Historic Bridges: Marion County, Oregon

Special Bridge Conditions Legend: R - Former location of relocated bridge. ! - At risk for demolition or destruction. X - Confirmed demolished or collapsed. S - Dismantled and/or in storage. L - Severe loss of historic integrity due to alteration.

Total Bridges Found: 7

Jacob Conser Bridge
HSR

OR-164 (OR-99E Business) Over Santiam River in Jefferson: Marion County, Oregon and Linn County, Oregon, United States

Concrete Rainbow Through Arch, Fixed and Approach Spans: Concrete Curved T-Beam, Fixed

Length: 802 ft. Main Span: 200 ft. Roadway: 24 ft. Main Spans: 3

Built 1933 By: Clackamas Construction Company of Clackamas, Oregon and Conde Balcom McCullough (Oregon State Highway Commission)

This is an impressive multi-span example of a rainbow arch bridge.

Jefferson Railroad Bridge
HSR

Railroad (Union Pacific) Over Santiam River in Jefferson: Marion County, Oregon and Linn County, Oregon, United States

Metal 7 Panel Pin-Connected Camelback Through Truss, Fixed and Approach Spans: Metal Stringer (Multi-Beam), Fixed

Length: 1,553 ft. Main Span: 190 ft. Main Spans: 2

Built 1906 By: American Bridge Company of New York, New York

This multi-span railroad truss bridge appears to be slowly losing its original spans to replacement.

Marion Street Bridge
HSR

Marion Street Over Willamette River in Salem: Marion County, Oregon and Polk County, Oregon, United States

Metal Rivet-Connected Deck Girder, Fixed (Span Drive) and Approach Spans: Concrete T-Beam, Fixed

Length: 2,393 ft. Main Span: 252 ft. Roadway: 56 ft. Main Spans: 4

Built 1953 By: Unknown and Glenn S. Paxson (Oregon State Highway Commission)

This riveted deck plate girder bridge was widened on one side with modern girders.

Mill City Bridge
HSR

1st Avenue (OR-22 Connector) Over Santiam River in Mill City: Linn County, Oregon and Marion County, Oregon, United States

Metal 10 Panel Rivet-Connected Parker Through Truss, Fixed and Approach Spans: Concrete T-Beam, Fixed

Length: 362 ft. Main Span: 200 ft. Roadway: 23.3 ft. Main Spans: 1

Built 1934 By: Unknown

This is an unaltered and outstanding representative example of a 1930s standard riveted through truss bridge in Oregon.

Mill City Railroad Bridge
HSR

Railroad (Mill City Trail Rail-Trail) Over Santiam River in Mill City: Linn County, Oregon and Marion County, Oregon, United States

Metal 6 Panel Pin-Connected Pratt Through Truss, Fixed and Approach Spans: Wood Stringer (Multi-Beam), Fixed

Length: 285 ft. Main Span: 120 ft. Roadway: 15 ft. Main Spans: 1

Built 1888 By: Phoenix Bridge Company of Phoenixville, Pennsylvania

Moved here in 1919 from near San Jose, California, this is one of only two rare and highly significant Phoenix truss bridges in Oregon.

Newberg Bridge
Champoeg Road Bridge
HSR

Pipeline (Formerly Champoeg Road) Over Willamette River in Newberg: Yamhill County, Oregon and Marion County, Oregon, United States

Metal Rivet-Connected Modified Warren (Subdivided) Deck Truss, Fixed

Length: 735 ft. Main Span: 315 ft. Roadway: 20 ft. Main Spans: 3

Built 1914 By: Coast Bridge Company of Portland, Oregon

A former highway bridge that only carries a pipeline today, this is a very unusual design of cantilever truss bridge.

Union Street Railroad Bridge
HSR

Railroad (Rail-Trail, Former Union Pacific Railroad) Over Willamette River in Salem: Marion County, Oregon and Polk County, Oregon, United States

Metal 5 Panel Rivet-Connected Pratt Through Truss, Movable: Vertical Lift (Span Drive) and Approach Spans: Metal 7 Panel Rivet-Connected Pratt Through Truss, Fixed

Length: 1,572 ft. Main Span: 134 ft. Main Spans: 1

Built 1913 By: American Bridge Company of New York, New York and Waddell and Harrington of Kansas City, Missouri

This impressive vertical lift railroad bridge has been beautifully preserved and converted for pedestrian use, and is a popular crossing now.

Historic Bridges: Marion County, Oregon

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