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Doc Date:1211112001 III I II I II I II IIII III <br />• J/4~HYDROLOGIC IMPACTS <br />This section discusses the predicted impacts and mitigation of the surtace and ground waters from the <br />Trapper Mine, changes in the post-mine hydrologic balance, probable impacts to the potential alluvial <br />valley floors, and operational monitoring. <br />4.8.1 Surface Water <br />Section 2.7.4 discusses the pre-mine conditions of the surface water near the Trapper Mine, while this <br />section discusses the surface water impacts and mRigation of those impacts. The use of surtace water at <br />Trapper Mine will be presented first and followed by a discussion of the surtace drainage during and after <br />mining. Finalty, data which were collected from the operational surface water quality mondorvg 's <br />presented, with a discussion of the surtace water quality after mining. This data includes the information <br />obtained during the initial permit term of 1981-1987. Data from 1988 through the present are inducted in <br />Appendix W (annual reports), Section 2. <br />• It should be noted that this application reflects the maximum expelled level of production at Trapper Mine <br />during the proposed permit period. A lesser production rate during parts or all of the permit period will <br />result in a slower progression of disturbance. The dreinage and sediment control plan presented in this <br />application covers atl affected lands at Trapper through the proposed permit term. All structures, <br />however, are planned for maximum disturbance through the IHe of the mine. <br />4.8.1.1 Use of Surface Water <br />Applications to the District 8 Water Court, Steamboat Springs, have been filed to use surface water in the <br />settling reservoirs for dust suppression, livestock and wildl'rfe. A copy of this application is inducted in <br />Appendix Q. This is the only use of surface water at Trapper Mine. <br />