What century were the Leiper Canal and Duluth Ship Canal built?
Duluth Ship Canal The Duluth Ship Canal is an artificial channel cut through Minnesota Point, providing direct access to Duluth harbor from Lake Superior. Begun privately in 1871, it was put under federal supervision and maintenance several years later. It is still an important component of the harbor facilities.
Danziger Bridge The Danziger Bridge is a vertical lift bridge named after a New Orleans lawyer and businessman, which carries seven vehicular lanes of U.S. Route 90 (Chef Menteur Highway) across the Industrial Canal in New Orleans, Louisiana. It was built to replace the old Danziger Bridge, a draw bridge constructed in 1931–1932. The current Danziger Bridge was constructed on the south side of the old bridge between 1983 and 1987, officially opening in February 1988, becoming the widest lift bridge in the world. Most marine traffic is accommodated in the down position.