HYDRO24697

• Permit No: C1982056
• IBM Index Class Name: Hydrology
• Doc Date: 1/30/2006
• Doc Name: 4th Quarter 2005 Review Memo
• From: Byron Walker
• To: File
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman S[., Room 275
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
Interoffice MEMORANDUM
to: File
from: Byron G. Walker
subject: Review of Impoundment Inspection Reports
Permit: C-1982-056, 4th Quarter 2005
date: January 30, 2006
COLORADO
DIVISION O F
MIN SRALS
GEOLOGY
E~FETY•SCIENCE
Bill Owens
Governor
Russell George
Executive Director
Ronald W. Cattany
Division Director
Natual Resource Trustee
This review is conducted to determine compliance with Rule 4.05.9(17). The subject quarterly
inspections reports, dated 12/21/05, arrived at the Division of Minerals and Geology on January
30, 2006, under a letter dated January 10, 2006.
Inspection reports were submitted for Ponds B, C, D, E, F, G, T, FCT, FCBH, Area #1 pit,
thickener underfloor, FCT Waste Water, and Waste Water Treatment Ponds 1, 2, 3 and 4
(polishing). The former 18-Right cuttings impoundment has been filled in.
Were the ponds inspected for structural weakness? Yes [included differential settling, cracks or
slides, seepage, erosion (included rills and gullies on embankments, inadequate vegetation, outlet
channel erosion, burrows and other)].
Were the ponds inspected for other hazardous conditions? Yes (included defective spillways,
dewatering device clogged, faulty gate, baffles, pumps, and other).
Did a qualified person designated by the operator prepare the reports? Yes, Brian Watterson, a
qualified person, accomplished the inspections.
The reports also included information on sediment levels and any required maintenance. A need
for maintenance appears to be developing at pond E and the Waste Water Treatment ponds.
Office of ice of Colorado
Mined Land Reclamation Attive and Inactive Mines Geological Survey