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Products <br /> Sand and gravel will be the primary product produced from the Ogilvy River Farm Pit. The <br /> principal intended use for the sand and gravel is for road base and construction aggregates. <br /> Subsurface drilling and testing have verified that the Ogilvy River Farm Pit property contains a <br /> significant commercial deposit of sand and gravel. The depth of interbedded sandy clays at the <br /> surface range from 1 to 11 feet. The thickness of the aggregate material ranges from 46 to 81.5 <br /> feet where bedrock contact occurs. <br /> Mining Methods <br /> The deposit will be dry mined after a slurry wall is constructed around the perimeter of the <br /> mining area. Mining will not expose groundwater prior to the slurry wall being constructed. <br /> Design specifications for the slurry wall and quality control procedures used during construction <br /> will ensure that the reclaimed reservoir meets State Engineer's Office (SEO) performance <br /> standards. Dewatering trenches will be excavated around the perimeter of the mining area prior <br /> to mining operations commencing. The depth of the ditches will vary as the mining progresses <br /> deeper into the alluvium in order to maintain the groundwater level below the bottom of the <br /> active mining surface, and therefore minimize the exposed groundwater surface area. The <br /> dewatering ditches will flow to a collection pond, from which the water will be pumped and <br /> discharged where it will reach the South Platte River. <br /> The equipment and facilities may include, but are not limited to the following: <br /> Scaling Equipment <br /> A scale house and scale will be used to weigh trucks and product leaving the pit. The <br /> dimensions of the scale house are 40' x 12' and the scale will be 70' by 10'. The scale <br /> house will be founded on typical trailer type jacks and tiedowns on top of concrete pads with <br /> minimal rebar to provide reinforcement. The scale will also be founded on concrete pads <br /> with reinforcement where load cells are located for the scale. These foundations would be <br /> removed once the pit is fully mined. <br /> Processing Equipment <br /> Screens, wash plant, crusher, conveyors, stackers, and other miscellaneous processing <br /> equipment. All processing equipment will be mobile and temporary without fixed <br /> foundations. Washing will occur at the wash plant and excess water from the washing will be <br /> recycled to the wash water ponds within the processing area, there will be a sedimentation <br /> pond that will receive the excess water first and then and overflow from the sedimentation <br /> pond to the clear water pond for re-using the water and pumping back to the wash plant. <br /> Earth Moving Equipment <br /> Dozers, loaders, scrapers, excavators, and compactors will be used for mining and earth <br /> moving operations. <br /> Haul Roads and Access Roads <br /> Haul roads will be graded and constructed using the existing pit run where needed outside <br /> the processing area in order to move material from the mine using haul trucks, loaders, or <br /> scrapers. These roads will be mined and removed as the mining is completed. <br /> Access roads to the processing plant will be constructed with aggregates made at the site <br /> where the entrance to the permit boundary is located to the scale house and through the <br /> )♦ Ogilvy River Farm,LLC <br /> V l UT Consulting,Inc. <br /> Ogilvy River Farm Pit <br /> DRMS 112 Permit Application <br />