2009-10-29_HYDROLOGY - C1982057 ‎(2)‎

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/29/2009
• Doc Name: 3rd Quarter 2009 Sedimentation Pond Inspection
• 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. 015
FACILITY CONFIGURATION: Cross-Valley Pond
SITE NAME: Pond #015
MINE NAME: Seneca II-W Mine (Seneca Coal Cc)
MINE I.D. NO.: CMLRD Permit No. C-82-057
DATE : 3 ' H - o c(
DATE LAST INSPECTION: 6
LOCATION: NEV44 SEl/,, Sec. 23, TSN, R88W
LOCATION: 8 mi. S of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
Circle or write in appropriate response
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N/A
6:1
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes N N/A
es o N/A
Yes No N/A
Yes No N/A
feet
feet
Yes No N/A
N/A
Yes Too N/A
N/A
N/A
Yes No N/A
N/A
Y//eAAS 1 N/A
*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.
Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness: 12
Compaction according to approved plan: Yes
Burning (specify extent and location): No
Angle of slope: 2.5:1 upstream, 3.5:1 downstream Total =
*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:,5610-cf1%CAr.vJ7C
*Erosion of toe:
*Water impounded against toe:
Existing embankment freeboard: (normal = 4.01)
Increase Decrease in water level: V,0 ?w y
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in slurry surface:
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
Discharge rate (gpm)