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

.~ ac ~a
Co/owyo Mine
DATE: 8!25104
•
ANNUAL IMPO'lNDMENT INSPECTION
NPDES PONDS AND OTHER HOLDING PONDS
•~

m oundmenf Name Erosion, Instability,
Stmctural Weakness,
Hazardous Canditlons
4.05.9 15 a
Monitoring procedures
and Instrumentation
4.05.9 1
Depth of
Impounded Waters
4.05.9 15 c
Elevaticn of
Impounded Waters
4.05.9 15 c
Existing Storage
Capacity
4.05.9 15 d
Other Structural Instability
or Maintenance Required
4.05.9 15 a
Experienced
Impoundment
Ins ector 4.05.914
Dafe
Or
Ins ection
Streeter Pond - 001A None grtly, Annual Insp, q.6 N. 6582.6 ft. 0.87 ac-(t. None K. Blunt/J. Pickarts 825/0q
Work Araa Sediment Pond - 002A None grtly, Annual Insp. 2.2 ft. 7148? ft. 7.31 ac-ft. None K. BIunUJ. Pickarts 8/25/04
Gossard Pand - 003A None grtly, Annual Insp. 1.3 R. fi385.5 it. 1.11 ac-fl. Nona K. Blunt/J. Pickarts 825/04
Gulch APond - OO4A None grtly, Annual Insp. 8.0 ft 6613.0 N. 4.06 ac-11. None K. Blunt/J. Pickens 8/25/04
Stoker Siding Pond - OOSA None grtly, Annual Insp. 2.9 R. 6324.8 ft. 0.56 ac-ft. None K. BIunUJ. Pickarts 8/25/04
Rail Loop Pond - OO6A None grtly, Annual Insp. 4.5 ft. 6348.5 ft. 0.47 ac-fl. Will be dredged Oct. 2004 K. Blunt/J. Pickarts 8/25/04
Prospect Pond - 007A None grtly, Annual Insp. 7.5 ft 6741.5 N. 1.27 ac-ft. None K. BIunVJ. Pickarts 8/25!04
West Pil Pond - OOfiA None Otlly, Ahnuel Insp. 0.1 N. fi821.i 8. 4.7 ac-R. None K. Blunt/J. Pickarts 8/25/04
Section 16 Pond - 009A None grtly, Annual Insp. 4.8 ft. 7744.8 ft. 1.18 ac-ft. None K. BluntlJ. Pickens 8/25/04
East Taylor Pond - 010A None grtly, Annual Insp. 8.8 fl. 6938.8 1.97 ac-rt. None K. Blunt/J. Pickarts 8/25/04
Taylor Pump Holding Pond None grtly, Annual Insp. 4.0 ft. 6553.0 fl. 3.5 ac-N. None K. BIunUJ. Pickarts 8/25/04
Evaporation Pond North None Ortly, Annual Insp. 0.4 N. 7199.4 N. 5.1 ac-fl. None K. Blunt/J. Pickarts 825/04
Evaporation Pond South None grtly, Annual Insp. Dry Dry 4.2 ac-fl. None K. BInnUJ, Pickarts 8/25/04
Aeration Pond None grtly, Annual Insp. 9.0 N. 7212.0 ft. 4.1 ac-fl. None K. BIunUJ. Pickarts 8/25/04
Sediment Sump None grtly, Annual Insp. 8.5 it. 7238.5 ft. 1.48 ac-N. None K. BIunUJ. Pickarts 8/25/04
Washhay Pond - 0028 None gRly, Annual Insp. 5.0 fl. 7201.0 fl. 15.65 ac-ft. Nona K. Blunt/J, Pickarts 825/04
Signed: ~r-r ~ri U ~u^~ n Date: d~/25-~~}'
I am a Registered Pro(essio A I ee€~~ f Colorado and a representative of Knight Piescld and Co., 1050 Seventeenth Street, Suite 450, Denver, Colorado 80265-2011.
The Information contained' Grp d by COlowyo Coal L.P. Being familiar with the Colowyo operation and the coal permitting process in Colorado, the information
contained herein ~ rea • rrec ~to•~est my expefience.
~J i
Certified B ~ • Date: ) ~ I3~
Colorado Registered P.E.
fi5N4
CF 21.1?
Note: (d) impoundment volumes are estimated from pre-existing as-built surveys,
CF ty.iB ~eB4 ReWSed BrzSQenq and estimates of accumulated sediment.