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- EXHIBIT D <br />Mining Plan <br />1. Geolopy <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 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. For Phase 1, Phase 2 and Phase <br />3 the mining operations (crushers, conveyors, dozers and scrapers) will be located in the <br />Southern portion of the respective gravel pit area. Utilizing dozers, scrapers and front end <br />loaders, the topsoil will be stripped and be placed in a berm along the westerly side of the <br />project. All topsoil piles will be seeded with a temporary seed mix with a tackifier if they <br />will be left for over 1 year without redisturbance. Weeds will be controlled in all <br />disturbed areas and on the entire site. The overburden will be removed in phases and <br />stockpiled in easterly portion of the next phase to be mined. No overburden or topsoil <br />will be stockpiled along the river banks, to ensure that the natural floodways will not be <br />affected. The raw gravel material will then be loaded into a crusher and screening plant <br />and/or 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. The stockpiled 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 a "clinker rock" in nature. However, in <br />the event that such materials are encountered, they will be covered with subsoil from the <br />stockpiles to the same depths outlined in the reclamation plan and no more mining will <br />occur in this particular area. <br />7