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Transit Mix Concrete Co. <br /> Maintenance of sediment deposited in the existing ponds is another best management practice. <br /> Sediment levels should be examined annually following the highest runoff season (i.e. summer), <br /> and sediment removal should be undertaken in the fall to prepare the sediment pond for the <br /> next rainy season. This is a critical element of the successful operation of the water management <br /> plan. <br /> For effective use of BMPs, regular inspection and maintenance of the structures must occur. <br /> Specific BMP layouts will be required as part of the detailed drainage design. <br /> e. Water Usage <br /> Water needs for the operation include dust control on the roads and in the crushing and screening <br /> process. Water will be recycled whenever practical. The water usage plan prevents impacts to <br /> downstream water rights holders, and the sediment pond outlet works prevent impacts to water <br /> quality. The primary source of water will likely be via purchase from Colorado Springs Utilities <br /> with water hauled from Colorado Springs and stored on site. The Hitch Rack Ranch owns surface <br /> and ground water rights, and Transit Mix is evaluating the potential for future use of these waters. <br /> Transit Mix may in the future also install groundwater wells on the property to provide a <br /> supplemental water supply. Wells would be installed to prevent impacts to existing nearby water <br /> wells. <br /> No water is needed for irrigation as no irrigation will be used in the revegetation program. The <br /> revegetation program is designed to function and develop under natural precipitation levels. <br /> Some manual augmentation methods may be used for tree plantings. <br /> 5. Groundwater <br /> A summary of groundwater resources and an evaluation of potential impacts resulting from <br /> quarrying prepared by Bishop-Brogden Associates, Inc. is included as Attachment G-2. There <br /> are two groundwater systems in the Hitch Rack Ranch area. The high-angle thrust fault east of <br /> the quarry pit boundaries separates the elevated basement rocks in the west from the lower- <br /> elevation sedimentary units to the west of the Front Range. <br /> Underlying the eastern portion of the Hitch Rack Ranch and separated from the mining area is <br /> the Fountain Formation that begins immediately below the top soil and extends several hundred <br /> feet below ground. An aquifer exists in the sandstone material which provides a limited water <br /> supply. Static water levels appear to be at depths greater than 70 feet, and were reported several <br /> hundred feet deep in several of the wells. <br /> Groundwater in western portion of the Hitch Rack Ranch occurs as near surface waters contained <br /> within the weathered zone and deep groundwater limited to fractures in the basement rock. <br /> There are no groundwater water wells or water monitoring wells within the proposed disturbance <br /> area located in Section 16 of the property. Groundwater was not identified during exploratory <br /> Hitch Rack Ranch Quarry Permit Application M-2016-010 <br /> September 15, 2016 G-21 <br />