HYDRO22266

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 1/2/1997
• Doc Name: 4th Qtr 1997 Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: 12/02/96
NPDES I.D. NO.: CO-0000 221 D.P. 004
FACILITY CONFIGURATION: C ross-Vallev Pond DATE LAST INSPECTION: 09/17/96
SITE NAME: South Section 12 Pond # 004 LOCATION: SWy SEY, Sec. 12. TSN. R87W
MINE NAME: Seneca II Mine (Seneca Coal Co) LOCATION: 7.1 mi. SE of Hayden. CO
MINE I.D. NO.: CMLRD Perm it No. C- 80-005 OWNER'S REP.: Brad Brown. Gen Mar
Circle or write in appropriate response
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Foundation preparation (removal of vegetation, stumps, topsoil: Yes No N/A
Lift thickness: ~~, in. N/A
Compaction according to approved plan: es No N/A
Burning (specify extent and location): Yes No
Angle of slope: 5:1 upstream, 2:1 downstream Total = 7:1 N/A
*Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes o N/A
At isolated points on embankment slopes: Yes N/A
At natural hillside: Yes N/A
Over widespread areas: Yes N/A
From downstream foundation area: Yes N/A
"Boils" beneath stream or ponded water: Yes o N/A
Cracks or scarps on crest: Yes N~ N/A
Cracks or scarps on slope: Yes o N/A
Sloughing or bulging on slope: Yes N N/A
*Major erosion problems: Yes No N/A
Surface movements in valley bottom or on hillside: Yes N/A
*Erosion of toe: Yes ~~
~ N/A
*Water impounded against toe: Yes o N/A
Existing embankment freeboard: See comments 5.8 feet
Increase Decrease in water level: No chance feet
Cracks, bulging, or erosion on upstream face: Yes ~ N A
Visible sumps or sinkholes in slurry surface: Yes No /A
*Clogginq
Spillway channels and pipes: Yes N/A
Decant system: Yes ~ N/A
Diversion ditches: Yes o N/A
*Cracking or crushing of pipes
Spillway pipes: Yes o N/A
Decant system: Yes o N/A
Trash racks clear and in place: es No 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.