1984-08-20_REVISION - C1981012

• Permit No: C1981012
• IBM Index Class Name: Revision
• Doc Date: 8/20/1984
• Doc Name: NEW ELK MINOR REVISION 2 TO WYOMING FUEL COS NEW ELK PERMIT REVISION 1 NEW ELK PN C-012-81
• From: WYOMING FUEL CO
• To: MLRD
• Type & Sequence: MR2
• Media Type: D
• Archive: No

RECEIVED
•
lJ
Watershed Characteristics:
Watershed No. 1
Drainage Area =
Average Watershed Slope =
Curve Number (CN) _
10 year 24 hour Event =
10 year 24 hour Peak Discharge =
Watershed No. 2
Drainage Area =
Average Watershed Slope =
Curve Number (CN) _
10 year 24 hour Event =
10 year 24 hour Peak Discharge =
Watershed No. 3
Drainage Area =
Average Watershed Slope =
Curve Number (CN) _
10 year 24 hour Event =
10 year 24 hour Peak Discharge =
Watershed No. 4
Drainage Area =
Average Watershed Slope =
Curve Number (CN) _
10 year 24 hour Event =
10 year 24 hour Discharge =
Culvert Sizing:
AU G 2 0 1984
1.90 acres MINED LANG RECLAMATION DIVISIDN
37% Colo. Dept. of Natural Resources
80
2.9 inch
4.8 CFS X 2.9 inch = 13.9 CFS
inch
0.45 acres
30%
80
2.9 inches
1 CFS X 2.9 inch = 2.9 CFS
inch
0.87 acres
35%
80
2.9 inch
2.S CFS X 2.9 inch = 7.25 CFS
inch
32.3 acres
50%
80
2.9 inch
41 CFS X 2.9 inch = i 18.9 CFS
inch
At STA 0 + 00
Q Peak =Watershed 1 = 13.9 CFS
From Figure 17-30 Ven Te Chow "OPEN CHANNEL HYDRAULICS"
Culvert Size for H = 1 Q = 13.9 CFS
a
- Use a 24 inch Q CMP
u
At STA 0 + 90
Q Peak =Watershed 2 = 2.9 CFS
H = 1 Q= 2.9 CFS
a
- Use a 18 inch Q CMP