made it harder for rafts, which depended on river currents and were too big for the locks. Large boats also had trouble with the locks, and the creek often lacked sufficient water to carry them. In 1837, high water caused severe damage to the short-lived system, which was allowed to decline. Pymatuning Swamp The canal passed along a causeway of through what later became Pymatuning State Park at Hartstown, Pennsylvania. The causeway was built through Pymatuning Swamp by the Erie Canal Company, effectively forming the of Pymatuning Reservoir west of the canal. Points of interest See also List of canals in the United States Nicholson House and Inn References External links American Folklife Center, Library of Congress USGS topographical map at Conneaut Lake from topoquest Pennsylvania Canal Society American Canal Society National Canal Museum Transportation buildings and structures in Beaver County, Pennsylvania Transportation buildings and structures in Lawrence County, Pennsylvania Transportation buildings and structures in Mercer County, Pennsylvania Transportation buildings and structures in Crawford County, Pennsylvania Transportation buildings and structures in Erie County, Pennsylvania Canals in Pennsylvania Canals opened in 1844