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EXHIBIT L Revised <br /> Reclamation Costs <br /> In order to calculate maximum potential reclamation liability to the State, we have selected a <br /> point in time where reclamation costs could be at a maximum. It is assumed that the time of <br /> maximum mining disturbance will be almost midway through mining activities. During this <br /> scenario, no reclamation will have been performed on the active mining face nor the near vertical <br /> side slopes on both sides of the mining face. Reclamation of the pit in the southern portion of the <br /> site will be about half way complete. This portion of the pit will need to be backfilled and <br /> graded to let stormwater flow freely through the reclaimed site. During mining, backfilling of <br /> the pit will progress in one area such that final grade will be achieved and the backfilled area can <br /> be topsoiled and revegetated prior to beginning backfilling in another area. However, in the <br /> maximum potential reclamation liability scenario, approximately half of the pit area (30.5 acres) <br /> will require additional backfill, grading, topsoiling, and seeding to create a final pit floor grade <br /> that will drain stormwater freely. <br /> The active mining area will include the active mining face, un-reclaimed pit side slopes, and <br /> un-reclaimed active mining area pit floor. This active mining area will be separate from the pit <br /> in the southern portion of the site described above. The active mining face will be near vertical <br /> with a maximum length of 1,000 feet and an average height of 10 feet. In front of the active <br /> mining face, an area 100 feet wide will have been pre-stripped in anticipation of mining <br /> (2.3 acres). In addition, a maximum 500 feet of un-reclaimed pit side slopes may be adjacent to <br /> each end of the active mine face. These side slopes will also be near vertical with an average <br /> height of 10 feet. Framed by the active mining face and pit side slopes, the pit floor (11.5 acres) <br /> will be un-reclaimed, contain overburden, raw material, and product stockpiles and, when <br /> needed, the portable processing facility and asphalt plant may be located here. During normal <br /> reclamation, the mining face and active pit side slopes would be backfilled to a minimum 3H:1 V <br /> slope. However, if mining stops at this maximum potential reclamation liability point, the mine <br /> face and pit side slopes will not be adjacent to the permit boundary and the highwalls can more <br /> efficiently be dozed to the required 3H:1 V or flatter slope. Following dozing, the areas will be <br /> rough graded in preparation for topsoil/overburden growth medium placement, final grading, and <br /> seeding for revegetation. The active mining pit floor will receive only enough topsoil/overburden <br /> backfill to establish a growth medium for revegetation. <br /> In addition to the active mining area, parts of the mine pit in the southern portion of the site will <br /> need to be backfilled, graded, topsoiled, and revegetated. To generate the material necessary to <br /> complete backfilling of the pit so that it will drain freely, additional material will need to be <br /> harvested from the un-mined portion of the site. Topsoil/overburden material will first be <br /> stripped from the material harvest area (78 acres) and stockpiled. Then the underlying <br /> overburden will be removed and used to finish backfilling the pit. Finally, the <br /> topsoil/overburden material will be replaced over the material harvest area to establish a growth <br /> medium for revegetation. <br /> Miscellaneous disturbed areas at the point of maximum potential reclamation liability will <br /> include the scale house area, internal haul roads, and the main site access road. It is estimated <br /> that the combined area of these disturbances will be approximately two (2) acres. These areas <br /> Lazy Two Pit <br /> DBMS 112 Permit Application Page 23 <br />