HYDRO20123

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 7/16/1997
• Doc Name: 2nd Qtr 1997 Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

INSPECTOR'S NAME: Michael
NPDES I.D. NO.: CO-0000.
FACILITY CONFIGURATION: C
SITE NAME: South Section
MINE NAME: Seneca II Mine
MINE I.D. NO.: CMLRD Perm
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P&RIODIC INSP&CTION FORM
Water, Sediment, or Slurry Impoundments
Altavilla DATE: 06/27/97
Z21 D.P. 004
Coss-Valley Pond DATE LAST INSPECTION: 03/17/97
12 Pond #004 LOCATION: SWy. SES:. Sec. 12. TSN. R87W
(Seneca Coal Col LOCATION: 7.1 mi. SE of Hayden, CO
1t No. C 80-005 OWNER'S REP.: Brad Brown. Gen Mar
Circle or write in aonronriate response
Foundation preparation (removal of vegetation, stumps, topsoil: es No N/A
Lift thickness: 12 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:
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:
*Erosion of toe:
*Water impounded against toe:
Existing embankment freeboard: See comments
Increase Decrease in water level: No chanoe
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:
Yes N/A
Yes N/A
Yes N/A
Yes o N/A
Yes N/A
Yes N/A
Yes o N/A
Yes ~ N/A
Yes ~ N/A
Yes ~ N/A
Yes ®o N/A
Yes ~ N/A
Yes o N/A
5.8 feet
_ feet
Yes ® N/A
Yes No N/A
Yes N/A
Yes ~ N A
Yes o /
Yes (l7C'o~ N/A
Yes ~~ N/A
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 Eurther evaluation. Adverse conditions noted
in these items should normally be described (extent, location, volume, etc.) in the space on
the back of this sheet.