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100th Street Bridge

100th Street Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: August 11, 2006, September 7, 2011, and September 10, 2012

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Key Facts

Facility Carried / Feature Intersected
100th Street Over Calumet River
Location
Chicago: Cook County, Illinois: United States
Structure Type
Metal Rivet-Connected Pratt Pony Truss, Movable: Double Leaf Bascule (Fixed Trunnion) and Approach Spans: Metal Stringer (Multi-Beam), Fixed
Construction Date and Builder / Engineer
1927 By Builder/Contractor: Ketler-Elliott Company of Chicago, Illinois and Engineer/Design: City of Chicago

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
233 Feet (71.02 Meters)
Structure Length
326 Feet (99.36 Meters)
Roadway Width
38 Feet (11.58 Meters)
Spans
1 Main Span(s) and 4 Approach Span(s)
NBI Number
16604226833

Historic Significance Rating (HSR)

Bridge Documentation

View Archived National Bridge Inventory Report - Has Additional Details and Evaluation

View A Historical Article About Charles Fitz Simons

This bridge is an unaltered, still functioning, and excellent example of a traditional Chicago bascule bridge on the Calumet River. Its trusses follow a similar design to some of the other bascule bridges on the Calumet River as well as on the Sanitary and Ship Canal. The bridge retains its original, handsomely decorated bridgetender buildings and the historic integrity of the trusses is good as well. It would appear that the original pedestrian railings have been replaced however.

The Ketler-Elliott Company constructed the superstructure, while the Fitzsimons and Connell Company constructed the substructure. A photo of founder Charles Fitz Simons is shown below.

Charles Fitz Simons

Thanks to Tom Winkle for providing boat transportation to assist in the photo-documentation of this historic bridge.

Rivet Forge

Side Note: Heating Rivets In The Field

Truss bridges with riveted connections like the 100th Street Bridge required riveting in the field where the members of the truss were riveted together at the connection gusset plates. In the field, rivets would be heated in a portable forge. One of the most common types is shown to the left, with a diagram of the blower for this forge shown to the right. Larger forges were also used to efficiently heat larger quantities of rivets, and these were called rivet furnaces. A few examples from the early 20th Century are shown below.

Portal Rivet FurnacesRivet Forge Blower Diagram

Main Plaque

WM HALE THOMPSON
MAYOR
RICHARD W. WOLFE
COMMISSIONER OF PUBLIC WORKS

LORAN D. GAYTON
CITY ENGINEER

THOS G. PIHLFELDT
ENGINEER OF BRIDGES
EDWARD F. MOORE
DEPUTY COMMISSIONER OF PUBLIC WORKS

MYRON B. REYNOLDS
ASSISTANT CITY ENGINEER

DONALD N. BECKER
ENGINEER OF BRIDGE DESIGN

CHICAGO PLAN COMMISSION

BENNETT PARSONS & FROST - CONSULTING ARCHITECTS

CHICAGO CHAPTER OF AMERICAN INSTITUTE OF ARCHITECTS

ILLINOIS SOCIETY OF ARCHITECTS

CHICAGO ART COMMISSION


CLARENCE S. ROWE
ENGINEER OF BRIDGE CONSTRUCTION

FITZSIMONS & CONNELL DREDGE & DOCK CO.
SUBSTRUCTURE

NORWOOD-NOONAN CO.
ELECTRICAL EQUIPMENT
FRANK A. BERRY
RESIDENT ENGINEER

THE KETLER-ELLIOTT CO.
SUPERSTRUCTURE

RALPH H. SIMPSON CO.
HOUSES & ENCLOSURES

JAMES J. BARRETT - PLUMBING

1927

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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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Photo Galleries and Videos: 100th Street Bridge

 
View Photo Gallery
Structure Overview
Original / Full Size Photos
A collection of overview photos that show the bridge as a whole and general areas of the bridge. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
Structure Details
Original / Full Size Photos
A collection of detail photos that document the parts, construction, and condition of the bridge. This gallery offers photos in the highest available resolution and file size in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
Structure Overview
Mobile Optimized Photos
A collection of overview photos that show the bridge as a whole and general areas of the bridge. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Photo Gallery
Structure Details
Mobile Optimized Photos
A collection of detail photos that document the parts, construction, and condition of the bridge. This gallery features data-friendly, fast-loading photos in a touch-friendly popup viewer. Alternatively, Browse Without Using Viewer
View Video
Bumpercam: Westbound Crossing
Full Motion Video
Note: The downloadable high quality version of this video (available on the video page) is well worth the download since it offers excellent 1080 HD detail and is vastly more impressive than the compressed streaming video. Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.
View Video
Bumpercam: Eastbound Crossing
Full Motion Video
Note: The downloadable high quality version of this video (available on the video page) is well worth the download since it offers excellent 1080 HD detail and is vastly more impressive than the compressed streaming video. Streaming video of the bridge. Also includes a higher quality downloadable video for greater clarity or offline viewing.

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