SW6240105_Design Calculations_20240424 (10)

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
2000-Elyse Meadows Subdivision
Rainfall Intensity
Storm Event 5 in 15-min
10-yr 7.72 6.17 5.20 3.77
25-yr 8.63 6.87 5.81 4.30
50-yr 9.25 7.37 6.22 4.69
100-yr 9.85 7.83 6.60 5.05
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 Teh
1 DERIVED FROM SIR n/a n/a 0.00 5 25-yr 8.63
2 38.80 0.40 n/a 2960.0 0.030 14.17 14.17 15 25-yr 5.81 90.17
3 21.50 0.40 n/a 2960.0 0.030 14.17 14.17 15 25-yr 5.81 49.97
4 0.21 0.30 n/a 380.0 0.020 3.41 3.41 5 25-yr 8.63 0.56
5 1.49 0.45 n/a 460.0 0.027 3.54 3.54 5 25-yr 8.63 5.79
6 1.32 0.45 n/a 640.0 0.022 4.88 4.88 5 25-yr 8.63 5.13
7 1.28 0.45 n/a 550.0 0.029 3.91 3.91 5 25-yr 8.63 4.97
8 6.49 0.45 n/a 930.0 0.020 6.83 6.83 5 25-yr 8.63 25.20
printed:4/24/2024 7:23 AM Page 1 of 1