The Alaskan Way Seawall is a seawall which runs for 7,000 feet along the Elliott Bay waterfront southwest of downtown Seattle from Bay Street to S. Washington Street. It was built to provide level access to Seattle's piers and supports the Alaskan Way Viaduct and Alaskan Way itself, which is a surface street. Completed in 1934, the seawall was built on top of wood piling which has significantly deteriorated due to wood eating gribbles. In addition, everything behind the seawall from Alaskan Way to Western Avenue is built on top of fill, making for a very dangerous situation should a large earthquake occur. The viaduct itself is particularly at risk; experts give a 1-in-20 chance that it could be shut down by an earthquake within the next decade, and so plans are underway to replace both seawall and viaduct. The seawall replacement is estimated to cost $800 million US dollars. See Alaskan Way Viaduct for more information on the replacement project. Seawall protecting homes from storm waves and beach erosion. ... Elliott Bay and the Seattle waterfront, looking north from the Pacific Coast Co. ... Downtown Seattle, from top of Space Needle (looking south) Map of downtown Seattle Downtown is a neighborhood in Seattle, Washington. ... A pier in LillebÃ¦lt, Denmark A pier was originally a raised walkway over water that is supported by piles or pillars, as opposed to a quay or wharf. ... The Alaskan Way Viaduct, looking southeast The Alaskan Way Viaduct is an elevated section of Washington State Route 99 that runs along the Elliott Bay waterfront in Seattles Industrial District and downtown. ... 1934 was a common year starting on Monday (link will take you to calendar). ... Look up Pile in Wiktionary, the free dictionary A pile is one type of building foundation. ... Species See text. ... In civil engineering, a Fill is an artificial ridge or dam of earth or gravel constructed to support a prepared right-of-way such as a railroad or highway across a valley or depression. ... Global earthquake epicenters, 1963â1998 An earthquake is a sudden and sometimes catastrophic movement of a part of the Earths surface. ... The Alaskan Way Viaduct, looking southeast The Alaskan Way Viaduct is an elevated section of Washington State Route 99 that runs along the Elliott Bay waterfront in Seattles Industrial District and downtown. ...
City of Seattle Department of Transportation: Seawalls
Washington State Department of Transportation Alaskan Way Viaduct and Seawall Replacement Project
Categories: US buildings and structures stubs | Seattle, Washington
Seawalls are associated with reduced aesthetic value, and increased erosion at the ends and in front of the seawall.
A seawall was chosen as the least expensive approach to protecting the property and it has increased the value of the properties it protects.
The seawall is far enough up the beach that it isn't exposed to seawater except at high tides and the additional erosion in front of the seawall may only affect the creatures of the supra-littoral zone.
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