HYDRO31515

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 12/13/2004
• Doc Name: 4th Quarter 2004 Quarterly Sedimentation Pond Inspection Reports
• From: Seneca Coal Company
• 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: Id'a~~~Ll
NPDES I . D . NO .: N A ' ~ ~/
FACILITY CONFIGURATION: incised Pond ~ ^Z O
DATE LAST INSPECTION: O 1
SITE NAME: Truck Wash Supp ly Pond LOCATION: NW'/< NEB/<, Sec. 34 T6N, R87W
MINE NAME: Seneca Mine II (Seneca Coal Co) LOCATION: 7.1 mi. SE of Havden, CO
MINE I.D. NO.: CDMG Permit No. C- 80-005 OWNER'S REP.: Gregg Kitchen, Gen Mar
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Circle Or Write in apprOOrlate reBpOIISe
Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness: 12 inches
Compaction according to approved plan: Yes
Burning (specify extent and location): No
Angle of slope: 2:1 upstream, 2:1 downstream Total = 4 :1
*Seepage (specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment slopes: Yes No N/A
At natural hillside: Yes No N/A
Over widespread areas: Yes o N/A
From downstream foundation area: Yes o N/A
"Boils" beneath stream or ponded water: Yes o N/A
Cracks or scarps on crest: Yes No N/A
Cracks or scarps on slope: Yes No N/A
Sloughing or bulging on slope: Yes o N/A
*Major erosion problems: Yes o N/A
Surface movements in valley bottom or on hillside: Yes No N/A
*Erosion of toe: Yes No N/A
*Water impounded against toe: Yes No N/A
Existing embankment freeboard: (normal = 2.7') 3.7 feet
Increase X Decrease in water level: D •~ feet
Cracks, bulging,~or erosion on upstream face: Yes No N/A
Visible sumps or sinkholes in slurry surface:
*Clogging
Spillway channels and pipes: Yes ~ N/A
Decant system:
Diversion ditches: Yes ~ N/A
*Cracking or crushing o£ pipes
Spillway pipes: Yes No N/A
Decant system:
Trash racks clear and in place:
*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.