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~iiiiiiiiiiiiiiuiii 999 Wyoming Fusl Compony [2055 W. Second Place • P.O. Box [5596 • Lakewood. Colorado 80215 • Telephone (3031989-5037 RECEIVED March 1, 1985 Mai ~ i?3J MINED LAND RECLAMATION DIVISI011 Colo. Dept. of Natural Resources Mr. Greg Squire Mined Land Reclamation Division 1313 Sherman Street Denver, Colorado 80203 Re: Abatement Procedures for NOV C-85-004, Wyoming Fuel Company (WFC), New Elk Mine, Permit No. C-012-81. Dear Mr. Squire: I am requesting a 30 day extension for partial abatement of the above notice of violation. Nan effort to prevent unwanted thickener and wash plant discharge to ponds 006 and 007 WFC will be installing a clarified water circuit. This circuit will take clear water from the thickener for reuse in the wash plant. The electrical and concrete work for this circuitry is complete. The pump has been ordered and will be shipped on March 1, 1985. Considering shipping time and construction the new circuit should be in operation by the third week in March. During this interim period, it may be necessary to discharge thickener overflow and totally empty the thickener. I would like to use pond 006 for this purpose. Water will be held in this pond and discharged when NPDES effluent limitations are met. The only risk involved in doing this would be the chance of receiving a 10 year, 24 hour storm event at the same time the thickener was being emptied. This is a low risk during March. Sump water from the plant will report to the thickener. After the new circuiting is installed, it will still be necessary to empty the thickener two (2) or three (3) times per year for maintenance. Initial calculations show the thickener volume can be handled by distributing this volume between ponds 006 and 007. The thickener volume represents 2.16 acre feet. The combined excess storage capacity of ponds 006 and 007 also equals 2.16 acre feet providing a 60% sediment level is maintained (see calculation sheets attached).