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Mining Plan <br />6.4.4 The Mining Plan for the BURTON PIT is as follows: <br />EXHIBIT "D" <br />(a), (b), (c),(d) and (e) Mining in the pit will continue on an intermittent basis <br />over the next seven (7) to ten (10) years. This site contains the best riprap source in <br />the San Luis Valley. Riprap will be required on several projects that come up in the <br />area such as bridge replacement, erosion control and flood control projects. At the <br />projected demand levels for materials needed in the marketing area there is not enough <br />riprap left on the current permit area to mine. Since the pit needs to be expanded in <br />order to meet the anticipated demand the conversion from a 110c to 112c is required. <br />It is planned to continue mining the rock outcrop in a northeasterly direction. Track <br />drills will be used to drill blast holes to approximate depths of 25 feet. Mining will be <br />done using a series of benches with the depth of each bench not exceeding 25 feet. <br />Shot material will be pushed to the south where it will be processed and stockpiled. <br />Equipment used will include track dozers, rubber -tired loaders, grizzlies and crusher <br />plants. Excavation of the rock outcrop will remain higher than surrounding ground so <br />the natural drainage will be maintained. Shot slopes will be approximately 1/2 H: 1V. <br />Water will only be used in the pit, if necessary, to control dust from the crushing or <br />haul operations. Water will be hauled to the site by water trucks and the water will be <br />purchased from the City of Del Norte. Since this area is an existing pit and in the past <br />topsoil was not removed from plant and stockpile sites it is proposed that unless <br />significant areas can be stripped of topsoil that the soil be left intact. It is felt that <br />removal at this time would result in significant contamination and would be <br />impossible to remove prior to mining operation due to the inaccessibility with <br />equipment of the remaining topsoil. <br />(i) <br />The operation of this mine will not be carried out in phases. The operation of <br />this pit does not lend itself to a phased operation, however I t will be benched <br />as mining occurs which is the phase portion of this mine. Each phase will <br />repeat the steps below. <br />The initial preparation of the surface before extraction of the rock is nil as <br />stated previously due to the nature of the rock outcrop being mined. Any <br />available topsoil (growth medium) will be salvaged and stockpiled for use later <br />during the reclamation process. Front -end loaders, and dozers or any other <br />suitable surface equipment will be used. <br />