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EXHIBIT L <br /> Reclamation Costs <br /> To calculate maximum potential reclamation liability,we have selected a point in time where reclamation costs could <br /> be at a maximum. It is assumed that the time of maximum mining disturbance will be near the end of mining in the <br /> South cell (Phase 3). During this scenario,the slurry wall has been installed around the East and West mining cells <br /> and mining and reclamation is complete in the West cell,the South cell is partially backfilled with material generated <br /> by the mining in the west cell. The existing pond located outside the slurry wall has been backfilled with material <br /> generated from mining in the East cell and revegetated. Most of the East cell slopes have been graded with <br /> overburden material stripped from the active mining areas. There are material stockpiles on the floor of the east cell. <br /> The active mining area includes a portion of the South mining cell and the working face of the South cell. In <br /> anticipation of mining the entire South Parcel(14.7 acres) has been pre striped a dewatering trench and settling pond <br /> have been installed. The topsoil/screening berm has been installed and seeded along the northern portion of the cell <br /> adjacent the HWY 7.The South Cell is partially mined. ). The portion of the east cell requiring backfilling,sloping <br /> and final reclamation is 2,300 linear feet The area will be backfilled and rough graded to 3H:1 V slopes(assume <br /> move 1-foot of material over entire grading area)in preparation for topsoil placement,final grading, and seeding for <br /> revegetation. Material stockpiles will be located on the floor of the East cell. Haul distances to use the stockpiled <br /> topsoil will average about 300 feet. <br /> Miscellaneous disturbed areas at the point of maximum disturbance will include internal haul roads and the main site <br /> access road(3 acres),and stockpile areas(5 acres)and the conveyor route(3.3 acres). These areas will be tilled in <br /> preparation for topsoil placement,final grading, and seeding for revegetation. In addition,the South Cell is partially <br /> mined and will need backfill, placement of topsoil and seeding. It is estimated that the combined area disturbances <br /> will be approximately 88 acres. <br /> A minimum of 6 to 12 inches of topsoil or growth medium will be placed on all disturbed areas following backfilling, <br /> scarifying, and/or rough grading. Enough topsoil will be stockpiled on-site for reclamation. Final grading of the <br /> topsoil/growth medium is assumed to move one foot of material over the entire grading area and will prepare the <br /> surface for seeding. After initial seeding and the first season's growth, it is estimated that approximately 20 percent <br /> of the seeded area will need to be re-seeded. <br /> Each aspect is listed in the following table with associated disturbed area. Since all structures used in the mining <br /> operation are portable, it is assumed that removal of the structures does not have associated costs. <br /> Aggregate Industries Tucson South Resource <br /> Permit#M-2004-044112 Permit Amendment <br /> Page L-1 <br />