2008-08-04_HYDROLOGY - C1982057 ‎(2)‎

• Permit No: C1982057
• 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 Impoundments
D Jones DATE: G -3-©?y/
v
INSPECTOR S NAME. ennis
NPDES I.D. NO.: CO-0000221 D.P. 015 -Q
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION:
SITE NAME: Pond #015 LOCATION: NE1/a SE'/a Sec. 23, TSN, R88W
MINE NAME: Seneca II-W Mine (Seneca Coal Cc) LOCATION: 8 mi. S of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Gre(Tq Kitchen, Gen Mar
Circle or write in apipropriate response
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Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 2.5:1 upstream, 3.5:1 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: 5ee odl?n 5?
*Erosion of toe:
*Water impounded against toe:
Existing embankment freeboard: (normal = 4.01)
Increase Decrease in water level:
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)
Total
N/A
Yes
12
Yes
No
6.1
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Yes No N/A
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G No N/A
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feet
feet
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Yes (No) N
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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.