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Mining Plan 1. Geolot=_v REC~w~~FD DEC 2 7 2006 Division of Reclamation, Mining and Safety Exhibit D The site will mine a sand and gravel deposit which is an alluvium of the recent period of Quaternary age. The alluvium is relatively shallow (less than 25 feet thick) and is underlain by the sandstones, siltstones and mudstones of the Wasatch Formation. These sedimentary layers were formed when uplifting Rocky Mountains to the east blocked eastward drainage during Tertiary time and the Uinta Mountains blocked northward drainage and a very lazge lake formed in northwest Colorado, northeast Utah and southwest Wyoming. This lake is referred to as Lake Uinta and it received all the washout material from river floodplains and deltas from the mountains on all sides of the lake. Some of the later mud which entered the lake became what is now the Green River Shale, which is noted for its oil content. The Green River Shale forms the hills immediately south of the permit azea. Lake Uinta lasted for 6,500,000 years until further uplifts drained it. 2. General Mining Plan The gravel zone is approximately 21 feet thick in an alluvial deposit and is overlain by topsoil which averages 1.0 to 1.5 feet in thickness with approximately 2-8 feet of overburden until the gavel deposit is reached. Higher overburden exists in the southeast corner of the property, which will be part of the facilities area which will not be mined. Sand and gravel aze the products mined from this site. In general, the area will be mined by first excavating any salvageable topsoil with a dozer or front end loader and stockpiling it within the permit azea as shown on Map C-2. The topsoil piles will have slopes no greater than 3H:1 V. Overburden will also be removed and stockpiled. The raw gravel material will then be loaded into a crusher & screening plant and/or washing plant where various sizes of product will be sorted and placed in separate stockpiles. Dozers may also be used to move topsoil or gravel. There will be no blasting as part of this operation. YYhite River City Pit December 06 D-1