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• • <br />D- l shows the projected phasing in five year increments. Mining is projected to begin on the west <br />end of the West Property Line to Horse Fence and the Renewable Resource Areas. The <br />Renewable Resource Area is in an overflow channel azea. Mining would occur in the overflow <br />channel only in low flow times when there is not any runoff flowing through the area. Barriers <br />l50 feet in width are left on each end to maintain the integrity of the existing main channel of the <br />river. The barrier on the upper end would have large boulders placed along the toe of the slope to <br />prevent erosion of the bank in high flow. <br />Mining would start on the west end of the Renewable Resource Area and proceed up gradient. <br />The estimated depth of mining would be five feet. No mining would occur on the big island that <br />contains the heron nests and an potential avian nests as identified by the Colorado Department of <br />wildlife on aerial photos. The three other potential avian nests in the area are either north of the <br />Colorado River or on an island that is north and east of the permit boundary. Sand and gravel <br />would be extracted with either front end loaders or a hydraulic excavator and hauled from the <br />area in trucks to the nearest in pit crushing and screening facility on interior roads. <br />After the initial mining of the Renewable Resource Area, the frequency of mining will be <br />determined by the ability of the river to fill in the mined area during high flows. Mining in the <br />Renewable Resource Area would end if this area becomes part of the main channel again. If the <br />area becomes part of the channel then the area is considered reclaimed. It is the intent of the <br />operator to mine the Renewable Resource Area until the area becomes part of the main channel or <br />until it is uneconomic to do so. If the Renewable Resource Area becomes uneconomic to mine <br />and it is still an overflow channel then the area will be reclaimed to create a backflow area using <br />materials in the pit area. <br />As mentioned earlier, mining will also occur concurrently with the Renewable Resource Area in <br />the West Property Line to Horse Fence Area. Mining will begin in the west end. A strip will be <br />mined on one side of the azea going east and then return down the other side to the west end. <br />The exact layout of the active pit areas will depend on the location of the in pit crushing and <br />screening facilities. Stockpiles of crushed and screened product will be constructed in the area of <br />the in pit facilities for use in the concrete batch plant or for outside sales. The operator intends on <br />locating these facilities to maximize the mining area covered and to allow cost effective haulage <br />of sand and gravel. The in pit facilities will be moved as needed to optimize the mining operation. <br />Prior to the West Property Line to Horse Fence Area being mined out, as part of the <br />contemporaneous reclamation activity a berm with a top width of 40 feet would be constructed <br />along the west property line to contain the water in the previously mined pit areas. This berm <br />keeps the water from flowing into the next mining area to the west. When the West Property <br />Line to Horse Fence Area is mined out, the pit is expected to fill with water. <br />Mining will proceed from the West Property Line to Horse Fence Area to the west end of the <br />Slough to East Property Line Area. The Slough to East Property Line Area will be mined in a <br />similar manner as the West Property Line to Horse Fence Area from west to east in a strip and <br />then east to west in order to maximize the location of the in pit crushing facilities. The mined out <br />area is expected to fill with water with two lake areas being created. Two lakes are assumed <br />