First Avenue South Bridge
First Avenue South Bridge | |
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The original First Avenue South Bridge over the Duwamish, before the construction of the southbound span
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Coordinates | Lua error in package.lua at line 80: module 'strict' not found. |
Carries | SR 99 |
Crosses | Duwamish River |
Locale | Seattle, Washington |
Characteristics | |
Design | Bascule bridge |
Total length | 3,010 ft (920 m) (northbound)[1] 2,895 ft (882 m) (southbound)[1] |
History | |
Opened | 1956 (northbound) 1996 (southbound) |
The First Avenue South Bridge is a pair of double-leaf bascule bridges built between 1956 and 1998 that carry State Route 99 over the Duwamish River about three miles (5 km) south of downtown Seattle, Washington.
The northbound span was built in 1956 to connect the industrial areas northeast of the Duwamish to the residential neighborhoods to the south and southwest. Between 1996 and 1998, the drawspan was retrofitted and the approaches completely demolished and rebuilt. The southbound span opened in 1996 and carried traffic in both directions for two years while the northbound span was rebuilt.
In 2001, the southbound span was damaged by the Nisqually earthquake, knocking its piers 3 inches out of alignment, and was closed briefly for repairs.[2]
From the original construction to February 1995 when the retrofit began, the First Ave S bridge had the highest motor vehicle accident rate in Washington State.[citation needed]
Notes
References
- Lua error in package.lua at line 80: module 'strict' not found. — memoirs of a civil engineer working for the WSDOT on the First Avenue South Bridge
External links
Wikimedia Commons has media related to [[commons:Lua error in Module:WikidataIB at line 506: attempt to index field 'wikibase' (a nil value).|Lua error in Module:WikidataIB at line 506: attempt to index field 'wikibase' (a nil value).]]. |
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- Bascule bridges in the United States
- Bridges in Seattle, Washington
- Bridges completed in 1956
- Bridges completed in 1996
- Road bridges in Washington (state)
- Western United States bridge (structure) stubs
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- Washington (state) transportation stubs