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TO: Mayor Richard C. Irvin
FROM: David E. Schumacher, P.E.; Superintendent of Water Production
DATE: November 27, 2017
SUBJECT:
A Resolution Authorizing Well Maintenance Services for Well No. 21 for the Water Production Division.
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 this memorandum to return Well No. 21 to full operational and functional status.
BACKGROUND:
Well No. 21, located at 3000 W. Galena Blvd. is a deep well with the pump and motor setting at 991 feet below the surface and is normally capable of supplying approximately 1,100,000 gallons of water per day. The well's pumping equipment experienced a failure on October 7, 2017. Preliminary testing by Water Production Division (WPD) staff and Layne indicated an apparent electrical failure of the Flowserve-Byron Jackson 2400-volt, 350 horsepower, submersible well pump motor. In order to confirm the exact failure, the well pump/motor assembly must be removed from the well for inspection and further testing.
Subsequently, under a not-to-exceed purchase order of $25,000.00, Layne has recently completed the removal of the pumping equipment and has confirmed a "dead short" of the motor windings, rendering the motor inoperable. A replacement motor, also referred to as a factory exchange motor, is proposed to be provided by Flowserve at a cost of $124,375.00.
DISCUSSION:
The total estimated cost of all proposed and recently completed work by Layne to restore Well No. 21 to operational status is $255,000.00. The estimated cost items that have been identified and will be required based on past experience with deep well pump/motor repairs are identified as follows:
Removal of all pump components and field inspection of motor: $24,700 (completed)
Factory exchange motor: $124,375
Bowl assembly - rebuild: $13,000
Sand bailing: $10,800
Pump reinstallation and testing: ...
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