2008-01-28_PERMIT FILE - C1992080A

• Permit No: C1992080A
• IBM Index Class Name: Permit File
• Doc Date: 1/28/2008
• Section_Exhibit Name: APPENDIX 5-2 SEDIMENT POND CONTROL DESIGN
• Media Type: D
• Archive: Yes

SEDIMENT CONTROL DESIGN
CARBON JUNCTION MINE
OARRIDGE ENERGY, INC.
•
NAME OF BTRUCTURE: West Collection Ditch
TYPE OF STRUCTURE: Disturbed runoff collection.
LOCATION: West of fill and topsoil pile No. 2.
BTORM TYPE: 10 yr. 24 hr. event.
BABIC DATA
1. PRECIPITATION EVENT:
2. WEIGHTED SOILS COMPLEX NO:
3. LENGTH:
4. AREA:
5. SLOPE:
6. HYDRAULIC LENGTH:
7. RUNOFF:
8. TIME CONCENTRATION, HOUR
9. PEAK DISCHARGE PER UNIT:
10. TOTAL PEAK DISCHARGE:
STRUCTURE DESIGN
1. LENGTH:
2. WIDTH:
3. HEIGHT:
4. FLOW DEPTH AT PEAK DISCHARGE:
5. SAFETY FACTOR, BOTTOM:
6. SAFETY FACTOR, SIDES:
7. WALL SLOPE:
8. VELOCITY:
9. D/50:
10. VOLUME:
11. DIAMETER:
12. TIME OF DETENTION:
13. DESIGN:
2.25 in.
88
1300 ft.
0.03
3$
1300 ft.
1.17 in.
.Ofi5
1000 cfs/in/sgmi.
36.56
1300 ft.
n/a
1V:3H
1.45 ft.
n/a
n/a
1V:3H
8.59 fps
n/a
n/a
n/a
n/a
2.0 ft.
DESIGN: Ditch 2.0 feet deep with 1V:3H side slopes.
•