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GoodMiller #2 Pit 112c Permit <br />MINING PLAN <br />General Mining Plan <br />EXHIBIT D <br />The existing site consists of dry rangeland. The surrounding area is also dry rangeland although <br />the County operates a small gravel pit immediately to the east of the NE corner of this proposed <br />permit. Map C -1 shows the current site as of October 2014. The detailed site survey was completed <br />in that month. The permit area is bordered on the north by an existing fence, on the east by an <br />existing fence and CR115. A fence will be installed along the southern boundary and a berm will <br />be installed along the western boundary at the daylight point of the gravel. Adjacent landowners <br />to the land where the GoodMiller #2 Pit expansion is located are shown on Map C -1. Access to <br />the mining area will be from an existing access road connecting to CR 115. Map C -1 shows the <br />current status of the site where mining has taken place under the approved permit. The annual <br />production is estimated to average 500,000 tons per year, but could vary according to demand and <br />other permit requirements. <br />The gravel deposit's thickness is unknown for the GoodMiller #2 Pit, but it is believed to be <br />approximately 30 -40 feet. An estimated gravel depth and bottom has been shown in the mining <br />and reclamation maps. The actual depth of the pit may vary. The lateral extent of the gravel <br />deposit is also unknown, however, the daylight of the gravel deposit has been estimated on Map <br />C -2. Its actual location may vary. If the bottom of the deposit does not daylight along an edge of <br />the permit boundary, a cut slope will be developed against the permit boundary similar to the slope <br />along the eastern edge. <br />The groundwater level has not been intersected onsite, and excavations have taken place down to <br />over 20 -25 feet. Since this operation does not plan to expose groundwater, the operation will stay <br />at least 2 feet above the groundwater level at all times. If ground water is intersected the pit floor <br />will be backfilled to 2 feet above the exposed water. Below the gravel is a clayey silty zone of <br />unconsolidated material which is underlain by the shales and siltstones of the Laramie Formation. <br />Mining will start by scrapers stripping the topsoil and piling along the perimeter of the pit areas or <br />by directly placing the topsoil into areas being actively reclaimed. Topsoil is a minimum 6 -8" in <br />thickness. Overburden will then be stripped via scraper and stockpiled separately from the topsoil. <br />GoodMiller #2 Pit Dec 2014 D -1 <br />