HYDRO29267

• Permit No: C1981019
• IBM Index Class Name: Hydrology
• Doc Date: 9/8/2004
• Doc Name: 2004 Annual Impoundment Inspection Report
• From: Knight Piesold Consulting
• To: DMG
• Permit Index Doc Type: Prof Pond Certifications
• Media Type: D
• Archive: No

'4
Kennecvtt
_., ; Energy
Ca/owyo Mine
DATE: 8/25/04
ANNUAL IMPO'SNDMENT INSPECTION
NPDES PONDS AND OTHER HOLDING PONDS

m oundment Name Erosion, Instability,
Structural Weakness,
Hazardous Conditions
4.05.9 15 a
Monitoring procedures
and Instrumentation
4.05.9 15 6
Depth of
Impounded Waters
4.05.9 15 c
Elevation 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 eclat 4.05.9 14
Date
Of
Ins ection
Streeter Pond - 001A None QAIy, Annual Insp. 4.6 ft. 6582.6 ft. 0.87 ac-(t. None K. BIunUJ. Pickarts 8/25/04
Work Area Sediment Pond - 002A None QAIy, Annual Insp. 2.2 ft. 7148.2 ft. 7.31 ac-ft. None K. BIunUJ. Pickarts 8/25/04
Gossard Pond - 003A None QAIy, Annual Insp. 1.3 ft. 6385.5 ft. 1.11 ac-ft. None K. BlunllJ. Pickarts 8/25/04
Gulch APond - 004A None QAIy, Annual Insp. 8.0 H 6613.0 k. 4.06 ac-ft. None K. Blunt/J. Pickans 8/25/04
Stoker Siding pond - OOSA None QAIy, Annual Insp. 2.9 ft. 6324.8 ft. 0.56 ac-R. None K. Blunt/J. Pickans 8/25/04
Rail Loop Pond - OO6A None QAIy, Annual Insp. 4.5 ft. 6348.5 ft. 0.47 ac-il. Will 6e dredged Oct. 2004 K. Blunt/J. Pickans 8/25/04
Prospect Pontl - 007A None QAIy, Annual Insp. 7.5 ft 6741.5 h. 1.27 ac-ft. None K. BIunUJ. Pickans 8/25/04
West Pit Pond - OOSA None Qdly, Annual Insp. 0.1 ft. 6821.1 ft. 4.7 ac-A. None K. BIunUJ. Pickans 8/25/04
Section i6Pond - 009A None QAIy, Annual Insp. 4.8 ft. 7744.8 ft. 1.18 ac-ft. None K. BIunUJ. Pickans 8125/04
East Taylor Pond - 010A None QAIy, Annual Insp. 8.8 ft. fi938.8 1.97 ac-h. None K. BIunUJ. Pickans 8/25/04
Taylor Pump Holding Pond None QAIy, Annual Insp. 4.0 ft. 6553.0 (1. 3.5 ac-A. None K. BIunUJ. Pickans 8/25/04
Evaporation Pond North None QAIy, Annual Insp. 0.4 R. 7199.4 h. 5.1 ac-it. None K. BIunUJ. Pickans 8125/04
Evapoation Pond South None QAIy, Annual Insp. Dry Dry 4.2 ac-A. None K. BIunUJ. Pickarts SI25/04
Aeration Pond Nane QAIy, Annual Insp. 9.0 ft. 7212.0 h. 4.1 ac-A. None K. BIunUJ. Pickans 8/25/04
Sediment Sump None QAIy, Annual Insp. 8.5 ft. 7238.5 fi. 1.48 ac-ft. None K. BIunUJ. Pickarts 8/25/04
Washbay Pond - 0026 None QAIy, Annual Insp. 5.0 ft. 7201.0 ft. 15.65 ac-(t. None K. BIunUJ. Pickarts SI25/04
Signed: kr-+-T'S t) (µ~t- d-/25~~`y
oC pp Date:
I am a Registered Professio ABY~M f Colorado and a representative of Knight Piesold and Co., 1050 Seventeenth Street, Suite 450, Denver, Colorado 80265-2011.
•~ ~.
The information contained ~ ~rA ~ d by Colowyo Coal L. P. Being familiar with the Colowyo operation and the coal permitting process in Colorado, the information
contained herein tea rrec to jest my experience.
Certified B ~ Date:
Colorado Registered P.E.
srsroa
cF zt.t.z
Note: (d) impoundment volumes are estimated from pre-existing as-built surveys,
CF 1].182ppa Rehsetl 8252op4 and estimates of accumulated sediment.