SW6230705_Design Calculations_20230831 (39)

SERENTIY
SCM#16
SCS curve number
Hydraulic Soil Group: A
Area SCS CN
Building(sf) 163,840 98
Sidewalk(sf) 24,372 98
Pavement(sf) 74,322 98
Pond(sf) 22,573 98
Open space(sf) 263,690 49
Offsite-open space(sf) 0 49
Offsite-impervious(sf) 0 98
Total(sf) 548797 74
Total(ac) 12.60
Rational Coefficient
Pre-development Post-development
Area C Area C
Building(sf) 0.95 Building(sf) 163,840 0.95
Sidewalk(sf) 0.95 Sidewalk(sf) 24,372 0.95
Pavement(sf) 0.95 Pavement(sf) 74,322 0.95
Open space(sf) 548,797 0.30 Pond(sf) 22,573 0.95
Offsite-open space(sf) 0.40 Open space(sf) 263,690 0.30
Offsite-impervious(sf) 0.95 Offsite-open space(sf) 0 0.30
Offsite-impervious(sf) 0 0.95
Total(sf) 548797 0.30
Total(ac) 12.60 Total(sf) 548797 0.64
Total(ac) 12.60
01 Coefficient-16.xls Printed 7/7/2023