HYDRO30507

• Permit No: C1981041
• IBM Index Class Name: Hydrology
• Doc Date: 10/27/2006
• Doc Name: 3rd Quarter 2006 Pond Inspection Report
• From: J.E. Stover & Associates
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

QUARTERLY POND INSPECTION REPORT
Page 2/3
Snowca Coal Com an Quarter:
C-81-041 Inspection Dale:
Identification
of Pond
s During Inspection:
in Depth
in Max Water Depth
m Max Sed. Depth
ientLevel
Level
Rills & Guileys
Inadequate Vegetation
Outlet Channel Erosion
Burrows
Differential Settling
Cracks or Slides
Seepage
9 RSRDA 10 CRDA-2 11-CBA-2 13-North Portal SAE N Decl CBA-1
Sediment Sediment Sediment Sediment E/W Sums Sum
9.0 9.0 8.0 6.0 n/a
n/a n/a n/a n/a n/a
4.3 5.3 n/a 2.0 n/a
7.3' 5.7/6.1 2.5/2.5** 5.8 n/a
Dr D Dr D D
0 0 0 0 0

Problem Problem Problem Problem Problem
Yes/Nc Yes/No Yes/No Yes/No Yes/No

No No No No No
No No No No No
No No No No No
No No No No No
No No No No No
Yes/No
No
No
No
No
No
No
No I No I No I No
purtenant Structures
Defective Spillways
Dewatering Devices Clogged
Faulty Gates, Elc.
Other
Comments
Required:
No No No No N/A N/A
Nc No No No N/A N/A
No No No No N/A N/A
The toe of pond 10 embankment was repaired during the quarter.
' Water level in pond 9 is about 0.75 feet below the invert of the primary spillway.
"Water level in pond 11 is about 2.5 feet below the top of the sediment poles..o O °g
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Pond 11 has adequate capacity within the 2.5 feet to contain 25-year event. ~A~,P°
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"' CBA-1 Sump needs dewatered and sediment removed. ~ ~~° F°~ sTp°°°~<^°e
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Pond 6 embankment facing Coal Gulch needs maintenance on riprap. ~ v o c S~ ~
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r
A
There is rock built up in the Pond 9 inlet channel from the upper diversior~ ~. ~~ ;~ a * i
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ditch that needs to be removed. ;q ~ W W b ~. ~;

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J. E. Stover ~~~~N ~,
. ~
i
Colorado P. E. 19230 Dale
of Inspector: Jim Stover