2010-01-11_HYDROLOGY - C1994082 ‎(3)‎

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/11/2010
• Doc Name: 4th Quarter 2009 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 Impoundments
INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: CO-0000221 D.P. 013
FACILITY CONFIGURATION: Cross-Valley
SITE NAME: Pond #013
MINE NAME: Yoast Mine(Seneca Coal Cc)
MINE I.D. NO.: CMLRD Permit No. C-94-082
DATE : 10- ? - 0 ?
DATE LAST INSPECTION: u r ``` _ c 1
LOCATION: SEY4 NWY44,Sec. 19, 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
in.
Lift thickness.
Compaction according to approved plan:
Burning (specify extent and location): No
Angle of slope: 3:1 upstream, 3:1 downstream Total =
*Seepage (specify location, color, and approximate volume)
From underdrain pipes: N/A
At isolated points on embankment slopes: Yes o
At natural hillside: Yes No
over widespread areas: Yes No
From downstream foundation area: .SEE D Y€ No
"Boils" beneath stream or ponded water: Yes NNO
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: -See e No
*Erosion of toe: o -5 Yes No
*Water impounded against toe: Yes No
Existing embankment eeboard: (normal = 41)
pr 5sC feet
,
Increase Decrease in water level: feet
Cracks, bulging, or erosion on upstream face: Yes OZ5
Visible sumps or sinkholes in slurry surface: N/A
6:1
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
*Clogging
Spillway channels and pipes:
Yes
N?
N/A
Decant system: N/A
Yes
N/A
Diversion ditches: LV
*Cracking or crushing of pipes
Spillway pipes: Yes Q o)
Decant system: N/A
Trash racks clear and in place: Yes No N/A
Discharge rate (gpm) 0-;,AA? lcae-t 1-4 .5 ea
*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,
volumeetc.) in the space on the back of this sheet.
Pond