HYDRO30319

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 12/12/2001
• Doc Name: 4th Q 2001 Sediment Pond Inspections
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
D7ater, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: ~ Q1a ~n~ $ --.1 Otie~ DATE: ~~ - ~ ~~'
NPDES I.D. NO.: CO- 0000221 D.P. 012 (
.Z
FACILITY CONFIGURATION: Cros s-Valley Pond DATE LAST _
6_~
INSPECTION:
SITE NAME: Pond #012 LOCATION: NE'k ~ SeC 19 TSN R87W
MINE NAME: Yoast Mine lSeneca Coal Co) LOCATION: 8.5 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-94-082 OWNER'S REP.: Greaa Kitchen, Gen Mar
Circle or write in~oropriate resconse
1. Foundation preparation (removal of vegetation, stumps, topsoil: y~
2. Lift thickness: ~ i n.
3. Compaction according to approved plan: yes
4. Burning (specify extent and location): No
5. Angle of slope: 3.0:1 upstream, 3.0:1 downstream Total = 6.0: 1
6. *Seepage (specify location, color, and approximate volume)

From underdrain pipes: L1o
At isolated points on embankment slopes: Yes o N/A
At natural hillside: Yes No N/A
Over widespread areas: Yes No N/A
From downstream foundation area: ®e No N/A
"Boils" beneath stream or ponded water: Yes Nb'j N/A
7. Cracks or scarps on crest: Yes ~ N/A
8. Cracks or scarps on slope: I,v~~~..vw v~ So~~ cvc,c S es No N/A
9. Sloughing or bulging on slope: Yes No N/A
10. *Major erosion problems: es No N/A
11. Surface movements in valley bottom or on hillside: Yes No N/A
12. *Erosion of toe: Yes ~ N/A
13. *Water impounded against toe: Yes o N/A
14. Exis ing embankment Freeboard: /normal = 8.0') " feet $.o
15. ~ Increase Decrease in water leve L- ~ feet
16. Cracks, bulging, or erosion on upstream face: Yes ~ N/A
17. Visible sumps or sinkholes in slurry surface: NLA
18. *Clogging

Spillway channels and pipes: ~^^
Yes /NO l
N/A
Decant system: Yes No N/A
Diversion ditches: N~
19. *Cracking or crushing of pipes
Spillway pipes: Yes o N/A
Decant system: Yes o N/A
20. Trash racks clear and in place: Yes No N/A
*Ma jor adverse changes in these items could cause instability and shou ld be reported to
the Engineering Manager and Mine Superintendent for further eval uation. Adve rse
con ditions noted in these items should normally be described (extent, location, volu me,
etc .) in the space on the back of this sheet.