SW6241002_Design Calculations_20241118 (2)

Marsh En ineerin_ Services 111111111111111111
PIPE CALCULATIONS
NOTE:sheet can only handle Tc from 5 to 30 min
Cross-pipes to use 25-yr storm intensity
PROJECT 9=POWD E I" HORN SU It DIVISION
Rainfall Tn tensity
Storm
Ev 5-min 10-min 15-min 30-min
10-yr• 7.96 6.36 5.36 3.88
25-yr 8.88 7.07 5.98 4.43
50-yr • 9.59 7.63 6.44 4.85
100-yr 10.30 8.15 6.87 5.26
Tc Rainfall
Pipe No. Drainage C Kirpich Storm Intensity Q(cfs)
Area(ac) T Used Event(yr)
L(ft) S Tch (in/hr)
1 5.11 0.30 703 0.0171 5.82 5 25-yr 8.88 13.61
2 1.14 0.45 480 0.0183 4.22 5 25-yr 8.88 4.56
3 #DIV/0! N/A #VALUE! 25-yr #VALUE! #VALUE!
4 #DIV/0! N/A #VALUE! 25-yr #VALUE! #VALUE!
5 #DIV/0! N/A N/.' 25-yr 0 0.00
6 #DIV/0! N/A N/A 25-yr 0 0.00
7
8 #DIV/0! N/A N/A 25-yr 0 0.00
9 #DIV/0! N/A N/A 25-yr 0 0.00
10 #DIV/0! N/A N/A 25-yr 0 0.00
11 #DIV/0! N/A N/A 25-yr 0 0.00
12 #DIV/0! N/A N/A 25-yr 0 0.00
13 #DIV/0! N/A N/A 25-yr 0 0.00
14 #DIV/0! N/A N/A 25-yr 0 0.00
15 #DIV/0! N/A N/A 25-yr 0 0.00
16 #DIV/0! N/A N/A 25-yr 0 0.00
17 #DIV/0! N/A N/A 25-yr 0 0.00
18 #DIV/0! N/A N/A 25-yr 0 0.00
19 #IPt IV/0! N/A N/A 25-yr 0 0.00
20 #DIV/0! N/A N/A 25-yr 0 0.00