|Bridge Name||Facility Carried / Feature Intersected||Location||Structure Type||Construction Date and Builder/Engineer|
Chicago and Alton Railroad Bridge
||Railroad (Chicago and Alton) Over South Fork South Branch Chicago River||Chicago: Cook County, Illinois||Metal 5 Panel Rivet-Connected Warren Through Truss, Movable: Bascule (Page) and Approach Spans: Metal Girder, Fixed||1906 By Builder/Contractor: American Bridge Company of New York, New York and Engineer/Design: W. M. Hughes of Chicago, Illinois|
|Main Span Length||Structure Length||Roadway Width||Main Spans||Approach Spans|
|150 Feet (45.72 Meters)||214 Feet (65.23 Meters)||34.3 Feet (10.5 Meters)||1||1|
This bridge is an extremely rare example of a Page bascule bridge. The Page bascule's unusual appearance was a patented design in which the counterweight was built into the approach system. It is one of the only remaining examples left of this noteworthy and unusual movable bridge form. This bridge was also designed such that the machinery and other equipment actually acts as part of the bridge's counterweight. In a city that has more movable bridges than any other city in the world, this bridge stands out as one of the most unusual and unique movable bridges in Chicago.
The bridge was reportedly the first Page bascule railroad bridge ever built. It also was reported to be the largest bascule bridge in the world when built, a record that several of Chicago's bridges have held for (often brief) periods of time following their completion. The distinctively shaped curvy racks of this bridge (upon which the pinions run) were noted as the largest individual sections of structural steel ever fabricated to that date in Chicago. Although the Chicago and Alton Railway was the "lead railroad" in supervising the construction of the bridge, it was a joint project including the Illinois Central and Atchison, Topeka, and Santa Fe Railroads as well. Wisconsin Central also had trackage rights upon completion of the bridge under Illinois Central. Work begun on the bridge in March of 1905. The bridge was nearly completed by the end of the year. American Bridge Company was the superstructure contractor, with the steel coming from the Lassig plant in Chicago. G. P. Nichols and Brother of Chicago was the electrical contractor. Thomas Phee Company of Chicago was the substructure contractor. Kelly-Atkinson Construction Company of Chicago erected the superstructure.
The bridge was constructed as a replacement for a former bridge which was kept open during construction. The former bridge was a bobtail swing bridge dating to the 1880s. The construction plan included 24 hours to make the switch from the previous bridge to the new bridge, with an expectation that it would be done in only 10 hours. However, the previous bridge's pinned connections were more rusted that thought and they had difficulty getting them apart during demolition. As a result, it took nearly 25 hours before railroad traffic was again flowing.
Be sure to view the 1907 article (link provided at top of this narrative) which includes several original engineering drawings of the bridge, several photos, and a detailed discussion of the bridge. This article provided the majority of information seen in this HistoricBridges.org narrative.
Sadly, this bridge no longer lifts for boats today. Worse, because of the unusual design of this bridge, it can be difficult to imagine how this bridge's parts work to move the bridge. Fortunately, there is a historical photo, shown to the right, which shows the bridge in its raised position which helps to show the manner in which the bridge lifts. Also note that the drawing shown at the top of this narrative has a shadow underlay that shows the bridge in the raised position.
The bridge is hard to photograph, but if you ride the CTA Orange Line and get off at the Ashland Station, views of this bridge can be had from the station platform.
|The following text below and picture to the right
are from The Bridgemen's Magazine Vol. 7, 1907, Digitized By Google.
The accompanying pictures are of the Page Bascule bridge, erected at Bridgeport, Chicago, over the
south fork of the Chicago River, better known as "Babbly Creek," to replace the Bridgeport draw. The
contract for the superstructure was let to the American Bridge Company and the erection was done by
Kelly-Atkinson Construction Company. T. C. Fisher was in charge of the work, which was done by the
members of Local No. 1. It is the largest bascule bridge In the world, 150 feet in length and a total
weight of 1,130 tons, divided as follows; 550-ton counterweight, 250 tons of which is cast iron and
the remainder punchings, scrap iron, etc., mixed with concrete; 47 tons machinery and 530 tons
structural steel. The rack guides are the largest pieces of structural steel ever turned out in
Chicago, each weighing 70 tons and measuring over 75 feet in length.
The work was done in very good time, considering the delay caused by traffic, for four lines of
railway cross the span, running over 50 passenger trains during the working day of eight hours.
Wishing you success, I am,
Very truly yours,
FRED F. BUCK.
Owner PlaqueBUILT 1906
BY THE CHICAGO & ALTON RY. CO.
G H KIMBALL CHIEF ENGINEER
W H HUGHES CONSULTING ENG'R
PAGE & SHNABLE PATENTEES
Builder PlaqueAMERICAN BRIDGE CO
OF NEW YORK
CONTRACTORS FOR SUPERSTRUCTURE
THOMAS PHEE & CO
CONTRACTORS FOR SUBSTRUCTURE
Information and Findings From Chicago Landmarks Designation
Address: East of Ashland Ave., North of Archer Ave.
(South Fork of the South Branch of the Chicago River)
This Bridge Is A Designated Chicago Landmark
Historic Bridges of Chicago and Cook CountyBrowse Bridges In Google Maps
This special map has bridge markers colored by bridge movable type.
Complete Bridge List
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
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.
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. The book includes dozens of full color photos. Only $9.95 U.S! ($11.95 Canadian). Order Now Direct From The Publisher!
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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