SW6241006_Design Calculations_20241118 (5)

Fayetteville Cumberland Rd Dollar General
Infiltration Basin#1
SCS curve number
Hydraulic Soil Group: A
Area SCS CN
Building(sf) 10,746 98
Sidewalk(sf) 98
Pavement(sf) 20,716 98
Pond(sf) 98
Open space(sf) 4,487 39
Offsite-open space(sf) 69
Offsite-impervious(sf) 98
Total(sf) 35949 91
Total(ac) 0.83
Rational Coefficient
Pre-development Post-development
Area C Area C
Building(sf) 5,937 0.95 Building(sf) 10,746 0.95
Sidewalk(sf) 0.95 Sidewalk(sf) 0.95
Pavement(sf) 0.95 Pavement(sf) 20,716 0.95
Open space(sf) 20,429 0.15 Pond(sf) 0.95
Offsite-open space(sf) 0.40 Open space(sf) 4,487 0.15
Offsite-impervious(sf) 0.95 Offsite-open space(sf) 0.30
Offsite-impervious(sf) 0.95
Total(sf) 26366 0.33
Total(ac) 0.61 Total(sf) 35949 0.85
Total(ac) 0.83
2093-Runoff coefficient.xls Printed 11/18/2024