Agenda - 09-16-1986 - Laserfiche WebLink

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o the need for additional water supply. The Little River dam and to add 'a new gated concrete overflow spillway. Th was recommended as the most appropriate long-term solution storage volume in the reservoir was increased from 800 t after careful consideration of all relevant factors 2200 million gallons . A 45 mgd pumping station equippe Influencing its suitability as a public water supply. with diesel engine driven pumps, stand-by generator, an chlorination facilities was constructed adjacent to th The project consists o€ an ea r.th dam approximately g5-ft. spillway and embedded in the earth dam. high containing roughly 500,000 cubic yards of earth fill, a gated concrete service spillway, a multi-level raw water Townsend Dam and Reservoir intake, 24 mgd raw water pumping station and 10,000 feet of 54-inch raw water transmission main. Portions of six Construction of the 6500 million gallon Townsend Dam anc secondary roads and federal highways will be abandoned or Reservoir was completed in 1969 and represents €ul ] relocated. When completed, the dam will form a 530 acre development of the Reedy Fork Creek supply. The dam is 4( reservoir impounding 4600 million gallons with an estimated feet high and contains roughly 190,000 cubic yards of earth safe yeild of 21 mgd. fill . Other facilities include a gated concrete overfloG spillway, a 36-inch diameter transmission main and 40 mgc Final design of the Little River Dam began in late 1982, low-lift pumping station containing three vertical pumps for Design work for the' raw water transmission main and the road delivering water to the Townsend water Filtration Plant. relocations have been completed and construction will begin Construction of the reservoir required reconstruction of during the summer of 1983. Final design of the dam and portions of two main roads and several secondary roads and pumping station will be completed in late 1963 with clearing of approximately 1500 acres of land. construction scheduled to begin in the Spring of 1984. Department of Public Works, City of Greensboro, N.C. Hagen and Sawyer has served as consultant to the City of Purpose and Approach to Reservoir Feasibility Study Greensboro on the development and design of the City's water The purpose of the Reservoir Feasibility Report will be to supply system for the past 25 years, During that period, identify and evaluate potential reservoir development sites in the firm has evaluated numerous projects and reservoir. sites the Upper Eno River Basin. In addition to the site previously to provide an orderly development of capacity necessary to identified on Seven Mile Creek, the study should consider other meet actual and anticipated water demands . The present potential sites further upstream in the Eno Basin which would not Greensboro system, with a combined safe yield of 46 mgd, is be subject to the influence of Interstate 85 or desired obtained from three reservoirs, designed by Hazen and industrial development in Cheeks Township. Reservoir sites Sawyer , in the Reedy Fork Creek .Basin, a tributary of the investigated must be capable of providing raw water of good Haw River. quality and sufficient quantity to meet the long-term water needs of Northern Orange County. We recognize that one of the Lake Higgins Dam objectives of this study is to determine the feasibility of reservoir sites upstream of Seven Mile Creek or the McGowan Creek Construction of Lake Higgins Dam was completed in 1956. The Basin which would permit industrial or other development in the dam was constructed over an existing earth dam and is Seven Mile Creek and McGowan Creek drainage areas. The outcome approximately 35 feet high containing 150,000 cubic yards of of the reservoir feasibility study will determine the extent of earth fill. The reservoir created has a surface area of 230 the feasibility study to evaluate.water and sewer extensions in acres and contains 800 million gallons of raw water storage. the Seven Mile Creek and MaGogan Creek basins adjacent to Raw water from Lake Biggins is released downstream to Lake Interstate 05. 1 Brandt for pumping to the Mitchell Water Treatment Plant. Hazen and Sawyer will complete the reservoir feasibility Lake Brandt Dam and Pumping Station study in a manner acceptable to the County and in general accordance with the outline in the Request for Proposals. In The original Lake Brand t Dam was constructed in 1923. In order to minimize the initial engineering cost, we will utilize 1960, Hazen and Sawyer designed and supervised construction existing information to the maximum extent possible. Utilizing of a project to raise the height of the existing earth dam the outline contained in the Request for Proposals, Hazen and II-3 =-- -` II-4