HYDRO22098

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 1/23/1986
• Doc Name: 1st to 4th Qtr 1985 Inspections
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Mater, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Oe l..,n;s ^1C L.ci~ DATE: T -ZI-+;~
N.P.D.E.S. I.D. NO.: rn-nnnn ~i n_P_ nn3
FACILITY CONFIGLRATION: Hiked Pnnd DATE LAST INSPECTION: q-~l-~ S
SITE NAME: ~lnrthwact Tmnnund ant !1003 LOCATION: S !• WS;. Sec. 27. T6N, R87W
MINE NAME: Sonora ri Mina (ppahody Coal Gomoanvl LOCATION: 7.1 mi. SE of Havden. CO
MINE I.D. NO.: rMIRR Parmit Nn. c-nH~-13H OWNER'S REP.: pon Zulian. Suut.
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil7) __
2. Litt thickness (inches)
3. Compaction according to approved plan _
4. Burning (specify extent and location) N/A
5. 14ngle of Slope 4der~rwi~) 9~1 unctraam 3~1 dnwnst
' ream- total _
6. *Seepage (specify location, color,
and approximate vol ume)
From underdrain pipes ~
At isolated points on em ankment s opes

At natural hillside _

Over widespread areas _
From downstream foundation area
"Boils" beneath stream or ponde water
7. Cracks or scarps on crest
8. Cracks or scarps on slope _
9.. Slaughing or bulging on slope
10. *Major erosion problems
11. Surface movements in valley bottom or on hillside
12. *Erosion of toe _
13. *Water impounded against toe
14. Existing embankment freeboard (feet) ~~.k,~i~~, r, ~L.Q.~-utQ_
15. Increase Decrease in water level (feet) U
- ~ ~ G a ..~
-~--
16. Cracks, bulging, or erosion on upstream face
17. Visible sumps or sinkholes in slurry surface
18. *Clogging
Spillway channels and pipes
Decant system
_ Diversion ditc es _
19. *Cracking or crushing of pipes
Spillway pipes
Decant system fJA
20. Trash racks clear and in place N/A
Yes No
~_ inches
Yes No
XI+1fXX~PW
_ %:.L ~
XR%XX
Yes
Yes N
Yes
Yes o
Yes @Ig
Yes I~o
Yes No
Yes t~o
Yes No
Yes ~D
Yes rNd
Yes Qia
.S feet
U feet
Yes
XittXXNd
Yes (®
XNi(XXNId
Yes to
Yes ~'o
X~fi(XXD(di
X83(XXO(d{
*Mafor adverse changes 1n these items could cause instability and should be reported to
the Engineering Manager and Mine Superin ~n~+,'I~~~,I~.~luation. Adverse condi-
tions noted in these items should normal! ~~! ~~ ~~~~, location, volume, etc.)
in the space on the back of this sheet.
JAN 2 S 1986.
1 ~\IA llrh. •u~~.~..