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HomeMy WebLinkAbout2016-05-23 Sunde Engineering Stormwater Management Calculations Kwik Trip #111 Oak Park Heights, MN Stormwater Management Calculations 05/23/16 Sunde Engineering, PLIC. SUNDE ENGINEERING, PLLC. 10830 Nesbitt Avenue South Bloomington,MN 55437-3100 Phone:(952)881-3344 Fax:(952)881-1913 Kwik Trip#111 05/23/16 Oak Park Heights, MN NM Narrative Stormwater management has been developed in accordance with the rules/regulations of the City of Oak Park Heights, Brown's Creek Watershed District and the MPCA NDPES permit. An existing regional pond will provide the required water quality treatment and rate control. The proposed Kwik Trip is a fueling station and therefore is exempt from infiltration requirements. Existing soils on site are type'B' soils. The proposed stormwater management plan consists of a series of catchbasins with HDPE and PVC storm sewer pipes that drain to a proposed stormwater rate control pond. The site discharges to storm sewer within the right-of-way in the northeast corner of the site and the southwest corner of the site. All site discharge drains to the regional pond. Pipes and ditches on the Kwik Trip have been sized to pass the 10-yr storm event. The site's hydrology was modeled using HydroCAD software,which utilizes the TR-55 methodology. Existing Conditions Area Total Impervious Pervious Ex 128639 0 128639 Total 128639 0 128639 Stormwater Management Calculations Kwik Trip#111 05/23/16 Oak Park Heights,MN NM Proposed Conditions Total Site Area = 128,638 sf Total Proposed Impervious = 82,162 sf(63.9%) Total Proposed Pervious = 46,476 sf(36.1%) Area Total Impervious Pervious 1 28257 25304 2953 2 9776 9776 0 3 5608 5420 188 4 18095 17458 637 5 10142 10142 0 6 4800 4800 0 7 1200 1200 0 8 16390 5472 10918 9 1422 0 1422 10 6337 0 6337 11 2308 2308 0 12 3955 282 3673 13 18492 0 18492 14 1856 0 1856 TOTAL 128638 82162 46476 *See attached HydroCAD output for more details. 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Routing Diagram for KT Oak Park Heights Prepared by Sunde Engineering, PLLC., Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC KT Oak Park Heights Type II 24-hr 10-YR Rainfall=4.17" Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC Page 3 Time span=5.00-20.00 hrs, dt=0.05 hrs, 301 points Runoff by SCS TR-20 method, UH=SCS, Weighted-CN Reach routing by Dyn-Stor-Ind method - Pond routing by Dyn-Stor-Ind method Subcatchment1S: Runoff Area=28,257 sf 89.55% Impervious Runoff Depth>3.27" Tc=6.0 min CN=94 Runoff=3.55 cfs 7,700 cf Subcatchment2S: Runoff Area=9,776 sf 100.00% Impervious Runoff Depth>3.62" Tc=6.0 min CN=98 Runoff=1.29 cfs 2,950 cf Subcatchment3S: Runoff Area=5,608 sf 96.65% Impervious Runoff Depth>3.54" Tc=6.0 min CN=97 Runoff=0.73 cfs 1,656 cf Subcatchment4S: Runoff Area=18,095 sf 96.48% Impervious Runoff Depth>3.54" Tc=6.0 min CN=97 Runoff=2.37 cfs 5,343 cf Subcatchment5S: Runoff Area=10,142 sf 100.00% Impervious Runoff Depth>3.62" Tc=6.0 min CN=98 Runoff=1.34 cfs 3,061 cf Subcatchment6S: Runoff Area=4,800 sf 100.00% Impervious Runoff Depth>3.62" Tc=6.0 min CN=98 Runoff=0.63 cfs 1,449 cf Subcatchment7S: Runoff Area=1,200 sf 100.00% Impervious Runoff Depth>3.62" Tc=6.0 min CN=98 Runoff=0.16 cfs 362 cf Subcatchment8S: OFFSITE Runoff Area=16,365 sf 33.28% Impervious Runoff Depth>1.50" Tc=6.0 min CN=73 Runoff=1.08 cfs 2,050 cf Subcatchment9S: Runoff Area=1,422 sf 0.00% Impervious Runoff Depth>0.80" Tc=6.0 min CN=61 Runoff=0.05 cfs 94 cf Subcatchment10S: Runoff Area=6,337 sf 0.00% Impervious Runoff Depth>0.80" Tc=6.0 min CN=61 Runoff=0.21 cfs 420 cf Subcatchment 11S:OFFSITE Runoff Area=2,308 sf 100.00% Impervious Runoff Depth>3.62" Tc=6.0 min CN=98 Runoff=0.31 cfs 697 cf Subcatchment12S:OFFSITE Runoff Area=3,955 sf 7.13% Impervious Runoff Depth>0.95" Tc=6.0 min CN=64 Runoff=0.16 cfs 314 cf Subcatchment13S: Runoff Area=18,492 sf 0.00% Impervious Runoff Depth>0.80" Tc=6.0 min CN=61 Runoff=0.62 cfs 1,226 cf Subcatchmentl4S: Runoff Area=1,856 sf 0.00% Impervious Runoff Depth>0.80" Tc=6.0 min CN=61 Runoff=0.06 cfs 123 cf Pond 2P:TO MH#1 Peak EIev=938.62' Storage=634 cf Inflow=4.42 cfs 23,809 cf 12.0" Round Culvert n=0.012 L=47.0' S=0.0030'/' Outflow=4.02 cfs 23,797 cf Pond 4P: Peak EIev=938.98' Storage=1,455 cf Inflow=4.22 cfs 18,801 cf 12.0" Round Culvert n=0.012 L=65.0' S=0.0031 '/' Outflow=2.33 cfs 18,783 cf KT Oak Park Heights Type II 24-hr 10-YR Rainfall=4.17" Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC Page 4 Pond 6P: Peak Elev=938.71' Storage=4,500 cf Inflow=3.78 cfs 10,074 cf 12.0" Round Culvert n=0.012 L=71.0' S=0.0030'P Outflow=1.71 cfs 9,558 cf Pond 8P: Peak Elev=938.78' Storage=969 cf Inflow=2.37 cfs 5,343 cf 12.0" Round Culvert n=0.012 L=97.0' S=0.0030'P Outflow=1.68 cfs 5,303 cf Pond 10P: Peak Elev=938.64' Inflow=0.73 cfs 1,656 cf 12.0" Round Culvert n=0.012 L=202.0' S=0.0030'P Outflow=0.73 cfs 1,656 cf Link 1 L:TOTAL SITE DRAINAGE Inflow=5.50 cfs 26,858 cf Primary=5.50 cfs 26,858 cf Total Runoff Area= 128,613 sf Runoff Volume= 27,445 cf Average Runoff Depth = 2.56" 36.14% Pervious=46,476 sf 63.86% Impervious = 82,137 sf KT Oak Park Heights Type 1124-hr 10-YR Rainfall=4.17" Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC Page 5 Summary for Subcatchment 1S: Runoff = 3.55 cfs @ 11.96 hrs, Volume= 7,700 cf, Depth> 3.27" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17" Area (sf) CN Description 25,304 98 KT Oak Park Heights Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC Page 2 Pipe Listing (selected nodes) Line# Node In-Invert Out-Invert Length Slope n DiamnWidth Height Inside-Fill Number (feet) (feet) (feet) (ft/ft) (inches) (inches) (inches) 1 2P 936.64 936.50 47.0 0.0030 0.012 12.0 0.0 0.0 2 4P 937.10 936.90 65.0 0.0031 0.012 12.0 0.0 0.0 3 6P 937.58 937.37 71.0 0.0030 0.012 12.0 0.0 0.0 4 8P 937.87 937.58 97.0 0.0030 0.012 12.0 0.0 0.0 5 10P 937.25 936.64 202.0 0.0030 0.012 12.0 0.0 0.0 KT Oak Park Heights Type 1124-hr 10-YR Rainfall=4.17" Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC Page 6 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Assumed Summary for Subcatchment 4S: Runoff = 2.37 cfs @ 11.96 hrs, Volume= 5,343 cf, Depth> 3.54" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17" Area (sf) CN Description 17,458 98 637 61 18,095 97 Weighted Average 637 3.52% Pervious Area 17,458 96.48% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Assumed Summary for Subcatchment 5S: Runoff = 1.34 cfs @ 11.96 hrs, Volume= 3,061 cf, Depth> 3.62" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17" Area (sf) CN Description 10,142 98 0 61 10,142 98 Weighted Average 10,142 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Assumed Summary for Subcatchment 6S: Runoff = 0.63 cfs @ 11.96 hrs, Volume= 1,449 cf, Depth> 3.62" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17" KT Oak Park Heights Type 1124-hr 10-YR Rainfall=4.17" Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC Page 7 Area (sf) CN Description * 4,800 98 * 0 61 4,800 98 Weighted Average 4,800 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry,Assumed Summary for Subcatchment 7S: Runoff = 0.16 cfs @ 11.96 hrs, Volume= 362 cf, Depth> 3.62" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17" Area (sf) CN Description * 1,200 98 * 0 61 1,200 98 Weighted Average 1,200 100.00% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry,Assumed Summary for Subcatchment 8S: OFFSITE Runoff = 1.08 cfs @ 11.98 hrs, Volume= 2,050 cf, Depth> 1.50" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17" Area (sf) CN Description * 5,447 98 * 10,918 61 16,365 73 Weighted Average 10,918 66.72% Pervious Area 5,447 33.28% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Assumed KT Oak Park Heights Type 1124-hr 10-YR Rainfall=4.17" Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC Page 8 Summary for Subcatchment 9S: Runoff = 0.05 cfs @ 11.99 hrs, Volume= 94 cf, Depth> 0.80" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17" Area (sf) CN Description * 0 98 * 1,422 61 1,422 61 Weighted Average 1,422 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Assumed Summary for Subcatchment 10S: Runoff = 0.21 cfs @ 11.99 hrs, Volume= 420 cf, Depth> 0.80" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17" Area (sf) CN Description * 0 98 * 6,337 61 6,337 61 Weighted Average 6,337 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry,Assumed Summary for Subcatchment 11S: OFFSITE Runoff = 0.31 cfs @ 11.96 hrs, Volume= 697 cf, Depth> 3.62" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17' Area (sf) CN Description * 2,308 98 * 0 61 2,308 98 Weighted Average 2,308 100.00% Impervious Area KT Oak Park Heights Type 1124-hr 10-YR Rainfall=4.17" Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC Page 9 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry,Assumed Summary for Subcatchment 12S: OFFSITE Runoff = 0.16 cfs @ 11.98 hrs, Volume= 314 cf, Depth> 0.95" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17" Area (sf) CN Description 282 98 3,673 61 3,955 64 Weighted Average 3,673 92.87% Pervious Area 282 7.13% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry,Assumed Summary for Subcatchment 13S: Runoff = 0.62 cfs @ 11.99 hrs, Volume= 1,226 cf, Depth> 0.80" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17" Area (sf) CN Description 0 98 18,492 61 18,492 61 Weighted Average 18,492 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry, Assumed Summary for Subcatchment 14S: Runoff = 0.06 cfs @ 11.99 hrs, Volume= 123 cf, Depth> 0.80" Runoff by SCS TR-20 method, UH=SCS, Weighted-CN, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Type II 24-hr 10-YR Rainfall=4.17" • KT Oak Park Heights Type 1124-hr 10-YR Rainfall=4.17" Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC Page 10 Area (sf) CN Description 0 98 1,856 61 1,856 61 Weighted Average 1,856 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 6.0 Direct Entry,Assumed Summary for Pond 2P: TO MH #1 Inflow Area = 105,985 sf, 69.92% Impervious, Inflow Depth > 2.70" for 10-YR event Inflow = 4.42 cfs @ 11.96 hrs, Volume= 23,809 cf Outflow = 4.02 cfs @ 12.01 hrs, Volume= 23,797 cf, Atten= 9%, Lag= 3.1 min Primary = 4.02 cfs @ 12.01 hrs, Volume= 23,797 cf Routing by Dyn-Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 938.62' @ 12.01 hrs Surf.Area= 553 sf Storage=634 cf Plug-Flow detention time= 1.8 min calculated for 23,796 cf(100% of inflow) Center-of-Mass det. time= 1.5 min ( 773.7-772.1 ) Volume Invert Avail.Storage Storage Description #1 936.64' 2,073 cf Custom Stage Data (Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 936.64 0 0 0 937.00 173 31 31 938.00 426 300 331 939.00 630 528 859 940.00 1,798 1,214 2,073 Device Routing Invert Outlet Devices #1 Primary 936.64' 12.0" Round Culvert L=47.0' Ke= 0.500 Inlet/Outlet Invert= 936.64' /936.50' S= 0.0030 '/' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf Primary OutFlow Max=3.98 cfs @ 12.01 hrs HW=938.60' TW=0.00' (Dynamic Tailwater) L1=Culvert (Barrel Controls 3.98 cfs @ 5.07 fps) Summary for Pond 4P: Inflow Area = 84,264 sf, 69.90% Impervious, Inflow Depth > 2.68" for 10-YR event Inflow = 4.22 cfs @ 11.96 hrs, Volume= 18,801 cf Outflow = 2.33 cfs @ 12.33 hrs, Volume= 18,783 cf, Atten=45%, Lag= 22.3 min Primary = 2.33 cfs @ 12.33 hrs, Volume= 18,783 cf Routing by Dyn-Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs KT Oak Park Heights Type 1124-hr 10-YR Rainfall=4.17" Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 sin 02350 ©2016 HydroCAD Software Solutions LLC Page 11 Peak Elev= 938.98' @ 12.06 hrs Surf.Area= 1,441 sf Storage= 1,455 cf Plug-Flow detention time= 4.1 min calculated for 18,719 cf(100% of inflow) Center-of-Mass det. time= 3.6 min ( 780.7-777.0 ) Volume Invert Avail.Storage Storage Description #1 937.10' 3,915 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 937.10 0 0 0 938.00 795 358 358 939.00 1,453 1,124 1,482 940.00 3,414 2,434 3,915 Device Routing Invert Outlet Devices #1 Primary 937.10' 12.0" Round Culvert L= 65.0' Ke= 0.500 Inlet/Outlet Invert= 937.10'/936.90' S= 0.0031 '/' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf Primary OutFlow Max=2.38 cfs @ 12.33 hrs HW=938.33' TW=937.88' (Dynamic Tailwater) 4-1=Culvert (Outlet Controls 2.38 cfs @ 3.15 fps) Summary for Pond 6P: Inflow Area = 49,785 sf, 57.85% Impervious, Inflow Depth > 2.43" for 10-YR event Inflow = 3.78 cfs @ 11.99 hrs, Volume= 10,074 cf Outflow = 1.71 cfs @ 12.32 hrs, Volume= 9,558 cf, Atten= 55%, Lag=20.0 min Primary = 1.71 cfs @ 12.32 hrs, Volume= 9,558 cf Routing by Dyn-Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 938.71' @ 12.22 hrs Surf.Area=4,740 sf Storage=4,500 cf Plug-Flow detention time= 73.7 min calculated for 9,556 cf(95% of inflow) Center-of-Mass det. time= 53.4 min ( 809.0-755.6 ) Volume Invert Avail.Storage Storage Description #1 937.58' 18,946 cf Custom Stage Data(Prismatic)Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 937.58 3,164 0 0 938.00 3,802 1,463 1,463 939.00 5,121 4,462 5,924 940.00 6,497 5,809 11,733 941.00 7,929 7,213 18,946 Device Routing Invert Outlet Devices #1 Primary 937.58' 12.0" Round Culvert L= 71.0' Ke= 0.500 Inlet/Outlet Invert= 937.58' /937.37' S= 0.0030 '/' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf KT Oak Park Heights Type 1124-hr 10-YR Rainfall=4.17" Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC Page 12 Primary OutFlow Max=1.77 cfs @ 12.32 hrs HW=938.65' TW=938.34' (Dynamic Tailwater) 4-1=Culvert (Outlet Controls 1.77 cfs @ 2.61 fps) Summary for Pond 8P: Inflow Area= 18,095 sf, 96.48% Impervious, Inflow Depth > 3.54" for 10-YR event Inflow = 2.37 cfs @ 11.96 hrs, Volume= 5,343 cf Outflow = 1.68 cfs @ 12.01 hrs, Volume= 5,303 cf, Atten=29%, Lag= 2.6 min Primary = 1.68 cfs @ 12.01 hrs, Volume= 5,303 cf Routing by Dyn-Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 938.78' @ 12.05 hrs Surf.Area= 1,426 sf Storage= 969 cf Plug-Flow detention time= 22.4 min calculated for 5,301 cf(99% of inflow) Center-of-Mass det. time= 18.7 min ( 753.4-734.7 ) Volume Invert Avail.Storage Storage Description #1 937.87' 1,297 cf Custom Stage Data (Prismatic)Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 937.87 0 0 0 938.00 904 59 59 939.00 1,572 1,238 1,297 Device Routing Invert Outlet Devices #1 Primary 937.87' 12.0" Round Culvert L= 97.0' Ke= 0.500 Inlet/Outlet Invert= 937.87' /937.58' S= 0.0030 '/' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf Primary OutFlow Max=1.39 cfs @ 12.01 hrs HW=938.76' TW=938.41' (Dynamic Tailwater) L1=Culvert (Outlet Controls 1.39 cfs @ 2.49 fps) Summary for Pond 10P: Inflow Area = 5,608 sf, 96.65% Impervious, Inflow Depth > 3.54" for 10-YR event Inflow = 0.73 cfs @ 11.96 hrs, Volume= 1,656 cf Outflow = 0.73 cfs @ 11.96 hrs, Volume= 1,656 cf, Atten= 0%, Lag= 0.0 min Primary = 0.73 cfs @ 11.96 hrs, Volume= 1,656 cf Routing by Dyn-Stor-Ind method, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs Peak Elev= 938.64' @ 12.06 hrs Device Routing Invert Outlet Devices #1 Primary 937.25' 12.0" Round Culvert L=202.0' Ke= 0.500 Inlet/Outlet Invert= 937.25' /936.64' S= 0.0030 '/' Cc= 0.900 n= 0.012, Flow Area= 0.79 sf Primary OutFlow Max=0.00 cfs @ 11.96 hrs HW=938.34' TW=938.49' (Dynamic Tailwater) 4-1=Culvert ( Controls 0.00 cfs) KT Oak Park Heights Type 1124-hr 10-YR Rainfall=4.17" Prepared by Sunde Engineering, PLLC. Printed 5/23/2016 HydroCAD®10.00-17 s/n 02350 ©2016 HydroCAD Software Solutions LLC Page 13 Summary for Link 1L: TOTAL SITE DRAINAGE Inflow Area= 128,613 sf, 63.86% Impervious, Inflow Depth > 2.51" for 10-YR event Inflow = 5.50 cfs @ 11.99 hrs, Volume= 26,858 cf Primary = 5.50 cfs @ 11.99 hrs, Volume= 26,858 cf, Atten= 0%, Lag= 0.0 min Primary outflow= Inflow, Time Span= 5.00-20.00 hrs, dt= 0.05 hrs i S Soil Map—Washington County,Minnesota (KT Oak Park Heights) 511540 511570 511600 511630 511660 511690 511720 45°2'3'N , : 45°2'3'N m2R y v i*# *i 8 0 , I" o o % �8(6 St $ J° cr i ':' 4v 1 O 0 I, *: .-.---,, # ` N 45°1'54'N 45°1'54'N 511540 511570 511600 511630 511660 511690 511720 3 3 Map Sole:1:1,370 if printed on A portrait(8.5"x 11")sheet Meters ° a N 0 20 40 80 120 nFeet /V 0 50 100 200 300 Map projection:Web Merotrlr Corner coordinates:W( 84 Edge tics:UTM Zone 15N WC,584 USDA Natural Resources Web Soil Survey 5/9/2016 Conservation Service National Cooperative Soil Survey Page 1 of 3 Soil Map—Washington County,Minnesota (KT Oak Park Heights) MAP LEGEND MAP INFORMATION Area of Interest(A01) A Spoil Area The soil surveys that comprise your AOI were mapped at 1:15,800. 0 Area of Interest(AOI) Stony spot Warning:Soil Map may not be valid at this scale. Soils al Very Stony Spot U soil Map Unit Polygons Enlargement of maps beyond the scale of mapping can cause Wet Spot misunderstanding of the detail of mapping and accuracy of soil line Soil Map Unit Lines placement.The maps do not show the small areas of contrasting 5 Other soils that could have been shown at a more detailed scale. • • Soil Map Unit Points Special Line Features Special Point Features Please rely on the bar scale on each map sheet for map Water Features to Blowout measurements. Streams and Canals Borrow Pit Source of Map: Natural Resources Conservation Service Transportation Web Soil Survey URL: http://websoilsurvey.nrcs.usda.gov At Clay Spot 4-0+ Rails Coordinate System: Web Mercator(EPSG:3857) (y Closed Depression N Interstate Highways Maps from the Web Soil Survey are based on the Web Mercator • Gravel Pit US Routes projection,which preserves direction and shape but distorts distance and area.A projection that preserves area,such as the Gravelly Spot Major Roads Albers equal-area conic projection,should be used if more accurate Landfill Local Roads calculations of distance or area are required. co Lava Flow Background This product is generated from the USDA-NRCS certified data as of 41,„ Marsh or swamp I. Aerial Photography the version date(s)listed below. Soil Survey Area: Washington County,Minnesota • Mine or Quarry Survey Area Data: Version 10,Sep 18,2015 Miscellaneous Water Soil map units are labeled(as space allows)for map scales 1:50,000 O Perennial Water or larger. v Rock Outcrop Date(s)aerial images were photographed: Mar 16,2012—Apr26, 2012 .4., Saline Spot The orthophoto or other base map on which the soil lines were Sandy Spot compiled and digitized probably differs from the background Severely Eroded Spot imagery displayed on these maps.As a result,some minor shifting of map unit boundaries may be evident. Sinkhole p, Slide or Slip • Sonic Spot USDA Natural Resources Web Soil Survey 5/9/2016 WWII Conservation Service National Cooperative Soil Survey Page 2 of 3 Soil Map—Washington County,Minnesota KT Oak Park Heights Map Unit Legend Washington County,Minnesota(MN163) Map Unit Symbol Map Unit Name Acres in AO1 Percent of AOI 49 Antigo silt loam,0 to 2 percent 4.1 100.0% slopes Totals for Area of Interest 4.1 100.0% USDA Natural Resources Web Soil Survey 5/9/2016 Conservation Service National Cooperative Soil Survey Page 3 of 3