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,~ i . In addition to evaluating alternates to ensure a continuous supply of raw water, a major premise of the Planning Document was to upgrade the existing water treatment plant capacity to be able to meet the demands of the ~ulilinate devel- opment of the earlier mentioned 350 EQR established by the Augmentation Plan. The selected alternate will therefore also include~an upgrade of the exist- ing treatment capacity to serve such ultimate develpment. At their meeting on July 23, 2003,th~ District Board unaq.imously chose what is termed in the Planning Document as the" Crow lane # 1,35' high dam" al- ) ternate as the preferred plan. 'This will include a raw water reservoir, a raw wa- ,,~\ r ter fill and draw transmission system between the the River and the reservoir, ~\ ~ and the above mentioned upgrade in water treatment capacity. Also included will be a re-routing of a segment of the existing treated water distribution sys- '\. tern to get it out from under the site of the proposed reservoir, as well as a rehabilitation of that segment of the existing treated water distribution system. which parallels the proposed route of the above mentioned fill and draw sys- tem. . All of the designs developed for the alternates evaluated in the Planning Docu- ment are of a preliminary conceptual nature for comparison purposes, and are subject to refmement during more specific design efforts. It is the purpose of this Preliminary Engineering Report to describe the Dis- f " vV I II . trict's present situation, analyse the alternatives and the basis for choosing the o~ (L. "Crow Lane # 1,35 ' high dam alternate, and propose.the action to be taken to ,iA accomplish its construction. The format used will be an engineering commen- . tary by Frank L. Novak, P.E., an employee of the District, referring to the Plan- ning Document prepared by McLaughlin Water Engineers, and consistent with the outline presented in RUS Bulletin 17~O-2.