2008-10-06_HYDROLOGY - C1981041

• Permit No: C1981041
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/6/2008
• Doc Name: 3rd Quarter 2008 Sediment 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

Operator:
Permit:
Pond Identification
Type of Pond
Status During Inspection:
Design Depth
Design Max Water Depth
Design Max Sed. Depth
Sediment Level
Nater Level
outflow
Rills & Gulleys
Inadequate Vegetation
Outlet Channel Erosion
Burrows
Other
vctural
Differential Settling
Cracks or Slides
Seepage
Other
purtenant Structures
QUARTERLY POND INSPECTION REPORT
Snowca Coal Company Quarter:
C-1981-041 Inspection Date:
Page 2/3
Third 2008
I
12-Sep-08
9 RSRDA 10 CRDA-2 11-CBA-2 13-North Portal SAE N Decl CBA-1
Sediment Sediment Sediment Sediment E/W Sums Sum
Desi n and Actual Depth from S illwa 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 3.9
D Dr Dr Dr Dr Dam
0 0 0 0 0 0

'roblem 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
No No No No No No
No No No No No No
No No No No No No
No No No No No No
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

ditional Comments Sediment level in pond 11 is about 3.5 feet below the top of the sediment poles.
Pond 11 has adequate capacity within the 3.5 feet to contain 2
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J. E. Stover
Colorado P. E. 19230 Date