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EXHIBIT D MINING PLAN <br /> 1. General Mining Plan <br /> The property boundary has been surveyed on site and the permit area will be surveyed prior to <br /> any additional acreage site disturbance. Map C-2 shows the mining plan. Mine access will be via <br /> Siloam Road/County Road 19, 15 feet wide, as it has been to this point. <br /> The gravel zone is estimated to be 6-13 feet thick in an alluvial deposit and is overlain by <br /> roughly 1-10 feet of overburden and topped by 12-49 inches of topsoil. Mining operations are <br /> expected to stop at or before a depth of 20 feet. <br /> In general, the site is mined from north to south as shown on Map C-2. The northeastern most <br /> extent of the site,just south of Hard Scrabble Creek, is already mined. Mining north of Hard <br /> Scrabble Creek represents the last phase of mining. Mining in undisturbed areas will begin by <br /> excavating topsoil and overburden with front end loaders and will be stockpiled separately. <br /> Stockpiled overburden will be used to backfill and cover the slopes of mined out areas to a <br /> 3H:1V slope during Reclamation as shown on Map F-1. The raw gravel material will be loaded <br /> into a portable crusher/screen plant where various sizes of product will be made and placed in <br /> separate stockpiles. Dozers may also be used to move topsoil/overburden or gravel. Once mining <br /> is complete in an area, it will move to the stockpiling area located near the site access in the <br /> central-eastern portion of the site. Only 5 acres will be mined at any given time with another 4 <br /> acres being used in the stockpiling area, for a total of 9 acres of current disturbed area. A <br /> breakdown of the mining areas and the mining direction are shown on Map C-2. <br /> Mining activities are expected to occur approximately 12 months per year as well as processing <br /> operations including screening/crushing and washing can occur any time of the year. Mining of <br /> the deposit will occur to the limits shown on Map C-2 and will be mined to a near vertical slope <br /> to maximize gravel recovery. Backfilling with overburden will create shallower 3H:1 V <br /> reclaimed slopes. <br /> The Yevoli Cobblestone Pit mines using a near vertical slope on active mining faces. Highwall <br /> mining will progress to an offset line from the crest line, which marks the mid-slope of the <br /> 2H:1 V mining slope. This offset serves two purposes. First, the volume of material left in the <br /> Yevoli Cobblestone Pit (.rry Ea nicks anJ 15»n.ue.,I'I I <br /> December 2018 D-I <br />