The vote Monday was 18-11. Gov. John Kitzhaber, a bridge backer, says he'll sign the bill.
The money will be spent only if Washington state comes up with its $450 million share, the federal government agrees to contribute more than $1 billion and the U.S. Coast Guard issues building permits.
The total cost is estimated at $3.4 billion.
The project would include a new bridge for vehicles, pedestrians, bicyclists and light-rail trains, along with new interchanges on both sides of the river.
Supporters say the project will boost commerce. Opponents have reservations about the project's funding.
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