Erie Extension Canal
West Fallowfield Township, Crawford County, Pennsylvania
Marker Inscription
Cut off from the rest of Pymatuning Swamp by a 3-mile bank, this became the 600-acre "Pymatuning Reservoir" of the canal, which lay at its western edge. Begun by the State, 1838; finished by the Erie Canal Co., 1843-44.
Erected by Pennsylvania Historical and Museum Commission
The Story
To keep the Erie Extension Canal supplied with water, builders diked off part of the great Pymatuning Swamp with a three-mile bank, creating a 600-acre reservoir along the canal's western edge. The state began the work in 1838 and the Erie Canal Company finished it in 1843–44, an early exercise in the large-scale water management that canal engineering demanded. The reservoir was one link in a system that moved goods across northwestern Pennsylvania for nearly three decades.
Why it matters
Engineered reservoirs like this one show how the canal age reshaped the American landscape itself to serve commerce, a precursor to the era of dams and public works.
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Nearby & related markers
Erie Extension Canal
Sadsbury Township, PA · est. 1948
Beside the later railroad, the faint bed of the Erie Extension Canal still traces where boats once floated through this corner of Crawford County. Nearby the Shenango Line running up from New Castle joined the Conneaut Line coming down from Erie, part of a waterway that tied Lake Erie to the Ohio country. In use from 1844 to 1871, the canal was eventually eclipsed by the very railroads that now run alongside its remains.
Erie Extension Canal
Sadsbury Township, PA · est. 1948
This channel was part of the ambitious Erie Extension Canal, which in the 1840s stitched northwestern Pennsylvania into the era's booming inland-waterway network. Engineers raised Conneaut Lake nine feet above its natural level so it could feed water into the canal at its highest point, where the Shenango and Conneaut lines met. The whole system carried boats and cargo from 1844 until 1871, when railroads finally rendered it obsolete.
French Creek Feeder
Union Township, PA · est. 1948
Built between 1827 and 1834 and repaired in 1841, this feeder canal drew water from French Creek and carried it to Conneaut Lake, the great reservoir that supplied the Erie Extension Canal. Feeders like this were the unseen plumbing of the canal age, keeping the main navigation channels deep enough to float loaded boats. The larger system it served linked Erie and New Castle and operated from 1844 to 1871.
Erie Extension Canal
West Salem Township, PA · est. 1947
In the canal-building fever of the early nineteenth century, Pennsylvania cut the Erie Extension to link its interior with Lake Erie. The Shenango Line, running from New Castle toward Conneaut Lake, formally opened to Greenville in August 1840. A private company ran the waterway from 1844 until 1870, but railroads soon made it obsolete and it closed in 1871—its channel still traceable across the landscape today.