2016-08-24_PERMIT FILE - C1981008A ‎(4)‎

• Permit No: C1981008A
• IBM Index Class Name: Permit File
• Doc Date: 8/24/2016
• Doc Name: Collection/Diversion Ditches and Culverts Design Parameters
• Section_Exhibit Name: Section 2.05.3‎(3)‎ Attachment 2.05.3‎(3)‎-1
• Media Type: D
• Archive: Yes

Culvert 134
Time of Concentration (SCS)
Curve Number: 73
Length of Flow: 2384.89 ft
Average Land Slope: 3.24 %
Time of Concentration: 0.725 hrs, 43.5 mins
Graphical Peak Discharge
Project: New Horizon Mine By: JSS
Location: C134 Checked:
1. Data:
Tue Mar 15 10:20:58 2016
Date: 03/15/16
Date:
Drainage area: .................... A = 9.3072Acres
Runoff Curve Number: ............. CN = 73
Time of Concentration: ........... Tc = 0.72
Storm Type: ....................... = II
Pond and swamp areas spread
throughout watershed ............... = 0.00 percent of A
0.0000 Acres
2. Frequency ........................yr = 25
3. Rainfall,P(24-hour).............. in = 2.40
4. Initial abstraction, Ia............ = 0.7397
5. Compute Ia/P....................... = 0.3082
6. Unit peak discharge, qu...... csm/in = 355.40
7. Runoff,Q.........................in = 0.5144
8. Pond & swap adjustment factor .... Fp = 1.00
9. Peak Discharge,gp...............cfs = 2.6585
Attachment 2.05.3(3)-1 Page 45 June 2016 (TR -73)