2009-08-03_HYDROLOGY - C1994082

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 8/3/2009
• Doc Name: 2nd Quarter 2009 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: DTM
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: 6- 9 `-O-1
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 0%
SITE NAME: Pond #011A LOCATION: Sinn/4 NWl/, Sec. 16, TSN, R87W
MINE NAME: Yoast Mine(Seneca Coal Co) LOCATION: 8.5 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-94-082 OWNER'S REP.: Roy Karo, Gen Mar
Circle or write in appropriate resvonse
1.
2.
3.
4.
5.
6.
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: _ 3.0:1 upstream, 3.0:1 downstream
*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
in.
Yes
No
Total = 6.0:1
N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
7. Cracks or scarps on crest: Yes N/A
8. Cracks or scarps on slope: Yes N/A
9. Sloughing or bulging on slope: Yes N/A
10. *Major erosion problems: Yes U N/A
11. Surface movements in valley bottom or on hillside: Yes N/A
12. *Erosion of toe: _ Yes No N/A
13. *Water impounded against toe: Yes N/A
14. Existing embankment freeboard: (normal = 4.51) S-Iq feet
15. L/ Increase Decrease in water level: 1.3 feet
16. Cracks, bulging, or erosion on upstream face: Yes N/A
17. Visible sumps or sinkholes in slurry surface: N/A
18. *Clogging
Spillway channels and pipes: Yes N/A
Decant system: N/A
Diversion ditches: N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes CD
Decant system: N/A
20. Trash racks clear and in place: No
21. Discharge rate (gpm) U) C" QY I e V V-C9.1 f bQ to CQtscL-vSL Q-
vev, y lo") Gtt \u "Ly 1? s siae-p
*Major adverse changes in these items could cause instability and should be reported to
the Engineering Manager and Mine Superintendent for further evaluat ion. Adverse
condi tions noted in these items should normally be described (extent, location, volume,
etc.) in the space on the back of this sheet.