Corps of Engineers spokeswoman Gina Baltrusch says fires in two cabinets burned themselves out. The fire cause remains under investigation Friday, and there's no estimate of the damage.
Three of the dam's six generators that were operating at the time shut down. One was brought back into operation Thursday night, but the two others are still being evaluated. In addition, one of three generators that were down for maintenance is now operating.
The dam's navigation lock returned to service Thursday afternoon.
Ice Harbor Dam can feed about 300 megawatts into the Bonneville Power Administration grid. That's enough electricity for about 360,000 homes.
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