2007-11-30_HYDROLOGY - C1980005

• Permit No: C1980005
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/30/2007
• Doc Name: 4th Quarter 2007 Sedimentation Pond Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO. N A
FACILITY CONF7:GURATION: Incised Pond
SITE NAME: Truck Wash Supply Pond
MINE NAME: Seneca Mine II (Seneca Coal Co)
MINE I.D. NO. CDMG Permit No. C-80-005
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Foundation preparation
Lift thickness:
Compaction according to
Burning (specify extent
Angle of slope: 2:1
DATE: ~~- IS' -U~
DATE LAST INSPECTION: `-~-~~
LOCATION: NW1/ NE1/ Sec 34 T6N, R87W
LOCATION: 7 1 mi SE of Hayden, CO
OWNER'S REP.: Grec(a Kitchen Gen Mar
Circle or write in apAropriate response
(removal of vegetation, stumps, topsoil: Yes
12 inches
Yes
approved plan:
No
and location):
2:1 downstream Total = 4:1
_ upstream,
for and approximate volume)
*Seepage (specify location, co
From underdrain pipes:
t isolated points on embankment
slopes: Yes
Yes No
No
A.
At natural hillside: Yes No
Over widespread areas: Yes No
From downstream foundation area: yes No
'Boils" beneath stream or ponded water: yes No
Cracks or scarps on crest: Yes No
Cracks or scarps on slope: Yes No
Sloughing or bulging on slope: yes No
*Major erosion problems:
hillside: Yes No
Surfaces movements in valley bottom or on yes No
*Erosio~~ of toe: Y
e
s No
*Water :impounded against toe: ' .
~
-
-~
a•I feet
Existing embankment freeboard: ( )
normal - 2 7
~ feet
Increase Decrease in water ~o-Q
level: i~t.o G -
Yes
Cracks, bulging, or erosion on upstrea m face: ~

Visible sumps or sinkholes in slurry surface: -
*Clogging Yes
Spillway channels and pipes:
Decant system: Yes loo
Diversion ditches:
*Cracking or crushing of pipes Yes No
Spillway pipes: ~A
Decant system: N~
Trash racks clear and in place:
~~ W~a'~~'
~ 1 ~
ccd CK~ve~'~ Owl ~ O6 ~
°' ~•
c
Discharge rate (gpm) 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
N/A
*Major adverse changes in these items could cause instability and should be reported to the
Engineering shougld normally bepdescribed t(extentrtlocationuavolume A etc S)e i ondhe spaceoondthe
these items
back of thi;~ sheet.