Portland General Electric has announced the 585 MW Boardman coal-fired plant is back online, according to a report from Reuters. The power plant, which is located in Oregon, was shut down July 1 for unplanned repairs.
According to the report, Boardman had a thermal hammer event in the cold reheat line that caused structural damage.
The company also said its 740 MW Colstrip 4 coal-fired unit in Montana, which also shut July 1, could remain offline the rest of the year, Reuters stated. The unit experienced vibration and rotor issues.
According to Reuters, repair costs for Boardman are expected to be around $10 million, while repairs to Colstrip Unit 4 are expected to cost between $30 million and $40 million. PGE estimates 2013 replacement power costs for the two plants combined to be between $10 million and $12 million.
PGE owns 65 percent of Boardman and 20 percent of Colstrip Unit 4.
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