SW6211001_Design Calculations (Curve Number, Pond 2)_20220128

927-WAYSIDE APARTMENTS
WET POND #2
SCS curve number
Hydraulic Soi Group: A
Area SCS CN
Building (sf)
49,769
98
Sidewalk (sf)
12,794
98
Pavement (sf)
73,782
98
Pond (sf)
33,513
98
Open space (sf)
103,991
60
Offsite -open space (sf)
0
60
Total (sf) 273849 84
Total (ac) 6.29
Rational Coefficient
Pre -development
Post -development
Area
C
Area
C
Building (sf)
0
0.95
Building (sf)
49,769
0.95
Sidewalk (sf)
0
0.95
Sidewalk (sf)
12,794
0.95
Pavement (sf)
0
0.95
Pavement (sf)
73,782
0.95
Pond (sf)
0
0.95
Pond (sf)
33,513
0.95
Open space (sf)
155,025
0.30
Open space (sf)
103,991
0.30
Offsite -open space (sf)
0
0.30
Offsite -open space (sf)
0
0.30
Total (sf) 155025 0.30
Total (ac) 3.56
Total (sf) 273849 0.70
Total (ac) 6.29
927-POND 2 Runoff coefficient 100-yr retention.xls Printed 1/28/2022