HYDRO24873

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 10/21/2002
• Doc Name: 3rd Quarter 2002 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: ~~~~"~ Z
NPDES I.D
' . NO.: CO -0000221 D.P. 016 ~ _ZL, _ Q 1
G
E
ACILITY CONFIGURATI ON: Cross-Valley Pond DATE LAST INSPECTI ON:
SITE NAME : Pond #016 LOCATION: NEB/, SEy„ Sec. 27, 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.: Greg g Kitchen, Gen Mgr
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes
2. Lift thickness: in.
3. Compaction according to approved plan: Yes
I. Burning (specify extent and location): No
5. Angle of slope: 3:1 upstream, 3:1 downstream Total = 6:1
~~. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: N/A
At isolated points on embankment slopes: Yes ~ N/A
At natural hillside: es No N/A
Over widespread areas: Yes ~ NfA
From downstream foundation area: ~ No N/A
"Boils" beneath stream or ponded water: Yes o 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
L0. *Maj or erosion problems: Yes No N/A
11. Surface movements in valley bottom or on hillside: Yes No N/A
i2. *Erosion of toe: Yes No N/A
t3. *Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: (normal = 7.0') ~~.? £eet
15. Increase ~~ Decrease in water level: OaZ,, 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 ©o N/A
Decant system: N/A
Diversion ditches: N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes No N/A
Decant system: N/A
7.0. Trash racks clear and in place: Yes No N/A
*Maj or adverse changes in these items could cause instability and should be reported to the
Gnginee ring 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.