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North Avenue Bridge

North Avenue Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: August 12, 2006

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Key Facts

Facility Carried / Feature Intersected
North Avenue Over North Branch Chicago River
Chicago: Cook County, Illinois: United States
Structure Type
Metal Rivet-Connected Pratt Through Truss, Movable: Double Leaf Bascule (Fixed Trunnion) and Approach Spans: Metal Stringer (Multi-Beam), Fixed
Construction Date and Builder / Engineer
1907 By Builder/Contractor: American Bridge Company of New York, New York and Engineer/Design: City of Chicago

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
173 Feet (52.73 Meters)
Structure Length
273 Feet (83.21 Meters)
Roadway Width
36 Feet (10.97 Meters)
1 Main Span(s) and 4 Approach Span(s)
NBI Number

Historic Significance Rating (HSR)

Bridge Documentation

This bridge no longer exists!

View Historic American Engineering Record (HAER) Documentation For This Bridge

This Historic Bridge Was Demolished in September 2006!

HAER Data Pages, PDF

Excerpts From The 1907 Annual Report of the Department of Public Works

Cortland Street BridgeThis bridge was one of the most important bascule bridges in the city, since it was an example of a first generation bascule bridge, modeled after the Cortland Street Bridge, the first Chicago type trunnion bascule bridge ever built. The superstructure contractor for the North Avenue Bridge was Roemheld and Gallery. The superstructure contractor for the North Avenue Bridge was Roemheld and Gallery. The substructure contractor was Jackson and Corbett. The American Bridge Company fabricated the bridge. John C. Penn, Assistant Engineer, was the local engineer in charge of the work.

During construction of the bascule bridge, a temporary pontoon bridge was built to carry traffic. Like other pontoon bridges the city once had, the floating bridge could be swung out of the way for boats. This particular pontoon bridge operated by two paddle wheels mounted on the pontoon and driven by electric motor. This operation differed from other pontoon bridges in the city, which were opened by winding a chain around a drum which would pull on the pontoon bridge, causing it to swing open.

The first documented bridge at this location was a hand-turned bridge built of wood in 1865 by N. Chapin and Company. It was rebuilt in 1877 as an iron/wood combination bridge on Conro, Carkin, and Company.

Many bridge enthusiasts know that Chicago is the bascule bridge capital of the world. The bascule bridge type of bridge was developed there, and to this day no other city on the planet has more bascule bridges. Given this, one would think that these bridges in Chicago would be preserved and considered the pride and joy of the city. For the most part, this appears to be the case, with some exceptions. The North Avenue Bridge is one of those exceptions. One of the oldest bascule bridges in the city, and with ornate portal designs and builder plaques, city officials chose to demolish this historic bridge, wiping out a critical part of what makes Chicago the beautiful and prosperous city it is today.

Cortland Street BridgeIn its place, city officials were excited to be building a "suspension bridge" that they said looks like the Golden Gate Bridge. However, the bridge that was constructed looks absolutely nothing like the Golden Gate Bridge in San Francisco. The new bridge at North Avenue is far smaller and it has cable stays. The tower design is completely different, and the bridge is much more plain looking overall compared to the majestic Golden Gate Bridge. The design Chicago has come up with looks like a half cable-stayed half suspension bridge. A few photos of this replacement bridge can be found at the end of the HistoricBridges.org photo gallery for the bridge. Undoubtedly, the bridge is far more interesting and creative than the typical pre-stressed concrete box beam bridge that forms the structure for most modern crossings. However, was this bridge the appropriate thing for Chicago? A lot of time and design effort probably went into this bridge. Time that would have probably been better spent planning a solution that would have preserved at least some aspects of the historic North Avenue bascule bridge while at the same time meeting the demands of traffic on the road. What could have been done? A new two-lane bridge could have been built next to the historic bridge and the historic bridge restored, forming a one-way couplet where each bridge would serve one-way traffic. Indeed, during construction, a temporary bridge was constructed next to the historic bridge demonstrating that enough land was available for this preservation solution. Alternatively, if complete removal and replacement was determined to be the best option, the trusses of the historic bridge could have been salvaged. The new bridge could have been of a simpler design, and then the trusses could have been placed on the bridge as a decorative enhancement and memorial to the historic bridge. This solution would have at least salvaged some of the original historic bridge material and kept it visible and accessible to the public. Another problem with the replacement bridge is the plaque. The plaque reads "First Erected 1906" and "Reconstructed 2007." While the previous bridge, the historic bascule bridge, was built in 1906, the North Avenue Bridge was "first erected"  sometime before that. For example, an 1862 annual report for the city mentions a North Avenue Bridge.

Fred A. BusseJohn J. HanbergDuring the construction of this bridge engineers and newspapers kept talking about how this new bridge, in their minds, looks like the Golden Gate Bridge. It was like they were jealous of San Francisco. A great city like Chicago need not be jealous of San Francisco. Chicago should instead seek to continue to embrace the the beauty and heritage of the movable bridges in the city, which define Chicago's historic identity just like San Francisco's Golden Gate Bridge. The North Avenue Bridge was part of what defined Chicago's unique transportation heritage. The North Avenue Bridge was among the oldest bascule bridges in Chicago, and was similar to the oldest, which is Cortland Street Bridge. As evidence of how deep its heritage goes, consider the below photograph from 1907. Look at how different the scene around the bridge then was from what it was today. The entire world changed around the bridge, but the bridge had remained. The North Avenue Bridge was one of the last glimpses of Chicago's heritage at this location.

Be sure to view the excerpts from the 1907 annual report of the department of public works. It has an interesting discussion of the bridge. The cartoon to the right and the photo below both show Fred A Busse, who was mayor at the time that this bridge was constructed.

Cortland Street Bridge RaisedFred A. Busse

Cortland Street Bridge

City Plaque







Builder Plaque





Modern Non-Historic Replacement Bridge Plaque









Historic Bridges of Chicago and Cook County

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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 News

October 2015 - Patrick T. McBriarty, author of Chicago's River Bridges, informs HistoricBridges.org that in recognition for the "outstanding and original reference work that will support future scholarship in the history of technology", the book was awarded the biennial Eugene S. Ferguson Prize by the Society for the History of Technology (SHOT) at the SHOT Annual Meeting's awards banquet. See press release. This is the third award for this book. Order Now Direct From The Publisher! or order on Amazon.

October 23, 2015 - The Franklin Street Bridge celebrates its 95th Anniversary. Please view this announcement prepared by Chicago Loop Bridges or view it on the Chicago Loop Bridges Website.

September 2015 - Fall Bridge Lift Season is Underway. View Schedule.

May 2015 - Michigan Avenue Bridge celebrates its 95th Birthday this month! Click here for a news article.

October 2014 - A visit to Chicago revealed that the Van Buren Street Pedestrian Bridge was not demolished, but instead extensively rehabbed. The railings are new, but replicate the original design. The concrete encasement was removed and not replaced, and instead the exposed riveted steel beams have been painted. The riveted beams look quite nice, and given the condition of the bridge prior to the project this seems like a good outcome. In other news, the rehabilitation and repainting of the La Salle Street Bridge is ongoing, and the project to extend the Chicago Riverwalk under additional bridges on the Main Branch is continuing.

September 2014 - Chicago's dubious distinction of offering numerous boat tours that pass under the bridges but offer narration only of the buildings has ended with the start of a Wendella tour that focuses on bridges! Information is here.

July 29, 2013 - A project study has been initiated for the reconstruction of historic North Lake Shore Drive. This project puts a large number of historic bridges at risk for demolition and replacement. However, it could also be an opportunity to rehabilitate the bridges. Visit the project website.

May 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.

General Chicago / Cook County Bridge Resources

Chicago'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. Despite this broad coverage, the book is presented in a compact format that is easy to take with you and carry around for reference on a visit to Chicago. The book includes dozens of full color photos. Only $9.95 U.S! ($11.95 Canadian). Order Now Direct From The Publisher! or order on Amazon.

Chicago River Bridges - By Patrick T. McBriarty, this is a great companion to Holth's book shown above. This much larger book offers an extremely in-depth exploration of Chicago's movable highway bridges, including many crossings that have not existed for many years. Order Now Direct From The Publisher! or order on Amazon.

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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