Laserfiche WebLink
and Environment) limitations. However, mine-related discharge may exhibit <br />increased levels of total dissolved solids. The Bowie No. 2 Mine permit document <br />provides reasonable predictions of mine-related discharge quantity and quality, <br />specifically emphasizing possible increases in total dissolved solids to the <br />hydrologic system. The predictions indicate that any such increases should not be <br />significant, and downstream uses should not be impacted. <br />Perched groundwater, located above the mine workings and within the permit <br />boundary, could be impacted by subsidence. Specifically, subsidence could <br />temporarily de-water these zones; however, these water sources are not used, and <br />recharge should occur over time. It is also possible that [he local bedrock <br />groundwater quality could be impacted by elevated total dissolved solids <br />concentrations, as the mine fills with water following mining, and as the water <br />infiltrates to surrounding groundwater. Impacts within the permit area should be <br />minimal, due to the relative lack of useable groundwater, and due to the vertical <br />separation which exists between the D-2 coal seam and the Rollins Sandstone <br />located considerably below the mining elevation. Local alluvial systems <br />downgradient form the mine should not receive sufficient mine water drainage to <br />create any impacts. <br />IV. Topsoil <br />Information regarding baseline soil studies may be found in Section 2.04.9 of the permit. <br />Information regazding the salvaging and replacement of topsoil may be found in section <br />2.05.4 of the permit. All available topsoil will be salvaged from areas to be disturbed by <br />mining prior to disturbance. During reclamation, topsoil will be replaced in a 12 inch <br />deep layer. Six inches of topsoil will be replaced on top of 3.5 feet of fill over the <br />reclaimed gob pile. <br />A. The Division does not propose to approve alternative procedures for topsoil <br />protection (4.06.1(2)). <br />B. The Division waived the requirement for clearing of small shrub and grass-type <br />vegetation cover prior to topsoil removal. The applicant has demonstrated that <br />inclusion of vegetation cover in salvaged topsoil is not detrimental to soil <br />productivity consistent with the post-mining land use. Large tree and shrub <br />vegetation was removed prior to topsoil salvage. <br />C. The Division has determined that the 'A' and'B' horizons shall be removed <br />together and replaced, in order to ensure soil productivity consistent with the <br />approved post-mining land use (4.06.2(3)). <br />D. The Division has not determined that selected overburden materials shall be used <br />for or as a supplement to topsoil. (4.06.2(4) (a)). <br />23 <br />