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The Interstate Bridge's name is a simple descriptive one based on its location, as a bridge connecting two states. [2] In 1917, the new bridge gave its name to a Portland arterial street. Shortly before the bridge opened, a pair of streets through North Portland that were planned to be treated as the main route to and from the bridge, Maryland ...
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]
In Portland, the route overlaps I-405 (Stadium Freeway No. 61) for a short distance before exiting onto city streets, including Arthur Street, to reach the Ross Island Bridge. US 26 leaves the bridge, which is at the beginning of the Mount Hood Highway No. 26, and follows Powell Boulevard, a surface street, to Gresham.
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.
The Glenn L. Jackson Memorial Bridge, or I-205 Bridge, is a segmental bridge that spans the Columbia River between Portland, Oregon and Vancouver, Washington. It carries Interstate 205, a freeway bypass of Portland, Oregon. The structure is maintained by the Oregon Department of Transportation.
The project to replace the Interstate Bridge over the Columbia River on Interstate 5 connecting Washington and Oregon is estimated to cost $6 billion.
It is also known as the Oregon City Freeway Bridge and the I-205 Bridge. The bridge was dedicated and opened on May 28, 1970, and cost $17.1 million to construct. [ 2 ] It is named for George Abernethy , who was the governor of the Provisional Government of the Oregon Country from 1845 to 1849 and later an Oregon City businessman. [ 1 ]