C2AE was hired to provide engineering services for the construction of a new raw water intake into Bay de Noc in the Upper Peninsula. The new intake was to serve in parallel with the original late 1800ís intake to increase reliability of the water supply to the municipal treatment facility.
The project started with a feasibility study to evaluate alternatives and identify project scope. The recommended solution was to construct a conventional open intake and to bury intake piping below the lake bottom for protection in this recreational boating and commercial shipping corridor. A comprehensive raw water and lake bottom sediment sampling program was completed to determine the final intake location.
The selection process considered current raw water quality, potential future contamination, and environmental risks associated with suspension of lake sediments. The accelerated design was completed on schedule in 75 days to allow the City to take advantage of a funding opportunity. The end project also included repairs and painting for the Cityís 500,000 gallon South Elevated Tank.
The intake includes 700 ft. of 30-inch ductile iron pipe (DIP) installed below lake level, 1,000 feet of conventional open cut land installation, a new timber intake crib, and small diameter tubing for sampling and mussel control at the submerged intake. The new intake crib was designed to be located at a depth of 65 ft. Intake trash screens were designed with low approach velocities to limit fish capture and were constructed of copper to resist mussel fowling.
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