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a 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 side <br /> 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 suspected <br /> of being incorrectly recorded with the State Engineer and does not actually exist at the mapped <br /> location. However, in an abundance of caution, it has been included in the impact evaluation, <br /> and the projected drawdown at that location is between 5 and 10 feet. <br /> Transit Mix is in the process of securing the necessary groundwater permits and Substitute Water <br /> Supply Plan (SWSP) from the State Engineer. The SWSP demonstrated that since there will be <br /> no depletions associated with mining at the Quarry, there is no need for a SWSP. A detailed <br /> discussion regarding the plans and procedures that will be used by Transit Mix to minimize <br /> disturbances to groundwater quality and 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 moves <br /> the Quarry to entirely south of Little Turkey Creek, placing mining operations further from <br /> Deadman Creek and eliminating any projected impacts north of Little Turkey Creek, including <br /> 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 groundwater <br /> conditions. The project includes a Quarry mining area, an excess fines stockpile, and an <br /> access road. The plant, topsoil stockpiles, and additional excess fines stockpiles will be located <br /> inside the disturbance areas. This exhibit further outlines the plans and techniques that Transit <br /> Mix has carefully created to minimize disturbances to the hydrologic balance. <br /> This report presents the drainage plan to address the requirements of the Colorado Division of <br /> Reclamation, Mining, and Safety and El Paso County. The more conservative design criteria <br /> 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 ditches <br /> and sediment basins ensures that even slight changes to water amounts of flow patterns are <br /> fully mitigated. The plan includes water management structures for all affected areas at six key <br /> phases during the life of the mine: start up, year 5, year 13, year 23, year 40 (end of mine), <br /> and closure. Life-of-Mine structures were designed for each phase using the ultimate extents <br /> of the disturbance, and the most conservative values reported in this document so that the <br /> Hitch Rack Ranch Quarry Permit Application <br /> October 3,2017 G-3 <br />