Inflow Area = 70,567 sf, 24.69% Impervious, Inflow Depth = 3.66" for 100 YR-C event
Inflow = 4.20 cfs @ 12.11 hrs, Volume = 21,540 cf
Outflow = 1.89 cfs @ 12.36 hrs, Volume = 20,033 cf, Atten = 55%, Lag = 15.2 min
Primary = 1.89 cfs @ 12.36 hrs, Volume = 20,033 cf
Routed to Pond 2P: Subsurface Infiltration Basin 1
Routed to Pond 2P : Subsurface Infiltration Basin 1
Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs
Peak Elev= 95.10' @ 12.36 hrs Surf.Area= 1,500 sf Storage= 7,644 cf
Plug-Flow detention time= 277.7 min calculated for 20,030 cf (93% of inflow)
Center-of-Mass det. time= 237.6 min (1,046.5 - 808.9)
| Volume | Invert | Avail.Storage | Storage Description |
|---|
| #1 | 90.00' | 8,250 cf | Custom Stage Data (Prismatic) | Listed below (Recalc) |
| Elevation
(feet) | Surf.Area
(sq-ft) | Inc.Store
(cubic-feet) | Cum.Store
(cubic-feet) |
| 90.00 | 1,500 | 0 | 0 |
| 95.50 | 1,500 | 8,250 | 8,250 |
| Device | Routing | Invert | Outlet Devices |
|---|
| #1 | Device 3 | 91.00' | 2.5" Vert. Orifice C = 0.600 Limited to weir flow at low heads |
|---|
| #2 | Device 3 | 95.00' | 48.0" x 48.0" Horiz. Grate C = 0.600 Limited to weir flow at low heads |
|---|
| #3 | Primary | 87.48' | 12.0" Round Culvert\n L = 28.0' RCP, groove end projecting, Ke = 0.200\nInlet / Outlet Invert= $ 87.48'/87.00' $ S = 0.0171'/' Cc = 0.900\n n = 0.012 Concrete pipe, finished, Flow Area= $ 0.79sf $ |
|---|
| Primary OutFlow Max=1.88 cfs @ 12.36 hrs HW=95.10' TW=87.34' (Dynamic Tailwater)
3=Culvert (Passes 1.88 cfs of 12.03 cfs potential flow)
1=Orifice (Orifice Controls 0.33 cfs @ 9.62 fps)
2=Grate (Weir Controls 1.55 cfs @ 1.01 fps) |
| Pond 5P: BIORETENTION BASIN 1A
Orifice |