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EXHIBIT D <br />Mining Plan <br />1. Geology <br />The proposed operation will mine a sand and gravel deposit which is an alluvium of the <br />recent period of Quaternary age. The alluvium is relatively shallow and is underlain by <br />the sandstones, siltstones and mndstones of the Wasatch Formation. These sedimentary <br />layers were formed when uplifting Rocky Mountains to the east blocked eastward <br />drainage during Tertiary time and the Uinta Mountams blocked northward drainage and a <br />very large lake formed in northwest Colorado, northeast Utah and southwest Wyoming. <br />This lake is referred to a Lake Uinta and it received all the washout material from river <br />floodplains and deltas from the mountains on all sides of the lake. Some of the later mud <br />which entered the lake became what is now the Green River Shale, which is. noted for its <br />oil content. The Green River Shale forms the hill immediately south of the permit area. <br />Lake Uinta lasted for 6,500,000 years until further uplifts drained it. <br />2. General Mining Plan <br />The gravel seam for the entire pit is approximately 18.5 feet thick and is overlain by 1.0 <br />feet of topsoil and approximately 4.5 feet of overburden. Mining operations (crushers, <br />conveyors, dozers and scrapers) will be located in the Southern portion of the phase being <br />mined. <br />Topsoil and overburden will be kept separate by storing them in separate stockpiles until <br />they are used for reclamation. Utilizing dozers, scrapers and front end loaders, the topsoil <br />will be stripped and placed in a berm along the westerly side of the project. The <br />overburden will be removed in phases and stockpiled in easterly portion of the next phase <br />to be mined. No overburden or topsoil will be stockpiled along the river banks, to ensure <br />that the natural f loodways will not be affected. All topsoil piles will be seeded with a <br />temporary seed mix with a tackifier if they will be left for over 1 year without <br />redisturbance. Weeds will be controlled in all disturbed areas and on the entire site. <br />The raw gravel material will then be loaded into a crusher and screening plant and/or <br />washing plant where various sizes of product will be sorted and placed in separate <br />stockpiles. There will be no blasting as part of this operation. Mining will proceed in <br />general from the east to the west. Overburden will be replaced in the bottom of each <br />phase as the operation moves to the next (for details, see Exhibit F, Reclamation Plan). <br />All mining and processing operations will be designed to manage storm water runoff, so <br />that no sediments flow to existing drainage. To ensure that water from inside the <br />operation does not leave the site, isolation berms will be created as needed around the pit <br />(these will also serve as sound barriers). The mining operation will proceed with side <br />slopes of 2:1.