2012-08-30_HYDROLOGY - C1982057 ‎(2)‎

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 8/30/2012
• Doc Name: 2nd Quarter 2012 Sedimentation Ponds
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: SLB
• Email Name: SB1
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: 6-4 ' 2 -
NPDES I.D. NO.: CO- 0000221 D.P. 016
FACILITY CONFIGURATION: Cross - Valley Pond DATE LAST INSPECTION: l� �1 ( Z
SITE NAME: Pond #016 LOCATION: NE SE %, Sec. 27, T5N, 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 Mgr
1.
2.
3.
4.
12.
13.
14.
15.
16.
17.
18.
Circle or write in appropriate response
Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness:
Compaction according to approved plan: Yes
Burning (specify extent and location): No
3:1 downstream Total = 6:1
5. Angle of slope: 3:1 upstream,
6. *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:
7. Cracks or scarps on crest:
8. Cracks or scarps on slope:
9. Sloughing or bulging on slope:
10. *Major erosion problems:
11.
Surface movements in valley bottom or on hillside:
*Erosion of toe:
*Water impounded against toe:
Existing embankment freeboard: (normal = 6.8')
r v- L.> ve, 6) L'v )
N/A
Yes N/A
No N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Yes • N/A
Yes • N/A
6.c feet
feet
Yes Nf N/A
N/A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Increase Decrease in water level:
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in slurry surface:
*Clogging
Spillway channels and pipes: Yes Na N/A
Decant system: N/A
Diversion ditches: N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes N/A
Decant system: N/A
20. Trash racks clear and in place: (Ye No N/A
21. Discharge rate (gpm)
13
in.
No
No
No
No
No
,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 space on the
back of this sheet.
5 s_