I-205 Columbia River Bridge: Design and Construction

by Fred P. Blanchard, (M.ASCE), Project Mgr.; Sverdrop & Parcel and Assoc., Inc., St. Louis, Mo. 63101,

Serial Information: Transportation Engineering Journal of ASCE, 1981, Vol. 107, Issue 6, Pg. 625-633

Document Type: Journal Paper


The I-205 Columbia River Bridge is the final link in a forty-mile circumferential highway east of Portland, Oregon and Vancouver, Washington. It is one of the largest single projects using prestressed post-tensioned concrete box girders in the United States today. Concepts for the structure were defined in a type study which compared construction cost, maintenance cost, constructability, and aesthetics of various alternatives. Continuously post-tensioned box girders constructed on falsework and precast segmental box girders (free cantilever erection) are used in the 7,500-ft-long (2286 m) dual structures. Each of the structures is 68 ft (20.7 m) wide. River piers of cofferdam, caisson, segmental precast-concrete shell construction techniques were developed for various applicable locations. Construction, presently underway, is expected to be completed in 1982.

Subject Headings: Bridge design | Infrastructure construction | Box girders | Rivers and streams | Hydraulic design | Highway bridges | Tension | Construction costs | United States | Oregon | Vancouver | British Columbia | Canada | Washington

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