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| Key Facts |
| Bridge Name | Facility Carried / Feature Intersected | Location | Structure Type | Construction Date and Builder/Engineer | |
|---|---|---|---|---|---|
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Michigan Avenue Bridge
DuSable Bridge | Michigan Avenue Over Chicago River | Chicago: Cook County, Illinois | Metal Rivet-Connected Pratt Deck Truss, Movable: Bascule (Fixed Trunnion) and Approach Spans: Metal Stringer (Multi-Beam), Fixed | 1920 By Builder/Contractor: Great Lakes Dredge and Dock Company of Chicago, Illinois and Engineer/Design: City of Chicago |
| Technical Facts |
| Rehabilitation Date | Main Span Length | Structure Length | Roadway Width | Main Spans | Approach Spans | NBI Number |
| 2009 | 256 Feet (78 Meters) | 400 Feet (121.6 Meters) | 64 Feet (19.5 Meters) | 1 | 2 | 16603527325 |


This bridge is commonly known as the Michigan Avenue Bridge,
but officially renamed the DuSable Bridge in October 2010, to honor Jean
Baptiste Pointe DuSable. DuSable was the first non-native settler in Chicago.
Connecting the downtown Loop to the Magnificent Mile, this is essentially the "Main Street Bridge" of Chicago, since it carries a busy roadway including as many as 30,000 pedestrians daily, and has been decorated to give it the feel of a gateway bridge. It is the most well-known of the Chicago bascule bridges. The composition of the trusses are comparable to other bridges in the city, except that this bridge is one of the uncommon common double-deck bridges in the city. The decorations such as the bridge-tender towers on this bridge, and the plaques on the bridge also set this aside from other Chicago bridges. The city has furthered this bridge's unique appearance by flying various flags on the bridge as well.
Most recently, the city of Chicago demonstrated not only their commitment to maintain this landmark historic bridge, but to restore and increase the historic integrity and beauty of the bridge in a unique restoration project executed in 2009. This project actually removed the modern and relatively mundane pedestrian railings on the bridge and placed replicas of the original ornate railings that were present when the bridge was built and had been replaced some years ago. The project has dramatically increased the historic appearance and beauty of the bridge. The project is significant because often railings are ignored during bridge preservation projects. However, the truth is railings are often play a significant role in the aesthetic quality of a historic bridge. Chicago has recognized this and set an example of other owners of historic bridges to follow.
The
southwest bridgetender house of this bridge contains the
McCormick Bridgehouse & Chicago River
Museum.
With an entry fee of only four dollars, this small museum offers a history of
the bridge and the Chicago River, but perhaps one of the most exciting parts of
the museum is that they have opened up a viewing area to the public where you
can view the motors, breaks, trunnion, and other mechanical parts of the movable
bridge that are normally hidden and restricted from the view of the public. Some
of the original electrical equipment that was saved from a previous renovation
project is on display here as well.
From a distance this bridge looks square like the Wells Street Bridge, but if you walk on the lower sidewalk, you will note the bottom chord is arched a bit, and rises above the sidewalk at the middle of the span. Its truss design is more like Ohio Street.
The Michigan Avenue Bridge was constructed as two parallel bridges,
and could actually be lifted independently of each other. If you are on the lower level
or on the Chicago Riverwalk which runs under the bridge, you can see how there
are two trusses at the center of the bridge, and can thus visualize how the
bridge is really two bridges side by side.
An unusual random trivia for this bridge is that in the 1920s, the city installed rubber tile pavement as an experimental surface type.
Both the substructure and superstructure for this bridge was built by the Great Lakes Dredge and Dock Company. This is somewhat unusual, since a lot of Chicago's bascule bridges had separate contractors for superstructure, substructure, and electrical work. Great Lakes Dredge and Dock was a frequent contractor for the substructures of bascule bridges in Chicago. This is an unusual case where the company also erected the superstructure. Formed in 1890 as Lydon and Drews Company, the company changed its name to Great Lakes Dredge and Dock Company in 1905. A local advertisement from that period shows that by that time the company had acquired several other companies. The company survives today and does work around the world according to the company's website.
Information and Findings From Chicago Landmarks DesignationGeneral Information Address: Chicago River, between Michigan and Wabash Architect Information Raised and educated in Chicago, Daniel Hudson
Burnham (1846-1912) gained his early architectural experience with
William Le Baron Jenney, the so-called "father of the skyscraper." In
1873, Burnham formed a partnership with John Wellborn Root (1850-1891)
that produced such commissions as the Kent House, Masonic Temple
(demolished), Monadnock Building, Reliance, Rookery, St. Gabriel's
Church, and the Union Stock Yard Gate. This Bridge Is A Designated Chicago Landmark |
Above: The infamous Rush Street Bridge, the predecessor to the Michigan Avenue Bridge. Located a short distance west of Michigan Avenue, Rush Street and its bridge were an extremely busy bottleneck for Chicago. The extent of this bottleneck can be seen in two of the above photos, where what could only be described as a horse and buggy traffic jam is visible. Although the statements validity cannot be verified, one photo caption describes the bridge as "the most crowded vehicular bridge in the world." What was certainly true however, was the need for the Michigan Avenue Bridge.
Above: This photo shows an earlier Rush Street swing bridge that preceded the final Rush Street swing bridge. This earlier bridge, built in 1856, was described as an "all iron bridge." As such, this bridge would have been among the earliest iron bridges built in the United States.
Below: In 1908, Albert Scherzer proposed the below "artistic" design for a Michigan Avenue Bridge. He got inspiration for the design from Pont Alexandre III in Paris, France, which had been completed in 1900. ![]() |
Below: Joseph Strauss proposed the below extravagant design for a Michigan Avenue Bridge in 1913. The appearance of the bridge appears to be somewhat inspired by the Tower Bridge in London, England. The bridge was described in The American City as follows: "The design illustrated herewith shows a form of movable bridge which has been proposed by the Strauss Bascule Bridge Company for the span to be built across the Chicago River at Michigan Avenue, Chicago, connecting the North and South Side Boulevards. It is of the vertical lift form, having neither cables nor chains, the counterbalancing being effected through levers which form a part of the suspension trusses from which the span and the load it carries are hung." |
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Historic Bridges of Chicago and Cook CountyBrowse Bridges In Google MapsThis special map has bridge markers colored by bridge movable type. Complete Bridge List |
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Chicago and Cook County are home to one of the largest collections of historic bridges in the country, and no other city in the world has more movable bridges. HistoricBridges.org is proud to offer the most extensive coverage of historic Chicago bridges on the Internet.
Chicago / Cook County Bridge NewsMay 15, 2013 - The Ashland Avenue Bridge over North Branch Chicago River has been recommended for Chicago Landmark designation by the Chicago Art Deco Society.
April 30, 2013 - Illinois Landmarks has included Chicago's Bascule Bridges as one of their Top 10 Most Endangered Historic Places. View The Official Page.
April, 2013 - The replacement of the outer trusses of the northern Wells Street Bridge bascule leaf is underway. The outer trusses of the southern bascule leaf has already been completed.
April 2013 - Spring Bridge Lifts Are Ongoing! The bridge lift schedule is available here.
Washington Boulevard Bridge - This bridge celebrates its 100th Anniversary on May 26, 1913! Click Here To View A Commemoration Article By ChicagoLoopBridges.com! (Alternate PDF Format)
General Chicago / Cook County Bridge ResourcesChicago's Bridges - By Nathan Holth, author of HistoricBridges.org, this book provides a discussion of the history of Chicago's movable bridges, and includes a virtual tour discussing all movable bridges remaining in Chicago today. The book includes dozens of full color photos. Only $9.95 U.S! ($11.95 Canadian). Order Now Direct From The Publisher!
View Historic American Engineering Record (HAER) Overview of Chicago Bascule Bridges (HAER Data Pages, PDF)
Chicago Loop Bridges - Chicago Loop Bridges is another website on the Internet that is a great companion to the HistoricBridges.org coverage of the 18 movable bridges within the Chicago Loop. This website includes additional information such as connections to popular culture, overview discussions and essays about Chicago's movable bridges, additional videos, and current news and events relating to the bridges.
Additional Online Articles and Resources - This page is a large gathering of interesting articles and resources that HistoricBridges.org has uncovered during research, but which were not specific to a particular bridge listing.
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Click on a thumbnail or gallery name below to visit that particular photo gallery. If videos are available, click on a video name to view and/or download that particular video.
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Structure Overview
Original / Full Size Photos |
A collection of overview photos that show the bridge as a whole and general areas of the bridge. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution. |
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Additional Overviews
Original / Full Size Photos |
Additional overview photos including from before the 2009 restoration was completed, views during St. Patricks Day with the green river, night views, and other special events. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution. |
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Structure Details
Original / Full Size Photos |
A collection of detail photos that document the parts, construction, and condition of the bridge. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution. |
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Buildings and Plaques
Original / Full Size Photos |
Photos of the plaques and bridgetender buildings including the bas relief sculptures. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution. |
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Interior
Original / Full Size Photos |
Photos taken in the McCormick Bridgehouse & Chicago River Museum. Photos showing the structural interior of the bridgetender building, as well as the interior electrical mechanical equipment for the bridge including gears, drive system, and trunnion. Also includes views looking out from the top level of the bridgetender building. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution. |
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Structure Overview
Mobile Optimized Gallery |
A collection of overview photos that show the bridge as a whole and general areas of the bridge. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem
(dial-up) users, or those who do not wish to wait for the longer
download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
Browse Gallery With Popup Viewer |
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Additional Overviews
Mobile Optimized Gallery |
Additional overview photos including from before the 2009 restoration was completed, views during St. Patricks Day with the green river, night views, and other special events. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem
(dial-up) users, or those who do not wish to wait for the longer
download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
Browse Gallery With Popup Viewer |
|
Structure Details
Mobile Optimized Gallery |
A collection of detail photos that document the parts, construction, and condition of the bridge. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem
(dial-up) users, or those who do not wish to wait for the longer
download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
Browse Gallery With Popup Viewer |
|
Buildings and Plaques
Mobile Optimized Gallery |
Photos of the plaques and bridgetender buildings including the bas relief sculptures. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem
(dial-up) users, or those who do not wish to wait for the longer
download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
Browse Gallery With Popup Viewer |
|
Interior
Mobile Optimized Gallery |
Photos taken in the McCormick Bridgehouse & Chicago River Museum. Photos showing the structural interior of the bridgetender building, as well as the interior electrical mechanical equipment for the bridge including gears, drive system, and trunnion. Also includes views looking out from the top level of the bridgetender building. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem
(dial-up) users, or those who do not wish to wait for the longer
download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
Browse Gallery With Popup Viewer |
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Bridge Being Raised Full Motion Video |
Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing. |

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