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Existing 2yearEARLEEDA-03EDA-04EDA-05PRINCEBTI2RMill RiverEXCBDP-3DP-4DP-5Drainage Diagram for Existing120307Prepared by Tighe&Bond 12/3/2007HydroCAD® 8.00 s/n 003772 © 2006 HydroCAD Software Solutions LLCSubcatReachPondLinkExisting120307Page 2Prepared by Tighe&Bond12/3/2007HydroCAD® 8.00 s/n 003772 © 2006 HydroCAD Software Solutions LLCArea Listing (all nodes)Area (acres)CNDescription (subcats)1.507 49 50-75% Grass cover, Fair, HSG A (EDA-04)6.577 69 50-75% Grass cover, Fair, HSG B (EDA-03,EDA-04,EDA-05)0.600 74 >75% Grass cover, Good, HSG C (EARLE,PRINCE)0.416 74 >75%Grass cover,Good,HSGCMonument (EDA-05)12.153 79 50-75% Grass cover, Fair, HSG C (EDA-03,EDA-04,EDA-05)0.114 98 Paved parking (EDA-03)1.950 98 Paved parking & roofs (EARLE,PRINCE)1.316 98 Paved roads w/curbs & sewers (EDA-04,EDA-05)0.769 98 Roofs (EDA-03,EDA-04)1.286 98 roofs (EDA-05) 26.689 Type III 24-hr 2 Year Rainfall=2.90"Existing120307Page 3Prepared by Tighe&Bond12/3/2007HydroCAD® 8.00 s/n 003772 © 2006 HydroCAD Software Solutions LLCTime span=0.00-24.00 hrs, dt=0.03 hrs, 801 pointsRunoff by SCS TR-20 method, UH=SCSReach routing by Stor-Ind+Trans method - Pond routing by Stor-Ind methodRunoff Area=1.000 ac Runoff Depth>1.73"Subcatchment EARLE: Tc=6.0 min CN=88 Runoff=2.02 cfs 0.144 afRunoff Area=51,378 sf Runoff Depth>1.06"Subcatchment EDA-03: Flow Length=290' Tc=11.2 min CN=78 Runoff=1.18 cfs 0.104 afRunoff Area=481,702 sf Runoff Depth>0.79"Subcatchment EDA-04: Flow Length=950' Tc=18.9 min CN=73 Runoff=6.42 cfs 0.730 afRunoff Area=518,430 sf Runoff Depth>1.17"Subcatchment EDA-05: Flow Length=700' Tc=11.8 min CN=80 Runoff=13.21 cfs 1.163 afRunoff Area=1.550 ac Runoff Depth>2.35"Subcatchment PRINCE: BTI Tc=6.0 min CN=95 Runoff=4.04 cfs 0.304 af Inflow=23.45 cfs 2.444 afReach 2R: Mill River Outflow=23.45 cfs 2.444 afPeak Elev=136.76' Inflow=14.69 cfs 1.307 afPond EX: Primary=6.84 cfs 1.151 af Secondary=7.85 cfs 0.156 af Outflow=14.69 cfs 1.307 af Inflow=4.98 cfs 0.407 afLink DP-3: Primary=4.98 cfs 0.407 af Inflow=6.42 cfs 0.730 afLink DP-4: Primary=6.42 cfs 0.730 af Inflow=14.69 cfs 1.307 afLink DP-5: Primary=14.69 cfs 1.307 afTotal Runoff Area = 26.689 ac Runoff Volume = 2.444 af Average Runoff Depth = 1.10"79.64% Pervious Area = 21.255 ac 20.36% Impervious Area = 5.435 acType III 24-hr 2 Year Rainfall=2.90"Existing120307Page 4Prepared by Tighe&Bond12/3/2007HydroCAD® 8.00 s/n 003772 © 2006 HydroCAD Software Solutions LLCSubcatchment EARLE: Runoff = 2.02 cfs @ 12.09 hrs, Volume= 0.144 af, Depth> 1.73"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.03 hrsType III 24-hr 2 Year Rainfall=2.90"Area (ac) CN Description0.600 98 Paved parking & roofs0.400 74 >75% Grass cover, Good, HSG C1.000 88 Weighted Average0.400 Pervious Area0.600 Impervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)6.0Direct Entry, Subcatchment EDA-03: Runoff = 1.18 cfs @ 12.16 hrs, Volume= 0.104 af, Depth> 1.06"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.03 hrsType III 24-hr 2 Year Rainfall=2.90"Area (sf) CN Description4,979 98 Paved parking592 98 Roofs14,280 69 50-75% Grass cover, Fair, HSG B31,527 79 50-75% Grass cover, Fair, HSG C51,378 78 Weighted Average45,807 Pervious Area5,571 Impervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)9.2 50 0.0150 0.09Sheet Flow, Grass: Dense n= 0.240 P2= 3.20"2.0 240 0.0800 1.98Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps11.2 290 TotalSubcatchment EDA-04: Runoff = 6.42 cfs @ 12.29 hrs, Volume= 0.730 af, Depth> 0.79"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.03 hrsType III 24-hr 2 Year Rainfall=2.90" Type III 24-hr 2 Year Rainfall=2.90"Existing120307Page 5Prepared by Tighe&Bond12/3/2007HydroCAD® 8.00 s/n 003772 © 2006 HydroCAD Software Solutions LLCArea (sf) CN Description32,900 98 Roofs30,086 98 Paved roads w/curbs & sewers65,666 49 50-75% Grass cover, Fair, HSG A190,520 69 50-75% Grass cover, Fair, HSG B162,530 79 50-75% Grass cover, Fair, HSG C481,702 73 Weighted Average418,716 Pervious Area62,986 Impervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)9.2 50 0.0150 0.09Sheet Flow, Grass: Dense n= 0.240 P2= 3.20"8.4 500 0.0200 0.99Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps1.3 400 0.0850 5.12 25.61Channel Flow, Area= 5.0 sf Perim= 11.0' r= 0.45'n= 0.050 Scattered brush, heavy weeds18.9 950 TotalSubcatchment EDA-05: Runoff = 13.21 cfs @ 12.17 hrs, Volume= 1.163 af, Depth> 1.17"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.03 hrsType III 24-hr 2 Year Rainfall=2.90"Area (sf) CN Description56,012 98 roofs27,219 98 Paved roads w/curbs & sewers81,710 69 50-75% Grass cover, Fair, HSG B335,347 79 50-75% Grass cover, Fair, HSG C18,142 74 >75%Grass cover,Good,HSGCMonument518,430 80 Weighted Average435,199 Pervious Area83,231 Impervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)8.2 50 0.0200 0.10Sheet Flow, Grass: Dense n= 0.240 P2= 3.20"2.4 300 0.0900 2.10Shallow Concentrated Flow, Short Grass Pasture Kv= 7.0 fps0.6 210 0.1150 5.96 29.79Channel Flow, Area= 5.0 sf Perim= 11.0' r= 0.45'n= 0.050 Scattered brush, heavy weeds0.6 140 0.0550 4.12 20.60Channel Flow, Area= 5.0 sf Perim= 11.0' r= 0.45'n= 0.050 Scattered brush, heavy weeds11.8 700 TotalType III 24-hr 2 Year Rainfall=2.90"Existing120307Page 6Prepared by Tighe&Bond12/3/2007HydroCAD® 8.00 s/n 003772 © 2006 HydroCAD Software Solutions LLCSubcatchment PRINCE: BTIRunoff = 4.04 cfs @ 12.09 hrs, Volume= 0.304 af, Depth> 2.35"Runoff by SCS TR-20 method, UH=SCS, Time Span= 0.00-24.00 hrs, dt= 0.03 hrsType III 24-hr 2 Year Rainfall=2.90"Area (ac) CN Description1.350 98 Paved parking & roofs0.200 74 >75% Grass cover, Good, HSG C1.550 95 Weighted Average0.200 Pervious Area1.350 Impervious AreaTc Length Slope Velocity Capacity Description(min) (feet) (ft/ft) (ft/sec) (cfs)6.0Direct Entry, Reach 2R: Mill RiverInflow Area = 26.689 ac, Inflow Depth > 1.10" for 2 Year eventInflow = 23.45 cfs @ 12.17 hrs, Volume= 2.444 afOutflow = 23.45 cfs @ 12.17 hrs, Volume= 2.444 af, Atten= 0%, Lag= 0.0 minRouting by Stor-Ind+Trans method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrsPond EX: Inflow Area = 12.902 ac, Inflow Depth > 1.22" for 2 Year eventInflow = 14.69 cfs @ 12.16 hrs, Volume= 1.307 afOutflow = 14.69 cfs @ 12.16 hrs, Volume= 1.307 af, Atten= 0%, Lag= 0.0 minPrimary = 6.84 cfs @ 12.16 hrs, Volume= 1.151 afSecondary = 7.85 cfs @ 12.16 hrs, Volume= 0.156 afRouting by Stor-Ind method, Time Span= 0.00-24.00 hrs, dt= 0.03 hrsPeak Elev= 136.76' @ 12.16 hrsFlood Elev= 136.50'Device Routing Invert Outlet Devices#1 Primary 134.00'15.0" x 640.0' long Culvert CPP, square edge headwall, Ke= 0.500 Outlet Invert= 127.60' S= 0.0100 '/' Cc= 0.900 n= 0.013 Clay tile #2 Secondary 136.50'20.0' long (Profile 2) Broad-Crested Rectangular Weir Head (feet) 0.49 0.98 1.48 Coef. (English) 2.90 3.26 3.44 Primary OutFlow Max=6.83 cfs @ 12.16 hrs HW=136.76' (Free Discharge)1=Culvert (Barrel Controls 6.83 cfs @ 5.57 fps)Secondary OutFlow Max=7.74 cfs @ 12.16 hrs HW=136.76' (Free Discharge)2=Broad-Crested Rectangular Weir (Weir Controls 7.74 cfs @ 1.48 fps) Type III 24-hr 2 Year Rainfall=2.90"Existing120307Page 7Prepared by Tighe&Bond12/3/2007HydroCAD® 8.00 s/n 003772 © 2006 HydroCAD Software Solutions LLCLink DP-3: Inflow Area = 2.729 ac, Inflow Depth > 1.79" for 2 Year eventInflow = 4.98 cfs @ 12.10 hrs, Volume= 0.407 afPrimary = 4.98 cfs @ 12.10 hrs, Volume= 0.407 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.03 hrsLink DP-4: Inflow Area = 11.058 ac, Inflow Depth > 0.79" for 2 Year eventInflow = 6.42 cfs @ 12.29 hrs, Volume= 0.730 afPrimary = 6.42 cfs @ 12.29 hrs, Volume= 0.730 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.03 hrsLink DP-5: Inflow Area = 12.902 ac, Inflow Depth > 1.22" for 2 Year eventInflow = 14.69 cfs @ 12.16 hrs, Volume= 1.307 afPrimary = 14.69 cfs @ 12.16 hrs, Volume= 1.307 af, Atten= 0%, Lag= 0.0 minPrimary outflow = Inflow, Time Span= 0.00-24.00 hrs, dt= 0.03 hrs