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Tour PacketRP sk ♦ r , - ♦ `i:. � � v ii � s _ - '' * '� �i< l � ' 1 r., � 't y .M•� •. �~ r. ''� •_;� r R "� View .,�=` •` v � = � I • • ,E _ �' L` s - ' ,.... nt.q - • �R - JI t 7 O ♦ 1 I A A y t AT a� � Perk .w � � • ' '�''" � � �.� I � � n_ ., t• � , � 4 � ♦,. s ! wr ► C N.- Prbirnmn' State Hwy � N OILR`J AO ' m 4, I Lake Brtv n is ^... n r , � � p 1 ..zd _ �o =o o CO :J rf 4 Z i Lam: m✓.i `° ZA 4k ♦ . "� :lL..S7 On i Y A I F T ' v CttYOF CmSIX Q) L Q C) cn J � I j n W () r Q 0 � Q - R= 199.86 d= 4177 "GB / Ch 8r9= N89'40'OB - W / t GRADING NOTES ! 1 p �,— c s.lE ox ..,, xr ceaDlm : -I la, .e xws xxrox )D nwn o. � ggg v[rnu ° �ccs ) rr ° [m x41tl1 Exlx.icn swl. � .xonorn n, FU+ °� e. wxm.c)D�D . o W, « � ) rova DxxxnE x[wm ox sm «, wi Iwri . wxw.wx DEmEOmxG. .xo vinsxn nwu� rw san c �� . ALLIANT m snE o[swx cxn[xu sccn0« W xaWEa ,uxuu rax MMIDxLL NOWSSPJNU, WC. Duvwu nMnxD coxsm M�CartxMM swu e< PESPpWBtf N WNNSAPOLIe ADVNt1. RV,TCfm xr«F BD?[ oelw+[D. xD x[Intl )ee.wm I uS le,L teYSOW EROSION CONTROL SCHEDULE: „x m«elxDD,�« Dx D[wDxDD«, 9 xDS� Dx M w — e w 9DU. m a D a wwx rz 5 s< tx,ax sl«I..x .wxD�m.M x«DD, .Exx � I,,. DE[o rDx mow, a J . T � O ✓rzx M[ vs! wWx n M[ xaw nocxvxR uusi xsD 9E 5[xw¢D. ¢. W F Z w nwum.n „<xDwm .s uwun «wsuD Z O owt ,awes ME slrt wsl W U m«a m[ns U Z Ir N N Dc N>W oE,wlcx mw „ Mc co9x,E,n« a coxs,xDnw« °[°pA1m �” W O Z W GRADNG LEGEND m o ExsnxD W Q — 59— MmvO �cOMOUx � cc x.s Row -E o Z 873.0 ew -1 D wwi Y g z Q • xOVO5E0 G)Cx PwGxS J U �. .xOxOSED SiDRU SEWER —E CMDF I n.nev n «IIY m«I Ini. x�en. �YL UNECigx DE OR.,x[,DE fiE � s'r Raon ntv Inn C l£i RRD,Etlgx • Lal. s, SL[ rENC[ xx[sOr, ou— 499URWCF /co— mn ISSUE un N O Y � —IM 0 TEM1 1. PSk 4c� kal xD Pa ��1 ^O �U T QOR o 95 50 100 re9.cn C_2 1DDxD scuE x+ EECr wl[n 5 of 9 City 36 inch Stormwater Pipe runs through site. .e" ice.' j-Y" �+� �w .11r°" y,T � y.�•_, dl,�' J ' \ _ n3 ns .yr•v . +- . ''� ' d _ _ SFr' _ — � �-� / 97L-01 Tvr x° 9C .0 I.I tll :llll :l `t' � llflllfv Pa5PIY1Pllt + j S+ 937. Q �� ,am i tocg�'" Ai F y 1 9�,]. { �� — 6 - ' - -- c Qtl 2 4. r ` s r I I j � •�� +f-�- _ .�s�e $i eq�e. is i � ¢, '� �---' - Yf- r ;12 RW own camp 171• i. � r �. al - -�- 91 a. 9 irt' o.e tY to , }0 +: p� calf t~ 1 f o t6�52� p010 a -' i ` aE N j `j.. �' ' ��^ 911.4" 917_(1 910.5 1W 1 91 Q,, 905.7 BW a := - rx�` IW 9105 TVti' - {� 9C4 -9 B%% 90 .S TirY r' - rr"' �'' . + 1 � l 9'74. 1 d 910.5 Tn' T_' 9C 1` -- �� Stormwater Issues and Green Infrastructure 2 Trees and Stormwater: Communities have done nearly as much as they can to control and manage stormwater through grey infrastructure. Green infrastructure offers new opportunities to meet the challenges of handling stormwater in urban and suburban areas where space and solutions are limited. The current trend for minimum impact development has resulted in increased interest in rate reduction and infiltration strategies. The stormwater benefits of trees are being documented and incorporated into community stormwater management. The future may hold increased reliance on trees as tools for stormwater volume and pollutant reduction. How do trees help with runoff and stormwater? Trees provide stormwater reduction by intercepting rainfall. Rain collects on leaves, is held temporarily and then released down the branches to the trunk. The greatest interception happens with lighter rains which allow the trees to capture the maximum amount. The average precipitation for MN is 20" per year. An average tree will intercept 23% of the precipitation that falls on it, over the course of a year about 4.5" of rain. For a community, increased canopy coverage = increased stormwater management. The greatest stormwater benefits come from mature deciduous trees. It should be every community's goal to grow healthy, mature trees throughout the town. Grey and Green Infrastructure — Grey infrastructure — roads, utilities, drainage systems Green infrastructure — trees, rain gardens, green roofs, wetlands, etc. Trees as green infrastructure —they provide multiple environmental and community benefits. Stormwater runoff reduction Pollutant removal —water and ground Heat island reduction Air quality improvement Human health Crime reduction Increase in property value Wildlife habitat Aesthetics Wind protection and buffer Points to remember R AINF:ILL INTERCEPTION is influenced hy: W Intensity and duration of the rainfall event 9 Tree species — deciduous, broadleaf evergreen, or conifer W Tree architecture—size, number of leaves, and arrangement of leaves and branches W Weather — temperature, relative humidity, net solar radiation, and wind speed TRFFS STORE MORE WATER during a f- inch rainfall event that lasts two days versus one that lasts only two hours. Therefore: 1F As compared to flood events, small storms are responsible for most of the annual pollutant loading of receiving waters W Trees are most effective in intercepting rainfall during small events ig Urban forests are likely to produce more benefits through water quality protection than flood control. n \E OF ouR STUDIES FOUND that a typical medium -sized tree can intercept as much as 2380 gallons of rainfall per year. BROADLEAF EVERGREENS AND CONIFERS intercept more rainfall than deciduous species where winter rainfall patterns prevail. t� 7 . ! tJ' street JV #4 porous pavers grass pavers • sidewalk Reitdo - biks byAlun A. Loomis, http: /Avwu+. del iriouslu.iiet 441 1 Redesign streets where trees work in combination with grass and porous pavers to retain water on site. TREES WORK IN COMBINATION with Other stormwater controls to produce a comprehensive solution to rainfall interception, runoff and landscape water use: ig Backyard cisterns capture roof runoff, and provide supple- mental irrigation 1F Swales hold overflow iF Bermed lawn -area retention basins facilitate infiltration @; Grates/drywells capture driveway runoff STRATEGIES TO ENHANCE the urban forest and improve the control of stormwater runoff: tF Plant more trees in appropriate places ig Improve the maintenance of existing trees iF Plant species with a higher rate of growth where appropriate W Plant species with architectural features that maximize interception 9 Match trees (deciduous, evergreen) to rainfall patterns ig Plant trees in groves where possible W Plant low water -use species W Plant broadleaf evergreens where appropriate and avoid south- facing windows ig Use native plants, which, once established, can easily withstand summer dry seasons and reduce the need for supplemental irrigation. L Oakla r nd, omia, the continuous tree ted to i ntercept 4 inches of re in a typical year— about . NOTE: In looking for solutions to stormwater runoff it is important to consider an integrated approach that uses other water conservation, water retention, flood management, and pollution control strategies. Community solutions include but are not limited to: porous pavement, vegetated swales and filter strips, recharge areas under parking lots, holding tanks and cisterns under playfields, surface area holding ponds, turf grass filters, and riparian retention and treatment areas. For more information on these solutions see the TreePeople website at http:// www. treepeople .org/trees/charrette.htm, and their book, Second Nature: Adapting Los Angeles' Landscape for Sustainable Living, edited by Patrick Condon and Stacy Moriarity. For more information, refer to the following publications: Chang, G.; J. Parrish; and C. Souer. 1990. The first flush of runoff and its effect on control structure design. Environmental Resource Management Division. Department of Environmental and Conservation Services. City of Austin, Austin, TX. 36 pp. Claytor, R. A.; and T. R. Schueler. 1996. Design of stormwater filtering systems. The Center for Watershed Protection, Silver Spring, MD. McPherson, E. G. 1998. Structure and sustainability of Sacramento's urban forest. J. Arbor. 24(4): 174- 190. McPherson, E. G., et. al. 2000. Tree guidelines for coastal Southern California communities. Local Government Commission, Sacramento, CA. 97p. McPherson, E. G., et. al. 1999 Benefit -cost anlysis of Modesto's municipal urban forest. J. Arbor. 25(5): 235 -248. Mao, Q. F., et. al. 2000. Winter rainfall interception by two mature open -grown trees in Davis, California. Hydrol. Process. 14: 763- 784. Mao, Q. F., et. al. 2000. A new approach to modeling tree rainfall interception. J. of Geophysical Research. 105(D23): 29, 173 -29, 188. Mao, Q. F., et. al. 1998. Rainfall interception by Sacramento's urban forest. J. Arbor. 24(4): 235 -244. Trees protect water and soil resources. A healthy urban forest can reduce the amount of runoff and pollutant loading in receiving waters in four primary ways: 1) Through evapotranspiration, trees draw moisture from the soil ground surface, thereby increasing soil water storage potential. 2) Leaves, branch surfaces, and trunk bark intercept and store rainfall, thereby reducing runoff volumes and delaying the onset of peak flows. 3) Root growth and decomposition increase the capacity and rate of soil infiltration by rainfall and reduce overland flow. 4) Tree canopies reduce soil erosion by diminishing the impact of raindrops on barren surfaces. Urban forests can dispose of waste water Urban forests can provide other hydrologic benefits. For example, irrigated tree plantations or nurseries can be a safe and productive means of wastewater treatment and disposal. Reused wastewater can recharge aquifers, reduce stormwater treatment loads, and create income through sales of nursery or wood products. Recycling urban wastewater into green - space areas can be an economical means of treatment and disposal, while at the same time providing other environmental benefits. This fact sheet is provided for you to copy and distribute. Please credit the Center for Urban Forest Research, Pacific Southwest Research Station, USDA Forest Service, Davis, California. July 2002. ., o 3 4i v h m y = <o co Zn Incorporate storniwater treatment hIto street design by adding trees and swales. Prom Green Neighborhoods, a publication (If NeighborhoodLAB, ht tp : / /neighborhoocl.t�orego ».edz ✓. Lake Drive Business Center /Lake Susan y 1 , The Preserve S sa�n �..� r•srw� � -��s �: t fit:. � � .1 r ,� R' 'ri n'S vl NTH.• Cur red p—emee BUNCreek P6kney -id., , C i1r ff S . 401 p r " Y Y k- FIR y�nclhl. (10 H 18) The Preserve at Bluff Creek, 3rd Addition NPDES Compliance Monitoring ad^ 1 �2 S 4 Y } l ,SA;; fi 1 � n �~ fa r I a a Yh d N *Violations SC4_j SC1 M2 M3 -!'� SC3 - M1 EC1 Preserve 3rd 9/14/2011 G: /ENG /krista/JVPDES 11/2011 Inspection Reports & Letters1Preserve3rdNPDES.mxd * Violations correspond to NPDES Permit requirements as listed in the NPDES Compliance Monitoring Program Report dated July, 28, 2011. NPDES COMPLIANCE MONITORING PROGRAM Authority: Minnesota Pollution Control Agency (MPCA) Stormwater Division NPDES Permit Inspection City of Chanhassen Project Name: The Perserve at Bluff Creek Lot 1 Block 1 Location: City of Chanhassen City: Chanhassen County: Carver Preferred ID: SUB0029936 Water Project: Inspection Date: 7/27/2011 Inspector: Chip Hentges, Carver SWCD, 952.466 -5263 Weather Conditions: sunny Site Conditions: DRY CONDTIONS Submit a written response to all non - compliant or under review items noted in this inspection report within 7 Comments: business days of receipt. Include copies of inspection and maintenance records from 1 -1 -2011 through 7 -27- 2011. Please call meat the number above if you have questions Carver SWCD, 11360 Hwy 212 Suite 6, Cologne, MN 55322 Attn. Chip Hentges INSPECTION CHECKLIST Status 7J28J201 I Pagel of 4 Permit Coverage: (Minn. R. 7090.2010): A General Construction Stormwater Permit is required for Requirement construction activity that disturbs land of qual to or greater than 1 acre (or less than 1 acre but part of a compliant Common Plan of Development greater than I acre). Inspection Result: Corrective Action: (None) EC I: Exposed Soils (Permit Part IV.B.2): Exposed, unworked soils (including pond slopes & temporary Requirement stockpiles) must be stabilized with temporary or permanent stabilization BMPs according the timeframes in noncompliant the permit. Inspection Result: dirt piles on curb, and exposed soils behind curb lines Corrective Action: Remove dirt piles along curbs on a daily basis. Temporary stabilize all exposed soils EC2: Ditch Bottoms (Permit Part 1V.B.3): Ditch and swale bottoms must be stabilized 200 feet back from Requirement the property edge or from the point of discharge to surface waters within 24 hours (beyond 200 feet within not inspected 1 14 days after completion of work in the ditch). Inspection Result: Corrective Action: I Requirement (EC3: Energy Dissipation (Permit Part 1V.B.4): Pipe outlets must have energy dissipation within 24 hours I not inspected I after connection to a surface water. Inspection Result: (None) Corrective Action: (None) NPDES COMPLIANCE MONITORING PROGRAM 7/28/2011 Page 2 of 4 SCI: Perimeter Control (Permit Part IV.C.2); Perimeter control must be properly installed and maintained at down gradient perimeters of the project and where land slopes to surface waters (including stormwater Requirement conveyance systems). non compliant M1: Perimeter Control Maintenance (Permit Part IV.E.4.a): Perimeter control BMPs must be maintained when sediment reaches 1/3 of the height of the device or repaired/replaced when BMPs becomes nonfunctional. Perimeter controls were knocked down on several active contruction sites. Need to find a new place to park Inspection Result: dumpster as contractors has to go through perimeter control to get there. No perimeter controls in front of homes along Degler Circle. Corrective Action: Install perimeter controls as defined in the permit and your SWPPP SC2: Inlet Protection (Permit Part IV.C.4): Storm drain inlets must be protected by devices that capture Requirement sediment. non compliant M2: Inlet Maintenance (Permit Part IV.E.4): Inlet control BMPs must be maintained or replaced when rendered ineffective (e.g. filled with sediment, damaged, or device is otherwise compromised)_ Insnectinn Result: Maintain all inlet controls inlet nrotection devices are full Corrective Action: Clean out all inlet protective devices - in writing explain how this was accomplished SC3: Vehicle Tracking (Permit Part IV.C.6): Vehicle tracking of sediment from the construction site (or Requirement onto streets within the site) must be controlled by rock pads or other effective BMPs. non compliant M3: Sediment Tracking (Permit Part IV,EA.d): Tracked sediment must be removed from all paved surfaces within 24 hours of discovery. Inspection Result: Tracking was observed, and sediment was on the street Corrective Action: Streets need to be swept daily Requirement SC4: Stock Piles (Permit Part IV.C.6): Temporary soil stockpiles must have silt fence or other effective under review sediment controls at the base of the pile. Inspection Result: Temporary stabilize all stockpiles Corrective Action: SC5: Dewatering (Permit Part IV.D): Dewatering or basin draining (e.g. pumped discharges, trench/ditch Requirement cuts for drainage) related to the construction activity must not adversely affect the receiving water or not inspected downstream landowners. Inspection Result: No dewatering was observed. Corrective Action: Requirement SC6: Temporary Sediment Ponds (Pennit Part III.B): Temporary sediment basins are required during r c.�r - , li2nt construction where 10 or more acres drain to a common location. Corrective Action: (None) Requirement PP SC 7: Infiltration Areas (Permit Part IV.E.5): Infiltration areas must be protected from compaction and not applicable sedimentation during construction activities. Please notify the S WCD prior to construction (952.442.5101). Inspection Result: Corrective Action: SC8: Other Sediment Controls (Permit Part IV.C.1): Sediment control practices must minimize sediment Requirement from entering surface waters, including curb and gutter systems and stone sewer inlets. Sediment control not inspected practices require maintenance when ineffective. Inspection Result: NPDES COMPLIANCE MONITORING PROGRAM 7/28/2011 Page 3 of 4 Corrective Action: NPDES COMPLIANCE MONITORING PROGRAM 7/28/2011 Page 4 of 4 Requirement P1: Solid Waste (Permit Part IVY. I ): Solid wastes resulting from construction activities must be disposed of� properly. under review Inspection Result: Construction material spread on pads that are not being built Corrective Action: Sites need to be cleaned up Requirement P2: Hazardous Materials (Permit Part IV.F.2): Hazardous materials (such as fuels, lubricants, solvents) must not inspected T he properly stored, including secondary containment. Inspection Result: (None) Corrective Action: (None) P3: Concrete Washout (Permit Part IV.F.4): All liquid and solid wastes generated by concrete washout Requirement operations must be contained in a leak -proof containment facility or impermeable liner. All washout areas under review must be identified, including trucks and masonry mixing stations. Inspection Result: Report on how contractor is handling concrete wash. Corrective Action: Requirement SW I: Discharges to Surface Waters (Minn. R. 7050.0210): Discharges of stonnwater from the site to not inspected surface waters may not cause nuisance conditions such as discoloration, sediment plumes, or deltas. Inspection Result: Corrective Action: Requirement SW2: Removal of Sediment from Surface Waters (Permit Part IV.E.4.e.): Sediment deposited in surface not inspected waters (including drainage systems, catch basins) must be removed within 7 days of discovery. Inspection Result: Corrective Action: Requirement �D 1: Stormwater Pollution Prevention Plan (Permit Part III.D): The Stormwater Pollution Prevention Plan non compliant ' must be retained at the site during construction. --- '��- Inspection Result: SWPPP Box not observed Corrective Action: Install S W PPP Box and have every contractor sign off that they aware of the storinwater issues Requirement D2: Stormwater Pollution Prevention Plan (Permit Part III,A): The Stormwater Pollution Prevention Plan non compliant conforms to all applicable items outlined in Part III.A of the permit. Inspection Result: (None) Corrective Action: (None) Ds: Inspection and Maintenance Records (Permit Parts III.D & IV,E): Site inspections and maintenance Requirement activities must be recorded and retained at the site. The inspector must be trained according to permit non compliant specifications. Insnection Result: IJnder review Corrective Action: Submit inspection reports as stated. Requirement AR: Additional requirements or conditions not identified as checklist items. not ins ected Inspection Result: (None) Corrective Action: (None) Non - Compliant Requirements. • M1: Perimeter Control Maintenance(Permit Part IV.E,4.a.): Perimeter control BMPs (Best Management Practices) must be maintained when sediment reaches 1/3 of the height of the device or repaired /replace when BMPs becomes nonfunctio. r k Pal ,�� • .�� lr� " 0. Non - Compliant Requirements: SCI Vehicl Tracking (Permit I 1 jftjg,tracking of ii a ago " o ld me 19 191 Litt L IOIL v y - �. :s- �. ��.�i� rr�. ,;.��" -• * ti.. � _ a�.�• . " ,- wed _ �.� � - _w E y t^' � yyp •a , `+� t .9 S�F �;';� A _ i,,jrd 9 ''!'rrx � �' 3 r��' � r r l� 'f y '' r r� x b _ ` �.— `" FA A ;O v PON r ' �` R : . f . rte .�.�� ;ii� ;'D��.• r.1 � '�. '- `�p� fi ' � l s - •' , q .�,. . T- Ikon- Compliant Requirements: SC1: Perimeter Control (Permit Part IV.C.2): Perimeter control must be properly installed and maintained at down gradient perimeters of the project and where land slopes to surface waters (including stormwater conveyance systems). 1 � t� r1' 91 J I v_:J4j_:�J, Ad Imo"' .� .. - , _ F i ..d ��' .•_ � "�'®NM' dome& s t. ...rte ,OWL ® ,_✓ ,: I1� � c 1�1 e - S , -� ._ �� c�jJltlJ •1 ^ rt�� . ;''11�'' • o .�-, ��!' �•r}Jtf I'rJ�.}'' F��III �tl }��i�� J�F15'flJllr�.EPr�'c f � a Sti, ,.. -:� 3 �� .i}� -� �4wer. �.' ��` :►~ "G,`".F.. y M -.M►r - V e t D �r�r! w ��-� . c. . L ��M�'! Y. f►G t '~ R AM TM` r .• �� ,I nsfrw MA t o rJrt -' to 0 ^• f r — _ r yl�_wS�� - � - :z -" - �?!�'Di .- r�s' ►' - -_ . `' � /rf 'tom � -."s .'.. J . - r. Non - Compliant Requirements: • EC1: Exposed Soils (Permit Part IV.B.2 ':1. ;� °;er, rked soils most be stabilized with temporary or permanen tabiliz t the timeframes in the w W %- fie-- i`r 'rJ ft t a k ��F� �-� . - ► .. _ _ - yea V '�t� .. , ',� .y:- � 3 �� al �� K - •V �- � ♦ ^ •�Pr. may.. '* .`"� .. .tea. �^y .. _ak' ,i 1 `Cf _ �Y^ Y .; . i Y /Y�'� ^ti �► ��y� J _ _ ' , f ,{ 4 '"` y`... e � .. .i[u .�._• .a � ... `�ry_t. ^1-.�l tom. 'JVL - � I � r �' -� ": .�, i y L =- : 1 �-- _ =v- �� . o omplianf Re kr6eotsi • l�2�. IV�a�r�ten��ce � ' 1 t qui e t;w : mu* maintained. or I air D'elow: Sediment- removed f r properly d'ispo3*d of. Contra 3t 1 4L A 1 -40 .7 'e .e to 7t. pliant Requirements: `- Piles (Permit Part IV•C•6): Temporary It I l .... L. 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T i 5 R .7t I TT �� 11 191 i 8�b888 3 v r a 0 0 z 0 n. 0 1 00 U 1- 4 m w z a / 3 i H w � to � C' CN P N W 00 v1 ° ° Q N z C' z Q U C d � i. v U r / I / I L - ----------- - - - -I- --. I I II 1 1 I ! IFES 81 I I 132LF - 15 RCP Q I I TA:2 +01,45, 11.69 LT I 0 1 9% I I AE 988.50 I j l 12" PERF. PVC L - - - - -- _- - -J I L _ -' L_ DRAIN TILE I j l l j j II I I ( I I L. —,- 220 - - 1 RCP — t i l , I I I 1 ^_ -- 0 0.50% ! { FES 78 I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION OR REPORT WAS PREPARED BY ME OR UNDER NY DIRECT SUPERVISION AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS OF T}IE STATE OF MINNESOTA. Amy �i CA ""'"" '23+37.27. 49.19 LT CITY PROJECT OS - 01 SHEET N0. 3-3 3 -6 IE 985.99 FES 191 I 5 1 1 I 11 1 - J I I I STA:6+28.22, 28.01 LIT 12" PERF. PVC 1 1 1 1{ 1 4 1 1 1 1 1 I, 1 IE 989.OA I DRAIN TILE I I I I I I I 1 1 75LF - 12" RCP I I 00.50% { I { 1 12" PERF. PVC 1 1 1 FES 80 j l 1 1 1 1 1 1 DRAIN TILE 1 STA: 5 +R ,5.213. 25.71 LT I I I iE 988.62 1 1 _ I I I 1 6 6/27/08 IM KR8 DATE: 02/25/2006 CHARD B. LARSON. P.E. DATE 02/25/2008 MN UC. NO. 41864 S . P . o -:n GRADE 8' GRASS TRAIL (TRAIL GRADING IS INCIDENTAL TO POND GRADING) 28LF - 24" RCP 0 1.002 FES 8 IE 952.7 RIP RAP 21LF - 24" RCP 0 EMERGENCY' OVERFLOW ELEV. 959.25 / CL -3 J RIP RAP \___FES 82 IE 950.00 OUTLET CONTROL 83 RE 954.70 1E IN 950.00 IE OUT 953.00 SUMP IE 946.50 � Y 8' BITUMINOUS 1 TRAIL 1 N 1 H73 t:N n 1 I �\\ 1 4 1 I N + 1 f a 1 _ ( ti a `� a -- - -' r ' II \ AA r ,,, , TOGA - /- SARA - - I 1 I i 1 - 1 1 f t l 1 1 V I I 1 I _ 1 I t 0 15 3D 60 HORIZONTAL SCALE IN FEET �y y�0\ / ^ - - - - - - - MH 23A (WEIR RAH j �i J 1 1 1 I I I � 1 r 4 I ` I - -1 I � 1 � 5 ....... .. .;. ... DEPTH; EOTEXTILE FILTER FABRIC, TYPE V (HIGH FLOW RATE, PROPEX 4553 r OR APPROVED EQUAL) GENERAL NOTES: 1) GRADING OF BIORETENTION DEVICES SHALL BE ACCOMPLISHED USING LOW - COMPACTION EARTH MOVING EQUIPMENT TO PREVENT COMPACTION OF UNDERLYING SOILS. 2) ALL SUB MATERIALS BELOW THE B(ORETENTION DEPTH SHALL BE UNDLSTUR8EO. 3) EXCAVATION REQUIRED FOR PLACEMENT OF PLANTING MEDIUM AND 1 -1.5" DOUBLE WASHED STONE SHALL BE INCIDENTAL TO THE DRAINAGE SCALE PLANTING MEDIUM AND 1 -1,5" DOUBLE WASHED STONE PAY ITEMS. DRAINAGE SWALE CROSS SECTION No. I Date I Revisions App. DRAWING NAME CP08- D1- PONDDI-ALT3.DWG _ ❑ Kimiey.Horn J 1 1Vi Il and Associates, Inc, 2350 DMVEnTY AVE WEST. SUITE 34% TEL. NO. (651) g16 -4147 ST. PAUL. MINNESOTA 55114 FAX No. (731) ws -5117 I HEREBY CERTIFY THAT THIS PLAN, SPECIFICATION OR REPORT WAS PREPARED BY ME OR UNDER NY DIRECT SUPERVISION AND THAT I AM A DULY LICENSED PROFESSIONAL ENGINEER UNDER THE LAWS OF T}IE STATE OF MINNESOTA. Amy �i CA ""'"" CITY OF CHANHASSEN 2008 STREET RFCO� ISTRUCTION CITY PROJECT OMI BIDALTERNATE3 ADING PLAN GRADING P CITY PROJECT OS - 01 SHEET N0. 3-3 3 -6 2 5/21/08 REVISED STORM SEWER KRB 3 5/27/08 REVISED STORM SEWER KR8 DESIGNED BY: RJG COUNTY PROJECT DRAWN BY: RJG S L 6/12/08 REVISED POND GRADING KRB CHECKED BY: KRB S.A.P. 6 6/27/08 REVISED POND GRADING KR8 DATE: 02/25/2006 CHARD B. LARSON. P.E. DATE 02/25/2008 MN UC. NO. 41864 S . P . PRO JECT N0. 1 6 0511 01 7 PLANTING MEDIUM - (BY VOLUME): 50 -60% HOMOGENOUS CONSTRUCTION SAND 20 -307. ORGANIC LEAF COMPOST 20 -307. NATIVE TOPSOIL 12" PERF. 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