2007-11-30_HYDROLOGY - C1994082

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/30/2007
• Doc Name: 4th Quarter 2007 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Media Type: D
• Archive: No

.,~
PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: CO-0000221 D.P.
FACILITY CONFIGURATION: Cross-Val
SITE NAME: Pond #010
MINE NAME: Yoast Mine (Seneca Coal
MINE I.D. NO.: CMLRD Permit No. C
DATE: ~Q'_~ .®~
010 ~ I ~ ®~
1ey Pond DATE LAST INSPECTION: V
LOCATION: NWl/, NEl/, Sec . 8 , TSN, R87W
Co) LOCATION: 8.5 mi. SE of Hayden, CO
-94-082 OWNER'S REP.: Grego Kitchen, Gen Mgr
Circle or write in appropriate response
1
2
3
4
5
6
7.
8.
9.
10
11
12
13
14
15
16
17
18
19
Foundation preparation (removal of vegetation, stumps, topsoil: _
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 3.75:1 upstream, 3.75:1 downstream
*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:
Existj~ng embankment freeboard: (normal = 10.0')
_ / Increase Decrease in water level:
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in slurry surface:
*Clogging
Spillway channels
Decant system: _
Diversion ditches:
*Cra.cking or crushing of
pipes
_ Yes
8
_ Yes
No
Total =
in.
7.5:1
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
es
Yes No
Yes No
Yes No
Yes No
Yes No
~_ feet
~• I_ feet
Yes C1Qaj
NL
Yes 1V
N A
Spillway pipes: Yes
Decant system: t~ N L
20 . Trash racks clear and in place : _~{~, Cv' t-t tc~ es No
21. Discharge rate (gpm)
and pipes:
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A ~ 7
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
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.