Manson Construction

of Seattle, Washington
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Agate Passage Bridge (Kitsap County, Washington)
Built 1950
Cantilevered through truss bridge over Agate Passage on WA 305 in Suquamish
Open to traffic

Lyons Ferry Bridge (Columbia County, Washington)
Contractor, 1927
Cantilevered through truss bridge over Snake River on WA 261
Open to traffic

Morrison Street Bridge (1958) (Multnomah County, Oregon)
Contractor, 1958
Bascule bridge over Willamette River on Morrison Street in Portland
Open to traffic

Portage Canal Bridge (Jefferson County, Washington)
Contractor, 1951
Beam bridge over Portage Canal on WA 116
Open to traffic

Snohomish River Bridge (Southbound) (Snohomish County, Washington)
Contractor, 1954
Vertical lift bridge over Snohomish River on southbound WA-529
Open to traffic

US 101 Chehalis River Bridge (Grays Harbor County, Washington)
Contractor, 1955
Warren deck truss bascule bridge over Chehalis River on US 101 in Aberdeen
Open to traffic

Vantage Bridge (Kittitas County, Washington)
Substructure, 1962
Steel through arch bridge over Columbia River on I-90
Open to traffic