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Historic Bridges: Clatsop 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: 9

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Astoria-Megler Bridge
HSRNational HSR. Local HSR.
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Oregon Coast Highway (US-101) Over Columbia River in Astoria: Clatsop County, Oregon and Pacific County, Washington, United States
Metal Continuous 28 Panel Rivet-Connected Warren Through Truss, Fixed and Approach Spans: Metal 12 Panel Rivet-Connected Polygonal Warren Through Truss, Fixed
Length: 21,677 ft. Main Span: 1,232 ft. Roadway: 28 ft. Main Spans: 3
Built 1966 By: American Bridge Company of New York, New York and DeLong Corporation and George Stevens, William A. Bugee, and Ivan D. Merchant
This extremely long bridge has simple truss spans at the northern end, and an enormous continuous truss at the southern end.
Blind Slough Railroad Bridge
HSRNational HSR. Local HSR.
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Railroad (Portland and Western Railroad) Over Blind Slough in Rural: Clatsop County, Oregon, United States
Metal Multiple-Type-Connected Pratt Through Truss, Movable: Swing (Center Pier) and Approach Spans: Wood Stringer (Multi-Beam), Fixed
Length: 700 ft. Main Span: 180 ft. Roadway: 12.3 ft. Main Spans: 1
Built 1895 By: Unknown
This is one of a couple noteworthy hand-turned 19th century swing truss bridges in this part of Oregon.
Broadway Street Bridge
HSRNational HSR. Local HSR.
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Broadway Street Over Necanicum River in Seaside: Clatsop County, Oregon, United States
Concrete Closed Spandrel Deck Arch, Fixed
Length: 152 ft. Main Span: 43 ft. Roadway: 30 ft. Main Spans: 3
Built 1924 By: W. A. Webster and J. H. Tillman and G. R. Edwards and Daniel Luten
The only Luten arch in Oregon, this is a classic example of a Luten arch with the balustrade railing used for urban bridges.
Clatskanie River Railroad Bridge
Clatskanie Railroad Bridge
HSRNational HSR. Local HSR.
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Railroad (Portland and Western Railroad) Over Clatskanie River in Clatskanie: Clatsop County, Oregon, United States
Metal Multiple-Type-Connected Pratt Through Truss, Movable: Swing (Center Pier) and Approach Spans: Wood Stringer (Multi-Beam), Fixed
Length: 223 ft. Main Span: 182 ft. Roadway: 12.3 ft. Main Spans: 1
Built 1897 By: Unknown
This is one of a couple noteworthy hand-turned 19th century swing truss bridges in this part of Oregon.
Lewis and Clark River Bridge
HSRNational HSR. Local HSR.
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Business US-101 (Warrenton-Astoria Highway) Over Lewis and Clark River in Astoria: Clatsop County, Oregon, United States
Metal 7 Panel Rivet-Connected Pratt Deck Truss, Movable: Single Leaf Bascule (Fixed Trunnion) and Approach Spans: Wood Stringer (Multi-Beam), Fixed
Length: 870 ft. Main Span: 112 ft. Roadway: 19 ft. Main Spans: 1
Built 1924 By: Unknown and Conde Balcom McCullough (Oregon State Highway Commission)
This is a rare example of a single leaf highway bascule bridge, and it includes a long timber approach causeway.
Neawanna Creek Bridge
HSRNational HSR. Local HSR.
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Oregon Coast Highway (US-101) Over Neawanna Creek in Seaside: Clatsop County, Oregon, United States
Concrete Continuous Curved T-Beam, Fixed
Length: 210 ft. Main Span: 53 ft. Roadway: 27 ft. Main Spans: 4
Built 1930 By: F. L. Odom and Conde Balcom McCullough (Oregon State Highway Commission)
This concrete t-beam bridge is noted for its use of a then-new engineering theory in its design.
!
Necanicum River Bridge
HSRNational HSR. Local HSR.
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Oregon Coast Highway (US-101) Over Necanicum River in Rural: Clatsop County, Oregon, United States
Concrete Curved T-Beam, Fixed
Length: 172 ft. Main Span: 68 ft. Roadway: 27 ft. Main Spans: 3
Built 1930 By: F. L. Odom and Conde Balcom McCullough (Oregon State Highway Commission)
This bridge is an attractive curved t-beam that offers the same details and aesthetics that make larger bridges on this highway eye-catching as well.
New Youngs Bay Bridge
HSRNational HSR. Local HSR.
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Oregon Coast Highway (US-101) Over Youngs Bay in Astoria: Clatsop County, Oregon, United States
Metal 10 Panel Bolt-Connected Warren Pony Truss, Movable: Vertical Lift (Tower Drive) and Approach Spans: Metal 10 Panel Bolt-Connected Warren Pony Truss, Fixed
Length: 4,209 ft. Main Span: 154 ft. Roadway: 30 ft. Main Spans: 1
Built 1964 By: Unknown and Ivan D. Merchant (Oregon State Highway Commission)
This is a late example of a vertical lift bridge.
Youngs Bay Bridge
HSRNational HSR. Local HSR.
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Business US-101 (Warrenton-Astoria Highway) Over Youngs Bay in Astoria: Clatsop County, Oregon, United States
Metal Rivet-Connected Pratt Deck Truss, Movable: Double Leaf Bascule (Fixed Trunnion) and Approach Spans: Wood Stringer (Multi-Beam), Fixed
Length: 1,845 ft. Main Span: 166 ft. Roadway: 20.3 ft. Main Spans: 1
Built 1921 By: Gilpin Construction Company of Portland, Oregon and Conde Balcom McCullough (Oregon State Highway Commission)
This is a graceful double-leaf bascule bridge, and is also noted for its unusual ornate combination of concrete and timber approach railings.

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