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impact as outlined in the original 1983 Findings Document remains valid for the <br />proposed operation during this permit renewal term. <br />K. Cumulative Hydrologic Impact Statement <br />A Cumulative Hydrologic Impact Assessment (CHIA) was completed for the <br />Twin Pines No.2 Mine and considers the hydrologic impacu of all anticipated <br />mining and reclamation activities in the area of the proposed operation at the <br />mine during the permit renewal term. This CHIA is available in company with <br />the most current versions of other such studies under a separate cover in the <br />permit application file area of the Division. <br />Pursuant to Rule 2.07.6(2)(c) and in consideration of the absence of <br />demonstrated significant hydrologic impacts by the anticipated mining and <br />reclamation operations in the study area, either individually or cumulatively, the <br />Division finds the proposed operation at the Twin Pines No. 2 Mine to have <br />been designed to prevent material damage to the hydrologic balance outside the <br />proposed permit area. <br />IV. Topsoil <br />Topsoil resource information is contained in Section 2.05 of the permit application <br />on page 81. Both the mine and sales site were disturbed prior to the current <br />operation, so topsoil recovery on the portal bench was not possible. Whatever <br />amount of topsoil that once covered the mine site was mixed with overburden and <br />coal waste. Baseline soils information can be found in Section 2.04.9, <br />pages 53-59N, in the permit application. The soil cover has been mapped and can <br />be seen on page 55. Topsoil available for reclamation of the mine site is scarce due <br />to the area's being previously disturbed by the Golden Quality Mine. The portal <br />area rests on a spoil pile which has been regraded with the majority of the spoil used <br />to construct the Lewis Gulch Fill. The spoil from the Lewis Gulch Fill will be used <br />to baclcfill and grade the portal bench area. Some topsoil was removed when the <br />access road from the County Road 77 to the mine site was widened and realigned. <br />The 800 cubic yards of topsoil that remain have been placed in two topsoil piles <br />adjacent to the mine access road. This topsoil will be used for the reclamation of <br />the portal area. <br />Approximately six inches of topsoil will be available for spreading over the mine <br />bench area once the bench surface is properly prepared and scarified. In order to <br />comply with the topsoil Rule 4.06.2(4)(a), the Division has determined that selected <br />overburden materials shall be used for, or as a supplement to, the available topsoil. <br />This determination is based on physical and chemical analysis and field-site trials <br />approved by the Division. <br />A soil testing program has been approved and incorporated into the permit. In brief, <br />the operator has committed to testing overburden soils used as a topsoil substitute for <br />amendments such as lime and fertilizer if deemed necessary. The permit language <br />can be found on page 88 of the permit application. <br />25 <br />