The South Hadley Canal was a canal along the Connecticut River in South Hadley, Massachusetts. It is said to be the earliest navigable canal in the United States, with operation commencing in 1795. It has been listed on the National Register of Historic Places as the South Hadley Canal Historic District.The canal dates to February 1792, when leading citizens of western Massachusetts proposed to build a canal around the Great Falls at South Hadley, a 53ft drop in the Connecticut River that blocked boat transport. At that time, all cargo needed to be unloaded for 2.5mi of land transport around the falls, driving river transport cost for a bushel of wheat from Northampton, Massachusetts to Windsor, Connecticut to more than double its transport costs by sea from Hartford to Boston. John Hancock, then Governor of Massachusetts, signed the charter which incorporated the Proprietors of the Locks and Canals on the Connecticut River. Their corporate seal bore the motto "SIC TRANSIT - Public & Private Good".Funds were raised both locally and internationally, with four Dutch investment houses owning slightly over 50% of the stock. The canal was built by some 240 local workers. In April 1795 it opened to commercial traffic. (Nearby Turners Falls Canal opened three years later.) First year revenue came to $3,109 at 75 cents per ton. By 1816 tolls had grown to over $16,000. In 1826 the Barnet, the first steamboat to operate on the Connecticut River, passed through the South Hadley Canal on its way to Vermont. However, by 1843 competing railroads had begun to erode income, and the canal closed as uneconomical in 1862.
