SW6220201_Design Calculations (Curve Number)_20220510

WOODSHUZE PHASE 8
WET POND 1
SCS curve number
Hydraulic Soil Group:
C
Area
SCS CN
Used 68 lots within DA @ 3000 per lot
Building (sf)
204,000
98
Sidewalk (sf)
15,353
98
Pavement (sf)
101,894
98
Pond (sf)
25,000
98
Open space (sf)
454,361
79
Offsite -open space (sf)
0
79
Offsite -impervious (sf)
0
98
Total (sf)
800608
87
Total (ac)
18.38
Rational Coefficient
Post -development
Pre -development
Area
C
Area
C
Building (sf)
204,000
0.90
Building (sf)
0
0.95
Sidewalk (sf)
15,353
0.90
Sidewalk (sf)
0
0.95
Pavement (sf)
101,894
0.90
Pavement (sf)
0
0.95
Pond (sf)
25,000
0.90
Open space (sf)
800,608
0.30
Open space (sf)
454,361
0.30
Offsite -open space (sf)
0
0.40
Offsite -open space (sf)
0
0.30
Offsite -impervious (sf)
0
0.95
Offsite -impervious (sf)
0
0.9
Total (sf) 800608
Total (ac) 18.38
0.30
Total (sf) 800608 0.56
Total (ac) 18.38
1775 Coefficient & Vol Req.xls Printed 5/10/2022