2010-01-06_HYDROLOGY - C1981041 ‎(3)‎

• Permit No: C1981041
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/6/2010
• Doc Name: 4th Quarter 2009 Pond Inspection Report
• From: J.E. Stover & Associates, Inc
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: MPB
• Media Type: D
• Archive: No

Page 2/3
J Identification
of Pond
is During Inspection:
gn Depth
gn Max Water Depth
gn Max Sed. Depth
ment Level
?r Level
Rills & Gulleys
Inadequate Vegetation
Outlet Channel Erosion
Burrows
Other
QUARTERLY POND INSPECTION REPORT
snowcap coal company Quarter: Fourth 2009
C-1981-041 Inspection Date: 17-Nov-09
9 RSRDA 10 CRDA-2 11-CBA-2 13-North Portal SAE N Decl CBA-1
Sediment Sediment Sediment Sediment E/W Sums Sum
Desian and Actual Death from Snillwav Invert
9.0 9.0 8.0 6.0 n/a 4.4
n/a n/a n/a n/a n/a n/a
4.3 5.3 n/a 2.0 n/a 4.0
6.4 5.6/6.1 3.5 5.8 n/a 3.8
Dr Dr D Dr Dr Dr
0 0 0 0 0 0

Problem Problem Problem Problem Problem Problem
Yes/No Yes/No 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 No No No No No
Differential Settling No No No No No No
Cracks or Slides No No No No No No
Seepage No No No No No No
Other No No No No No No
Appurtenant Structures
Defective Spillways No No No No N/A N/A
Dewatering Devices Clogged No No No No N/A N/A
Faulty Gates, Etc. No No No No N/A N/A
Other No No No No No No
Additional Comments Sediment level in pond 11 is about 3.5 feet below the top of the sediment poles.
Pond 11 has adequate capa city within the 3. 5 feet to contain 25-year event.

Maintenance Required: None ®? . ,?® ?'

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Name of Inspector: Jim Stover
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Colorad P.?E'f--4H0 Date