Half Viaduct
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Crown Point Viaduct (Multnomah County, Oregon)
Built 1914Bridge over Crown Point on Historical Columbia River HighwayOpen to traffic
Eagle Creek Viaduct (Multnomah County, Oregon)
Built 1915, Closed 1937, Re-opened as trail 1995Concrete deck girder bridge over Tooth Rock slopes on Historical Columbia River HighwayOpen to pedestrians
Mitchell Point Viaduct (Hood River County, Oregon)
Built in 1915; bypassed 1954; demolished 1966Lost Concrete tee beam bridge on US 30Demolished
Prescott Point Viaduct (Columbia County, Oregon)
Built 1918Abandoned concrete tee beam bridge on Former US 30Derelict/abandoned
Rock Side Viaduct (Hood River County, Oregon)
Built 1921Concrete tee beam bridge on Fromer US 30Open to pedestrians only
Ruthon Point Viaduct (Hood River County, Oregon)
Built 1918Concrete tee beam bridge on Formerly US 30Intact but closed to all traffic
Tooth Rock Viaduct (Multnomah County, Oregon)
Built 1915, Closed 1937, Re-opened as trail 1995Concrete deck girder bridge over Tooth Rock slopes on Historical Columbia River HighwayOpen to pedestrians
West Multnomah Falls Viaduct (Multnomah County, Oregon)
Built 1914Bridge over rocky terrain along railroad tracks on Historic Columbia River HighwayOpen to traffic