2014-04-02_HYDROLOGY - C1994082

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 4/2/2014
• Doc Name: 1st Quarter 2014 Sedimentation Inspection Reports ‎(emailed)‎
• From: Seneca Coal ompany
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JHB
• Email Name: DIH
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Chris Miller DATE: 3 -21 -14
NPDES I.D. NO.: CO- 0000221 D.P. 010
FACILITY CONFIGURATION: Cross - Valley Pond DATE LAST INSPECTION: 11 -8 -13
SITE NAME: Pond #011 LOCATION: NE1 /. SW1 /<,Sec. 16, T5N, R87W
MINE NAME: Yoast Mine(Seneca Coal Co) LOCATION: 8.5 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C -94 -082 OWNER'S REP.: Roy Karo, Gen Mgr
Circle or write in appropriate response
1.
Foundation preparation (removal of vegetation, stumps, topsoil:
Yes
2.
Lift thickness:
8 in.
3.
Compaction according to approved plan:
Yes
4.
Burning (specify extent and location):
No
S.
Angle of slope: 3.0:1 upstream, 2.8:1 downstream
Total =
5.8:1
6.
*Seepage (specify location, color, and approximate volume)
From underdrain pipes:
Yes
No
N/A
At isolated points on embankment slopes:
Yes
No
N/A
At natural hillside
Yes
No
N/A
Over widespread areas:
Yes
No
N/A
From downstream foundation area:
Yes
No
N/A
"Boils" beneath stream or ponded water:
Yes
No
N/A
7.
Cracks or scarps on crest:
Yes
No
N/A
8.
Cracks or scarps on slope:
Yes
No
N/A
9.
Sloughing or bulging on slope:
Yes
No
N/A
10.
*Major erosion problems:
Yes
No
N/A
11.
Surface movements in valley bottom or on hillside:
Yes
No
N/A
12.
*Erosion of toe:
Yes
No
N/A
13.
*Water impounded against toe:
Yes
No
N/A
14.
Existing embankment freeboard: (normal = 5.1')
15
feet
15.
Increase Decrease in water level: no change
2 feet
16.
Cracks, bulging, or erosion on upstream face
Yes
No
N/A
17.
Visible sumps or sinkholes in slurry surface:
Yes
No
N/A
18.
*Clogging
Spillway channels and pipes:
Yes
No
N/A
Decant system:
Yes
No
Diversion ditches:
Yes
No
19.
*Cracking or crushing of pipes
Spillway pipes:
Yes
No
N/A
Decant system:
Yes
No
20.
Trash racks clear and in place:
Yes
No
N/A
21.
Discharge rate (gpm)
p
*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