Which canal, the Conewago Canal or the Orleans Canal is longer ?
Conewago Canal The Conewago Canal, on the west bank of the Susquehanna River below York Haven, Pennsylvania, 11 mi south of Harrisburg in York County, enabled late 18th and early 19th century rivercraft to safely bypass rapids at Conewago Falls. Work on the canal of less than 1 mi began in 1793 and was completed in 1797. Robert Morris, a Philadelphia financier, organized the project, which was carried out by chief engineer James Brindley, the nephew of a well-known British engineer of the same name. Two lift locks overcame 19 ft of elevation between the ends of the canal, and a guard lock blocked unwanted water, particularly during floods. Cargo could go upstream as well as down. A boat going upriver could navigate the canal in 37 minutes compared to the whole day it would take 30 or 40 men to pull it upriver along the bank. York Haven is at .
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.