The St. John Bridge is part of two historic surveys. The first is the Historic Resource Inventory. It was a survey done by the Historic Resource Commission of the City of Portland in the mid-1980s. The bridge's ID on this survey is 50326. The second survey is the national Historic American Engineering Record. The National Parks Service, Library of Congress, and American Society of Civil Engineers established this to document the historic engineering and industrial sites. The St. Johns Bridge's survey ID is HAER OR-40

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