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disturbance will require approximately 7,251 cubic yards of plant growth <br /> material. However, only 2,151 cubic yards of plant growth material is <br /> available from the two soils units. Therefore, there is a short fall of <br /> approximately 5,100 cubic yards. <br /> • To address the shortfall, SEMA has two options. <br /> ➢ Option 1: SEMA will use available plant growth material and <br /> augment what is available by using the subsoil material, once the borrow <br /> material is removed. This Option may also include amending the plant <br /> growth material, as needed, to ensure the resulting composite plant <br /> growth material will allow for the establishment of the seeded plant <br /> species and ensure the post mining land use, rangeland. <br /> ➢ Option 2: This Option is a combination of Option 1 and may include <br /> the haulback of plant growth material from the offsite CDOT <br /> construction project. The material returned to the site will be excess <br /> material not needed for the CDOT construction project, clear of any <br /> contamination and where noxious weeds are not a significant problem. <br /> (This permit application includes a noxious weed control program in the <br /> event there is a problem with noxious weed.) <br /> • Two topsoil stockpiles are proposed for the borrow site as shown on the <br /> Mine Plan Map. <br /> • The topsoil stockpiles will only be graded (sloped) and seeded if the <br /> stockpiles are to be left for more than 9 months. <br /> (c) Specify the thickness of overburden or quantity of waste rock, if any, to be <br /> removed to reach the deposit. The location of any overburden stockpiles or <br /> waste rock fill must be shown on Exhibit E—Map: <br /> • This mining operation is a borrow pit. With the exception of the plant <br /> growth material removed for site reclamation, all excavated material will be <br /> used as borrow material. <br /> • The approximate maximum depth of excavation is 20 feet. <br /> (d) Specify the thickness of the deposit to be mined: <br /> Maximum removal depth will be approximately 20 feet. We plan to remove up to <br /> 250,000 cubic yards of material. <br /> (e) Describe the major components of the mining operation such as: roads, <br /> access routes, pit, office, shop/maintenance buildings, plant, processing <br /> facilities, and any underground openings such as adits or ventilation facilities. <br /> These components must be located on Exhibit E—Map: <br /> • All major components are shown on Exhibit E—Pre-Mine/Mine Plan Map. <br /> • The operation will consist of an access road allowing borrow material to be <br /> loaded and hauled to the CDOT project construction site. It may also be used <br /> to haul back plant growth material for site reclamation. The existing access <br /> road will be modified as needed to permit safe access off I-25 Frontage Road <br /> to the borrow area. The access road will be reclaimed once mining and site <br /> reclamation operations are completed. <br /> 31 <br />