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->e°.~-•~ •-~ V `~. F~~': i ~ ~ Zl;u~ Diaision of Redain<<ion, EXIIIBIT D -Mining Plan Mining and Safety Note: Phase 1 (including the Byzantine Quarries 110 Pit 1: DRMS Permit M2006-020) and the stockpile/crusher area are the only portions shown on the mining plan maps for which a permit is being sought in this application. Should expansion into the remaining mine Phases be desired, such expansion will be sought in permit amendments. (a) The limestone and granite rock material to be mined will be drilled and blasted to specified rough size, then sorted and piled by a tracked bulldozer to rip rap (over-size) and crusher-sized piles. A wheeled front-loader will be used to load the crusher intake hopper, and place piles of sorted rip rap. Crushed and screened rock and reject-fines will be conveyed to stockpiles by means of belted conveyors and stackers and sometimes by front-loader. (b) The in-place thin surface soil with included vegetation and loose rock will be bulldozer- stripped from each current excavation and process area to a stockpile or stockpiles for post- mining reclamation surface preparation. Earthwork is anticipated to be relatively minimal due to the very shallow soils at the site. (c) No surface watercourses are involved at the excavation and processing sites since the extraction will be to the southwest into the northeast flank of a steeply west-inclined hogback • with an adjacent leveled bench at the foot thereof for processing operations. Incumbent rainfall will be diverted to a sump created in the southeast (lowest) portion of the previously mined pit for retention and percolation. (d) Mining will progress following the northeast/southwest contour along the bottom of the slope of the Twin Mountain Hogback. Benches will be blasted to the southwest into the solid limestone and/or granite as shown on Maps C-3 and C-4 in Exhibit C. Subsequent benches will be progressively blasted towazd the southwest. For the initial mining, a workable face of up to 300 feet wide (to the southwest) by up to 300 feet long (northwest along the toe of the slope) will be drilled and blasted into the northeast facing slope of the inclined hogback. Initial mining will likely begin at the location of the existing quarry (CRMS Permit M2006-020). The initial blast will be drilled vertically to the elevation of the processing bench and current pit floor at the foot of the slope. Successive blasts will extend the initial working bench to the northwest along the contour of the hogback to the limit of Phase 1. Once the initial working face has been established along the toe of the hogback in Phase 1, successive blasts back into the slope will follow in 30-foot vertical bench faces, at the 55 feet overall bench width (see Map C-3 in Exhibit C). The size of the area to be worked at any one time will vary, but is anticipated to be less than ten acres. n LJ