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Structure Location Construction Dates <br />Access Road 1 RSS, Exhibit 6C 1975 & 1984 <br />Access Road lA RSS, Exhibit 6C 2007 Estimated <br />• <br />• <br />Description -Access Roads 1 and lA are portions of the Roadside South Portals (RSS) <br />operations area. Access Road SA extends from the lower parking lot up to the portal <br />bench where the warehouse and shop are located. The length of the road is <br />approximately 1550'. Access Road 1 begins on the upper mine bench, where it joins <br />with Access Road lA, and extends to the top of the Roadside South Refuse Disposal <br />Area (RSRDA). The length of the road is approximately 420'. <br />Design and Construction -Access Road lA will be constructed in 2007 as part of <br />Permit Revision 3. The grade on the road averages 10% and will be sloped .5% toward <br />the borrow ditch. The width of this road is approxmately 20' wide. The grade on <br />Access Road 1 from the portal bench to the top of RSRDA is 11 %. The width of the <br />Access Road 1 is approximately 20' wide. These roads will be used to gain access to the <br />shop, warehouse and supply yard. <br />Drainage -Drainage control for these roads are induded in the RSS operations area <br />drainage system. Runoff from the parking lot flows to a benn on the west side of the <br />parking lot and is directed to Pond 8. Runoff from Access Road lA is pid<ed up by a <br />ditch along the inside edge of the road and then directed to the berm along the lower <br />parking lot. Runoff from the top of the RSRDA is allowed to sheet flow for <br />approximately 165' distance to a berm where it is directed to the side ditch of Access <br />Road #1 and eventually to the North Colledion Ditch which is then directed to Pond 8. <br />Design for the RSS drainage is given in Appendix 13-2. <br />Surfacing -The roadbase across the parking lot is unknown, but the surface has been <br />paved with an estimated 4-6" of bituminous asphalt. Access road #lA will be plated <br />with gravel and there will not be acid-forming ortoxic-forming substances used in the <br />road surfacing. Access Road 1 has 4-18" of "red dog" gravel for the roadbase and 3/a <br />roadbase gravel on the surface. <br />Maintenance -The graveled portion of the roads will be watered occasionally during <br />the summer and graded as necessary. <br />PR-3 <br />T13-2-6 <br />Rev 04/07 <br />