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1.0 PHASE I BOND RELEASE <br />This application for Phase I bond release of applicable Trapper Mine lands is submitted in accordance with <br />the Colorado Division of Reclamation, Mining and Safety (DRMS) Rule 3.03 (Release of Performance <br />Bonds) and Guideline Regarding Selected Coal Mine Bond Release Issues of April 18, 1995. With this <br />submittal, Trapper is proposing to release 175.5 acres of land, reclaimed from 2014 through 2016 from <br />Phase I bond liability as outlined on Map 1.0. This includes all lands that have been regraded, with <br />drainages reestablished in accordance with Trapper's approved permit document (C-81-010), as outlined <br />on Map 1.0. <br />1.1 Post -mining Topography Demonstration <br />Map 1.0 provides as -built post -mining topography contours for all Trapper Mine lands regraded through <br />2016. The map was constructed from aerial photogrammetry data collected in October 2016 and as built <br />topography derived from the CAT® MINESTAR' System onboard GPS installed in the on-site dozers. <br />Representative cross sections comparing as -built topography with approved topography would be the same <br />as those given in Permit Document C-81-010; therefore, no cross sections are included in this application. <br />1.2 Drainage Reestablishment Documentation <br />As explained in Section 1.1 for topographic cross-sections, drainage profiles comparing as -built and <br />approved drainage profiles will likewise be the same as those given in C-81-010. All reestablished <br />drainages are delineated on Map 1.0. <br />Trapper Mine has spared no effort and expense in constructing reestablished drainages that effectively <br />control erosion and downstream sediment deposition. A variety of sediment control materials and methods <br />and sediment reducing measures have been implemented on reestablished drainages. <br />Rock check structures are used to dissipate the energy of flowing water within drainage channels. Debris <br />and sediment tend to be deposited and trapped upstream of structures. This in turn permits establishment <br />of vegetation behind structures which further stabilizes the channels. In addition, core trenches are installed <br />in rock check structures, thus providing additional structural support and reducing the potential of <br />downstream headcutting to move upstream. Subsequent establishment of permanent vegetation in <br />reconstructed drainages insures future channel stability. <br />This combination of appropriate conservation measures coupled with an effective drainage repair program <br />insures successful establishment of reconstructed drainage channels at Trapper Mine. <br />1 <br />