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III. APPROVAL CRITERIA FOR BOND RELEASE <br /> Phase I Bond Release <br /> Rule 3.03.1(2)(a) states: <br /> "Up to sixty percent of the applicable bond amount shall be released when the permittee <br /> successfully completes backfilling,regrading, and drainage control in accordance with the <br /> approved reclamation plan." <br /> Trapper Mine accomplishes backfilling of the mined pits primarily with draglines,using overburden <br /> and inter-burden material from a cut to backfill a previous, adjacent cut. Other equipment such as <br /> bulldozers, scrapers,backhoes, front-end loaders and trucks are also used to backfill areas. Once <br /> backfilled,bulldozers and/or graders grade the area to achieve approximate original contour. The <br /> approved reclamation plan for the Trapper Mine calls for backfilling and grading mine excavations <br /> and shaping the backfilled areas to the approximate configurations shown on the Post mining <br /> Topography Map,Map M12 in the permit. Graded areas are to blend into the surrounding adjacent <br /> areas. Every year TMI submits to the Division their Annual Reclamation Report(ARR) revising <br /> Appendix W of the permit. Each ARR includes a map showing actual post-mining topography from <br /> the previous year. <br /> Topographic cross sections, drainage profiles comparing as built and approved drainage profiles will <br /> be the same as those given in the permit. All reestablished drainages are delineated on Map 1. TMI <br /> has spared no effort and expense in constructing reestablished drainages effectively controlling <br /> erosion and downstream sediment deposition. Various sediment control materials and methods and <br /> sediment reducing measures have been implemented on reestablished drainages. Drainages at <br /> Trapper Mine are trapezoidal in shape with a bottom width of 20 feet, grass lined with regularly <br /> spaced check dams. Rock check structures dissipate the energy of flowing water within channels. <br /> Debris and sediment deposition occurs upstream of structures allowing vegetation to establish behind <br /> structures, further stabilizing the channels. This configuration results in shallow flow depths for the <br /> design storm and low flow velocities. Rock Channel slopes are generally 10 percent. Detailed <br /> engineering criteria regarding drainage reconstruction practices can be found in TMI's permit <br /> Appendix Q Section XXXVII. <br /> All lands requested in the current Phase III bond release application, SL23,received Phase I bond <br /> release as per Table 2 above. <br /> Phase II Bond Release <br /> Rule 3.03.1(2)(b) states: <br /> "Up to eighty-five percent of the applicable bond amount shall be released upon the <br /> establishment of vegetation supporting the approved post-mining land use and meeting the <br /> approved success standard for cover based on statistically valid data collected during a single <br /> year of the liability period." <br /> And,regarding Phase II bond release,Rule 3.03.1(3)(b) states: <br /> "No more than (60)percent of the bond shall be released so long as the lands to which the release <br /> would be applicable are contributing suspended solids to streamflow or runoff outside the permit <br /> Permit Number. C1981010 Page 7 of 16 <br />