SW6230901_Design Calculations_20231115 (3)

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
1960-Royal Farms Ph II
Rainfall Intensity
Storm Event 5 in 15-min
10-yr 7.94 6.35 5.36 3.88
25-yr 8.92 7.1 6 4.45
50-yr 9.64 7.67 6.47 4.88
100-yr 10.3 8.21 6.92 5.3
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 2.90 0.40 n/a 600.0 0.003 10.06 10.06 10 25-yr 7.1 8.24
2 2.98 0.45 n/a 1100.0 0.005 13.18 13.18 15 25-yr 6 8.05
printed: 11/15/2023 7:11 AM Page 1 of 1