2013-05-14_HYDROLOGY - C1994082

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 5/14/2013
• Doc Name: 1st Quarter 2013 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JLE
• Email Name: SB1
• 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
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DATE: , ��-
DATE LAST INSPECTION: `�- ' Z
LOCATION: NEl /, SW� /,,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
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, 2.8:1 downstream
*Seepage (specify location, color, and approximate volume)
Yes
8 in.
Yes
No
��E
Total = 5.8:1
From underdrain pipes:
Yes
No
At isolated points on embankment slopes:
Yes
No
At natural hillside:
Yes
No
Over widespread areas:
Yes
No
From downstream foundation area:
Yes
No
"Boils" beneath stream or ponded water:
Yes
No
Cracks or scarps on crest:
Yes
No
Cracks or scarps on slope:
Yes
No
Sloughing or bulging on slope:
Yes
No
*Major erosion problems:
Yes
No
Surface movements in valley bottom or on hillside:
No
*Erosion of toe:
Yes
No
*Water impounded against toe:
Yes
Existing embankment freeboard: (normal = 5.11)
P14
Increase Decrease in water level:
feet
Cracks, bulging, or erosion on upstream face: Yes 9
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)
N/A
N/A
N/A
N/A
N/A
N/A
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Yes N/A
N/A
N/A i 1
Yes Pik N/A
N/A
No N/A
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*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.
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