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Wild Horse Dams and Reservoir West Test Quarry DRMS 111 Application <br /> 4. EXHIBIT D: Reclamation Plan <br /> NOTE: DRMS Guidance from Rule 6:Permit Application Exhibit Requirements is shown in italics for each section. <br /> The Reclamation Plan for the Wild Horse West Test Quarry (Test Quarry) is presented in this Exhibit. DRMS <br /> Guidance from Rule 1: General Provisions and Requirements—Permit Process, Section 6.3.4 Exhibit D Reclamation <br /> Plan is shown in italics for each section. Reference Exhibit E for a map and site plan of reclamation activities. <br /> This Reclamation Plan encourages the orderly development of the state's natural resources while reclaiming the <br /> land so that the affected land may be put to a beneficial use. The plan set forth fosters and encourages the <br /> development of an economically sound and stable water management program with the orderly development of <br /> the state's natural resources. The plan also promotes the diversity of game species by protecting, creating, and <br /> rehabilitating wildlife habitats. <br /> The West Test Quarry is proposed to be reclaimed by the Operator, Flatiron-Dragados-Sukut(FDS)on land owned <br /> by the Hartsel Springs Ranch (HSR), the Owner. <br /> 4.1 Reclamation of the Test Quarry <br /> 6.3.4(1)(a)specify at what point in the mining plan and to what depth(s) overburden will be replaced in relation <br /> to ongoing extraction. <br /> Mining in the Test Quarry area is expected to begin after the required permits are obtained. Mobilization is <br /> expected on or around July 15, 2024. In general, mining of the West Test Quarry will be done starting with the <br /> West Test Quarry Section 1 and ending with the West Test Quarry Section 2. The operation is scheduled to have <br /> completed demobilization from the site by the end of 2024, assuming no unforeseen schedule impacts (or no later <br /> than November 2025). Reclamation of the West Test Quarry sections, and other areas disturbed as part of the <br /> testing program, is expected to take place after all mining operations described in Exhibit C have been completed. <br /> Reclamation of the area is expected to be complete within five years after the end of the mining activities. <br /> 6.3.4(1)(b) specify the maximum gradient of reclaimed slopes (horizontal: vertical). If the Application proposes <br /> slopes steeper than 3:1, the Operator/Applicant must include a justification that supports steeper slopes for the <br /> proposed post-mining land use, and demonstrates compliance with the applicable performance standards of <br /> Rule 3.1. <br /> Test quarry geometry will be adjusted based on final stability calculations. In the steepest scenario. the angle of <br /> each wall face will not exceed 63.5 degrees from the horizontal (0.5H:1 V). Slope stability calculations modeled this <br /> geometry as the steepest-case scenario. It is likely that the Operator will opt for shallower slopes and reduced wall <br /> heights during operations. Benches may be cut into the open cast excavation sides based on continuous field <br /> monitoring of joint networks and kinematically-admissable blocks. The width of each bench will be varied as <br /> required to meet the working method. Each bench length will slope downwards (along the length of the bench) <br /> at an approximate 5% grade. For additional details, reference the Geotechnical Stability Exhibit (Section 13 and <br /> Appendix A). <br /> In general, each test section will be reclaimed by placing typical 2' (+/- 6") of stockpiled overburden followed by <br /> typical 6" (+/- 2") of stockpiled surficial soil. Material will be placed such that the final reclaimed grade within the <br /> test section floors slope at a 2% grade to tie into the existing ground, which is generally located at the south and <br /> east corners of each test section. For the West Test Quarry Test Section 2, if excavation reaches Elevation 9120, <br /> approximately 22.5' (+/-5') of stockpiled nonproduct rock-source material generated from the mining operations <br /> will be placed in 12"-24" lifts and compacted on the test section floor prior to the placement of an equivalent <br /> amount of overburden and surfcial soils. This will allow the West Test Quarry Test Section 2 to be reclaimed in a <br /> similar manner to the other test sections, such that the 2% slope of the overyling surficial soils will naturally drain <br /> Tetra Tech May 2024 19 <br />