SW6230705_Design Calculations_20240304 (15)

SERENTIY
SCM#13
SCS curve number
Hydraulic Soil Group: A
Area SCS CN 47
Building(sf) 264,900 98 7
Sidewalk(sf) 35,254 98 32
Pavement(sf) 117,534 98
Pond(sf) 17,304 98
Future(sf) 20,000 98
Open space(sf) 495,028 49
Offsite-open space(sf) 0 49
Offsite-impervious(sf) 28,787 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) 264,900 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) 495,028 0.30
Offsite-open space(sf) 0 0.30
Total(sf) 978807 0.30 Offsite-impervious(sf) 28,787 0.95
Total(ac) 22.47
Total(sf) 978807 0.62
Total(ac) 22.47
01 Coefficient-13.xls Printed 3/4/2024