The first night of work goes from 8 p.m. Thursday to 7 a.m. Friday, tweeted the Washington State Department of Transportation (WSDOT). Another three or four overnight lane closures are expected next week.

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One lane of Interstate 5 will close southbound near DuPont on Thursday night, along with the southbound entrance at Mounts Road, for repairs to the train bridge that was damaged in the fatal Amtrak Cascades 501 derailment this week.

The first night of work goes from 8 p.m. Thursday to 7 a.m. Friday, tweeted the Washington State Department of Transportation (WSDOT). Another three or four overnight lane closures are expected next week.

Amtrak train derailment

Sound Transit, which owns the bridge, will also paint over graffiti, said transit spokesman Geoff Patrick. News watchers around the country saw a huge tagger’s mark in footage of wreckage.

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Contractors will be on the bridge Thursday night to begin fabricating and installing metal bridge-support brackets near the west end, Patrick said. Replacement of 25 damaged railroad ties is already underway, he said, while damaged rails and rock ballast must be restored.

WSDOT said Thursday it won’t run Amtrak passenger trains there until positive train control technology is completed next year. But repairs are still needed now, because local freight trains will use that area. Sound Transit will seek compensation from Amtrak, which has already promised in public announcements to pay for all damage.