Moses–Saunders Power Dam

dam, Canada-United States

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July 1, 2026

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The Moses-Saunders Power Dam is a hydroelectric dam located on the St. Lawrence River, near Cornwall, Ontario, and Massena, New York. It is a joint project between Ontario Hydro and the New York Power Authority, with the Canada-United States border running through its center.1

Completed in 1959, the dam is a significant component of the St. Lawrence Seaway System, a joint Canada-United States project that created a navigable deep waterway from the Atlantic Ocean to the Great Lakes. The dam harnesses the power of the St. Lawrence River, contributing to hydroelectric power generation for both regions. It is one of the largest civil engineering feats undertaken for the seaway project, which aimed to open North America's interior to ocean-going vessels.21

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turbine
Axial-flow machines
…32 propeller turbines in the Moses–Saunders Power Dam on the St. Lawrence River between New York and Ontario—16 operated by the United States and 16 by Canada, with each turbine rated at 50,000 kilowatts. With such large plants it is possible to run each turbine at or near its most…
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…32 propeller turbines in the Moses–Saunders Power Dam on the St. Lawrence River between New York and Ontario—16 operated by the United States and 16 by Canada, with each turbine rated at 50,000 kilowatts. With such large plants it is possible to run each turbine at or near its most…
Read More