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4.0 MITIGATIVE MEASURES <br />Various designs ofmine operations and facilities have been incorporated to minimize disturbance of <br />area hydrologic functions at the New Elk Mine. <br />A survey of all water users of both surface and groundwater has been made and an assessment of <br />potential impacts completed. This information is contained in the mine permit document. <br />The primary mitigative measure is the surface water control plan which is discussed in the mine <br />permit document. This plan provides for the use of ditches and impoundment structures To decrease <br />sediment levels generated from the surface facilities area. These affected areas include mine <br />discharges, refuse disposal areas, coal stockpiles and sediment control from disturbed areas. <br />Areas outside the surface water control plan are either seeded, mulched, and protected with straw <br />bale dikes or silt fences, or have previously been vegetated or graveled for erosional stabilization. <br />Minimization of disturbance is a long-term objective at the site. <br />A remediation plan has been implemented at the site of former underground storage tanks to <br />decrease organic concentrations of groundwater and soil. The remediation activities have been <br />completed and the system has been removed. <br />A spill prevention control plan has been prepared and can be implemented as situations arise. <br />Generally, the plan calls for containing any potential spills (i.e., oil, diesel fuel, gasoline, etc.) and <br />preventing the material from contaminating surface and/or groundwater. <br />Monitoring of area hydrologic functions will continue at the mine. This is an important mitigative <br />measure because it provides for identification of potential impacts and corrective actions to be taken. <br />Reclamation plans have been developed to restore surface lands and drainage. These plans are <br />discussed in detail in the mine permit document. <br />626-Annual Hydrolic Monitoring (Apc9.02).doc 28 <br />April 17, 2002 <br />