High Quality Content by WIKIPEDIA articles! The Walnut Street Bridge also known as The People`s Bridge, is a truss bridge that spans the Susquehanna River in Harrisburg, Pennsylvania. Built by the Phoenix Bridge Company in 1890, it is the oldest remaining bridge connecting Harrisburg`s downtown and Riverfront Park with City Island. Since flooding in 1996 collapsed sections of the western span, it no longer connects to the West Shore.