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SCC, and the postmining landowners, have determined the access roads will increase the utilization of the <br />reclaimed and surrounding areas. When an access road is no longer needed for operations, SCC proposes <br />the following: <br />a. The top road surface will be narrowed to 20 feet <br />b. The road surfacing material from the narrowing of the section will be placed on the remaining <br />road width <br />C. Slopes flatter than 3H:1 V will be retopsoiled <br />d. All areas redisturbed by road narrowing activities will be reseeded to the edge of the road surface <br />Light -Use Roads There were slightly over 3 miles of operational light -use roads at the Seneca II -W Mine. <br />This is a conservative estimate, because as shown on Exhibit 12 -2, the light -use roads extend from the <br />topsoil stockpiles to the mining limit or to the nearest haul road rather than to the approved disturbance <br />boundary. These roads are or will only be used on an intermittent basis for purposes other than <br />transportation of coal including, but not limited to, roads used for monitoring and periodic maintenance of <br />monitoring facilities and reclamation areas, access for scrapers to and from topsoil stockpiles, or other <br />occasional use. <br />General Requirements. SCC will construct, maintain and reclaim light -use roads to minimize erosion and <br />siltation, air and water pollution and damage to public and private property. To the extent possible, using the <br />best technology currently available, light -use roads will not cause damage to fish, wildlife, or related <br />environmental values and will not cause additional contributions of suspended solids to streamflow or to <br />runoff outside the permit area. Any such contribution shall not be in excess of limitations of State or Federal <br />law. The locations of existing light -use proposed roads are shown on Exhibit 12 -2. A typical cross section is <br />shown on Figure 13-6. <br />Location. SCC will locate light -use roads on ridges or on a stable slope in order to minimize erosion. No <br />light -use road will be located in the channel of an ephemeral stream where the upstream watershed is larger <br />than one square mile or in intermittent or perennial streams unless specifically approved by the Division. <br />Stream fords of an ephemeral stream when the upstream watershed is larger than one square mile and <br />intermittent or perennial stream will be approved by the Division before construction proceeds. All other <br />stream crossings will consist of culverts in flowing streams, consistently wet areas, and in ephemeral <br />channels as necessary to allow pas sage and to minimize disturbance of the hydrologic balance. Light -use <br />roads planned to be used for a period of less than six months will utilize temporary culverts, where required, <br />designed to safely pass the 1 -year, 6 -hour precipitation event. Light -use roads planned to be used for a <br />period of more than six months will utilize culverts designed to safely pass the 10 -year, 24 -hour precipitation <br />event (see Table 13 -5). Attachment 13 -9, Generic Culvert Calculations — Light -Use Roads, provides <br />calculations for generic culvert sizes for light -use roads. Attachment 13 -7 contains calculations for light -use <br />PR -05 36 Revised 10/11 <br />