||Bridges - Railroad Bridge Across the Calumet River
||South Chicago, IL. Substructure of new bascule bridge across the Calumet River, built for the Chicago & Western Indiana Railroad Company for Great Lakes Dredge & Dock Company. Bridge design is described as a single leaf bascule bridge, also called a "jack knife" bridge. Page 102 from Great Lakes Dredge & Dock Company book.
||1623; http://www.pullman-museum.org/cgi-bin/pvm/mainRecordDisplayXML.pl?recordid=10516; 82-218-p102
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||Southeast Chicago Historical Society