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Exnisrr D <br />Mwwo PwN (coNr) <br />,u®® nvua 2oa2 <br />hillside as mining moved into the northwest corner. The eleva- <br />tion of this area will not be mined to its final level initially, <br />but rather will be mined to the level of the adjoining floor and <br />later lowered to its final elevation as mining progress. <br />Once the face is removed mining would then begin to the <br />northwest into the Frei Lake area and the north-south face could <br />then be gradually oriented so it is less visible from the south. <br />In this area the mine walls will be like what is permitted at <br />this time. In the two areas where vertical benches will be left, <br />the overall bench slopes (horizontal to vertical) may vary <br />between Oh:ly and l.lh:ly. The Pre-Mining Plan Map - Map Exhibit <br />C shows what the existing natural slopes are, about 0.8h:1v in <br />certain places along the south end of the property, and approxi- <br />mately how the site looks at this time. <br />From the digline to the top of the reservoir the benches <br />will be created in an irregular pattern to breakup the straight <br />line regularity normally associated with a quarry. A level area <br />approximately 40 feet wide will be left around the reservoir and <br />the slopes into the bottom will be mined 3h to lv. This area is <br />in the building envelope area and would be graded and shaped <br />until developed. <br />Mining would then progress to the east thru the new area. <br />Along this north side mining will change. The plan is to create <br />a series of uniform benches. They will be higher and longer with <br />trenches excavated on the flat surfaces to facilitate reclama- <br />tion. It is anticipated that large amounts of finer material <br />that has no market will be available as the mine progresses and <br />this will provide a place to dispose of it. To do this the south <br />facing slope will be mined using 60' high by 180' wide benches <br />that will be Backfilled with the overburden and fines created <br />during processing. The trench to be mined on the benches will <br />act as a "key" to lock the compacted fill so it creates a stable <br />5 <br />