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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 />can be controlled and monitored (with the addition of a stream gage to the proposed project), <br />Disadvantages are considered minor: temporary outages for raw water deliveries, the burden of <br />initial capital cost, disruption of the stream bed during construction, At this stage, section 404 <br />permitting and other approvals are not considered to be a great problem at this site, Construction <br />can take place during the low flow period in the last half of 1996, <br /> <br />In view of the above discussion, alternative 3, reconstruction, is recommended as the most <br />feasible and most cost-effective of the options available, <br /> <br />Impacts and Permitting <br /> <br />For the recommended reconstruction alternative, permitting may consist of a national 404 permit <br />from the V,S, Army Corps of Engineers, Preliminary dialogue has already taken place on this <br />matter, The dam structure would be less than the regulatory ten (10) feet in height, therefore <br />example for regulatory control by the state, Some input from the Colorado Division of Wildlife <br />(fisheries) and the V,S, Fish and Wildlife Service (VSFWS) may be necessary, but this should be <br />minimal since a structure has existed at the site for many years, hnpacts on the narrow floodplain <br />in the canyon due to flood waters would be relatively unchanged, Some review by the Colorado <br />State Division of Highways prior to construction may be required to address construction traffic <br />control and structural safety concerns, No environmental assessment (EA) is anticipated for the <br />proposed alternative, <br /> <br />Conceptual Cost of the Proposed Proiect <br /> <br />A conceptual cost of the recommended reconstruction was developed, The cost is called an order- <br />of-magnitude estimate and is conceptual because it is generated from cost data on similar projects, <br />without benefit of fixed scope or preliminary design, Conceptual cost estimates generally have <br />an expected accuracy of +50% to -30%, The estimate of cost is shown in Table 2.. <br /> <br />Table 2, Conceptual Costs for Diversion and Intake Improvements <br /> <br /> Costs <br />Line Item (1995$) <br />Diversion structure with intake and presedimentation: <br />A, Construction wi 20% contingency 300,000 <br />B, Studies, permits, legal and admin allowance 25,000 <br />C, Engineering design plus construction review 49,000 <br />Total item 374,000 <br /> <br />11 <br />