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Prior to dewatering mining stages 2-5, a soil-bentonite slurry wall will be installed <br />• around the perimeter of each mining stage. Once the slurry wall in place the stage to be <br />mined will be de-watered and mined. With the slurry wall in place prior to pit de- <br />watering, adverse impacts to nearby groundwater wells will be avoided. <br />Topsoil and overburden will be placed in temporary stockpiles within the mining <br />area limits. Topsoil and overburden will be salvaged and stockpiled separately. <br />Approximate topsoil and overburden stockpile areas are shown on the Mine Plan Map. <br />The deposit will be mined using scrapers and front-end loaders. Excavated sand and <br />gravel will be discharged to a field conveyor system for transport to the on-site <br />processing plant located in the north half of Morton Stage 3. Additional conveyors may <br />be used inside the mine areas to facilitate transport of the resource. <br />All Holton Lakes sand and gravel will be transported by conveyor to the sand and <br />gravel processing plant on the Morton Lakes property. <br />Primary access to and from the Morton Lakes operation will be via an access road <br />from Holton Lakes to Colorado State Highway 52. Haul trucks to and from the site will <br />use Highway 52, only. The Highway 52 access road intersection with will be upgraded <br />per C-DOT Permit No. 407153. <br />5.3 Mining Schedule <br />Mining is currently projected at a rate of 1 to 2 million tons/year, depending on the <br />economy. Based on an estimated reserve of 7.7 million tons and a mining rate of Imillion <br />tons per year the Morton sand and gravel reserves will last approximately 8 years. Pre- <br />Mining activities are currently projected to commence in 2009 with mining scheduled to <br />begin in 2010. <br />5.4 Surface Water Management <br />All mine areas will drain internally. Uncontrolled releases of surface water and <br />sediment from mining areas will not occur. Storm water collected in the open pit will be <br />managed in accordance with Colorado/NPDES discharge permit requirements. Sediment <br />generated from localized storm water runoff and surface drainage will be detained in the <br />• ponds created by the proposed mining operation. <br />2