Harbor Island, Seattle


Harbor Island, Seattle is an artificial island which was created in 1909. At the time of its completion, Harbor Island, Seattle, with an area of roughly 350 acres, was the biggest island built by man. However Treasure Island, built in 1938 in San Francisco Bay, proved to be a bigger island. Currently Port Island in Japan and Rokko Island are greater in size than Harbor Island.

Harbor Island is seismically unstable as it has been built above a river delta, it is. At the time of the earthquake in 1949, some parts of the island got lifted by16 inches, while other parts fell down by 12 inches.

History of Harbor Island, Seattle

The Seattle General Construction Company got a permit in 1900 to fill up the tide flats, located at the mouth of River Duwamish. The Puget Sound Bridge and Dredging Company got the contract to construct an
island in that location. To proceed, soil collected from the regrade projects or operations, were transported in big pipes by using placer mining technology. Silt was carried from the river bed by using dredges in order make the channel deeper. Harbor Island was finally created in 1909 by using about 24 million cubic yards of the transported soil.

Industries in Harbor Island, Seattle

The island is crucial for the economy of the state through its notable flour milling and ship building industries. The Fisher Flouring Mills moved to the island in as early as 1911. Associated Shipyards was begin by Puget Sound Bridge and Dredging Company.

Harbor Island, Seattle is extremely important as in 2001 it became the site for the construction of Port of Seattle's Terminal 18, many petroleum terminals and Todd Shipyards.

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Seattle Location and Orientation
Port of Seattle
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Lake Washington Ship Canal
Seattle Fault
Harbor Island, Seattle
Seattle Lakes