2008-08-04_HYDROLOGY - C1994082

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 8/4/2008
• Doc Name: 2nd Quarter 2008 Sedimentation Pond Inspection Report
• 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 Impou
ndments
.01
INSPECTOR'S NAME: Dennis Jones DATE: 6 -) 1 O- o v
NPDES I.D. NO.: CO-0000221 D.P. 013 ?? O S(
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: UU
SITE NAME: Pond #013 LOCATION: SETA NWY4,Sec. 19, T5N, 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.: Gregg Kitchen, Gen Mar
Circle or write in aoorolpriate response
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Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 3:1 upstream, 3:1 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:
Cracks or scarps on crest:
Cracks or scarps on slope:
Sloughing or bulging on slope:
*Major erosion problems:
Surface movements in valley bottom or on hillside: Ede- oJ S;
*Erosion of toe:
*Water impounded against toe:
Existing embankment reeboard: (normal = 41)
Increase Decrease in water level:
in.
No
Total = 6:1
_ NA
Yes No
Yes No
Yes No
Yes NNo
Yes Yes Yes Yes Yes Yes No
Yes ffcc)
Yes feet
f eet
Cracks, bulging, or erosion on upstream face: Yes No
Visible sumps or sinkholes in slurry surface: N/A
*Clogging ???
Spillway channels and pipes: Yes ll
Decant system: N/A
Diversion ditches: Yes No
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19. *Cracking or crushing of pipes
Spillway pipes: Yes N/A
Decant system: N/A
20. Trash racks clear and in place: Yes C? N/A
21. Discharge rate (gpm) Lo .1A -ems (eu aA d-), Jw ; Sc. ".k
*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.