HYDRO24511

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 10/20/1998
• Doc Name: 3rd Qtr 1998 Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Ispouadmeats
INSPECTOR'S NAME: M; ha ~ Al avi lla DATE: _ 09/18/98
NPDES I.D. NO.: co-0000 221 D.P. 003
FACILITY CONFIGURATION: D iked Pond DATE LAST INSPECTION: 06/29/98
SITE NAME: Nerthweat Impo undment i`003 LOCATION: ~~ ~W'+~~ T6N R87W
MINE NAME: s n a IT Min (seneca Coal Col LOCATION: 7.1 mi. sE of Hayden .~
MINE I.D. NO.: CMi.Rn Perm it No_ C-80-ODS OWNER'S REP.: Brad Brown, Gen Mq~
1. Foundation preparation (removal of vegetation, stumps, topsoil:
2. Lift thickness:
3. Compaction according to approved plan:
4. Burning (specify extent and location):
5. Angle of elope: 2:1 upstream,
es No
1Z in
es No
Yee No
3:1 downstream Total = 5.1
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment elopes:
At natural hillside:
Over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
7.
8.
9.
10
Cracks or scarps on crest:
Cracks or scarps on elope:
Sloughing or bulging on elope:
*Major erosion problems:
11. Surface movements in valley bottom or on hillside:
12. *Eroeion of toe:
13. *Water impounded against toe:
14. Existing embankment freeboard: see comments
15. Increase Decrease in water level: No change
16.
17.
18.
19
20
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in Blurry surface:
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
Yee No
Yes
Yes
Yes o
Yes ( fo
Yee o
Yes No
Yee
Yee o
Yee No
Yee
Yee
Yea o
4.9 feet
_ feet
Yea No
Yee No
N/A
N/A
N/A
N/A
LLB
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N A
Yea (~o ~ N A
Yes o A
Yee ~ N A
Yes ~ N A
Yes No /A
No N/A
*Major adverse changes in these items could cause instability and ehou ld 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 apace on
the back of this sheet.