Laserfiche WebLink
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 <br />generally follows the configuration of the natural terrain. The maximum existing <br />gradient is 14 percent over a short distance. However, overall light-use road <br />gradients 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 <br />short connecting roads were constructed during initial mine development in <br />1978. In most cases, topsoil was not removed and stockpiled in conjunction <br />with- light road 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 <br />based upon available soil analysis results. Roads will be adequately maintained <br />to minimize erosion and provided for continued access. Use of light-use roads <br />may be restricted during inclement weather if water quality degradation could <br />result. <br />The road system to and around the refuse pile area, starting at County Road 92 <br />in the former Facilities Area, are light-use roads. Part of this road system lies <br />in remote areas, e.g. the west perimeter of the refuse pile, and may only be a <br />'track' for appropriate service vehicles. <br />When the facility for which light-use roads provide access are no longer utilized, <br />all light-use roads not approved for permanent retention will be reclaimed to <br />blend with 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 />4.0 3 - 7 Revised 108/04/07 <br />MR-55 <br />