Summary for Pond 2P: Subsurface Infiltration Basin 1

Inflow Area = 73,567 sf, 27.76% Impervious, Inflow Depth = 3.64" for 100 YR-C event

Inflow = 2.01 cfs @ 12.36 hrs, Volume= 22,343 cf

Outflow = 0.57 cfs @ 12.04 hrs, Volume= 22,343 cf, Atten= 72%, Lag= 0.0 min

Discarded = 0.57 cfs @ 12.04 hrs, Volume= 22,343 cf

Primary = 0.00 cfs @ 0.00 hrs, Volume= 0 cf

Routed to Link 32L : POA1

Routing by Dyn-Stor-Ind method, Time Span= 0.00-72.00 hrs, dt= 0.01 hrs

Peak Elev= 89.07' @ 13.63 hrs Surf.Area= 2,475 sf Storage= 2,711 cf

Plug-Flow detention time= 22.7 min calculated for 22,340 cf (100% of inflow)

Center-of-Mass det. time= 22.7 min ( 1,037.0 - 1,014.3 )

Volume Invert Avail.Storage Storage Description

#1A 87.00' 4,349 cf 27.50'W x 90.00'L x 6.00'H Field A

#2A 87.50' 3,188 cf 14,850 cf Overall - 3,979 cf Embedded = 10,871 cf x 40.0% Voids

Inside= 36.1"W x 36.1"H => 7.10 sf x 20.00'L = 142.0 cf

7,536 cf Total Available Storage

ADS N-12 36" x 20 Inside #1

Outside= 42.0"W x 42.0"H => 8.86 sf x 20.00'L = 177.2 cf

20 Chambers in 5 Rows

24.50' Header x 7.10 sf x 2 = 347.9 cf Inside

Storage Group A created with Chamber Wizard

Device Routing Invert Outlet Devices #1 Primary 92.59' 48.0" x 48.0" Horiz. Grate C= 0.600 #2 Device 1 88.00' 12.0" Round Culvert L= 119.0' RCP, square edge headwall, Ke= 0.500 Inlet / Outlet Invert= 88.00' / 86.00' S= 0.0168'/' Cc= 0.900 n= 0.012 Concrete pipe, finished, Flow Area= 0.79 sf #3 Discarded 87.00' 10.000 in/hr Exfiltration over Surface area Phase-In= 0.01' Discarded OutFlow Max=0.57 cfs @ 12.04 hrs HW=87.07' (Free Discharge) 3=Exfiltration (Exfiltration Controls 0.57 cfs) Primary OutFlow Max=0.00 cfs @ 0.00 hrs HW=87.00' TW=0.00' (Dynamic Tailwater) 1=Grate ( Controls 0.00 cfs) 2=Culvert ( Controls 0.00 cfs) Pond 2P: Subsurface Infiltration Basin 1