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TWENTYMILE COAL, LLC - FOIDEL CREEK MINE (C-82-056) <br />TR10-73, 19-RIGHT MINE DEWATERING INSTALLATION <br />TECHNICAL ADEQUACY RESPONSES (06/10) <br />1. Appendix A, revised page TRIO-73, does not include the reclamation costs for the entire proposed <br />disturbance. Revised page 2.05-50.9 proposes to backfill and grade the trench incrementally as <br />the pipeline is installed. Reclamation costs must be included for the entire length of the <br />disturbance. <br />Please include costs for backfilling and grading and topsoil replacement for the entire 7.5 acres of <br />disturbance. <br />Response: The reclamation cost estimate has been reviewed and revised to reflect reclamation costs <br />for the entire disturbance area, even though most of the pipeline reclamation will occur concurrently <br />with construction. The revised reclamation cost estimate accompanies these responses. <br />2. Current approved permit page 2.04.9 does not include discussion concerning the presence of <br />cultural and historic resources, and no revised page 2.04-9 was included with the TR-73 submittal. <br />Please indicate if the area of disturbance does not affect cultural and historic resources, or if a <br />cultural and historic resources survey has been conducted of the proposed disturbance area. <br />Response: TC had deferred a cultural resources survey for this area until ground conditions were <br />suitable for access. A survey is scheduled within the next week, and we anticipate that we should be <br />able to provide survey results and a revised page 2.04.9 within the next two weeks. <br />3. Current approved Map 29, Reclamation Map, does not include the disturbance proposed in TR-73. <br />Please provide a revised Map 29 to reflect the proposed reclamation associated with the activities <br />proposed in TR-73. <br />Response: Map 29 has been revised to reflect the proposed disturbance associated with TRIO-73. A <br />copy of the revised map accompanies these responses.