Glenn L. Jackson Memorial Bridge

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The Glenn L. Jackson Memorial Bridge, or I-205 bridge, is a segmental bridge that spans the Columbia River between Vancouver, Washington and Portland, Oregon.

Glenn Jackson Memorial Bridge
Glenn Jackson Bridge aerial.jpg
Aerial view, looking north
Coordinates45°35′35″N 122°32′55″W / 45.59306°N 122.54861°W / 45.59306; -122.54861Coordinates: 45°35′35″N 122°32′55″W / 45.59306°N 122.54861°W / 45.59306; -122.54861
Carries8 lanes of I-205
CrossesColumbia River
LocalePortland, Oregon to
Vancouver, Washington
Characteristics
DesignConcrete segmental bridge
Longest span600 ft (183 m)
Clearance below144 ft (43.9 m)
History
OpenedDecember 15, 1982
Statistics
Daily traffic166,152 (2019)[1]
Location

Planning for the structure began in earnest in 1964 when it was designated as part of the East Portland Freeway (later renamed Veteran's Memorial Freeway), Interstate 205. Construction began in August 1977. In order to avoid disrupting river traffic, the bridge was built one segment at a time. The segments, weighing upwards of 200 tons, were cast 4 miles (6.4 km) downstream and barged into place. The bridge was opened on December 15, 1982.[2] The finished project cost was $169.6 million: $155.7 million from Federal funds, $4 million from Washington state funds and $9.9 million from Oregon state funds.[3] Three men died during its construction.[4]

It is a twin structure with four lanes in each direction and a 9-foot-wide (2.7 m) bicycle and pedestrian path in between. The bridge is 7,460 ft (2,270 m) long from the Washington side of the river to Government Island and another 3,120 ft (951 m) in length from Government Island to the Oregon side of the river. The main span, near the Washington side, is 600 ft (183 m) long with 144 ft (44 m) of vertical clearance at low river levels. The bridge was named for Glenn Jackson, the chairman of the Oregon State Highway Commission and later the Oregon Economic Development Commission.[5] The average weekday traffic during 2019 was 166,152 vehicles.[1]

Under construction, looking east from the Columbia River around 1980-81

See alsoEdit

ReferencesEdit

  1. ^ a b "Columbia River Bridges". Southwest Washington Regional Transportation Council. Retrieved November 3, 2020. CS1 maint: discouraged parameter (link)
  2. ^ Callister, Scotta (December 16, 1982). "Rain fails to faze bridge-crossers". The Oregonian, p. E12.
  3. ^ Federal-aid Project No. I-205-7(85)315 Contract 8526; Federal-aid Project No. I-205-7(65)314 Contract 8862; Federal-aid Project No. I-205-7(66)315 Contract 8905; Federal-aid Project No. I-205-7(85)314 Contract 9510; Federal-aid Project No. I-205-7(84)314 Contract 9444; Federal-aid Project No. I-205-1(121)0 Washington Approach Contract
  4. ^ Gregg Herrington (September 24, 2008). "First vehicles cross the Glenn L. Jackson Bridge over the Columbia River on December 15, 1982". HistoryLink. Retrieved February 18, 2021.
  5. ^ Russell Sadler (February 5, 2005). "A Recent History of Oregon's Citizen Boards and Commissions". West by Northwest.
  • Sharon Wood (2001). The Portland Bridge Book. Portland, Oregon: Oregon Historical Society. ISBN 0-87595-211-9.

External linksEdit

  Media related to Glenn Jackson Bridge at Wikimedia Commons