The International Railway Bridge is a two-span swing bridge carrying the Stamford Subdivision of the Canadian National Railway across the Niagara River between Fort Erie, Ontario, Canada, and Buffalo, New York, United States.

The portion between these was originally built on a trestle, and was filled to form an embankment soon after the bridge opened.

The former CN Rail Fort Erie Yard for interchange was closed with only the Fidel shop remains as Niagara Railway Museum.

As well as being a serious bottleneck to both freight and passenger traffic, this crossing was often dangerous as the current in this area is swift, and ice is a problem several months of the year.

The Dominion of Canada and the New York State Legislature drafted an agreement for construction of the bridge.

It is also located at the east end of Lake Erie, and during the spring, large blocks of ice often flow down the river, threatening to destroy any bridge placed in its path.

In the 1860s, the American Civil War, and rebuilding afterwards, consumed much of the resources of the United States and further delayed construction.

Prior to the construction of the eight stone piers, it was necessary to remove up to ten feet (three meters) of gravel from the bottom of the river.

Upon completion, the pontoons were filled with water to lower the bridge span precisely into place on the piers.

One was located on the American side of the main channel of the river and provided a navigable opening of 160 feet (49 m) width.

The second was located over the Black Rock Harbor and provided a navigable opening of 90 feet (27 m) width.