SW6240804_Design Calculations_20241015 (5)

4D Site Solutions, Inc.
PIPE CALCULATIONS
NOTE:sheet only set up to handle Tc from 5 min to 30 min
A. Cross-pipes to use 25-yr storm inensity
2041-Drake Landing Subdivision
Rainfall Intensity
Storm Event 5Win 15-min
10-yr 7.88 6.31 5.32 3.85
25-yr 8.86 7.05 5.96 4.41
50-yr 9.50 7.57 6.39 4.82
100-yr 10.10 8.06 6.79 5.20
Tc
Drainage Storm Rainfall
Pipe No. C Kerby Kirpich Intensity Q(cfs)
Area(ac) Event(yr)
Total Tc Tc Used (in/hr)
L(ft) n s Toy, L(ft) S Tch
1 20.48 0.23 n/a 2220.0 0.017 14.27 14.27 15 25-yr 5.96 28.07
2 1.99 0.45 n/a 500.0 0.008 5.94 5.94 5 25-yr 8.86 7.93
printed: 8/27/2024 4:28 PM Page 1 of 1