Alsea Bay Bridge

Infobox Bridge
bridge_name = Alsea Bay Bridge



caption = The 1991 Alsea Bay Bridge
official_name =
carries =
crosses = Alsea Bay
locale = near Waldport, Oregon
maint =
id =
design = concrete arch bridge (both)
mainspan = convert|450|ft|m
length = convert|3011|ft|m (1st)
convert|2910|ft|m (2nd)
width =
height =
load =
clearance =
below = convert|70|ft|m (2nd)
traffic =
begin = 1988
complete =
open = 1936 (1st)
1991 (2nd)
closed = 1989 (1st)
toll =
map_cue =
map_

map_text =
map_width =
coordinates = coord|44.43193|N|124.07055|W|display=inline,title
lat =
long =

The Alsea Bay Bridge is a concrete arch bridge that spans the Alsea Bay on U.S. Route 101 near Waldport, Oregon.

History

There have been two bridges on this site.

The first bridge was designed by Conde McCullough and opened in 1936. It was a convert|3011|ft|m long, reinforced-concrete combination deck and through arch bridge built in 1936.

The hostile environment caused significant corrosion to the steel reinforcements. In 1972 the Oregon Department of Transportation began projects aimed at extending the life of the bridge. By the mid 1980s it was decided to replace the bridge rather than continuing costly rehabilitation efforts. The first bridge was demolished around 1989 [* cite book
last = Jackson
first = Donald C.
authorlink =
coauthors =
title = Great American Bridges and Dams
publisher = Wiley
date = 1988
location =
pages = p.327
url =
doi =
id =
isbn =
] .

Construction of the second bridge began in 1988 and it was opened in the fall of 1991 at a cost of $42.4 million. The bridge is 2,910 ft in total length, with a 450 ft main span that provides 70 ft. of vertical clearance. The bridge has a latex concrete deck and the piers are significantly thicker than normal in an attempt to thwart corrosion. Its life expectancy is 75 to 100 years.

References

External links

* [http://www.bridgemeister.com/pic.php?pid=794 Photos]
* [http://www.oregonstateparks.org/park_202.php Alsea Bay Bridge Interpretive Center]
* [http://hdl.loc.gov/loc.pnp/hhh.or0288 Survey number HAER OR-14] - Old Alsea Bay Bridge, Spanning Alsea Bay at Oregon Coast Highway, Waldport, Lincoln County, OR
* [http://www.pixelmap.com/sl_bridge_coast.html#alsea Alsea Bay Bridge Photo Gallery]


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