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• 00 <br /> orchard Mesa Agg <br /> 11/94 <br /> EXHIBIT "D" <br /> MINING PLAN <br /> The proposed land use is for gravel and overburden extraction. <br /> Exhibit "C-211 , PreMining and Mining Map, illustrates the location <br /> of the primary activities in relation to the surrounding area and <br /> the ultimate slopes which will be representative across the <br /> mining area. The maximum slopes will be at a ratio of 3 <br /> horizontal to 1 vertical. <br /> Based on preliminary investigations it is estimated the site will <br /> yield about 800, 000 cubic yards of material. It is anticipated <br /> that approximately 700, 000 cubic yards of the total will be <br /> gravel. The operation will be limited to weekdays between the <br /> hours of 7 : 00 a.m. and 6: 00 p.m. Operation of the pit will occur <br /> year around. Total life . of the pit is dependent upon the area 's <br /> future gravel and soil needs. It is estimated that the total <br /> mining activity would be approximately 15 years. <br /> The pit does not have any surface water or ground water present <br /> due to the low water table at the mining site. The area is not <br /> prone to flooding from adjoining properties. A holding pond for <br /> -'----. all water run off is located on the SW corner (see Water <br /> Information & Drainage Plan, Exhibit "G") . <br /> Approximately 46. 1 acres of the total 89.7 acre area has been <br /> identified as a gravel source. Prior to actual gravel <br /> extraction, overburden and top soil will be removed and <br /> stockpiled near the extraction area. The topsoil will be <br /> excavated and stockpiled prior to excavation of overburden <br /> material. Each material type will be stockpiled separately. <br /> This will allow access to topsoil during site reclamation. The <br /> topsoil and overburden will be removed by utilizing front end <br /> loaders. Gravel extraction will begin on the ground surface near <br /> the Easterly line of the identified mining area, and proceed <br /> Westerly. Material will be removed to a depth of about 20 feet <br /> from the existing ground surface, utilizing front end loaders. <br /> The excavated material will then be segregated and removed from <br /> the site by truck. A grizzly screen will be utilized to <br /> segregate mined material . Maximum production would be <br /> approximately 5, 000 tons per day. <br /> Exhibit "C-2" indicates the alignment which the haul road will <br /> take tying into the existing gravel pit road, which affords <br /> access to the paved Orchard Mesa Landfill Road, and U. S. Highway <br /> 50, all of which are included in the primary haul route. <br /> Improvements to the haul road will include grading for proper <br /> D-1 <br />