Description Manayunk's development is greatly attributed to its canal, since it was a stable waterway that provided transportation and water for the town's mills and enabled the shipment of goods within a 108-mile span of navigable waters. The Schuylkill Navigation Company was fully incorporated in 1815 to provide safe transportation of goods along the Schuylkill River. At the time, horses pulling carts of goods for long distances on dirt roads did not meet the demands of industry, so the Company began its work in 1817 from Fairmount Dam in Philadelphia (which had already been built as part of Philadelphia's drinking water system). The system would include; 51 miles of canals, 114 locks and a tunnel and 32 dams ranging in height of 3 to 23 feet, overcoming a total fall of 610 feet. The Manayunk canal was completed in 1819 along with Flat Rock Dam (since Manayunk at the time was called 'Flat Rock').