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The maximum grade for light-use roads is defined by applicable performance <br />standards as 20 percent. Existing light-use roads at the Southfield Mine generally <br />• follows the configuration of the natural terrain. The maximum existing gradient is <br />14 percent over a short distance. However, overall light-use road gradients <br />average less than 10 percent. <br />Most of the light-use roads in the mine area are existing ranch roads which are <br />utilized for both limited mine use and surface owner access. The remaining short <br />connecting roads were constructed during initial mine development in 1978. In <br />most cases, topsoil was not removed and stockpiled in conjunction with light road <br />construction. <br />As necessary, EFCI has utilized localized drainage, erosion control, and <br />stabilization measures to control and minimize erosion, siltation and potential <br />adverse impacts on environmental values and the hydrologic balance. <br />Light-use roads are not surfaced, consistent with their intended use. Natural <br />subsoil materials exposed by road construction are not acid or toxic forming based <br />upon available soil analysis results. Roads will be adequately maintained to <br />minimize erosion and provided for continued access. Use of light-use roads may <br />be restricted during inclement weather if water quality degradation could result. <br />When the facility for which light-use roads provide access are no longer utilized, all <br />light-use roads except the service road for the south mine fan installation and the <br />light-use road to the Newlin Creek Topsoil Stockpile will be reclaimed to blend with <br />the surrounding terrain and support post-mining land uses. <br />Reclamation of light-use roads will involve the following sequential steps: <br />o Road beds will be ripped and scarified. <br />• o Cut and fill slopes will be regraded to blend with surrounding terrain. <br />MR-44 4.03-7 Revised -May 2002 <br />