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The sand and gravel mining area is also shown on Map C -2. The mining of these old piles followed <br />by regrading will greatly improve the appearance of the site. The following operation parameters are <br />forecast: <br />- 12 month per year crushing, screening and washing operation. <br />- active operation will be maximum 6 days per week, 12 hours per day. <br />- move an average of 300 tons (200 cy) per hour through the plants while they are running. <br />- process a maximum of 1800 cy per day of gravel through the plants. <br />- process and sell an average of 130,000 tons per year from the site of all product materials although <br />a maximum allowed will be 290,000 cy per year. <br />- strip an average of 4" of topsoil on virgin areas (although they are virtually non - existent in the <br />gravel mine area) and either directly respread on previously mined and regraded areas or place in a <br />stockpile for use in reclamation. <br />- use a combination of 10 yard and 24 yard trucks to haul the gravel products off site. <br />- use settling ponds in the plant area to trap sediment which will then be stockpiled and used to <br />reclaim pre -law areas where no topsoil was ever salvaged. Fines stockpile locations are shown <br />on Map C -2. <br />- allow for a portable asphalt plant to be located on the site for certain job projects, with town of <br />Alma permission. The plant would only be present for 4 -6 weeks for the job and would then be trans- <br />ported off site. <br />- allow for a portable concrete plant to be located on site to satisfy specific jobs. The plant would <br />never be permanently located on site. The concrete and asphalt plants would be located away from <br />the town in areas that minimize dust, noise, odor and visual impacts. <br />- install a permanent office /shop building that would be converted to commercial use after the <br />gravel pit is reclaimed. <br />- water all roads or use magnesium chloride applications on an as needed basis to keep dust down <br />- obtain water for the plants from Pond A using a pump and 8" water line directly to the previous <br />110 permit area and then to the new mine area. <br />- use a takeoff from the Columbia Ditch as an alternate point to obtain water when needed. See <br />Map C -2 for this location, which has been in use for many years. <br />Alma Placer Mine 1115 30 <br />