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~~~ 1111111111111if1 <br />999 <br />14300 Highway 12 <br />Weston, Colorado 81091 <br />(719)868-2761 <br />Purchasing (719) 868-2768 <br />Fax (719) 868-2275 <br />BASIN <br />RESOURCES, ~N~. <br />a subsidiary of ENTECH, Inc. ~ ~~ ~;~~ <br />December 28, 1993 <br />Mr. Joe Dudash <br />Environmental Protection Specialist <br />Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, Colorado 80203 <br />RE: Technical Revision to Return Coal Processing Waste to New Elk Mine - <br />Permit C-81-012 <br />Dear Mr. Dudash: <br />Basin Resources, Inc. hereby submits the following information for <br />your review and approval to allow coal fines recovered in the New Elk <br />Preparation Plant to be returned to the abandoned New Elk Mine. <br />Information included is in response to Rule 2.05.3 (10) - Return of Coal <br />Processing Waste to Abandoned Workings. Approval will also be obtained <br />from MSHA prior to operations. <br />The New Elk Mine Preparation Plant receives mined coal from the Golden <br />Eagle Mine. As the coal is washed, refuse is deposited in the thickener, <br />dewatered by belt press, and sent by conveyor to the Refuse Disposal Area. <br />Handling of these fines has caused problems for the operating efficiency of <br />the Prep Plant. Basin is proposing to dispose of these fines by pumping a <br />refuse/water slurry into the abandoned New Elk Mine and recovering clear <br />water for returned use in the Prep Plant. <br />Refuse fines will be recovered from the bottom of the thickener and <br />pumped in a poly-pipe line to the New Elk Mine slope (see attached map). <br />This line will be buried from one to three feet below the surface of the <br />ground to prevent freezing and disturbance from surface operations. <br />Exposed portions of the pipe will be bermed to prevent runoff should a <br />spill occur. The refuse slurry will consist of a maximum of 25 to 30 <br />percent solids, and water will be used as the transport medium. The slurry <br />will be allowed to accumulate at the bottom of the slope with the overflow <br />running to other portions of the underground workings. Return water will <br />be recovered by pump at the abandoned fan shaft (see location indicated on <br />the map) and piped to the Prep Plant for reuse. Slurry will be pumped at <br />a rate of 160 to 200 gallons per minute with return water being pumped at <br />the same rate to allow for makeup in the plant. A second set of pipes will <br />