which is located further east, The Susquehanna and Tidewater Canal or the Portage Canal?
Portage Canal The Portage Canal was built to connect the Fox River and Wisconsin River at Portage, Wisconsin along the Fox-Wisconsin Waterway. For a time, it completed a route from the north Atlantic Ocean, through the St. Lawrence Seaway and down the Mississippi River to the Gulf of Mexico, and back to the Atlantic.
Safe Harbor Trestle The Safe Harbor Trestle also known as the Safe Harbor Bridge, Port Road Bridge and the Enola Low Grade Line (A&S Railroad) Steel Trestle is a steel deck truss trestle that spans the Conestoga River at Safe Harbor, Pennsylvania near the Susquehanna River for the Port Road Branch and the former Columbia and Port Deposit Railroad along the Susquehanna River. It was built in 1905 for the Atglen and Susquehanna Branch (A&S), also known as the "Low Grade Branch", of the Pennsylvania Railroad (PRR).