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LaSalle Street Bridge

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Northeast Pivot

When I think of a bascule bridge in Chicago, this is the bridge that I immediately think of. This bridge has been in several movie shoots.

Photo taken by J.R. Manning in May 2010

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Description 

The development of the Chicago trunion bascule bridge occurred during the first three decades of the twentieth century. Despite the controversy over patent infringement--Joseph E. Strauss charged the City of Chicago engineers with infringing on his patented Strauss-Trunion bascule bridge--the Chicago bascule received great acclaim within the civil engineering profession. The LaSalle Street Bridge was erected in the late 1920s after Chicago's city engineers had refined their design of the trunion bascule span.

-- Historic American Engineering Record

Facts 

Overview
Bascule bridge over Main Branch Chicago River on N. LaSalle Street in Chicago
Location
Chicago, Cook County, Illinois
Status
Open to traffic
History
Built 1928
Builders
- Donald Becker (Designer)
- Strobel Steel Construction Co. of Chicago, Illinois (Builder)
- Thomas G. Pihlfeldt (Engineer)
Design
Bascule
Dimensions
Length of largest span: 242.0 ft.
Total length: 347.0 ft.
Deck width: 56.1 ft.
Approximate latitude, longitude
+41.88806, -87.63222   (decimal degrees)
41°53'17" N, 87°37'56" W   (degrees°minutes'seconds")
Approximate UTM coordinates
16/447549/4637540 (zone/easting/northing)
Quadrangle map:
Chicago Loop
Inventory numbers
IL 016-6032 (Illinois bridge number)
BH 15157 (Bridgehunter.com ID)
Inspection (as of 10/2011)
Deck condition rating: Poor (4 out of 9)
Superstructure condition rating: Serious (3 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 11.9 (out of 100)
Average daily traffic (as of 2010)
24,900

Update Log 

  • January 21, 2016: New photos from Royce and Bobette Haley
  • December 1, 2015: New Street View added by Douglas Butler
  • January 26, 2015: HAER photos posted by Dave King
  • October 8, 2013: New Street View added by J.P.
  • May 15, 2010: New photos from J.R. Manning
  • May 10, 2010: New photo from J.R. Manning

Sources 

  • J.R. Manning - thekitchenguy [at] sbcglobal [dot] net
  • Historicbridges.org - by Nathan Holth
  • Historicbridges.org - by Nathan Holth
  • Steve Conro - sconro [at] yahoo [dot] com
  • Douglas Butler
  • J.P. - wildcatjon2000 [at] gmail [dot] com
  • HAER IL-66 - Chicago River Bascule Bridge, LaSalle Street, Spanning Chicago River at North LaSalle Street, Chicago, Cook County, IL
  • Royce and Bobette Haley - roycehaley111 [at] yahoo [dot] com