Alsea Bay Bridge | |
|---|---|
 The 1991 Alsea Bay Bridge | |
| Coordinates | 44°25′55″N124°04′14″W / 44.4319°N 124.0705°W /44.4319; -124.0705 |
| Carries |  US 101 |
| Crosses | Alsea Bay |
| Locale | nearWaldport, Oregon |
| Characteristics | |
| Design | concretearch bridge (both) |
| Total length | 3,011 feet (918 m) (1st) 2,910 feet (890 m) (2nd) |
| Longest span | 450 feet (140 m) |
| Clearance below | 70 feet (21 m) (2nd) |
| History | |
| Construction start | 1988 |
| Opened | 1936 (1st) 1991 (2nd) |
| Closed | 1989 (1st) |
| Location | |
 Interactive map of Alsea Bay Bridge | |
TheAlsea Bay Bridge is a concretearch bridge that spans theAlsea Bay onU.S. Route 101 (US 101) nearWaldport, Oregon.
There have been two bridges on this site.
The first bridge was designed byConde McCullough and opened in 1936. It was a 3,011-foot-long (918 m) reinforced-concrete combinationdeck andthrough arch bridge.
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 continue costly rehabilitation efforts.[1] The first bridge was demolished in 1991.Construction of the second bridge, designed byHNTB, 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 (890 m) in total length, with a 450 ft (140 m) main span that provides 70 ft (21 m) 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.
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