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g. Terraces will be constructed as necessary to prevent excessive erosion and to <br />• provide long-term stability in cut-and-fill slopes; <br />h. The regraded area will be reclaimed in accordance with the approved reclamation <br />plan; <br />i. Unless otherwise authorized by the Division, all road-surfacing materials will be <br />removed, hauled or conveyed and disposed under 4.11.4. <br />General Renuirements. WFC will maintain and reclaim access roads to minimize erosion and <br />siltation, air and water pollution and damage to public and private property. To the extent <br />possible, using the best technology currently available, access roads do not cause damage to <br />fish, wildlife, or related environmental values and do not cause additional contributions of <br />suspended solids to streamflow or to runoff outside the permit area. Any such contribution shall <br />not be in excess of limitations of State or Federal law. The locations of access roads are shown <br />on Exhibit 12-2 and 12-3 and a typical cross section is shown on Exhibit 13-20. <br />Lac~tifln. Peabody located access roads on ridges or on a stable slope in order to minimize <br />erosion. No part of any access road is located in the channel of an ephemeral stream where the <br />• upstream watershed is larger than one square mile or in intermittent or perennial streams. <br />Stream crossings 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 balance. <br />Access roads utilize culverts designed to safely pass the 10-year, 24-hour precipitation event <br />(see Table 13-3, Culvert Specifications). Ditches and drainage control were established during <br />construction and maintenance of the roads to minimize erosion and to assist traffic passage. <br />Deaign and Gonct ~ ion. The design of the access roads incorporated the demand for mobility <br />and travel efficiency, based on the geometric criteria appropriate for the anticipated volume of <br />traffic, weight and speed of the vehicles to be utilized. <br />Access roads were designed and constructed or reconstructed in compliance with the following <br />standards in order to control erosion and disturbance of the hydrologic balance. <br />The vertical alignment of the access roads does not exceed 10 percent on the overall grade. <br />Maximum pitch grade does not exceed 15 percent, and there is no more than 300 feet of pitch <br />grade exceeding 10 percent within any consecutive 1,000 feet. <br />• <br />13-14 <br />