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Application 10-14-05 INCOMPLETE Planning Case No. OS -3<0 CITY OF CHANHASSEN 7700 Market Boulevard - P.O. Box 147 Chanhassen, MN 55317 - (952) 227-1100 CITY OF CHANHASSEN RECEIVED OCT 1 4 2005 DEVELOPMENT REVIEW APPLICATION CHANHASSEN PLANNING OEPT PLEASE PRINT Applicant Name and Address: .J;A <ScJ,..~Aro~ .~\&1 -.l- \:).-0 J Co r'.p 540 Lc~fC-ok1.:. CQYlP (~ht:L"::"to... /\/LN 5~~ I e Contact: i'-^A-0 ~ ~ Phone: ~'SI \((\) <t @O Fax: q52 l\7() oo1'f Email: S~ \J~r<;)p @ I\t\ 1~ct- Owner Name and Address: S:trvvL Contact: Phone: Email: Fax: -/ Comprehensive Plan Amendment fdJD. ~ r ...A.J , "'" t{.A-r-J~. ( ~c.... yi"\ ~) Temporary Sales Permit Conditional Use Permit Vacation of Right-of-Way/Easements Interim Use Permit Variance Non-conforming Use Permit I Planned Unit Development* 757).: Wetland Alteration Permit Zoning Appeal Rezoning Zoning Ordinance Amendment Sign Permits Sign Plan Review amage Deposit Site Plan Review* -L 13<5 - ~ .-' -=-73'.:> Subdivision" 000. t- ~ "'/>: ) An additional fee of $3.00 per address within the public hearing notification area will be invoiced to the applicant prior to the public hearing. .\0 * Twenty-six (~ full-size folded copies of the plans must be submitted, including an B%" X 11" reduced copy for each plan sheet along with a diqital copy in TIFF-Group 4 (*.tif) format. ** Applicant to obtain notification sign from City of Chanhassen Public Works at 1591 Park Road and install upon submittal of completed application. $100 damage deposit to be refunded to applicant when sign is returned following City Council approval. *** Escrow will be required for other applications through the development contract. ~ Escrow for Filing Fees/Attorney Cost*** - $50 CUP/SPRNACNARIWAP/Metes & Bounds - $450 Minor SUB TOTAL FEE $~ I.a. ~D Building material samples must be submitted with site plan reviews. NOTE: When multiple applications are processed, the appropriate fee shall be charged for each application. PROJECT NAME: rr;.J 7-:;;__ i 'I'f:' u ~;. /'. (,Ii f" (' k.. ~. il .H. ,- ,; I'h' II ~I +~f (' _~ LOCATION: LEGAL DESCRIPTION: A H-a-c~cJ TOTAL ACREAGE: WETLANDS PRESENT: YES NO PRESENT ZONING: REQUESTED ZONING: PRESENT LAND USE DESIGNATION REQUESTED LAND USE DESIGNAT N: REASON FOR REQUEST: This application must be completed in full and be typewritten or clearly printed and must be accompanied by all information and plans required by applicable City Ordinance provisions. Before filing this application, you should confer with the Planning Department to determine the specific ordinance and procedural requirements applicable to your application. A determination of completeness of the application shall be made within 15 business days of application submittal. A written notice of application deficiencies shall be mailed to the applicant within 15 business days of application. This is to certify that I am making application for the described action by the City and that I am responsible for complying with all City requirements with regard to this request. This application should be processed in my name and I am the party whom the City should contact regarding any matter pertaining to this application. I have attached a copy of proof of ownership (either copy of Owner's Duplicate Certificate of Title, Abstract of Title or purchase agreement), or I am the authorized person to make this application and the fee owner has also signed this application. I will keep myself informed of the deadlines for submission of material and the progress of this application. I further understand that additional fees may be charged for consulting fees, feasibility studies, etc. with an estimate prior to any authorization to proceed with the study. The documents and information I have submitted are true and correct to the best of my knowledge. Signature of Applicant ~ r--. }o I~ O~ Date Signature of Fee Owner Date G:\plan\forms\Development Review Application.DOC Rev. 4/05 Please find attached fully executed development review application, legal description, sixteen copies full size preliminary plat and plans, one reduced set of preliminary plat and plans, preliminary drainage calculations, and associated fees for the proposed Bluff Creek Twin Homes subdivision. We request consideration for a Comprehensive Plan Amendment since the current land use is agricultural A2 and the proposed land use is Low Density Residential. Consideration for rezoning to Planned Unit Development because of the unique constraints of the property in regards to the location of the existing Magellan petroleum pipeline and the wetland that lies in the southerly part of the property. Consideration of subdivision approval for the proposed 18 lots and outlot A. Drainage Summary: Bluff Creek Twin Homes, Chanhassen, MN Preliminary Water Ouantity: Existing Conditions Peak Runoff from Type II 24-hr rainfall = 6" (l00 yr storm): 26.16 cfs Proposed Conditions Peak Runoff from Type II 24-hr rainfall = 6" (l00 yr storm): 17.49 cfs (Pond Full to NWL) plus 6.62 cfs Flow directly to wetland 24.11cfs Total Proposed Conditions Preliminary Water Ouality: Water Quality storage required per NURP standards - runoff volume from Type II 24 hr rainfall =2.5": 0.201 Ac-ft. Water Quality Storage provided = 0.244 Ac-ft See attached Hydrocad calculations and drainage areas maps. See also preliminary storm sewer design and drainage maps. CITY ~~g~It~~SSEN OCT 1 4 2005 CHANHASSEN PLANNING DEPT ......,.~..... .....,. -~:"'" ~~~ '~.:'T ....e;;v.. ''"''I '-110, I"{-~,:) 8.8804629"E. 632 .52 NO. HWy '" '" 101 N W COF!NER OF THE S W 114 SEC. 24 ~.I.M. Carver Ca. . ~.~ - .....----- AS LOCATeD 1-23-85 - Ed.tl~p.!E!.. ~ -Z 629.82 697.16 -- 887029'2,''E N ~ 1-.0 v .00 '" ~O v o r-) III ~t-. III ~ ~ III III J: ~ IL 0 III Z ::i ~ (/) III ~ \ / /,AREA" 10.30 Acre, 1 SCALE 1-'" 100' SOUTH LINE OF THE NORTHERLY 730.00 FEET OF THE SW 1/4 SEC. 24 6/4.45 N.88046'29"W. I I S W CORNER OF THE ~ I N 1/2 OF THE SW 1/4 ,660.44 ZUTH LINE OF THE N 1/2 OF THE SW 1/4 OF SEC. 2 4 PROPERTY DESCRIPTION ~~]~" Q. , " MAT "'- "' "' fr ~~.>- . 67.34 ~~e~~~" ':t:' 'S~o' :: .-:7:;;......:.: ,q~;- O"'~ ~ ,,"'d' - \\ 't ~. '" I o ~- \\ \ \ '\ 6/ TUMINOUS o ( ~r m~ ~~ o <1> <1>- 1111 <Ill: NNOl (0 tn <'! .'" '" ~~ ~ II tt <lll: 'L \ \,' \ ~\. ", ~ S.70I3'34"E. ''7217.65 , ,- ,- ,- " A='4Q29tJ1'1.-"o"" 294.88< R=1I66.IS , All 'that part of the northerly 730.00 feet of the North Half of the Southwest Quarter of Section 24, Township 116, Range 23, as measured along the West line thereof and' lying westerly of the centerline of State Highway No. 101. The centeHine of said Highway No. 101 is described as follows: Beginning at a pOint on the North line of the Southwest Quarter of Section 24, Township 116, Range 23, a distance of 632.52 feet east of the Northwest corner of said Southwest Quarter; the bearing of the North line of the Southwest Quarter is assumed to be South 88 degrees 46 minutes 29 seconds East. Thence South 4 degrees 24 minutes 47 seconds West a distance of 413.72 feet thence on a tangential curve, concave to the east having a central angle of 11 degrees 38 minutes ?l se?onds and a radius of 1962.29 feet a distance of 398.62 feet. Thence South 7 degrees 13 minutes 34 seconds East tangent to the last described curve, a distance of 217.65 feet thence on a tangential curve, concave to the west having a central angle of 14 degrees 29 minutes 17 seconds and a radius of 1166.15 feet a distance of 294.88 feet, more or less, to a pOint on the South line of the North Half of the Southwest Quarter of Section 24 and . there terminating said paint distance,G60.44 feet easterly of the Southwest corner, of the North'Half of the Southwest Quarter. I Li"'''by certify thaI this S\JIvey, pia", 01 report " my direct supervisi'on and that I ern f.i duiy Pegi the law~ of the Sta1(~ of Minns,so'/a. Z:;'~:;~~-z:::'_:~ SHEET I OF 2.S~ All in Carver county, Minnesota and subject to all easements of record. $trJ).: 1-2!;.~9S tlJ~ATIt>N OF p/pe ~/N.E -/73 G Existing Conditions ~UbC~ B ~ ~ o e Proposed londitions M Proposed Conditions - flow directly to wetland Pond 1 Drainage Diagram for Bluff Creek Twin Homes - 100 year pond full Prepared by Ryan Engineering, Inc 10/14/2005 HydroCAD<8> 7.00 sin 001971 @ 1986-2003 Applied Microcomputer Systems I j Bluff Creek Twin Homes - 100 yr existing condition calculation Type /I 24-hr Rainfal/=6.00" Prepared by Ryan Engineering, Ine Page 1 HydroCAD@ 7.00 sin 001971 @ 1986-2003 Applied Microcomputer Systems 10/13/2005 5ubcatchment 15: Existing Conditions Runoff = 26.16 cfs @ 12.13 hrs, Volume= 1.814 af, Depth= 3.02" Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr Rainfall=6.00" Area (ac) 5.610 1.600 7.210 CN Description 78 Row crops, straight row, Good, HSG B 65 2 acre lots, 12% imp, HSG B 75 Weighted Average T c Length (min) (feet) 20.0 Slope Velocity Capacity Description (fl/t!) (fUsee) (efs) Direct Entry, 5ubcatchment 15: Existing Conditions Hydrograph 24 22 20- 18, ~ 16: ~ :c 14 0 i:i: 12 10 28 .-.-------4--.--~-----.~---~--.--+- I I I I 26- . , . -' -- -- - -; . -- -- -- ~ -- ---:-- -- - -; ...- -, L, t I I J . .. ,- _ -' _ ". _ _I - _.- t" ~-.- _ n 1-- -. - -~ -. -. - I I I I I -_.-------r-----r-----r-----l-----T----- I I I I I l I I I I ------..--:---...1----- ",0._-- I I I .___.___ __~_ __L._.__ L _.~_ I i I I I j __.. . _: _ _ _ _ .j .0 _ _ .. I- _ u _ 1_ _ _ -~i _. ." _. I , I I r I .. ,- - .-;.- n', -I ---.- r- -- -- '-r- -- -~- I 1 ; I : I ! I ----------r----~--.--I----~----.-.r--- I I I I I _ _ _ __ _ .. _ _ 1 _ _ .. 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' 1 1 I I I : , -:' - i Rur'o~ Depth=3.02-',!,.- :' - - - -:-.., -: -.. -..: -.. - -;- T c=20~O- min-- _. _I __ _ _ _ .l _. ,_ ,_ _ L _ __ _ .J._ _. _ _ _~ _ ._ .. _ .!.. _ ... _ __ :,.. _ _ _ .. : I :: CN=75 ~ - -. - J.- - -.J - - - -i- - - I- - - ,- --1- .- - -, -- - - T" - - .- - '- -. .- - - I I I - r- . 1- Runoff ~ I I - -f - - r - -- - -\- - -...... - -, - - '.- -. - - -- ,- - -- .- - I I I ill 1 . -I -- -- - - T - . -- -, r -. .. - .-j'. '.' - - -, - -- .- - -:-.-.. - .. ,~. -- -- .- I I ._ '. t.. .. _ _ _,_._ _. _ ..:._ _ _ ,._ L _ ,_ .. _ i_ _ .. _ ._ I I ~ 1 o 5 6 7 8 " . I . . . i , 9 10 11 12 13 14 Time (hours) 15 16 ,. I' . 1 . 17 18 19 20 CITY OF CHANHASSEN RECEIVED OCT 1 4 2005 CHANHASSEN PLANNING DEPT .1 I I I ; -----~~/ NW COrptfR OF THe 5 4, see 24 . orver o. (found) \ - - -.......\._ _ _ _ ed~ bituminous ~ // -------------------- _ 0 ~ :HC ~go ^? - - - - - - - - - - -'raff~c....sjg"-::-=--=--=--::-- --- ~caocl /1 r - - - - - - - - - - - 1 0 L..J., traffic sign - ..- - ~er'- ........ ---- I _ _ _ _ _ _ _ _ risers _ \ qraffic sign 0 /" __n -- riser \ Otroffic sign ---- ~ "J I I \. MNDOT yRANS. R/W PLAT No.10-19 \ "~ ! I \) S89'4T52"E 551.18 fauod maoumeo' '\. '\ \ i I \ -./ <ts> I' I '" _ _ --===---= ~<l---" _ _ _ _ _ \ .~> I \ I I -- L - - \- - I ~i I --- ___ found \ I .... - - -----==..- - _ _ _ _ _ ---- ------ '-- MNDOT./)..-j I I - ~ - - ---- - ~ _ _ _ - - - rfionument ;; I - - - _, ____ _P-PROXlMATE LOCATION OF PIPEliNE'E"'SEMJ:N~7 - - - - - ".'(~" " ,I I _ _ ~ ~'n~-- _ ---- /_ Q'" \1 ~: -" ~ - - - - ~,-==- - 1\ i I " " ~ ----.----~\\ 1\ i I --- "',- '_____ _-- ____ V I ____ "8 --- __ __ '" "",5:'610._ ACRES "-- - ___ '- ~;go i I _0'--.. ," ~ --_____. ____ \/ ;:1 / I'- _____...... ,," " \/ "I - '-- _ ____" '9;." ----." 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'\ \ \ ) \ '" , \\\\ I \ \ ,,\ I / \ '\ \ ~ \ \ / \\ ~ \ \ \ \' II \ \ ,\ \ 24"cmb \ I; I \ \ Hydrant 'il'1 S 88'46'29" E 1 I LYMAN hydrant 'il'1 er~~~ -~-~t--~--~ hydrant BLVD. 632.52' --- --- I [> .............. .,. '" <.i l;j ~ '" '" ~ ~ "' ~ /I- (" ,. -1 Iy o ~ / / x SOUTH LINE: OF THe NORTHCRLY 730,00 FeU OF THe sw 1/4 See. 24 N 88'46'29" W 614.45' I 0' I 50' I 100' I 150' 1 Bluff Creek Twin Homes - Nurp Storage calculation - 2.5 inch nTl)pff /I 24-hr Rainfal/=2.50" Prepared by Ryan Engineering, Inc Page 1 HydroCAD@ 7.00 sIn 001971 @ 1986-2003 Applied Microcomputer Systems 10/13/2005 Runoff Subcatchment 2S: Proposed Conditions = 2.95cfs@ 12.10hrs, Volume= 0.201 af, Depth= 0.43" Runoff by ses TR-20 method, UH=SeS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr Rainfall=2.50" I I I 3 .. .. -- ''- '.. ~ -- h .. :- -- - - I 1 1 1 1 I 1 1 , 1 , , 1 1 I -- - -J - -.. r' - -- -- -1 .- -- _. - -I .- - -.. r n - I I J I I 1 I I 1 I I I ; I Area (ac) 4.110 1.500 5.610 T c Length (min) (feet) 15.0 2- ~ ~ ~ o u:: 1 1-' .. -.. 'I 1 , o 5 eN Description 75 1/4 acre lots, 38% imp, HSG B 61 >75% Grass cover, Good, HSG B 71 Weighted Average Slope Velocity Capacity Description (ftlft) (ftlsee) ( efs) Direct Entry, Direct Subcatchment 2S: Proposed Conditions Hydrograph _ __ __ _ _ __ h _ I , , , , ' -_.-_.-.----- .---.---------- , , 1- Runoff~ i .- - -1 - n 1 , 1 I I , I I I I I Type II 24~h r , Rai nfall72. 50" , " Runoff Area=5.61 0 ac I I i u_, ---'R-..JnofrVonjme=..O~20riif' ! I I : : : Runoff Depth=O.43" Tc~15.0 rriin ..,-.....; . ,-CN=71-.. - -~ - -- - - t" -- . , , .. -0 -1--- I .. _. ,.- - *- - "1- - .. , , , , I I I 1 , 'I 6 I' " I' I" I' 15 16 17 18 20 19 7 8 9 10 11 12 13 Time (hours) 14 BLuff Creek Twin Homes - 100 yr pond empty Prepared by Ryan Engineering, Inc HydroCAD@ 7.00 sIn 001971 @ 1986-2003 Applied Microcomputer Systems ~ ~ ~ o u:: / / / / 23' / / / / 22 ~ /' / / / 21 / / /' / 20~ / / / / 19 / / / 18: / / 17~ / / / / 16~ / / 15 / / / / 14 - /' / 13: / / / / / 12 / -' / / 11" / / / / 10~ / / / / 9. / / / / 8 / / / / 7 / / / 6 / / 5. 0 / 4- / / 3 .' 2~ 1" 0" 5 -l Type /I 24-hr Rainfal/=6.00" Page 2 1 0/14/2005 Pond 3P: Pond 1 Hydrograph __ ._ ,_ _ _ _ J .. _ _. _1._ _ _ _" .1 _. ~. ._ __'._ _. _. _ 1_ ~_ __ I I I ! 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J. _ _ _ ._1_ .. _ _ L ._ ._ _ _. _ _ _ ._ L _ .. _ 6 , . 11 12 13 14 Time (hours) 19 I 20 , 15 7 16 17 18 BLuff Creek Twin Homes - 100 yr pond empty Prepared by Ryan Engineering, Inc HydroCAD@7.00 sin 001971 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr Rainfal/=6.00" Page 1 1 0/14/2005 I nflow Area = Inflow = Outflow Primary = Pond 3P: Pond 1 5.610 ac, Inflow Depth = 2.66" 20.85 cfs @ 12.07 hrs, Volume= 14.82 cfs @ 12.18 hrs, Volume= 14.82 cfs @ 12.18 hrs, Volume= 1.241 af 0.983 at, Atten= 29%, Lag= 6.6 min 0.983 at Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 890.08' @ 12.18 hrs Surf.Area= 0.159 ac Storage= 0.400 af Plug-Flow detention time= 88.9 min calculated for 0.980 af (79% of inflow) Center-of-Mass del. time= 33.1 min ( 829.8 - 796.7) # Invert Avail.StoraQe StoraQe Description 1 886.00' 0.467 af Custom Stage Data (Prismatic) Listed below Elevation (feet) 886.00 888.00 889.00 890.00 890.50 # RoutinQ 1 Primary Surf.Area (acres) 0.039 0.095 0.126 0.159 0.160 Cum.Store ( acre-feet) 0.000 0.134 0.244 0.387 0.467 Inc.Store ( acre-feet) 0.000 0.134 0.110 0.142 0.080 Invert Outlet Devices 889.00' 5.0' long x 3.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Primary OutFlow Max=14.64 cfs @ 12.18 hrs HW=890.0T (Free Discharge) "t....1=Broad-Crested Rectangular Weir (Weir Controls 14.64 cfs @ 2.7 fps) Bluff Creek Twin Homes - 100 year pond full Prepared by Ryan Engineering, Inc HydroCAD@ 7.00 sIn 001971 @ 1986-2003 Applied Microcomputer Systems I nflow Area = Inflow = Outflow = Primary = Type /I 24-hr Rainfal/=6.00" Page 1 1 0/14/2005 Pond 3P: Pond 1 5.610 ac, Inflow Depth = 2.66" 20.85 cfs @ 12.07 hrs, Volume= 17.49 cfs @ 12.15 hrs, Volume= 17.49 cfs @ 12.15 hrs, Volume= 1.241 af 1.227 af, Atten= 16%, Lag= 4.6 min 1.227 af Routing by Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 890.21' @ 12.15 hrs Surf.Area= 0.159 ac Storage= 0.175 af Plug-Flow detention time= 13.9 min calculated for 1.223 af (99% of inflow) Center-of-Mass det. time= 9.4 min ( 806.2 - 796.7 ) # Invert Avail.StoraQe StoraQe Description 1 889.00' 0.222 af Custom Stage Data (Prismatic) Listed below Elevation (feet) 889.00 890.00 890.50 # RoutinQ 1 Primary Surf.Area (acres ) 0.126 0.159 0.160 Inc.Store ( acre-feet) 0.000 0.142 0.080 Cum.Store ( acre-feet) 0.000 0.142 0.222 Invert Outlet Devices 889.00' 5.0' long x 3.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 1.80 2.00 2.50 3.00 3.50 4.00 4.50 Coef. (English) 2.44 2.58 2.68 2.67 2.65 2.64 2.64 2.68 2.68 2.72 2.81 2.92 2.97 3.07 3.32 Primary OutFlow Max=17.49 cfs @ 12.15 hrs HW=890.21' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 17.49 cfs @ 2.9 fps) ___n_1 Bluff Creek Twin Homes. 100 year pond full Prepared by Ryan Engineering, Inc HydroCAD@7.00 sin 001971 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr Rainfal/=6.00" Page 2 1 0/14/2005 Pond 3P: Pond 1 Hydrograph / 23; ,. //./ 22:/'/' 21 ~ ..- '" I' / / / 20~ / / 19 ./ / '" / / / 18: " / 17~ /' ,/ 16 15, 14 - ~ 13 ..!:!.. 12- ~11~/'// u:: 1 O..:~ ,/ / / ,- 9: . /' / 8- ,/,/ 7-'/ ,', , , 6 '" /' / 5~ / , 4 ",,/,.. , .' 3: 2~ 1: o 5 I I .. u -: -."- -- -1- .. -. t -- I I -t- n .. ... 1 I --1- - ... - ~. , -- ----- -.-----. I I __ ._ 1_ _ ._ ._ 1 ._"_ _. ...1__ _ _ .n !. _ __ ._ .J._ __ __ _ ,_ __ ._ __ _~ _, _ ._ _. '__ I j I i I ". - .- -i -. .- - ... 1- .- -- .- 'f - .'. - '-1-- .~. - 1 I i I ! 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" - T - - - -I -. - -- .- i - ..' . .. _ J _ _ _ _ 1_ _ _ _ 1 _ _ _ _I 1 __ 1 I I f I '"1 _._- -.l..... -- -t -- -1-- - - ~ 01 - H -- -:~ -. -- - + -. .- - ,- : - .- - - Y' .J ._ _ .. _ ~.. .. .. _~..1- ,_. _ .. _.1_. u .... I I I 1 -- - .- 1- .~ -- ., T "1' -. - r' ._ _I _ _ . ..1._ _ _ _ J I I I , , / , / , / / / / / , - , / 6 9 10 7 , .. - ... -- -.. ..-. , I -.- -. - i' - -. -. ., 20.85 cfs = = =lhflowiArea-:::5~6~o- ac= _ ._ _ ...! _ .,. ._ 1._ _ _ _ .1 __ _ ._ _I _ _ _, ~. .!.. __ _ _ .J .'. __ _ _. L ._ _ _. . - -< -- -Peak' Elev=890;2-1!- 1 , t , 1 , , .. - -. - .-- - - -' 1- . - n 1 -- - - .- J - _. - d T - .. -- .., - - - - 1- - -. - = =: = = = ~:= Stprag,e~a.1"l5= ~f =. _ _ __ ..l __ _' _ _ 1_ .. _ _ J. _ _ _ _.1_ _ _ _ L _ _. _ _' _ _ _ ._ L _ _ _ . f I I i I -.- -, .- - -- -r' - - .. ,. - - -. -1- .. - -- r- -. - - .n r -~. -. _ ._ _. _ _ _. J. _ __ _. ul_ __. _ :_ _. _. _ _.' _ _ _. _ L _ _ _ I I ~ I u -I, - - .- -I. - _ .. -. _ .- - -- l--- - . - I I 1 "i -. -,- .. ... .. -- -. i- - - .- . __ _.1... _. _ _ .l _ _ .. _I.. _ ,.. . _ 0 _. k ._ _ _ I I I .. ~. ~- - - - ---I'" ., ... - T - .~ - -'1'" .- - - ~. ~ - - .- - - --, ... r -. -- - h 1_ _ u _ 1. _ ... _ _1_. _ _ n U' _ _ _ _ _ _. _. I I I ' - 'j -. - .- --I" -.- -. - -- .~ .. ..... -~ - - u, I- I I I J - - - I .. - - -1-- ~ - - j- - - .- .- - '0 - .. 1-- .. .. _ .! _ "'.' ._! '0' _ ~. _ ;_ ~. ._ _. ~ _ _ I I . _. I" - -. -. r -- - .. -,- -. -. ~. ., .. - - --. -. -. I I 11 12 13 Time (hours) , 15 18 19 20 16 17 Bluff Creek Twin Homes - 100 year pond full Prepared by Ryan Engineering, Inc HydroCAD@7.00 sIn 001971 @ 1986-2003 Applied Microcomputer Systems Type /I 24-hr Rainfal/=6.00" Page 2 1 0/14/2005 5ubcatchment 45: Proposed Conditions - flow directly to wetland [46] Hint: Tc=O (Instant runoff peak depends on dt) Runoff 6.62 cfs @ 11.90 hrs, Volume= 0.242 af, Depth= 1.82" = Runoff by SCS TR-20 method, UH=SCS, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr Rainfall=6.00" Area (ac) 1.600 CN Description 61 1/4 acre lots, 38% imp, HSG A T c Length (min) (feet) 0.0 Slope Velocity Capacity Description (fUft) (fUsee) (cfs) Direct Entry, 15 5ubcatchment 45: Proposed Conditions - flow directly to wetland Hydrograph , .* .. -- -~ - - - - 1- - - - -1-- - , I I I I 1 , Iii 1 t I I r --.--------~----~---4----~---~----~----i----~----;---- 6.62 cfs : : : : : : I ! I I i I . ~_ _ _ __ ,; __ __ _ __ ~ _ __ . _~ __ _ __ __ ~ Typ~ JI_24_~.h r _ I j I I I J I : : : Raintall=6.00" I ! I I I r -- - - - ': - -- -- Ru nbffArea=1;600' ac --, I I I I I 1 : Ruhoff'Vol'ume=O.~42' at I ' I I , , I -'---~----_.f--'--)--"-'-T'----'!----.-T----','----- : : Runoff Depth:r=1.82" I I I I I I ' . ~ -- u -~. -- -:-_..;, - -- Tc=O~O min- I I f I ' :: CN=61 I I I I i .. ..... _ - - - I - .. - -1_ - -... ... - - - ~.I-.'. -. - + ~ ,-. - ..:.. - -.- r I I I I I I 1 1 I I I I I I I I _ _ __, h ,_ _. _ L ._ _ _.'. .l _ ~ I I I I I I I I I I I l : I I 2- , I , I I I *. - .< -~ - - .- - f- - -- - -1 I I I I I I I I .. _..1. __ _ _ I 7- I I I I I I I ._ ._ _ -J .. _ _ ._ ~. _ _ _ _1_ _ I I I I I I I 1_ I I , I I 6 5- ~ 4- ~ ;t 0 u: 3- I 0 _I _ _ __ _ __ I I I I I i I -. - - - "I .~-.- . --1- - -. . ':- . - - - - .. I I I I I I u - - t - ~. .. .- 'I - - - -I - -. - - - - -0 I I I I - - - - 1 .. 1- o ". 5 6 8 9 , I 10 11 12 13 14 15 16 17 18 19 20 Time (hours) 7 III Runoff ~ Project: Bluff Creek Townhomes Camp.By: M.A. Schol STORM SEWER DESIGN TABULATION FREQUENCY STORM 10 YEARS Date: Proj.No. 10/13/2005 DRAINAGE TO MAIN POND CB-S3 CBMH-52 0,68 4.7 3,196 3.196 15 0.6 1.918 1 4.536 29 0.107 12 3.562 921.30 921.30 916.80 916.51 CBMH-S2 CBMH-51 1.06 4.7 4,982 8.178 15 0.6 4.907 0,8 5.317 280 0.878 18 9.392 921.30 919.00 916.01 913.77 CBMH-51 STMH-50 2.37 4.7 11.139 19.317 15 0.6 11.590 10.63 19.380 220 0.189 18 34 .236 919,00 894.00 913.77 890.38 STMH-SO FE5-1 0 4.7 0 19,317 15 0,6 11,590 0.4 4.554 220 0.805 24 14.303 894.00 NA 889.88 889,00 Shutropp-l Dyr Ryan Engineering, Inc. OVER CAP D OF COVER D OF COVER (UNDER) UPSTREAM DWNSTREM 1 .64393846 4.48523949 22,6458842 2.71240988 3.30 3.54 3.48 1.82 3.59 3.48 1.87 -891.30 10/13/2005 I --~ 1- "><"onl "><,'onl "_~ - ~'"O'''''_ - - - - LYMAN -BLVD. -.:'"""'::: -- --- soni~ory - - _,..,.!!!9n~ - _ _ _ _ _ _ ~roM- _ _ _ _ __ Yop=924.79 Do:l TNH=928.52 inv=911.45 ..- / 1,----------- / I I I ' I / ~ I I I I I I I i I i I I I I i I I I I i I I I I i I I I I I I I i I i I I I B I ",1 '- IJ[' * I r f+- I I /l'- I I I / I I I I ., I I I 1 924.15 w.o~ , I 924.65 ed e of bituminous 924..36 traffIc SIgn __ ._ ~_ - ~fl0i9n-- o /... ~ riser92.18 MNDOT yRANS. R/W PLAT NO.10-19 1 ......... ------ \Otroffic sign -......... "J \ ~J,90 ~ found monument ~ ~ ~2J.B5 - - r-;-;- - - , I \ ~ \ \ ) qroffic sign set iron mon \ '-. -3~---__ . \ I \ '-. ............... \... -- =t- Ji~~, e'-(o ~\ 'VQ\Qe - \1 1\ ~ -1-' 0, -5lgn \ I ;;\/ ~11\ ;;<1 k --......- -- --... ~ ;:- \. ~ " . BW 904 \ ~a9.4 I TW 903 '- '~ .aw ~ .\- '-l.r.w 960 "'-1B~l::(J ........ ......... -- --............ ~.......... """'- ""9;-.....~" <tJ: of..... " :::::....... O'~II,,~~............ .. I a ~../;~ SIL TIT~E I ona :'::::,.. " --....., ......... 6' HIGH ~ \ xaa6,' RET. WALLS ':::..:.. " ,,' ~ ~ J~':--"', ~......... BLUFF OVERLAY DISTRICT "-.-.,........... aa LINE PER CITY DEMARCATION ........" "- OUTLOT 8 ,~':':" I I I I I I I I I I I I I \ I I \ I I \ I I \ I / ) I \ \ / I \ I / "- I ~ '" <.i l;j ~ '" '" Z ~ ~ ~ /f- (" 40' WETLAND SETBACK 20' WETLAND BUFFER ,. '" -\- D EDGE WETLAND SOUTH UNE OF THE NORTHERL Y 73000 FEU OF THE SW 1/4 SEe. 24 PROPOSED STORM SEWER )( I o' I 50' I 100' I 150'