2014-04-03_HYDROLOGY - C1982057

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 4/3/2014
• Doc Name: 1st Quarter 2014 Sedimentation Inspection Reports ‎(emailed)‎
• From: Seneca Coal Company
• 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
Yes
NPDES I.D. NO.: CO- 0000221 D.P. 005
_
Lift thickness:
12in.
FACILITY CONFIGURATION: Cross - Valley Pond
DATE LAST
INSPECTION:
11/7/13
SITE NAME: Pond #005
LOCATION:
NWY4 SWI /., Sec _
10,
TSN, R88W
MINE NAME: Seneca II -W Mine (Seneca Coal Co)
LOCATION:
8 mi. S of Hayden,
CO
MINE I.D. NO.: CMLRD Permit No. C -82 -057
OWNER'S REP.: Roy Karo,
Gen
Mar
Circle or write in appropriate response
1.
Foundation preparation (removal of vegetation, stumps, topsoil:
Yes
2.
_
Lift thickness:
12in.
3.
Compaction according to approved plan:
Yes
4.
Burning (specify extent and location):
No
5.
Angle of slope: 3.5:1 upstream, 2.5:1 downstream Total =
6:1
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 = 7.41)
7.4
feet
15.
X Increase Decrease in water level:
0
feet
16.
Cracks, bulging, or erosion on upstream face:
Yes
No
N/A
17.
Visible sumps or sinkholes in slurry surface:
N/A
18.
*Clogging
Spillway channels and pipes:
Yes
No
N/A
Decant system: Inoperable
Yes
Ne —i:7A
Diversion ditches:
N/A
19.
*Cracking or crushing of pipes
Spillway pipes:
Yes
No
N/A
Decant system: Inoperable
Yee
New
20.
Trash racks clear and in place:
Yes
No
N/A
21.
Discharge rate (gpm)
_7,93
*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.
Inspection Category Comments - 005
SKETCH