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EXHIBIT D <br /> Mining Plan <br /> 1.Geology <br /> The site will mine sand and gravel deposit which is an alluvium of the recent period of <br /> Quaternary age. The alluvium is relatively shallow and is underlain by the sandstones, <br /> siltstones and mudstones of the Wasatch Formation. These sedimentary layers were <br /> formed when uplifting Rocky Mountains to the east blocked eastward drainage during <br /> Tertiary time and the Uinta Mountains blocked northward drainage and a very large lake <br /> formed in northwest Colorado,northeast Utah and southwest Wyoming. This lake is <br /> referred to a Lake Uinta and it received all the washout material from river floodplains <br /> and deltas from the mountains on all sides of the lake. Some of the later mud which <br /> entered the lake became what is now the Green River Shale,which is noted for its oil <br /> content. The Green River Shale forms the hill immediately south of the permit area.Lake <br /> Uinta lasted for 6,500,000 years until further uplifts drained it. <br /> 2.General Mining Plan <br /> The gravel seam for Phase I is approximately 10 feet thick and is overlain by 0.5 feet of <br /> topsoil and approximately 3 feet of overburden.The gravel seam for Phase 2 is <br /> approximately 8 feet thick and is overlain by 0.5 feet of topsoil and approximately 6 feet <br /> of overburden. For both Phase i and Phase 2 the mining operations(crushers, conveyors, <br /> dozers and scrapers)will be located in the Westerly portion of the respective gravel pit <br /> area. Utilizing dozers, scrapers and front end loaders, the topsoil will be stripped and be <br /> placed in berms along the North side of the project as a buffer along the steep <br /> embankment to the river valley. All topsoil piles will be seeded with a temporary seed <br /> mix with a tackifier if they will be left for over I year without redisturbance. Weeds will <br /> be controlled in all disturbed areas and on the entire site. The overburden will also be <br /> removed and stockpiled.The raw gravel material will then be loaded into a crusher and <br /> screening plant and/or washing plant where various sizes of product will be sorted and <br /> placed in separate stockpiles. There will be no blasting as part of this operation.Mining <br /> will proceed in general from the west to the east. The overburden will be replaced in the <br /> bottom as the operations moves to the east. All mining and processing operations will be <br /> designed to manage storm water runoff, so that no sediments flow to existing drainage. <br /> To ensure that water from inside the operation does not leave the site, isolation berms <br /> will be created as needed around the pit. The mining operation will proceed with side <br /> slopes of 2:1. <br /> It is extremely unlikely that any toxic or acid-producing materials will be encountered <br /> during the mining operation since the material is alluvial in nature. However, in the event <br /> that such materials are encountered, they will be covered with subsoil from the stockpiles <br /> to the same depths outlined in the reclamation plan and no more mining will occur in this <br /> particular area. <br /> 7 <br />