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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 />I <br /> <br />Chapter VI: ESTIMATED COSTS <br /> <br />A. Costs..of Construction. A cost analysis was conducted for <br />three dam alternatives and two spillway location alternatives. <br />The quantities determined are in general based on surveyed site <br />cross sections taken at 100 foot intervals along the dam and <br />spillway. The unit costs applied to each item are based on a <br />weighted average of the costs bid on Clark Lake in July of 1988 <br />and based on costs being currently bid on similar type construc- <br />tion in Northern Colorado. <br /> <br />The following summaries show the overall costs for the <br />alternatives being considered and Tables VI-l through VI-3 shows a <br />complete breakdown of estimated quantities and costs. <br /> <br />Alternative No.1 - Repair existing dam to Crest Elevation G.H. <br />29.0' at 3:1 side slopes. <br /> <br />Table Reference <br /> <br />Base Cost <br />wlo <br />Spillway <br /> <br />Total Cost <br />wi West <br />Spillway <br /> <br />Total Cost <br />wi East <br />Spillway <br /> <br />VI - 1 <br /> <br />$375,548 <br /> <br />$546,998 <br /> <br />$460,223 <br /> <br />Alternative No.2 Repair existing dam to Crest Elevation G.H. <br />29.0' with 4:1 upstream slope and 3:1 downstream slope. <br /> <br />Table Reference <br /> <br />Base Cost <br />wlo Spillway <br /> <br />Total Cost <br />wi West <br />Spillway <br /> <br />Total Cost <br />wi East <br />Spillway <br /> <br />VI - 2 <br /> <br />$428,023 <br /> <br />$599,473 <br /> <br />Alternative <br />maximum pool <br />eam slopes. <br /> <br />$512,698 <br /> <br />No.3 Raise dan Crest Elevation to G.H 34.0', <br />at G.H. 29.0', 4:1 upstream slopes, and 3:1 downstr- <br /> <br />Table Reference <br /> <br />Base Cost <br />wlo Spillway <br /> <br />Total Cost <br />wi West <br />Spillway <br /> <br />Total Cost <br />wi East <br />Spillway <br /> <br />VI - 3 <br /> <br />$598,444 <br /> <br />VI-l <br /> <br />$742,019 <br /> <br />$777,894 <br />