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EXHIBIT D <br /> Rule 6.4.4 <br /> Mining Plan <br /> (a) Description of the method(s) of mining to be employed in each stage of the operation as <br /> related to any surface disturbance on affected lands. <br /> Currently,pursuant to DRMS Permit No. M-2023-022,the existing site is permitted under a 110c <br /> limited impact reclamation permit, consisting of approximately 9.99 permitted acres located in <br /> Section 27, T3S, R63W, 6th P.M. in Weld County, Colorado. Pursuant to this application, the <br /> expanded site ("Extraction Site")will encompass approximately 335 acres also in Section 27, and <br /> include part of Section 34, T3S R63W, 6th P.M. <br /> The existing site was basically an exploration permit which was too large to fit under the Notice <br /> of Exploration guidelines, so it was permitted as a 110c Frac Sand extraction test area. The site <br /> proved to be viable therefore, this application will expand the site to a 112c application with the <br /> new permit area overlaying the 110c boundary and expanding out further east, north and south of <br /> the existing area. The proposed 112c will encompass approximately 335 acres as shown on the <br /> various maps accompanying this application. <br /> The site is located in an area of Eastern Colorado consisting of aeolian sandhills located generally <br /> between Weld County Road 49 on the West, Interstate 76 on the south, U. S. Highway 34 on the <br /> North and more or less, Empire Reservoir along the East. It is similar to other sand hill areas <br /> scattered across Eastern Colorado from the Wyoming border on the north to the New <br /> Mexico/Oklahoma border on the south, in that it is aeolian deposited sands presently covered with <br /> typical Eastern Colorado rangeland vegetation including numerous native grasses and small shrubs <br /> such as sagebrush. The sand under these dunes is the target of this mining operation. This sand <br /> has a consistency that makes it conducive to its use as Frac Sand in Oil and Gas operations <br /> primarily in Weld County.The proposed mining operation will involve stripping and reserving the <br /> available topsoil,removing the sand deposit down to an elevation that will leave two(2)feet above <br /> the historic groundwater elevation at final reclamation, re-grading the mined area, replacing the <br /> topsoil and reseeding with native grasses. The post-mining topography will be relatively level <br /> compared to the existing topography which is rolling sandhills. The slopes abutting the adjacent <br /> undisturbed lands will be reclaimed to 4H:1V leading down to the relatively level pit floor. <br /> Mining will be done using some combination of the following equipment to include front-end <br /> loaders,bull-dozers, scrapers,road graders and trucks, including articulating mine site trucks.The <br /> site will be divided into 16 units with a main haul road eventually bisecting the site from north to <br /> south. This road will be constructed as necessary as each new sequence is mined. The units will <br /> be divided more or less equally on both sides of this road with the North Section consisting of <br /> units A-E and the South Section consisting of units G-P. As can be seen from the mining plan <br /> sequence map(See Exhibit D(2),mining will begin in Unit A followed by set-up of the processing <br /> facility in the initial mined area which is centrally located relative to the rest of the units.The plan <br /> for this site is to use contemporaneous mining methods so that once the site is opened up,topsoil <br /> CoProp LLC—Rodeo Dunes Mine Page 1 of 5 <br /> Construction Materials Regular Operation(112(c))Reclamation Permit Application Form <br />