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Plar%(Section 2.05.4 of permit) that major disturbed areas will be returned to their approximate original <br />contour (emphasis added) and that: <br />"if the long-term spoil pile should become inactive or both A- and B-Pits would be completely <br />reclaimed before the long-term spoil pile would be completely utilized, the remaining long-tetra <br />spoil area soils will be graded and tied into the undisturbed natural terrain, and then scarified, <br />topsanded, fertilized and revegetated." <br />Based on this approach, Tetra Tech has revised the facility Reclamation Contour mtd Drainage Plan map <br />(Appendix Q-1 of the Annual Hydrology Report [AIIRJ). In general, the attached revised permit map <br />shorti•s the proposed AOC raised approximately 2.75 feet from the currently-permitted AOC in the LTSP <br />area. The revised AOC elevation contours were developed to minimize potential impacts to the current <br />drainage plan and allow drainage from the LTSP to the permanent west perimeter ditch and then to the <br />permanent Sediment Pond 2. The proposed AOC reflects fifteen (15) inches of topsand to be placed <br />above [he overburden as final cover in the LTSP. <br />Tetra Tech appreciates the opportunity to serve your environmental and engineering needs. If you have <br />am' questions regarding the proposed AOC revisions, please contact me at 303-312-S7S7. <br />Respectfully, <br />Tetra Tech EM Inc. <br />Todd Bragdon, P.E. <br />Project Manager <br />Attachments: Revised Reclamation Contour and Drainage Plan map (Appendix Q-1) <br />Electronic copy of letter report (floppy disk) <br />S:',Projec[ICEClaocrevision.doc <br />