| Key Facts |
| Bridge Name | Facility Carried / Feature Intersected | Location | Structure Type | Construction Date / Builder or Contractor |
| Ehrmentraut Farm Bridge | Farm Trail Over Black Trail | Rural: Monroe County, New York | Metal Bowstring Pony Truss (Whipple Arch), Stationary | 1859 By: Squire Whipple Patent |
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.
