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CN Michigan Avenue Bridge (Near South Side)

Through Plate Girder Bridge over Michigan Avenue
Near South Side, Chicago, Cook County, Illinois

Click the Photo Above to See All Photos of This Bridge!
Name CN Michigan Avenue Bridge (Near South Side)
Built By St. Charles Air Line
Contractor Detroit Bridge & Iron Works of Detroit
Currently Owned By Canadian National Railway
Length 96 Feet Total, 52 Foot Main Span
Width 4 Tracks, 2 In Use
Height Above Ground 13 feet 6 Inches
Superstructure Type Through Plate Girder
Substructure Type Stone Masonry and Steel Tower
Date Built 1899
Date Replaced 2021
Traffic Count 0 Trains/Day (Bridge has been Replaced)
Current Status Replaced by a new bridge
CN Bridge Number 2.01
Significance Local Significance
Documentation Date December 2018
In the early 1850s, the St. Charles Air Line constructed a railroad from the Illinois Central Railroad, near present day Soldier Field, to Western Avenue near Ogden Avenue.
The railroad was jointly owned by the Illinois Central Railroad, Michigan Central Railroad, Chicago & North Western Railway and the Chicago, Burlington & Quincy Railroad.
The purpose of the route was to provide a centralized route to connect two eastern railroads to two western railroads.
In the late 1890s, a track elevation was constructed south of downtown Chicago.
Today, the railroad still exists, and is jointly owned by the Canadian National Railway, Union Pacific Railroad and BNSF Railway. In downtown Chicago, the route has significant restrictions, due to aging infrastructure.
12/03/21


This through girder bridge crossed Michigan Street north of 16th Street.
Built in 1899, the bridge featured a trio through girder spans, set onto stone and steel substructures. Unlike other bridges along this route, the piers of this bridge were an ornate design,
As part of an upgrade of the St. Charles Airline, the bridge was replaced between 2020 and 2021. However, the plan is to preserve at least part of the decorative piers for reuse. It is unknown if this actually happened.
Overall, the bridge appeared to be in poor to serious condition at the time of demolition, with significant structural deterioration. The condition of this section of bridges has limited the speed on the route to 10 mph.

The author has ranked the bridge as being locally significant, due to the common design.
The photo above is an overview.

Citations

Source Type

Source

Build Date Illinois Central 1942 track profiles
Contractor Engineering News-Record Volume 43
Railroad Line History Source ICC Valuation Information, Compiled by Richard S. Steele



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