Stout Landing Subdivision - 1283-Runoff coefficient calcs

1283 Stout Landing Pond 1
Storm Water Control
SCS curve number
Hydraulic Soil Group :A
Area SCS CN
Lots (sf) 864,000 98
Pavement (sf) 368,562 98
Open space (sf) 1,570,111 49
Offsite -open space (sf) 402,428 39
Offsite -impervious (sf) 0 98
Total (sf)3205101 67
Total (ac)73.58
Rational Coefficient
Predevelopment Postdevelopment
Area C Area C
Impervious (sf) 0 0.95 Building (sf) 864,000 0.95
Open space (sf) 3,205,101 0.30 Pavement (sf) 368,562 0.95
Open space (sf) 1,570,111 0.30
Offsite -open space (sf) 402,428 0.30
Offsite -impervious (sf) 0 0.95
Total (ac)3205101 0.30 Total (ac)3205101 0.59
Total (ac)73.58 Total (ac)73.58
1283-Runoff coefficient calcs.xls Printed 3/19/2019