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• • iii iiiiiiiiiiiu iii TRAPPER MINING INC. 999 July 20, 1987 DELIVERED 7/21/87 Mr. Gregg Squire Colorado Mined Land Reclamation Division 423 Centennial Building 1313 Sherman Street Denver, CO 80203 Dear Gregg: The following discussion is in response to your July 1, 1987, letter regarding approval to increase the number of stockponds approved in TR-29, in September, 1986. I[ also describes a general plan for stabilizing reestablished drainageways at Trapper Mine. These proposals are presented below as a single plan because they are interrelated. When approved, separately or together, they will be incorporated into our permit. ,- The following proposed plan addresses three main areas. 1. Reduction of runoff into reestablished drainageways. ~J 2. Protection of drainageways through physical controls until vegetation establishment. 3. Monitoring of reestablished drainageways and subsequent repairs. 1. Reduction of runoff Trapper Mine proposes to control runoff into reestablishing drainageways by two methods. The first method, establishment of vegetation on the reclaimed areas, is a part of the existing reclamation process and generally takes two to three growing seasons to reach total effectiveness. The interim period may be characterized as having runoff higher than what would be expected once the reclaimed areas achieve perennial vegetation establishment. Thus, other types of control may be necessary to lengthen the watershed hydrograph and also reduce the overall volume of water entering a reestablishing drainageway. Trapper proposes to construct livestock watering facilities to provide both short term runoff control and long term watering facilitis for both domestic livestock and wildlife. These ponds will meet the criteria of technical revision 29 (TR-29) and the average pond density will be no more than one pond per ten acres. Presently, cont. P.O. Box 187 Craig, Colorado 81626 (303) 824-4401