High Quality Content by WIKIPEDIA articles! The Sellwood Bridge is a truss bridge that spans the Willamette River in Portland, Oregon, in the United States. It was Portland`s first fixed-span bridge and, being the only river crossing for miles in each direction, is the busiest two-lane bridge in Oregon. It links the Sellwood and Westmoreland neighborhoods of Portland on the east side with Oregon Route 43/Macadam Avenue on the west side. At its east end it leads to Tacoma Street. The bridge is owned and operated by Multnomah County.