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d. Re-grade and backfill all sediment and siltation structures after mining is completed. <br /> e. Monitor groundwater levels adjacent to the site and mitigate any damage to adjacent <br /> wells that dewatering activities may have. (See Exhibit G) <br /> Groundwater—Specific Requirements <br /> The operation will not affect groundwater quality on or off the site. The operation will comply <br /> with State groundwater quality standards. <br /> The mining and reclamation may affect the groundwater table surrounding the mine site. The <br /> proposed mitigation efforts to minimize these impacts are recharge ponds or ditches in <br /> necessary areas to maintain groundwater levels during the mining, and a perimeter drain if <br /> needed to convey groundwater around the lined reservoir after the pit side liner is installed. J-2 <br /> Contracting Company proposes that they monitor groundwater levels through both interior <br /> (within phases of the mining) and exterior (outside the slurry wall lining) monitoring wells that <br /> they have installed, or have access to before, during, and after the mining and reclamation is <br /> complete so that impacts to the groundwater table, from this mining operation, can be identified <br /> and addressed. It is the intent of J-2 Contracting Company to operate responsibly and to <br /> mitigate any damage to wells that is directly attributable to the mining and reclamation of this <br /> site. <br /> Reclamation —Approximate Time Table <br /> The maximum proposed rate of production for the mine is 2,000,000 tons per year. The total <br /> time frame to mine all phases assuming an average production rate of 1,250,000 tons per year <br /> is approximately 23 years and 6 months. The following table shows the approximate time frame <br /> to finish each phase of mining assuming an average production rate of 1,250,000 tons per year: <br /> Mine Phase and Acreage Time Frame to Complete and <br /> Reclaim Phase <br /> Phase 1 — 10.44 acres 1 year <br /> Phase 2— 54.21 acres 6 years and 6 months <br /> Phase 3 — 10.59 acres 1 year <br /> Phase 4 —93.03 acres 12 years and 6 months <br /> Phase 5— 19.39 acres 2 years and 6 months <br /> The assumed annual production rate is 500,000 to 2,000,000 tons for processed material <br /> leaving the mine each year. The size and area of reclamation varies for each phase but <br /> generally consists of the outside mining slope in phases 2, 4, & 5 being reclaimed at a 3H:1 V <br /> slope with the addition of overburden, topsoil, and revegetation. Phases 1 and 3 will be <br /> backfilled with fines from the production process and topsoiled and revegetated once they are <br /> backfilled. For more information on sequencing and size of the reclamation activities refer to <br /> Exhibit L financial warranty calculations. <br /> JaT Consulting, J-2 Contracting Company <br /> R DPG Mining Site <br /> DRMS 112 Permit Application—Technical Revision No. 1 <br />