HYDRO20304

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 10/21/1994
• Doc Name: QUARTERLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• From: PEABODY WESTERN COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORDf
Water, Sedimeat, or Slurry Impouadments
INSPECTOR'S NAME: Hichael G. Altavilla DATE: 09/23/94
NPDES I.D. NO.: CO-0000221 D.P. 005
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 06/07/94
SITE NAME: Pond X005 LOCATION: NW~r SW7a, Sec. 10, TSN, R88W
MINE NAME: Seneca II-W Hine (Peabody Coal Co.) LOCATION: 8 mi. S of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott Williams. Supt.
Circle or write is aapropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil: ea7 No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: ~e~ No N/A
4. Burning (specify extent and location): Yes No ~~
5. Angle of slope: 3.4 upstream, 2.5 downstream Total = 6.1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes ~ N/A
At isolated points on embankment elopes: Yes N/A
At natural hillside: Yes ~' N/A
Over widespread areas: Yes ~o_ N/A
From downstream foundation area: Yes LNo-; N/A
"Boils" beneath stream or ponded water: Yes ~Lo~' N/A
7. Cracks or scarps on crest: Yes CfLO- N/A
8. Cracks or scarps on elope: Yes ~ N/A
9. Sloughing or bulging on elope: Yes LIVE N/A
10. *Major erosion problems: Yes i~Qo~ N/A
11. Surface movements in valley bottom or on hillside: Yes ~Ip~ N/A
12. •EIOBion of toe: Yes ~lo~ N/A
13. *Water impounded against toe: Yes ~ N/A
14. Existing embankment freeboard: Approx 17 feet
15. Increase X Decrease in water level: Approx. 4 feet
16. Cracks, bulging, or erosion on upstream face: Yes ~lo~ N/A
17. Visible sumps or sinkholes in slurry surface: Yes No ~~
18. •Clogging
Spillway channels and pipes: Yes ,S~Z'
.~ N/A
Decant system: Yes N/A
Diversion ditches: Yes Cho] N/A
19. •Cracking or crushing of pipes
Spillway pipes: Yes ~No N/A
Decant system: Yes ~N9' 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.