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27 Mile Road Bridge

   


27 Mile Road Bridge

Primary Photographer(s): Nathan Holth and Rick McOmber

Bridge Documented: July 22, 2004 - February 26, 2012
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Key Facts

Facility Carried / Feature Intersected
27 Mile Road Over North Branch Clinton River
Location
Rural: Macomb County, Michigan
Construction Date and Builder / Engineer
By Builder/Contractor: Unknown

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
57.7 Feet (17.6 Meters)
Structure Length
58.7 Feet (17.9 Meters)
Roadway Width
13.5 Feet (4.1 Meters)
Spans
1 Main Span(s)
NBI Number
50310H00001B010

Historic Significance Rating (HSR)

Bridge Documentation

This Bridge No Longer Exists!

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

This bridge was demolished by the Macomb County Road Commission ca. 2013-2014!

The Michigan Historic Bridge Inventory gives a date of 1910 for the construction of this bridge. However, the bridge has steel brands that read "Jones and Laughlins." The "s" in Laughlins indicates steel dating to before 1905. The 1910 date is likely a "default" date used in some database when the date was unknown. The bridge may be a ca. 1900 bridge, but most likely not date to before 1890, since it displays a standardization that was less common in the 1880s.

The 27 Mile Bridge is a traditionally designed Pratt pony truss, but is nevertheless very interesting. V-lacing is present on the vertical members of the bridge. The connections are pinned. The bottom chord is nearly completely gone, either from deterioration, or because it was cut off in some areas. However, what remains suggests it was compose of paired channels, which is unusual since eyebars would normally be expected on a pin-connected truss bridge.

The condition of this bridge was very similar to the nearby 28 Mile Bridge, only a bit worse. The 27 Mile Bridge had decayed severely, so bad that some actual parts were missing. Other parts were barely holding together by very small amounts of steel. This bridge appeared to have been retrofitted  long ago, with the addition of large i-beams below the original i-beam floor beams below the bridge, combined with an unusual system of rods that run under the whole bridge and act as post-tension rods, today doing nearly all the work of holding the bridge up. Parts of the deck were missing in spots.

By 2014, this bridge had been demolished. Nothing of the bridge except some crumbled pieces of the concrete deck remained along the banks of the river. A photo of the site after bridge demolition is shown below.

Photo Credit: Ken Beaupre

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Photos and Videos: 27 Mile Road Bridge

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Structure Overview
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A collection of overview photos that show the bridge as a whole and general areas of the bridge. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution.
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Structure Details
Original / Full Size Photos
A collection of detail photos that document the parts, construction, and condition of the bridge. For the best visual immersion and full detail, or for use as a desktop background, this gallery presents the photos for this bridge in the original digital camera resolution.
View Photo Gallery
Structure Overview
Mobile Optimized Gallery
A collection of overview photos that show the bridge as a whole and general areas of the bridge. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem (dial-up) users, or those who do not wish to wait for the longer download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
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View Photo Gallery
Structure Details
Mobile Optimized Gallery
A collection of detail photos that document the parts, construction, and condition of the bridge. View the photos for this bridge in a reduced size which is useful for mobile/smartphone users, modem (dial-up) users, or those who do not wish to wait for the longer download times of the full-size photos. Alternatively, view this photo gallery using a popup slideshow viewer (great for mobile users) by clicking the link below.
Browse Gallery With Popup Viewer

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