2008-08-04_HYDROLOGY - C1980005

• Permit No: C1980005
• IBM Index Class Name: HYDROLOGY
• Doc Date: 8/4/2008
• Doc Name: 2nd Quarter 2008 Sedimentation Pond Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: DTM
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundmen
s

' t
(
S NAME: Dennis Jones
INSPECTOR
NPDES I.D. NO.: CO-0000221 D.P. 004 DATE: y

_ O
3 _-7
FACILITY CONFIGURATION: Cross-Val ley Pond DATE LAST INS PECTION:
SITE NAME: South Section 12 Pond #004 LOCATION: SWV4 SE%, Sec. 12, T5N, R87W
MINE NAME: Seneca II Mine (Seneca Coal Co) LOCATION: 7.1 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C -80-005 OWNER'S REP.: Gregg Kitchen, Gen Mar
Circle or write in appropriate response
1.
2.
3.
4.
5.
6.
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 5:1 upstream, 2:1 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:
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 hill side:
12. *Erosion of toe:
13. *Water impounded against toe:
14. Existing embankment freeboard: (normal = 4.8')
15. Increase Decrease in water level: Kp ??4?.?c1Q
16. Cracks, bulging, or erosion on upstream face:
17. Visible sumps or sinkholes in slurry surface:
18. *Clogging
Spillway channels and pipes:
Decant system: Ino perable
Diversion ditches:
19. *Cracking or crushing of pipes
Spillway pipes:
Decant system: Inop erable
20. Trash racks clear and in place:
21. Discharge rate (gpm)
Yes
12
Yes
No
Total
N
7:1
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes N N/A
Yes U N/A
Yes No N/A
IA feet
feet
Yes (M) N/A
N/A
Yes ® N/A
IYEe9 Ne-arcs
Yes (? N/A
Yes 0 N/A
Yes Ne-Pill n
Yes No N/A
I??
*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.