HYDRO26937

• Permit No: C1981041
• IBM Index Class Name: Hydrology
• Doc Date: 9/18/2000
• Doc Name: QUARTERLY POND INSPECTION REPORT
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

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QUARTER LY POND INSPECTION REPORT
Operator: Powderhorn Coal Com an Quarter: Third 2000
Permit: C-81-041 Inspection Date: 18-Se -00
Pond IdentiFlcatlon
Type of Pond
Status During Inspection: Desi nand Actual De th from S illwa Invert
Design Depth 9.0 9.0 6.8 5.0 Na 4.4
Design Max Water Depth Na Na Na Na Na 2.8
Design Max Sed. Depth 4.7 3.1 4.4 Na Na 4.4
Sediment Level 6.5 5.9/8.4' 7.5!7.8 Na Na 4.3
Water Level Pool Pool/Dam Puddles/Dam Puddles/Dam D Dam
Outflow 0 0 0 0 0 0
Features Problem Problem Problem Problem Problem Problem
YesJNo Yes/No Yes/No Yes/No Yes/No Yes/No
Erosional
Rills & Gulleys No No No No No No
Inadequate Vegetation No No No No No No
Outlet Channel Erosion No No No No No No
Burrows No No No No No No
Other No No No No No No
Structural
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, Elc. No No No No N/A N/A
Other No No No No No No
AddRional Comments 'Monitoring paint inaccessible due to standing water.
Pond 10 primary spillway is partially covered with sediment from Coal Canyon flow.
It was uncovered by the end on the quarter. ev ~'R E C /so
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Maintenance Required: f
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Pond 10 primary spillway needs further work to clean
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Name of Inspector: Jim Stover ~ * ~
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Colorado P,•~, 19230 Date

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9 RSRDA 10 CRDA-2 11-CBA-2 12-Mine Dis SAE N Decl CBA-1
Sediment Sediment Sediment Settlin real E/W Sums Sum