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EXHIBIT D MINING PLAN <br /> 1. General Mining Plan <br /> The property boundary was surveyed onsite and the permit area will be surveyed prior to any site <br /> disturbance. Map C-2 shows the mining plan. Mine access will be via the Westbound I-70 on <br /> ramp,the current site access point. <br /> The gravel zone is estimated to be 200+feet thick in an alluvial deposit and is overlain by <br /> roughly 12 inches of gravelly loamy sand. Mining is expected to proceed to a total depth of 200 <br /> feet, with the potential to go lower as ground water allows. This application does not anticipate <br /> mining below the ground water horizon that is over 200 feet below the current surface. <br /> Mining will be conducted from the southeast end of the site northwards and westwards. Due to <br /> the deposit size, 20 years of mining are possible. The initial mining cut will be roughly 30 acres <br /> in size. Mining will continue from this initial cut,that will be in the southeast end of the gravel <br /> terrace, northerly and westerly towards Empire and the West Fork of Clear Creek. The resultant <br /> mine pit will have overall side slopes of 3H:IV, and will serve to obscure mining activities and <br /> their impacts from the surrounding community. The active highwall may be steeper when <br /> actively being excavated. <br /> Once mining in an area reaches full depth, reclamation of the mined out portions of the slope will <br /> begin. The crest of each cut will be knocked down with a dozer to create the final 31-1:1 V <br /> reclamation slope. Following mining and reclamation of the initial cut, onward reclamation will <br /> be conducted concurrent with mining. This will reduce material moving as well as reduce the <br /> maximum area to be reclaimed. A timetable for the mining operation can be seen in Table D-1. <br /> Processing fines, overburden (if encountered) and imported fill may be used to backfill all <br /> mining slopes to 31-1:1 V reclamation slopes. <br /> Mining activities are expected to occur approximately 9 to 12 months per year as weather <br /> permits. Processing operations including screening/crushing and washing can occur any time of <br /> the year. Sales of product material is expected to occur throughout the year. <br /> DMR - <br /> April 2018 D-1 <br />