SW6190602_Engineering Calculations (Runoff Coefficient)_20190619

1479-Edgerton Industrial Park Pond 1
Storm Water Control
SCS curve number
Hydraulic Soil Group: B
Area SCS CN
Building (sf)
98
Pavement (sf)
559,077
98
Open space (sf)
186,359
61
Offsite -open space (sf)
61
Offsite -impervious (sf)
98
Total (sf)
745436
89
Total (ac)
17.11
Rational Coefficient
Predevelopment
Area C
Impervious (sf) 0.95
Open space (sf) 745,436 0.30
Total (ac) 745436 0.30
Total (ac) 17.11
Postdevelopment
Area
C
Building (sf)
0.95
Pavement (sf)
559,077
0.95
Open space (sf)
186,359
0.30
Offsite -open space (sf)
0.30
Offsite -impervious (sf)
0.95
Total (ac)
745436
0.79
Total (ac) 17.11
1479 Runoff coefficient calcs.xls Printed 6/19/2019