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EXHIBIT C Mining Plan Mining in the pit will continue on an intermittent basis over the next ten years. This site contains the best riprap source in the San Luis Valley. Riprap will probably be required on several bridge replacement projects planned by the Department of Highways scheduled in their Five Year Plan. It is also possible that several of the counties and cities in the area may have bridge replacement projects or flood control projects under construction in the coming years. At recent demand levels there appears to be enough material in the pit to assure operation for at least ten years. It is planned to continue mining the rock outcrop in a northeasterly direction. Track drills will be used to drill blast holes to approximate depths of 25 feet. Mining will be done using a series of benches with the depth of each bench not exceeding 25 feet. shot material will be pushed to the south where it will be processed and stockpiled. Equipment used will include track dozers, rubber-tired loaders, grizzlies and crusher plants. Excavation of the rock outcrop will remain higher than surrounding ground so the natural drainage will be maintained. Shot slopes will be approximately }:1 to }:1. Water will only be used in the pit, if necessary, to control dust from crushing or haul operations. Water will be hauled to the site by water truck and will be purchased from the City of Del Norte. Since this area is an existing pit and in the past topsoil was not removed from plant and stockpile sites it is proposed that unless signifcant areas can be stripped of topsoil that the soil be left intact. It is felt that removal at this time would result in significant contamination and would create a mess at the site. Any significant topsoil on the rock outcrop would be impossible to remove prior to mining operation due to the inaccesibility with equipment of the remaining topsoil.