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<br />Water Supply Reserve Account - Grant Application Form <br /> <br />Form Revised October 2006 <br /> <br />4. Please provide a brief narrative of any related or relevant previous studies. Attach additional <br />sheets as needed. <br /> <br />The preliminary work completed to date by Smith Wiliams, includes a reservoir sizing study and field reconnaissance <br />investigation. Based on this initial work it is anticipated that the dam could be constructed of earth and rock fill <br />material. Most of the material would be obtained from the reservoir basin and other areas to the north and south of <br />the reservoir site. Drainage material would be hauled form from the commercial gravel pits located near the Gunnison <br />River. Riprap for erosion protection at the face of the dam would come from the basalt boulders in the basin and <br />adjacent areas" Initial geologic review of the site indicates that the glacial drift covers much of the area. The glacial <br />drift consists of basalt boulders and cobbles and also includes sands silts and clay soils. The glacial drift should <br />provide, pending future geo-technical investigations, adequate bearing capacity for the dam. <br /> <br />The height of the dam will be dependant on the amount of required storage) which will finalized during future studies. <br />However) the height will be approximately 140 to 180 feet for a 500 and 800 acre-foot reservoir, respectively. The <br />outlet works would be located near the middle of the dam and supply water to the Orchard City water treatment plant <br />No spillway would be constructed but additional surge capacity and diversion ditches around the perimeter of the <br />reservoir would be provided to address the saf~ty of the dam during severe flood events. <br /> <br />5 <br />