2009-10-29_HYDROLOGY - C1994082 ‎(2)‎

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/29/2009
• Doc Name: 3rd Quarter 2009 DMRS
• From: Seneca Coal Company
• To: DRMS
• Email Name: DTM
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: CO-0000221 D.P. 011
FACILITY CONFIGURATION: Cross-Valley
SITE NAME: Pond #011
MINE NAME: Yoast Mine(Seneca Coal Cc)
MINE I.D. NO.: CMLRD Permit No. C-94-082
DATE :
DATE LAST INSPECTION: G ' ^ 0
LOCATION: NEV. SWl/,,Sec. 16, TSN, R87W
LOCATION: 8.5 mi. SE of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
Circle or write in appropriate response
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Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness: 8
Compaction according to approved plan: Yes
Burning (specify extent and location): No
Angle of slope: 3.0:1 upstream, 2.8:1 downstream Total =
*Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes
At isolated points on embankment slopes: Yes
At natural hillside: Yes
Over widespread areas: Yes
From downstream foundation area: Yes
"Boils" beneath stream or ponded water: Yes
Cracks or scarps on crest: Yes
Cracks or scarps on slope: Yes
Sloughing or bulging on slope: Yes
*Major erosion problems: Yes
Surface movements in valley bottom or on hillside: Yes
*Erosion of toe: Yes
*Water impounded against toe: Yes
in.
5.8:1
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Existing embankment freeboard: (normal = 5.11) feet
Increase (/ Decrease in water level: feet
cracks, bulging, or erosion on upstream face: Yes No
visible sumps or sinkholes in slurry surface: N/A
*Clogging
Spillway channels and pipes: Yes 0
Decant system: N/A
Diversion ditches: N/A
*Cracking or crushing of pipes
Spillway pipes: Yes
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Decant system: N/A
20. Trash racks clear and in lace: Yes No N/A
21. Discharge rate (gpm)
*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.
Pond