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The maximum mining slope is 2.511:1.OV, unless the a variance is requested and approved by the <br />Division in a Technical Revision. Mining Area 2 and then Area 3 will then be mined in order. The Ditch <br />Surge Pond and the Water Holding Pond will be left in place for the mining in these two areas since the <br />Westerman Ditch does not yet have to be moved. After the end of mining in Area 3, mining will then <br />continue from the northern portion of Mining Area 4, working south toward the old Westerman Ditch <br />location. The Westerman Ditch will be permanently diverted in the backfilled portion of Mining Areas 2 <br />and 3, as shown on Map C -2. This ditch does supply users downstream of the permit property and must <br />be maintained. The backfill can easily be controlled to meet the desired ditch grade and ditch <br />dimensions. Map C -2 shows cross sections of how the Ditch will be diverted and then mined. Once the <br />Ditch Company has approved the installation, the water will be cut into the new Ditch location. The old <br />Ditch will be mined out and the land will be reclaimed. As Mining Area 4 is mined out, the water intake <br />from the Westerman Ditch will move to a new location slightly east of the location shown on Map C -2, <br />closer to the house /mine office located in the permit area. <br />It is likely that the sand and gravel operation will last for more than 20 years. Mining of the bank gravel <br />will be conducted by track hoe excavator and a loader will be used to supplement this machine as <br />needed. A road will be made to the excavation area to allow trucks to be loaded with the material to be <br />taken to the gold recovery plant. The natural water level in the permit area will vary with location but is <br />generally found at 50 -75 ft from the surface. No mining activities will uncover ground water. If <br />groundwater is encountered, the area will be immediately backfilled a minimum of 2.0 feet above the <br />groundwater exposure. <br />As mining progresses, backfilling will be done concurrently, which will restore the landscape to its <br />approximate original contour. If gravel sales grow significantly, this will still be offset by swell in the <br />mined material, which is expected to be over 20 %. The cross sections shown on Map C -2 show possible <br />scenarios for full backfill and partial backfill to a new slope. Gravel sales are not expected to be <br />significant since competition is fierce in the area. <br />The permit area is divided into various mining areas and other disturbances, as shown in Table D -1. <br />Sullivan Aggregate Pit March 2015 D -3 <br />