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permit area. Any such contribution shall not be in excess of limitations of State or Federal <br />law. <br />The light -use roads at the mine site will be designed with appropriate ditches, grades, and <br />culverts to control erosion and runoff. All light -use roads will be constructed basically "on- <br />grade" and the location will be partially limited by the grades of the existing or postmining <br />areas. Stream fords will not be used during construction of roads unless approval is first <br />obtained from the regulatory authority. <br />Location WFC will locate light -use roads on ridges or on a stable slope in order to minimize <br />erosion. No part of any light use road will be located in the channel of an ephemeral stream <br />where the upstream watershed is larger than one square mile and in intermittent or perennial <br />streams unless specifically approved by the CDMG. Stream fords of an ephemeral stream <br />when the upstream watershed is larger than one square mile and intermittent or perennial <br />stream will be approved by the CDMG before construction proceeds. All other stream <br />crossings will consist of culverts in flowing streams, consistently wet areas, and in ephemeral <br />channels as necessary to allow passage and to minimize disturbance of the hydrologic <br />balance. Light -use roads will utilize culverts designed to safely pass the 10 -year, 24 -hour <br />precipitation event. Ditches and drainage control will be established during construction and <br />maintenance of the roads to minimize erosion and to assist traffic passage. <br />The 5th Street Light Use Road starts on the southeast corner of the permit area and <br />proceeds north along the overburden stockpile and enters the old 5th Street at Station 23 +50. <br />The road then continues west to Station 53 +80 which is west of Pond 007. <br />Design and Construction. Light -use roads will be field engineered to follow the existing <br />topography as much as practicable. Topsoil will be removed and stockpiled in accordance <br />with WFC's topsoil salvage plan. The horizontal and vertical alignment will be dictated by the <br />topography and the need to avoid obstructions. Light -use road surfacing material will be <br />adequate for the use of the road. Acid or toxic - forming substances will not be used in the <br />road surfacing. Light -use roads will be maintained to minimize erosion and to allow passage <br />of traffic. <br />The plan and profile of the 5Th Street Road is shown on Map 2.05.3(3) -8 Mine Roads. As <br />shown on the map, the road is 5380 feet long and actually starts on the southeast corner of <br />the permit area, near Lincoln Avenue, south of 5th Street. As seen in the profile on the same <br />map, the road has a grade of between 0% and 4% grade and an average width of 30 feet. <br />(Revised June 2010) 2.05.3(3) -34 <br />