Hydroelectric power has long been a dependable component of Allegheny’s diverse energy resource mix. Allegheny draws hydroelectricity from two primary sources: the Raystown branch of the Juniata River in Huntingdon County and from the Niagara and St. Lawrence rivers in New York.
The Raystown Hydroelectric Plant (Raystown) — a two-unit, 21-MW, run-of-river hydropower facility in Huntingdon County — has delivered decades of reliable energy that’s helped stabilize costs for member cooperatives and strengthen grid resilience. Wholly owned by Allegheny, Raystown operates in close partnership with the Baltimore District of the U.S. Army Corps of Engineers, which controls water releases from Raystown Lake.
In 2006, the Low Impact Hydropower Institute (LIHI) certified Raystown as a low-impact hydroelectric facility, making Raystown the first hydro plant in Pennsylvania to earn this distinction for environmental stewardship. Raystown, which was recertified by LIHI in 2015, is one of only four facilities certified by the institute in Pennsylvania.
In 2009, Raystown was recognized as a Pennsylvania Tier I renewable generation resource by the Commonwealth’s Alternative Energy Portfolio Standards Program Administrator. The certification as a Tier I resource allows Allegheny to market renewable energy certificates generated by the plant, which helps fund the Renewable Energy Assistance Program.
Raystown generated approximately 81.2 million kWh in 2025, equating to 2.3% of Allegheny members’ requirements for the year.
Allegheny’s hydroelectric portfolio also includes long-term contracts with the New York Power Authority (NYPA). Since 1966, cooperative members have benefited from energy sourced from one of the most dependable hydroelectric systems in the country, reducing the need to secure alternative — and more costly — generation. In 2025, hydroelectric energy from NYPA produced 6.3% of electricity used by rural electric cooperatives in Pennsylvania and New Jersey.