PERMFILE42263

• Permit No: C1981020
• IBM Index Class Name: Permit File
• Doc Date: 1/20/2004
• Section_Exhibit Name: Appendix M‎(i)‎ to M‎(v)‎ Hydrologic Data
• Media Type: D
• Archive: No

w.o. 2937
SHERIDAN ENTERPRISES - LOMA LOAL PROJECT
DRAINAGE CALCULATIONS
Starting at the uppermost pipe
Basin Lontributory to 48" 0 Pipe
Area - 68.9 AC.
Time of Concentration - Nomograph
H - 6900-5700 - 1200
L - 3500
Tc - 6.5 Mln.
t - 0.4 In./H r.
Q - CiA - (0.4)(0.4)(68.9) - 11.0 cfs
Capacity of 48" 0 CMP.
Q = .0^061 s} D8/3 = 77 cfs
where n - .024
s = .O1 (assumed)
Basin Contributory to first 18" 0 Pipe
Area - 35.6 AC.
Time of Concentration - Nomograph
H 6525-5680 = 845
L - 2500
Tc - 5 Min.
i - 0.4 In./Hr.
Q - CiA - (0.4)(0.4)(35.6) = 5.7 cfs
Capacity of 18" 8
Q - .0^061 s} D8/3 - 5.7 efs '
Basin Lontributory to second 18" 0 Pipe
Area - 3.7 AC. 18" 0 has adequate capacity.
Basin Contributory to third 18" 0 Pipe
Area - 22.7 AC
Tc = 60 Min.
i - 0.8 In./H r.
Q - CTA = (0.4)(0.8)(22.7) 7.2 cfs 18" 0 pipe has adequate capacity.
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