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City to rebuild high-service pumps at water plant; staff recommends stainless impellers
Summary
After a pump failure, the commission authorized contracting Cogent Companies (Fluid Equipment / Lee Matthews divisions) to rebuild high-service pumps at the water treatment facility, with staff recommending stainless-steel impellers to resist chlorine corrosion; commissioners were told the work should be completed within about six months and that the cost will be paid from maintenance funds.
City public works staff briefed the commission on a failure at the water treatment plant: high-service pump number 4, which supplies pressure from the plant to the main storage tank, failed due to a radial bearing malfunction and excessive wear on the impeller.
Staff recommended rebuilding all four high-service pumps and replacing bronze impellers with stainless steel to prevent future chlorine-related corrosion. The recommendation followed engineering guidance about material life and the city's operational experience.
The commission considered a resolution to enter into an agreement with Cogent Companies (through its Fluid Equipment and Lee Matthews divisions) for materials and services to rebuild the pumps for an amount not to exceed the figure shown in the agenda packet ($62,966.81). The transcript contains an inconsistent alternate figure cited during discussion; staff said funding would come from the city's maintenance/repair fund and estimated a six-month schedule to complete replacements once ordered. Commissioners asked whether the plant would remain operable during the repair period and were told the department would 'make it work.'
A resolution authorizing the agreement was moved, seconded and approved by voice vote. Staff listed follow-up tasks including placing the order with the factory and scheduling the phased rebuilds.
Because the packet and the spoken figure differ slightly in transcription, staff will confirm the final contract amount and post the executed contract in city records.
