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RECLAMATION COSTS <br />1W.462rr:10r1 <br />The maximum bond reclamation scenario will occur when the north platform above the Denver <br />Water tunnel is mined out. This area will require the largest amount of backfill. At this point in <br />time, Asphalt Paving Co. will have the 1.2 million cubic yards of material available to backfill <br />the north platform and construct the vegetation islands along the quarry slopes. Topsoiling will <br />involve the placement of screened topsoil on disturbed areas. Revegetation of disturbed areas <br />using the approved seed mixes will be completed once all backfilling, grading, and topsoiling is <br />done. Broadcast seeding or hydroseeding will be used, and mulch applied as well. <br />Backfill <br />Maximum bond volume of backfill needed 1,000,000 CY <br />Topsoil <br />North platform (12 inches over 10.5 acres) 16,940 CY <br />Processing area (12 inches over 67.4 acres) 108,755 CY <br />Vegetation islands 10,000 CY <br />Material available on site 1,200,000 CY <br />The permanent facilities that needed to be removed in the worst case scenario of this exhibit <br />include the asphalt parking lot and the facilities listed in Table L -1. All other equipment on site is <br />portable. <br />The backfill requirements for the bond calculation were determined using CAD software, the <br />volume report is attached. <br />Ralston Quarry, February 2015 L -1 <br />