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<br />. <br /> <br />" /" C ('I <br />oJ,>",,", <br /> <br />The Mt. Elbert Forebay will be lined with a layer of impervious <br /> <br />silt clay. Lenses of permeable materials exist at the forebay <br /> <br />site. These pervious materials will be mixed with clays from <br /> <br />other parts of the forebay floor. This will be deposited in <br /> <br />an approximate five foot thick water tight layer over the fore- <br /> <br />bay floor. <br /> <br />Inasmuch as the drainage area for the reservoir is very small, <br /> <br />there will be no spillway for the forebay dam. The estimated <br /> <br />inflow flood, resulting from i1 severe thunderstorm and having <br /> <br />a 70 minute volume of 350 acre-feet, will be stored as sur- <br /> <br />charge. An outlet works, other than the penstock inlet-outlet <br /> <br />. <br /> <br />structure is not required. <br /> <br />3. <br /> <br />Land Acquisition <br />Approximately 8,000 acres of Federal, State, and private land <br /> <br />lie within the proposed boundary for the development of Twin <br /> <br />Lakes and the Mt. Elbert Pumped-Storage Powerplant complex. <br /> <br />Of the 8,000 acres of land to be acquired, approximately 4,000 <br /> <br />acres will be obtained for the develcpment of recreation facili... <br /> <br />ties. Related Project developments to be located within the <br /> <br />Twin Lakes Reservoir boundary, besides Twin Lakes Dam, Twin <br /> <br />Lakes, and Mt. Elbert Forebay include: Mt. Elbert Pumped- <br /> <br />Storage Powerplant, Mt. Elbert Switchyard, State Highway No. <br /> <br />. <br /> <br />A-13 <br /> <br />