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DRMS BOND CALCULATION EXHIBIT L <br />The worst case reclamation scenario at the Revenue Mine will take place early in the mine life, <br />after the initial regrading of the Revenue waste pile is complete, and the Sneffels Diversion is <br />installed. It is assumed that the underground development for the mill and additional underground <br />storage will be completed at this point. It is at this time in the mine's life that the greatest amount of <br />earthwork needs to be conducted for successful reclamation. This includes: <br />• Grading all of the disturbed areas steeper than 3H:1 V. and connecting Sediment Pond 2 to <br />the Mine Water Pond <br />• Topsoiling of regraded areas. All of these areas will be topsoiled to a depth of 6 inches, but <br />only enough topsoil will be available from stripping on site for 1.58 acres. The remaining <br />area (9.58 acres) will require the import of topsoil. <br />• All topsoil areas will need to be seeded and mulched. <br />• The underground storage portals and mill portal will have to be backfilled with an MSHA <br />seal, and a bat gate will be installed on the Revenue tunnel portal. <br />• The HDPE pipe installed for the Sneffels Diversion will have to be removed <br />• The dry house will have to be removed. <br />Since the reclamation plan does not call for the removal of all surface facilities, and the Atlas waste <br />area will not have been developed yet, related reclamation will not be necessary. A detailed <br />breakdown of each task and its associated cost is shown in Table L -1. <br />Revenue Mine August 2012 L - <br />