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TO: Mayor Richard C. Irvin
FROM: David E. Schumacher, P.E.; Superintendent of Water Production
DATE: October 14, 2021
SUBJECT:
A resolution authorizing the rehabilitation of river intake pump #5 for the Water Production Division in an amount not to exceed $60,000.00.
PURPOSE:
To obtain City Council authorization for Layne Christensen Company (Layne), 721 W. Illinois Avenue, Aurora, IL, to perform all necessary services as described in Layne's proposal letter (attached) to completely rehabilitate the subject pump and return it to full operational and functional status.
BACKGROUND:
The City of Aurora utilizes the Fox River as a significant source of its potable water supply. Fox River water is conveyed to the City of Aurora Water Treatment Plant by the river intake pump station. The pump station consists of six pumps with capacities ranging from 1,700 to 4,000 gallons per minute.
Periodic repairs and maintenance are required of any type of pumping equipment, but the extended and continuous pumping of river water is especially hard on these pumps. As such, these units experience wear over their many years of operation. Recently, river intake pump #5 exhibited symptoms of mechanical failure, including abnormal vibration and loss of pumping capacity (flow). Layne was requested to perform an on-site inspection with city staff and concurred that further inspection and analysis would be required to determine the actual condition of the pump. The resulting report of Layne's inspection and repair recommendations is attached. River intake pump #5 was last pulled for rehabilitation in 2009.
DISCUSSION:
The total estimated cost of labor and materials for this repair project is $59,145.00. A detailed breakdown of the estimated costs is presented in Layne's proposal letter.
The city entered into a Professional Services Agreement (PSA) with Layne in 2020 under Resolution No. R20-083, which provides a 5% discount on all labor and field services and a 10% di...
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