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HomeMy WebLinkAbout20140715 Stormwater Report - Stormwater Report - 500 GREAT POND ROAD 7/15/2014 i Subcatchment 2 Detenti n Basin Subcatchment 1 z� �t Subcatchment 3 Design Point Across E3 SubC it Routing Diagram for Pre revision-Watershed—areas Prepared by The Morin-Cameron Group, Inc HydroCAD®10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Pre revision-Watershed areas Prepared by The Morin-Cameron Group, Inc ydroCADO 10.00 s/n 00401 ©2011 H droCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (sq-ft) (subcatchment-gp.rnbQrs) 72,259 80 >75% Grass cover, Good, HSG D (E1, E2, E3) 4,641 96 Gravel surface, HSG D (E1, E2, E3) 22,753 98 Paved parking, HSG D (E1, E2, E3) 9,884 98 Roofs, HSG D (E1, E2, E3) 109,537 86 TOTAL AREA Pre revision-Watershed—areas Prepared by The Morin-Cameron Group, Inc HydroCAD®10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Pape 3 Soil Listing (all nodes) Area Soil Subcatchment (sq-ft) Group Numbers 0 HSG A 0 HSG B 0 HSG C 109,537 HSG D E1, E2, E3 0 Other 109,537 TOTAL AREA Pre revision-Watershed_areas Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 4 Ground Covers (all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground (sq-ft) (sq-ft) (sq-ft) (sq-ft) (sq-ft) (sq-ft) Cover 0 0 0 72,259 0 72,259 >75% Grass cover, Good 0 0 0 22,753 0 22,753 Paved parking 0 0 0 9,884 0 9,884 Roofs 0 0 0 4,641 0 4,641 Gravel surface 0 0 0 109,537 0 109,537 TOTAL AREA Pre revision-Watershed_areas Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 5 Notes Listing (all nodes) Line# Node Notes Number 1 E1 Gravel Areas = Roads and Under Paddle Tennis Courts 2 E2 Gravel Areas = Roads and Under Paddle Tennis Courts 3 E3 Gravel Areas = Roads and Under Paddle Tennis Courts Pre revision-Watershed_areas Type 111 24-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 H droCAD Software Solutions LLC Page 6 Time span=0.00-24.00 hrs, dt=0.10 hrs, 241 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment E1: Subcatchment 1 Runoff Area=18,959 sf 48.70% Impervious Runoff Depth>1.53" Flow Length=282' Tc=6.0 min CN=90 Runoff=0.73 cfs 2,417 cf Subcatchment E2: Subcatchment 2 Runoff Area=15,057 sf 45.33% Impervious Runoff Depth>1.53" Flow Length=289' Tc=6.0 min CN=90 Runoff=0.58 cfs 1,920 cf Subcatchment E3: Subcatchment 3 Runoff Area=75,521 sf 21.95% Impervious Runoff Depth>1.11" Flow Length=545' Tc=10.6 min CN=84 Runoff=1.78 cfs 7,011 cf Reach DP: Design Point Inflow=2.74 cfs 11,315 cf Outflow=2.74 cfs 11,315 cf Reach TC: Across E3 Avg. Flow Depth=0.08' Max Vet=0.50 fps Inflow=1.17 cfs 4,323 cf n=0.150 L=117.0' S=0.1069'/' Capacity=49.86 cfs Outflow=1.04 cfs 4,304 cf Pond D1: Detention Basin Peak Elev=144.59' Storage=173 cf Inflow=1.31 cfs 4,337 cf Primary=1.17 cfs 4,323 cf Secondary=0.00 cfs 0 cf Outflow=1.17 cfs 4,323 cf Total Runoff Area= 109,537 sf Runoff Volume= 11,349 cf Average Runoff Depth = 1.24" 70.20% Pervious= 76,900 sf 29.80% Impervious =32,637 sf Pre revision-Watershed_areas Type 111 24-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 7 Summary for Subcatchment E1: Subcatchment 1 Runoff = 0.73 cfs @ 12.10 hrs, Volume= 2,417 cf, Depth> 1.53" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 1-Year Rainfall=2.50" Area (sf) CN Description 7,409 98 Paved parking, HSG D 1,859 96 Gravel surface, HSG D 1,824 98 Roofs, HSG D 7,867 80 >75% Grass cover, Good, HSG D 18,959 90 Weighted Average 9,726 51.30% Pervious Area 9,233 48.70% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0600 1.83 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.1 25 0.2525 3.52 Shallow Concentrated Flow, Shallow Concentrated-G Woods/ra Short Grass Pasture Kv= 7.0 fps 0.3 57 0.0185 2.76 Shallow Concentrated Flow, Shallow Concentrated-Grvl Road Paved Kv= 20.3 fps 0.2 12 0.0323 1.26 Shallow Concentrated Flow, Shallow Concentrated-Grass Short Grass Pasture Kv= 7.0 fps 0.9 138 0.0144 2.44 Shallow Concentrated Flow, Shallow Concentrated- Pavement Paved Kv= 20.3 fps 4.0 Direct Entry, Direct Entry(Tc Min = 6 Min.) 6.0 282 Total Summary for Subcatchment E2: Subcatchment 2 Runoff = 0.58 cfs @ 12.10 hrs, Volume= 1,920 cf, Depth> 1.53" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 1-Year Rainfall=2.50" Area (sf) CN Description 1,167 98 Paved parking, HSG D 1,284 96 Gravel surface, HSG D 5,659 98 Roofs, HSG D 6,947 80 >75% Grass cover, Good, HSG D 15,057 90 Weighted Average 8,231 54.67% Pervious Area 6,826 45.33% Impervious Area Pre revision-Watershed_areas Type 111 24-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 8 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.4 50 0.0800 2.05 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.5 47 0.0815 1.43 Shallow Concentrated Flow, Shallow Concentrated-Grass Woodland Kv= 5.0 fps 0.0 9 0.0370 3.90 Shallow Concentrated Flow, Shallow Concentrated-Grvl Road Paved Kv= 20.3 fps 0.2 16 0.0316 1.24 Shallow Concentrated Flow, Shallow Concentrated-Grass Short Grass Pasture Kv= 7.0 fps 0.5 123 0.0689 4.23 Shallow Concentrated Flow, Shallow Concentrated-Crsh Stone Unpaved Kv= 16.1 fps 0.4 44 0.0774 1.95 Shallow Concentrated Flow, Shallow Concentrated-Grass Short Grass Pasture Kv= 7.0 fps 4.0 Direct Entry, Direct Ent (Tc Min = 6 Min.) 6.0 289 Total Summary for Subcatchment El Subcatchment 3 Runoff = 1.78 cfs @ 12.17 hrs, Volume= 7,011 cf, Depth> 1.11" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 1-Year Rainfall=2.50" Area (sf) CN Description 2,401 98 Roofs, HSG D 14,177 98 Paved parking, HSG D 1,498 96 Gravel surface, HSG D 57,445 80 >75% Grass cover, Good, HSG D 75,521 84 Weighted Average 58,943 78.05% Pervious Area 16,578 21.95% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 50 0.0560 0.10 Sheet Flow, Sheet Flow-Woods Woods: Light underbrush n= 0.400 P2= 3.10" 0.6 124 0.5600 3.74 Shallow Concentrated Flow, Shallow Concentrated-Woods Woodland Kv= 5.0 fps 0.1 29 0.0490 4.49 Shallow Concentrated Flow, Shallow Concentrated-Gravel Roa Paved Kv= 20.3 fps 0.0 8 0.1700 6.64 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.8 119 0.0235 2.47 Shallow Concentrated Flow, Shallow Concentrated-Gravel Unpaved Kv= 16.1 fps 0.8 215 0.0880 4.78 Shallow Concentrated Flow, Shallow Concentrated-Grass Unpaved Kv= 16.1 fps 10.6 545 Total E Pre revision-Watershed_areas Type 111 24-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCAD®10 00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 9 Summary for Reach DP: Design Point Inflow Area = 109,537 sf, 29.80% Impervious, Inflow Depth > 1.24" for 1-Year event Inflow = 2.74 cfs @ 12.20 hrs, Volume= 11,315 cf Outflow = 2.74 cfs @ 12.20 hrs, Volume= 11,315 cf, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Summary for Reach TC: Across E3 Inflow Area = 34,016 sf, 47.21% Impervious, Inflow Depth > 1.53" for 1-Year event Inflow = 1.17 cfs @ 12.14 hrs, Volume= 4,323 cf Outflow = 1.04 cfs @ 12.26 hrs, Volume= 4,304 cf, Atten= 11%, Lag= 7.5 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Max. Velocity= 0.50 fps, Min. Travel Time= 3.9 min Avg. Velocity = 0.17 fps, Avg. Travel Time= 11.3 min Peak Storage= 257 cf @ 12.19 hrs Average Depth at Peak Storage= 0.08' Bank-Full Depth= 0.50' Flow Area= 35.0 sf, Capacity= 49.86 cfs 20.00' x 0.50' deep channel, n= 0.150 Sheet flow over Short Grass Side Slope Z-value= 100.0 '/' Top Width= 120.00' Length 117.0' Slope= 0.1069 '/' Inlet Invert= 144.22', Outlet Invert= 131.71' Summary for Pond D1: Detention Basin Inflow Area = 34,016 sf, 47.21% Impervious, Inflow Depth > 1.53" for 1-Year event Inflow = 1.31 cfs @ 12.10 hrs, Volume= 4,337 cf Outflow = 1.17 cfs @ 12.14 hrs, Volume= 4,323 cf, Atten= 11%, Lag= 2.3 min Primary = 1.17 cfs @ 12.14 hrs, Volume= 4,323 cf Secondary 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Peak Elev= 144.59' @ 12.14 hrs Surf.Area= 662 sf Storage= 173 cf Plug-Flow detention time= 5.0 min calculated for 4,305 cf(99% of inflow) Center-of-Mass det. time= 3.1 min ( 819.5 - 816.4 ) Pre revision-Watershed_areas Type 111 24-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 10 Volume Invert Avail.Storage Storage Description #1 144.10' 3,344 cf Detention Basin (Prismatic) Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 144.10 0 0 0 144.50 583 117 117 145.00 1,018 400 517 145.20 1,500 252 769 145.30 50,000 2,575 3,344 Device Routing Invert Outlet Devices #1 Primary 144.22' 2.0' long x 2.0' 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 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 #2 Secondary 144.91' 10.0' long x 4.0' 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 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=1.11 cfs @ 12.14 hrs HW=144.58' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 1.11 cfs @ 1.55 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=144.10' (Free Discharge) L2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Pre revision-Watershed_areas Type 111 24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page-1 1 Time span=0.00-24.00 hrs, dt=0.10 hrs, 241 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment E1: Subcatchment 1 Runoff Area=18,959 sf 48.70% Impervious Runoff Depth>2.08" Flow Length=282' Tc=6.0 min CN=90 Runoff=0.98 cfs 3,278 cf Subcatchment E2: Subcatchment 2 Runoff Area=15,057 sf 45.33% Impervious Runoff Depth>2.08" Flow Length=289' Tc=6.0 min CN=90 Runoff=0.78 cfs 2,604 cf Subcatchment E3: Subcatchment 3 Runoff Area=75,521 sf 21.95% Impervious Runoff Depth>1.60" Flow Length=545' Tc=10.6 min CN=84 Runoff=2.57 cfs 10,047 cf Reach DP: Design Point Inflow=3.88 cfs 15,892 cf Outflow=3.88 cfs 15,892 cf Reach TC: Across E3 Avg. Flow Depth=0.09' Max Vet=0.55 fps Inflow=1.57 cfs 5,867 cf n=0.150 L=117.0' S=0.1069 7' Capacity=49.86 cfs Outflow=1.41 cfs 5,845 cf Pond D1: Detention Basin Peak Elev=144.67' Storage=228 cf Inflow=1.76 cfs 5,882 cf Primary=1.57 cfs 5,867 cf Secondary=0.00 cfs 0 cf Outflow=1.57 cfs 5,867 cf Total Runoff Area= 109,537 sf Runoff Volume= 15,929 cf Average Runoff Depth = 1.75" 70.20%Pervious=76,900 sf 29.80% Impervious=32,637 sf Pre revision-Watershed_areas Type 111 24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 12 Summary for Subcatchment E1: Subcatchment 1 Runoff = 0.98 cfs @ 12.10 hrs, Volume= 3,278 cf, Depth> 2.08" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 2-Year Rainfall=3.10" Area (sf) CN Description 7,409 98 Paved parking, HSG D 1,859 96 Gravel surface, HSG D 1,824 98 Roofs, HSG D 7,867 80 >75% Grass cover, Good, HSG D 18,959 90 Weighted Average 9,726 51.30% Pervious Area 9,233 48.70% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0600 1.83 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.1 25 0.2525, 3.52 Shallow Concentrated Flow, Shallow Concentrated-G Woods/ra Short Grass Pasture Kv= 7.0 fps 0.3 57 0.0185 2.76 Shallow Concentrated Flow, Shallow Concentrated-Grvl Road Paved Kv= 20.3 fps 0.2 12 0.0323 1.26 Shallow Concentrated Flow, Shallow Concentrated-Grass Short Grass Pasture Kv= 7.0 fps 0.9 138 0.0144 2.44 Shallow Concentrated Flow, Shallow Concentrated-Pavement Paved Kv= 20.3 fps 4.0 Direct Entry, Direct Ent (Tc Min = 6 Min.) 6.0 282 Total Summary for Subcatchment E2: Subcatchment 2 Runoff = 0.78 cfs @ 12.10 hrs, Volume= 2,604 cf, Depth> 2.08" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 2-Year Rainfall=3.10" Area (sf) CN Description 1,167 98 Paved parking, HSG D 1,284 96 Gravel surface, HSG D 5,659 98 Roofs, HSG D 6,947 80 >75% Grass cover, Good, HSG D 15,057 90 Weighted Average 8,231 54.67% Pervious Area 6,826 45.33% Impervious Area Pre revision-Watershed_areas Type I1124-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCAD®10 00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 13 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.4 50 0.0800 2.05 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.5 47 0.0815 1.43 Shallow Concentrated Flow, Shallow Concentrated- Grass Woodland Kv= 5.0 fps 0.0 9 0.0370 3.90 Shallow Concentrated Flow, Shallow Concentrated-Grvl Road Paved Kv= 20.3 fps 0.2 16 0.0316 1.24 Shallow Concentrated Flow, Shallow Concentrated- Grass Short Grass Pasture Kv= 7.0 fps 0.5 123 0.0689 4.23 Shallow Concentrated Flow, Shallow Concentrated-Crsh Stone Unpaved Kv= 16.1 fps 0.4 44 0.0774 1.95 Shallow Concentrated Flow, Shallow Concentrated-Grass Short Grass Pasture Kv= 7.0 fps 4.0 Direct Entry, Direct Entry(Tc Min =6 Min.) 6.0 289 Total Summary for Subcatchment El Subcatchment 3 Runoff = 2.57 cfs @ 12.16 hrs, Volume= 10,047 cf, Depth> 1.60" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 2-Year Rainfall=3.10" Area (sf) CN Description 2,401 98 Roofs, HSG D 14,177 98 Paved parking, HSG D 1,498 96 Gravel surface, HSG D 57,445 80 >75% Grass cover, Good, HSG D 75,521 84 Weighted Average 58,943 78.05% Pervious Area 16,578 21.95% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 50 0.0560 0.10 Sheet Flow, Sheet Flow-Woods Woods: Light underbrush n= 0.400 P2= 3.10" 0.6 124 0.5600 3.74 Shallow Concentrated Flow, Shallow Concentrated-Woods Woodland Kv= 5.0 fps 0.1 29 0.0490 4.49 Shallow Concentrated Flow, Shallow Concentrated-Gravel Roa Paved Kv= 20.3 fps 0.0 8 0.1700 6.64 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.8 119 0.0235 2.47 Shallow Concentrated Flow, Shallow Concentrated-Gravel Unpaved Kv= 16.1 fps 0.8 215 0.0880 4.78 Shallow Concentrated Flow, Shallow Concentrated-Grass Unpaved Kv= 16.1 fps 10.6 545 Total Pre revision-Watershed_areas Type Ill 24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 14 Summary for Reach DP: Design Point Inflow Area = 109,537 sf, 29.80% Impervious, Inflow Depth > 1.74" for 2-Year event Inflow = 3.88 cfs @ 12.19 hrs, Volume= 15,892 cf Outflow = 3.88 cfs @ 12.19 hrs, Volume 15,892 cf, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Summary for Reach TC: Across E3 Inflow Area = 34,016 sf, 47.21% Impervious, Inflow Depth > 2.07" for 2-Year event Inflow = 1.57 cfs @ 12.13 hrs, Volume= 5,867 cf Outflow = 1.41 cfs @ 12.25 hrs, Volume= 5,845 cf, Atten= 11%, Lag= 6.7 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Max. Velocity= 0.55 fps, Min. Travel Time= 3.5 min Avg. Velocity= 0.19 fps, Avg. Travel Time= 10.5 min Peak Storage= 318 cf @ 12.19 hrs Average Depth at Peak Storage= 0.09' Bank-Full Depth= 0.50' Flow Area= 35.0 sf, Capacity= 49.86 cfs 20.00' x 0.50' deep channel, n= 0.150 Sheet flow over Short Grass Side Slope Z-value= 100.0 7' Top Width= 120.00' Length= 117.0' Slope= 0.1069 7' Inlet Invert= 144.22', Outlet Invert= 131.71' Summary for Pond D1: Detention Basin Inflow Area = 34,016 sf, 47.21% Impervious, Inflow Depth > 2.08" for 2-Year event Inflow = 1.76 cfs @ 12.10 hrs, Volume= 5,882 cf Outflow = 1.57 cfs @ 12.13 hrs, Volume= 5,867 cf, Atten= 11%, Lag= 2.2 min Primary = 1.57 cfs @ 12.13 hrs, Volume= 5,867 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Peak Elev= 144.67' @ 12.14 hrs SurF.Area= 731 sf Storage= 228 cf Plug-Flow detention time= 4.4 min calculated for 5,843 cf(99% of inflow) Center-of-Mass det. time= 2.9 min ( 810.7- 807.8 ) Pre revision-Watershed-areas Type/1/24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCAD®10 00 sin 00401 ©2011 HydroCAD Software Solutions LLC Page 15 Volume Invert Avail Storage Storage Description #1 144.10' 3,344 cf Detention Basin (Prismatic) Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 144.10 0 0 0 144.50 583 117 117 145.00 1,018 400 517 145.20 1,500 252 769 145.30 50,000 2,575 3,344 Device Routing Invert Outlet Devices #1 Primary 144.22' 2.0' long x 2.0' 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 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 #2 Secondary 144.91' 10.0' long x 4.0' 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 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=1.50 cfs @ 12.13 hrs HW=144.65' (Free Discharge) t-1=Broad-Crested Rectangular Weir (Weir Controls 1.50 cfs @ 1.72 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=144.10' (Free Discharge) L2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Pre revision-Watershed_areas Type 111 24-hr 90-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 16 Time span=0.00-24.00 hrs, dt=0.10 hrs, 241 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment E1: Subcatchment 1 Runoff Area=18,959 sf 48.70% Impervious Runoff Depth>3.39" Flow Length=282' Tc=6.0 min CN=90 Runoff=1.57 cfs 5,362 cf Subcatchment E2: Subcatchment 2 Runoff Area=15,057 sf 45.33% Impervious Runoff Depth>3.39" Flow Length=289' Tc=6.0 min CN=90 Runoff=1.25 cfs 4,259 cf Subcatchment E3: Subcatchment 3 Runoff Area=75,521 sf 21.95% Impervious Runoff Depth>2.81" Flow Length=545' Tc=10.6 min CN=84 Runoff=4.51 cfs 17,701 cf Reach DP: Design Point Inflow=6.66 cfs 27,276 cf Outflow=6.66 cfs 27,276 cf Reach TC: Across E3 Avg. Flow Depth=0.12' Max Vet=0.63 fps Inflow=2.51 cfs 9,604 cf n=0.150 L=117.0' S=0.1069'/' Capacity=49.86 cfs Outflow=2.28 cfs 9,575 cf Pond D1: Detention Basin Peak Elev=144.84' Storage=361 cf Inflow=2.82 cfs 9,621 cf Primary=2.51 cfs 9,604 cf Secondary=0.00 cfs 0 cf Outflow=2.51 cfs 9,604 cf Total Runoff Area= 109,537 sf Runoff Volume=27,322 cf Average Runoff Depth =2.99" 70.20% Pervious = 76,900 sf 29.80% Impervious=32,637 sf Pre revision-Watershed_areas Type 111 24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Paae 17 Summary for Subcatchment E1: Subcatchment 1 Runoff = 1.57 cfs @ 12.10 hrs, Volume= 5,362 cf, Depth> 3.39" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 10-Year Rainfall=4.50" Area (sf) CN Description 7,409 98 Paved parking, HSG D 1,859 96 Gravel surface, HSG D 1,824 98 Roofs, HSG D 7,867 80 >75% Grass cover, Good, HSG D 18,959 90 Weighted Average . 9,726 51.30% Pervious Area 9,233 48.70% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0600 1.83 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.1 25 0.2525 3.52 Shallow Concentrated Flow, Shallow Concentrated-G Woods/ra Short Grass Pasture Kv= 7.0 fps 0.3 57 0.0185 2.76 Shallow Concentrated Flow, Shallow Concentrated-Grvl Road Paved Kv= 20.3 fps 0.2 12 0.0323 1.26 Shallow Concentrated Flow, Shallow Concentrated- Grass Short Grass Pasture Kv= 7.0 fps 0.9 138 0.0144 2.44 Shallow Concentrated Flow, Shallow Concentrated- Pavement Paved Kv= 20.3 fps 4.0 Direct Entry, Direct Entry(Tc Min =6 Min.) 6.0 282 Total Summary for Subcatchment E2: Subcatchment 2 Runoff = 1.25 cfs @ 12.10 hrs, Volume= 4,259 cf, Depth> 3.39" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 10-Year Rainfall=4.50" Area (sf) CN Description 1,167 98 Paved parking, HSG D 1,284 96 Gravel surface, HSG D 5,659 98 Roofs, HSG D 6,947 80 >75% Grass cover, Good, HSG D 15,057 90 Weighted Average 8,231 54.67% Pervious Area 6,826 45.33% Impervious Area Pre revision-Watershed_areas Type 111 24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Pale 18 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.4 50 0.0800 2.05 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.5 47 0.0815 1.43 Shallow Concentrated Flow, Shallow Concentrated-Grass Woodland Kv= 5.0 fps 0.0 9 0.0370 3.90 Shallow Concentrated Flow, Shallow Concentrated-Grvl Road Paved Kv= 20.3 fps 0.2 16 0.0316 1.24 Shallow Concentrated Flow, Shallow Concentrated- Grass Short Grass Pasture Kv= 7.0 fps 0.5 123 0.0689 4.23 Shallow Concentrated Flow, Shallow Concentrated-Crsh Stone Unpaved Kv= 16.1 fps 0.4 44 0.0774 1.95 Shallow Concentrated Flow, Shallow Concentrated- Grass Short Grass Pasture Kv= 7.0 fps 4.0 Direct Entry, Direct Entry(Tc Min =6 Min.) 6.0 289 Total Summary for Subcatchment El Subcatchment 3 Runoff = 4.51 cfs @ 12.15 hrs, Volume= 17,701 cf, Depth> 2.81" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 10-Year Rainfall=4.50" Area (sf) CN Description 2,401 98 Roofs, HSG D 14,177 98 Paved parking, HSG D 1,498 96 Gravel surface, HSG D 57,445 80 >75% Grass cover, Good, HSG D 75,521 84 Weighted Average 58,943 78.05% Pervious Area 16,578 21.95% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 50 0.0560 0.10 Sheet Flow, Sheet Flow-Woods Woods: Light underbrush n= 0.400 P2= 3.10" 0.6 124 0.5600 3.74 Shallow Concentrated Flow, Shallow Concentrated-Woods Woodland Kv= 5.0 fps 0.1 29 0.0490 4.49 Shallow Concentrated Flow, Shallow Concentrated-Gravel Roa Paved Kv= 20.3 fps 0.0 8 0.1700 6.64 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.8 119 0.0235 2.47 Shallow Concentrated Flow, Shallow Concentrated-Gravel Unpaved Kv= 16.1 fps 0.8 215 0.0880 4.78 Shallow Concentrated Flow, Shallow Concentrated-Grass Unpaved Kv= 16.1 fps 10.6 545 Total Pre revision-Watershed_areas Type 111 24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 19 Summary for Reach DP: Design Point Inflow Area 109,537 sf, 29.80% Impervious, Inflow Depth > 2.99" for 10-Year event Inflow = 6.66 cfs @ 12.18 hrs, Volume= 27,276 cf Outflow = 6.66 cfs @ 12.18 hrs, Volume= 27,276 cf, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Summary for Reach TC: Across E3 Inflow Area = 34,016 sf, 47.21% Impervious, Inflow Depth > 3.39" for 10-Year event Inflow = 2.51 cfs @ 12.13 hrs, Volume= 9,604 cf Outflow = 2.28 cfs @ 12.23 hrs, Volume= 9,575 cf, Atten= 9%, Lag= 5.7 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Max. Velocity= 0.63 fps, Min. Travel Time= 3.1 min Avg. Velocity = 0.21 fps, Avg. Travel Time= 9.2 min Peak Storage= 446 cf @ 12.18 hrs Average Depth at Peak Storage= 0.12' Bank-Full Depth= 0.50' Flow Area= 35.0 sf, Capacity=49.86 cfs 20.00' x 0.50' deep channel, n= 0.150 Sheet flow over Short Grass Side Slope Z-value= 100.0 7' Top Width= 120.00' Length= 117.0' Slope= 0.1069 '/' Inlet Invert= 144.22', Outlet Invert= 131.71' Summary for Pond D1: Detention Basin Inflow Area = 34,016 sf, 47.21% Impervious, Inflow Depth > 3.39" for 10-Year event Inflow = 2.82 cfs @ 12.10 hrs, Volume= 9,621 cf Outflow = 2.51 cfs @ 12.13 hrs, Volume= 9,604 cf, Atten= 11%, Lag= 2.2 min Primary = 2.51 cfs @ 12.13 hrs, Volume= 9,604 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Peak Elev= 144.84' @ 12.13 hrs Surf.Area= 875 sf Storage= 361 cf Plug-Flow detention time= 3.7 min calculated for 9,565 cf(99% of inflow) Center-of-Mass det. time= 2.7 min ( 796.7 - 794.0 ) Pre revision-Watershed_areas Type 111 24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 20 Volume Invert Avail.Storage Storage Description #1 144.10' 3,344 cf Detention Basin (Prismatic) Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 144.10 0 0 0 144.50 583 117 117 145.00 1,018 400 517 145.20 1,500 252 769 145.30 50,000 2,575 3,344 Device Routing Invert Outlet Devices #1 Primary 144.22' 2.0' long x 2.0' 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 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 #2 Secondary 144.91' 10.0' long x 4.0' 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 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=2.40 cfs @ 12.13 hrs HW=144.82' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 2.40 cfs @ 2.01 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=144.10' (Free Discharge) L2=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Pre revision-Watershed_areas Type 111 24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 21 Time span=0.00-24.00 hrs, dt=0.10 hrs, 241 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment E1: Subcatchment 1 Runoff Area=18,959 sf 48.70% Impervious Runoff Depth>5.33" Flow Length=282' Tc=6.0 min CN=90 Runoff=2.41 cfs 8,423 cf Subcatchment E2: Subcatchment 2 Runoff Area=15,057 sf 45.33% Impervious Runoff Depth>5.33" Flow Length=289' Tc=6.0 min CN=90 Runoff=1.91 cfs 6,690 cf Subcatchment E3: Subcatchment 3 Runoff Area=75,521 sf 21.95% Impervious Runoff Depth>4.66" Flow Length=545' Tc=10.6 min CN=84 Runoff=7.47 cfs 29,330 cf Reach DP: Design Point Inflow=10.77 cfs 44,386 cf Outflow=10.77 cfs 44,386 cf Reach TC: Across E3 Avg. Flow Depth=0.15' Max Vet=0.72 fps Inflow=4.02 cfs 15,094 cf n=0.150 L=117.0' S=0.1069'/' Capacity=49.86 cfs Outflow=3.56 cfs 15,056 cf Pond D1: Detention Basin Peak Elev=144.99' Storage=510 cf Inflow=4.32 cfs 15,113 cf Primary=3.53 cfs 14,874 cf Secondary=0.50 cfs 219 cf Outflow=4.02 cfs 15,094 cf Total Runoff Area= 109,537 sf Runoff Volume=44,443 cf Average Runoff Depth =4.87" 70.20%Pervious =76,900 sf 29.80%Impervious =32,637 sf Pre revision-Watershed_areas Type 111 24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 22 Summary for Subcatchment E1: Subcatchment 1 Runoff = 2.41 cfs @ 12.10 hrs, Volume= 8,423 cf, Depth> 5.33" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 100-Year Rainfall=6.50" Area (sf) CN Description 7,409 98 Paved parking, HSG D 1,859 96 Gravel surface, HSG D 1,824 98 Roofs, HSG D 7,867 80 >75% Grass cover, Good, HSG D 18,959 90 Weighted Average 9,726 51.30% Pervious Area 9,233 48.70% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0600 1.83 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.1 25 0.2525 3.52 Shallow Concentrated Flow, Shallow Concentrated-G Woods/ra Short Grass Pasture Kv= 7.0 fps 0.3 57 0.0185 2.76 Shallow Concentrated Flow, Shallow Concentrated-Grvl Road Paved Kv= 20.3 fps 0.2 12 0.0323 1.26 Shallow Concentrated Flow, Shallow Concentrated-Grass Short Grass Pasture Kv= 7.0 fps 0.9 138 0.0144 2.44 Shallow Concentrated Flow, Shallow Concentrated- Pavement Paved Kv= 20.3 fps 4.0 Direct Entry, Direct Ent (Tc Min =6 Min.) 6.0 282 Total Summary for Subcatchment E2: Subcatchment 2 Runoff = 1.91 cfs @ 12.10 hrs, Volume= 6,690 cf, Depth> 5.33" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 100-Year Rainfall=6.50" Area (sf) CN Description 1,167 98 Paved parking, HSG D 1,284 96 Gravel surface, HSG D 5,659 98 Roofs, HSG D 6,947 80 >75% Grass cover, Good, HSG D 15,057 90 Weighted Average 8,231 54.67% Pervious Area 6,826 45.33% Impervious Area Pre revision-Watershed_areas Type 111 24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 23 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.4 50 0.0800 2.05 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.5 47 0.0815 1.43 Shallow Concentrated Flow, Shallow Concentrated- Grass Woodland Kv= 5.0 fps 0.0 9 0.0370 3.90 Shallow Concentrated Flow, Shallow Concentrated- Grvl Road Paved Kv= 20.3 fps 0.2 16 0.0316 1.24 Shallow Concentrated Flow, Shallow Concentrated- Grass Short Grass Pasture Kv= 7.0 fps 0.5 123 0.0689 4.23 Shallow Concentrated Flow, Shallow Concentrated-Crsh Stone Unpaved Kv= 16.1 fps 0.4 44 0.0774 1.95 Shallow Concentrated Flow, Shallow Concentrated- Grass Short Grass Pasture Kv= 7.0 fps 4.0 Direct Entry, Direct Entry(Tc Min = 6 Min.) 6.0 289 Total Summary for Subcatchment El Subcatchment 3 Runoff = 7.47 cfs @ 12.15 hrs, Volume= 29,330 cf, Depth> 4.66" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Type III 24-hr 100-Year Rainfall=6.50" Area (sf) CN Description 2,401 98 Roofs, HSG D 14,177 98 Paved parking, HSG D 1,498 96 Gravel surface, HSG D 57,445 80 >75% Grass cover, Good, HSG D 75,521 84 Weighted Average 58,943 78.05% Pervious Area 16,578 21.95% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 50 0.0560 0.10 Sheet Flow, Sheet Flow-Woods Woods: Light underbrush n= 0.400 P2= 3.10" 0.6 124 0.5600 3.74 Shallow Concentrated Flow, Shallow Concentrated-Woods Woodland Kv= 5.0 fps 0.1 29 0.0490 4.49 Shallow Concentrated Flow, Shallow Concentrated-Gravel Roa Paved Kv= 20.3 fps 0.0 8 0.1700 6.64 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.8 119 0.0235 2.47 Shallow Concentrated Flow, Shallow Concentrated-Gravel Unpaved Kv= 16.1 fps 0.8 215 0.0880 4.78 Shallow Concentrated Flow, Shallow Concentrated- Grass Unpaved Kv= 16.1 fps 10.6 545 Total Pre revision-Watershed_areas Type 111 24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 24 Summary for Reach DP: Design Point Inflow Area = 109,537 sf, 29.80% Impervious, Inflow Depth > 4.86" for 100-Year event Inflow = 10.77 cfs @ 12.17 hrs, Volume= 44,386 cf Outflow = 10.77 cfs @ 12.17 hrs, Volume= 44,386 cf, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Summary for Reach TC: Across E3 Inflow Area = 34,016 sf, 47.21% Impervious, Inflow Depth > 5.32" for 100-Year event Inflow = 4.02 cfs @ 12.12 hrs, Volume= 15,094 cf Outflow = 3.56 cfs @ 12.21 hrs, Volume= 15,056 cf, Atten= 11%, Lag= 5.4 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Max. Velocity= 0.72 fps, Min. Travel Time= 2.7 min Avg. Velocity = 0.24 fps, Avg. Travel Time= 8.1 min Peak Storage= 610 cf @ 12.17 hrs Average Depth at Peak Storage= 0.15' Bank-Full Depth= 0.50' Flow Area= 35.0 sf, Capacity= 49.86 cfs 20.00' x 0.50' deep channel, n= 0.150 Sheet flow over Short Grass Side Slope Z-value= 100.0 '/' Top Width= 120.00' Length= 117.0' Slope= 0.1069 '/' Inlet Invert= 144.22', Outlet Invert= 131.71' Summary for Pond D1: Detention Basin Inflow Area = 34,016 sf, 47.21% Impervious, Inflow Depth > 5.33" for 100-Year event Inflow = 4.32 cfs @ 12.10 hrs, Volume= 15,113 cf Outflow = 4.02 cfs @ 12.12 hrs, Volume= 15,094 cf, Atten= 7%, Lag= 1.4 min Primary = 3.53 cfs @ 12.13 hrs, Volume= 14,874 cf Secondary= 0.50 cfs @ 12.11 hrs, Volume= 219 cf Routing by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Peak Elev= 144.99' @ 12.13 hrs Surf.Area= 1,012 sf Storage= 510 cf Plug-Flow detention time= 3.2 min calculated for 15,094 cf(100% of inflow) Center-of-Mass det. time= 2.5 min ( 784.3 - 781.9 ) Pre revision-Watershed_areas Type l//24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10 00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 25 Volume Invert Avail Storage Storage Description #1 144.10' 3,344 cf Detention Basin (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 144.10 0 0 1 0 144.50 583 117 117 145.00 1,018 400 517 145.20 1,500 252 769 145.30 50,000 2,575 3,344 Device Routing Invert Outlet Devices #1 Primary 144.22' 2.0' long x 2.0' 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 Coef. (English) 2.54 2.61 2.61 2.60 2.66 2.70 2.77 2.89 2.88 2.85 3.07 3.20 3.32 #2 Secondary 144.91' 10.0' long x 4.0' 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 5.00 5.50 Coef. (English) 2.38 2.54 2.69 2.68 2.67 2.67 2.65 2.66 2.66 2.68 2.72 2.73 2.76 2.79 2.88 3.07 3.32 Primary OutFlow Max=3.40 cfs @ 12.13 hrs HW=144.97' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 3.40 cfs @ 2.26 fps) Secondary OutFlow Max=0.47 cfs @ 12.11 hrs HW=144.98' (Free Discharge) L2=Broad-Crested Rectangular Weir (Weir Controls 0.47 cfs @ 0.64 fps) I I i Subcatch ent PIA n Subcatchment P2 Subcatchment P1 B Sediment Forebay/Detention z�v Basin Subcatchment P3C Subcatchment 3A Pocket Netland Q3 Wet Wat 3r Quality Swale 41 Subcatchment 3B Overland Design Point �Ut Reach on Link Routing Diagram for Post Revision Watershed_areas Prepared by The Morin-Cameron Group, Inc HydroCAD®10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Post Revision Watershed—areas Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HVdroCAD Software Solutions LLC Page 2 Area Listing (all nodes) Area CN Description (sq-ft) (sul)catchment-numbers) 61,852 ' 80.; >75% Grass cover, Good, HSG D (P1A, P1B, P2, P3A, P313, P3C) 5,038 96 Gravel surface, HSG D (P1A, P1B, P2) 31,021 . 98 Paved parking, HSG D (P1A, P113, P2, P3A) 11,626 98 Roofs, HSG D (PIA, P2) 109,537 88 TOTAL AREA Post Revision Watershed areas Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Paste 3 Soil Listing (all nodes) Area Soil Subcatchment (sq-ft) Group Numbers 0 HSG A 0 HSG B 0 HSG C 109,537 HSG D P1A, P1B, P2, P3A, P3B, P3C 0 Other 109,537 TOTAL AREA Post Revision Watershed_areas Prepared by The Morin-Cameron Group, Inc HydroCAD® 10,00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 4 Ground Covers (all nodes) HSG-A HSG-B HSG-C HSG-D Other Total Ground (sq-ft) (sq-ft) (sq-ft) (sq-ft) (sq-ft) (sq-ft) Cover 0 0 0 61,852 0 61,852 >75% Grass cover, Good 0 0 0 31,021 0 31,021 Paved parking 0 0 0 11,626 0 11,626 Roofs 0 0 0 5,038 0 5,038 Gravel surface 0 0 0 109,537 0 109,537 TOTAL AREA Post Revision Watershed—areas Prepared by The Morin-Cameron Group, Inc HydroCAD® 10 00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 5 Notes Listing (all nodes) Line# Node Notes Number 1 P1A Gravel Areas = Roads and Under Paddle Tennis Courts 2 P1 B Gravel Areas = Roads and Under Paddle Tennis Courts 3 P2 Gravel Areas = Roads and Under Paddle Tennis Courts 4 P3A Gravel Areas = Roads and Under Paddle Tennis Courts 5 P313 Gravel Areas = Roads and Under Paddle Tennis Courts Post Revision Watershed_areas Type 111 24-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 6 Time span=0.00-36.00 hrs, dt=0.01 hrs, 3601 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment P1A: Subcatchment P1A Runoff Area=16,806 sf 50.66% Impervious Runoff Depth=1.53" Flow Length=281' Tc=6.0 min CN=90 Runoff=0.69 cfs 2,144 cf Subcatchment P1B: Subcatchment P1B Runoff Area=7,727 sf 42.28% Impervious Runoff Depth=1.45" Flow Length=258' Tc=6.0 min CN=89 Runoff=0.30 cfs 937 cf Subcatchment P2: Subcatchment P2 Runoff Area=26,939 sf 40.30% Impervious Runoff Depth=1.45" Flow Length=281' Tc=6.0 min CN=89 Runoff=1.05 cfs 3,266 cf Subcatchment P3A: Subcatchment 3A Runoff Area=37,996 sf 52.66% Impervious Runoff Depth=1.45" Flow Length=206' Tc=6.0 min CN=89 Runoff=1.49 cfs 4,606 cf Subcatchment P313: Subcatchment 3B Runoff Area=12,295 sf 0.00% Impervious Runoff Depth=0.89" Flow Length=165' Slope=0.0848 '/' Tc=8.3 min CN=80 Runoff=0.26 cfs 911 cf Subcatchment P3C: Subcatchment P3C Runoff Area=7,774 sf 0.00% Impervious Runoff Depth=0.89" Flow Length=43' Slope=0.1047'/' Tc=3.8 min CN=80 Runoff=0.19 cfs 576 cf Reach DP: Design Point Inflow=2.57 cfs 10,384 cf Outflow=2.57 cfs 10,384 cf Reach TC: Overland Avg. Flow Depth=0.10' Max Vet=6.21 fps Inflow=1.40 cfs 5,789 cf n=0.022 L=45.0' S=0.2222 '/' Capacity=113.34 cfs Outflow=1.40 cfs 5,789 cf Pond D1: Sediment Forebay/Detention Basin Peak Elev=143.23' Storage=992 cf Inflow=2.05 cfs 6,347 cf Primary=1.42 cfs 6,553 cf Secondary=0.00 cfs 0 cf Outflow=1.42 cfs 6,553 cf Pond D2: Pocket Wetland Peak Elev=143.52' Storage=1,715 cf Inflow=1.53 cfs 7,129 cf Primary=1.40 cfs 5,789 cf Secondary=0.00 cfs 0 cf Outflow=1.40 cfs 5,789 cf Pond D3: Wet Water Quality Swale Peak Elev=134.68' Storage=2,600 cf Inflow=1.49 cfs 4,606 cf Outflow=1.12 cfs 3,684 cf Total Runoff Area= 109,537 sf Runoff Volume = 12,439 cf Average Runoff Depth = 1.36" 61.07% Pervious =66,890 sf 38.93%Impervious=42,647 sf Post Revision Watershed_areas Type 111 24-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Pane 7 Summary for Subcatchment P1A: Subcatchment PIA Runoff = 0.69 cfs @ 12.09 hrs, Volume= 2,144 cf, Depth= 1.53" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1-Year Rainfall=2.50" Area (sf) CN Description 6,690 98 Paved parking, HSG D 1,419 96 Gravel surface, HSG D 1,824 98 Roofs, HSG D 6,873 80 >75% Grass cover, Good, HSG D 16,806 90 Weighted Average 8,292 49.34% Pervious Area 8,514 50.66% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.1 50 0.0450 0.20 Sheet Flow, Sheet Flow Grass: Short n= 0.150 P2= 3.10" 0.1 22 0.0450 3.42 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.4 59 0.0180 2.72 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.1 12 0.0330 2.92 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.7 138 0.0290 3.46 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.6 Direct Entry, Direct Entry-0.1 hr Min. 6.0 281 Total Summary for Subcatchment P1 B: Subcatchment P1 B Runoff = 0.30 cfs @ 12.09 hrs, Volume= 937 cf, Depth= 1.45" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1-Year Rainfall=2.50" Area (sf) CN Description 3,267 98 Paved parking, HSG D 3,701 80 >75% Grass cover, Good, HSG D 759 96 Gravel surface, HSG D 7,727 89 Weighted Average 4,460 57.72% Pervious Area 3,267 42.28% Impervious Area Post Revision Watershed_areas Type 1/124-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 8 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.4 50 0.0800 2.05 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.2 54 0.0800 4.55 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.5 154 0.0600 4.97 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 4.9 Direct Entry, Direct Entry-0 1hr Min 6.0 258 Total Summary for Subcatchment P2: Subcatchment P2 Runoff = 1.05 cfs @ 12.09 hrs, Volume= 3,266 cf, Depth= 1.45" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1-Year Rainfall=2.50" Area (sf) CN Description 1,054 98 Paved parking, HSG D 2,860 96 Gravel surface, HSG D 9,802 98 Roofs, HSG.D 13,223 80 >75% Grass cover, Good, HSG D 26,939 89 Weighted Average 16,083 59.70% Pervious Area 10,856 40.30% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0560 1.78 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.3 58 0.0560 3.81 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.1 12 0.0100 2.03 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.3 56 0.0500 3.60 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.5 105 0.0500 3.60 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 4.3 Direct Entry, Direct Emt -0.1 hr. Min 6.0 281 Total Summary for Subcatchment P3A: Subcatchment 3A Runoff = 1.49 cfs @ 12.09 hrs, Volume= 4,606 cf, Depth= 1.45" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1-Year Rainfall=2.50" Post Revision Watershed_areas Type 111 24-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 9 _ Area (sf) CN Description 20,010 98 Paved parking, HSG D 17,986 80 >75% Grass cover, Good, HSG D 37,996 89 Weighted Average 17,986 47.34% Pervious Area 20,010 52.66% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0500 1.70 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.2 58 0.0500 4.54 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.5 98 0.0480 3.53 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 4.8 Direct Entry, Direct Entry-0.1 hr. Min. 6.0 206 Total Summary for Subcatchment P3B: Subcatchment 3B Runoff = 0.26 cfs @ 12.13 hrs, Volume= 911 cf, Depth= 0.89" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1-Year Rainfall=2.50" Area (sf) CN Description 12,295 80 >75% Grass cover, Good, HSG D 12,295 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 165 0.0848 0.33 Sheet Flow, Sheet Flow Grass:Short n= 0.150 P2= 3.10" Summary for Subcatchment P3C: Subcatchment P3C Runoff = 0.19 cfs @ 12.06 hrs, Volume= 576 cf, Depth= 0.89" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 1-Year Rainfall=2.50" Area (sf) CN Description 7,774 80 >75% Grass cover, Good, HSG D 7,774 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.8 43 0.1047 0.19 Sheet Flow, Sheet flow Grass: Dense n= 0.240 P2= 3.10" Post Revision Watershed_areas Type 111 24-hr 9-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCAD®10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 10 Summary for Reach DP: Design Point Inflow Area = 109,537 sf, 38.93% Impervious, Inflow Depth = 1.14" for 1-Year event Inflow = 2.57 cfs @ 12.21 hrs, Volume= 10,384 cf Outflow = 2.57 cfs @ 12.21 hrs, Volume= 10,384 cf, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Summary for Reach TC: Overland Inflow Area = 59,246 sf, 38.21% Impervious, Inflow Depth = 1.17" for 1-Year event Inflow = 1.40 cfs @ 12.26 hrs, Volume= 5,789 cf Outflow = 1.40 cfs @ 12.26 hrs, Volume= 5,789 cf, Atten= 0%, Lag= 0.2 min Routing by Stor-Ind+Trans method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Max. Velocity= 6.21 fps, Min. Travel Time= 0.1 min Avg. Velocity= 1.96 fps, Avg. Travel Time= 0.4 min Peak Storage= 10 cf @ 12.26 hrs- Average Depth at Peak Storage= 0.10' Bank-Full Depth= 1.00' Flow Area= 5.0 sf, Capacity= 113.34 cfs 2.00' x 1.00' deep channel, n= 0.022 Earth, clean &straight Side Slope Z-value= 3.07' Top Width= 8.00' Length= 45.0' Slope= 0.2222 'i' Inlet Invert= 143.50', Outlet Invert= 133.50' Summary for Pond D1: Sediment Forebay/Detention Basin Inflow Area = 51,472 sf, 43.98% Impervious, Inflow Depth = 1.48" for 1-Year event Inflow = 2.05 cfs @ 12.09 hrs, Volume= 6,347 cf Outflow = 1.42 cfs @ 12.17 hrs, Volume= 6,553 cf, Atten= 31%, Lag= 4.9 min Primary = 1.42 cfs @ 12.17 hrs, Volume= 6,553 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Starting Elev= 142.32' Surf.Area= 695 sf Storage= 203 cf Peak Elev= 143.23' @ 12.17 hrs Surf.Area= 1,048 sf Storage= 992 cf (789 cf above start) Plug-Flow detention time= (not calculated: outflow precedes inflow) Center-of-Mass det. time= (not calculated: outflow precedes inflow) Post Revision Watershed_areas Type 111 24-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 11 Volume Invert Avail.Storage Storage Description #1 142.00' 4,556 cf Detention Basin (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 142.00 575 0 0 143.00 950 763 763 144.00 1,375 1,163 1,925 145.00 1,875 1,625 3,550 145.50 2,150 1,006 4,556 Device Routing Invert Outlet Devices #1 Primary 142.00' 18.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet/ Outlet Invert= 142.00'/ 140.00' S= 0.0267 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 1.77 sf #2 Device 1 142.00' 4.0"Vert. Low Flow Orifice C= 0.600 #3 Device 1 142.55' 8.0"Vert. Orifice C= 0.600 #4 Device 1 143.75' 12.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads #5 Secondary 144.50' 10.0' long x 15.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=1.42 cfs @ 12.17 hrs HW=143.23' (Free Discharge) t--1=Culvert (Passes 1.42 cfs of 4.62 cfs potential flow) 2=Low Flow Orifice (Orifice Controls 0.43 cfs @ 4.97 fps) 3=Orifice (Orifice Controls 0.99 cfs @ 2.84 fps) =Grate ( Controls 0.00 cfs) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=142.32' (Free Discharge) L5=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond D2: Pocket Wetland Inflow Area = 59,246 sf, 38.21% Impervious, Inflow Depth = 1.44" for 1-Year event Inflow = 1.53 cfs @ 12.16 hrs, Volume= 7,129 cf Outflow = 1.40 cfs @ 12.26 hrs, Volume= 5,789 cf, Atten= 8%, Lag= 5.9 min Primary = 1.40 cfs @ 12.26 hrs, Volume= 5,789 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Peak Elev= 143.52' @ 12.26 hrs Surf.Area= 1,484 sf Storage= 1,715 cf Plug-Flow detention time= 144.4 min calculated for 5,786 cf(81% of inflow) Center-of-Mass det. time= 62.4 min ( 881.9 - 819.6 ) Volume Invert Avail.Storage Storage Description #1 142.00' 3,447 cf Custom Stage Data(Conic) Listed below (Recalc) Post Revision Watershed_areas Type 111 24-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 12 Elevation Surf.Area Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (cubic-feet) (cubic-feet) (sq-ft) 142.00 825 0 0 825 143.00 1,225 1,018 1,018 1,241 144.00 1,750 1,480 2,498 1,783 144.50 2,050 949 3,447 2,093 Device Routing Invert Outlet Devices #1 Primary 142.00' 12.0" Round Culvert L= 88.0' CPP, mitered to conform to fill, Ke= 0.700 Inlet/Outlet Invert= 142.00'/ 133.00' S= 0.1023 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 0.79 sf #2 Device 1 143.25' 12.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads #3 Secondary 144.00' 4.0' long x 5.0' 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 5.00 5.50 Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65 2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88 Primary OutFlow Max=1.40 cfs @ 12.26 hrs HW=143.52' (Free Discharge) LtCuivert (Passes 1.40 cfs of 3.36 cfs potential flow) 2=Grate (Weir Controls 1.40 cfs @ 1.68 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=142.00' (Free Discharge) L3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond D3: Wet Water Quality Swale Inflow Area = 37,996 sf, 52.66% Impervious, Inflow Depth = 1.45" for 1-Year event Inflow = 1.49 cfs @ 12.09 hrs, Volume=. 4,606 cf Outflow = 1.12 cfs @ 12.16 hrs, Volume= 3,684 cf, Atten= 25%, Lag= 4.2 min Primary = 1.12 cfs @ 12.16 hrs, Volume= 3,684 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Starting Elev= 134.01' Surf.Area= 1,563 sf Storage= 1,253 cf Peak Elev= 134.68' @ 12.16 hrs Surf.Area= 2,438 sf Storage= 2,600 cf (1,347 cf above start) Plug-Flow detention time= 231.9 min calculated for 2,430 cf(53% of inflow) Center-of-Mass det. time= 48.7 min ( 870.0 - 821.3 ) Volume Invert Avail.Storage Storage Description #1 133.00' 3,438 cf Custom Stage Data (Prismatic) Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 133.00 925 0 0 134.00 1,550 1,238 1,238 135.00 2,850 2,200 3,438 Device Routing Invert Outlet Devices #1 Primary 134.50' 6.0' long x 6.0' breadth Broad-Crested Rectangular Weir Post Revision Watershed_areas Type 111 24-hr 1-Year Rainfall=2.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 13 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 5.00 5.50 Coef. (English) 2.37 2.51 2.70 2.68 2.68 2.67 2.65 2.65 2.65 2.65 2.66 2.66 2.67 2.69 2.72 2.76 2.83 Primary OutFlow Max=1.12 cfs @ 12.16 hrs HW=134.68' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 1.12 cfs @ 1.01 fps) Post Revision Watershed_areas Type 111 24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 14 Time span=0.00-36.00 hrs, dt=0.01 hrs, 3601 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PIA: Subcatchment P1A Runoff Area=16,806 sf 50.66% Impervious Runoff Depth=2.08" Flow Length=281' Tc=6.0 min CN=90 Runoff=0.93 cfs 2,908 cf Subcatchment P1B: Subcatchment P1B Runoff Area=7,727 sf 42.28% Impervious Runoff Depth=1.99" Flow Length=258' Tc=6.0 min CN=89 Runoff=0.41 cfs 1,282 cf Subcatchment P2: Subcatchment P2 Runoff Area=26,939 sf 40.30% Impervious Runoff Depth=1.99" Flow Length=281' Tc=6.0 min CN=89 Runoff=1.44 cfs 4,468 cf Subcatchment P3A: Subcatchment 3A Runoff Area=37,996 sf 52.66% Impervious Runoff Depth=1.99" Flow Length=206' Tc=6.0 min CN=89 Runoff=2.02 cfs 6,302 cf Subcatchment P313: Subcatchment 3B Runoff Area=12,295 sf 0.00% Impervious Runoff Depth=1.33" Flow Length=165' Slope=0.0848 '/' Tc=8.3 min CN=80 Runoff=0.40 cfs 1,358 cf Subcatchment P3C: Subcatchment P3C Runoff Area=7,774 sf 0.00% Impervious Runoff Depth=1.33" Flow Length=43' Slope=0.1047 '/' Tc=3.8 min CN=80 Runoff=0.30 cfs 859 cf Reach DP: Design Point Inflow=3.87 cfs 15,121 cf Outflow=3.87 cfs 15,121 cf Reach TC: Overland Avg. Flow Depth=0.12' Max Vet=6.92 fps Inflow=1.92 cfs 8,383 cf n=0.022 L=45.0' S=0.2222 '/' Capacity=113.34 cfs Outflow=1.92 cfs 8,383 cf Pond DI: Sediment Forebay/Detention Basin Peak Elev=143.51' Storage=1,302 cf Inflow=2.78 cfs 8,658 cf Primary=1.82 cfs 8,864 cf Secondary=0.00 cfs 0 cf Outflow=1.82 cfs 8,864 cf Pond D2: Pocket Wetland Peak Elev=143.58' Storage=1,808 cf Inflow=1.98 cfs 9,723 cf Primary=1.92 cfs 8,383 cf Secondary=0.00 cfs 0 cf Outflow=1.92 cfs 8,383 cf Pond D3: Wet Water Quality Swale Peak Elev=134.74' Storage=2,743 cf Inflow=2.02 cfs 6,302 cf Outflow=1.70 cfs 5,381 cf Total Runoff Area= 109,537 sf Runoff Volume = 17,177 cf Average Runoff Depth = 1.88" 61.07% Pervious = 66,890 sf 38.93% Impervious=42,647 sf Post Revision Watershed_areas Type ///24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCAD®10 00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 15 Summary for Subcatchment PIA: Subcatchment P1A Runoff = 0.93 cfs @ 12.09 hrs, Volume= 2,908 cf, Depth= 2.08" Runoff by SCS TR-20 method, UH=SCS,,Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.10" Area (sf) CN Description 6,690 98 Paved parking, HSG D 1,419 96 Gravel surface, HSG D 1,824 98 Roofs, HSG D 6,873 80 >75% Grass cover, Good, HSG D 16,806 90 Weighted Average 8,292 49.34% Pervious Area 8,514 50.66% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.1 50 0.0450 0.20 Sheet Flow, Sheet Flow Grass: Short n= 0.150 P2= 3.10" 0.1 22 0.0450 3.42 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.4 59 0.0180 2.72 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.1 12 0.0330 2.92 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.7 138 0.0290 3.46 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.6 Direct Entry, Direct Entry-0.1 hr Min. 6.0 281 Total Summary for Subcatchment PI B: Subcatchment P1 B Runoff = 0.41 cfs @ 12.09 hrs, Volume= 1,282 cf, Depth= 1.99" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.10" Area (sf) CN Description 3,267 98 Paved parking, HSG D 3,701 80 >75% Grass cover, Good, HSG D 759 96 Gravel surface, HSG D 7,727 89 Weighted Average 4,460 57.72% Pervious Area 3,267 42.28% Impervious Area Post Revision Watershed_areas Type 111 24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 16 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.4 50 0.0800 2.05 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.2 54 0.0800 4.55 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.5 154 0.0600 4.97 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 4.9 Direct Entry, Direct Entry-0.1 hr Min 6.0 258 Total Summary for Subcatchment P2: Subcatchment P2 Runoff = 1.44 cfs @ 12.09 hrs, Volume= 4,468 cf, Depth= 1.99" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.10" Area (sf) CN Description 1,054 98 Paved parking, HSG D 2,860 96 Gravel surface, HSG D 9,802 98 Roofs, HSG D 13,223 80 >75% Grass cover, Good, HSG D 26,939 89 Weighted Average 16,083 59.70% Pervious Area 10,856 40.30% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0560 1.78 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.3 58 0.0560 3.81 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.1 12 0.0100 2.03 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.3 56 0.0500 3.60 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.5 105 0.0500 3.60 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 4.3 Direct Entry, Direct Emt -0.1 hr. Min 6.0 281 Total Summary for Subcatchment P3A: Subcatchment 3A Runoff = 2.02 cfs @ 12.09 hrs, Volume= 6,302 cf, Depth= 1.99" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.10" Post Revision Watershed_areas Type ///24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10 00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 17 Area (sf) CN Description 20,010 98 Paved parking, HSG D 17,986 80 >75% Grass cover, Good, HSG D 37,996 89 Weighted Average 17,986 47.34% Pervious Area 20,010 52.66% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0500 1.70 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.2 58 0.0500 4.54 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.5 98 0.0480 3.53 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 4.8 Direct Entry, Direct Entry- 0.1 hr. Min. 6.0 206 Total Summary for Subcatchment P313: Subcatchment 3B Runoff = 0.40 cfs @ 12.12 hrs, Volume= 1,358 cf, Depth= 1.33" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.10" Area (sf) CN Description 12,295 80 >75% Grass cover, Good, HSG D 12,295 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 165 0.0848 0.33 Sheet Flow, Sheet Flow Grass: Short n= 0.150 P2= 3.10" Summary for Subcatchment P3C: Subcatchment P3C Runoff = 0.30 cfs @ 12.06 hrs, Volume= 859 cf, Depth= 1.33" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 2-Year Rainfall=3.10" Area (sf) CN Description 7,774 80 >75% Grass cover, Good, HSG D 7,774 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.8 43 0.1047 0.19 Sheet Flow, Sheet flow Grass: Dense n= 0.240 P2= 3.10" Post Revision Watershed_areas Type/1/24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 18 Summary for Reach DP: Design Point Inflow Area = 109,537 sf, 38.93% Impervious, Inflow Depth = 1.66" for 2-Year event Inflow = 3.87 cfs @ 12.15 hrs, Volume= 15,121 cf Outflow = 3.87 cfs @ 12.15 hrs, Volume= 15,121 cf, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Summary for Reach TC: Overland Inflow Area = 59,246 sf, 38.21% Impervious, Inflow Depth = 1.70" for 2-Year event Inflow = 1.92 cfs @ 12.22 hrs, Volume= 8,383 cf Outflow = 1.92 cfs @ 12.23 hrs, Volume= 8,383 cf, Atten= 0%, Lag= 0.2 min Routing by Stor-Ind+Trans method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Max. Velocity= 6.92 fps, Min. Travel Time= 0.1 min Avg. Velocity= 2.14 fps, Avg. Travel Time= 0.4 min Peak Storage= 13 cf @ 12.22 hrs Average Depth at Peak Storage= 0.12' Bank-Full Depth= 1.00' Flow Area= 5.0 sf, Capacity= 113.34 cfs 2.00' x 1.00' deep channel, n= 0.022 Earth, clean &straight Side Slope Z-value= 3.0 7' Top Width= 8.00' Length= 45.0' Slope= 0.2222 7' Inlet Invert= 143.50', Outlet Invert= 133.50' Summary for Pond D1: Sediment Forebay/Detention Basin Inflow Area = 51,472 sf, 43.98% Impervious, Inflow Depth = 2.02" for 2-Year event Inflow = 2.78 cfs @ 12.09 hrs, Volume= 8,658 cf Outflow = 1.82 cfs @ 12.18 hrs, Volume= 8,864 cf, Atten= 35%, Lag= 5.5 min Primary = 1.82 cfs @ 12.18 hrs, Volume= 8,864 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Starting Elev= 142.32' Surf.Area= 695 sf Storage= 203 cf Peak Elev= 143.51' @ 12.18 hrs Surf.Area= 1,167 sf Storage= 1,302 cf (1,099 cf above start) Plug-Flow detention time= 19.8 min calculated for 8,656 cf(100% of inflow) Center-of-Mass det. time= 1.8 min ( 812.8 - 810.9 ) Post Revision Watershed_areas Type 111 24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 19 Volume Invert Avail.Storage Storage Description #1 142.00' 4,556 cf Detention Basin (Prismatic) Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 142.00 575 0 0 143.00 950 763 763 144.00 1,375 1,163 1,925 145.00 1,875 1,625 3,550 145.50 2,150 1,006 4,556 Device Routing Invert Outlet Devices #1 Primary 142.00' 18.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet/Outlet Invert= 142.00'/ 140.00' S= 0.0267 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 1.77 sf #2 Device 1 142.00' 4.0"Vert. Low Flow Orifice C= 0.600 #3 Device 1 142.55' 8.0"Vert. Orifice C= 0.600 #4 Device 1 143.75' 12.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads #5 Secondary 144.50' 10.0' long x 15.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=1.82 cfs @ 12.18 hrs HW=143.51' (Free Discharge) L1=Culvert (Passes 1.82 cfs of 5.86 cfs potential flow) iiGrate Low Flow Orifice (Orifice Controls 0.49 cfs @ 5.58 fps) Orifice (Orifice Controls 1.33 cfs @ 3.81 fps)( Controls 0.00 cfs) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=142.32' (Free Discharge) t--5=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond D2: Pocket Wetland Inflow Area = 59,246 sf, 38.21% Impervious, Inflow Depth = 1.97" for 2-Year event Inflow = 1.98 cfs @ 12.16 hrs, Volume= 9,723 cf Outflow = 1.92 cfs @ 12.22 hrs, Volume= 8,383 cf, Atten= 3%, Lag= 3.9 min Primary = 1.92 cfs @ 12.22 hrs, Volume= 8,383 cf Secondary= 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Peak Elev= 143.58' @ 12.22 hrs Surf.Area= 1,517 sf Storage= 1,808 cf Plug-Flow detention time= 113.9 min calculated for 8,377 cf(86% of inflow) Center-of-Mass det. time= 48.8 min ( 864.2 - 815.4 ) Volume Invert Avail.Storage Storage Description #1 142.00' 3,447 cf Custom Stage Data(Conic) Listed below(Recalc) Post Revision Watershed_areas Type/1/24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 20 Elevation Surf.Area Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (cubic-feet) (cubic-feet) (sq-ft) 142.00 825 0 0 825 143.00 1,225 1,018 1,018 1,241 144.00 1,750 1,480 2,498 1,783 144.50 2,;050 949 3,447 2,093 Device Routing Invert Outlet Devices #1 Primary 142.00' 12.0" Round Culvert L= 88.0' CPP, mitered to conform to fill, Ke= 0.700 Inlet/Outlet Invert= 142.00'/ 133.00' S= 0.1023 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 0.79 sf #2 Device 1 143.25' 12.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads #3 Secondary 144.00' 4.0' long x 5.0' 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 5.00 5.50 Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65 2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88 Primary OutFlow Max=1.92 cfs @ 12.22 hrs HW=143.58' (Free Discharge) L1=Culvert (Passes 1.92 cfs of 3.46 cfs potential flow) L2=Grate (Weir Controls 1.92 cfs @ 1.87 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=142.00' (Free Discharge) t3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond D3: Wet Water Quality Swale Inflow Area = 37,996 sf, 52.66% Impervious, Inflow Depth = 1.99" for 2-Year event Inflow = 2.02 cfs @ 12.09 hrs, Volume= 6,302 cf Outflow = 1.70 cfs @ 12.14 hrs, Volume= 5,381 cf, Atten= 16%, Lag= 3.1 min Primary = 1.70 cfs @ 12.14 hrs, Volume= 5,381 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Starting Elev= 134,01' Surf.Area= 1,563 sf Storage= 1,253 cf Peak Elev= 134.74' @ 12.14 hrs Surf.Area= 2,513 sf Storage= 2,743 cf (1,489 cf above start) Plug-Flow detention time= 179.4 min calculated for 4,127 cf(65% of inflow) Center-of-Mass det. time= 40.2 min ( 852.5 - 812.3 ) Volume Invert Avail.Storage Storage Description #1 133.00' 3,438 cf Custom Stage Data(Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 133.00 925 0 0 134.00 1,550 1,238 1,238 135.00 2,850 2,200 3,438 Device Routing Invert Outlet Devices #1 Primary 134.50' 6.0' long x 6.0' breadth Broad-Crested Rectangular Weir Post Revision Watershed areas Type/1/24-hr 2-Year Rainfall=3.10" Prepared by The Morin-Cameron Group, Inc HydroCAD@ 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 21 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 5.00 5.50 Coef. (English) 2.37 2.51 2.70 2.68 2.68 2.67 2.65 2.65 2.65 2.65 2.66 2.66 2.67 2.69 2.72 2.76 2.83 Primary OutFlow Max=1.70 cfs @ 12.14 hrs HW=134.74' (Free Discharge) L1=13road-Crested Rectangular Weir (Weir Controls 1.70 cfs @ 1.18 fps) Post Revision Watershed_areas Type 111 24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©'2011 HydroCAD Software Solutions LLC Page 22 Time span=0.00-36.00 hrs, dt=0.01 hrs, 3601 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment PIA: Subcatchment P1A Runoff Area=16,806 sf 50.66% Impervious Runoff Depth=3.40" Flow Length=281' Tc=6.0 min CN=90 Runoff=1.49 cfs 4,756 cf Subcatchment PIB: Subcatchment P1B Runoff Area=7,727 sf 42.28% Impervious Runoff Depth=3.30" Flow Length=258' Tc=6.0 min CN=89 Runoff=0.67 cfs 2,122 cf Subcatchment P2: Subcatchment P2 Runoff Area=26,939 sf 40.30% Impervious Runoff Depth=3.30" Flow Length=281' Tc=6.0 min CN=89 Runoff=2.34 cfs 7,397 cf Subcatchment P3A: Subcatchment 3A Runoff Area=37,996 sf 52.66% Impervious Runoff Depth=3.30" Flow Length=206' Tc=6.0 min CN=89 Runoff=3.29 cfs 10,434 cf Subcatchment P313: Subcatchment 3B Runoff Area=12,295 sf 0.00% Impervious Runoff Depth=2.46" Flow Length=165' Slope=0.0848'/' Tc=8.3 min CN=80 Runoff=0.75 cfs 2,522 cf Subcatchment P3C: Subcatchment P3C Runoff Area=7,774 sf 0.00% Impervious Runoff Depth=2.46" Flow Length=43' Slope=0.1047 '/' Tc=3.8 min CN=80 Runoff=0.56 cfs 1,595 cf Reach DP: Design Point Inflow=6.28 cfs 26,770 cf Outflow=6.28 cfs 26,770 cf Reach TC: Overland Avg. Flow Depth=0.15' Max Vet=8.02 fps Inflow=3.00 cfs 14,736 cf n=0.022 L=45.0' S=0.2222 '/' Capacity=113.34 cfs Outflow=3.00 cfs 14,736 cf Pond D1: Sediment Forebay/Detention Peak Elev=143.99' Storage=1,911 cf Inflow=4.50 cfs 14,275 cf Primary=3.54 cfs 14,481 cf Secondary=0.00 cfs 0 cf Outflow=3.54 cfs 14,481 cf Pond D2: Pocket Wetland Peak Elev=143.88' Storage=2,293 cf Inflow=3.88 cfs 16,076 cf Primary=3.00 cfs 14,736 cf Secondary=0.00 cfs 0 cf Outflow=3.00 cfs 14,736 cf Pond D3: Wet Water Quality Swale Peak Elev=134.84' Storage=2,987 cf Inflow=3.29 cfs 10,434 cf Outflow=2.88 cfs 9,512 cf Total Runoff Area= 109,537 sf Runoff Volume=28,825 cf Average Runoff Depth =3.16" 61.07% Pervious = 66,890 sf 38.93% Impervious =42,647 sf Post Revision Watershed_areas Type 111 24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 23 Summary for Subcatchment P1A: Subcatchment P1A Runoff = 1.49 cfs @ 12.09 hrs, Volume= 4,756 cf, Depth= 3.40" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.50" Area (sf) CN Description 6,690 98 Paved parking, HSG D 1,419 96 Gravel surface, HSG D 1,824 98 Roofs, HSG D 6,873 80 >75% Grass cover, Good, HSG D 16,806 90 Weighted Average 8,292 49.34% Pervious Area 8,514 50.66% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.1 50 0.0450 0.20 Sheet Flow, Sheet Flow Grass: Short n= 0.150 P2= 3.10" 0.1 22 0.0450 3.42 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.4 59 0.0180 2.72 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.1 12 0.0330 2.92 Shallow Concentrated Flow, Shallow Concentrated Unpaved. Kv= 16.1 fps 0.7 138 0.0290 3.46 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.6 Direct Entry, Direct Entry-0.1 hr Min. 6.0 281 Total Summary for Subcatchment P1 B: Subcatchment P1 B Runoff = 0.67 cfs @ 12.09 hrs, Volume= 2,122 cf, Depth= 3.30" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.50" Area (sf) CN Description 3,267 98 Paved parking, HSG D 3,701 80 >75% Grass cover, Good, HSG D 759 96 Gravel surface, HSG D 7,727 89 Weighted Average 4,460 57.72% Pervious Area 3,267 42.28% Impervious Area Post Revision Watershed-areas Type 111 24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 24 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.4 50 0.0800 2.05 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.2 54 0.0800 4.55 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.5 154 0.0600 4.97 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 4.9 Direct Entry, Direct Entry-0.1hr Min. 6.0 258 Total Summary for Subcatchment P2: Subcatchment P2 Runoff = 2.34 cfs @ 12.09 hrs, Volume= 7,397 cf, Depth= 3.30" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.50" Area (sf) CN Description 1,054 98 Paved parking, HSG D 2,860 96 Gravel surface, HSG D 9,802 98 Roofs, HSG D 13,223 80 >75% Grass cover, Good, HSG D 26,939 89 Weighted Average 16,083 59.70% Pervious Area 40-856 40�30 -ImpeMoas-ATea ---- - -- -- -- --- - - - Tc Length Slope Velocity Capacity Description _(min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0560 1.78 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.3 58 0.0560 3.81 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.1 12 0.0100 2.03 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.3 56 0.0500 3.60 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.5 105 0.0500 3.60 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 4.3 Direct Entry, Direct Emtry-0.1hr. Min 6.0 281 Total Summary for Subcatchment P3A: Subcatchment 3A Runoff = 3.29 cfs @ 12.09 hrs, Volume= 10,434 cf, Depth= 3.30" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.50" Post Revision Watershed_areas Type 111 24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10 00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 25 Area (sf) CN Description 20,010 98 Paved parking, HSG D 17,986 80 >75% Grass cover, Good, HSG D 37,996 89 Weighted Average 17,986 47.34% Pervious Area 20,010 52.66% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0500 1.70 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.2 58 0.0500 4.54 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.5 98 0.0480 3.53 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 4.8 Direct Entry, Direct Entry-0.1 hr. Min. 6.0 206 Total Summary for Subcatchment P3B: Subcatchment 3B Runoff = 0.75 cfs @ 12.12 hrs, Volume= 2,522 cf, Depth= 2.46" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.50" Area (sf) CN Description 12,295 80 >75% Grass cover, Good, HSG D 12,295 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 165 0.0848 0.33 Sheet Flow, Sheet Flow Grass: Short n= 0.150 P2= 3.10" Summary for Subcatchment P3C: Subcatchment P3C Runoff = 0.56 cfs @ 12.06 hrs, Volume= 1,595 cf, Depth= 2.46" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 10-Year Rainfall=4.50" Area (sf) CN Description 7,774 80 >75% Grass cover, Good, HSG D 7,774 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.8 43 0.1047 0.19 Sheet Flow, Sheet flow Grass: Dense n= 0.240 P2= 3.10" Post Revision Watershed_areas Type /I/24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 26 Summary for Reach DP: Design Point Inflow Area = 109,537 sf, 38.93% Impervious, Inflow Depth = 2.93" for 10-Year event Inflow = 6.28 cfs @ 12.15 hrs, Volume= 26,770 cf Outflow = 6.28 cfs @ 12.15 hrs, Volume= 26,770 cf, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Summary for Reach TC: Overland Inflow Area = 59,246 sf, 38.21% Impervious, Inflow Depth = 2.98" for 10-Year event Inflow = 3.00 cfs @ 12.23 hrs, Volume= 14,736 cf Outflow = 3.00 cfs @ 12.24 hrs, Volume= 14,736 cf, Atten= 0%, Lag= 0.2 min Routing by Stor-Ind+Trans method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Max. Velocity= 8.02 fps, Min. Travel Time= 0.1 min Avg. Velocity= 2.48 fps, Avg. Travel Time= 0.3 min Peak Storage= 17 cf @ 12.24 hrs Average Depth at Peak Storage= 0.15' Bank-Full Depth= 1.00' Flow Area= 5.0 sf, Capacity= 113.34 cfs 2.00' x 1.00' deep channel, n= 0.022 Earth, clean & straight Side Slope Z-value= 3.0 7' Top Width= 8.00' Length= 45.0' Slope= 0.2222 T Inlet Invert= 143.50', Outlet Invert= 133.50' Summary for Pond D1: Sediment Forebay/Detention Basin Inflow Area = 51,472 sf, 43.98% Impervious, Inflow Depth = 3.33" for 10-Year event Inflow = 4.50 cfs @ 12.09 hrs, Volume= 14,275 cf Outflow = 3.54 cfs @ 12.15 hrs, Volume= 14,481 cf, Atten= 21%, Lag= 3.7 min Primary = 3.54 cfs @ 12.15 hrs, Volume= 14,481 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Starting Elev= 142.32' Surf.Area= 695 sf Storage= 203 cf Peak Elev= 143.99' @ 12.15 hrs Surf.Area= 1,371 sf Storage= 1,911 cf (1,707 cf above start) Plug-Flow detention time= 17.9 min calculated for 14,274 cf(100% of inflow) Center-of-Mass det. time= 7.1 min ( 804.0 - 796.9 ) Post Revision Watershed_areas Type III 24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 27 Volume Invert Avail.Storage Storage Description #1 142.00' 4,556 cf Detention Basin (Prismatic) Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 142.00 575 0 0 143.00 950 763 763 144.00 1,375 1,163 1,925 145.00 1,875 1,625 3,550 145.50 2,150 1,006 4,556 Device Routing Invert Outlet Devices #1 Primary 142.00' 18.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet/Outlet Invert= 142.00'/ 140.00' S= 0.0267 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 1.77 sf #2 Device 1 142.00' 4.0"Vert. Low Flow Orifice C= 0.600 #3 Device 1 142.55' 8.0"Vert. Orifice C= 0.600 #4 Device 1 143.75' 12.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads #5 Secondary 144.50' 10.0' long x 15.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=3.54 cfs @ 12.15 hrs HW=143.99' (Free Discharge) L1=Culvert (Passes 3.54 cfs of 7.48 cfs potential flow) E32=Low Flow Orifice (Orifice Controls 0.57 cfs @ 6.50 fps) =Orifice (Orifice Controls 1.77 cfs @ 5.06 fps) =Grate (Weir Controls 1.20 cfs @ 1.60 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=142.32' (Free Discharge) L5=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond D2: Pocket Wetland Inflow Area = 59,246 sf, 38.21% Impervious, Inflow Depth = 3.26" for 10-Year event Inflow = 3.88 cfs @ 12.14 hrs, Volume= 16,076 cf Outflow = 3.00 cfs @ 12.23 hrs, Volume= 14,736 cf, Atten= 23%, Lag= 5.5 min Primary = 3.00 cfs @ 12.23 hrs, Volume= 14,736 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Peak Elev= 143.88' @ 12.23 hrs Surf.Area= 1,682 sf Storage= 2,293 cf Plug-Flow detention time= 80.0 min calculated for 14,733 cf(92% of inflow) Center-of-Mass det. time= 35.7 min ( 841.7 - 806.0 ) Volume Invert Avail.Storage Storage Description #1 142.00' 3,447 cf Custom Stage Data(Conic) Listed below(Recalc) Post Revision Watershed-areas Type 111 24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCAD®10.00 s/n 00401 ©2011 HvdroCAD Software Solutions LLC Page 28 Elevation Surf.Area Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (cubic-feet) (cubic-feet) (sq-ft) 142.00 825 0 0 825 143.00 1,225 1,018 1,018 1,241 144.00 1,750 1,480 2,498 1,783 144.50 2,050 949 3,447 2,093 Device Routing Invert Outlet Devices #1 Primary 142.00' 12.0" Round Culvert L= 88.0' CPP, mitered to conform to fill, Ke= 0.700 Inlet/Outlet Invert= 142.00'/ 133.00' S= 0.1023 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 0.79 sf #2 Device 1 143.25' 12.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads #3 Secondary 144.00' 4.0' long x 5.0' 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 5.00 5.50 Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65 2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88 Primary OutFlow Max=3.00 cfs @ 12.23 hrs HW=143,88' (Free Discharge) t-1=Culvert (Passes 3.00 cfs of 3.92 cfs potential flow) t-2=Grate (Orifice Controls 3.00 cfs @ 3.82 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=142.00' (Free Discharge) L3=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond D3: Wet Water Quality Swale Inflow Area = 37,996 sf, 52.66% Impervious, Inflow Depth = 3.30" for 10-Year event Inflow = 3.29 cfs @ 12.09 hrs, Volume= 10,434 cf Outflow = 2.88 cfs @ 12.13 hrs, Volume= 9,512 cf, Atten= 13%, Lag= 2.7 min Primary = 2.88 cfs @ 12.13 hrs, Volume= 9,512 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Starting Elev= 134.01' Surf.Area= 1,563 sf Storage= 1,253 cf Peak Elev= 134,84' @ 12.13 hrs Surf.Area= 2,637 sf Storage= 2,987 cf (1,734 cf above start) Plug-Flow detention time= 130.6 min calculated for 8,259 cf(79% of inflow) Center-of-Mass det. time= 32.4 min ( 830.5 - 798.1 ) Volume Invert Avail.Storage Storage Description #1 133.00' 3,438 cf Custom Stage Data(Prismatic) Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 133.00 925 0 0 134.00 1,550 1,238 1,238 135.00 2,850 2,200 3,438 Device Routing Invert Outlet Devices #1 Primary 134.50' 6.0' long x 6.0' breadth Broad-Crested Rectangular Weir Post Revision Watershed_areas Type 111 24-hr 10-Year Rainfall=4.50" Prepared by The Morin-Cameron Group, Inc HydroCAD®10 00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 29 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 5.00 5.50 Coef. (English) 2.37 2.51 2.70 2.68 2.68 2.67 2.65 2.65 2.65 2.65 2.66 2.66 2.67 2.69 2.72 2.76 2.83 Primary OutFlow Max=2.88 cfs @ 12.13 hrs HW=134.84' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 2.88 cfs @ 1.43 fps) Post Revision Watershed_areas Type III24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 30 Time span=0.00-36.00 hrs, dt=0.01 hrs, 3601 points Runoff by SCS TR-20 method, UH=SCS Reach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind method Subcatchment P1A: Subcatchment P1A Runoff Area=16,806 sf 50.66% Impervious Runoff Depth=5.33" Flow Length=281' Tc=6.0 min CN=90 Runoff=2.29 cfs 7,470 cf Subcatchment P1B: Subcatchment P1B Runoff Area=7,727 sf 42.28% Impervious Runoff Depth=5.22" Flow Length=258' Tc=6.0 min CN=89 Runoff=1.04 cfs 3,362 cf Subcatchment P2: Subcatchment P2 Runoff Area=26,939 sf 40.30% Impervious Runoff Depth=5.22" Flow Length=281' Tc=6.0 min CN=89 Runoff=3.61 cfs 11,720 cf Subcatchment P3A: Subcatchment 3A Runoff Area=37,996 sf 52.66% Impervious Runoff Depth=5.22" Flow Length=206' Tc=6.0 min CN=89 Runoff=5.10 cfs 16,531 cf Subcatchment P313: Subcatchment 3B Runoff Area=12,295 sf 0.00% Impervious Runoff Depth=4.24" Flow Length=165' Slope=0.0848 '/' Tc=8.3 min CN=80 Runoff=1.29 cfs 4,339 cf Subcatchment P3C: Subcatchment P3C Runoff Area=7,774 sf 0.00% Impervious Runoff Depth=4.24" Flow Length=43' Slope=0.1047'/' Tc=3.8 min CN=80 Runoff=0.95 cfs 2,744 cf Reach DP: Design Point Inflow=10.74 cfs 44,110 cf Outflow=10.74 cfs 44,110 cf Reach TC: Overland Avg. Flow Depth=0.22' Max Vet=9.79 fps Inflow=5.63 cfs 24,162 cf n=0.022 L=45.0' S=0.2222 '/' Capacity=113.34 cfs Outflow=5.62 cfs 24,162 cf Pond D1: Sediment Forebay/Detention Peak Elev=144.37' Storage=2,465 cf Inflow=6.94 cfs 22,552 cf Primary=5.64 cfs 22,758 cf Secondary=0.00 cfs 0 cf Outflow=5.64 cfs 22,758 cf Pond D2: Pocket Wetland Peak Elev=144.32' Storage=3,079 cf Inflow=6.28 cfs 25,502 cf Primary=3.90 cfs 23,019 cf Secondary=1.72 cfs 1,143 cf Outflow=5.63 cfs 24,162 cf Pond D3: Wet Water Quality Swale Peak Elev=134.95' Storage=3,288 cf Inflow=5.10 cfs 16,531 cf Outflow=4.58 cfs 15,609 cf Total Runoff Area= 109,537 sf Runoff Volume=46,166 cf Average Runoff Depth = 5.06" 61.07% Pervious=66,890 sf 38.93% Impervious=42,647 sf Post Revision Watershed_areas Type 111 24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HydroCAD®10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 31 Summary for Subcatchment PIA: Subcatchment PIA Runoff = 2.29 cfs @ 12.08 hrs, Volume= 7,470 cf, Depth= 5.33" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=6.50" Area (sf) CN Description 6,690 98 Paved parking, HSG D 1,419 96 Gravel surface, HSG D 1,824 98 Roofs, HSG D 6,873 80 >75% Grass cover, Good, HSG D 16,806 90 Weighted Average 8,292 49.34% Pervious Area 8,514 50.66% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 4.1 50 0.0450 0.20 Sheet Flow, Sheet Flow Grass: Short n= 0.150 P2= 3.10" 0.1 22 0.0450 3.42 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.4 59 0.0180 2.72 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.1 12 0.0330 2.92 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.7 138 0.0290 3.46 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.6 Direct Entry, Direct Entry-0.1hr Min. 6.0 281 Total Summary for Subcatchment P1 B: Subcatchment P1 B Runoff = 1.04 cfs @ 12.08 hrs, Volume= 3,362 cf, Depth= 5.22" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=6.50" Area (sf) CN Description 3,267 98 Paved parking, HSG D 3,701 80 >75% Grass cover, Good, HSG D 759 96 Gravel surface, HSG D 7,727 89 Weighted Average 4,460 57.72% Pervious Area 3,267 42.28% Impervious Area Post Revision Watershed areas Type 111 24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc iydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC t Page 32 Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) _ 0.4 50 0.0800 2.05 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.2 54 0.0800 4.55 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.5 154 0.0600 4.97 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 4.9 Direct Entry, Direct Entry-0.1hr Min. 6.0 258 Total Summary for Subcatchment P2: Subcatchment P2 Runoff = 3.61 cfs @ 12.08 hrs, Volume= 11,720 cf, Depth= 5.22" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=6.50" Area (sf) CN Description 1,054 98 Paved parking, HSG D 2,860 96 Gravel surface, HSG D 9,802 98 Roofs, HSG D 13,223 80 >75% Grass cover, Good, HSG D 26,939 89 Weighted Average 16,083 59.70% Pervious Area 10,856 40.30% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0560 1.78 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.3 58 0.0560 3.81 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.1 12 0.0100 2.03 Shallow Concentrated Flow, Shallow Concentrated Paved Kv= 20.3 fps 0.3 56 0.0500 3.60 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 0.5 105 0.0500 3.60 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 4.3 Direct Entry, Direct Emt -0.1hr. Min 6.0 281 Total Summary for Subcatchment P3A: Subcatchment 3A Runoff = 5.10 cfs @ 12.08 hrs, Volume= 16,531 cf, Depth= 5.22" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=6.50" Post Revision Watershed_areas Type 111 24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HydroCAD®10 00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 33 Area (sf) CN Description 20,010 98 Paved parking, HSG D 17,986 80 >75% Grass cover, Good, HSG D 37,996 89 Weighted Average 17,986 47.34% Pervious Area 20,010 52.66% Impervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 0.5 50 0.0500 1.70 Sheet Flow, Sheet Flow Smooth surfaces n= 0.011 P2= 3.10" 0.2 58 0.0500 4.54 Shallow Concentrated Flow,Shallow Concentrated Paved Kv= 20.3 fps 0.5 98 0.0480 3.53 Shallow Concentrated Flow, Shallow Concentrated Unpaved Kv= 16.1 fps 4.8 Direct Entry, Direct Entry-0.1 hr. Min. 6.0 206 Total Summary for Subcatchment P313: Subcatchment 3B Runoff = 1.29 cfs @ 12.12 hrs, Volume= 4,339 cf, Depth= 4.24" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=6.50" Area (sf) CN Description 12,295 80 >75% Grass cover, Good, HSG D 12,295 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 8.3 165 0.0848 0.33 Sheet Flow, Sheet Flow Grass: Short n= 0.150 P2= 3.10" Summary for Subcatchment P3C: Subcatchment P3C Runoff = 0.95 cfs @ 12.06 hrs, Volume= 2,744 cf, Depth= 4.24" Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Type III 24-hr 100-Year Rainfall=6.50" Area (sf) CN Description 7,774 80 >75% Grass cover, Good, HSG D 7,774 100.00% Pervious Area Tc Length Slope Velocity Capacity Description (min) (feet) (ft/ft) (ft/sec) (cfs) 3.8 43 0.1047 0.19 Sheet Flow, Sheet flow Grass: Dense n= 0.240 P2= 3.10" Post Revision Watershed_areas Type 111 24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 34 Summary for Reach DP: Design Point Inflow Area = 109,537 sf, 38.93% Impervious, Inflow Depth = 4.83" for 100-Year event Inflow = 10.74 cfs @ 12.16 hrs, Volume= 44,110 cf Outflow = 10.74 cfs @ 12.16 hrs, Volume= 44,110 cf, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Summary for Reach TC: Overland Inflow Area = 59,246 sf, 38.21% Impervious, Inflow Depth = 4.89" for 100-Year event Inflow = 5.63 cfs @ 12.21 hrs, Volume= 24,162 cf Outflow = 5.62 cfs @ 12.21 hrs,, Volume= 24,162 cf, Atten= 0%, Lag= 0.1 min Routing by Stor-Ind+Trans method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Max. Velocity= 9.79 fps, Min. Travel Time= 0.1 min Avg. Velocity=2.83 fps, Avg. Travel Time= 0.3 min Peak Storage= 26 cf @ 12.21 hrs Average Depth at Peak Storage= 0.22' Bank-Full Depth= 1.00' Flow Area= 5.0 sf, Capacity= 113.34 cfs 2.00' x 1.00' deep channel, n= 0.022 Earth, clean & straight Side Slope Z-value= 3.0 7' Top Width= 8.00' Length= 45.0' Slope= 0.2222 7' Inlet Invert= 143.50', Outlet Invert= 133.50' Summary for Pond D1: Sediment Forebay/Detention Basin Inflow Area = 51,472 sf, 43.98% Impervious, Inflow Depth = 5.26" for 100-Year event Inflow = 6.94 cfs @ 12.08 hrs, Volume= 22,552 cf Outflow = 5.64 cfs @ 12.14 hrs, Volume= 22,758 cf, Atten= 19%, Lag= 3.4 min Primary = 5.64 cfs @ 12.14 hrs, Volume= 22,758 cf Secondary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Starting Elev= 142.32' Surf.Area= 695 sf Storage= 203 cf Peak Elev= 144.37' @ 12.14 hrs Surf.Area= 1,559 sf Storage= 2,465 cf (2,262 cf above start) Plug-Flow detention time= 15.9 min calculated for 22,549 cf(100% of inflow) Center-of-Mass det. time= 9.2 min ( 793.7 - 784.4 ) Post Revision Watershed_areas Type 111 24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HyrlroC:AD@ 10.00 s/n 00401 n 2011 HydroCAD Software Solutions LLC Page 35 Volume Invert Avail Storage Storage Description #1 142.00' 4,556 cf Detention Basin (Prismatic) Listed below (Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 142.00 575 0 0 143.00 950 763 763 144.00 1,375 1,163 1,925 145.00 1,875 1,625 3,550 145.50 2,150 1,006 4,556 Device Routing Invert Outlet Devices #1 Primary 142.00' . 18.0" Round Culvert L= 75.0' CMP, projecting, no headwall, Ke= 0.900 Inlet/Outlet Invert= 142.00'/ 140.00' S= 0.0267 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 1.77 sf #2 Device 1 142.00' 4.0"Vert. Low Flow Orifice C= 0.600 #3 Device 1 142.55' 8.0"Vert. Orifice C= 0.600 #4 Device 1 143.75' 12.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads #5 Secondary 144.50' 10.0' long x 15.0' breadth Broad-Crested Rectangular Weir Head (feet) 0.20 0.40 0.60 0.80 1.00 1.20 1.40 1.60 Coef. (English) 2.68 2.70 2.70 2.64 2.63 2.64 2.64 2.63 Primary OutFlow Max=5.64 cfs @ 12.14 hrs HW=144.37' (Free Discharge) L1=Culvert (Passes 5.64 cfs of 8.54 cfs potential flow) E32=Low Flow Orifice (Orifice Controls 0.62 cfs @ 7.14 fps) =Orifice (Orifice Controls 2.05 cfs @ 5.87 fps) =Grate (Orifice Controls 2.97 cfs @ 3.78 fps) Secondary OutFlow Max=0.00 cfs @ 0.00 hrs HW=142.32' (Free Discharge) L5=Broad-Crested Rectangular Weir ( Controls 0.00 cfs) Summary for Pond D2: Pocket Wetland Inflow Area = 59,246 sf, 38.21% Impervious, Inflow Depth = 5.17" for 100-Year event Inflow = 6.28 cfs @ 12.12 hrs, Volume= 25,502 cf Outflow = 5.63 cfs @ 12.21 hrs, Volume= 24,162 cf, Atten= 10%, Lag= 5.1 min Primary = 3.90 cfs @ 12.21 hrs, Volume= 23,019 cf Secondary = 1.72 cfs @ 12.21 hrs, Volume= 1,143 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Peak Elev= 144.32' @ 12.21 hrs Surf.Area= 1,936 sf Storage= 3,079 cf Plug-Flow detention time= 57.9 min calculated for 24,152 cf(95% of inflow) Center-of-Mass det. time= 27.6 min ( 822.9 - 795.3 ) Volume Invert Avail Storage Storage Description #1 142.00' 3,447 cf Custom Stage Data(Conic) Listed below(Recalc) Post Revision Watershed_areas Type 111 24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 36 Elevation Surf.Area Inc.Store Cum.Store Wet.Area (feet) (sq-ft) (cubic-feet) (cubic-feet) (sq-ft) 142.00 825 0 0 825 143.00 1,225 1,018 1,018 1,241 144.00 1,750 1,480 2,498 1,783 144.50 2,050 949 3,447 2,093 Device Routing Invert Outlet Devices #1 Primary 142.00' 12.0" Round Culvert L= 88.0' CPP, mitered to conform to fill, Ke= 0.700 Inlet/Outlet Invert= 142.00'/ 133.00' S= 0.1023 '/' Cc= 0.900 n= 0.010 PVC, smooth interior, Flow Area= 0.79 sf #2 Device 1 143.25' 12.0" Horiz. Grate C= 0.600 Limited to weir flow at low heads #3 Secondary 144.00' 4.0' long x 5.0' 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 5.00 5.50 Coef. (English) 2.34 2.50 2.70 2.68 2.68 2.66 2.65 2.65 2.65 2.65 2.67 2.66 2.68 2.70 2.74 2.79 2.88 Primary OutFlow Max=3.90 cfs @ 12.21 hrs HW=144.31' (Free Discharge) L1=Culvert (Passes 3.90 cfs of 4.50 cfs potential flow) L2=Grate (Orifice Controls 3.90 cfs @ 4.97 fps) Secondary OutFlow Max=1.72 cfs @ 12.21 hrs HW=144.31' (Free Discharge) L3=Broad-Crested Rectangular Weir (Weir Controls 1.72 cfs @ 1.36 fps) Summary for Pond D3: Wet Water Quality Swale Inflow Area = 37,996 sf, 52.66% Impervious, Inflow Depth = 5.22" for 100-Year event Inflow = 5.10 cfs @ 12.08 hrs, Volume= 16,531 cf Outflow = 4.58 cfs @ 12.12 hrs, Volume= 15,609 cf, Atten= 10%, Lag= 2.4 min Primary = 4.58 cfs @ 12.12 hrs, Volume= 15,609 cf Routing by Stor-Ind method, Time Span= 0.00-36.00 hrs, dt= 0.01 hrs Starting Elev= 134.01' Surf.Area= 1,563 sf Storage= 1,253 cf Peak Elev= 134.95' @ 12.12 hrs Surf.Area= 2,781 sf Storage= 3,288 cf (2,035 cf above start) Plug-Flow detention time= 101.8 min calculated for 14,356 cf(87% of inflow) Center-of-Mass det. time= 26.8 min ( 812.3 - 785.6 ) Volume Invert Avail.Storage Storage Description #1 133.00' 3,438 cf Custom Stage Data (Prismatic) Listed below(Recalc) Elevation Surf.Area Inc.Store Cum.Store (feet) (sq-ft) (cubic-feet) (cubic-feet) 133.00 925 0 0 134.00 1,550 1,238 1,238 135.00 2,850 2,200 3,438 Device Routing Invert Outlet Devices #1 Primary 134.50' 6.0' long x 6.0' breadth Broad-Crested Rectangular Weir Post Revision Watershed_areas Type 111 24-hr 100-Year Rainfall=6.50" Prepared by The Morin-Cameron Group, Inc HydroCAD®10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Page 37 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 5.00 5.50 Coef. (English) 2.37 2.51 2.70 2.68 2.68 2.67 2.65 2.65 2.65 2.65 2.66 2.66 2.67 2.69 2.72 2.76 2.83 Primary OutFlow .Max=4.57 cfs @ 12.12 hrs HW=134.95' (Free Discharge) L1=Broad-Crested Rectangular Weir (Weir Controls 4.57 cfs @ 1.71 fps) I Stormwater Management Calculations Standard 3: Recharge To Groundwater: Static Method Existing Impervious Area=32,637 SF Proposed Impervious Area = 42,647 SF There is an increase in the amount of impervious surface of 9,348 SF Hydrologic Soil Group Recharge Rainfall Depth D 0.101, Recharge Volume Required = [0.10" x 10,010 SF] = 1,001/12 SF-In= 84 CF Although we are not claiming any recharge credit for the proposed development, the Wet Water Quality Swale and the Pocket Wetland will eventually return 2,608 CF of water to groundwater. Drawdown Analysis: Static Method Pocket Wetland Average bottom area= (825 + 1,225)/2 = 1,018 SF Infiltration volume (below lowest outlet 143.25) = 1,340 CF Pocket Wetland Drawdown time = ((1,340/0.27)X12)/1,018= 58.5 hours Standard 4: Water Quality Volume (WQV): Use water quality depth of 1" For Zone A Critical Area 1. Pocket Wetland Area Impervious = 11,011 SF (PIA, P I B and P2) WQV = 1" X I I,OI I SF/l2" Pavement = 918 CF 1,340 CF of Storage Provided in Pocket Wetland 10-Year Storm center-of-mass detention Time = 35.7 minutes (9 min.) 2. Wet Water Quality Swale (WWQS) Area Impervious = 18,996 SF (P3A) WQV = 1" X 20,010 SF/12" Pavement = 1,668 CF 2,175 CF of Storage Provided in Wet Water Quality Swale 10-Year Storm center-of-mass detention Time = 32.4 minutes (9 min.) Sediment Forebay Sizing Sediment Forebay/Detention Pond Volume = 0.1" X 11,011 SF/12" = 92 CF Required 781 CF of Storage Provided in Sediment Forebay below outlet WWQS Sediment Forebay 1 Volume = 0.1" X 20 10SF/12" = 167 CF Required Area Elev 133 = 46 sf; Area Elev 134.25 = 245 sf; Average Area = 145 sf X 1.25 ft = 181 cf 181 CF of Storage Provided in Sediment Forebay 1 below outlet WWQS Sediment Forebay 2 Volume = 0.1" X 20,010 SF/12" = 167 CF Required Area Elev 133 = 76 sf, Area Elev 134.25 = 256 sf, Average Area = 166 X 1.25 ft= 207 cf 207 CF of Storage Provided in Sediment Forebay 1 below outlet HydroCAD Analysis Summary Following is a listing of the total pre and post statistics for the Hydrologic analysis of the site for the 1, 2, 10 and 100 year rainfall events: Stormwater Rate of Runoff at the Design Point Event Existing Conditions Proposed Conditions Change in Peak (Years) (Peak CFS) (Peak CFS) (CFS) 1 2.74 2.57 -0.17 2 3.88 3.87 -0.01 10 6.66 6.28 -0.22 100 10.77 10.74 -0.03 Stormwater Volume of Runoff at the Design Point Event Existing Conditions Proposed Conditions Change in Peak (Years) (Peak CF) (Peak CF) (CF) 1 11,315 10,384 -931 2 15,892 15,121 -771 10 27,276 26,770 -506 100 44,386 44,110 -276 Stormwater Velocities from the Post-Development Stormwater BMP's Event Water Quality Swale Pocket Wetland Culvert Pocket Wetland Weir (Years) (FPS) (FPS) (FPS) 1 1.01 1.68 0 2 1.18 1.87 0 10 1.43 3.82 0 100 1.71 4.97 1.36 THE MORIN-CAMERON GROUP, INC. Water447 Boston Street,US Route 1 Topsfield, MA 01983 NAME: 500 Great Pond Road Proj. No.: 3006 p 1978.887.8586 m 1781.520.9496 North Andover, MA Date: 6/10/2014 CLIENT: North Andover Country Club Revised: COUNTY: Essex Southern Computed by: Scott P. Cameron, P.E. Checked by: John M. Morin, P.E. B C D E F TSS Removal Starting TSS Amount Remaining BMP Rate Load (*F) Removed (C*D) Load (D-E) _ Sediment Forebay 0.25 1.00 0.25 0.75 0> .0 Sediment Forebay 0.25 0.75 0.19 0.56 EWater Quality Swale- Wet 0.70 0.56 11 0.39 0.17 IF V V 0.00 0.17 ]F-0.00 0.17 Cn 0.00 0.17 0.00 0.17 Total TSS Removal = 83% "Equals remaining load from previous BMP (E) which enters the BMP Non-automated TSS Calculation Sheet must be used if Proprietary BMP Proposed 1.From MassDEP Stormwater Handbook Vol.1 Mass.Dept.of Environmental Protection THE MORIN-CAMERON GROUP, INC. 'Standard 4: TSS Calculation for Constructed Wetland 447 Boston Street, US Route 1 Topsfield, MA 01983 NAME: 500 Great Pond Road Proj. No.: 3006 p 1978.887.8586 m 1781.520.9496 North Andover, MA Date: 6/10/2014 CLIENT: North Andover Country Club Revised: COUNTY: Essex Southern Computed by: Scott P. Cameron, P.E. Checked by: John M. Morin, P.E. B C D E F TSS Removal Starting TSS Amount Remaining BMP Rate _ Load (*F) Removed (C*D) Load (D-E) tCj Deep Sump and Hooded Catch Basin 0.25 1.00 0.25 0.75 = 0 O Sediment Forebay j 0.25 0.75 0.19 0.56 Constructed Stormwater 0.80.80 0.56 0.45 0.11 U) V 0.00 0.11 0.00 0.11 0.00IL 0.11 0. 10 0.11 Total TSS Removal = 89% *Equals remaining load from previous BMP (E) which enters the BMP Non-automated TSS Calculation Sheet must be used if Proprietary BMP Proposed 1.From MassDEP Stormwater Handbook Vol.1 Mass.Dept.of Environmental Protection Post Revision Watershed_areas Type ///24-hr INQ Rainfall=1.00" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond D1: Sediment Forebay/Detention Basin Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 142.00 575 0 144.60 1,675 2,840 142.05 594 29 144.65 1,700 2,924 142.10 612 59 144.70 1,725 3,010 142.15 631 90 144.75 1,750 3,097 142.20 650 122 144.80 1,775 3,185 142.25 669 155 144.85 1,800 3,274 142.30 688 189 144.90 1,825 3,365 142.35 706 224 144.95 1,850 3,457 142.40 725 260 145.00 1,875 3,550 142.45 744 297 145.05 1,903 3,644 142.50 763 334 145.10 1,930 3,740 142.55 781 373 145.15 1,958 3,837 142.60 800 412 145.20 1,985 3,936 142.65 819 453 145.25 2,013 4,036 142.70 837 494 145.30 2,040 4,137 142.75 856 537 145.35 2,067 4,240 142.80 875 580 145.40 2,095 4,344 142.85 894 624 145.45 2,122 4,4.49 142.90 913 669 145.50 2,150 4,556 142.95 931 715 143.00 950 763 143.05 971 811 143.10 992 860 143.15 1,014 910 143.20 1,035 961 143.25 1,056 1,013 143.30 1,078 1,067 143.35 1,099 1,121 143.40 1,120 1,177 143.45 1,141 1,233 143.50 1,163 1,291 143.55 1,184 1,349 143.60 1;205 1,409 143.65 1,226 1,470 143.70 1,247 1,532 143.75 1,269 1,595 143.80 1,290 1,659 143.85 1,311 1,724 143.90 1,333 1,790 143.95 -1,354 1,857 144.00 1,375 1,925 144.05 1,400 1,994 144.10 1,425 2,065 144.15 1,450 2,137 144.20 1,475 2,210 144.25 1,500 2,284 144.30 1,525 2,360 144.35 1,550 2,437 144.40 1,575 2,515 144.45 1,600 2,594 144.50 1,625 2,675 144.55 1,650 2,757 Post Revision Watershed_areas Type /ll 24-hr WQ Rainfall=1.00" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond D2: Pocket Wetland Elevation Surface Storage (feet) (sq-ft) (cubic-feet) 142.00 825 0 142.05 843 42 142.10 861 84 142.15 880 128 142.20 899 172 142.25 918 218 142.30 937 264 142.35 956 311 142.40 976 360 142.45 995 409 142.50 1,015 459 142.55 1,035 510 142.60 1,056 563 142.65 1,076 616 142.70 1,097 670 142.75 1,118 726 142.80 1,139 782 142.85 1,160 840 142.90 1,181 898 142.95 1,203 958 143.00 1,225 1,018 143.05 1,249 1,080 143.10 1,273 1,143 143.15 1,298 1,208 143.20 1,323 1,273 143.25 1,347 1,340 143.30 1,373 1,408 143.35 1,398 1,477 143.40 1,424 1,548 143.45 1,450 1,620 143.50 1,476 1,693 143.55 1,502 1,767 143.60 1,529 1,843 143.65 1,556 1,920 143.70 1,583 1,998 143.75 1,610 2,078 143.80 1,638 2,159 143.85 1,665 2,242 143.90 1,693 2,326 143.95 1,722 2,411 144.00 1,750 2,498 144.05 1,779 2,586 144.10 1,808 2,676 144.15 1,838 2,767 144.20 1,867 2,860 144.25 1,897 2,954 144.30 1,927 3,050 144.35 1,958 3,147 144.40 1,988 3,245 144.45 2,019 3,345 144.50 2,050 3,447 Post Revision Watershed_areas Type/1/24-hr WQ Rainfall=1.00" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Stage-Area-Storage for Pond D3: Wet Water Quality Swale Elevation Surface Storage Elevation Surface Storage (feet) (sq-ft) (cubic-feet) (feet) (sq-ft) (cubic-feet) 133.00 925 0 134.04 1,602 1,301 133.02 938 19 134.06 1,628 1,333 133.04 950 37 134.08 1,654 1,366 133.06 963 57 134.10 1,680 1,399 133.08 975 76 134.12 1,706 1,433 133.10 987 96 134.14 1,732 1,467 133.12 1,000 116 134.16 1,758 1,502 133.14 1,012 136 134.18 1,784 1,538 133.16 1,025 156 134.20 1,810 1,573 133.18 1,038 177 134.22 1,836 1,610 133.20 1,050 197 134.24 1,862 1,647 133.22 1,062 219 134.26 1,888 1,684 133.24 1,075 240 134.28 1,914 1,722 133.26 1,087 262 134.30 1,940 1,761 133.28 1,100 284 134.32 1,966 1,800 133.30 1,113 306 134.34 1,992 1,840 133.32 1,125 328 134.36 2,018 1,880 133.34 1,138 351 134.38 2,044 1,920 133.36 1,150 374 134.40 2,070 1,962 133.38 1,162 397 134.42 2,096 2,003 133.40 1.,175 420 134.44 2,122 2,045 133.42 1,187 444 134.46 2,148 2,088 133.44 1,200 467 134.48 2,174 2,131 133.46 1,213 492 134.50 2,200 2,175 133.48 1,225 516 134.52 2,226 2,219 133.50 1,238 541 134.54 2,252 2,264 133.52 1,250 566 134.56 2,278 2,309 133.54 1,262 591 134.58 2,304 2,355 133.56 1,275 616 134.60 2,330 2,401 133.58 1,288 642 134.62 2,356 2,448 133.60 1,300 667 134.64 2,382 2,496 133.62 1,313 694 134.66 2,408 2,544 133.64 1,325 720 134.68 2,434 2,592 133.66 1,337 747 134.70 2,460 2,641 133.68 1,350 774 134.72 2,486 2,690 133.70 1,362 801 134.74 2,512 2,740 133.72 1,375 828 134.76 2,538 2,791 133.74 1,388 856 134.78 2,564 2,842 133.76 1,400 883 134.80 2,590 2,894 133.78 1,413 912 134.82 2,616 2,946 133.80 1,425 940 134.84 2,642 2,998 133.82 1,437 969 134.86 2,668 3,051 133.84 1,450 998 134.88 2,694 3,105 133.86 1,463 1,027 134.90 2,720 3,159 133.88 1,475 1,056 134.92 2,746 3,214 133.90 1,488 1,086 134.94 2,772 3,269 133.92 1,500 1,115 134.96 2,798 3,325 133.94 1,512 1,146 134.98 2,824 3,381 133.96 1,525 1,176 135.00 2,850 3,438 133.98 1,537 1,207 134.00 1,550 1,238 134.02 1,576 1,269 Pre revision-Watershed_areas Type 111 24-hr WQ Rainfall=1.00" Prepared by The Morin-Cameron Group, Inc HydroCAD® 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Summary for Reach DP: Design Point [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 109,537 sf, 29.80% Impervious, Inflow Depth > 0.20" for WQ event Inflow = 0.35 cfs @ 12.32 hrs, Volume= 1,840 cf Outflow = 0.35 cfs @ 12.32 hrs, Volume= 1,840 cf, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.10 hrs Post Revision Watershed_areas Type/1/24-hr WQ Rainfall=1.00" Prepared by The Morin-Cameron Group, Inc HydroCADO 10.00 s/n 00401 ©2011 HydroCAD Software Solutions LLC Summary for Reach DP: Design Point [40] Hint: Not Described (Outflow=Inflow) Inflow Area = 109,537 sf, 38.93% Impervious, Inflow Depth > 0.03" for WQ event Inflow = 0.01 cfs @ 20.17 hrs, Volume= 277 cf Outflow = 0.01 cfs @ 20.17 hrs, Volume= 277 cf, Atten= 0%, Lag= 0.0 min Routing by Stor-Ind+Trans method, Time Span= 0.00-36M hrs, dt= 0.01 hrs