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 148
Time of Concentration (SCS)
Curve Number: 62
Length of Flow: 2441.67 ft
Average Land Slope: 2.12 %
Time of Concentration: 1.222 hrs, 73.3 mins
Graphical Peak Discharge
Project: New Horizon Mine By: JSS
Location: C148 Checked:
1. Data:
Tue Mar 15 13:56:49 2016
Date: 03/15/16
Date:
Drainage area: .................... A = 46.8719Acres
Runoff Curve Number: ............. CN = 62
Time of Concentration: ........... Tc = 1.22
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............ = 1.2258
5. Compute la/P....................... = 0.5108
6. Unit peak discharge, qu...... csm/in = 145.94
7. Runoff,Q.........................in = 0.1888
8. Pond & swap adjustment factor .... Fp = 1.00
9. Peak Discharge,gp...............cfs = 2.0178
Culvert 150
This 24" CMP carries flow from the Morgan property under BB Road to Enstrom Draw. The
design for this culvert is located in Attachment 2.05.3(3)-27.
Culvert 155
These 2 - 6" HDPE pipes are temporary and will be removed after construction of Pond 016.
These pipes convey flow from the Tailwater Ditch which will be routed to Pond 016 after it is
constructed. The watershed area for the Tailwater Ditch has been modeled in the Pond 016
design which is included in Attachment 2.05.3(3)-29.
Attachment 2.05.3(3)-1 Page 54 June 2016 (TR -73)