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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />natural drainage at the outlet ditch. <br /> <br />The type of spillway required for this size of dam would be a broad crested weir protected by a concrete <br />cutoff wall and riprap, The wall would be 12,inches in thickness, 4,feet in depth, with a band of riprap <br />along the upstream and downstream contacts with the dam. Some rip rap may be needed in the spillway <br />channel adjacent to the dam to prevent erosion of the dam. <br /> <br />C. COST ANALYSIS <br /> <br />A cost estimate has been prepared for widening the spillway, breaching the dam and replacing the outlet <br />works, installing a toe drain, and raising the saddle dam to the same elevation as the main dam. A cost <br />estimate is also included to line the outlet conduit and replace the control gates as an alternative, Table <br />I below provides an opinion of expected costs for the various alternatives, Tables 2, 3, and 4 provide a <br />detailed cost breakdown for these alternatives, <br /> <br />Please note, these costs were prepared based on design assumptions and without determination of final <br />details. This cost analysis is for planning purposes only and are not expected to be exact costs. The costs <br />include a 30% factor for engineering, legal fees, and contingencies. <br /> <br />ALTERNATIVE <br /> <br />TABLE I <br />COST SUMMARY <br />I <br /> <br />COST ESTIMATE <br /> <br />1. FULL REHABILITATION $231,500 <br />2. SPILLWAY, SADDLEDAM, TOE $ 156,500 <br /> DRAIN, REPAIR OUTLET <br />3. SPILLWAY & SADDLEDAM ONLY $ 71,000 <br /> <br />6 <br /> <br />I <br />