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TO: Mayor Thomas J. Weisner
FROM: David E. Schumacher, P.E.; Superintendent of Water Production
DATE: October 21, 2016
SUBJECT:
Resolution to authorize a Professional Services Agreement for design, bidding, and construction assistance services for the Master Meter Replacement project for the Water Production Division.
PURPOSE:
To obtain City Council approval to attain a professional engineering services agreement with Black & Veatch, Chicago, IL (B&V) for design, bidding, and construction assistance services for the Master Meter Replacement project for the Water Production Division.
BACKGROUND:
All residents of the City of Aurora are provided with potable water from the city owned and operated Water Treatment Plant (WTP). The WTP was originally constructed in 1991/1992 and began operation in 1992. The water treated at the facility is then pumped to two distinct and separate pressure zones, the normal and high zones, which cover the entire City of Aurora.
All of the water that is pumped out to each pressure zone flows through two separate "master" flow meters which register the amount of flow pumped to each pressure zone. This information is then used for multiple purposes such as reporting to regulatory authorities, monitoring quantities of water loss, and insuring proper operation of the WTP's finished water pumps.
These two master meters have been in constant operation since 1992, and over the past several years they have shown decreased measurement accuracy and precision. Accordingly, the WPD has hired several experts from the flow meter manufacturing company to inspect both meters and perform various types of repairs. Unfortunately, the electrical windings in the normal pressure system master flow meter are no longer salvageable and the accuracy and precision of the meter is severely hampered. After 24 years of constant operation, the WPD believes that both master meters are at the end of their useful lives and it is now time to replace th...
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