OR 34

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ALSEA HIGHWAY: The Alsea Highway begins in Waldport, Oregon at the intersection of US-101 and runs along the Alsea River to the crest of the coast range and continues into the Willamette Valley. The highway terminates in the city of Philomath, Oregon at the intersection of US-20.

The highway has a small collection of concrete bridges constructed by the Bureau of Public Roads, an unusual steel through girder structure in Tidewater and a small pony truss structure near the town of Alsea.

Alsea River Bridge (Lincoln County, Oregon)
Built 1940
Pony/through plate girder bridge over Alsea River on OR-34
Open to traffic

Arnold Creek Bridge (Lincoln County, Oregon)
Built 1932
Concrete tee beam bridge over Arnold Creek on OR-34
Open to traffic

Harrison Boulevard Bridge (Benton County, Oregon)
Built 1964 as bypass of Van Buren Street Bridge
Haunched deck plate girder bridge over Willamette River on Harrison Boulevard (OR 34 Westbound)
Open to traffic

Lint Creek Bridge (Lincoln County, Oregon)
Built 1931
Stringer bridge over Lint Creek on OR-34
Open to traffic

North Fork Alsea River Bridge (Benton County, Oregon)
Built 1927
Polygonal Warren pony truss bridge over North Fork Alsea River on OR 34
Open to traffic

Southworth Creek Bridge (Lincoln County, Oregon)
Built 1932
Concrete tee beam bridge over Southworth Creek on OR-34
Open to traffic