Birmingham Bridge, also known as Huntingdon County Bridge No. 15 and Blair County Bridge No. 48, is a historic Pratt trussbridge spanning the Little Juniata River and located at Tyrone Township, Blair County and Warriors Mark Township, Huntingdon County, Pennsylvania. It was built by the Pennsylvania Bridge Co. in 1898. It measures 137 ft (42 m) in length and has a 14.7-foot-wide (4.5 m) bridge deck. It is the only means of access to two dwellings on the Blair County side of the river.[2]