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Marquam Bridge

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Identification

Marquam Bridge
Interstate 5 Bridge or Erector Set Bridge
239427

Map

Structure in General

bridge
existing [completed]
gray

Usages

vehicle traffic

Facts

  • The vertically stacked bridge, carries traffic on two decks, which are supported by trusses.
  • The bridge has not been designed to carry pedestrian or bicycle traffic.
  • The Marquam Bridge was named after Philip A. Marquam.
  • The grand opening of the lower desk was held on October 4, 1966; and October 18, 1966 for the upper deck.
  • In 1987, the bridge was listed as the third-longest continuous truss bridge in North America.
  • The Marquam is the first double-deck vehicle-only bridge built in Oregon.
  • The length of each side span is 301'-6" long.
  • The lower deck at its highest point is located approximately 120 feet above the Willamette River. The height might fluctuate depending on the river water levels.
  • The length of the main span is 440 feet, whereas, the total truss span length is 1043 feet.

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More Information

Location

Marquam Bridge
97201
Corbett/Terwilliger
Downtown
Portland
Oregon
U.S.A.

Technical Data

165.00 ft
1,043.01 ft
57.00 ft
1966
1995
$14,000,000

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