General Information
| Completion: | 1956 |
|---|---|
| Status: | in use |
Project Type
| Structure: |
Double-leaf bascule bridge |
|---|---|
| Function / usage: |
Road bridge |
| Structure: |
bascule span: Deck truss bridge |
| Material: |
bascule span: Steel bridge |
Location
| Location: |
Seattle, King County, Washington, USA |
|---|---|
| Address: | First Avenue |
| Next to: |
First Avenue South Bridge (1998)
|
| Location description: |
Over Duwamish River |
| Coordinates: | 47° 32' 31.50" N 122° 20' 3.24" W |
Technical Information
Dimensions
| total length | 920 m |
Excerpt from Wikipedia
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 February 1997 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 ist piers 3 inches out of alignment, and was closed briefly for repairs.
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.
Text imported from Wikipedia article "First Avenue South Bridge" and modified on July 23, 2019 according to the CC-BY-SA 4.0 International license.
Participants
Currently there is no information available about persons or companies having participated in this project.
Relevant Web Sites
- About this
data sheet - Structure-ID
20051302 - Published on:
04/01/2010 - Last updated on:
09/12/2024
