HYDRO26450

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 10/29/2001
• Doc Name: 3rd Qtr 2001 Sediment Pond Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
II(^~Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: U.lE h~h~$ ~ o~.2S DATE: ~'~G'~
NPDES Z D NO ~ CO-0000221 D P 012
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 6 'ZO'O
SITE NAME: Pond #012 LOCATION: NE'/a NW'/a Sec. 19. TSN, R87W
MINE NAME: Yoast Mine(Seneca Coal Co) LOCATION: 8.5 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-94-062 OWNER'S REP.: Greo a Kitchen Gen Mar
Circle or write in aovroorinte response
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes No N/A
2. Lift thickness: ~ in. N/A
3. Compaction according to approved plan: Yes No N/A
4. Burning (specify extent and location): Yes No N/A
5. Angle of slope: 3.0:1 upstream, _ 3.0:1 downstream Total = 6.0:1 N/A
6. 'Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No /A
At isolated points on embankment slopes: Yes o N/A
At natural hillside: Yes ~
No N/A
Over widespread areas: 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 N~6 N/A
8. Cracks or scarps on slope: Wl i ov oQ~ So, ~ C. v~ ~n- S Yes No N/A
9. Sloughing or bulging on slope: Yes N6~ N/A
10. *Maj or 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
19. Existing embankment freeboard: (norm al = 8.0'1 ~•n feet
15. Increase Decrease in water level: lto c.~..c~K.1 D_ feet
16. Cracks, bul in
g g, or erosion on upstream face:
Yes
~
No
N/A
17. Visible sumps or sinkholes in slurry surface: Yes No N~
18. *Clogging
Spillway channels and pipes: Yes No N/A
Decant system: Yes N N~Pr
Diversion ditches: Yes No NL
19. *Cracking or crushing of pipes
Spillway pipes: Yes No N/A
Decant system: Yes No N/A
20. Trash racks clear and in place: Yes No 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.