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The Marquam Bridge / ˈ m ɑːr k əm / is a double-deck, steel-truss cantilever bridge [1] that carries Interstate 5 traffic across the Willamette River from south of downtown Portland, Oregon, on the west side to the industrial area of inner Southeast on the east. It is the busiest bridge in Oregon, carrying 140,500 vehicles a day as of 2016. [2]
The Oregon state government initially proposed numbering the auxiliary Interstates using lettered suffixes, but were denied in 1958 by the American Association of State Highway Officials (forerunner to the AASHTO). [7] The last section of the Interstate Highway system to be built in Oregon, on I-82 near Hermiston, opened on September 20, 1988. [8]
Willamette River Highway Bridges of Portland, Oregon MPS Burnside Bridge: 1926 2012-11-14 Willamette R. at RM 12.7, Portland: Multnomah: Willamette River Highway Bridges of Portland, Oregon MPS Cape Creek Bridge No. 01113: 1932 2005-08-05
The state of Oregon formally named the new route the Eugene-Mapleton Highway, but did not assign it a route number until 1964, when it became OR 126. [15] Highway authorities agreed to the duplication as a temporary one, as US 126 would soon disappear under the ongoing elimination of three-digit U.S. Routes lying entirely within one state.
Interstate 84 is the longest freeway in Oregon, at over 375 miles (604 km) in length, and is the only Interstate to traverse the state from west to east. [2] The highway connects the Portland metropolitan area to the Columbia River Gorge, the northeastern Columbia Plateau, and part of the Snake River Valley. [3]
Portions of highway officially opened to the public on September 19, 1941. In 1949, the highway was completed. The highway was originally named the Wolf Creek Highway after a nearby creek of the same name. The Oregon State Highway Commission renamed it the Sunset Highway at their January 17, 1946, meeting by a unanimous vote.
The project to replace the Interstate Bridge over the Columbia River on Interstate 5 connecting Washington and Oregon is estimated to cost $6 billion.
Oregon Governor John Kitzhaber introduced a bill for the 2013 legislature (H.B. 2260) which gives the state authority to raise money for the project via tolling; in the bill the project is referred to as "The Interstate 5 Bridge Replacement Program" rather than the CRC, a rebranding noted by local and national journalists. [14] [15] [16]