Glenn L. Jackson Memorial Bridge

Infobox_Bridge
bridge_name= Glenn Jackson Memorial Bridge


caption=
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carries= Interstate 205
crosses= Columbia River
locale= Portland, Oregon to
Vancouver, Washington
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design= Concrete segmental bridge
mainspan= convert|600|ft|m|abbr=on
length=
width=
clearance=
below= convert|144|ft|m|abbr=on
traffic= 137,000
open= December 15, 1982
closed=
toll=
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coordinates= coord|45|35|35|N|122|32|55|W|region:US_type:landmark
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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.

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 four miles (6 km) downstream and barged into place. The bridge was opened on December 15, 1982. The final cost of $175 million was shared by the states of Washington and Oregon. Three men died during its construction.

It is a twin structure with four lanes in each direction and a convert|9|ft|m|abbr=on. wide bicycle and pedestrian path in between. The bridge is convert|7460|ft|m|abbr=on. long from the Washington side of the river to Government Island and another convert|3120|ft|m|abbr=on. in length from Government Island to the Oregon side of the river. The main span, near the Washington side, is convert|600|ft|m|abbr=on. long with convert|144|ft|m|abbr=on. 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. [cite news
title=A Recent History of Oregon's Citizen Boards and Commissions
author=Russell Sadler
date=February 5, 2005
work=West by Northwest
url=http://westbynorthwest.org/artman/publish/article_1011.shtml] As of 2004 the average daily traffic was 137,000 vehicles. [ cite web
url = http://www.oregon.gov/ODOT/COMM/docs/interstate_traffic_counts.pdf
title = Average Daily Traffic on Oregon’s Interstate Highways 1954–2004
publisher = Oregon Department of Transportation
date = May 102006
pages = 4
format = PDF
accessdate = 2007-08-29 ]

References

:* cite book
author = Sharon Wood
title = The Portland Bridge Book
publisher = Oregon Historical Society
location = Portland, Oregon
date = 2001
id = ISBN 0-87595-211-9

Crossings navbox
structure = Crossings
place = Columbia River
bridge = Glenn L. Jackson Memorial Bridge
bridge signs =
upstream = Bonneville Dam
upstream signs =
downstream = Interstate Bridge
downstream signs =