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27 Mile Road Bridge

   


27 Mile Road Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: Spring 2007
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Key Facts

Facility Carried / Feature Intersected
27 Mile Road Over I-94
Location
Rural: Calhoun County, Michigan
Construction Date and Builder / Engineer
1960 By Builder/Contractor: Holloway Construction Company and E. C. Nolan and Son of Detroit, Michigan and Engineer/Design: Michigan State Highway Department

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
113 Feet (34.4 Meters)
Structure Length
360 Feet (109.7 Meters)
Roadway Width
26 Feet (7.9 Meters)
Spans
4 Main Span(s)
NBI Number
13113083000S100

Historic Significance Rating (HSR)

Bridge Documentation

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

The curved t-beam is a historic structure type as it utilizes a design no longer applied in modern bridge engineering, and also are among the last bridges to be built with attention paid to aesthetic railings and superstructure. However, particularly on I-94, there are a number of this structure type remaining, and as such it makes sense to eliminate some from inclusion in a historic bridge inventory or this website. In most cases, this website only includes curved t-beams that retain unmodified original railings. The attractive railings, a standard of the period, play a major role in defining the appearance of this structure type. Also, very few curved t-beams retain unmodified original railings, making those that retain them stand out of the crowd. However, the 27 Mile Road Bridge is a bridge that has those railings, but modern Armco railings have been bolted on in front of them. This is a process that MDOT has been doing slowly to the remaining curved t-beams with unmodified railings. Despite these modifications, the 27 Mile Road Bridge still merits inclusion because of its heavy skew, approximately 45 degrees. As such, the beams are notably longer and deeper. Compare this bridge to the 23 Mile Road Bridge. In addition, the bridge has an interesting appearance that is associated with the illusions that are created by the skew as the eye looks at the shape of the arch from certain angles. Most importantly, the bridge is significant as a longer, skewed example of this structure type. Even with modified railings, this bridge remains an important part of Michigan's transportation heritage.

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Photos and Videos: 27 Mile Road Bridge

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