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Dewatering trenches will be dug in order to lower the pit's water table. Water will be pumped <br />from the ditches through the gravel berm filter to the Colorado River. Trenches will progress <br />both outward and down during the mining area's life to the ultimate limits shown on Map C-2. <br />Once mining has been completed or slightly before mining has been completed in Mining Area <br />1, dewatering will begin on Mining Area 2. Dewatering trenches will be installed similar to <br />Mining Area 1. Throughout the life of Mining Area 2, the dewatering pump will discharge into <br />the oxbow channel's surrounding wetlands. Once mining has neared completion in Mining Area <br />2, Mining Area 1 will be fully reclaimed and thus allowed to fill with water. <br />Once all mining and reclamation have been completed, all pits will be allowed to fill. The Gravel <br />Well Permit and the approved Water Augmentation Plan have been approved for the original <br />permit area as well as the Scott Expansion and are included in Appendix C. The Process and <br />Stormwater Discharge Permit for the site has been submitted, however this plan will need to be <br />modified due to the significant modifications that have occurred. As of March 15, 2010, the Land <br />Use Change permit with Garfield County is approved and in place. <br />0 2. Ground Water <br />Due to the close proximity of the pits to the Colorado River, the ground water table will be very <br />high. It is also believed that a major contribution to the oxbow's water is passing under 1-70. <br />This water is believed to originate from irrigation of fields to the east and south. The expected <br />water table depth lies from 3-8' below the surface. This height will vary depending on the <br />seasons. One well lies within 600' of the expansion. This well is located at the home within the <br />permit area. It will be removed during the mining operation. <br />3. Watershed Permit <br />Due to the pit being near the City of Rifle old water intake, a watershed permit issued by the City <br />of Rifle is required. The latest version of the watershed permit has been submitted to the City and <br />is in process. The jurisdiction of the permit is limited to water quality and protection of their <br />structures. A copy of the permit application is included in Appendix I:. <br />is <br />Scott Pit March 10 G-2