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Ehrmentraut Farm Bridge

   


Ehrmentraut Farm Bridge

Primary Photographer(s): Nathan Holth

Bridge Documented: May 26, 2007
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Key Facts

Facility Carried / Feature Intersected
Farm Trail Over Black Creek
Location
Rural: Monroe County, New York
Construction Date and Builder / Engineer
1859 By Builder/Contractor: John Hutchinson of Troy, New York and Engineer/Design: Squire Whipple

Technical Facts

Rehabilitation Date
Not Available or Not Applicable
Main Span Length
Not Available
Structure Length
Not Available
Roadway Width
Not Available
Spans
1 Main Span(s)
NBI Number
Not Applicable

Historic Significance Rating (HSR)

Bridge Documentation

View Historic American Engineering Record (HAER) Documentation For This Bridge

With an 1859 construction date, this bridge is among the oldest and rarest bridges in the entire country. This bridge is an extremely rare example of a Whipple Arch, which was the first of the bowstring truss bridges designs, and was designed and patented by famed engineer Squire Whipple himself. These Whipple Arch bridges feature a unique top chord that is wider at the base than it is at the top.

This bridge has a long history, as one might expect from a bridge that is nearly 150 years old. The bridge was originally constructed in 1859 to cross the Erie Canal in Brockport, New York. The bridge was a wider bridge than it is today, since in Brockport it was composed of three truss webs, rather than the two seen today. In other words, it was a wider bridge that was divided into two halves by a center truss/arch, like the Halsted Street Bridge in Chicago. The bridge remained in use in Brockport until around 1880, when it was relocated to a crossing east of Brockport. It was during this move that the bridge was changed into the two truss/arch design seen on the bridge today.  The bridge remained in this location until around 1910 when it was acquired by Ehrmentraut and relocated to its current location.

The bridge has remained in its current location with little alteration or major maintenance. Because it has had no real traffic on it, and also because it is composed of cast and wrought iron, it has not deteriorated over the years. It is truly an amazing and fantastic bridge that has stood the test of time.

Note that some sources incorrectly spell the name of this bridge. "Ehrmentraut" is the correct spelling, any others are incorrect.

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