SW6230705_Design Calculations_20230831 (23)

SERENTIY
SCM#14
SCS curve number
Hydraulic Soil Group: A
Area SCS CN
Building(sf) 186,180 98
Sidewalk(sf) 26,443 98
Pavement(sf) 81,843 98
Pond(sf) 18,196 98
Open space(sf) 345,452 49
Offsite-open space(sf) 0 49
Offsite-impervious(sf) 0 98
Total(sf) 658114 72
Total(ac) 15.11
Rational Coefficient
Pre-development Post-development
Area C Area C
Building(sf) 0.95 Building(sf) 186,180 0.95
Sidewalk(sf) 0.95 Sidewalk(sf) 26,443 0.95
Pavement(sf) 0.95 Pavement(sf) 81,843 0.95
Open space(sf) 658,114 0.30 Pond(sf) 18,196 0.95
Offsite-open space(sf) 0.40 Open space(sf) 345,452 0.30
Offsite-impervious(sf) 0.95 Offsite-open space(sf) 0 0.30
Offsite-impervious(sf) 0 0.95
Total(sf) 658114 0.30
Total(ac) 15.11 Total(sf) 658114 0.61
Total(ac) 15.11
01 Coefficient-14.xls Printed 7/7/2023