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o Transit Mix Concrete Co. <br /> occur, at maximum development of the HRR Quarry, at three domestic wells, Permits #173310, <br /> #185992 and #185659, located within a half-mile west of the Ranch property along the south <br /> side of Little Turkey Creek. This minimal drawdown will likely have a negligible impact on the <br /> productivity of these domestic supply wells. One other well location, Permit #34643, is <br /> suspected of being incorrectly recorded with the State Engineer and does not actually exist at <br /> the mapped location. However, in an abundance of caution, it has been included in the impact <br /> evaluation, and the projected drawdown at that location (if a well were located there) is <br /> between 5 and 10 feet. <br /> Transit Mix presented a Substitute Water Supply Plan (SWSP) to the State Engineer. The State <br /> Engineer concluded that there will be no depletions associated with mining at the Quarry, and <br /> therefore there is no need for a SWSP. A detailed discussion regarding the plans and <br /> procedures that will be used by Transit Mix to minimize disturbances to groundwater quality and <br /> quantity is included below. <br /> Finally, with regard to the prevailing hydrologic balance, Transit Mix has down-sized the mine <br /> plans to minimize potential concerns regarding hydrologic impacts. The revised mine plan <br /> moves the Quarry to entirely south of Little Turkey Creek, placing mining operations further <br /> from Deadman Creek and eliminating any projected impacts north of Little Turkey Creek, <br /> including Deadman Creek. <br /> 2. Introduction <br /> This exhibit summarizes the pre-mine water quality and flow conditions in Little Turkey Creek, <br /> the results of the permit-level hydrologic design for the proposed Quarry, and the <br /> groundwater conditions. The project includes a Quarry mining area, an excess fines <br /> stockpile, and an access road. The plant, topsoil stockpiles, and additional excess fines <br /> stockpiles will be located inside the disturbance areas. This exhibit further outlines the plans <br /> and techniques that Transit Mix has carefully created to minimize disturbances to the <br /> hydrologic balance. <br /> This report presents the drainage plan to address the requirements of the Colorado Division <br /> of Reclamation, Mining, and Safety and El Paso County. The more conservative design <br /> criteria were used to ensure that the minimum requirements of both agencies are addressed. <br /> Mitigation measures for sediment and erosion control form the major components of the plan. <br /> The water management plan includes a network of terrace and down drain ditches to divert <br /> runoff from affected areas to sediment basins located in the pit areas. The design of the <br /> ditches and sediment basins ensures that even slight changes to water amounts of flow <br /> patterns are fully mitigated. The plan includes water management structures for all affected <br /> areas at six key phases during the life of the mine: start up, year 5, year 13, year 23, year 40 <br /> (end of mine), and closure. Life-of-Mine structures were designed for each phase using the <br /> Hitch Rack Ranch Quarry Permit Application <br /> March 9, 2018 G-3 <br />