- Alsea Bay Bridge
bridge_name = Alsea Bay Bridge
caption = The 1991 Alsea Bay Bridge
crosses = Alsea Bay
locale = near
design = concrete
mainspan = convert|450|ft|m
length = convert|3011|ft|m (1st)
below = convert|70|ft|m (2nd)
begin = 1988
open = 1936 (1st)
closed = 1989 (1st)
coordinates = coord|44.43193|N|124.07055|W|display=inline,title
The Alsea Bay Bridge is a concrete
arch bridgethat spans the Alsea Bayon U.S. Route 101 near Waldport, Oregon.
There have been two bridges on this site.
The first bridge was designed by
Conde McCulloughand opened in 1936. It was a convert|3011|ft|m long, reinforced-concrete combination deck and through arch bridgebuilt 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.
title = Great American Bridges and Dams
publisher = Wiley
date = 1988
pages = p.327
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.
* [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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