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Hawthorne Bridge

Hawthorne Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: September 3, 2018

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Key Facts

Facility Carried / Feature Intersected
Hawthorne Avenue Over Willamette River
Location
Portland: Multnomah County, Oregon: United States
Structure Type
Metal 11 Panel Rivet-Connected Parker Through Truss, Movable: Vertical Lift (Span Drive) and Approach Spans: Metal 11 Panel Rivet-Connected Parker Through Truss, Fixed
Construction Date and Builder / Engineer
1910 By Builder/Contractor: Pennsylvania Steel Company of Steelton, Pennsylvania and Engineer/Design: Waddell and Harrington

Technical Facts

Rehabilitation Date
1997
Main Span Length
251 Feet (77 Meters)
Structure Length
1,383 Feet (422 Meters)
Roadway Width
43.6 Feet (13.29 Meters)
Spans
1 Main Span(s) and 5 Approach Span(s)
NBI Number
2757

Historic Significance Rating (HSR)

Bridge Documentation

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

View Historic American Engineering Record (HAER) Documentation For This Bridge

HAER Data Pages, PDF

View National Register of Historic Places Nomination Form For This Bridge

View Historic Bridge Inventory Sheet For This Bridge

HAER Documentation, Willamette River Bridges - Data Pages - Drawings -Timeline

This bridge is a very attractive design of vertical lift bridge, with its fixed through truss approach spans matching the design of the lift span, although some of the approach spans are a couple panels shorter. The lift towers frame neatly onto the top of the adjacent fixed truss spans. The bridge is thus a large and outstanding example of a vertical lift bridge designed by the firm that was famous for lift bridges, Waddell and Harrington. With a 1910 construction date it is also noted as a very early surviving example as well. Portland is noted for bridges with atypical deck layouts on its bridges, including this bridge's use of an additional vehicular lane, cantilevered outside of the truss lines, in addition to the cantilevered sidewalks.

The bridge retains good historic integrity, with no major alterations. One minor alteration is the addition of expansions to the piers, which now accommodate a new steel bracing bracket that extends over the cantilevered decks. These additions appear to provide supplemental stability to the lift towers.

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Photo Galleries and Videos: Hawthorne Bridge

 
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A collection of overview and detail photos. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer

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Maps and Links: Hawthorne Bridge

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