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The Spokane Street Bridge, also known as the West Seattle Low-Level Bridge, is a concrete double-leaf swing bridge in Seattle, Washington. It carries Southwest Spokane Street over the Duwamish River, connecting Harbor Island to West Seattle. It has two separate end-to-end swing-span sections, each 480 feet (150 m) long.
West Seattle Bridge seen from the 12th Avenue South viewpoint on Beacon Hill in 2010. A monorail extension to West Seattle in the early 2000s was planned to use the West Seattle Bridge, with elevated columns over the center barrier. [15] The plan was later scaled down to a single-track guideway over the bridge and abandoned entirely in 2005 ...
But the Seattle and Tacoma faults are probably the most serious earthquake threat to the populous Seattle–Tacoma area. A 2002 study of bridge vulnerability estimated that a magnitude 7 earthquake on the Seattle Fault would damage approximately 80 bridges in the Seattle–Tacoma area, [30] whereas a magnitude 9 subduction event would damage ...
The King County Water Taxi connects West Seattle to Downtown Seattle. West Seattle has three bridges over the Duwamish River that connect the peninsula to SODO and Downtown Seattle. The high-level West Seattle Bridge, opened in 1984 and carries seven lanes of traffic on a short freeway that continues towards Interstate 5 on the Spokane Street ...
After the completion of the second bridge in 1930, the newer bridge carried eastbound traffic (away from West Seattle), and the older 1924 bridge carried westbound traffic into the neighborhood. This remained the primary connection between West Seattle and Harbor Island throughout the 1930s, 1940s, 1950s, and 1960s.
One study of seismic vulnerability of bridges in the Seattle – Tacoma area [4] estimated that an M 7 earthquake on the Seattle or Tacoma faults would cause nearly as much damage as a M 9 subduction earthquake. Because the Seattle and Tacoma faults run directly under the biggest concentration of population and development in the region, more ...
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The loop ramp from the West Seattle Bridge to northbound State Route 99 was closed on May 2, 2023, due to the formation of a 5 by 4 feet (1.5 m × 1.2 m) hole that left steel rebar exposed. [5] It reopened a week later after the damaged concrete was removed and replaced by WSDOT crews.