HYDRO30163

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 3/9/2000
• Doc Name: 4th Qtr 1999 Sediment Pond 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: Mi ha ~ Al av'1 a DATE: 12/30/99
NPDES I.D. NO.: CO-0000221 ^_P_ 0 10
FACILITY CONFIGURATION: Cross-Valle y Pond DATE LAST INSPECTION: 09/22/99
SITE NAME: Pond X010 LOCATION: NW3r NEiy Sec. S TSN R87W
MINE NAME: Yoae M+ne(c n a .oal - oi LOCATION: 8.5 mi. SF of Ha_y~n, cO
MINE I.D. NO.: CMr.Rn P m+ No. -Q 4-08 OWNER'S REP.: Brad Brown Cen Mgr
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Anqle of slope: 3.75:1 upstream, "±_75:1 downstream
*Seepage (specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment elopes:
At natural hillside:
Over widespread areas:
From downstream foundation area:
"BOile" beneath stream or ponded water:
Cracks or scarps on crest:
Cracks or scarps on elope:
Sloughing or bulging on elope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Eroeion of toe:
*Water impounded against toe:
Existing embankment freeboard: A~oroximately
~ 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:
Diversion ditches:
19
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
20
Trash racks clear and in place:
Yee o
Yee o
Ye9
Yee
Yes
Yee
Yes o
Yee o
Yee o
Yee o
Yee ©o
Yee o
Yea No
9.9 feet
N/A
N/A
N A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/R
N/A
N/A
N/A
D.1 feet
Yes N® N A
Yes No N/A
Yea ® N/A
Yes No
Yes No
Yes 0° N/A
Yes No
Yea No
•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 apace on the back of this sheet.
es No
in
es No
Yee No
Total = 7.5:1