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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 V - Evaluation of Alternatives <br /> <br />A.3 Social Structure Impacts <br /> <br />There will not be any foreseen impacts on existing neighborhoods and communities or on <br />employment. The project will not increase the maximum high water level in the reservoir. The <br />project will allow the social structure in the area to remain intact by creating a safe environment <br />surrounding the reservoir. Recreational uses for the reservoir will not be disturbed during the <br />construction of the low-level outlet works. <br /> <br />B. Institutional Considerations <br /> <br />The SED will require the project design be reviewed and accepted prior to construction. A <br />list of permits, which may be required, can be found in the Institutional Considerations section of <br />Chapter VI. <br /> <br />C. Comparative Evaluation <br /> <br />The alternatives were evaluated based on costs, technical merit, and preference of the <br />Company since the above described evaluation factors are common to all alternatives considered for <br />the project. <br /> <br />A feasibility level proqable cost estimate was developed for each of the altemati ves. Major <br />construction work items were identified and unit prices and quantities were estimated. The <br />following assumptions were made: <br /> <br />· The water level in Boyd Lake at the time of construction will be below the existing low-level <br />outlet invert elevation. If the level is higher, the costs will increase due to the need to construct <br />cofferdams and provide for temporary water diversion. <br /> <br />· The existing low-level outlet works is founded on competent bedrock material, and therefore the <br />foundations for any new structures can be located at similar elevations. If it is found that <br />competent bedrock is deeper, additional measures will be required to ensure the new structures <br />are stable. <br /> <br />· The cost item "Mobilization/Demobilization" is identified to cover the costs of mobilization and <br />demobilization of equipment, temporary construction facilities, and bonds and insurance. For <br /> <br />Boyd Lake Dam Outlet System Feasibility Study <br /> <br />19 <br /> <br />1f30VLE <br />