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iii iiiliiiiilluiii <br />999 <br />BAST N <br />RESOURCES, ~N~. <br />a subsidiary of ENTECH, Inc. <br />~~F(~~~~~~d <br />AUG 29 1994 <br />Livision C. nur.erels 5 G9:,ICCy <br />Mr. Joseph Dudash <br />Colorado Division of Minerals and Geology <br />1313 Sherman, Room 215 <br />Denver, CO 80203 <br />RE: New Elk Mine; Permit C-81-012 <br />NOV C-94-18, C-94-19, and C-94-20 <br />Dear Mr. Dudash: <br />14300 Highway 12 <br />Weston, Colorado 81091 <br />(719)868-2761 <br />Purchasing (719) 868-2768 <br />Fax (719)868-2275 <br />August 26, 1994 <br />During the complete inspection of the New Elk Mine held during <br />August 10 through 12, three NOVS were issued. These NOVs were <br />directly related to a greater than 10 year/24 hour rain storm which <br />hit the mine on August 3. Due to the unusual and intense nature of <br />the event, which exceeded the design capacity of control structures <br />as required by the New Elk Mine permit and applicable regulations, <br />Basin requests that DMG consider the following facts in their <br />assessment of these three NOVS. <br />Events Surrounding the Problems Cited in the NOVs <br />The New Elk Mine permit require the structures identified in <br />the NOVs to be designed to handle a 10 year/24 hour precipitation <br />event. For this mine, such a storm corresponds to 2.9" of <br />precipitation for the entire 24-hour period. <br />However, the storm of August 3 exceeded the 10 year/24 hour <br />precipitation event standard, and for that reason alone caused the <br />conditions identified in the NOVe. A total of 2.99" of rain fell <br />during this event, of which 2.65" fell during an intense 4 hour <br />period. It was this intense cloudburst that caused the problems <br />which were seen during the inspection. <br />Immediately following the August 3 storm, Basin began <br />remedying the problems caused by the storm. Basin committed <br />substantial resources to this cleanup: it devoted approximately <br />500 manhours and $20,000 to cleanup activities from the time of the <br />storm until the inspection tour ended. Basin personnel and outside <br />contractors worked steadily to remedy the problems, except where a <br />