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temporary earthen stockpile remains more than one growing season, it will be seeded with the <br /> seed mix above to prevent erosion. <br /> Water—General Requirement <br /> To minimize the effect on the prevailing hydrologic balance, Ogilvy River Farm, LLC will: <br /> a. Comply with all applicable Colorado water laws. <br /> b. Comply with all applicable Federal and State water quality laws and regulations. <br /> c. Comply with all Federal and State requirements for dredge and fill. <br /> 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 ditches in necessary areas to <br /> maintain groundwater levels during the mining, and a perimeter drain if needed to convey <br /> groundwater around the lined reservoir after the pit side liner is installed. A ground water model <br /> by McGrane Water Engineering, LLC has also been provided and the results indicate that water <br /> levels will be affected by +1-1 to 3 ft and the wells within the predicted water level change are in <br /> the mounded area so the overall impact of the slurry wall and clay liner will be insignificant and <br /> not noticeable because the depth to groundwater is greater than 30 feet at those well locations. <br /> Ogilvy River Farm, LLC 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 Ogilvy River Farm, LLC to operate responsibly and to mitigate <br /> any damage to wells that is directly attributable to the mining and reclamation of this site. <br /> Reclamation—Approximate Time Table <br /> The initial proposed rate of production for the mine is 300,000 tons per year and the maximum <br /> proposed rate of production for the mine is 1,000,000 tons per year. The total time frame to <br /> mine all phases assuming an average production rate of 650,000 tons per year is approximately <br /> 5 years and 6 months. The following table shows the approximate time frame to finish each <br /> phase of mining assuming an average production rate of 650,000 tons per year: <br /> Acreage Time Frame to Complete and <br /> Reclaim Phase 1a and Phase 1 <br /> 71.91 acres 5 years and 6 months <br /> The assumed annual production rate is 300,000 tons initially to 1,000,000 tons maximum for <br /> processed material leaving the mine each year. The size and area of reclamation varies but <br /> generally consists of the outside mining slope being reclaimed at a 4.5H:1V slope with the <br /> addition of clay, overburden, topsoil, and revegetation. For more information on sequencing and <br /> size of the reclamation activities refer to Exhibit L financial warranty calculations. <br /> ' J&T Consulting,Inc. OgilvygRiRiv Farm,LLC <br /> j <br /> Ogilvy River Farm Pit <br /> DRMS 112 Permit Application <br />