SW6220101_Design Calculations_20230831 (7)

Creekside Oaks South
Wet Pond
SCS curve number
Hydraulic Soil Group: B
Area SCS CN
Lots(sf) 228,000 98
Sidewalk(sf) 15,984 98
Pavement(sf) 107,814 98
Pond area(sf) 21,182 98
Open space(sf) 440,201 69
Offsite-open space(sf) 0 69
Offsite-impervious(sf) 15,963 98
Total(sf) 829144 83
Total(ac) 19.03
Rational Coefficient
Pre-development Post-development
Area C Area C
Building(sf) 0 0.95 Building(sf) 228,000 0.95
Sidewalk(sf) 0 0.95 Sidewalk(sf) 15,984 0.95
Pavement(sf) 0 0.95 Pavement(sf) 107,814 0.95
Open space(sf) 813,181 0.30 Pond area(sf) 21,182 0.95
Offsite-open space(sf) 0 0.40 Open space(sf) 440,201 0.30
Offsite-impervious(sf) 15,963 0.95 Offsite-open space(sf) 0 0.30
Offsite-impervious(sf) 15,963 0.95
Total(sf) 829144 0.31
Total(ac) 19.03 Total(sf) 829144 0.60
Total(ac) 19.03
1070-Runoff coefficient.xls Printed 8/31/2023