2009-07-06_HYDROLOGY - C1981041

• Permit No: C1981041
• IBM Index Class Name: Hydrology
• Doc Date: 7/6/2009
• Doc Name: 2nd 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
perator:
Pond Identification
Type of Pond
Status During Inspection:
Design Depth
Design Max Water Depth
Design Max Sed. Depth
Sediment Level
Water Level
[Features
Rills & Gulleys
Inadequate Vegetation
Outlet Channel Erosion
Burrows
Other
uctural
Differential Settling
Cracks or Slides
Seepage
Other
purtenant Structures
Defective Spillways
Dewatering Devices Clogged
Faulty Gates, Etc.
Other
I Comments
IlMaintenance Required
Name of Inspector: Jim Stover
QUARTERLY POND INSPECTION REPORT
Snowca Coal Company Quarter: Second 2009
C-1981-041 Inspection Date: 29-Jun-09
9 RSRDA 10 CRDA-2 11-CBA-2 13-North Portal SAE: N Decl CBA-1 I
Sediment Sediment Sediment Sediment E/W Sums Sum
Design 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 3.8
Dry I Dry I Dr 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
No No No No INo No
No No No No IVo No
No No No No No No
No No No No IVo No
No No No No N/A N/A
No No No No N/A N/A
No No No No N/A N/A
No No No No No No
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 25-ye% j
None ! ®q?
a
0 1n_' 0
etc: ?4 1 " "
v®o/gMAL 00
J. E. Stover
Colorado P. E. 19230 Date