HYDRO24752

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 7/11/2005
• Doc Name: 2nd Quarter 2005 Inspection Report
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sedimeat, or Slurry Impouadments
INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: CO-0000221 D.P. 010
FACILITY CONFIGURATION: Cross-Valley Pond
SITE NAME: Pond #010
MINE NAME: Yoast Mine(Seneca Coal Co)
MINE I.D. NO.: CMLRD Permit No. C-94-082
DATE: ~'~"~T,
DATE LAST INSPECTION; ~-~^~~
LOCATION: NW',f NE's, Sec. S, T5N, R87W
LOCATION: 8.5 mi. SE of Hayden, CO
OWNER'S REP.: Gregg Kitchen, Gen Mgr
Circle Or Write In apprOprlBte reapOnae
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Foundation preparation (removal of vegetation, stumps, topsoil; Yes
Lift thickness: 8
Compaction according to approved plan: Yes
Burning (specify extent and location): No
Angle of slope: 3.75:1 upstream, 3.75:1 downstream Total =
*Seepage (specify location, color, and approximate volume)
From underdrain pipes: Y s
At isolated points on embankment slopes: Yes
At natural hillside: Yes
Over widespread areas: Yes
From downstream foundation area: Yes
"Boils" beneath stream or ponded water: Yes
Cracks or scarps on crest: Yes
Cracks or scarps on slope: Yes
Sloughing or bulging on slope: Yes
*Major erosion problems: Yes
Surface movements in valley bottom or on hillside: Yes
*Erosion of toe: Yes
*water impounded against toe: Yes
in.
7.5:1
No
No
NO
No
No
NO
N/A
N/A
N/A
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N/A
N/A
N/A
N/A
N/A
N/A
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N/A
Existing embankment freeboard: (normal = 10.0') ~(~ feet
Increase Decrease in water level: l~o~t:_ feet
Cracks, bulging, or erosion on upstream face: Yes ® N/A
Visible sumps or sinkholes in slurry surface: N/A
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
Yes No N/A
N/A
N/A
Yes ©o N/A
N/A
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.