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City staff warn multi-day outage possible to replace worn substation component; temporary-power options costly
Summary
City utilities staff said parts for a worn substation load tap changer have arrived and that replacing it will require a full outage of the substation for up to four days; staff estimated roughly $300,000 for parts and labor, and a mobile substation quote carried a $480,000 minimum cost, prompting discussion of generator alternatives and timing to avoid disrupting schools and critical services.
The city’s utilities staff told councilors that parts for a worn low load tap changer arrived this morning and crews will have to take the substation offline to replace it, causing a potential multi-day outage that could affect large swaths of the city.
Steve, the utilities presenter, said the replacement will require ‘‘an entire blackout on that one substation for upwards of 4 days’’ and that staff’s "conservative estimate is about $300,000 for the low tap changer and the labor to replace it," including contractor work. He told councilors the part…
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