SW6230705_Design Calculations_20230831 (14)

SERENTIY
SCM#13
SCS curve number
Hydraulic Soil Group: A
Area SCS CN
Building(sf) 282,780 98
Sidewalk(sf) 35,254 98
Pavement(sf) 117,534 98
Pond(sf) 17,304 98
Future(sf) 20,000 98
Open space(sf) 505,935 49
Offsite-open space(sf) 0 49
Offsite-impervious(sf) 0 98
Total(sf) 978807 73
Total(ac) 22.47
Rational Coefficient
Pre-development Post-development
Area C Area C
Building(sf) 0.95 Building(sf) 282,780 0.95
Sidewalk(sf) 0.95 Sidewalk(sf) 35,254 0.95
Pavement(sf) 0.95 Pavement(sf) 117,534 0.95
Open space(sf) 978,807 0.30 Pond(sf) 17,304 0.95
Offsite-open space(sf) 0.40 Future(sf) 20,000 0.95
Offsite-impervious(sf) 0.95 Open space(sf) 505,935 0.30
Offsite-open space(sf) 0 0.30
Total(sf) 978807 0.30 Offsite-impervious(sf) 0 0.95
Total(ac) 22.47
Total(sf) 978807 0.61
Total(ac) 22.47
01 Coefficient-13.xls Printed 7/7/2023