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Haul road specifications are contained in Exhibit N of Appendix 2.05 which includes profiles and <br />other specifications such as width, gradient, surface specifications, cut and fill information and <br />culvert and ditch information. Specific discussions on the care and maintenance of the outslopes of <br />the haul road have also been described in Exhibit N. Road designs have been reviewed and <br />certified by a registered professional engineer as set forth in Exhibit N. Oakridge's haul road has <br />been designed to ensure that the construction, maintenance and post- mining conditions of the haul <br />road into and across the site will control erosion, siltation and the pollution of water entering and <br />leaving the area which the road will cross. The slopes and culverts of the road were designed and <br />are maintained in such a way to prevent additional contributions of suspended solids to run off <br />outside the permit area. In addition, there are no alternative design criteria or specifications other <br />than the proposed culvert spacing which deviates from the criteria set forth in Rule 4.03.1. <br />A section of the haul road crosses over the box cut spoil area which filled a section of Carbon <br />Junction Canyon within the permit area. The watershed above this area is less than one square <br />mile. There are no fords of ephemeral streams. No steep slope cuts are involved with the subject <br />haul road. <br />The surfacing of the haul road has been described in Exhibit N. Initially, a layer of bedrock was <br />established for the haul road and covered with crushed rock and gravel according to the schematic <br />in Exhibit N. <br />The haul road is maintained with graders and other equipment necessary to provide smooth, <br />adequate surface for the hauling of coal from the pit area to the staging area. Also, an existing light <br />duty access road is used at the mine. The subject road has been identified on the applicable maps. <br />The existing road will be maintained and upgraded as necessary for mine access. It is expected that <br />the existing road will be graded and graveled with a 2" x 0" gravel for light duty vehicles. No 50- <br />ton coal haulers will use this road. <br />The haul road will remain as a permanent access to the property after mining has been completed. <br />A letter from the landowner has been enclosed in Exhibit N authorizing the haul road to remain <br />after mining and reclamation for the post mining land use. The access roads will also remain as a <br />part of the post mining land use. <br />2 05 3(4) Ponds, Impoundments and Diversions <br />The sediment control system currently employ ditches (collection channels) to convey surface <br />water flow to one of the two sediment ponds. The structures are sized to contain runoff from a 10- <br />year, 24 -hour precipitation event. The sediment control system includes; a collection ditch from the <br />Permanently Reclaimed Spoils Area to Sediment Pond # 2, Sediment Pond # 2, an SAE at the North <br />Pit, a detention sump below the reclaimed Topsoil Stockpile # 2, a collection ditch to convey <br />drainage from Carbon Junction Canyon and disturbed areas to the east of the canyon to Sediment <br />Pond #1. With the demonstration of successful revegetation development (Technical revision 15), <br />the sediment control system will no longer be required. Carbon Junction Canyon has been <br />reconstructed to flow through a new permanent diversion. <br />Abridged Permit Document 54 Feb 2008 <br />