REP33838

• Permit No: C1981019
• IBM Index Class Name: Report
• Doc Date: 3/16/2005
• Doc Name: 2004 AHR Section 1
• From: Colowyo Coal Company L.P.
• To: DMG
• Annual Report Year: 2004
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

• • •l,
ELENNECOTT ENERGY COPAPReNY
COLONUYO C0.4L COflAPANY L.P.
flNNUAL IRAP~UNOMENT INSPEC710N
SRftALL IflAPOUNDAAENT3 /STOGIE PONDS
DP+TE: 8126/®4

-
Ira oundment Name Erosion, Instability,
Stmctuml Weakness,
Hazardous CondBions
4.05.9 1 a
Monitoring procedures
and Instrumentation
4.05.9 15
Depth of
Impounded Waters
4.05.9 1 c
Elevation of
Impounded Waters
4.05.9 15 c
Existing Storege
Capacity
4.05.9 15
Olher Structural Instability
or Maintenance Required
4.05.9 1 e
Experienced
Impoundment
Ins clot 4.05.9 14
Date
Of
Ins action
Stock Pond A None Annual Inspections Dry Dry 0.041 ac-fl. None K.R. Blunt 8/262004
Stock Pond B None Annual Inspections Dry Dry 0.068 ac-fl. None K.R. Blunt 8262004
Stock Pond C None Annual Inspections Dry Dry 0.06 ac-ft. None K.R. Blunt 8262004
Stock Pond D None Annual Inspections Dry Dry 0.067 ac-ft. None K.R. Blunt 8262004
Stock Pond E None Annual Inspections Dry Dry 0.054 ao-fl. Nona K.R. Blunt 8262004
Stock Pond F None Annual Inspections Dry Dry 0.036 ao-fl. None K.R. Blunt 8262004
Stock Pond G None Annual Inspections 1.0 R. 7790.5 0.030 ac-H. None K.R. Blunt 826/2004
Stock Pond H None Annual Inspections Dry Dry 0.038 ao-fl. -None K.R. Blunt 826/2004
Stack Pontl I None Annual Inspections Dry Dry 0.022 ac-R. None K.R. Blunt 8262004
Stock Pond J None Annual Inspections 0.5 ft. 7850.5 0.47 ac-ft. None K.R. Blunf 8262004
Stock Pond K None Annual Inspections 4.0 ft. 7392.5 0.95 ac-R. None K.R. Blunt 8262004
Stock Pond L None Annual Inspections 4.5 R. 7291.5 0.27 ao-fl. None K.R. Blunt 81282004
Stock Pond M None Annual Inspections 2.5 ft. 7299.5 0.25 ac-fl. None K.R. Blunt 8262004
Stephan R. Hinkemeyer, Colorado P.E. 25436
Date of Ceriifiwtion
GF t].te 2004 RMSe482fi2004
I, Stephen R. Hinkemeyer, being a Registered Professional Engineer in the State of
Colorado, do hereby cedify that the information displayed in this table has been
reviewed by me and is true and correct to the best ofLny knowledge and intomurtion.
the above impoundments were maintained as designed, and in accordance w8h the
approved plan and applicable regulations.
Note: (d) impoundment volumes ere estimated from pre-existing as-built surveys,
erW estimates of accumulated sediment. .