PERMFILE60630

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 3/13/2006
• From: pg 2.05.3‎(3)‎-10-76 to End
• Section_Exhibit Name: NH2 Section 2.05.3‎(3)‎ Attachment 2.05.3‎(3)‎-10 Part 2
• Media Type: D
• Archive: Yes

i CULVERT A-11 BASIN 20
Time of Concentration (SCS Method)
Curve Number: 79
Length of Flow (ft): 782.75
Average Land Slope (): 2.9
Time of Concentration (hrs): 0.26
08/07/1999

Graphical Peak Discharge
Project: AMENDMENT By: GL
Location: CULVERT A-11 Checked:
Developed
1. Data:
Drainage area :....................A = 10.4700 Acres
Runoff Curve Number :.............CN = 79
Time of Concentration:...........Tc = 0.26
Pond and swamp are
2. Frequency ...............
3. Rainfall,P(24-hour)..
4. Initial abstraction, la,
5. Compute la/P..........
08/07/1999
Date: 08/07/99
Date:
as spread throughout watershed. = 5.00 percent of A
0.5235 Acres
........yr = 10
...........in = 2.00
........... = 0.5316
............ = 0.2658
6. Unit peak discharge, qu......csm/in = 641.39
7. Runoff,Q .........................in = 0.5225
8. Pond & swap adjustment factor,...Fp = 0.75
9. Peak Discharge,gp ...............cfs = 4.1117
(REVISED 12/00)
Attachment 2.05.3(3) -10-116