accordance with Minnesota Statutes, Section 103D.711, Subdivision 5, the Riley -Purgatory -Bluff Creek Watershed District requests that the Minnesota Department of Natural Resources review the enclosed Engineer's Feasibility Report for the Lake Riley Water Quality Improvement Project. It is the intent of the District to schedule a public hearing for the project as soon as the comments from the review agencies have been received. Receipt of your advisory report within the 30-day time frame as outlined in the Statute would be appreciated. Thank you for your assistance in this matter. If you have any questions or request additional information, please call me at (952) 832-2857. Sincerely, Robert C. Obermeyer Barr Engineering Company Engineers for the District c: Board of Managers Paul Haik Leslie Stovring Lori Haak ::O DMA\PCDOCS\DOCS\243937\ 1 Board of Managers Howard Peterson Perry Forster Conrad Fiskness Philip Wright Susan Scribner Engineer's Report Lake Riley Water Quality Improvement Project (Lake Riley and Rice Marsh Lake) Petitioned by the Cities of Chanhassen and Eden Prairie Prepared for the Riley -Purgatory -Bluff Creek Watershed District July 30, 2003 Engineer's Report Lake Riley Water Quality Improvement Project (Lake Riley and Rice Marsh Lake) Petitioned by the Cities of Chanhassen and Eden Prairie Prepared for the Riley -Purgatory -Bluff Creek Watershed District July 30, 2003 4700 West is, Minneapolis, MNN SM 55435 Phone: (952) 832-2600 BARR Far: (952) 832-2601 I 1 Engineer's Report tLake Riley Water Quality Improvement Project (Lake Riley and Rice Marsh Lake) ' Riley -Purgatory Bluff Creek Watershed District: Basic Water Management Project Table of Contents 1.0 Introduction............................................................................................................................... 1 ' 2.0 Background Information............................................................................................................ 2 3.0 Description of Project Lakes and Watersheds............................................................................. 3 3.1 Lake Riley........................................................................................................................ 3 ' 3.2 Rice Marsh Lake............................................................................................................... 3 4.0 Proposed Improvement Plan.....................................................................................................13 ' 4.1 Rice Marsh Lake............................................................................................................. 13 4.2 Lake Riley...................................................................................................................... 13 4.3 Cost Estimate.................................................................................................................. 15 4.3.1 Rice Marsh Lake.................................................................................................. 15 4.3.2 Lake Riley........................................................................................................... 15 t4.4 Permits........................................................................................................................... 15 4.5 Affected Property Owners............................................................................................... 15 ' 5.0 Impacts Caused by the Project..................................................................................................16 6.0 Recommendations....................................................................................................................17 ' References.......................................................................................................................................18 1 1 ' ODMATCDOCS\DOCS\241305\1 I 1 I 1 1 11 t List of Tables Table 1 Riley -Purgatory -Bluff Creek Watershed District Lake Management Table......................................5 Table 2 Estimated Water Quality Conditions (TSIsn ) for Lake Riley and Rice Marsh Lake, Assuming Current (1998) and Ultimate Watershed Land Use Conditions, Varying Climatic Conditions (Average, Wet and Dry Precipitation Years), and Current District Runoff Management Rule - Mandated Stormwater Detention Only..........................................................................................11 Table 3 Predicted Lake Water Quality Conditions (TSIsn) Following Project Implementation...................16 List of Figures Figure1 Lake Riley Watershed....................................................................................................................4 Figure 2 Lake Riley and Rice Marsh Lake Total Phosphorus-1971 through 2002........................................ 8 Figure 3 Lake Riley Watershed Land Uses Under Existing Land Use Conditions..........................................9 Figure 4 Lake Riley Watershed Land Uses Under Proposed Future Land Use Conditions ...........................10 Figure 5 Proposed Trunk Highway 312 Treatment Pond Locations Under Proposed Conditions .................. 14 ' List of Appendices Appendix A Project Petitions from Eden Prairie and Chanhassen ' Appendix B Lake Riley UAA Executive Summary Appendix C Affected Property Owners 1 ' ::ODMA\PCDOCS\DOCS\241305\1 li 1.0 Introduction This report summarizes the proposed actions for improving the water quality of two lakes in the cities of Chanhassen and Eden Prairie, including: • Lake Riley • Rice Marsh Lake It is prepared in accordance with Section 103D.711 of the Minnesota Watershed Act under the direction of the Board of Managers of the Riley -Purgatory -Bluff Creek Watershed District, upon petition by the cities of Chanhassen and Eden Prairie (see Appendix A). ::ODMA\PCDOCS\DOCSV41305U 1 2.0 Background Information The Riley -Purgatory -Bluff Creek Watershed District (District) was established by the Minnesota Water Resources Board in 1969, acting under authority of the Watershed Law. As charged by the law and the order establishing the District, the general purpose of the District is to protect public health and welfare and to provide for the provident use of natural resources. The District carries out these purposes through planning, permit issuance, flood control, and conservation projects. The District is located in the southwestern portion of the Twin Cities Metropolitan Area, encompassing an area of 47.3 square miles. There are three major subwatersheds within the District —Riley Creek, with a watershed area of 10.0 square miles; Purgatory Creek, with a water area of 31.4 square miles; and Bluff Creek, with a watershed area of 5.9 square miles. All three creeks discharge to the Minnesota River. Stormwater management within the urbanizing watershed was guided initially by the District's Overall Plan dated 1973. The 1973 Overall Plan guided development within District until it was further revised in May 1996 (Water Management Plan in accordance with the Metropolitan Surface Water Management Act and Watershed Law: Minnesota Statutes Chanters 103B and 103D, respectively. The water quality improvement projects recommended in this Engineer's Report for Lake Riley and Rice Marsh Lake are the outcome of a Use Attainability Analysis (UAA) prescribed by the 1996 Riley -Purgatory -Bluff Creek Watershed District Water Management Plan, and conducted during 1998-2002 (see Appendix B). ' ::ODMA\PCDOCS\DOCS\241305\1 2 I I I 1 1 1 t 1 0 3.0 Description of Project Lakes and Watersheds The UAA for Lake Riley and Rice Marsh Lake (Figure 1) was completed to provide the scientific foundation for lake -specific management plans that will preserve existing —or achieve potential — beneficial uses of the lakes. The UAA is a structured, scientific assessment of the factors affecting attainment of a beneficial use, both currently and under ultimate watershed development conditions. "Use Attainment" refers to achievement of water quality conditions suitable to support lake -specific beneficial uses such as swimming, fishing, wildlife habitat, and esthetic viewing among others, as designated in the 1996 Water Management Plan. 3.1 Lake Riley Lake Riley is designated as a Level I "swimming lake" by the District (see Table 1) and, as such, its water quality condition should score 53, or less, on the Carlson's Trophic State Index (Secchi disc basis, TSIsD) rating system. This index score is calculated from the interrelationships between summer Secchi disc transparencies and epilimnetic concentrations of chlorophyll a and total phosphorus. (The index results in scoring generally in the between zero and one hundred; lower score being indicative of better lake water quality.) A TSIsD score of 53 corresponds to a total phosphorus concentration of 40 µg/L for lakes in the Central Hardwood Forests ecoregion of Minnesota. (MPCA. 1997. Lake Prioritization for Protecting Swimmable Use.) 3.2 Rice Marsh Lake Rice Marsh Lake has been designated as a "fishing lake" by the District despite the fact that the Minnesota Department of Natural Resources (Mn/DNR) does not actively manage the lake by stocking it. As such a "fishing" resource, Rice Marsh Lake has a water quality goal of TSIsD =_ 62, which corresponds to the water transparency criterion for the Ecological Use Classification set by the Mn/DNR for lake fisheries and associated aquatic communities in Rice Marsh Lake (Schupp, D., 1992. An Ecological Classification of Minnesota Lakes with Associated Fish Communities. Mn/DNR Investigational Report No. 417.) This TSIsD score corresponds to a total phosphorus concentration in the range of 84 to 188 µg/L, similar to the District's total phosphorus concentration range goal of 75 to 105 µg/L for Level III fishing lakes (supporting fish and wildlife populations, and provide aesthetic viewing). ::ODMAiPCDOCS\DOCS\241305 V 1 1 1 1 1 1 Seven County Metro Area r RILEY PURGATORY — BLUFF CREEK WATERSHED DISTRICT Labe Lucy, Lake " u' Ann ! '' C R eY °a* Rice Marsh.. `.. . Lake '? W o a000 a000 Scale in Feet ® Areas Not Contributing to Figure 1 Surface Water Drainage LAKE RILEY WATERSHED 4 0 Table 1 Riley -Purgatory -Bluff Creek Watershed District Lake Management Table: Water Quality, Recreational Use and Ecological Classification of, and Management Philosophies for Minnetonka Lakes, Referencing Carlson's Trophic State Index (TSI) Values (Secch[ Disc Transparency Basis) Lake Classification, By Regulatory Agency Current Water MPCA" Metro Council District Quality Conditions Swimmable Priority Waters Mn/DNR` Ecological Management Lake (TSIsD)' District Water Quality Goal Use ClassZ Class Municipal Use' Class' Strategy Riley Year of Record = 2002 TSIsD < 53 III 2 RD 24 Full Support TP = 47 pg/L Partially- Multi -use Swim Primary Fish Species: of Swimming and Chia = 40 pg/L Supporting Recreational NP, BLB, BG Designated SD = 1.4 in TSIsD < 56 Fishing TSIsD = 55 Activities Rice Marsh Year of Record = 1997 TSIsD =_ 62 Unspecified 3 NE 42 Full support of TP = 153 pg/L Single -Use Fish Primary Fish Species'. fishing plus waterfowl and Chia = 81 pg/L Recreational WS, BLB, BG habitat SD = 0.5 in requirements. requirements. TSIsD = 70 'TSISD Carlson's Trophic State Index score. This index was developed from the interrelationships between summer Secchi disc transparencies and epilimnetic concentrations of chlorophyll a and total phosphorus. The index results in scoring generally in the range between zero and one hundred. [District values calculated by Barr Engineering Company (from field data and water quality model predictions). MPCA values taken from the 1994 Clean Water Act Report to the U.S. Congress; and Mn/DNR values taken from Schupp (1992) Minnesota Department of Natural Resources Investigation Report No. 417. An ecological classification of Minnesota lakes with associated fish communities.] 'MPCA = Full supports of swimmable use. II = Full support of swimmable use, but threatened. III = Partial support of swimmable use. IV = Non-support of swimmable. ::ODMA\PCDOCS\DOCS\241305\ 1 Table 1 (Cont.) III IIIII� � Riley -Purgatory -Bluff Creek Watershed District Lake Management Table: Water Quality, Recreational Use and Ecological Classification of, and Management Philosophies for Minnetonka Lakes, Referencing Carlson's Trophic State Index (TSI) Values (Secchi Disc Transparency Basis) 'City SWIM = Public swimming beach FISH = Designated fishing resource 'Mn/DNR Mn/DNR Shoreland and Management Classification System: NE = Natural Environment RD = Recreational Development GD = General Development Lake Lake Classes 24, 30 and 32 are good permanent fish lakes. Class 38 may be subject to occasional winterkill winterkill frequently Classes 42 and 43 may be better suited for wildlife than for fish. NP = Northern Pike WS = White Sucker CA = Carp BG = Bluegill BG = Bluegill YB = Yellow Bullhead BLB = Black Bullhead Classes 42 and 43 are marginal fish lakes, and may BLB - Bullhead *Mn/DNR and MPCA TSI scores were provided by those agencies without evaluation by District. The MDNR TSISD score represents the third quartile transparency condition of the Ecological Class 4 lakes evaluated. ::ODMA\PCDOCS\DOCS\241305\ I The current summer average total phosphorous concentration of Rice Marsh Lake is approximately 150 µg/L, down from an observed peak of 710 µg/L: in 1972 (see Figure 2), shortly after the cessation of treated wastewater discharges to the lake. Prior to that date, the lake was the receiving water for wastewater discharges from the Chanhassen municipal —and Lakeview Hills Apartment — wastewater treatment plants. Consequently, Rice Marsh Lake sediments are rich in phosphorus subject to release into the overlying lake water during summer periods of sediment anoxia. Data contained in the Lake Riley UAA demonstrate that the phosphorous concentrations of Riley Creek waters increased by a factor of approximately 3 as the creek passes through Rice Marsh Lake. This indicates that the lake sediments are acting as a "nutrient pump", resulting in an increased phosphorus load to Lake Riley. The summer average total phosphorus concentration of Rice Marsh Lake has declined exponentially over the past 32 years as the deposited phosphorus in its sediment have been released and flushed through the system, and as new, less fertile sediments have buried the phosphorus -rich deposits (see Figure 2). This has resulted in a generally declining phosphorus load to Lake Riley and its water quality is somewhat improved as a result. Trend analyses indicate Lake Riley total phosphorus concentrations have steadily declined over a 30-year period, from about 80 µg/L in the early-1970s to about 40 µg/L in the late-1990s. However, more recent data suggest phosphorus concentrations may now be rising as the lake's watershed is urbanizing. Figures 3 and 4 contrast the existing and predicted future watershed land uses within the portion of the Lake Riley watershed downstream from Rice Marsh Lake. As is clearly evident in Figure 4, much of the currently natural, open space will be developed into suburban residential land use. Similarly, all agricultural lands will be converted to residential land use, or lost to construction of Trunk Highway 312. Analyses of the likely impacts of watershed land use changes on in -lake water quality conditions, using sophisticated computer simulation models, suggest that change is likely. In general, under existing watershed land use conditions, Lake Riley water quality is best under near - average to dry weather (see Table 2), with TSISD values meeting the District's goal of <53. Poorer water quality has been observed in wetter -than -normal weather years. Evaluation of historical water quality data indicated the Lake Riley summer average TSIsD exceeded the District's goal during 9 of 16 years of record. This same pattern of poorer water quality in years with relatively wet conditions is expected to persist into the future, after ultimate watershed land use development has been achieved. ::ODMA\PCDOCS\DOCS\241305\1 1 1 1 1 1 1 1 Figure 2 Lake Riley and Rice Marsh Lake Total Phosphorus- 1971 through 2002 800 700 1 is - 0 300 200 t 100 0+- -- + -+ -- ---- - �- + J, 1965 1970 1975 1980 1985 1990 1995 2000 2005 Year — i — Lake Riley t Rice Marsh Lake Lake Riley Trend (1971-2002) Rice Marsh Lake Trend (1972-1997) P:\23\27kE61\RILEYTRE—EngrReport.yJs 7/31/2003 1:54 PM 1*1 0 t' LlnwOo Ct U 8llh Yt '> Land Use , Natural/Park/Open _ Developed Parkland Agricultural Low Density Residential ,aun Medium Density Residential L" High Density Residential fffm Highway commercial Open Water W W BNlt�r County Illohw., la fake Rllet- CI tPY U N. 1 9yc4 1 f,V (v�..mnnarw 'Y4 k. OVMMI Ti a 6 i' WW.rd or corner ry. b 44 .IAA �e t Turnbull Rd Ponds Watersheds Figure 3 w e LAKE RILEY WATERSHED LAND USES Flow Direction Contributing Area UNDER EXISTING LAND USE OMunicipal Boundary Noncontributing Area (No outlet) 900 0 s 900 1800 Feet CONDITIONS 0 1 m ?. Land Used 3 Natural/Park/Open Ns -•nw L Developed Parkland o A E .: A Agricultural menn CI Low Density Residential Medium Density Residential High Density Residential Highway Commercial Open Water V% m wvn,,1 I HlyliwnY ram 14;:. ,�.. Lnke Rile.r n_ 4 °Jr •AEI P�IMInMY &••�ti YU VYnilyk iI F or W000rd Di TUMWI Rd 11 lu :_ Ponds Watersheds Figure 4 1"/ E LAKE RILEY WATERSHED LAND USES Flow Direction Contributing Area UNDER PROPOSED FUTURE LAND USE Municipal Boundary Noncontributing Area (No outlet) 900 0 S 900 1800 Feet CONDITIONS ' Table 2 Estimated Water Quality Conditions (TSIsD ) for Lake Riley and Rice Marsh ' Lake, Assuming Current (1998) and Ultimate Watershed Land Use Conditions, Varying Climatic Conditions (Average, Wet and Dry Precipitation Years), and Current District Runoff Management Rule - Mandated Stormwater Detention Only. Trophic State Index (TSIso ) Value Average Year Wet Year Dry Year Watershed (1995 27-Inch (1983,41-Inch (1988,19-inch Lake Land Use District Goal Precipitation) Precipitation) Precipitation) Riley Current (1998) <53 53 64 49 Ultimate <53 51 52 50 Rice Marsh Current(1998) __ 62 77 77 79 Ultimate =_ 62 1 77 77 79 ' ::ODMA\PCDOCS\DOCSV41305\1 11 [1 1 1 Surprisingly, however, future Lake Riley water quality is predicted to be generally improved, presumably because agricultural lands without runoff water quality controls will be replaced by suburban residential and highway land uses that include runoff detention ponds, per current District runoff management rules. This is expected to result in a net decrease in phosphorus loading of the lake from watershed runoff. Loads will still be highest, and in -lake water quality poorest, during relatively wet years Although we predict the District's water quality goal (TSIsD <53) will be met, albeit minimally, under the wet -year (1983) weather conditions assumed in the UAA water quality modeling, more extreme conditions could result in non -attainment of the goal under ultimate watershed land use conditions, unless remedial measures are undertaken. Rice Marsh Lake water quality (TSIsD = 70) currently fails to meet the Riley -Purgatory -Bluff Creek Watershed District goal of TSIsD = 62, and its predicted to degrade somewhat (TSIsD =_ 77) as the lake's watershed approaches ultimate land use. Poorest Rice Marsh Lake water quality conditions are expected to occur in relatively dry years when less of the phosphorus recycled from anoxic lake sediments is flushed out into Lake Riley. ::ODMA\PCDOCS\DOCS\241305\I 12 1 4.0 Proposed Improvement Plan ' The UAA report contained in Appendix B of this Engineer's Report details the Improvement Plan ' summarized here. The Lake Riley Water Quality Improvement Project is comprised of the following management actions, both watershed and in -lake, as described below, by water body. ' 4.1 Rice Marsh Lake ' • Treat Rice Marsh sediments with a combination of aluminum sulfate (i.e., alum, AI2(SO4)3 n H2O) and calcium hydroxide (i.e., lime, Ca(OH)2) to immobilize potentially releasable phosphorus. Treatment is to be made at an areal dose rate (g/m2) dependent on the ' results of analyses of sediment cores for levels of labile (i.e., loosely bound) and iron -bound phosphorus in surficial deposits (E. Rydin and E.B. Welch. 1998. Aluminum Dose Required to Inactive Phosphate in Lake Sediments. Water Res. 32(1):2969-2076) ' • In cooperation with the Mn/DNR, construct rough fish barriers (2) between Rice Marsh Lake and Lakes Riley and Susan. The Mn/DNR hopes to isolate carp in Rice Marsh Lake where ' they will be subject to winterkill. If this is not effective, they will consider making a chemical treatment (e.g., rotenone) to remove rough fish at some later date. 1 4.2 Lake Riley ' • Treat Lake Riley with a combination of alum -plus -lime in a manner similar to that described above for Rice Marsh Lake. • In cooperation with Minnesota Department of Transportation (Mn/DOT), design and ' construct four or five runoff detention ponds that meet MPCA and NURP design guidelines to treat runoff from the planned Trunk Highway 312.. Locations of these runoff detention ' ponds are shown on the Figure 5. 1 1 ' ::ODMAWDOCS\DOCS\241305\1 13 1 4.11a A 522a 2 W* f E 413 5 500 0 500 1000 Feet Legend Flow Direction Proposed Watersheds Contributing NonContributing - _ Proposed Treatment Ponds Approximate Highway ROW G d R L Lake Riley Eas ., ... t Ct _ a ` Figure 5 y PROPOSED TRUNK HIGHWAY 312 ` TREATMENT POND LOCATIONS �'-- UNDER PROPOSED CONDITIONS 14 4.3 Cost Estimate The aggregate cost of the recommended improvements described in this Engineer's Report is $673,500. This total is comprised of the following subtotal elements: 4.3.1 Rice Marsh Lake Alum -plus -lime treatment...................................................................................... $120,000 Rough fish barriers (2) between Rice Marsh Lake and Lakes Riley and Susan ..... 150,000 Subtotal ............. $270,000 4.3.2 Lake Riley Alum -Plus -Lime Treatment .................................. ' Pond 4.1 la ........................................................... Pond4.13a........................................................... Pond5.22a........................................................... Pond 5.22a/5.23a.................................................. Pond 999.16a........................................................ Grand Total ................................ $200,000 ................................. $ 55,500 .................................... 23,000 ...................................... 5,500 .................................... 40,000 ............................... 79,500 Subtotal ............. $403,500 ................................ $673,500 The alum -plus -lime treatments of Lake Riley and Rice Marsh Lake will be undertaken immediately (2004). Rough fish barriers above and below Rice Marsh Lake will be constructed as soon as possible thereafter (2005), in coordination with Mn/DOT highway construction. Construction of Trunk Highway 312 runoff detention ponds will be done in cooperation with Mn/DOT as the highway is built in the future. 4.4 Permits Permits for the recommended improvements will be required by the cities of Chanhassen and Eden Prairie, the Riley -Purgatory -Bluff Creek Watershed District, and the Minnesota Department of Natural Resources. 4.5 Affected Property Owners Owners of the properties potentially affected by the recommended improvements are listed in Appendix C. ' ::ODMA\PCDOCS\DOCS\241305\I 15 I I 1 1 5.0 Impacts Caused by the Project No long-term adverse impacts to natural resources are expected to result from implementation of the recommended improvements. Some temporary construction -related impacts may occur to riparian wetlands, and mitigation may be required, but impacts are generally expected to be minor. Every effort possible will be made to avoid or minimize tree loss in connection with various aspects of the recommended projects. Trees that are unavoidably lost will be replaced, at the landowner's tdiscretion. 1 1 1 1 1 1 11 r- Expected benefits of completing the petitioned project are summarized, in terms of TSIsn values, in the following table (Table 3), which presents summer average water quality condition estimates (from P811n-Lake modeling). These predictions assume all elements of the recommended water quality improvement plan are implemented as described in the Lake Riley UAA report (Appendix B). Table 3 Predicted Lake Water Quality Conditions (TSIsn) Following Project Implementation Tro hic State Index (TSIsn) Value Recently Observed Average Year Wet Year Dry Year Watershed Conditions District (1995 27-Inch (1983, 41-Inch (1988, 19-inch Lake Land Use (Yr. of Record) Goal Precipitation) Precipitation) Precipitation) Riley Current (1998) 55 (2002) <53 39 39 38 Ultimate 39 40 44 Rice Marsh Current (1998) 77 62 65 65 71 Ultimate 65 65 71 (1997) The result of the petitioned project will be improved Lake Riley water quality to a point where it consistently meets its goal, now and in future. Rice Marsh Lake water quality will also be improved, but is expected only to approach its goal. ' ::0DMA\PCD0CS\D0CS\241305V 16 6.0 Recommendations The Lake Riley Water Quality Improvement Project is a necessary and feasible part of the Overall Water Management Plan of the Riley -Purgatory -Bluff Creek Watershed District. The cities of Chanhassen and Eden Prairie have petitioned the District to undertake this work on a cooperative basis (see Appendix A). Because the project meets water quality management goals of the District without causing adverse impacts on natural resources of the area, it is recommended that the project be implemented as is generally described in this Engineer's Report. As plans and specifications for the recommended project elements are prepared, the District will consult with City staffs about plan details. City Engineering and Mn/DNR staff will be given draft plans for their review, comment and approval before a District public hearing on the project is held. Although the runoff detention ponding portion of the project is a "Structural" BMP, the District encourages the use of Low Impact Development (LID) BMPs (e.g., infiltration of runoff), wherever feasible, and will work with Mn/DOT to promote the use and incorporation of LID BMPs into final Trunk Highway 312 design plans, wherever possible. ' ::ODMA\PCDOCS\DOCS\741305\I 17 References Barr Engineering Co. 1973 Overall Water Management Plan of the Riley -Purgatory -Bluff Creek Watershed District. Prepared for Riley Purgatory -Bluff Creek Watershed District. Barr Engineering Co. 1996. Water Management Plan. Prepared for Riley Purgatory -Bluff Creek Watershed District. Barr Engineering Co. 2002. Lake Riley Use Attainability Analysis. Prepared for Riley Purgatory - Bluff Creek Watershed District. Barr Engineering Co. 1999. Rice Marsh Lake Use Attainability Analysis. Prepared for Riley Purgatory -Bluff Creek Watershed District. Minnesota Pollution Control Agency. 1997. Lake Prioritization for Protecting Swimmable Use. see page 3 Schupp, D. H. 1992. An Ecological Classification of Minnesota Lakes With Associated Fish Communities. Investigational Report 417, 1992. Minnesota Department of Natural Resources. t::ODMA\PCDOCS\DOCS\241305\1 M 1 Appendix A Project Petitions from Eden Prairie and Chanhassen CITY OF CHANHASSEN T700 Market Boulevard PO Box 147 Chanhassen, MN 55317 Administration Phone: 952.227.11 W Fax: 952.227.1110 Building Inspections Phow 952.227.1180 Fax: 952.227.1190 Engineering Phone: 952.227.1160 Fax: 952.227,1170 Finance Phone: 952.227.1140 Fax: 952.227.1110 Park & Recreation Phone: 952.227.1120 Fax: 952.227.1110 Recreation Center t 2310 Coulter Boulevard Phone: 952.227.1400 Fax: 952.227.1404 t Planning & Natural Resources Phone: 952.227.1130 Fax: 952.227.1110 ' Public Works 1591 Park Road Phone: 952.227.1300 ' Fax:952227.1310 Senior Center ' Phone:112,227,1125 Fax: 952.227.1110 Web Site ' wwwuchanhassen.mn.us 1 1 January 21, 2003 Riley Purgatory Bluff Creek Watershed District c/o Mr. Robert Obermeyer Barr Engineering 4700 West 77`s Street Minneapolis, MN 55435 Re: Petition Regarding Lake Riley and Rice Marsh Lake Basic Water Management Projects Dear District Managers and Mr. Obermeyer: Enclosed please find the fully executed petition for the above projects. Please note that the cost to the City may not exceed $100,000 unless prior written approval is obtained from the City. If you have questions or require additional information, feel free to contact me at 952.227.1135. I look forward to working with you on these projects. Sincerely, CITY OF CHANHASSEN lVV/ Lori Haak Water Resources Coordinator G:IENGU.ori\Lk MgtntV2iley\Petition Cover Letter.doc The City of Chanhassen • A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play. PETITION OF THE CITY OF CHANHASSEN TO RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT FOR THE LAKE RILEY AND RICE MARSH LAKE BASIC WATER MANAGEMENT PROJECTS I. AUTHORITY The City of Chanhassen petitions the Riley Purgatory Bluff Creek Watershed District, pursuant to the provisions of the Minnesota Statutes Sections 103D.201, 103D.605, 103D.705, and 103D.905, to undertake a basic water management project to protect and improve the water quality in Lake Riley and Rice Marsh Lake. 111000MUM-10030 The purpose of the project is to improve the water quality of Lake Riley by reducing internal and external sources of phosphorus in and to the lake that contribute to alga growth, resulting in decreased water quality, clarity and transparency. The Minnesota Board of Water and Soil Resources approved and the Riley Purgatory Bluff Creek Watershed District Board of Managers adopted a watershed management plan that assessed the condition of the lake through determination of its physical, chemical and biological qualities. The approved and adopted watershed management plan dated May 1996 is incorporated by reference. This project in the cities of Chanhassen and Eden Prairie will help remedy water quality impacts from: 1) municipal sewage treatment discharges that were made to Rice Marsh Lake through the early 1970s; 2) future construction of T.H. 312 between Lake Riley and Rice Marsh Lake; and 3) increased urbanization within the watershed. The Lake Riley and Rice ' Marsh Lake Use Attainability Analyses dated April 2002 and November 1999 respectively are incorporated by reference. 1 M. GENERAL DESCRIPTION OF WORK PROPOSED AND PURPOSES The project proposes application of alum -plus -lime treatments and storm water management improvements to improve the water quality of the Lake Riley and Rice Marsh Lake. Application of the alum -plus -lime treatments will remediate prior municipal sewage treatment discharges, while the storm water management improvements will limit impacts from the highway construction and increased urbanization within the lake watershed. Through 1972, the City of Chanhassen discharged treated sewage wastewater into Rice Marsh Lake, resulting in high phosphorus levels within the sediments on the bottom of the lake. Although wastewater discharges were discontinued, the excess phosphorus from years of discharge continues to degrade the water quality of Lake Riley via flows from Riley Creek. Approximately 54% of the phosphorus entering Lake Riley flows from Rice Marsh Lake through Riley Creek. Phosphorus recycled from Rice Marsh Lake sediments into Riley Creek waters is a major contributor the phosphorus draining into Lake Riley. Proposed water quality improvements are expected to reduce the phosphorus recycled from lake sediments to the overlying lake water that would otherwise support alga growth or blooms. Within the City of Chanhassen, the project includes a proposal to treat Lake Riley and Rice Marsh Lake with an alum -plus -lime slurry. The proposal also calls for upgrading five (5) existing storm water management basins and the construction of four (4) new storm water basins. The new and upgraded basins will conform to the standards for the National Urban Runoff Ponding Basins and the requirements of the Minnesota Pollution Control Agency. 1 Petition of the City of Chanhassen of Riley -Purgatory -Bluff Creek Watershed District Riley and Rice Marsh Lake Basic Water Management Projects ' January 2003 Page 2 of 3 ' Overall the project will increase the recreational use of swimming in Lake Riley by reducing the phosphorous loads to the lake thereby limiting the number of days the actual water quality exceeds the standard for recreational swimming. This is a Trophic State Index (TST) of 53 (<40 mg1l) which is the guidance published by the Minnesota Pollution Control ' Agency to assess full support for primary contact recreation and aesthetics. The project intends continued monitoring and re-evaluation of the effect of constructing the ' proposed improvements for the purpose of determining whether additional controls are required. The proposed work is consistent with additional controls, if required to maintain the existing beneficial uses of Riley and Rice Marsh Lakes. ' IV. DESCRIPTION OF THE LANDS OVER WHICH THE PROPOSED IMPROVEMENTS ARE LOCATED ' The project will be located on property that is directly or indirectly tributary to Lake Riley, Rice Marsh Lake and Riley Creek that is located on the eastern and western boundaries of Chanhassen and Eden Prairie respectively. Within Chanhassen, the project will be located in ' the general area west of Dell Road and east of Trunk Highway 101 between Pioneer Trail and Trunk Highway 5 in the City of Chanhassen. The improvements are described in detail in the Riley and Rice Marsh Lake Use Attainability Analyses, which are incorporated by reference. ' V. GENERAL DESCRIPTION OF THE PART OF THE DISTRICT AFFECTED The affected lands are located in the cities of Chanhassen and Eden Prairie and include the riparian and tributary drainage areas to Lake Riley, Rice Marsh Lake and Riley Creek. ' Generally, the affected areas are south of Trunk Highway 5, east of Trunk Highway 101, and north of Pioneer Trail. The approximate centerline of the affected property is located along the municipal boundary between Chanhassen and Eden Prairie. ' Rice Marsh Lake is located in the cities of Chanhassen and Eden Prairie and has a 821-acre watershed containing woodlands, marsh, residences, parks and open spaces. The lake's direct watershed consists of 378 acres of low and moderate density housing, 348 acres of parks and open space, 50 acres of industrial and 26 acres of commercial land use. Riley Creek is the outlet from Rice Marsh Lake to Lake Riley. Riley Creek has a 10 square mile watershed, with mild topography in the upper and middle portions of the watershed and a steep, north -valley wall of the Minnesota River on the ' downstream end of the watershed. Riley Creek originates from lakes Lucy and Ann, and flows through Lake Susan, Rice Marsh Lake and Lake Riley before it begins its descent to the Minnesota River. This project will focus on the stretch of the creek between Rice Marsh ' Lake and Lake Riley. Finally, Lake Riley has a direct drainage area of 818 acres consisting of 449 acres of low - density residential, 286 acres of parks and open, 1 acre of commercial, and 82 acres of ' agricultural property. The lake has a maximum depth of approximately 50 feet, and a mean depth of approximately 23 feet. Water flows from Rice Marsh Lake to Lake Riley through Riley Creek. Lake Riley's total drainage area, including both direct and indirect drainage, is ' over 4,500 acres. VI. NEED AND NECESSITY FOR THE PROPOSED HAPROVEMENT Prior years of municipal wastewater discharges to Rice Marsh Lake has deposited excessive ' Petition of the City of Chanhassen of Riley -Purgatory -Bluff Creek Watershed District Riley and Rice Marsh Lake Basic Water Management Projects ' January 2003 Page 3 of 3 amounts of phosphorus that untreated will impact Lake Riley for decades. The continued ' development in tributary areas and the scheduled construction of T.H. 312 between Lake Riley and Rice Marsh Lake necessitates water quantity management and treatment of water quality to protect and improve the scenic, recreational and wildlife of those specific lakes and ' the overall water quality of the District. VII. THE PROPOSED IMPROVEMENT WILL BE CONDUCIVE TO THE PUBLIC ' HEALTH, CONVENIENCE AND WELFARE The City of Chanhassen petitions for the project because it will be conducive to the public health, convenience and welfare of the District and the City. Completion of the project, and ' associated recreational improvements, will preserve and enhance the public use and enjoyment of Riley and Rice Marsh Lakes and their adjacent parks, all of which are significant natural resources of the District and region. ' VIR. FINANCING OF THE PROPOSED IMPROVEMENT The project is identified in the Riley Purgatory Bluff Creek Watershed District Water Management Plan and is a priority project of common benefit to the entire District. ' Minnesota Statutes Section 103D.905, Subdivision 3 provides for the project financing of the basic water management features of the project. The District will fund 100% of the costs of ' the project with the exception of any easement or property acquisition. The City will share (75%) in the cost of the cost of any such acquisitions. The cost to the City may not exceed $100,000 unless prior written approval is obtained from the City. ' DX. PROJECT ABANDONMENT The City of Chanhassen hereby states and acknowledges that it will pay all costs and ' expenses that may be incurred by the activities described in this petition in the event the project is dismissed, no construction contract is let, or the City withdraws its project petition. CITY OF CHANHASSEN Mayor of City of Chanhassen CITY OF CHANHASSEN City Manager 0'ffx city � Ecfen prairie 8080 Mitchell Road • Eden Prairie, MN 55344-4485 • edenprairie.org • 952-949-8300 • TDD 952-949-8399 ' January 6, 2003 ' Mr. Bob Obermeyer Riley -Purgatory -Bluff Creek Watershed District c/o Barr Engineering ' 4700 W. 77 Street Minneapolis, MN 55435-4803 ' Re: Riley and Rice Marsh Lake Basic Water Management Project Petition and Resolution Dear Mr. Obermeyer: ' Enclosed is a signed copy of the Petition and Resolution of the City of Eden Prairie to the Riley - Purgatory -Bluff Creek Watershed District for the Lake Riley and Rice Marsh Lake Water ' Management Projects. The petition and resolution include a funding request for the following items. ' • Upgrade of two existing stormwater ponds to meet NURP standards. • Treat each lake with an alum product to remove phosphorus from the water column. ' Also attached to this petition are letters of support from the Wynnfield Homeowners Association on Rice Marsh Lake and the Lake Riley Improvement Association Thank you for your tassistance. Sincer L slie A. S vring Envirnn .ntal Cnnr linatn ' CITY OF EDEN PRAIRIE HENNEPIN COUNTY, NIINNESOTA ' RESOLUTION NO.2003-13 ' RESOLUTION RELATING TO THE RILEY AND RICE MARSH LAKE WATER QUALITY IMPROVEMENT PROJECTS I.C. # 03-5589 WHEREAS, Lake Riley and its tributary lake, Rice Marsh Lake, are important features within the City of Eden Prairie; and ' WHEREAS, the City Council is committed to water quality improvement within Lake Riley and Rice Marsh Lake; and ' WHEREAS, there is a documented relationship between deteriorating water quality within Riley Lake and the historical discharge of treated sewage wastewater into Rice Marsh Lake as well ' as the current stormwater ponding system; and ' WHEREAS, the City of Eden Prairie has detemvned that improvements to the lake water quality, stormwater treatment system and fishery habitat are required to fully realize the recreational potential of the lakes. ' NOW, THEREFORE, BE IT RESOLVED, the City Council desires to complete those items recommended within the Riley and Rice Marsh Lake Use Attainability Analyses to improve ' the water quality of Lake Riley and Rice Marsh Lake and hereby approves the attached petition to the Riley -Purgatory -Bluff Creek Watershed District to: ' Upgrade two existing stormwater ponds that do not meet NURP standards, and • Treat each lake with an alum product to remove phosphorus from the water column. ' BE IT FURTHER RESOLVED, the City Council does request that the Riley -Purgatory - Bluff Creek Watershed District participate in funding these activities with a cost share of 25 to 100% as defined in the attached petition. ' ADOPTED by the Eden Prairie City Council January 21, 2003. Ron Case, Acting Mayor ' ATTEST: SEAL Kathleen Porta, City Clerk I l I ' PETITION OF THE CITY OF EDEN PRAIRIE TO ' RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT FOR THE LAKE RILEY AND RICE MARSH LAKE BASIC WATER MANAGEMENT PROJECTS ' I. AUTHORrrY ' The City of Eden Prairie petitions the Riley Purgatory Bluff Creek Watershed District, pursuant to the provisions of the Minnesota Statutes Sections 103D.201, 103D.605, 103D.705, and 103D.905, to undertake a basic water management project to protect and improve the water quality in Lake Riley and ' Rice Marsh Lake. II. PURPOSE ' The purpose of the project is to improve the water quality of Lake Riley by reducing internal and external sources of phosphorus in and to the lake that contribute to alga growth, resulting in decreased water quality, clarity and transparency. The Board of Water and Soil Resources approved and the Board ' of Managers adopted a watershed management plan that assessed the condition of the lake through determination of its physical, chemical, and biological qualities. The approved and adopted watershed management plan dated May 1996 is incorporated by reference. ' The proj ect for the cities of Eden Prairie and Chanhassen will help remedy water quality impacts from: 1) municipal sewage treatment discharges that were made to Rice Marsh Lake through the early 1970's; ' 2) protect against future water quality degradation from the construction of T.H. 312 between Lake Riley and Rice Marsh Lake; and 3) increased urbanization within the watershed. The Riley and Rice Marsh Lake Use Attainability Analyses dated April 2002 and November 1999 respectively are ' incorporated by reference. III. GENERAL DESCRIPTION OF WORK PROPOSED AND PURPOSES The project proposes application of alum -plus -lime treatments and stormwater management improvements to improve the water quality of the Lake Riley and Rice Marsh Lake. Application of the alum -plus -lime treatments will remediate prior municipal sewage treatment discharges, while the ' stormwater management improvements will limit impacts from the highway construction and increased urbanization within the lake watershed. Through 1972, the City of Chanhassen discharged treated sewage wastewater into Rice Marsh Lake, ' resulting in high phosphorus levels within the sediments on the bottom of the lake. Although wastewater discharges were discontinued, the excess phosphorus from years of discharge continues to ' degrade the water quality of Lake Riley via flows from Riley Creek. Approximately 54% of the phosphorus entering Lake Riley flows from Rice Marsh Lake through Riley Creek. Phosphorus recycled from Rice Marsh Lake sediments into Riley Creek waters is a major contributor the phosphorus draining ' into Lake Riley. Proposed water quality improvements are expected to reduce the phosphorus recycled from lake sediments to the overlying lake water that would otherwise support alga growth or blooms. Within the City of Eden Prairie, the project includes a proposal to treat Riley and Rice Marsh Lakes t with an alum plus lime slurry. The proposal also calls for upgrading two (2) existing storm water management basins. The new and upgraded basins will conform to the standards for the National Urban Runoff Ponding Basins and the requirements of the Minnesota Pollution Control Agency. ' Petition of the City of Eden Prairie of Riley -Purgatory -Bluff Creek Watershed District Riley and Rice Marsh Lake Basic Water Management Projects ' January 21, 2003 Page 2 of 3 ' Overall the project will increase the recreational use of swimming in Riley Lake by reducing the phosphorous loads to the lake thereby limiting the number of days the actual water quality exceeds the standard for recreational swimming. This is a Trophic State Index (TSI) of 53 (<40 mg1l), which is the ' guidance published by the Minnesota Pollution Control Agency to assess full support for primary contact recreation and aesthetics. ' The project intends continued monitoring and re-evaluation of the effect of constructing the proposed improvements for the purpose of determining whether additional controls are required. The proposed work is consistent with additional controls, if required to maintain the existing beneficial uses of Riley ' and Rice Marsh Lakes. IV. DESCRIPTION OF THE LANDS OVER WHICH THE PROPOSED IMPROVEMENTS ARE LOCATED The project will be located on property that is directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek that is located on the eastern and western boundaries of Chanhassen and Eden Prairie respectively. Within Eden Prairie, the project will be located in the general area west of Dell Road between Pioneer Trail and State Highway 5 in the City of Eden Prairie. The improvements are described in detail in the Riley and Rice Marsh Lake Use Attainability Analyses, which are incorporated by reference. V. GENERAL DESCRIPTION OF THE PART OF THE DISTRICT AFFECTED The affected lands are located in the cities of Eden Prairie and Chanhassen and include the riparian and tributary drainage areas to Lake Riley, Rice Marsh Lake, and Riley Creek. Generally, the affected areas are south of T.H. 5, east of T.H. 101, and north of Hennepin County Road 4. The approximate centerline of the affected property is located along the municipal boundary between Chanhassen and Eden Prairie. ' Rice Marsh Lake is located in the cities of Chanhassen and Eden Prairie and has a 821-acre watershed containing woodlands, marsh, residences, parks and open spaces. The Lake's direct watershed consists of 378 acres of low and moderate density housing, 348 acres of parks and open space, 50 acres of t industrial, and 26 acres of commercial land use. Riley Creek is the outlet from Rice Marsh Lake to Lake Riley. Riley Creek has a 10 square mile watershed, with mild topography in the upper and middle portions of ' the watershed and a steep, north -valley wall of the Minnesota River on the downstream end of the watershed. Riley Creek originates from lakes Lucy and Ann, and flows through Lake Susan, Rice Marsh ' Lake, and Lake Riley before it begins its descent to the Minnesota River. This project will focus on the stretch of the creek between Rice Marsh Lake and Lake Riley. Finally, Lake Riley has a direct drainage area of 818 acres consisting of 449 acres of single-family ' homes, 286 acres of parks and open, 1 acre of commercial, and 82 acres of agricultural property. The lake has a maximum depth of approximately 50 feet, and a mean depth of approximately 23 feet. Water flows from Rice Marsh Lake to Lake Riley through Riley Creek. Lake Riley's total drainage area, ' including both direct and indirect drainage, is over 4,500 acres. 1 1 Petition of the City of Eden Prairie of Riley -Purgatory -Bluff Creek Watershed District Riley and Rice Marsh Lake Basic Water Management Projects January 21, 2003 Page 3 of 3 VI. NEED AND NECESSITY FOR THE PROPOSED IMPROVEMENT Prior years ofmunicipal wastewater discharges to Rice Marsh Lake has deposited excessive amounts of phosphorus that untreated will impact Lake Riley for decades. The continued development in tributary areas and the scheduled construction of T.H. 312 between Lake Riley and Rice Marsh Lake necessitates water quantity management and treatment of water quality to protect and improve the scenic, recreational and wildlife of those specific lakes and the overall water quality of the District. VII. THE PROPOSED IMPROVEMENT WILL BE CONDUCIVE TO THE PUBLIC HEALTH, CONVENIENCE AND WELFARE The City of Eden Prairie petitions for the project because it will be conducive to the public health, convenience and welfare of the District and the City. Completion of the project, and associated recreational improvements, will preserve and enhance the public use and enjoyment of Riley and Rice Marsh Lakes and their adjacent parks, all of which are significant natural resources of the District and region. VM. FINANCING OF THE PROPOSED IMPROVEMENT The project is identified in the Riley Purgatory Bluff Creek Watershed District Water Management Plan and is a priority pmject of common benefit to the entire District. Minnesota Statutes Section 103D.905, Subdivision 3 provides for the project financing of the basic water management features of the project. The District will fund 100% of the costs of the project with the exception of any easement or property acquisition. The City will share (751/6) in the cost of the cost of any such acquisitions. IX PROJECT ABANDONMENT The City of Eden Prairie hereby states and acknowledges that it will pay all costs and expenses that may be incurred by the activities described in this petition in the event the project is dismissed, no construction contract is let, or the City withdraws its project petition. CITY OF EDEN PRAIRIE Mayor of City of Eden Prairie CITY OF EDEN PRAIRIE. City Manager I I I I I I I I 1 I i i I ' The following Lake Riley UAA Executive Summary is a placeholder for the complete document in this Review Draft. ' Executive Summary Lake Riley Use Attainability Analysis tPrepared for Riley -Purgatory -Bluff Creek Watershed District ' April 2002 Executive Summary Lake Riley Use Attainability Analysis Prepared for Riley -Purgatory -Bluff Creek Watershed District April 2002 Minn nu, sneer ea po Minneapolis, MN 55435 Phone: (952) 832-2600 BARR Fos: (952) 832-2601 Executive Summ Overview This report details the results of a Use Attainability Analysis (UAA) of Lake Riley. The UAA is a structured scientific assessment of the chemical, physical, and biological conditions in a water body. The analysis includes diagnosis of the causes of observed problems and prescription of alternative remedial measures (such as a diagnostic -feasibility study) that will result in the attainment of intended beneficial uses of Lake Riley. The analysis is based on historical water quality data, the results of an intensive 1997 through 1998 lake and watershed runoff water quality monitoring program, and computer simulations of watershed runoff, calibrated to the 1997 through 1998 data set. Computer simulations estimated watershed runoff under existing and proposed future land use conditions and under varying climatic conditions. Riley -Purgatory -Bluff Creek Watershed District Water Quality Goals ' The approved Riley -Purgatory -Bluff Creek Watershed District Water Management Plan, 1996, articulated five specific goals for Lake Riley. These goals address recreation, water quality, aquatic communities, water quantity, and wildlife. Wherever possible, Riley -Purgatory -Bluff Creek Watershed District (RPBCWD) goals for Lake Riley have been quantified using a standardized lake rating system termed Carlson's Trophic State Index (TSI). This rating system considers the lake's total phosphorus, chlorophyll a, and Secchi disc transparency measurements to assign it a water ' quality index number that reflects its general level of fertility. The resulting index values generally range between 0 and 100, with increasing values indicating more fertile conditions. Total phosphorus, chlorophyll a, and Secchi disc transparency are key water quality parameters upon which TSI statistics are computed, for the following reasons: Phosphorus generally controls the growth of algae in lake systems. Of all the substances needed for biological growth, phosphorus is typically the limiting nutrient. • Chlorophyll a is the main pigment in algae. Therefore, the amount of chlorophyll a in the water indicates the abundance of algae present in the lake. Secchi disc transparency is a measure of water clarity and is inversely related to the abundance of algae. Although any one or all three parameters can be used to compute TSI, water transparency is most often used, since people's perceptions of water clarity are most directly related to recreational use ::0DMA\PCD0CS\D0CS\229377\I ' impairment. The TSI rating system is scaled to place a mesotrophic (medium fertility level) lake on the scale between 40 and 50, and high and low fertility lakes (eutrophic and oligotrophic) toward the ' high and low ends of the TSI range, respectively. Characteristics of lakes in different trophic status categories are listed below with their respective TSI ranges: 1. Oligotrophic—[20 < TSI < 38] clear, low productivity lakes, with total phosphorus concentrations less than or equal to 10 µg/L, chlorophyll a concentrations less than or equal ' to 2 µg/L, and Secchi disc transparencies greater than or equal to 4.6 meters (15 feet). 2. Mesotrophic—[38 < TSI < 50] intermediate productivity lakes, with 10 to 25 µg/L total ' phosphorus, 2 to 8 µg/L chlorophyll a concentrations, and Secchi disc measurements of 2 to 4.6 meters (6 to 15 feet). 3. Eutrophic—[50 < TSI < 621 high productivity lakes, with 25 to 57 µg/L total phosphorus, 8 to 26 µg/L chlorophyll a concentrations, and Secchi disc measurements of 0.85 to 2 meters (2.7 to 6 feet). ' 4. Hypereutrophic—[62 < TSI ] extremely productive lakes, with total phosphorus concentrations greater than 57 µg/L, chlorophyll a concentrations greater than 26 µg/L, and Secchi disc measurements less than 0.8 meters (less than 2.7 feet). ' The RPBCWD goals for Lake Riley include the following: 1. The Recreation Goal is to provide water quality that: (1) fully supports swimming, applying the "MPCA Use Support Classification for Swimming Relative to Carlson's Trophic State Index by Ecoregion" (i.e., a Trophic State Index (TSIsD) of 53 or lower) and, (2) achieves a t water quality that fully supports the lake's MDNR ecological class 24 rating (i.e., a Trophic State Index (TSIsD) of 56 or lower). The goal is attainable, but only with the implementation of lake and watershed management practices as described in this UAA. 2. The Water Quality Goal is a trophic state index score that meets or exceeds the necessary level to attain and maintain full support of swimming and fishing: A Trophic State Index (TSIsD) of 53 or lower to fully support swimming and a Trophic State Index (TSIsD) of 56 or ' lower to fully support the lake's fishery. This goal is also attainable, but only with the implementation of lake and watershed management practices discussed in this UAA. 3. The Aquatic Communities Goal is a water quality that fully supports fishing, according to the Minnesota Department of Natural Resources (MDNR) `Ecological Use Classification." This goal is attainable, but only with the implementation of lake and watershed management practices listed herein. 4. The Water Quantity Goal for Lake Riley is to manage surface water runoff from a regional flood, the critical 100-year frequency storm event. This goal has been achieved. 5. The Wildlife Goal for Lake Riley is to protect existing, beneficial wildlife uses. The wildlife goal has been achieved. ' ::ODMA\PCDOCS\DOCS\229377\I ii Water Quality Problem Assessment An evaluation of 1971 through 1998 Lake Riley water quality data was completed to determine the lake's current water quality. Results of this evaluation indicate the lake's water quality has remained relatively stable over time. The lake's poor water quality is related to excessive inputs of phosphorus. Sources of phosphorus include: (1) runoff -borne phosphorus from its urbanized watershed; (2) Rice Marsh Lake internal loading (i.e., sediment phosphorus release and vegetation decay) conveyed to Lake Riley via Riley Creek; (3) Lake Riley internal loading (i.e., sediment phosphorus release); and (4) atmospheric deposition. Historical Water Quality Trends Trend analyses of 1974 through 1998 data indicate no significant change in the lake's water quality. The results of the regression analyses indicate that Secchi disc transparency has been declining at an average rate of 0.02 meters per year (less than 1 inch); chlorophyll a concentration in the epilimnion (upper 6 feet) has increased at the rate of 0.07 µg/L per year; total phosphorus concentration in the epilimnion has been decreasing at a rate of 1.2 µg/L per year. The changes in Secchi disc and total phosphorus are significantly different from zero, statistically, but the chlorophyll changes are not significant. Hence, the data indicate the lake's current water quality problems are unlikely to change unless management practices are implemented to improve the lake's water quality. A comparison of baseline (i.e., 1971 to 1987) and current (1988 to 1998) trophic state index (TSI) values indicates that Lake Riley has been unable to fully support swimmable use during the baseline and current periods. All but two summer averages exceeded MPCA-criteria (i.e., TSI <53) for full support swimmable use. Lake Riley's water quality has failed to meet MDNR-criteria during 36 percent of the baseline period and during 80 percent of the current period. Current Water Quality The current water quality of Lake Riley is poor, and recreational activities are impaired by summer algal blooms. The 1997 through 1998 total phosphorus concentration data indicate the lake was hypereutrophic (very poor water quality) during the spring and fall periods and eutrophic (poor water quality) during the summer period. Chlorophyll measurements during 1997 through 1998 indicate the lake was hypereutrophic (very poor water quality) during the fall of 1997 and during most of the 1998 summer period. Chlorophyll values during the fall of 1997, May of 1998, and late -June through August of 1998 exceeded nuisance levels (>20 µg/L). Secchi disc measurements during 1997 through 1998 ranged from oligotrophic (excellent) to hypereutrophic (very poor). Excellent transparency was noted during the winter, good transparency was noted during early -May, very poor ::ODMA\PCDOCS\DOCS\229377\1 ill transparencies were noted during the late -summer period, and poor transparencies were noted at other times during the monitoring period. Hence, moderate to severe recreational -use impairment occurred during the summer (Osgood, 1989). The lake's recreational -use impairment appear to be largely determined by algal abundance. Phosphorus Budget Lake Riley's 5,213-acre watershed is comprised of a 178-acre isolated watershed, a 1,585-acre direct watershed, and a 3,450-acre indirect watershed. Computer simulations of runoff water quality indicate that the annual total phosphorus load to Lake Riley under existing land use conditions varies from 670 pounds under dry climatic conditions (i.e., 19 inches annual precipitation) to 1,655 pounds under wet climatic conditions (i.e., 41 inches annual precipitation; See Figure EX-1). The average rate of phosphorus loading to the 286-acre lake is 3 pounds of phosphorus per acre of lake per year, which is excessive and causes water quality problems (L = 0.375 g/m2/yr). Computer simulations of runoff water quality indicate that an increased total phosphorus load will occur under proposed future land use conditions. Total phosphorus loads are estimated to vary from 785 pounds under dry climatic conditions (i.e., 19 inches of annual precipitation) to 1,849 pounds under wet climatic conditions (i.e., 41 inches annual precipitation; See Figure EX-2). The average rate of phosphorus loading to the 286-acre lake is estimated to be 4 pounds of phosphorus per acre of lake per year under proposed future land use conditions (L = 0.438 g/m2/yr). Increased phosphorus loading under proposed future land use conditions includes phosphorus loading ' from the proposed Highway 312 project. Assuming no new ponds are constructed to treat highway runoff waters, Lake Riley total phosphorus loading increases are expected to range from 34 pounds ' under dry climatic conditions (i.e., 19 inches of annual precipitation) to 74 pounds under wet climatic conditions (i.e., 41 inches annual precipitation). The Highway 312 total phosphorus load represents 5 percent of the total future phosphorus load to Lake Riley under dry climatic conditions (i.e., 19 inches of annual precipitation) and 4 percent under wet climatic conditions (i.e., 41 inches annual precipitation). Assuming all highway runoff waters are treated by ponds meeting MPCA- and NURP-criteria, total phosphorus loading increases are expected to range from 16 pounds under average climatic conditions (i.e., 27 inches of annual precipitation) to 25 pounds under wet climatic conditions (i.e., 41 inches annual precipitation). Lake Riley's annual phosphorus budget for an average precipitation year (i.e., 27 inches of precipitation) indicates approximately 58 percent of the lake's annual phosphorus load enters the lake from Riley Creek. Lake Riley's direct watershed contributes approximately 3 percent of the annual load to the creek, and approximately 55 percent of the lake's annual phosphorus load is the outflow from Rice Marsh Lake. Other watershed phosphorus sources each contribute from 0.2 to 10 percent of the lake's annual phosphorus load. Atmospheric deposition and the lake's internal load represent 7 and 8 percent of the annual phosphorus load, respectively (See Figure EX-3). ::0DMAXPCD0CS%D0CS122937T1 iv 1 1 Total Phosphorus Loads to Lake Riley ' Under Varying Climatic Conditions Existing Watershed Land Use 2000 ,,ss5 lbs. 1500 1000 a° 500 0 Wet (41 in.) ' Dry (19 in.) 1 1 1 1 'P:\23\27\053\rileyuaa\report\tpbudget.wb2:Avg. Yr. Figure EX-1 i Total Phosphorus Loads to Lake Riley Under Varying Climatic Conditions Proposed Future Watershed Land Use ' 1,849 2000 lb s. 1500 1000 CL 500 Wet (41 in.) ' Cal. (30 vry t i a m.) 1 ' P:\23\27\053\rileyuaa\report\tpbudget.wb2:Avg. Yr. Figure EX-2 I Lake Riley Phosphorus Budget: Sources Average Precipitation Year (27 Inches) ' Existing Watershed Landuse Internal Load (8.22%) Atmos. Dep. (6.77%) RM Outflow (54.64%) Inflow # 2.11 (1.34%) -Inflow # 3.11 (1.23%) 'I= Inflow # SP3 (2.31 %) --Inflow # 4.45 (9.76%) - -Inflow # 9.11 (1.51%) Dir. Watershed (7.61 %) r -Inflow Station #1 (3.56%; I Inflow # 6.11 (0.22%) Riley Cr. (Dir. Wat.) (2.839 Note: Lake Riley inflow locations are shown on Figure A-5 (Appendix A) Figure EX-3 ' P:\23\27\053\rileyuaa\report\tpbudget.wb2:Avg. Yr. Aquatic Plants Macrophyte (i.e., aquatic plant) surveys performed during 1998 determined that one undesirable non- native macrophyte species was present in Lake Riley. Eurasian watermilfoil typically follows an aggressive growth pattern and eliminates native species from a lake. Eurasian watermilfoil was found throughout Lake Riley. However, because most portions of the lake contain only two plant species, eradication of Eurasian watermilfoil would eliminate needed fisheries habitat. Consequently, preservation of this species is recommended. Recommended Goal Achievement Alternatives Two different lake improvement alternatives will achieve or exceed District goals for Lake Riley. The two alternatives are: • Manage Rice Marsh Lake (treat Rice Marsh Lake with alum and lime slurry) • Manage Rice Marsh Lake (treat Rice Marsh Lake with alum and lime slurry); Manage Lake Riley (treat Lake Riley with alum); and Treat Highway Runoff (treat Highway 312 runoff with four or five ponds meeting MPCA- and NURP-criteria) The two alternatives were evaluated to compare cost and benefit differences (See Table EX-1). Figure EX-4 compares the minimum and maximum costs of the two alternatives. Treatment of Rice Marsh Lake with a mixture of alum and lime slurry is expected to achieve the District's water quality goals for Lake Riley and is recommended. In addition, treatment of Lake Riley with alum is recommended to expedite goal achievement. Displacement of the higher phosphorus waters within Lake Riley with lower phosphorus waters from Rice Marsh Lake following its treatment may take several years. Hence, treatment of Lake Riley with alum is recommended to achieve rapid water quality improvement and rapid goal achievement. An alum treatment of Lake Riley will also remove the lake's internal phosphorus load for approximately 10 years, further improving the lake's water quality. Treatment of runoff waters from proposed Highway 312 by 4 or 5 ponds meeting MPCA- and NURP-criteria will minimize phosphorus loading increases to Lake Riley. Treatment of runoff waters will facilitate goal attainment by the two lake improvement alternatives discussed in the previous paragraph. ' ::ODMA\PCDOCS\DOCS\229377\1 viii $200,000 $1 Water Quality Recreation Lake Riley Costs to Meet or Exceed Goals Aw ANW Aquatic Communities GOALS Wildlife Water Quantity "Minimum Cost" is the cost of the option that just meets each of the goals set for Lake Riley under most climatic conditions. "Maximum Cost" is the cost of the most expensive option analyzed in this study that meets or exceeds each of the goals set for Lake Riley under all climatic conditions. ■Minimum Cost ■ Maximum Cost 1 Maximum Cost Minimum Cost DOLLARS Figure EX-4 Table EX-1 Benefits and Costs of Two Goal Achievement Alternatives Trophic State Index (TSIso) Value Wet year Average Year Dry Year Treatment and (1983) (1995) (1988) Estimated Management District 101 inches of (27 inches of (19 inches of Cost Activities Goal precipitation) precipitation) precipitation) (Dollars) Existing Watershed Land Uses Manage Rice Marsh <53 43 46 45 $200,000 Lake Manage Rice Marsh <53 39 39 38 $400,000 Lake and Lake Riley, Treat Highway Runoff Proposed Future Land Uses Manage Rice Marsh <53 46 48 49 $200,000 Lake Manage Rice Marsh <53 40 39 44 $400,000 Lake and Lake Riley, Treat Highway Runoff Selected Implementation Plan The selected implementation plan is Manage Rice Marsh Lake and Lake Riley, Treat Highway Runoff (treat Rice Marsh Lake with alum and lime slurry; treat Lake Riley with alum; and treat proposed Highway 312 runoff waters with four or five ponds meeting MPCA- and NURP-criteria). The selected plan provides the greatest benefit to Lake Riley and is expected to result in rapid goal achievement. Treatment of Rice Marsh Lake with alum/lime slurry will include: • Collection and analysis of Rice Marsh Lake sediment cores to determine the extractable phosphorus content of the upper 5 centimeters of lake sediment. • Lab experiments to determine the alum and lime slurry dose required to reduce Rice Marsh Lake internal loading to less than 10 percent of current levels. • Treatment of Rice Marsh Lake with selected dose of alum/lime slurry mixture. Lake Riley will be treated with an alum dose that is based upon the extractable phosphorus content of the upper 5 centimeters of lake sediment. A sediment core sample will be collected from the center of Lake Riley. The upper 5 centimeters of the core will be analyzed for extractable phosphorus. Alum dosage will be based upon a ratio of approximately 100 parts aluminum to 1 part extractable phosphorus. The proposed Highway 312 project will include the construction of 4 or 5 ponds meeting MPCA- and NURP-criteria to treat highway runoff waters. ::ODMA\PCDOCS\DOCS\229377\1 I I I I I I I I 1 I FI I I I I 1] t Affected Parcels - Carver County PID SNAME SITEADD NAME CITY STATE ZIP ZIP4 251820750 CHANHASSEN,CITY 0 CITY OF CHANHASSEN CHANHASSEN MN 55317 0147 253451130 CHANHASSEN,CITY 0 CITY OF CHANHASSEN CHANHASSEN MN 55317 0147 257400040 FIEDLER,BEVERLY 8521 TIGUA LN BEVERLY A FIEDLER CHANHASSEN MN 55317 9615 257400030 HAUTMAN,JOSEPH 8551 TIGUA LN JOSEPH & GAYLE HAUTMAN CHANHASSEN MN 55317 9615 255530010 CHANHASSEN,CITY 0 CITY OF CHANHASSEN CHANHASSEN MN 55317 0147 250240110 JCHANHASSEN,CITY 0 CITY OF CHANHASSEN CHANHASSEN MN 55317 0147 257400021 PETERSON,ERIC L 8561 TIGUA LN ERIC L PETERSON CHANHASSEN MN 55317 9615 257400020 LYONS,PAUL C 8571 TIGUA LN PAUL C LYONS CHANHASSEN MN 55317 9615 250242600 KLINGELHUTZ DEV 8910 LAKE RILEY BLVD KLINGELHUTZ DEVELOPMENT CO CHASKA MN 55318 0089 255530060 NORTH BAY HOMEO 0 NORTH BAY HOMEOWNERS ASSN INC ROSEVILLE MN 55113 1128 250240100 LAKEVIEW HILLS 125 LAKEVIEW RD E LAKEVIEW HILLS LLC MINNETONKA MN 55343 9466 255530020 LAKEVIEW HILLS 0 LAKEVIEW HILLS LLC MINNETONKA MN 55343 9466 255530030 CHANHASSEN,CITY 0 CITY OF CHANHASSEN CHANHASSEN MN 55317 0147 250240200 LUDWIG,JOAN M 9005 LAKE RILEY BLVD JOAN M LUDWIG CHANHASSEN M 55317 8650 250240300 COOPER,LAURA MA 9015 LAKE RILEY BLVD LAURA MARIE COOPER CHANHASSEN M 55317 8650 250240500 GRANT,NORMAN C 9021 LAKE RILEY BLVD NORMAN C JR & KIMBERLY GRANT CHANHASSEN M 55317 8650 257470010 SMITH,DELBERT R 9051 LAKE RILEY BLVD DELBERT R & NANCY R SMITH CHANHASSEN MN 55317 8650 257470020 LEWIS,RAYMOND M 9071 LAKE RILEY BLVD RAYMOND M &JUDITH N LEWIS CHANHASSEN MN 55317 8650 257950020 BACKER,RONALD S 9101 LAKE RILEY BLVD RONALD S & JEANETTE K BACKER CHANHASSEN MN 55317 8652 257950030 TONJES,JAMES L 9111 LAKE RILEY BLVD JAMES L TONJES MINNEAPOLIS MN 55440 1113 257950040 HUNGELMANN,J P 9117 LAKE RILEY BLVD J P JR & JUDITH M HUNGELMANN CHANHASSEN MN 55317 8652 257950050 GOULETT,JOHN B 9119 LAKE RILEY BLVD JOHN B JR & MARLYN G GOULETT CHANHASSEN MN 155317 18652 257950060 OLIN,RICHARD D 9125 LAKE RILEY BLVD RICHARD D & FRIEDA A OLIN CHANHASSEN MN 55317 8652 257950070 DUHAIME,DAVID A 9131 LAKE RILEY BLVD DAVID A DUHAIME CHANHASSEN MN 55317 8652 250240700 SITTER,DONALD W 9249 LAKE RILEY BLVD DONALD W & KATHRYN N SITTER CHANHASSEN MN 55317 8654 257950080 SIMMONS,PATRICK 9203 LAKE RILEY BLVD PATRICK E & ANGELA D SIMMONS CHANHASSEN MN 55317 8654 250240900 BERSHOW,BARRY A 9271 KIOWA TRL BARRY A & HARRIET F BERSHOW CHANHASSEN MN 55317 8615 250240600 PORTER,TODD W & 9261 KIOWA TRL TODD W & JILL PORTER CHANHASSEN MN 55317 8615 250241000 IPEMRICK,PETERJ 9251 KIOWA TRL PETER PEMRICK JR & CHANHASSEN MN 55317 8615 257950100 SAPP,LELAND G & 9209 LAKE RILEY BLVD LELAND G SAPP & DIANE K TAYLOR CHANHASSEN MN 55317 8654 257950110 KRIER,CURTIS G 9211 LAKE RILEY BLVD CURTIS G KRIER CHANHASSEN MN 55317 8654 257950240 MAJERKO ALAN R 9247 LAKE RILEY BLVD ALAN R MAJERKO CHANHASSEN MN 55317 8659 257950120 HASTINGS,GREGOR 9217 LAKE RILEY BLVD GREGORY L & KELLY R HASTINGS CHANHASSEN MN 55317 8654 257950230 GRANLUND,CRAIG 9245 LAKE RILEY BLVD CRAIG GRANLUND CHANHASSEN MN 55317 8654 257950220 SMITH,JOY A & H 9243 LAKE RILEY BLVD JOY A & HILBERT F SMITH CHANHASSEN MN 55317 8654 257950210 SUNNYSLOPE HOME 0 SUNNYSLOPE HOMEOWNERS ASSN CHANHASSEN MN 55317 8604 257950200 OLSON,PAUL KENT 9239 LAKE RILEY BLVD PAUL KENT OLSON CHANHASSEN MN 55317 8654 257950130 BAKER,DENNIS R 9219 LAKE RILEY BLVD DENNIS R & ANN BAKER CHANHASSEN MN 55317 8654 257950140 SUTER,THOMAS J 9221 LAKE RILEY BLVD THOMAS J & SUE A SUTER EDEN PRAIRIE MN 55347 12851 257950190 JOHNSON,DEAN SC 9235 LAKE RILEY BLVD DEAN SCOTT JOHNSON CHANHASSEN MN 55317 8654 257950180 POTTHOFF,FREDER 9231 LAKE RILEY BLVD FREDERICK POTTHOFF III & CHANHASSEN MN 55317 8654 257950160 HAMILTON,JAMES 9225 LAKE RILEY BLVD JAMES G & LAURA B HAMILTON CHANHASSEN MN 55317 8654 257950170 YTZEN,RONALD W 9227 LAKE RILEY BLVD RONALD W & ELIZABETH C YTZEN CHANHASSEN MN 55317 8654 250900020 HALVERSON,CRAIG 9283 KIOWA TRL CRAIG W & KATHRYN HALVERSON CHANHASSEN MN 55317 8615 250900030 HALVERSON,CRAIG 9285 KIOWA TRL CRAIG W & KATHRYN HALVERSON CHANHASSEN MN 55317 8615 250900040 WILLIAMS,STEVEN 9291 KIOWA TRL STEVEN A & RENEE A WILLIAMS CHANHASSEN MN 55317 8615 250900050 BABCOCK,SUSAN M 9351 KIOWA TRL SUSAN MARIE BABCOCK CHANHASSEN MN 55317 8617 250900060 LILLIE,PETER C 9355 KIOWA TRL PETER C & GEORGE-ANN LILLIE CHANHASSEN MN 55317 8617 250900070 DOMKE,EDWIN MIC 19361 KIOWATRL EDWIN MICHAEL DOMKE CHANHASSEN MN 55317 8617 250900080 BELL,JOHN W & B 19371 KIOWA TRL JOHN W & BEVERLY J BELL CHANHASSEN MN 55317 8617 1 250900090 MOKSNES,MARK A 9381 KIOWA TRL MARK A & PAMELA K MOKSNES CHANHASSEN MN 55317 8617 250900100 KING,JOYCE E 9391 KIOWA TRL JOYCE E KING CHANHASSEN MN 55317 8617 250251400 NELSON,PRINCE R 9401 KIOWA TRL PRINCE R NELSON CHANHASSEN MN 55317 8201 250250100 O'NEILL,PAMELA 9431 HWY 101 PAMELA A O'NEILL CHANHASSEN MN 55317 8681 254080140 CHADWICK,RICHAR 9530 FOXFORD RD RICHARD J CHADWICK CHANHASSEN MN 55317 8681 254080130 MILLS,DENNIS M 9510 FOXFORD RD DENNIS M & NANCY M MILLS CHANHASSEN MN 55317 8681 254080360 LAKE RILEY WOOD 0 LAKE RILEY WOODS HOMEOWNERS CHANHASSEN MN 55317 8688 254080120 PETER,PETE P & 9490 FOXFORD RD PETE P & JOYCE L PETER CHANHASSEN MN 55317 8686 254080110 BELLOWS,BRIAN E 9470 FOXFORD RD BRIAN E & TRACY S BELLOWS CHANHASSEN MN 55317 WM 254080100 HENAK,WILLIAM S 280 EASTWOOD CT WILLIAM S HENAK & CHANHASSEN MN 55317 8683 254080090 HENAK,WILLIAM S 0 WILLIAM S HENAK & CHANHASSEN MN 55317 8683 254080080 CAZIER,LINDA 240 EASTWOOD CT LINDA CAZIER CHANHASSEN MN 55317 8683 254090010 KENNEDY,DONALD 108 PIONEER TRL DONALD H III & DIANE M KENNEDY CHANHASSEN MN 55317 8659 254090030 BERKLAND,WENDY 10 PIONEER TRL ELDON L BERKLAND & CHANHASSEN MN 55317 8627 254090020 GRAY,WILLIAM T 50 PIONEER TRL WILLIAM T & CAROL ANN GRAY CHANHASSEN MN 55317 8627 257420090 REILLY,MICHAEL 9701 MEADOWLARK LN MICHAEL J REILLY & CHANHASSEN IMN 55317 8626 257420050 BURKE,STEVEN F 9591 MEADOWLARK LN STEVEN F & KATHLEEN M BURKE CHANHASSEN IMN 155317 8693 257420080 MONK,MICHAEL T 9671 MEADOWLARK LN MICHAEL T & TERESA A MONK CHANHASSEN MN 55317 8695 257420060 ERHART,TIMOTHY 9611 MEADOWLARK LN TIMOTHY A & DAWNE M ERHART CHANHASSEN MN 55317 8695 257420070 VOGEL,GAYLE M & 105 PIONEER TRL GAYLE M & RICHARD P VOGEL CHANHASSEN MN 1155117 8660 PIN IHOUSENUM ISTREETNIM IMUNINAME IZIPCODE JOWNERNAME Affected Parcels - Hennepin County 1811622230003 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 CITY OF EDEN PRAIRIE 1811622320001 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 STATE OF MINNESOTA 1811622330001 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 STATE OF MINNESOTA 1811622340002 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 STATE OF MN 1911622210038 18640 ST MELLION PL EDEN PRAIRIE 55347 T A COLLETT & J J COLLETT 1911622220003 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 BEARPATH GOLF/CNTRY CLUB L P 1911622240043 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 _ BEARPATH GOLF/CNTRY CLUB L P 1911622240044 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 BEARPATH GOLF/CNTRY CLUB L P 1911622240045 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 BEARPATH GOLF/COUNTRY CLB LP 1911622310002 9018 RILEY LAKE RD EDEN PRAIRIE 55347 ELAINE M JACQUES 1911622310004 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 ELAINE M JACQUES 1911622310005 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 CITY OF EDEN PRAIRIE 1911622310006 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 CITY OF EDEN PRAIRIE 1911622320001 9014 RILEY LAKE RD EDEN PRAIRIE 55347 W S & S L ANDERSON 1911622320004 9008 RILEY LAKE RD EDEN PRAIRIE 55347 J M & B A KIRTLAND TRUSTEES 1911622320006 9000 RILEY LAKE RD EDEN PRAIRIE 55347 J BUSHEY & M CORYA 1911622320007 9002 RILEY LAKE RD EDEN PRAIRIE 55347 R E LUND & V A LUND _ 1911622320008 9004 RILEY LAKE RD EDEN PRAIRIE 55347 PAUL J TAUNTON 1911622320009 9012 RILEY LAKE RD EDEN PRAIRIE 55347 DEAN M SCHULKE 1911622320010 9010 RILEY LAKE RD EDEN PRAIRIE 55347 J M & B A KIRTLAND TRUSTEES 1911622340002 93001 RILEY LAKE RD EDEN PRAIRIE 55347 CITY OF EDEN PRAIRIE 1911622340003 9301 RILEY LAKE RD EDEN PRAIRIE 55347 CITY OF EDEN PRAIRIE 1911622340004 9281 RILEY LAKE RD EDEN PRAIRIE 55347 ERNIE SHULDHIESS 1911622340005 9291 RILEY LAKE RD EDEN PRAIRIE 55347 K L SHULDHIESS ETAL 1911622340007 61 ADDRESS UNASSIGNED EDEN PRAIRIE 0 CITY OF EDEN PRAIRIE _ 1911622420008 9100 RILEY LAKE RD EDEN PRAIRIE 55347 CITY OF EDEN PRAIRIE 3011622210004 9450 LAKELAND TER EDEN PRAIRIE 55347 L G SCHOENECKER ET AL TRSTES 3011622220002 9536 LAKELAND TER EDEN PRAIRIE 55347 G D HALVORSONB A HALVORSON 3011622220003 9480 LAKELAND TER EDEN PRAIRIE 55347 DONALD C SARLES ETAL 3011622220004 9470 LAKELAND TER EDEN PRAIRIE 55347 D J & A L FLORENZANO 3011622220005 9510 LAKELAND CIR EDEN PRAIRIE 55347 GEORGE R ADZICK 3011622220006 9520 LAKELAND CIR EDEN PRAIRIE 55347 T P MANNING & S A MANNING 3011622220008 9509 HIGHVIEW DR EDEN PRAIRIE 55347 P & J BRIDGES 3011622220009 9505 HIGHVIEW DR EDEN PRAIRIE 55347 JOHN P FORSTER ETAL 3011622220010 9503 HIGHVIEW DR EDEN PRAIRIE 55347 R A & M J ADOMAITIS 3011622220011 1 95011 HIGHVIEW DR JEDEN PRAIRIE 55347 J M WALSTAD & S M WALSTAD Riley Purgatory Bluff Creek Watershed District Web Site: hUp//www.rileypurgatorybluffcreek.org December 3, 2003 Ms. Lori Haak Water Resources Coordinator City of Chanhassen 7700 Market Boulevard Legal Advisor: Krebsbach & Haik 701 4th Avenue South, Suite 500 Minneapolis, MN 55415 612 333-7400 Fax: 612 333-6959 Engineering Advisor: Barr Engineering 4700 West 77th Street Minneapolis, MN 55435 952 832-2600 Fax: 952 832-2601 Ms. Leslie Stovring Environmental Coordinator City of Eden Prairie 8080 Mitchell Road V ,, DEC 0 03 2003 PO Box 147 Eden Prairie MN 55344-4485 CITY OF CHANHASSEN Chanhassen, MN 55317 Re: Review Comments on the Draft Engineer's Report: Lake Riley Improvement Project Dear Ms. Haak and Ms. Stovring: Thank you for providing review comments on the Draft Engineer's Report: Lake Riley Improvement Project (Draft Engineer's Report). Based on your comments, the report is being revised and will be reissued during the first quarter of next year, after core sampling of Rice Marsh Lake sediments has been completed. The sediment core sampling will be conducted this winter, through the ice, to determine what an appropriate alum dose rate would be. Revisions to the Draft Report will include the following, listed below by topic: 1. Additional Runoff Detention Pond Construction or Upgrade The Draft Engineer's Report discussed only runoff detention ponds considered in the Lake Riley Use Attainability Analysis report. In response to the project petitions from both cities, the detention ponds recommended in the Lake Susan/Rice Marsh Lake Use Attainability Analysis report are now being added to the project. They include the following nine ponds at the indicated approximate costs. Addition of these ponds to the project will increase total project cost by $764,353, to $1.44 million. Table 1 Preliminary Cost Estimate —Upgrade Existing Pond RM2.1 to NURP Standards Item Unit Estimated Quantity Unit Price Extension Mobilization 5% L.S. 1 $695 $695 Basin Excavation C.Y. 1291 $10 $12,907 Site Restoration Ac. 0.5 $2,000 $1,000 Subtotal $14,602 En ineerin & Desi n 15% $2,190 Contingencies 10% $1,460 Total $18.253 Note: Does not appear to be a MDNR protected water based on the PWI Maps. Board of Managers Howard Peterson Perry Forster Conrad Fiskness Philip Wright Susan Scribner Ms. Lori Haak Ms. Leslie S[ovring December 3, 2003 Paee 2 Table 2 Preliminary Cost Estimate —Upgrade Existing Pond RM2.2 to NURP Standards Item Unit Estimated Quantity Unit Price Extension Mobilization 5% L.S. 1 $615 $615 Basin Excavation C.Y. 1129 $10 $11,293 Site Restoration Ac. 0.5 $2,000 $1,000 Subtotal $12,908 Engineering & Design 15% $1,936 Contin encies 10% $1,291 Total $16,135 Note: Does not appear to be a MDNR protected water based on the PW I Maps. Table 3 Preliminary Cost Estimate —Upgrade Existing Pond RM2.4 to NURP Standards Item Unit Estimated Quantity Unit Price Extension Mobilization 5% L.S. 1 $921 $921 Basin Excavation C.Y. 1742 $10 $17,424 Site Restoration Ac. 0.5 $2,000 $1,000 Subtotal $19,345 Engineering & Design 15% $2,902 Contingencies 10% $1,935 Total $24.182 Note: Does not appear to be a MDNR protected water based on the PW I Maps. Table 4 Preliminary Cost Estimate —Upgrade Existing Pond RM2.6 to NURP Standards Item Unit Estimated Quantity Unit Price Extension Mobilization 5% L.S. 1 $907 $907 Basin Excavation C.Y. 1613 $10 $16,133 Site Restoration Ac. 1 $2,000 $2,000 Subtotal $19,040 Engineering & Design 15% $2,856 Contingencies 10% $1,904 Total $23,800 Note: Does not appear to be a MDNR protected water based on the PW I Maps. ::ODMA\PCDOCS\DOCS\242589\ 1 Ms. Lori Haak Ms. Leslie Stovring December 3, 2003 Table 5 Preliminary Cost Estimate —Upgrade Existing Pond RM6.5 to NURP Standards Item Unit Estimated Quantity Unit Price Extension Mobilization 5% L.S. 1 $9,135 $9,135 Basin Excavation C.Y. 18069 $10 $180,693 Site Restoration Ac. 1 $2,000 $2,000 Subtotal $191,828 Engineering & Design 15% $28,774 Contingencies 10% $19,183 Total $239.785 Note: Does not appear to be a MDNR protected water based on the PW I Maps. Table 6 Preliminary Cost Estimate —Add Pond RM1.1 Designed to NURP Standards Item Unit Estimated Quantity Unit Price Extension Mobilization 5% L.S. 1 $11,054 $11,054 Inflow Diversion Structure L.S. 1 $5,000 $5,000 Clearing & Grubbing Ac. 1.5 $1,000 $1,500 Basin Excavation C.Y. 14359 $10 $143,587 Outlet Structure L.S. 1 $15,000 $15,000 Wetland Mitigation Ac. 1 $50,000 $50,000 Site Restoration Ac. 3 $2,000 $6,000 Subtotal $232,141 Engineering & Design 15% $34,821 Contingencies 10% $23,214 Easements` Ac. 0 $0 $0 Total $290,176 City currently owns the land at the proposed location. Note: Does not appear to be a MDNR protected water based on the PWI Maps, However, construction of this basin may impact the fringe wetland around Rice Marsh Lake and therefore require wetland mitigation. ::ODM A\PCDOCS\DOCS\242589\ I Ms. Lori Haak Ms. Leslie Stovring December 3, 2003 Table 7 Preliminary Cost Estimate —Add Pond RM2.5 Designed to NURP Standards Item Unit Estimated Quantity Unit Price Extension Mobilization 5% L.S. 1 $2,738 $2,738 Inflow Diversion Structure L.S. 1 $5,000 $5,000 Clearing & Grubbing Ac. 0.5 $1,000 $500 Basin Excavation C.Y. 3227 $10 $32,267 Outlet Structure L.S. 1 $15,000 $15,000 Site Restoration Ac. 1 $2,000 $2,000 Subtotal $57,505 Engineering & Design 15% $8,626 Contingencies 10% $5,751 Easements' Ac. 0 $0 $0 Total $71,881 City currently owns the land at the proposed location. Note: Does not appear to be a MDNR protected water based on the PWI Maps. Table 8 Preliminary Cost Estimate —Add Pond RM2.8 Designed to NURP Standards Item Unit Estimated Quantity Unit Price Extension Mobilization 5% L.S. 1 $3,053 $3,053 Inflow Diversion Structure L.S. 0 $5,000 $0 Clearing & Grubbing Ac. 0.5 $1,000 $500 Basin Excavation C.Y. 4356 $10 $43,560 Outlet Structure L.S. 1 $15,000 $15,000 Site Restoration Ac. 1 $2,000 $2,000 Subtotal $64,113 Engineering & Design 15% $9,617 Contingencies 10% $6,411 Easements` Ac. 0 $0 $0 Total $80,141 ' City currently owns the land at the proposed location. Note: Does not appear to be a MDNR protected water based on the PW I Maps. ::ODMA\PCDOCS\DOCS\242589\ t Ms. Lori Haak Ms. Leslie Stovring December 3, 2003 Table 9 Preliminary Cost Estimate —Add Pond RM6.9 Designed to NURP Standards Item Unit Estimated Quantity Unit Price Extension Mobilization 5% L.S. 1 $2,738 $2,738 Inflow Diversion Structure L.S. 1 $5,000 $5,000 Clearing & Grubbing Ac. 0.5 $1,000 $500 Basin Excavation C.Y. 3227 $10 $32,267 Outlet Structure L.S. 1 $15,000 $15,000 Site Restoration Ac. 1 $2,000 $2,000 Subtotal $57,505 Engineering & Design 15% $8,626 Contingencies 10% $5,751 Easements" Ac. 1 $111,967 $111,967 Total $183,848 " Easement Cost based on Carver County assessed land value. The City of Chanhassen may already have an easement of the existing drainage way. If so, the total project cost is estimated to be about $72000. Note: Does not appear to be a MDNR protected water based on the PW I Maps. Additional runoff detention ponds associated with construction of Trunk Highway 312 were included in the Draft Engineer's Report despite not being requested in petitions from the Cities because they are regarded as necessary actions required to protect Lake Riley water quality. Construction of these ponds was recommended previously in both the Lake Riley Use Attainability Analysis report and in the Riley -Purgatory -Bluff Creek Watershed District Water Management Plan. Construction of the T.H. 312 runoff detention ponds does not obviate the need for any other ponds in the upstream watershed. 2. Rough Fish Barriers Upon recommendation of Mr. Darryl Ellison (Mn/DNR Fisheries Manager), rough barriers upstream and downstream of Rice Marsh Lake were added to the project. Exclusion of carp from Rice Marsh Lake, where they spawn each year, is expected to improve water quality conditions in Lakes Riley and Susan, as well as in Rice Marsh Lake, by reducing sediment phosphorus recycle caused by the benthivorous feeding habits of carp. It will also reduce resuspension of the alum applied to Rice Marsh Lake sediments, thereby lengthening the effective life of an alum treatment. Additionally, Mn/DNR favors a winter draw -down of Rice Marsh Lake to induce winterkill of the carp residing the Rice Marsh Lake, after rough fish barriers have been constructed. Mr. Ellison also indicated that a "winter -kill" within Lake Susan would be encouraged to control the rough fish population within the lake system. ::ODMA\PCDOCS\DOCS\242589\1 Ms. Lori Haak Ms. Leslie Slowing December 3, 2003 Pace 6 3. 2003 Water Quality Conditions and the need for a Rice Marsh Lake Alum Treatment The observed 2003 Rice Marsh Lake water quality data submitted by the City of Chanhassen along with their review comments, shows better conditions than have ever been recorded previously. Total phosphorus concentrations in July and August 2003 ranged between 15 and 29 µg/L. This compares disparately with summer average total phosphorus concentrations greater than 150 µg/L during the most recent years of Riley -Purgatory -Bluff Creek Watershed District monitoring (1997, most recent). While the 2003 Chanhassen water quality data appear anomalous, they are probably correct, and can rationally be explained. The summer of 2003 was extremely dry and little or no outflow from Rice Marsh Lake occurred. Abundant growths of the floating aquatic macrophyte Coontail (Ceratophyllum demersum) developed rapidly and soon blanketed the entire open water area of the lake. Coontail is one of only a few aquatic vascular plants that can extract phosphorous from the water columns instead of from the sediment through its roots. Coontail is also known to exert an allelopathic inhibiting effect on other plants, including phytoplanktonic algae. Allelopathy refers to the chemical inhibition of one species by another, whereby an inhibitory chemical (an alkaloid, in this instance) excreted into the environment where it adversely affects the development and growth of neighboring plants. I suspect that during the summer of 2003, Rice Marsh Lake sediments continued to release sediment phosphorus into the overlying water column, but that Coontail, rather than algae, incorporated it into their biomass because of allelopathy. The absence of an outflow from the lake probably exacerbated this situation by allowing the concentration of allelopathic chemicals to buildup in the water column during the summer months. Since the floating aquatic macrophytes are not included in the water column total phosphorus testing, the observed concentrations were consequently low. Further, I would expect the lake to revert to a more characteristic pattern of elevated summer total phosphorous and chlorophyll a (i.e., phytoplanktonic algae) concentrations during years of normal rainfall and flow conditions. Our planned analyses of lake sediment cores this winter should shed further light on the apparently anomalous 2003 water quality data since sediment phosphorus recycle potential is directly related to the sediment's releasable phosphorus concentrations, which we will be measuring directly. These sediment analyses will also determine, in part, whether increasing the stage of Rice Marsh Lake could potentially improve the lake's ability to serve as a runoff treatment basin. Currently, we do not believe that to be a feasible alternative to a sediment alum treatment since the majority of phosphorus leaving Rice Marsh Lake has repeatedly been shown to originate from seasonally anoxic sediments, not watershed runoff. ::0DMA\PCD0CS\D0CS\242589\ I Ms. Lori Haak Ms. Leslie Stovring December 3, 2003 Paee 7 Thank you again for your review comments on the Draft Engineer's Report. Please expect to receive a revised version early next year, probably in January. In the interim, please contact Bob Obermeyer or me if you have further questions or comments. Sincerely, BARR ENGINEERING CO. Henry M. (Hal) Runke, Ph.D. Limnologist HMR/ymh c: Riley -Purgatory -Bluff Creek Watershed District Managers Paul Haik ::0DMA\PCD0CS\D0CS\242589\1 September 29, 2003 Cl �rl l�p OF Mr. Bob Obermeyer CHANgASSEN Riley -Purgatory -Bluff Creek Watershed District 4700 W. 77th Street 7700 Market Boulevard Minneapolis, MN 55435 PO Box 147 Chanhassen, MN 55317 Dear Mr. Obermeyer: Administration Phone:952.227.1100 The City of Chanhassen is in receipt of the "Engineer's Report: Lake Riley Fax:952.227.1110 Water Quality Improvement Project" dated July 30, 2003. Below please find Building Inspections the City's comments regarding this report. Phone: 952.227.1180 Fax 952227.1190 The water quality data for Rice Marsh Lake obtained in 2003 by the Engineering City's consultant (attached) demonstrates water quality far better than Phone:952.227.1160 that included in the 1999 Use Attainability Analysis. This being the Fax:952.227.1170 case, it appears that alum treatment may be unnecessary in Rice Marsh Finance Lake at this time. Phone 952.227.1140 Fax:952.227.1110 • The only ponds proposed within the Feasibility Study are those Park A Recreation necessary in conjunction with the construction of Trunk Highway 212. Phone:952.227.1120 These ponds were not included in petitions submitted by either City Fax:952.227.1110 because it was assumed that they would be designed and constructed as Recreation center a part of MnDOT's Trunk Highway 212 project. 2310 Coulter Boulevard Pnone. 952.227.1400 Fax 952.227.1404 . The proposed water quality pond upgrades and construction requested in Planning a the City of Chanhassen's petition are not included in the Feasibility Natural Resources Study (Upgrade RM 2.1, 2.2, 2.4, 2.6 and 6.5; Construct RM 1.1, 2.5, Phone: 952.227.1130 2.8 and 6.9). Fax: 952.227.1110 Public works • The water quality pond improvements requested in the City of Eden 1591 Park Road Prairie's petition and resolution are not included in the Feasibility Study. Phone: 952227.1300 Fax 952.227.1310 • The rough fish barriers proposed in the Feasibility Study were not Senior Center identified in either Use Attainability Analysis and the anticipated Phone:952.227.1125 benefits of installing such barriers have not been identified. Fax:952.227.1110 Web site On page 34 of the Lake Riley Use Attainability Analysis, it states that "the www.ci.chanhassen.mn.us amount of phosphorus added to the lake from Riley Creek... represents between 51 to 61 percent of the lake's annual load. Most of the creek's phosphorus load is from the lake's indirect watershed." For this reason, it appears that the greatest water quality benefits to Lake Riley (and the water resources upstream) will be realized when storm water ponding is provided in the Riley Creek watershed. The City of Chanhassen • A growing community with clean lakes, quality schools, a channing downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play. The City of Chanhassen is concerned with the recommendations included in the draft Feasibility Study because the recommendations include reactive, short-term solutions rather than proactive, long-term investments in water quality. To that end, the City requests the District to revise the Feasibility Study to incorporate more permanent water quality improvements (including storm water ponding) instead of relying primarily on alum treatment to improve water quality. If you have any questions regarding these comments, please contact me at 952.227.1135 Sincerely, / CITpYOF C— SSEN t/ 117 VV Lori Haak Water Resources Coordinator Chanhassen Lakes data 2003. Date Ann Lucy Rice Marsh Susan (2003) Secchi (1t) TP (ppb) Chi a (PPb) Secchi (n) TP (ppb) Chia (ppb) Secchi (n) TP (ppb) Chia (ppb) Secchi (n) TP (ppb) Chia (ppb) 5.15 11.1 25 4 12.3 53 1 -- - - 6.0 30 12 5.29 9.7 29 4 10.8 25 2 7.6 61 4 7.1 32 11 6.12 11.9 17 5 8.2 25 14 7.0+ 68 5 5.2 26 8 6.27 11.1 11 3 5.9 22 2 7.5+ 33 2 6.6 35 <1 7.16 11.1 12 3 4.9 32 19 7.0+ 24 <1 5.4 49 26 7.30 13.8 9 3 7.0 28 8 8.0+ 29 2 10.0 30 4 8.14 12.5 9 2 3.8 19 15 7.5+ 15 2 5.6 29 13 8.27 12.2 14 3 4.4 33 12 6.0+ 24 2 4.3 73 48 Sept Sept Avg 11.7 16 3 7.2 30 9.1 7.3 39 2.8 6.3 1 38 15.4 Avg: average is through August Chanhassen Lakes data 2003. Date Ann Lucy Rice Marsh Susan (2003) Secchl (n) TP (ppb) Chl s (ppb) Secchl (n) TP (ppb) Chi a (ppb) Secchi (n) TP (ppb) Chia (ppb) Secchl (n) TP (ppb) Chia (ppb) 5.15 11.1 25 4 12.3 53 1 - -- - 6.0 30 12 5.29 9.7 29 4 10.8 25 2 7.6 61 4 7.1 32 11 6.12 11.9 17 5 8.2 25 14 7.0+ 68 5 5.2 26 8 6.27 11.1 11 3 5.9 22 2 7.5+ 35 <1 7.16 11.1 12 3 4.9 32 19 7.0+ 5.4 49 26 7.30 13.8 9 3 7.0 28 8 8.0+ 10.0 30 4 8.14 12.5 9 2 3.8 19 15 7.5+ W3326.6 5.6 29 13 8.27 12.2 14 3 4.4 33 12 6.0+ 4.3 73 48 Sept Sept Avg 11.7 16 3 7.2 30 9.1 7.3 39 2.8 6.3 38 15.4 Avg: average is through August Secchi Disc Trans arenc Date (2003) Ann Lucy Rice Marsh Susan 5.15 11.1 12.3 -- 6.0 5.29 9.7 10.8 7.6 7.1 6.12 11.9 8.2 7.0+ 5.2 6.27 11.1 5.9 7.5+ 6.6 7.16 11.1 4.9 7.0+ 5.4 7.30 13.8 7.0 8.0+ 10.0 8.14 12.5 3.8 7.5+ 5.6 8.27 12.2 4.4 6.0+ 4.3 Sept Sept Avg 11.7 7.2 7.3 6.3 Avg: average is through August Total Phosphorus Date (2003) Ann Lucy Rice Marsh Susan 5.15 25 53 -- 30 5.29 29 25 61 32 6.12 17 25 68 26 6.27 11 22 33 35 7.16 12 32 24 49 7.30 9 28 29 30 8.14 9 19 15 29 8.27 14 33 24 73 Sept Sept Avg 16 30 39 38 Avg: average is through August Chlorophyll a concentration. Date (2003) Ann Lucy Rice Marsh Susan 5.15 4 1 -- 12 5.29 4 2 4 11 6.12 5 14 5 8 6.27 3 2 2 <1 7.16 3 19 <1 26 7.30 3 8 2 4 8.14 2 15 2 13 8.27 3 12 2 48 Sept Sept Avg 3 9.1 2.8 15.4 Avg: average is through August `N �t5�1 ✓t i G q q 8 r T nbO o,l !�ici o e4 4-1i og pimd:s U7 DIu io S eeii -k a on n®✓\ tlkr5li dl P� i aAe S A-LrAIL , (6 a� Ic y- ,,ems I pp !o L c M7V4 } 7;J5% -&v, �-Ip-ye-4x q, I I, -t, `P79. Ike a in WL Leo OZ ;r wr&4 6�v ekju Barr Engineering Company 4700 West 77th Street •Minneapolis, MN 55435-4803 Phone:952-832-2600 • Fax:952-832-2601 • www.barr.com BARR Minneapolis, MN • Hibbing, MN • Duluth, MN • Ann Arbor, MI • Jefferson City, MO August 7, 2003 RECEIVED AUG 0 8 2003 Ms. Lori Haak City of Chanhassen 7700 Market Boulevard PO Box 147 Chanhassen, MN 55317 Re: Engineer's Feasibility Report: Lake Riley Water Quality Improvements Dear Ms. Haak: CITY OF CHANHASSEN Enclosed for your review and comment is a copy of the draft Engineer's Feasibility Report for the Lake Riley Water Quality Improvement Project. Your prompt review and comment will be greatly appreciated. The District would like to receive comments within the next two weeks so that the report can be finalized and sent to the Board of Water and Soil Resources and Minnesota Department of Natural Resources for their review ands comment. The Managers would like to hold the Public Hearing for the project in the early fall, late September or early October, so that the project can be authorized, construction documents prepared, and permits obtained so that the alum treatment can be undertaken in the spring, 2004. The project scope and costs presented in the report are water resource related therefore in accordance with the District's Financing Policy the project will be totally funded by the District. If you have any questions, please call me at 952-832-2857. Sincerely, Robert C. Obermeyer C: Board of Managers Paul Haik CITY OF CHANHASSEN CARVER AND HENNEPIN COUNTIES, MINNESOTA DATE: January 13, 2003 RESOLUTION NO: 2003-02 MOTION BY: Peterson SECONDED BY: Avotte A RESOLUTION RELATING TO THE RILEY AND RICE MARSH LAKE WATER QUALITY IMPROVEMENT PROJECTS WHEREAS, Riley Lake and its tributary lake, Rice Marsh Lake, are important features within the City of Chanhassen; and WHEREAS, the City Council is committed to water quality improvement within Riley Lake; and WHEREAS, there is a documented relationship between deteriorating water quality within Riley Lake and the current storm water ponding system; and WHEREAS, the City of Chanhassen has determined that improvements to the storm water treatment system and fishery habitat are required to fully realize the recreational potential of the lake. NOW, THEREFORE, BE IT RESOLVED that the City Council desires to complete those items recommended within the Riley and Rice Marsh Lake Use Attainability Analyses to improve the quality of storm water runoff entering Riley Lake and hereby approves the attached petition to the Riley -Purgatory -Bluff Creek Watershed District to: Upgrade of five (5) existing storm water ponds that do not meet NURP standards. Construction of four (4) storm water ponds in areas where storm water is not treated prior to discharge. Treatment of each lake with an alum product to remove phosphorus from the water column. BE IT FURTHER RESOLVED that the City Council does request that the Riley - Purgatory -Bluff Creek Watershed District participate in funding these activities with a cost share as defined in the attached petition. Passed and adopted by the Chanhassen City Council this 13'" day of January 2003. ATTEST: ;� Todd Gerhardt, City Manager Thomas A. Furlong, Mayor YES NO ABSENT Furlong None None Labatt Lundquist Ayotte Peterson 0 CITY OF January 21, 2003 CgANHASSEN 7700 Market Boulevard Riley Purgatory Bluff Creek Watershed District PO Boa 147 ChanhassenMN , 55317 c/o Mr. Robert Oberme er y Barr Engineering Administration 4700 West 77`h Street Pax 952227127 1100 Fax 95.227.1110 Minneapolis, MN 55435 Building Inspections Re: Petition Regarding Lake Riley and Rice Marsh Lake Basic Water 'none. 952 227 1180 Management Projects Fax 952.227.1190 Engineering Dear District Managers and Mr. Obermeyer: '-:qe-. 952 227.1160 ;if 9522271170 Enclosed please find the fully executed petition for the above projects. Please Finance note that the cost to the City may not exceed $100,000 unless prior written :-i-: _52227.1140 approval is obtained from the City. F; 9522271110 Park a Recreation If you have questions or require additional information, feel free to contact me 952.227,1120 at 952.227.1135. I look forward to working with you on these projects. fax: 952 227.1110 Recreation Center Sincerely, 2310 coulter Boulevard Pima: 952.2271400 �ax..952.2271404 CITY OFF/}CCHANHASSEN Planning& Natural Resources / �52227 1130 ,rz21110 Lori Haak Public Works Water Resources Coordinator !S9l Paiv Road P-,,ne 952.2271300 Far. 952.2271310 Senior Center P^aae_ 952 227 1125 Fax 952.2271110 Web Site wr.+t:.chanhassen.mn.us G:\EiYG\Lori\Lk Mgmt\Riley\Petition Cover Letter.doc The City of Chanhassen • A growing corrunity with clean lakes. quality schools, a charming downtown. thriving businesses, winding (rails, and beautiful parks. A gnat place to live, work, and play. PETITION OF THE CITY OF CHANHASSEN TO RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT FOR THE LAKE RILEY AND RICE MARSH LAKE BASIC WATER MANAGEMENT PROJECTS I. AUTHORITY The City of Chanhassen petitions the Riley Purgatory Bluff Creek Watershed District, pursuant to the provisions of the Minnesota Statutes Sections 103D.201, 103D.605, 103D.705, and 103D.905, to undertake a basic water management project to protect and improve the water quality in Lake Riley and Rice Marsh Lake. II. PURPOSE The purpose of the project is to improve the water quality of Lake Riley by reducing internal and external sources of phosphorus in and to the lake that contribute to alga growth, resulting in decreased water quality, clarity and transparency. The Minnesota Board of Water and Soil Resources approved and the Riley Purgatory Bluff Creek Watershed District Board of Managers adopted a watershed management plan that assessed the condition of the lake through determination of its physical, chemical and biological qualities. The approved and adopted watershed management plan dated May 1996 is incorporated by reference. This project in the cities of Chanhassen and Eden Prairie will help remedy water quality impacts from: 1) municipal sewage treatment discharges that were made to Rice Marsh Lake through the early 1970s; 2) future construction of T.H. 312 between Lake Riley and Rice Marsh Lake; and 3) increased urbanization within the watershed. The Lake Riley and Rice Marsh Lake Use Attainability Analyses dated April 2002 and November 1999 respectively are incorporated by reference. III. GENERAL DESCRIPTION OF WORK PROPOSED AND PURPOSES The project proposes application of alum -plus -lime treatments and storm water management improvements to improve the water quality of the Lake Riley and Rice Marsh Lake. Application of the alum -plus -lime treatments will remediate prior municipal sewage treatment discharges, while the storm water management improvements will limit impacts from the highway construction and increased urbanization within the lake watershed. Through 1972, the City of Chanhassen discharged treated sewage wastewater into Rice Marsh Lake, resulting in high phosphorus levels within the sediments on the bottom of the lake. Although wastewater discharges were discontinued, the excess phosphorus from years of discharge continues to degrade the water quality of Lake Riley via flows from Riley Creek. Approximately 54% of the phosphorus entering Lake Riley flows from Rice Marsh Lake through Riley Creek. Phosphorus recycled from Rice Marsh Lake sediments into Riley Creek waters is a major contributor the phosphorus draining into Lake Riley. Proposed water quality improvements are expected to reduce the phosphorus recycled from lake sediments to the overlying lake water that would otherwise support alga growth or blooms. Within the City of Chanhassen, the project includes a proposal to treat Lake Riley and Rice Marsh Lake with an alum -plus -lime slurry. The proposal also calls for upgrading five (5) existing storm water management basins and the construction of four (4) new storm water basins. The new and upgraded basins will conform to the standards for the National Urban Runoff Ponding Basins and the requirements of the Minnesota Pollution Control Agency. Petition of the City of Chanhassen of Riley -Purgatory -Bluff Creek Watershed District Riley and Rice Marsh Lake Basic Water Management Projects January 2003 Page 2 of 3 Overall the project will increase the recreational use of swimming in Lake Riley by reducing the phosphorous loads to the lake thereby limiting the number of days the actual water quality exceeds the standard for recreational swimming. This is a Trophic State Index (TSI) of 53 (<40 mg/1), which is the guidance published by the Minnesota Pollution Control Agency to assess full support for primary contact recreation and aesthetics. The project intends continued monitoring and re-evaluation of the effect of constructing the proposed improvements for the purpose of determining whether additional controls are required. The proposed work is consistent with additional controls, if required to maintain the existing beneficial uses of Riley and Rice Marsh Lakes. IV. DESCRIPTION OF THE LANDS OVER WHICH THE PROPOSED IMPROVEMENTS ARE LOCATED The project will be located on property that is directly or indirectly tributary to Lake Riley, Rice Marsh Lake and Riley Creek that is located on the eastern and western boundaries of Chanhassen and Eden Prairie respectively. Within Chanhassen, the project will be located in the general area west of Dell Road and east of Trunk Highway 101 between Pioneer Trail and Trunk Highway 5 in the City of Chanhassen. The improvements are described in detail in the Riley and Rice Marsh Lake Use Attainability Analyses, which are incorporated by reference. V. GENERAL DESCRIPTION OF THE PART OF THE DISTRICT AFFECTED The affected lands are located in the cities of Chanhassen and Eden Prairie and include the riparian and tributary drainage areas to Lake Riley, Rice Marsh Lake and Riley Creek. Generally, the affected areas are south of Trunk Highway 5, east of Trunk Highway 101, and north of Pioneer Trail. The approximate centerline of the affected property is located along the municipal boundary between Chanhassen and Eden Prairie. Rice Marsh Lake is located in the cities of Chanhassen and Eden Prairie and has a 821-acre watershed containing woodlands, marsh, residences, parks and open spaces. The lake's direct watershed consists of 378 acres of low and moderate density housing, 348 acres of parks and open space, 50 acres of industrial and 26 acres of commercial land use. Riley Creek is the outlet from Rice Marsh Lake to Lake Riley. Riley Creek has a 10 square mile watershed, with mild topography in the upper and middle portions of the watershed and a steep, north -valley wall of the Minnesota River on the downstream end of the watershed. Riley Creek originates from lakes Lucy and Ann, and flows through Lake Susan, Rice Marsh Lake and Lake Riley before it begins its descent to the Minnesota River. This project will focus on the stretch of the creek between Rice Marsh Lake and Lake Riley. Finally, Lake Riley has a direct drainage area of 818 acres consisting of 449 acres of low - density residential, 286 acres of parks and open, 1 acre of commercial, and 82 acres of agricultural property. The lake has a maximum depth of approximately 50 feet, and a mean depth of approximately 23 feet. Water flows from Rice Marsh Lake to Lake Riley through Riley Creek. Lake Riley's total drainage area, including both direct and indirect drainage, is over 4,500 acres. VI. NEED AND NECESSITY FOR THE PROPOSED IMPROVEMENT Prior years of municipal wastewater discharges to Rice Marsh Lake has deposited excessive Petition of the City of Chanhassen ofRiley-Purgatory-Bluff Creek Watershed District Riley and Rice Marsh Lake Basic Water Management Projects January 2003 Page 3 of 3 amounts of phosphorus that untreated will impact Lake Riley for decades. The continued development in tributary areas and the scheduled construction of T.H. 312 between Lake Riley and Rice Marsh Lake necessitates water quantity management and treatment of water quality to protect and improve the scenic, recreational and wildlife of those specific lakes and the overall water quality of the District. VII. THE PROPOSED IMPROVEMENT WILL, BE CONDUCIVE TO THE PUBLIC HEALTH, CONVENIENCE AND WELFARE The City of Chanhassen petitions for the project because it will be conducive to the public health, convenience and welfare of the District and the City. Completion of the project, and associated recreational improvements, will preserve and enhance the public use and enjoyment of Riley and Rice Marsh Lakes and their adjacent parks, all of which are significant natural resources of the District and region. VIM FINANCING OF THE PROPOSED IMPROVEMENT The project is identified in the Riley Purgatory Bluff Creek Watershed District Water Management Plan and is a priority project of common benefit to the entire District. Minnesota Statutes Section 103D.905, Subdivision 3 provides for the project financing of the basic water management features of the project. The District will fund 100% of the costs of the project with the exception of any easement or property acquisition. The City will share (75%) in the cost of the cost of any such acquisitions. The cost to the City may not exceed $100,000 unless prior written approval is obtained from the City. IX. PROJECT ABANDONMENT The City of Chanhassen hereby states and acknowledges that it will pay all costs and expenses that may be incurred by the activities described in this petition in the event the project is dismissed, no construction contract is let, or the City withdraws its project petition. CITY OF CHANHASSEN Mayor of City of Chanhassen CITY OF CHANHASSEN City Manager 0 CITY OF CHMNSEN 7700 Market Boulevard PO Box 147 Chanhassen, MN 55317 Administration Phone:952.227.1100 Fax: 952.227.1110 Building Inspections Phone: 952.227.1180 Fax: 952.227.1190 Engineering Phone, 952.227.1160 Fax 952.227.1170 MEMORANDUM To: Todd Gerhardt, City Manager From: Lori Haak, Water Resources Coordinator Date: December 20, 2002 O Re: Resolution to Petition Riley -Purgatory -Bluff Creek Watershed District for Riley and Rice Marsh Lake Water Quality Improvement Projects REQUESTED ACTION Move to: Adopt Resolution to Petition the Riley -Purgatory -Bluff Creek Watershed District to Commit to Funding the Riley and Rice Marsh Lake Water Quality Improvement Projects. Finance Phone:952.227.1140 SUMMARY Fax: 952.2271110 Two Use Attainability Analyses (UAAs) were completed by the Riley-Purgatory- Part a Recreation Phone:952227.1120 Bluff Creek Watershed District (RPBCWD) and submitted to the Cities of Fax:952.227.1110 Chanhassen and Eden Prairie for review. This included: Recreation Center a Rice Marsh Lake / Lake Susan UAA (December 1999) - The intended use 2310 Coulter Boulevard for Rice Marsh Lake is to provide fish and wildlife habitat. The water Phone: 952221.1400 Fax 952.227.1404 quality improvements in these two lakes are part of a larger project to improve Lake Riley as they both drain towards Lake Riley. Planning a Natural Resources Lake Rile UAA (April - Lake Rile is a ke recreational resource ' y ( p y y Phone:952227.1130 for both Chanhassen and Eden Prairie. The intended uses are swimming Fax: 952.227.1110 and fishing. Public Works 1591 Park Road Staff recommends petitioning the RPBCWD to undertake the water quality Phone: 952.227,1300 improvements outlined in the UAAs for Rice Marsh Lake and Lake Riley. The Fax:952.227.1310 District will design and manage all projects and will pay 75 to 100% of the costs Senior center associated with the improvements. The City of Eden Prairie will also be Phone: 952.227.1125 submitting a petition to RPBCWD to participate in this project. Mr. Dave Fax 952.227.1110 Florenzano, President of the Lake Riley Improvement Association, has requested Web she that the Cities of Eden Prairie and Chanhassen forward this project to the District www.cl.chanhassewn.us for completion in 2003 (attached). BACKGROUND The purpose of the Lake Use Attainability Analyses (UAA) was to provide an The City of Chanhassen • A growing community with clean lakes, quality schools, a charming downtown, thriving businesses, winding trails, and beautiful parks. A great place to live, work, and play. Riley and Rice Marsh Lake Water Quality Improvement Projects January 2003 assessment of the water quality of Riley and Rice Marsh Lakes, analyze the problems and provide alternative remedial measures that would result in the attainment of water quality sufficient to fully support the intended uses of the lakes. Since Lake Riley receives water from Rice Marsh Lake via Riley Creek, water quality improvements in Rice Marsh Lake will benefit the water quality of Lake Riley. Watershed Conditions The direct watershed for Riley Lake consists primarily of residential (508 acres) and park/open space (706 acres). Remaining uses include agriculture (231 acres), highway (18 acres) and open water (300 acres). Future land use is anticipated to include a switch from agriculture and open space to more residential and highway as well as some commercial. The current storm water ponding system for the lake's current and future watershed is inadequate. Historical Water Quality The UAA included water quality analysis from 1971 through 1998 and indicated that Lake Riley's water quality has remained relatively stable, but generally poor, during that time. The water transparency declined from 2.2 meters in 1978 to 0.9 meters in 1998. Summer algae blooms during the UAA analysis were found to have impaired recreational usage of the lake and the lake was rated as eutrophic (poor). Current Water Quality The 1997 to 1998 Secchi disc and total phosphorous concentration data indicated that the lake was eutrophic (poor water quality) during the summer and hypereutrophic (very poor water quality) during the spring and fall. The data indicated that moderate to severe recreational use impairment (primarily swimming) occurs during the summer months. RECOMMENDED ACTIONS All indications are that significant improvement to the water quality in Riley Lake will take many years. The water quality in Riley Lake now is marginal for swimming. Staff recommends that the following items be budgeted from the storm water management fund for 2003 to assist in the proposed water quality improvements. Petitioning the RPBCWD to assist in completing the following actions is the recommended first step. 1. Upgrade Storm Water Management System — Five existing storm water ponds within Chanhassen do not meet NURP standards and need to be upgraded. Two pond upgrades will also take place within Eden Prairie. Four subwatersheds do not have adequate storm water ponding in place, so ponds need to be constructed. It is estimated that these improvements would result in a reduction in annual phosphorus loading to the lake by 50 to 95 pounds for future land uses. The estimated cost is $392,000 for the improvements in Chanhassen. Cost share of 25% by the City ($98,000) would be required if additional easements or property acquisition are required. The City has included in the petition a cost limit of $100,000 for Riley and Rice Marsh Lake Water Quality Improvement Projects January 2003 acquisition unless the District receives prior written approval from the City. 2. Alum -Lime Slurry Treatment of Rice Marsh Lake — Phosphorus from Rice Marsh Lake increases the amount of phosphorus in Riley Creek by a factor of three as it moves through the lake. Alum will be applied to the lake to precipitate phosphorus onto the lake bottom, thus removing in lake phosphorus and forming a layer over the sediments to prevent the release of phosphorus. The estimated cost of this would be a one time expenditure of $200,000 for 2003. The RPBCWD would cover 100% of this cost. 3. Alum -Lime Slurry Treatment of Lake Riley — Alum would be applied to remove excess phosphorus currently in the lake waters and sediments. This would reduce the amount of phosphorus within the lake immediately, allowing time for the other proposed measures to work on reducing phosphorus loading to maintain the higher water quality over time. The estimated cost of this would be a one time expenditure of $200,000 for 2003. The RPBCWD would cover 100% of this cost. If the RPBCWD approves the petition, an agreement with specific cost provisions will be developed for final approval by City Council at a later date. RECOMMENDATION Staff recommends the City Council adopt the following resolution: RESOLUTION RELATING TO THE RILEY AND RICE MARSH LAKE WATER QUALITY IMPROVEMENT PROJECTS WHEREAS, Riley Lake and its tributary lake, Rice Marsh Lake, are important features within the City of Chanhassen; and WHEREAS, the City Council is committed to water quality improvement within Riley Lake; and WHEREAS, there is a documented relationship between deteriorating water quality within Riley Lake and the current storm water ponding system; and WHEREAS, the City of Chanhassen has determined that improvements to the storm water treatment system and fishery habitat are required to fully realize the recreational potential of the lake. NOW, THEREFORE, BE IT RESOLVED, the City Council desires to complete those items recommended within the Riley and Rice Marsh Lake Use Attainability Analyses to improve the quality of storm water runoff entering Riley Lake and hereby approves the attached petition to the Riley -Purgatory -Bluff Creek Watershed District to: Upgrade of five (5) existing storm water ponds that do not meet NURP standards; Construction of four (4) storm water ponds in areas where storm water is not treated prior to discharge; and Riley and Rice Marsh Lake Water Quality Improvement Projects January 2003 • Treatment of each lake with an alum product to remove phosphorus from the water column. BE IT FURTHER RESOLVED, the City Council does request that the Riley -Purgatory - Bluff Creek Watershed District participate in funding these activities with a cost share of 75 to 100% as defined in the attached petition. ATTACHMENTS 1. Resolution 2. Petition 3. Letter from Lake Riley Improvement Association CITY OF CHANHASSEN CARVER AND HENNEPIN COUNTIES, MINNESOTA RESOLUTION NO.2003- RESOLUTION RELATING TO THE RILEY AND RICE MARSH LAKE WATER QUALITY IMPROVEMENT PROJECTS WHEREAS, Riley Lake and its tributary lake, Rice Marsh Lake, are important features within the City of Chanhassen; and WHEREAS, the City Council is committed to water quality improvement within Riley Lake; and WHEREAS, there is a documented relationship between deteriorating water quality within Riley Lake and the current storm water ponding system; and WHEREAS, the City of Chanhassen has determined that improvements to the storm water treatment system and fishery habitat are required to fully realize the recreational potential of the lake. NOW, THEREFORE, BE IT RESOLVED, the City Council desires to complete those items recommended within the Riley and Rice Marsh Lake Use Attainability Analyses to improve the quality of storm water runoff entering Riley Lake and hereby approves the attached petition to the Riley -Purgatory -Bluff Creek Watershed District to: Upgrade of five (5) existing storm water ponds that do not meet NURP standards; Construction of four (4) storm water ponds in areas where storm water is not treated prior to discharge; and Treatment of each lake with an alum product to remove phosphorus from the water column. BE IT FURTHER RESOLVED, the City Council does request that the Riley -Purgatory - Bluff Creek Watershed District participate in funding these activities with a cost share of 75 to 100% as defined in the attached petition. ADOPTED by the Chanhassen City Council January 2003. Tom Furlong, Mayor EWll I ATTEST: Todd Gerhardt, City Clerk PETITION OF THE CITY OF CHANHASSEN TO RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT FOR THE LAKE RILEY AND RICE MARSH LAKE BASIC WATER MANAGEMENT PROJECTS I. AUTHORITY The City of Chanhassen petitions the Riley Purgatory Bluff Creek Watershed District, pursuant to the provisions of the Minnesota Statutes Sections 103D.201, 103D.605, 103D.705, and 103D.905, to undertake a basic water management project to protect and improve the water quality in Lake Riley and Rice Marsh Lake. II. PURPOSE The purpose of the project is to improve the water quality of Lake Riley by reducing internal and external sources of phosphorus in and to the lake that contribute to alga growth, resulting in decreased water quality, clarity and transparency. The Minnesota Board of Water and Soil Resources approved and the Riley Purgatory Bluff Creek Watershed District Board of Managers adopted a watershed management plan that assessed the condition of the lake through determination of its physical, chemical and biological qualities. The approved and adopted watershed management plan dated May 1996 is incorporated by reference. This project in the cities of Chanhassen and Eden Prairie will help remedy water quality impacts from: 1) municipal sewage treatment discharges that were made to Rice Marsh Lake through the early 1970s; 2) future construction of T.H. 312 between Lake Riley and Rice Marsh Lake; and 3) increased urbanization within the watershed. The Lake Riley and Rice Marsh Lake Use Attainability Analyses dated April 2002 and November 1999 respectively are incorporated by reference. M. GENERAL DESCRIPTION OF WORK PROPOSED AND PURPOSES The project proposes application of alum -plus -lime treatments and storm water management improvements to improve the water quality of the Lake Riley and Rice Marsh Lake. Application of the alum -plus -lime treatments will remediate prior municipal sewage treatment discharges, while the storm water management improvements will limit impacts from the highway construction and increased urbanization within the lake watershed. Through 1972, the City of Chanhassen discharged treated sewage wastewater into Rice Marsh Lake, resulting in high phosphorus levels within the sediments on the bottom of the lake. Although wastewater discharges were discontinued, the excess phosphorus from years of discharge continues to degrade the water quality of Lake Riley via flows from Riley Creek. Approximately 54% of the phosphorus entering Lake Riley flows from Rice Marsh Lake through Riley Creek. Phosphorus recycled from Rice Marsh Lake sediments into Riley Creek waters is a major contributor the phosphorus draining into Lake Riley. Proposed water quality improvements are expected to reduce the phosphorus recycled from lake sediments to the overlying lake water that would otherwise support alga growth or blooms. Within the City of Chanhassen, the project includes a proposal to treat Lake Riley and Rice Marsh Lake with an alum -plus -lime slurry. The proposal also calls for upgrading five (5) existing storm water management basins and the construction of four (4) new storm water basins. The new and upgraded basins will conform to the standards for the National Urban Runoff Ponding Basins and the requirements of the Minnesota Pollution Control Agency. Petition of the City of Chanhassen of Riley -Purgatory -Bluff Creek Watershed District Riley and Rice Marsh Lake Basic Water Management Projects January 2003 Page 2 of 3 Overall the project will increase the recreational use of swimming in Lake Riley by reducing the phosphorous loads to the lake thereby limiting the number of days the actual water quality exceeds the standard for recreational swimming. This is a Trophic State Index (TSI) of 53 (<40 mg/1), which is the guidance published by the Minnesota Pollution Control Agency to assess full support for primary contact recreation and aesthetics. The project intends continued monitoring and re-evaluation of the effect of constructing the proposed improvements for the purpose of determining whether additional controls are required. The proposed work is consistent with additional controls, if required to maintain the existing beneficial uses of Riley and Rice Marsh Lakes. 1V. DESCRIPTION OF THE LANDS OVER WHICH THE PROPOSED IMPROVEMENTS ARE LOCATED The project will be located on property that is directly or indirectly tributary to Lake Riley, Rice Marsh Lake and Riley Creek that is located on the eastern and western boundaries of Chanhassen and Eden Prairie respectively. Within Chanhassen, the project will be located in the general area west of Dell Road and east of Trunk Highway 101 between Pioneer Trail and Trunk Highway 5 in the City of Chanhassen. The improvements are described in detail in the Riley and Rice Marsh Lake Use Attainability Analyses, which are incorporated by reference. V. GENERAL DESCRIPTION OF THE PART OF THE DISTRICT AFFECTED The affected lands are located in the cities of Chanhassen and Eden Prairie and include the riparian and tributary drainage areas to Lake Riley, Rice Marsh Lake and Riley Creek. Generally, the affected areas are south of Trunk Highway 5, east of Trunk Highway 101, and north of Pioneer Trail. The approximate centerline of the affected property is located along the municipal boundary between Chanhassen and Eden Prairie. Rice Marsh Lake is located in the cities of Chanhassen and Eden Prairie and has a 821-acre watershed containing woodlands, marsh, residences, parks and open spaces. The lake's direct watershed consists of 378 acres of low and moderate density housing, 348 acres of parks and open space, 50 acres of industrial and 26 acres of commercial land use. Riley Creek is the outlet from Rice Marsh Lake to Lake Riley. Riley Creek has a 10 square mile watershed, with mild topography in the upper and middle portions of the watershed and a steep, north -valley wall of the Minnesota River on the downstream end of the watershed. Riley Creek originates from lakes Lucy and Ann, and flows through Lake Susan, Rice Marsh Lake and Lake Riley before it begins its descent to the Minnesota River. This project will focus on the stretch of the creek between Rice Marsh Lake and Lake Riley. Finally, Lake Riley has a direct drainage area of 818 acres consisting of 449 acres of low - density residential, 286 acres of parks and open, 1 acre of commercial, and 82 acres of agricultural property. The lake has a maximum depth of approximately 50 feet, and a mean depth of approximately 23 feet. Water flows from Rice Marsh Lake to Lake Riley through Riley Creek. Lake Riley's total drainage area, including both direct and indirect drainage, is over 4,500 acres. VI. NEED AND NECESSITY FOR THE PROPOSED IMPROVEMENT Prior years of municipal wastewater discharges to Rice Marsh Lake has deposited excessive Petition of the City of Chanhassen of Riley -Purgatory -Bluff Creek Watershed District Riley and Rice Marsh Lake Basic Water Management Projects January 2003 Page 3 of 3 amounts of phosphorus that untreated will impact Lake Riley for decades. The continued development in tributary areas and the scheduled construction of T.H. 312 between Lake Riley and Rice Marsh Lake necessitates water quantity management and treatment of water quality to protect and improve the scenic, recreational and wildlife of those specific lakes and the overall water quality of the District. VII. THE PROPOSED IMPROVEMENT WILL BE CONDUCIVE TO THE PUBLIC HEALTH, CONVENIENCE AND WELFARE The City of Chanhassen petitions for the project because it will be conducive to the public health, convenience and welfare of the District and the City. Completion of the project, and associated recreational improvements, will preserve and enhance the public use and enjoyment of Riley and Rice Marsh Lakes and their adjacent parks, all of which are significant natural resources of the District and region. VIII. FINANCING OF THE PROPOSED IMPROVEMENT The project is identified in the Riley Purgatory Bluff Creek Watershed District Water Management Plan and is a priority project of common benefit to the entire District. Minnesota Statutes Section 103D.905, Subdivision 3 provides for the project financing of the basic water management features of the project. The District will fund 100% of the costs of the project with the exception of any easement or property acquisition. The City will share (25%) in the cost of the cost of any such acquisitions. The cost to the City may not exceed $100,000 unless prior written approval is obtained from the City. IX. PROJECT ABANDONMENT The City of Chanhassen hereby states and acknowledges that it will pay all costs and expenses that may be incurred by the activities described in this petition in the event the project is dismissed, no construction contract is let, or the City withdraws its project petition. CITY OF CHANHASSEN Mayor of City of Chanhassen CITY OF CHANHASSEN City Manager LAKE RILEY IMPROVEMENT ASSOCIATION November 26, 2002 - REC€: Ms. Lori Haak 140V 2 7 2002 City of Chanhassen CITY OF CHANHASSEIv Water Resources Coordinator 7700 Market Boulevard Chanhassen, MN 55317 Dear Ms. Haak: For over 30 years it has been the goal of the our association to promote the cue and betterment of Lake Riley. Our association is comprised of homeowners and other interested users of the lake. Our membership strives to improve the quality and safety of this fine recreational resource. After reviewing the Use Attainability Analysis (UAA) for Lake Riley and Rice Marsh Lake as was prepared by Bur Engineering for the Riley -Purgatory -Bluff Creek Watershed District, we fully endorse their findings and goals for our lake. We feel that a study for developing a plan to improve the quality of Rice Marsh Lake and Lake Riley is needed now. As Eden Prairie and Chanhassen become more fully developed it will become important to control any phosphorous entering our lake in order to keep it a viable recreational lake. Sincerely, David Florenzano LRIA President The Wynnfield Homeowners Association 18692 Erin Bay Eden Prairie, Mn. 55347 To Whom It May Concern, REVIVED 07:11 2 3 2002 CITY OF CHANHASSEN 12/03/02 The Wynnfield Homeowners Association has reviewed the Rice Marsh Lake and Lake Riley Use Attainability Analyses, and feel the recommendations included in these studies should go forward. We suggest that the cities of Eden Prairie and Chanhassen petition the Watershed District to undertake the recommendations set forth in these analyses. Thank you. Sincerely, The Wynnfield Homeowners Association Board LAKE RILEY IMPROVEMENT ASSOCIATION November 26, 2002 REC17 Ms. LoriHaak 140V 2 7 zooz City of Chanhassen CITY OF CHANHASSEN Water Resources Coordinator 7700 Market Boulevard Chanhassen, MN 55317 Dear Ms. Haak: For over 30 years it has been the goal of the our association to promote the care and betterment of Lake Riley. Out association is comprised of homeowners and other interested users of the lake. Our membership strives to improve the quality and safety of this fine recreational resource. After reviewing the Use Attainability Analysis (L)AA) for Lake Riley and Rice Marsh Lake as was prepared by Barr Engineering for the Riley -Purgatory -Bluff Creek Watershed District, we fully endorse their findings and goals for our lake. We feel that a study for developing a plan to improve the quality of Rice Marsh Lake and lake Riley is needed now As Eden Prairie and Chanhassen become more fully developed it will become important to control any phosphorous entering our lake in order to keep it a viable recreational lake. Sincerely, David o//J/ LRIA president Haak, Lori From: Roger N. Knutson [Roger@ck-law.com] Sent: Wednesday, December 18, 2002 1:24 PM To: 'Haak, Lori' Subject: RE: Lake Riley/Rice Marsh Lake Improvements change "should" to "may" and add at the end "from the city" -----Original Message ----- From: Haak, Lori[mailto:lhaak@ci.chanhassen.mn.us] Sent: Wednesday, December 18, 2002 12:00 PM To: Roger N. Knutson Subject: RE: Lake Riley/Rice Marsh Lake Improvements How's this language?? (last sentence) Lori VIII. FINANCING OF THE PROPOSED IMPROVEMENT The project is identified in the Riley Purgatory Bluff Creek Watershed District Water Management Plan and is a priority project of common benefit to the entire District. Minnesota Statutes Section 103D.905, Subdivision 3 provides for the project financing of the basic water management features of the project. The District will fund 100% 0£ the costs of the project with the exception of any easement or property acquisition. The City will share (25%) in the cost of the cost of any such acquisitions. The cost to the City should not exceed $100,000 unless prior written approval is obtained. 1 THE PETITION OF EDEN PRAIRIE AND CHANHASSEN TO THE RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT FOR THE LAKE RELEY/RICE MARSH LAKE BASIC WATER MANAGEMENT PROJECT I. AUTHORITY This petition, submitted by the City of Eden Prairie and the City of Chanhassen pursuant to the provisions of the Minnesota Statutes Sections §103D.605, §103D.705, Subd. 2(5) and 3(e) and §103D.905, Subd. 3, requests the Managers of the Riley Purgatory Bluff Creek Watershed District to undertake a basic water management project to protect and improve water quality in Lake Riley and Rice Marsh Lake. II.PURPOSE The purpose of the project is to improve the water quality of Lake Riley by reducing internal and external sources of phosphorus in and to the lake that contribute to alga growth, resulting in decreased water quality, clarity and transparency. The project will help remedy water quality impacts from: 1) municipal sewage treatment discharges that were made to Rice Marsh Lake through the early 1970's; 2) protect against future water quality degradation from the construction of T.H. 312 between Lake Riley and Rice Marsh Lake; and 3) increased urbanization within the watershed. The petition seeks to improve the water quality for recreation, water quality, aquatic communities, and wildlife in accord with the 1996 Watershed Management Plan approved by the Board of Water and Soil Resources and adopted by the Managers. III. GENERAL DESCRIPTION OF WORK PROPOSED AND PURPOSES The project proposes application of alum -plus -lime treatments and the stormwater management improvements to improve the water quality of the Lake Riley and Rice Marsh Lake. Application of the alum -plus -lime treatments will remediate prior municipal sewage treatment discharges, while the stormwater management improvements will limit impacts from the highway construction and increased urbanization within the lake watershed. Through 1972, the City of Chanhassen discharged treated sewage wastewater into Rice Marsh Lake, resulting in high phosphorus levels within the sediments on the bottom of the lake. Although wastewater discharges were discontinued, the excess phosphorus from years of discharge continues to degrade the water quality of Lake Riley via flows from Riley Creek. Approximately 54% of the phosphorus entering Lake Riley flows from Rice Marsh Lake through Riley Creek. Phosphorus recycled from Rice Marsh Lake sediments into Riley Creek waters is a major contributor the phosphorus draining into Lake Riley. Water quality improvements are expected from application of the alum -plus -lime slurry treatment that will reduce phosphorus recycle from lake sediment to the overlying lake water that would otherwise support alga growth or blooms. An additional 30% of the phosphorus ters the Lake Riley from direct and indirect sources in the Jake's watershed. The project will sub tially limit phosphorus from entering the lake as a result of further urbanization and constructio f T.H. 312 within the tributary drainage areas. The District is proposing to construct up to 5 st water detention basins to treat stormwater runoff that will result from the construction of T.H. 3 tween Lakes Riley and Rice Marsh. IV. DESCRIPTION OF THE LANDS OVER WHICH THE PROPOSED IMPROVEMENT IS LOCATED The project will be located on property that is directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek that is located on the eastern and western boundaries of Chanhassen and Eden Prairie respectively. The project lands are described in detail in the Lake Riley Use Attainability Analysis prepared by the Board of Managers, whieh-4&4hentific foundation%r-the Vrojeet. V. GENERAL DESCRIPTION OF THE PART OF THE DISTRICT AFFECTED The affected lands are located in the cities of Eden Prairie and Chanhassen and include the riparian and tributary drainage areas to Lake Riley, Rice Marsh Lake, and Riley Creek. Generally, the affected areas are south of T.H. 5, east of T.H. 101, and north of Hennepin County Road 4. The approximate centerline of the affected property is located along the municipal boundary between Chanhassen and Eden Prairie. Rice Marsh Lake is located in the cities of Chanhassen and Eden Prairie and has a 821-acre watershed containing woodlands, marsh, residences, parks and open spaces. The Lake's direct watershed consists of 378 acres of low and moderate density housing, 348 acres of parks and open space, 50 acres of industrial, and 26 acres of commercial land use. Riley Creek is the outlet from Rice Marsh Lake to Lake Riley. Riley Creek has a 10 square mile watershed, with mild topography in the upper and middle portions of the watershed and a steep, north -valley wall of the Minnesota River on the downstream end of the watershed. Riley Creek originates from lakes Lucy and Ann, and flows through Lake Susan, Rice Marsh Lake, and Lake Riley before it begins its descent to the Minnesota River. This project will focus on the stretch of the creek between Rice Marsh Lake and Lake Riley. Finally, Lake Riley has a direct drainage area of 818 acres consisting of 449 acres of single- family homes, 286 acres of parks and open, 1 acre of commercial, and 82 acres of agricultural property. The lake has a maximum depth of approximately 50 feet, and a mean depth of approximately 23 feet. Water from Rice Marsh Lake flows to Lake Riley through Riley Creek. Lake Riley's total drainage area, including both direct and indirect drainage, is over 4,500 acres. VI. NEED AND NECESSITY FOR THE PROPOSED IMPROVEMENT Prior years of municipal wastewater discharges to Rice Marsh Lake has deposited excessive amounts of phosphorus that untreated will impact Lake Riley for decades. The continued development in tributary areas and the scheduled construction of T.H. 312 between Lake Riley and Rice Marsh Lake necessitates water quantity management and treatment of water quality to protect and improve the scenic, recreational and wildlife of those specific lakes and the overall water quality of the District. VII. THE PROPOSED IMPROVEMENT WILL BE CONDUCIVE TO THE PUBLIC HEALTH, CONVENIENCE AND WELFARE The residents of the District petition for the proposed in -lake water treatments and stormwater best management practices noting that they will be conducive to the public health, convenience and welfare. Completion of the project, and associated recreational improvements, will preserve and enhance the public use and enjoyment of Lakes Riley and Rice Marsh which are significant natural resources of the District and region. VIII. FINANCING OF THE PROPOSED IMPROVEMENT The project is identified in the Riley Purgatory Bluff Creek Watershed District Water Management Plan and is a priority project of common benefit to the entire District. Minnesota Statutes Section 103D.905, Subdivision 3 provides for the project financing of the basic water management features of the project. IX. PROJECT ABANDONMENT The Petitioners hereby state that they will pay all costs and expenses that may be incurred in case the project is dismissed, no construction or implementation project is let, or Petitioners withdraw the project petition. PETITIONERS Dated: , 2002 CTTY OF EDEN PRAIRIE By Mayor By City Manager 4 Dated: , 2002 CITY OF CHANHASSEN Mayor City Manager Haak, Lori From: Leslie Stovring [Istovring@ci.eden-prairie.mn.us] Sent: Tuesday, December 10, 2002 2:54 PM To: BObermeyer@barr.com; Ihaak@ci.chanhassen.mn.us; LHaik@haik.com Cc: rrosow@grjn.com Subject: Riley & Rice Lake Petition Ai City Council Authorization to ... After discussion with our City attorney, Eden Prairie would like to go ahead with the following petition. It will be a single petition from the City of Eden Prairie rather than a joint one that is signed by both parties. The attached is a copy of the full Council agenda item, resolution and petition that is going to the December 17, 2002 Council meeting. By sending a single petition it allows the City to call out what portion of the project is specific to Eden Prairie and it also clarifies responsibility on the City's part in case of project abandonment. This will also allow us to get the petition in to the Watershed District quicker without having to wait to see when Chanhassen is ready to follow with theirs. if the District Managers would like to see both Cities submit a petition at the same time, the City would be willing to hold the petition until Chanhassen is ready to submit their own petition. Thank you Leslie Leslie A. Stovring Environmental Coordinator City of Eden Prairie 8080 Mitchell Road Eden Prairie, MN 55344-4485 phone (952)949-8327 fax (952)949-8390 lttovring@edenprairie.org 1 Riley Purgatory Bluff Creek Watershed District Conference Report Date: November 14, 2002 Location: Eden Prairie City Hall Attendees: Bob Obermeyer — Barr Engineering Perry Forster — President, RPBCWD David Florenzano — President, Lake Riley Improvement Assoc. Peggy Era] — Wynnfield Home Owners Assoc. Leslie Stovring — City of Eden Prairie Lori Haak— City of Chanhassen Shelby Gallagher - City of Chanhassen Subject: Lake Riley and Rice Marsh Lake Improvement Projects RECEIVED DEC 0 6 2002 CITY OF CHANHASSEN The following is a summary of the meeting that took place on the above date. If you are not in agreement with anything said in the summary, please notify the Watershed District. Bob Obermeyer opened the meeting by explaining the procedures for initiating a watershed improvement project. The basic mechanism is a petition. This can come from at least 50 affected property owners or from the affected cities. In this case, the petition would have to come from both Eden Prairie and Chanhassen because the lakes are in both cities. The advantage of having the cities petitioning the project is that homeowners are not liable for any of the project preparation costs should the Watershed District decide after ordering an evaluation of the project that it should not proceed. Following receipt of the petitions, the Watershed District would order the preparation of an Engineer's Feasibility Report. The District's engineer (Barr Engineering) would prepare the report that would outline the proposed a plan, an estimate of the costs, and a timetable for the work to take place. Upon the receipt of the Engineer's Feasibility Report, the Watershed managers would order a public hearing to discuss the merits of the project. The plan would also be sent to the MDNR and BWSR for their comments. At the hearing, the comments of the government agencies would be taken into account. The action at the end of the hearing would be for the Watershed to either order the project to proceed or to reject the project. Bob Obermeyer also explained the funding methods for the project. All water -related costs would be paid for by the District on a 100% basis. All other costs would be on a shared basis between the cities and the Watershed District. Bob Obermeyer explained that it would take 6 — 8 months to complete all of the work necessary prior to the actual start of the project. Leslie Stovring reported that the City of Eden Prairie is anxious to proceed with the project. Leslie is ready to present a petition to the Eden Prairie City Council for their approval. Lori Haak indicated that she would like to wait until the new council is formed in Chanhassen to present a petition for its approval. ::ODMA\PCDOC S\DOCS\237650\1 Bob Obermeyer explained that the ideal time to begin this project would be next fall. This is the best time of the year for cleaning of ponds and the building of new ponds if they are required. Two key components for the project is the alignment of the new Highway 212 and finding space for 4 — 5 ponds that will be required for storm water detention. In order to accommodate that timetable the Watershed would need to receive the petitions at their February meeting for the process to begin. The meeting date is February 5. Bob Obermeyer will provide the cities with sample petitions for the project. It was agreed that the homeowners associations would send letters of support for the project to the City Councils of Eden Prairie, Chanhassen and the Watershed District. Letters to the Watershed should be sent to the attention of Bob Obermeyer at Barr Engineering. Summary prepared by Perry Forster cc: RPBCWD Managers Paul Haik ::ODMA\PCDOCS\DOCS\237650U 2 i Ice Kv9:30 �es�iG ST6 !ginovt �Iwj.174u+a Pe ,- . e, A l 56 ws to da r W- v Ic a ws 25% b C�'-des i -IALM h 55M d- -l•- 0n ovcj I Riley Legal Advisor: Kre South 225 Sixth Street, Suite 4320 Minneapolis, MN 55415 Purgatory 612 333-7400 Fax: 612 333-6959 B I ff Creek Engineering Advisor: Barr Engineering u 4700 West 77th Street Watershed District 35 Minneapolis, MNFax: 95 952 832-2600 Fax: 952 632-2601 Web Site: http//wwvv.rileypurgatorybluffcreek.org Communication Lexicon Communications Consultant: 15246 65th Place North Maple Grove, MN 55311 763-557-5244 April 1, 2005 Mr. Tom Furlong Mayor City of Chanhassen 7700 Market Blvd PO Box 147 Chanhassen, MN 55317 Re: Lake Riley Basic Water Management Project Dear Property Owner: At a public hearing held on December 20, 2004, the Managers of the Riley -Purgatory - Bluff Creek Watershed District ordered the construction of the Lake Riley Basic Water Management Project. The project will improve the water quality of Lake Riley and Rice Marsh Lake. New storm water detention ponds will be constructed, and existing ponds will be upgraded to achieve these important goals. This construction may have a direct impact upon your property. The District's engineer and I would like to meet with you in late May to early June 2005. Meeting at that time will allow you to gather your thoughts and questions so we can directly answer questions and concerns. The engineer is currently performing the necessary survey and planning work to prepare for construction. When that work is finalized I will contact you to schedule a meeting time. In anticipation of the meeting, I am enclosing a copy of the order establishing the Lake Riley Basic Water Management Project and a copy of the Summary Appraisal Report on your property. Board of Managers Howard Peterson Perry Forster Conrad Fiskness Philip Wright Susan Scribner Mr. Tom Furlong City of Chanhassen Re: Lake Riley Basic Water Management Project April 1, 2005 Page 2 of 2 Please contact me with any questions. My direct dial number is 612.333.7400. Sincerely, RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT B_v Paul R. Haik, Legal Advisor Enclosures cc: Managers STATE OF MINNESOTA RILEY PURGATORY BLUFF CREEK WATERSHED DISTRICT ----------------------------------------------------------- IN RE: FINDINGS, CONCLUSIONS OF LAW, LAKE RILEY BASIC WATER AND ORDER ESTABLISHING PROJECT MANAGEMENT PROJECT 42003-01 Following a duly noticed public hearing on the above -captioned project, the Board of Managers of the Riley Purgatory Bluff Creek Watershed District make the following findings, conclusions of law and order: 1. In 1996, the Board of Water and Soil Resources approved and prescribed the Riley - Purgatory -Bluff Creek Watershed District Water Management Plan. See Exhibit 1. 2. The Plan adopted state and national goals and policies for the water resources within the District. 3. The Plan also announced the District's intention to achieve unique goals specific to individual water resources to include goals for water quantity, water quality, recreation, fish, and wildlife. 4. Water resource goals would be established through a three step process of (1) an inventory and assessment, (2) an analysis of attainable uses, and (3) best management planning to identify projects and capital improvements necessary to achieve stated water resource goals. 5. An attainable use analysis evaluates existing and potential beneficial uses of a water resource by making a scientific assessment of a water body's physical, chemical, and biological condition. 6. The use attainability analysis includes a diagnosis of observed problems and prescription of alternative remedial measures, and thus provides the scientific foundation for a water body -specific best management plan that will permit maintenance of existing, or attainment of intended beneficial uses. 7. The Plan articulated specific goals for Lake Riley: a. A water quantity goal of providing sufficient water storage during a flood; b. A water quality goal of attaining and maintaining full support of swimming and fishing; c. A recreation goal of achieving a water quality which supports swimming throughout the summer period; d. An aquatic communities goal of achieving a water quality which fully supports fishing; and e. A wildlife goal of protecting existing beneficial uses. See Exhibit 1 at 356-58. 8. The Plan noted no specific goals for Rice Marsh Lake, but noted Rice Marsh Lake is expected to continue primarily as an aesthetic amenity supporting fish and wildlife without being expected to provide significant opportunities for either boating or swimming. See Exhibit 1 at 322- 23. 9. A use attainability analysis was conducted for Rice Marsh Lake in tandem with Lake Susan because of the close relationship of the two lakes and their watersheds. See Exhibit 2 at 3. 10. The Rice Marsh Lake use attainability analysis (UAA), dated December 1999, was based upon historical water quality data, the results of an intensive 1997 lake water quality monitoring 2 program, and computer simulations of watershed runoff (given then current land use and projected future conditions) calibrated to the 1997 data set. See Exhibit 2 at 1. 11. Rice Marsh Lake has an open water surface area of approximately 81 acres and a mean depth of approximately 5 feet, and the lake water level is controlled mainly by weather conditions and by the elevation of the streambed of Riley Creek, which drains Rice Marsh Lake to the southeast. See Exhibit 2 at 11. 12. Rice Marsh Lake has a high concentration of phosphorous in the sediments due to prior discharge of effluents from a wastewater treatment plant. See Exhibit 1 at 354. 13. Rice Marsh Lake received sewage effluent from the Village of Chanhassen sewage treatment plant and from the sewage treatment plant serving the Lakeview Hills Apartments until the early 1970's. See Exhibit 1 at 354. 14. Phosphorous is a nutrient that controls plant growth in a lake, and chlorophyl a is a measure of the plant growth (algae) found in the open water. See Exhibit 1 at 135. 15. The introduction of excessive nutrients such as phosphorous can lead to an imbalance in a lake's ecosystem that reduces water quality. See Exhibit 1 at 136. 16. Reducing phosphorous in a lake is required to reduce algal abundance and improve water transparency. See Exhibit 2 at A-3. 17. Rice Marsh Lake also receives phosphorous loads from external sources such as runoff and from upstream lakes via Riley Creek. See Exhibit 2 at 21. 18. The water quality of Rice Marsh Lake, however, is strongly influenced by internal phosphorous loading, which refers to the periodic release to the overlying water column of phosphorous from lake sediments. See Exhibit 2 at 22. 3 19. Internal loading occurs through chemical and physical processes that cause phosphorous to be released from lake sediments and resuspended or dissolved into the lake water. See Exhibit 2 at 22, A-3 toA-4. 20. Analysis of water quality data collected on Rice Marsh Lake indicates phosphorous levels and chlorophyll a have dropped significantly since the early 1970's. See Exhibit 2 at 19-20; Exhibit 10 at 7. 21. The Water Management Plan concluded that the trend of declining total phosphorous concentrations in Rice Marsh Lake was caused by declining internal loads rather than to declining external loads. See Exhibit 1 at 355. 22. The declining internal phosphorous load was caused by a combination of two factors: (1) depletion of phosphorous from the lake' sediments due to the release of phosphorous into the overlying waters; and (2) deposition of sediments containing less phosphorous have buried phosphorous -rich deposits resulting from discharge of wastewater treatment effluents. See Exhibit I at 355. 23. Despite these improvements, the water quality of Rice Marsh Lake has not improved significantly. See Exhibit 2 at 20. 24. Rice Marsh Lake remains extremely rich in nutrients, and the lake is likely to experience continued high levels of internal phosphorous loading. 25. Two thirds of the annual phosphorous load of Rice Marsh Lake is the result of internal phosphorous loading. See Exhibit 1 at 354. 26. The Rice Marsh Lake use attainability analysis recommended a reasonable water quality goal of maintaining total phosphorous concentrations in the lake at levels lower than 105 µg/L, which would result in improvements to the lake's aesthetic appeal, a reduction in the frequency of 4 odor -producing algal blooms, and enhancement of the lake's role as a fish spawning area. See Exhibit 2 at 9-10. 27. The Rice Marsh Lake use attainability analysis predicted that as only a relatively small portion of the immediate watershed of Rice Marsh Lake was expected to undergo conversion to more intensive urban land uses, neither the quality nor the quantity of storm water runoff from the watershed should be expected to change greatly as a result of ongoing urbanization, but the analysis also noted that land use changes should be expected to be accompanied by provision for storage and treatment ponds to mitigate the effects of those changes. See Exhibit 2 at 15. 28. In order to achieve and maintain the recognized beneficial uses of the lake, the Rice Marsh Lake use attainability analysis recommended upgrading existing storm water detention ponds by increasing their volume; adding ponds in certain sub -watershed areas which currently have none; and treating the lake with alum. See Exhibit 2 at 40-43, 49-51. 29. The upgrading of existing ponds in the Rice Marsh Lake sub -watershed would result in improved runoff treatment effectiveness and reduced phosphorous loading to the lake, but it would not be expected to produce significant water quality benefits. See Exhibit 2 at EX-6. 30. The addition of water quality treatment ponds in areas not currently served by ponds would provide a significant reduction in phosphorous loading of 9 to 16 µg/L. See Exhibit 2 at EX-7. 31. In -lake alum treatment would provide both a temporary and a long-term improvement in the water quality of Rice Marsh Lake. See Exhibit 2 at 42. 32. The temporary benefit would result from the alum's ability to remove phosphorous from the water column which in turn inhibits algal growth by depriving the algae of phosphorous, a required nutrient. See Exhibit 2 at 42. 5 33. As the alum floc settles it removes suspended particulate matter and enhances water clarity. See Exhibit 2 at 42. 34. Water clarity determines recreational use -impairment. See Exhibit 3 at 8. 35. The long -tern benefits result from the alum's ability to bind phosphorous after the alum comes to rest on the lake sediment surface, thereby preventing the transfer of sediment -bound phosphorous back to the water column (i.e. preventing internal loading). See Exhibit 2 at 42. 36. The most significant purpose of the alum treatment is to act as a thin "blanket" sealing in the sediment -bound phosphorous and preventing internal loading and continuing deleterious effects from prior discharge of wastewater treatment effluents. See Exhibit 2 at 42; Exhibit 3 at 37.. 37. This process would accelerate the reduction of total phosphorous noted above. See Exhibit 2 at 50. 38. One of the most important benefits from the reduction in phosphorous loading in Rice Marsh Lake from external and internal sources would be the resulting improvement in the water quality of Lake Riley downstream. See Exhibit 2 at 49. 39. Modeling results indicate that the water quality of Rice Marsh Lake has a major impact on the water quality of Lake Riley. See Exhibit 1 at 354. 40. The outflow from Rice Marsh Lake through Riley Creek accounts for approximately 75 percent of the total external phosphorous load to Lake Riley. See Exhibit 1 at 355. 41. Lake Riley has a surface area of 286 acres, a maximum depth of approximately 50 feet, and a mean depth of approximately 23 feet, and Riley Creek enters Lake Riley in the northeast side of the lake and continues at the outlet in the southeast side of the lake. See Exhibit 1 at 340. 42. Lake Riley is used for all types of recreational activities, including swimming and fishing. See Exhibit 1 at 344, 345-46; Exhibit 3 at 23. 6 43. A 250 acre park owned by the city of Eden Prairie has a boat launch and a swimming beach. See Exhibit 1 at 344. 44. The Metropolitan Council has recognized Lake Riley as a "Priority Lake" due to its multiple recreational uses. See Exhibit 10 at 5. 45. However, the discharge of excess phosphorous to Lake Riley has resulted in degraded water quality. See Exhibit 3 at 32. 46. The current water quality of Lake Riley is poor, and recreational activities are impaired by summer algal blooms. See Exhibit 3 at iii; Exhibit 1 at 349-50. 47. The lake is currently unable to fully support swimming under wet and average climatic conditions and existing watershed uses, and the lake will be unable to support swimmable use under all climatic conditions and proposed future watershed land uses. See Exhibit 3 at 47. 48. The Lake Riley use attainability analysis, dated April 2002, evaluated water quality data from 1971 through 1998. See Exhibit 3 at 6-7. 49. This evaluation indicated that the water quality in Lake Riley has remained relatively stable over time, and the lake's poor water quality is related to excessive inputs of phosphorous from (1) runoff; (2) Rice Marsh Lake internal loading (i.e. sediment phosphorous release and vegetation decay) conveyed to Lake Riley via Riley Creek; (3) Lake Riley internal loading (i.e. sediment decay); and (4) atmospheric deposition. See Exhibit 3 at iii. 50. Total phosphorous data collected from Lake Riley from 1997 through 1998 indicate that the lake's water quality fluctuates during the summer and has the potential for being poor when the lake's use for swimming and other recreational use is highest. See Exhibit 3 at 7-10. 7 51. Computer simulations of runoff water quality indicated that Lake Riley will experience an increased total phosphorous load under proposed future land use conditions, including phosphorous loading from the proposed Highway 312 project. See Exhibit 3 at 33-35, 43. 52. The Lake Riley storm water conveyance system is comprised of a network of storm sewers and wet detention ponds within the direct watershed tributary to the lake. See Exhibit 3 at 30. 53. The seven storm sewer systems that discharge into Lake Riley add between 18 to 29 percent of the lake's annual phosphorous load. See Exhibit 3 at 39. 54. All stormwater conveyed to Lake Riley via these seven storm sewers is treated by at least one detention/water quality basin before it is discharged to the lake. See Exhibit 3 at 39. 55. The direct watershed to Lake Riley contributes stormwater to the lake via overland flow along the land area immediately adjacent to the lake and does not receive treatment before entering the lake. See Exhibit 3 at 33. 56. The amount of phosphorous added to the lake from the direct watershed represents between 8 to 11 percent of the lake's annual load. See Exhibit 3 at 33. 57. Riley Creek receives stormwater runoff from Lake Riley's direct and indirect watersheds and conveys the runoff to the lake. See Exhibit 3 at 34. 58. Much of the stormwater runoff from the lake's direct watershed is treated by wet detention ponds prior to entering Lake Riley via Riley Creek. See Exhibit 3 at 34. 59. The amount of phosphorous added to Lake Riley from Riley Creek under existing land use conditions represents between 51 and 61 percent of the lake's annual load. See Exhibit 3 at 34. 60. Lake Riley can achieve the water quality needed to fully support swimming by reducing phosphorous loads to the lake. See Exhibit 3 at 48. 8 61. The Lake Riley use attainability analysis concluded that the District's water quality goals for Lake Riley could be exceeded by employing either of the following improvement alternatives: the treatment of Rice Marsh Lake with alum; or the treatment of both Lake Riley and Rice Marsh Lake with alum to remove excess phosphorous currently present in the lakes; in addition to the treatment of storm water runoff through the construction of four or five detention ponds. See Exhibit 3 at 64. 62. The use attainability analysis concluded that the first alternative of treating just Rice Marsh Lake would take several years before the District's goals would be met, while the treatment of Lake Riley would result in rapid improvement in water quality. See Exhibit 3 at 64. 63. The use attainability analysis therefore recommended a plan to improve the water quality of Lake Riley through the treatment of Rice Marsh Lake and Lake Riley with alum in addition to the treatment of highway runoff through the construction of detention ponds. See Exhibit 3 at 64. 64. A substantial reduction in Rice Marsh Lake's internal phosphorous load through treatment with alum is expected to reduce Riley Creek's total phosphorous load at the outlet from Rice Marsh Lake by approximately 65 percent. See Exhibit 3 at 36. 65. The treatment of Rice Marsh Lake would therefore result in a reduction in the total amount of phosphorous added to Lake Riley from Riley Creek, ranging from 218 to 618 pounds of phosphorous annually under existing watershed conditions. See Exhibit 3 at 38. 66. Treatment of Lake Riley with alum will remove excess phosphorous currently present in the lake and result in low phosphorous concentrations and the rapid attainment of the lake's water quality goal. See Exhibit 3 at 48. 67. An alum treatment of Lake Riley would also reduce the lake's internal phosphorous load by approximately 90 percent for a period of 10 years. See Exhibit 3 at 48. 9 68. Wet detention ponds consist of a permanent pool of water and have the capacity to hold runoff and release it at lower rates than incoming flows. See Exhibit 3 at 27. 69. During a storm event, polluted runoff enters the detention basin and displaces "clean water" until the plume of polluted runoff reaches the basin's outlet structure, at which point the polluted runoff has been diluted by the water previously held in the basin. See Exhibit 3 at 27. 70. In addition the course sediments transported by the polluted runoff and the pollutants associated with these sediments are trapped in the detention basin. See Exhibit 3 at 27. 71. Wet detention ponds are one of the most effective methods available for treatment of nutrient -rich runoff. See Exhibit 3 at 27. 72. The construction of Trunk Highway 312 will add approximately 75 acres of highway land use to Lake Riley's watershed, and the total phosphorous load from the highway will represent up to 5 percent of the total future phosphorous load for Lake Riley. See Exhibit 3 at 43. 73. If no new ponds are constructed to treat highway runoff waters, total phosphorous loading to Lake Riley will increase. See Exhibit 3 at 43. 74. The treatment of highway runoff waters through the construction of 4 or 5 detention ponds will therefore minimize phosphorous loading increases to Lake Riley. See Exhibit 3 at 43, 64. 75. At the February 5, 2003 meeting of the Managers, the Cities of Chanhassen and Eden Prairie petitioned the Riley -Purgatory -Bluff Creek Watershed District, pursuant to the provisions of Minnesota Statutes Sections 103D.201, 103D.605, 103D.705, and 103D.905, to undertake a basic water management project to protect and improve the water quality in Lake Riley and Rice Marsh Lake. See Exhibit 6. 76. The Managers directed the District's Engineer to report whether the project was feasible and provide a plan of the proposed project. 10 77. The project proposes to protect and improve the water quality of Lake Riley and Rice Marsh Lake through the application of alum -plus -lime treatments and storm water management improvements. See Exhibit 10 at 13-15. 78. The project proposes to upgrade existing runoff detention ponds and construct additional runoff detention ponds. See Exhibit 10 at 13-15. 79. These improvements were recommended in the Lake Riley and Rice Marsh Lake use attainability analyses prescribed by the adopted and approved Watershed Management Plan. See Exhibit 10 at 2. 80. The improvements are predicted to achieve in -lake water quality conditions which will fully support recreational uses now and in the future. See Exhibit 10 at 19. 81. The improvements will also provide storm water treatment for discharges associated with the proposed Trunk Highway 312. See Exhibit 10 at 13-15. 82. The proposed project is located on lands directly or indirectly tributary to Lake Riley, Rice Marsh Lake, and Riley Creek on the eastern boundary of Chanhassen and the western boundary of Eden Prairie. See Exhibit, Appendix D. 83. On August 7, 2003, a draft of the Engineer's Report was transmitted to the Cities of Chanhassen and Eden Prairie for their review and comment. See Exhibits 7 and 8. 84. In response to the comments from these cities, the Draft Engineer's Report was revised by adding to the project the detention ponds recommended in the Lake Susan/Rice Marsh Lake Use Attainability Analysis. See Exhibit 9. 85. Following the recommendation of the Manager of Fisheries of the Minnesota Department of Natural Resources, the construction of a rough fish barrier above and below Rice Marsh Lake were also added to the project. See Exhibit 9. 86. The Engineer's Report was further revised following the core sampling of the sediments of Rice Marsh Lake during the winter of 2003 — 2004, and the report was reissued May 2004. See Exhibit 10. 87. The Engineer determined that while trend analysis indicates that total phosphorous concentrations in Lake Riley have steadily declined over a 30-year period, more recent data suggest phosphorous concentrations may now be rising as the lake's watershed is urbanizing. See Exhibit 10 at 7. 88. The Engineer found that under existing watershed land -use conditions Lake Riley's water quality is best under near -average to dry weather, and that poorer water quality has been observed in wetter -than -normal years. See Exhibit 10 at 7. 89. The Engineer further found that this pattern of poorer water quality in years with relatively wet conditions is expected to persist into the future after ultimate watershed land use development has been achieved. See Exhibit 10 at 7. 90. The Engineer predicted, however, future water quality of Lake Riley will be generally improved as agricultural lands without runoff controls will be replaced by suburban residential and highway land uses which include runoff detention ponds. See Exhibit 10 at 8. 91. The Engineer predicted the water quality of Rice Marsh Lake would degrade somewhat as the lake's watershed approaches ultimate land use. See Exhibit 10 at 12. 92. The Engineer recommended implementation of the recommendations contained within the Lake Riley Use Attainability Analysis. See Exhibit 10 at 13-20. 93. The Engineer determined that the alum plus lime treatments of Lake Riley and Rice Marsh Lake may be undertaken immediately, depending on regulatory review of permit applications; rough fish barriers above and below Rice Marsh Lake will be constructed soon thereafter, in 12 coordination with MnDOT highway construction; and construction of Highway 312 detention ponds will be done in cooperation with MnDOT as the highway is constructed. See Exhibit 10 at 17. 94. The Engineer found this Project is a necessary and feasible part of the District's Water Management Plan. See Exhibit 10 at 20. 95. The report of the Engineer was filed with the Managers and submitted to the Director of the Minnesota Department of Natural Resources Division of Waters and the Minnesota Board of Water and Soil Resources for review. See Exhibit 11. 96. The Director and the Board filed with the Managers their advisory reports approving the project as being a practical plan. 97. The advisory report of the Director noted that Department of Natural Resources staff would be involved in the construction of the rough fish barrier, for which a work in public waters permit may be required, and the report stated that the construction of the storm water ponds would not require a permit from the Department unless construction dewatering of more than I million gallons a day is needed. See Exhibit 13. 98. The advisory report of the Board included several specific comments noting certain errors in the report and requesting clarification of other sections of the report. See Exhibit 12. 99. The advisory report of the Board noted the Engineer's Report should include certification by the engineer of record; requested clarification of the Watershed District's goal for Rice Marsh Lake; would benefit from the inclusion of the identification of the proposed alignment of Trunk Highway 312 on several figures; and should include supervision and administrative costs on the cost estimate. See Exhibit 12. 100. The advisory report of the Board also noted the District's goals for Rice Marsh Lake were not included in the Engineer's Report. See Exhibit 12. 13 101. The Engineer's report has been revised to address the recommendations of the Director and Board. See Exhibit 15. 102. Pursuant to Minnesota Statutes Section 103D.721, the Managers determined the benefits or damages to the property affected by the proposed project, including property owned by the state or a state agency, highways, and other property likely to be affected by the proposed improvements or that may be used or taken for construction, implementation, or maintenance. 103. The Managers made these determinations by first soliciting bids from licensed professional appraisers for the completion of limited appraisals on the properties likely to be affected by the project. 104. Following the receipt of these bids at their October 6, 2004 meeting, the Managers approved a motion accepting the bid of the lowest responsible bidder, the Shenehon Company. See Exhibits 16 and 17. 105. The appraiser completed limited appraisals for each of the properties identified in the Engineer's Report as property that may be used or taken for the construction, implementation, or maintenance of the project and prepared Summary Appraisal Reports in compliance with the Uniform Standards of Professional Appraisal Practice for a Summary Report. See Exhibits 18-28. 106. The Engineer revised his Report to include the preliminary land acquisition costs, as determined in the Summary Appraisal Reports, for the proposed water quality basins to be constructed as part of the project and accordingly revised the estimated total cost of completing the Lake Riley Basic Water Management Project. See Exhibit 42. 107. At their November 3, 2004 meeting, the Managers passed a Resolution authorizing the Attorney to record a notice of pendency of the District's proceeding to acquire property required 14 and necessary for construction of the Lake Riley Basic Water Management Project in the office of the county recorder where the property is located. See Exhibit 29. 108. Following the November 3, 2004 meeting the Attorney caused to be filed the notices as required by law. 109. An Affidavit of Filing for each Notice of the pendency of the District's proceeding to acquire property has been completed, and these Affidavits of Filing are attached as Exhibits 30 through 41, 110. At a special meeting held on November 10, 2004, the Managers passed a Resolution accepting the revised Report of the Engineer, accepting the Summary Appraisal Reports of the Licensed Professional Appraisers, and authorizing the Report of the Engineer, as amended, be transmitted to the Director of the Division of Waters of the Department of Natural Resources and to the Board of Water and Soil Resources. See Exhibit 43. 111. The revised Report of the Engineer has been transmitted to the Director and the Board to reflect appraised land acquisition costs. See Exhibits 44 and 45. 112. The Director reviewed the revised Report of the Engineer and in a letter to the Managers and the Engineer stated that the Division of Waters has no further comments beyond those contained in the Director's initial advisory report. See Exhibit 114. 113. At a special meeting held on November 10, 2004, the Managers also passed a Resolution ordering a final hearing on the Lake Riley Basic Water Management Project to be held on Monday, December 20, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota; authorizing the Attorney to give notice by publication of the final hearing in the manner prescribed by Minnesota Statutes Section 103D.741, Subd. 1; authorizing the Attorney to give the final hearing notice by mail, and in the manner prescribed by Minnesota Statutes Section 103D.741, 15 Subd. 2, to the Director of the Division of Waters of the Department of Natural Resources, and to each person, corporation, and public body that owns property benefited or damaged by the proposed project; and authorizing the Attorney to serve the final hearing notice on the owners of property to be acquired in the same manner as a summons in a civil action. See Exhibit 46. 114. On November 11, the Attorney directed the publication of the Final Hearing Notice and map of the properties affected by the project in the Sun Sailor, Sun Current, Chaska Herald, Chanhassen Villager, and the Eden Prairie News for four consecutive weeks beginning the week of November 15, 2004. 115. The above -mentioned newspapers published the Final Hearing Notice and map of affected properties, and completed the Affidavits of Publication. See Exhibits 48 and 49. 116. The Attorney requested that the Carver County Sheriff, the Hennepin County Sheriff, the Ramsey County Sheriff, and Metro Legal Services serve the Notice of Final Hearing upon all parties with an interest in the properties necessary for construction of the Lake Riley Basic Water Management Project. 117. The County Sheriffs and Metro Legal Services have effected service upon the following parties, and Certificates/Affidavits of Service are attached as Exhibits 50 through 109. 118. As required by statute, the Final Hearing Notice was mailed to the Director and to each person, corporation, and public body that owns property benefited or damaged by the proposed project. See Exhibits I I I and 112. 119. In addition, the Final Hearing Notice was also mailed to members of the Lake Riley Improvement Association and the Wynnfield Homeowners Association. See Exhibit 113. 120. Following the Notice required by law, the Managers held a public hearing on December 20, 2004, 2004 at 7:00 p.m. at the Eden Prairie City Hall, 8080 Mitchell Road, Eden Prairie, Minnesota, 16 to determine whether the Lake Riley Basic Water Management Project should be established and ordered. 121. The Managers heard all parties interested for and against the establishment of the proposed project. 122. The Managers find implementation of the Project will advance the policy of the State of Minnesota, as expressed in Minnesota Rule 7050.0185, to protect all waters from degradation from point and nonpoint sources and wetland alterations, and to maintain existing water uses, aquatic and wetland habitats, and the level of water quality necessary to protect these uses. 123. The Managers find the intent of the proposed Project is to prevent the degradation of the waters of Lake Riley and Rice Marsh Lake by implementing procedures to remedy past degradation of the waters and improve water quality for future uses. 124. The Managers find, as a political subdivision of the State of Minnesota, the Riley -Purgatory - Bluff Creek Watershed District is charged with the duty of advancing the purposes of the Minnesota Environmental Policy Act of preventing or eliminating damage to the environment. See Minnesota Statutes Section 116D.01. 125. The Managers find, as a governmental subdivision, the Riley -Purgatory -Bluff Creek Watershed District is charged with a duty to cooperate with the Minnesota Pollution Control Agency in obtaining compliance with the provisions of the State Water Pollution Control Act and to enforce within its jurisdiction all standards, orders, rules, or permit requirements adopted by the agency. See Minnesota Statutes Section 115.06. 126. The Managers find by attaining or maintaining the beneficial uses of Lake Riley and Rice Marsh Lake through treating internal phosphorous loading and reducing external sources of phosphorous to these lakes, the proposed Project will advance these purposes in a manner consistent 17 with the state's environmental policy of using all practicable means and measures to promote the general welfare and to create and maintain conditions under which human beings and nature can exist in productive harmony. See Minnesota Statutes Section 116D.02. 127. The Managers find the proposed Project will retard and repair the adverse effects from the prior introduction of sewage effluents. 128. The Managers find the potential capacity of Lake Riley and Rice Marsh Lake to assimilate additional wastes is limited and that the beneficial uses inherent in these water resources are valuable public resources. 129. The Managers find the Project will protect Lake Riley and Rice Marsh Lake from significant degradation from point and nonpoint sources and wetland alterations, and at least maintain existing water uses, aquatic and wetland habitats, and the level of water quality necessary to protect these uses. 130. The Managers find the Project will implement the policy of the State of Minnesota to protect all waters from significant degradation. See, Minnesota Rules 7050.0185. 131. The Managers find Lake Riley is a significant natural resource as shown by its designation as a "priority Lake." 132. The Managers find the proposed Project will have long-term beneficial effects on this natural resource. 133. The Engineer concluded no long -tern adverse impacts to natural resources are expected to result from implementation of the improvements proposed under the Project. See Exhibit 42 at 19. 134. The Managers find by preserving and improving water quality and habitat, the proposed Project will advance the State and District goals for wildlife and aquatic communities. 18 135. Therefore, the Managers further find the proposed Project will have significant beneficial and consequential effects on other natural resources. 136. The Managers find the proposed Project will achieve the District's goal of "fishable/swimmable" uses for Lake Riley. 137. The Managers find the proposed Project will achieve the attainable beneficial uses of Rice Marsh Lake of supporting fish and wildlife. 138. The Managers find the proposed Project will restore and maintain the chemical, physical, and biological integrity of the waters of Lake Riley and Rice Marsh Lake, and, therefore, the Project is compliant with the primary objective of the Clean Water Act, 33 U.S.C. § 1251, et seq. 139. The Managers further find that funding the Project's costs through a levy of 0.00798 percent of taxable market value will not result in a fundamental alteration of the District's levy. CONCLUSIONS OF LAW 140. Given these findings the Managers conclude the project will: a. be conducive to public health; b. promote the general welfare; c. comply with the Watershed Law; and d. result in benefits greater than the cost of the construction or implementation and damages. 141. The Managers confirm the report of the Engineer and the determination of damages and benefits to the property affected by the Lake Riley Basic Water Management Project. 19 t 142. Having found and concluded as stated above, the Managers establish the Lake Riley Basic Water Management Project and order: a. Construction or implementation of the project as a whole; b. The Engineer to proceed with making the necessary surveys and preparing plans and specifications that are needed to construct the project and report the results of the surveys and plans to the managers; c. The Attorney to negotiate acquisition of needed lands or commence proceedings to do so; d. Recess this hearing until receipt of the report from the Engineer and receipt of bids following duly noticed call by the Manaagers for bids for the construction or implementation of the work. e. Levy of 0.00798 percent of taxable market value upon all taxable property in the Riley -Purgatory -Bluff Creek Watershed District, Hennepin and Carver Counties, for the year 2005 and succeeding years sufficient to pay the costs of the Lake Riley Basic Water Management Project initiated by petitions of the Cities of Chanhassen and Eden Prairie as authorized by Minnesota Statutes Section 103D.905, Subd. 3; f. Immediate filing of this order establishing and authorizing the construction of the Lake Riley Basic Water Management Project with the Secretary of the Watershed District, and filing of a certified copies of this Resolution with the auditors of Hennepin and Carver Counties, the Board of Water and Soil Resources, the Commissioner of Natural Resources, the Director of the Division of Waters of the 20 Department of Natural Resources, the Pollution Control Agency, and the Commissioner of Health. The question was on the adoption of the above resolution and there were 5 ayes and no nays, as follows: AYE NAY Howard Peterson ® ❑ Conrad Fiskness ® ❑ Perry Forster ® ❑ Susan Scribner ® ❑ Philip Wright ® ❑ The Chairman declared the Resolution adopted. Dated this 20th Day of December, 2004. I, Howard Peterson, secretary of the Riley -Purgatory -Bluff Creek Watershed District, do hereby certify that I have compared the above Resolution with the original thereof, as the same appears of record and on file in my office, and find the same to be a true and correct transcript thereof. IN TESTIMONY WHEREOF, I have set my hand and affixed the seal of the said Watershed District this 7ia day of Decemb-2004. oward Peterson, Secretary (SEAL) 21 Barr Engineering Company 4700 West 77th Street • Minneapolis, MN 55435-4803 Phone: 952-832-2600 • Fax: 952-832-2601 Minneapolis, MN • Hibbing, MN • Duluth, MN • Ann Arbor, MI • Jefferson City, MO To: Dan Remer, City of Chanhassen Date: 2/14/05 c: Project #: 23 / 27 — E61 HMR 001 Re: Lake Riley Watr Quality Improvemt Project We are sending you: - - ❑ Correspondence ❑ Reports ❑ Plans ❑ Copy of Letter ❑ Specifications ® Other: Area Location Map No. of Copies Description 1 Area Location Map of proposed pond locations These are transmitted as checked below: ❑ For approval ❑ As requested ❑ Other: ® For your use ❑ For review and comment: Remarks: Dan: This is a follow-up from our phone conversation last week, here is a map of the proposed pond locations for the Watershed Project. We would like to get any as -built information on sanitary sewers, storm sewers, water mains, and anything else that the City may have in the areas marked on the map. Eleven of the 14 sites are in Chanhassen. If you have any questions please give me a call. Thank in advance! Sent by: Jake Burggraff Phone: 952 - 832 - 2743 CITY OF RSSEN ECIEtV EDD FEB 15 2005 ENGINEERING DEPT- DmumenQ Barr Engineering Company 4700 West 77th Street • Minneapolis, MN 554354803 Phone:952-832-2600 • Fax:952-832-2601 Minneapolis, MN a Hibbing, MN • Duluth, MN • Ann Arbor, MI a Jefferson City, MO To: Dan Renner, City of Chanhassen c: Project #: 23 / 27 — E61 HWIR 001 Date: 2/14/05 Re: Lake Riley Watr Quality Improvemt Project We are sending you: ❑ Correspondence ❑ Reports ❑ Plans ❑ Copy of Letter ❑ Specifications ® Other: Area Location Map No. of Copies Description 1 Area Location Map of proposed pond locations LThere transmitted as checked below: pproval❑ As requested ❑ Other: our use ❑ For review and comment: Remarks: Dan: This is a follow-up from our phone conversation last week, here is a map of the proposed pond locations for the Watershed Project. We would like to get any as -built information on sanitary sewers, storm sewers, water mains, and anything else that the City may have in the areas marked on the map. Eleven of the 14 sites are in Chanhassen. If you have any questions please give me a call. Thank in advance! Sent by: Jake Burggraff Phone: 952 - 832 - 2743 )tM -tois - io-13, Eco-Irg -Y-ras-� I I C14AViASSE14 -SVS- l d 7- 3�( Fir. JJ1` FEB 15 2005 ENGINEERING 13EPT 5 f ai. G7 - 66 -2, ?/-/B 7/ `i Woj J .5"- 1 Z. `%2-xz �? 1 Cb�_t i 5 end J K 6' d r, F4 t� i it L4 ! •M• .t.`$ y _ - -!/iTM -% , , . `V sit. r.: e vfi'F .1.ksti','. ♦. .s' .�� I - .} ri.,. o6 Wr i •ti ,kKI t .�j"i \ 1r\ _.'aka a' Nv _ �. _.r:Y� 7 je. . _ :_ .a 1 '`�' :«„'tz'" `� '�. ..,`Irv, ,L,c' I :° . t /• '. t�. �r IG 1� F 4 , r i• .. y ttt ��`YCC ' 1 t . i F""''r'•'rl,d'b.`.7F J I > x rip :r r .. 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