2008-10-24_HYDROLOGY - C1982057 ‎(3)‎

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/24/2008
• Doc Name: 3rd Quarter 2008 Sedimentation Pond Inspection
• 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 DATE: Ct _ a 6 - 01
NPDES I.D. NO.: CO-0000221 D.P. 005
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: b ll??
SITE NAME: Pond #005 LOCATION: NW1/a SW1/, Sec. 10, T5N, R88W
MINE NAME: Seneca II-W Mine (Seneca Coal Co) LOCATION: 8 mi. S of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Greaa Kitchen, Gen Mar
Circle or write in appropriate response
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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: 3.5:1 upstream, 2.5:1 downstream Total =
*Seepage (specify location, color, and apjproximate volume)
From underdrain pipes: IA-C9- J'(aw
At isolated points on embankment s pes:
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:
*Erosion of toe:
*Water impounded against toe:
Existing embankment eeboard: (normal = 7.4')
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: Inoperable
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system: Inoperable
Trash racks clear and in pliace:
Discharge rate (gpm) ia9? ` ??17e r-? t 6<20UJ
in.
6:1
Yes No N/A
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'*0 -01 f eet
l-, feet
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11
le ""r
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Yes No N/A
?Yz^s? Ne-??
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0
*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.