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r <br />• <br />EXHIBIT D <br />4 <br />PAINING PLAN <br />SLAB CANYON LIngESTODiE QUARRY <br />' The Slab Canyon Quarry supplies the Idea] Cement plant at <br />;' Boettcher, Colorado with a limestone having a higher than normal <br />content of calcium carbonate. It is used in the manufa~;ture of <br />' specialty and other types of Portland Cement and supplements the <br />locver-grade Niobrara limestone quarried nearer the plant. <br />' Actual quarry uperations at the Slab Canyon deposit vrill <br />be intermittent as the need arises for this particular type of <br />limestone and when men and equipment become available tc do the r,=ork. <br />' The SLAB CANYOII QUARRY WILL BE l4'ORIiED FOR LESS THADI lE0 DAYS PER YE.4°. <br />The limestone at Slab Canyon occupies the crest and eastern <br />' slope of a ridge located about one mile west of Boxelder Creel:. <br />The limestone forms a dip slope of about 15° to the east. It <br />' averages 15 feet in thickness. 3g the area presently being quarried <br />' there is a 15-20 feet of red .sandstone overburden; elsewhere, the <br />limestone is exposed at the surface. <br />' Ideal will continue the mining plans of Ernest ;7. I;funroe <br />who has operated this quarry up to this present time. The plan <br />involves the removal of limestone from a strip of land approx.imatiely <br />' 100 feet wide along the strike of the limestone along the trend o^ <br /> the ridge. ri rst, the sandstone overburden is drilled and blasted,, <br />' and the broken material is then case or hauled to the area below <br /> from which the commercial limestone has been removed. After the <br />1 <br /> overburden has been removed, the limestone is drilled and blasted <br />' at~~l loaded on trucks for dalivery Lo the point of use. <br /> <br />