SW6240102_Design Calculations_20240507 (9)

Raeford Vass Rd DG
Infiltration Basin
Drainage Area: 73,356 sf
1.68 ac
Impervious Area: 47,958 sf
1.10 ac
%Impervious: 65.4%
1 inch Storm Event:
Rv=0.05+0.009 I
Rv=runoff coefficient
I=percent impervious
Rv= 0.6384
For volume that must be controlled:
Volume=3,6 3 0*Rd*Rv*A
Volume required: 3,903 cf
Volume provided: 5,230 cf
Recommended Surface Area: 418 sf
Factor of safety: 2
Design volume: 3,903 cf
Infiltration rate: 3.11 in/hr
Max dewater time 72 hrs
Surface area provided: 2,600 sf