Lake Shore and Michigan Southern Railway, Bridge No. 6

Lake Shore and Michigan Southern Railway, Bridge No. 6
Bridge No. 6 in 1999.
Coordinates	41°43′11″N 87°32′34″W / 41.71972°N 87.54278°W / 41.71972; -87.54278
Carries	Two tracks per span, four total
Crosses	Calumet River
Locale	Chicago, Illinois
Maintained by	Norfolk Southern Railway
Characteristics
Design	Vertical-lift bridge
Material	Steel
Width	31 feet (9.4 m) each span[1]
Longest span	209.75 feet (63.9 m)[1]
No. of spans	Two parallel
History
Designer	Waddell & Harrington
Constructed by	Dravo Contracting Company
Construction start	1912
Construction end	1915
Location

Lake Shore and Michigan Southern Railway, Bridge No. 6 is a steel vertical-lift bridge consisting of two parallel spans, carrying two tracks each, across the Calumet River in Chicago, Illinois, United States. The structure is currently owned by Norfolk Southern Railway but disused and kept in a raised position.^[2]

The current structure replaces an earlier swing bridge on the same site, built for the Lake Shore and Michigan Southern Railway. When the United States Army Corps of Engineers began calling for its replacement in 1909, both single- and double-leaf bascule bridge options were considered, as well as vertical-lift options. Construction began on foundations for a single, four-track vertical-lift span before changing to the two parallel two-track spans that were completed in 1915.^[1]

The bridge was designated as a Chicago Landmark on December 12, 2007.^[3]

• List of bridges documented by the Historic American Engineering Record in Illinois
• List of Chicago Landmarks