HYDRO21815

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 1/14/1999
• Doc Name: 4th Qtr 1999 Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORN
Water, Sediment, or Slurry Impouadaeats
INSPECTOR'S NAME: Michael Altavilla DATE: _12/10/98
NPDES I.D. NO.: co-0000221 D.P_ 003
FACILITY CONFIGURATION: Diked Pend DATE LAST INSPECTION: 09/18/98
SITE NAME: Nort hw a rmnr_+n n.+..,ont i'00~ LOCATION: ~~jyW'1~ Rec. 27t T6N, R87W
MINE NAME: Seneca 77 Mina (ceneca -ea7 f`o1 LOCATION: 7. mi_ c of Hayden,
MINE I.D. NO.: C r.Rn P rmit No. C-80-005 OWNER'S REP.: Brad Rrown Gen Mq~
1.
2.
3.
4.
5.
6.
Foundation preparation (removal of vegetation, stumps, topsoil: ee No
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of elope: 2:1 upstream, 3:1 downstream
*Seepage (specify location, color, and approximate volume)
From underdrain pipee:
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
11
Cracks or scarps on Greet:
Cracks or scarps on elope:
Sloughing or bulging on elope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
12. *Eroeion of toe:
13.
14.
15.
16.
17.
18.
19
*Wat er impounded against toe:
Existing embankment freeboard: see comments
Increase Decrease in water level: No chance
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in slurry surface:
*Clogging
Spillway channels and pipee:
Decant system:
Diversion ditches:
*Cracking or crushing of pipee
Spillway pipes:
Decant system:
20. Trash racks clear and in place:
~_ in
_ e® No
_ Yes No
Total = 5:1
Yes Nppo++-~~
Yea ~lo/
Yee o
Yee
Yee
Yes
Yee
Yee
Yee o
Yee o
Yee o
Yee
Yee
a•9 feet
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
N/A
N/A
feet
Yee ®o N/A
Yee No [~
Yes ~ N A
Yee No
Yee ® N A
Yes ~° N A
Yes No N/A
es 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 apace on
the back of this sheet.