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historic and notable bridges of the u.s.
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Design
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Winfred T. Robertson
Duwamish River Bridge
(King County, Washington)
Designer, 1956
Bascule bridge over Duwamish River on WA 99 in Seattle
Open to traffic
© Copyright 2002-13,
James Baughn
and
contributors
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http://bridgehunter.com/category/builder/winfred-t-robertson/