| 词条 | Spokane Street Bridge |
| 释义 |
| bridge_name = Spokane Street Bridge | native_name = | native_name_lang = | image = Spokane Street Bridge - view from east approach of swing span turned (2009).jpg | image_size = | alt = | caption = One of the bridge's swing-span sections turned | official_name = | other_name = | carries = Spokane Street | crosses = Duwamish River | locale = Seattle, Washington, U.S. | owner = | maint = | id = | architect = | designer = | engineering = | design = Concrete swing bridge | material = | length = | width = | height = | mainspan = {{convert|480|ft|m}} | spans = | pierswater = | load = | clearance = | below = | life = | builder = | fabricator = | begin = | complete = | cost = | open = 1991 | inaugurated = | toll = | traffic = | preceded = | followed = | heritage = | collapsed = | closed = | replaces = | map_cue = | map_image = | map_alt = | map_text = | map_width = | coordinates = | lat = | long = | references = | extra = }} 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 {{convert|480|ft|m|adj=off}} long. Its construction was finished in 1991, replacing an earlier bridge destroyed by a collision. It is named after Spokane Street, which itself is named after Spokane, Washington, which is named after the Spokane people. Each {{convert|7500|short ton|MT|adj=on}} leaf of the bridge floats on a {{convert|100|in|m|adj=on}} steel barrel in hydraulic oil, situated in center piers at each side of the river. As the bridge intersects the river at an oblique angle, both leaves rotate only 45 degrees (one-eighth turn) to clear the shipping channel instead of the 90-degree turn of most swing spans.[1] It is claimed[2] to be the only bridge of its type in the world and it has received several awards for its innovation, including the Outstanding Engineering Achievement Award of the American Society of Civil Engineers in 1992.[3] The bridge was featured in a 2007 episode of Really Big Things shown on the Discovery Channel. History{{main article|West Seattle Bridge#History}}The original bridge at this location was a 1924 bascule bridge. This bridge was constructed to replace it after a long drawn out process to secure funding. Its construction was as part of the construction of the larger West Seattle Bridge next to it. References1. ^{{cite web|title=West Seattle Connection: World's Only Hydraulically Operated Double-Leaf Concrete Swing Bridge|url=http://courses.washington.edu/cm510/Swing.pdf|publisher=City of Seattle Engineering Department|accessdate=25 February 2014}} 2. ^"Bridges and Roadway Structures" Seattle Department of Transportation. Retrieved September 3, 2017. 3. ^{{citation|publisher=American Society of Civil Engineers|title=ASCE Honors and Awards: Outstanding Civil Engineering Achievement, 1992 [listed as West Seattle Low Level Bridge]|accessdate=June 9, 2013|url=http://content.asce.org/handa/PastOCEAWinners.html#1992}} External links{{Commons category-inline|Spokane Street Bridge}}{{Bridges of Seattle}}{{Crossings navbox|structure = Crossings |place = Duwamish River |bridge = Spokane Street Bridge |bridge signs = |upstream = West Seattle Bridge |upstream signs = |downstream = Elliott Bay |downstream signs = }}{{Washington-bridge-struct-stub}} 6 : Bridges in Seattle|Bridges completed in 1991|Swing bridges in the United States|Road bridges in Washington (state)|1991 establishments in Washington (state)|Concrete bridges in the United States |
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