2011-07-28_HYDROLOGY - C1994082

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 7/28/2011
• Doc Name: 2nd Quarter 2011 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: SLB
• Email Name: SB1
• Media Type: D
• Archive: No

INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: CO- 0000221 D.P. 014
FACILITY CONFIGURATION: Cross - Valley Pond
SITE NAME: Pond #014
MINE NAME: Yoast Mine(Seneca Coal Co)
MINE I.D. NO.: CMLRD Permit No. C -94 -082
20. Trash racks clear and in place:
21. Discharge rate (gpm)
PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
DATE: v - - I '
Circle or write in appropriate response
DATE LAST INSPECTION: 3"2
LOCATION: NEl /a SWU, Sec . 19, T5N, R87W
LOCATION: 8.5 mi. SE of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
1. Foundation preparation (removal of vegetation, stumps, topsoil:
2. Lift thickness:
3. Compaction according to approved plan:
4. Burning (specify extent and location):
5. Angle of slope: 3.0:1 upstream, 3.5:1 downstream
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment slopes:
At natural hillside:
Over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
Yes
Yes
No
Total = 6.5:1
N/A
Yes
Yes
Yes
Yes
Yes
7. Cracks or scarps on crest: Yes
8. Cracks or scarps on slope: Yes
9. Sloughing or bulging on slope: Yes
10. *Major erosion problems: Yes
11. Surface movements in valley bottom or on hillside: Yes
12. *Erosion of toe: Yes
13. *Water impounded against toe: Yes
14. Existing embankment freeboard: (normal = 5.0') s feet
15. VIncrease Decrease in water level:
16. Cracks, bulging, or erosion on upstream face: Yes Ta N/A
17. Visible sumps or sinkholes in slurry surface:
18. *Clogging
Spillway channels and pipes: Yes 614, N/A
Decant system: N/A
Diversion ditches: N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes a N/A
Decant system: A
•
•
No
N
0
0
0
feet
N/A
in.
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
No N/A
0
*Major adverse changes in these items could cause instability and should be reported to
the Engineering Manager and Mine Superintendent for further evaluation. Adverse
conditions noted in these items should normally be described (extent, location, volume,
etc.) in the space on the back of this sheet.