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Wild Horse Dams and Reservoir West Test Quarry DRMS 111 Application <br /> All applicable regulations and permitting from the Colorado Department of Public Health and Environment <br /> (CDPHE) will be followed. Stormwater will be managed in accordance with the CDPHE construction stormwater <br /> guidance(with additional provisions for sand and gravel processing) as well as Best Management Practices(BMPs). <br /> Stormwater resulting from precipitation falling on disturbed areas of the West Test Quarry will be drained via <br /> existing topographic gulches and ditches.Water impoundments consisting of natural ponding areas and detention <br /> basins to store and settle stormwater will be used. The active mine level elevation will be sloped to drain to these <br /> impoundments.As the work progresses, BMPs will be adjusted to handle stormwater.When necessary, stormwater <br /> will be discharged in accordance with the site discharge permit. No detained stormwater will be held for more <br /> than 72 hours. <br /> 3.2.9 Water Laws and Regulations <br /> 6.3.3() specify how you will comply with applicable Colorado water laws and regulations governing injury to <br /> existing water rights. <br /> The Wild Horse Reservoir will use existing water rights of the Applicant's to perform the proposed investigations. <br /> No new water rights are required. <br /> 3.2.10 Toxic Producing Materials <br /> 6.3.3(k) if refuse and acid or toxic producing materials are exposed during mining, describe how they shall be <br /> handled and disposed of in a manner that will control unsightliness and protect the drainage system from <br /> pollution. <br /> No toxic producing materials are expected to be encountered. If toxic producing material is encountered based <br /> on visual identification, water will be treated as necessary prior to discharge and material disposed appropriately. <br /> 3.2.11 Reclamation <br /> 6.3.3(1) describe what measures will be taken to minimize disturbance to the hydrologic balance, prevent off- <br /> site damage, and provide for a stable configuration of the reclaimed area consistent with the proposed future <br /> land use. <br /> For reclamation details, refer to Section 4— Exhibit D. <br /> 3.2.12 On-site Processing <br /> 6.3.3(m) specify whether the deposit will be processed on-site. If the deposit will be processed, then describe the <br /> nature of the process, facilities and chemicals utilized. The process area and any structures must be described <br /> on Exhibit E—Map. <br /> Material will not be processed onsite. Material will be transported to the Common Processing and Materials <br /> Handing Area, which is located outside of the permit boundaries. Processing will be undertaken using mobile or <br /> skid-mounted crushing equipment to produce various aggregate sizes. An excavator or loader will load material <br /> from the stockpile to a Jaw crusher(Jaw) with a feeder. The material will be reduced in size and then conveyed to <br /> a Vertical Shaft Impactor (VSI) crusher to be further reduced in size. Material will also be conveyed to a two- or <br /> three-deck screen (Screen) for material gradation processing. Materials containing significant fines will be sent to <br /> a sand wash plant to remove fine particles. The crushing operation will require water for dust control and sand <br /> washing. <br /> Support equipment will be located within the same footprint, including a 500-kW generator, at least four(4) each <br /> 20,000-gallon Baker tanks, and a lined 1.5 million-gallon construction water pond. Office trailers, washrooms, <br /> testing labs, and parking lots will be constructed within the same footprint to administer the operations. <br /> Tetra Tech May 2024 75 <br />