The Tilton Island Park Bridge is a foot bridge in Tilton, New Hampshire. It spans a portion of the Winnipesaukee River just east of downtown Tilton, providing access to Tilton Island Park, located on an island in the river. The bridge was manufactured by A. D. Briggs & Company and installed in 1881 by J. R. Smith. It consists of two Truesdell truss spans, which rest on granite abutments and a central granite pier. The bridge is 85 feet (26 m) in length, and 10 feet (3.0 m) wide. Its trusses are made of iron, using a patented design similar to that of Ithiel Town for wooden lattice bridges. The principal innovation in Lucius Truesdell's patent was the clamps which fix the lattice members together where they cross, providing additional rigidity, and a series of horizontal and vertical member