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Moonscape Pit, November 2023 <br /> MINING PLAN EXHIBIT D <br /> 1.General Mining Plan <br /> All mining has been completed in the western portion of this pit. There remains 5.64 acres <br /> unmined in the eastern side of the pit. This area is currently at the original elevation of the un- <br /> mined mesa. It is approximately 14 feet above the mined out area to the west. The eastern <br /> most 1.84 acres of that 5.64 acres will not be mined. It is currently used as the topsoil stockpile <br /> area and will be graded to its pre-permit level when the topsoil stockpile is removed. These <br /> areas are shown on Exhibit C. <br /> Mining of the remaining 3.80 acres will begin in the north end and proceed east to the west <br /> boundary of the topsoil stockpile area, then south till all minable gravel in that 3.80 acres is <br /> mined. The 4—8 inches of topsoil will be stripped and moved to the stockpile area or placed <br /> directly on the 3H:1V slopes created along the north and east boundaries of the excavated area. <br /> Approximately 1 foot of overburden will be excavated along with approximately 12 feet of <br /> gravel and hauled to the directly to the crusher or stockpiled on the pit floor with a frontend <br /> loader. Removal of this material will leave a pit floor that matches elevation and slope of area <br /> already mined to the west. Final grading of the pit floor will leave a 1 to 2%grade from the <br /> 3H:1V slopes on the east to the day lighted slopes on the west. No backfill will be needed to <br /> achieve this final grade. Other equipment used on site may include dozers, excavators and <br /> gravel trucks. The overburden will be incorporated in finished gravel products. There is <br /> expected to be about 3,000 cubic yards of topsoil and 75,000 to 80,000 cubic yards of gravel. <br /> Product will be crushed and stored in pit areas previously mined. All final slopes around the <br /> outer perimeter of the mined area will be mined 3H:1V to reduce the amount of reclamation <br /> required after mining. <br /> Highway trucks will haul sellable material to market from the processing site. Truck traffic will <br /> use Sundown Road. <br /> 2.Mining Timetable <br /> With 75,000 cubic yards of gravel is approximately 110,000 tons of product. Gray Rock <br /> anticipates 15,000 to 20.000 tons in sales at this time. This makes the remaining life of this <br /> mine 5 to 7 years. <br />