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DATA <br />Area <br />(UNITS AC., LFT) <br />EXPLANATION <br />RECLAMATION ACTIVITY <br />Flat <br />I Plant Site <br />TOTALS <br />REBOIL (ac.) <br />3.00 <br />3.00 <br />6.00 <br />REVEGETATE (ac.) <br />3.00 <br />3.00 <br />6.00 <br />Root zone (cy) <br />4840.00 <br />4840.00 <br />9,680.00 <br />RESOIL VOLUME (cy) <br />2420.00 <br />2420.00 <br />4,840.00 <br />UNDISTURBED (ac.) <br />15.00 <br />0.00 <br />15.00 <br />DATA <br />EXPLANATION <br />I QUANTITY <br />I UNITS <br />Soil depth <br />6 <br />Inches <br />Root Zone depth <br />12 <br />inches <br />Soil Swell factor <br />1.12 <br />L <br />REC <br />RECLAMATION COSTS <br />This reclamation cost estimate in based on the assumption <br />that there will be no more than 6.00 acres ± needing resoiling <br />and revegetation at any one time and that exterior slopes were <br />created as mining progressed. This also assumes that the rock <br />face is worked at 1:1 slope leaving a face that does not need <br />sloping if mining ends prematurely. The overburden slope is <br />based on an average depth of 15 feet at 3:1 and 500 feet long. <br />All other slope grading would be completed as mining progresses. <br />The following information depicts a time shown on Map <br />Exhibit C -1 Mining Plan Map, when the disturbance will be limited <br />to 6.00 acres or less. The table below outlines the various <br />areas of disturbance at that time. This is an attempt to set the <br />bond so there is flexibility to operate the mine without reevalu- <br />ating the bond yearly. <br />According to our scenario, we will have to place 10841 cubic <br />yards of crusher fines as root zone and respread 5397 cubic yards <br />of soil on 6.00 acres of disturbed area; and revegetate 6.00 ac. <br />±. The amount of soil that will be re- spread is based on an <br />average of 6 inches and the depth of the root zone would be 12 <br />inches average. Our cost estimate to do all of the shaping and <br />soiling in this cost estimate is based on using a Caterpillar <br />627G scraper for resoiling and root zone placement, and a Cater- <br />pillar 140G motor grader to prepare the seedbed after resoiling <br />is complete. A Caterpillar D6 -T is used for sloping. The actual <br />equipment used by the permittee may differ. These figures are <br />then used in the calculations for the bond amount. The revegeta- <br />tion cost figure includes grass seed, mulch, chemical fertilizer <br />(ammonium nitrate & superphosphate) and seed drilling costs. The <br />mobilization number is for a round trip from the Trinidad area <br />(12.5 miles one way.) <br />EXHIBIT <br />72 <br />EXHIBIT L <br />LAMATION COSTS (cont) <br />