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Amendment of M-84-041 Exhibit D page 2 <br />The ore body is nearly free of overburden, with the exception of <br />one to two feet of weathered gypsum containing residual clastic <br />sediment material and minimum vegetation. Some areas of the top <br />of the ridge contain thin layers of volcanic ash up to 3 feet <br />thick overlaying the one to two feet of weathered gypsum. The <br />volcanic ash areas contain the greatest concentration of <br />vegetation. <br />III SITE PREPARATION <br />In preparation for mining in the new area, the following <br />development work must be accomplished: (letter designation points <br />referred to in this discussion are shown on sheets 1 and 2 of the <br />MINE PLAN maps and sheets 1 and 2 of the RECLAMATION PLAN maps.) <br />(a) Construct the haul road from point A to <br />length of approximately 5400 feet. The road <br />with a 22 to 24 foot driving surface, inside <br />outside wheel berm. The road alignment from <br />54+00 will be periodically relocated, in the <br />accommodate access to the mining surface. <br />point B for a total <br />will be a double lane <br />drainage ditch and <br />station 46+00 to <br />course of mining, to <br />(b) Clear the north mining area of area (C), the portion of area <br />(D) which will be excavated in conjunction with the gypsum ore to <br />serve as a road and mine transition area as the mining surface <br />lowers, the northern end of area (E) which will be used to <br />stockpile overburden-topsoil and waste rock, and area (F) which <br />will be used to stockpile overburden-topsoil and area (I) which <br />will be used for processing and stockpiling gypsum rock products. <br />(c) Strip the first mining area in area (CI and stockpile the <br />overburden-topsoil in areas (E) and (F). Strip and stockpile the <br />topsoil from the first waste rock stockpile area in area (E) and <br />stria and stockpile the topsoil on area (I). It is estimated that <br />the overburden-topsoil stockpile quantities will be as follows: <br />area (E) 9,000 cubic yards <br />area (F) 11,000 cubic yards <br />area (I) 12,000 cubic yards <br />Since the majority of the material in these stockpiles will remain <br />undisturbed for many years, the side slopes will be graded to a <br />maximum slope of 1.5:1 to 2:1 (H to V) to accommodate seeding and <br />revegetation. <br />JEROME F. GAMBA & ASSOC. <br />CONSULTING ENGINEERS <br />