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<br />' the depth of water makes it ultimately impractical to~ mine using this type <br />of equipment, a small dragline may be used. <br />' The life of the mine, based on the present demand for materials, is <br />' estimated to be from about 10 to 12 years; the actual rate of mining will <br />depend on the changing demand for materials. The best current estimate for <br />phasing of the operation is provided as follows: <br />' Phase and Acreage Mining Period <br />Phase 1 - 21.3 ac.# 5 - 6 yrs. <br />Phase 2 - 15.4 ac. 5 - 6 yrs. <br />1 <br /> '* A portion to remain undisturbed. <br /> As noted in Exhibit J, trees, mostly scrub oak, border the westerly <br /> side of the current pit. Prior to mining in a particular phase, the trees <br />1 <br /> will be cut and used by the operator for firewood. <br />' For the majority of the area to be affected, no topsoil was salvaged <br /> from previous workings. Topsoil may be salvaged from a portion of the <br />' permit as the pit is expanded slightly on a westerly direction and in an <br /> easterly direction. Topsoil on both of these new areas averages <br /> hi <br />k <br />Th <br />il <br />ill b <br />l <br />i <br />h <br />i <br />h <br />i <br /> ness. <br />w <br />e <br />approximate <br />y e <br />g <br />t to ten <br />nc <br />es <br />n t <br />c <br />e so <br />' stockpiled around the perimeter of the affected area as noted on the <br /> Exhibit C map. As a stabilization measure, any topsoil which is to remain <br />t in a stockpile longer than one growing season will be broadcast seeded with <br /> a perennial sod-forming grass cover such as western wheatgrass at a rate of <br />1 2 <br />d <br />/ <br /> 0 poun <br />s <br />acre. <br />' Conventional equipment will be used for mining the material: D-7 or <br /> D-8 dozer, 966 frontend loader, and haul trucks. A mobile scale house will <br /> <br /> <br />