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18 1/2 Mile Road Bridge

18 1/2 Mile Road Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: Fall 2005

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Key Facts

Facility Carried / Feature Intersected
18 1/2 Mile Road Over I-94
Rural: Calhoun County, Michigan: United States
Construction Date and Builder / Engineer
1960 By Builder/Contractor: Holloway Construction Company and Jarvick Construction Company and Engineer/Design: Michigan State Highway Department

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
71 Feet (21.6 Meters)
Structure Length
227 Feet (69.2 Meters)
Roadway Width
24 Feet (7.32 Meters)
4 Main Span(s)
NBI Number

Historic Significance Rating (HSR)
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Bridge Documentation

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

It is expressway bridges like this that help turn a boring expressway drive into a beautiful look into historic bridge design. Curved t-beam bridges like this one were built in the late 50s and early 60s, and are among the last bridges built in Michigan to incorporate aesthetics as a major part of the design. This aesthetic detail can be seen in the railings and the elegant curved nature of the beams. The curved beams also served to increase vertical clearance on the bridge.

With a construction date of 1960, this bridge will not be old enough to be eligible for the national register of historic places until 2010. This bridge is a good example of curved t-beam construction on I-94. MDOT has recently been going around and bolting modern Armco railings to a number of these bridges. Any bridges that remain without these railings added stand out as having a greater level of historic significance.

This section of I-94 is a high priority NAFTA corridor as well as just a plain busy expressway. If MDOT were to upgrade this highway, which has a high accident and fatality rate, to three lanes, many bridges would likely be demolished. It is possible however, that these t-beams would be able to stay. Sigler Road Bridge on I-75 holds three lanes under it.


Photo Galleries and Videos: 18 1/2 Mile Road Bridge

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Maps and Links: 18 1/2 Mile Road Bridge

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