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The NTSB head also said that if the truck had been on the left lane of the southbound lanes, it likely would have cleared the bridge without a collision, but added that more precise measurements need to be taken. The bridge’s height clearance varies across it.
"We know the company was required to establish that they could clear the entire route," Hersman said.
The truck’s cargo from Canada was headed to Alaska. Its plan was to load the cargo onto a barge in Vancouver, Wash., about 275 miles south of the border crossing. Hersman said she didn’t know why the plan called to use a port a couple of hundred miles away from other ports.
Associated Press writer Donna Gordon Blankinship contributed to this report.
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