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CEMEX, Inc Lyons Mine Permit No. M-1977-208 <br />Bond Calculation <br />Steel <br />The quantity of the steel structures including conveyors, tanks/hoppers, building, <br />fencing, stairs, grating, and utility lines on site has been estimated. These items are <br />included in the cost estimate as Table 2. The line item costs presented in Table 2 <br />include demolition, transportation and disposal to an offsite disposal location. <br />Concrete <br />The concrete demolition and disposal costs estimates are included in Table 3. The <br />calculations for the concrete include all the structures that are above ground surface. <br />Buried foundations, footings, and tunnels were not included in the calculation. However, <br />the building floors and concrete pavement in the plant area were included in the <br />calculation and a uniform thickness of one foot was assumed. The line item costs <br />presented in Table 3 include demolition, transportation and disposal to the onsite <br />disposal area. <br />The demolition costs for the buildings on the site were calculated using values based on <br />the volume of the buildings as they stand (Table 4). It was assumed that the interior <br />floors, columns, foundations, etc., would require additional work, and thus were assigned <br />a separate demolition value based on the volume of concrete. The line item costs <br />presented in Table 3 include demolition, transportation and disposal to the onsite <br />disposal area. <br />Disposal <br />Onsite Disposal <br />The selected disposal site is along a hogback ridge at the south end of the plant site <br />(see site plan map). The disposal site will accommodate approximately 175,000 cubic <br />yards of concrete. The disposal area will require only minor regrading to receive a <br />geosynthetic liner with the appropriate permeability requirements. The disposal site will <br />be capped with three feet of engineered fill, compacted per specifications and <br />revegetated. The borrow source for the fill is located on the Cemex, Inc. Lyons Mine <br />site, two miles or less from the location of the selected disposal site, Additional <br />information on the disposal site including dimensions, the relationship to groundwater <br />and surface water, and material placement techniques will be addressed in the <br />Technical Revision. <br />Offsite Disposal Location <br />The selected disposal site is the RPS Landfill on Highway 93 in Golden. This landfill is <br />located approximately 30 miles south of the Lyons Plant. <br />Unit Cost Sources <br />The Division provided some unit costs. These include the unit cost for demolition and <br />disposal of buildings, conveyors, fencing, and utility lines, as well as the unit cost for a <br />-3- <br />