SW6211001_Design Calculations (Curve Number, Pond 1)_20211014

927-WAYSIDE APARTMENTS
WET POND #1
SCS curve number
Hydraulic Soi Group: A
Area SCS CN
Building (sf)
59,267
98
Sidewalk (sf)
22,749
98
Pavement (sf)
81,453
98
Pond (sf)
25,109
98
Open space (sf)
111,775
60
Offsite -open space (sf)
0
60
Total (sf) 300353 84
Total (ac) 6.90
Rational Coefficient
Pre -development
Post -development
Area
C
Area
C
Building (sf)
0
0.95
Building (sf)
59,267
0.95
Sidewalk (sf)
0
0.95
Sidewalk (sf)
22,749
0.95
Pavement (sf)
0
0.95
Pavement (sf)
81,453
0.95
Pond (sf)
0
0.95
Pond (sf)
25,109
0.95
Open space (sf)
300,353
0.30
Open space (sf)
111,775
0.30
Offsite -open space (sf)
0
0.30
Offsite -open space (sf)
0
0.30
Total (sf) 300353 0.30
Total (ac) 6.90
Total (sf) 300353 0.71
Total (ac) 6.90
927-POND 1 Runoff coefficient.xls Printed 10/14/2021