HYDRO28550

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 4/20/1998
• Doc Name: QUARTERLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• 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 Impoundments
INSPECTOR'S NAME: M'cha 1 Al av'lta DATE: 03/1718
NPDES I.D. NO.: co-0000 221 ^. P. 006
FACILITY CONFIGURATION: C roe9-Valley Pond DATE LAST INSPECTION: ~„/~/47
SITE NAME: Pond x'006 LOCATION: NWT NW'q ce _ 2 mSN~ R88W
MINE NAME: a n a 77-W Mi n (c ne a .oat of LOCATION: 8 mi. S of Hay en, CO
MINE I.D. NO.: CM7.Rn Perm it No_ C-82-057 OWNER'S REP.: Brad Brown, Gen Mqy
1.
2.
3.
4.
5.
6.
7.
8.
9.
10
11
12
13
14
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of elope: 3:1 upstream, 3:1 downstream
*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:
Cracks or scarps on crest:
Cracks or scarps on slope:
Sloughing or bulging on elope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Erosion of toe:
*Water impounded against toe:
Existing embankment freeboard: Annrnximately
15. ~ Increase _
16. Cracks, bulging,
17. Visible sumps or
18. *Clogging
Decrease in water level:
or erosion on upstream face:
sinkholes in Blurry surface:
Spillway channels
Decant system:
Diversion ditches:
19.
20.
*Cracking or crushing of pipes
spillway pipes:
Decant system:
Trash racks clear and in place:
and pipes:
es
~Z
es
Yes
No
in
No
No
Total = 6:1
N/A
N/A
N/A
/A
N/A
Yea No
Yee ~ N/A
Yes ® N/A
Yes 1~ N/A
Yee N/A
Yes ~
o N/A
Yes o N/A
Yes NO N/A
Yee ® N/A
Yee ~ N/A
Yee N/A
Yes ~
No N/A
Yes ~ N/A
1(l~fl feet
0.3 feet
Yes ~ N/A
Yes No N®
Yes ~ N/A
Yee No ~fA~
Y
Yee No L,_yl
~a'
Yee No N/A
Yes No CA~J~.7
Yes No l yt(1 y
*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.