2008-01-16_PERMIT FILE - C1994082A (4)

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I.D. Name Sedimentation Pond 010 Sedimentation Pond 011 Sedimentation Pond 011A Sedimentation Pond 012 Sedimentation Pond 013 Sedimentation Pond 014 Sedimentation Pond 012A Discharge Structures Location North of mining area East of mining area East of mining area West of mining area West of mining area Southwest of mining area West of mining area Design (Tab 13) Attachment 13-3 Attachment 13-4 Attachment 13-12 & 13-18 Attachment 13-12 Attachment 13-12 Attachment 13-12 Attachment 13-12 & 13-21 Discharge from sedimentation ponds, diversions and pit dewatering will be controlled by energy dissipators, riprap channels, and other means or devices, where necessary, to reduce erosion, to prevent deepening or enlargement of stream channels, and to minimize disturbance of the hydrologic balance. Discharge structures will be designed according to standard engineering design procedures. Transportation Facilities Haulage Roads. The following describes the design and construction of the existing haul roads at the Yoast Mine. The locations of existing haul roads are shown on Exhibits 12-1, Operations Plan, and 13-1, Facilities Map. Geotechnical and geological investigations were completed for these roads and can be found in Attachments 13-5, Geotechnical Investigation Haul Roads Y-A and Y-B, and Pond 010, and 13-6, Geological Report for Haul Roads A and B. Proposed haulroads will be constructed using the recommendations included in these reports General Requirements. SCC will construct, maintain and reclaim haul roads to minimize erosion and siltation, air and water pollution and damage to public and private property. To the extent possible, using the best technology currently available, haul roads will not cause damage to fish, wildlife, or related environmental values and will not cause additional contributions of suspended solids to streamflow or to runoff outside the permit area. Any such contribution shall not be in excess of limitations of State or Federal law. Location. Approximately 4.1 miles of haulage road currently exist within the Yoast Mine permit boundary. The northernmost section (three miles in length) is designated as Yoast Road "A". The southernmost section (1.1 miles) is designated as Yoast Road "B". A third section (1.O.miles) designated as Haul Road D was constructed for use as an "out" road from the south mining area. Due to stability problems from Sta. 42+00 to 52+00 this road is no longer used and has been shut off to all traffic. As-Built construction summaries for Haul Roads A, B and D are contained in Attachment 13-11. As-Built drawings for Haul Roads A, B and Dare depicted on Exhibits 13-10.1 to 13-10.6 to 13-11.1 to 13-11.2, and 13-16, respectively. The topography and vegetation conditions of the site vary considerably, but can be divided into two general areas. The TR-36 11 Revised 08/07