The NYSEG Seneca – Compressed Air Energy Storage System is a 150,000kW energy storage project located in Schuyler County, New York, US. The rated storage capacity of the project is 2,400,000kWh.

The electro-mechanical energy storage project uses compressed air storage as its storage technology. The project was announced in 2010.


The NYSEG Seneca – Compressed Air Energy Storage System is being developed by Iberdrola Energy Projects. The project is owned by New York State Electric & Gas (100%), a subsidiary of Avangrid Networks.

The key applications of the project are frequency regulation, electric energy time shift, electric supply reserve capacity – spinning, black start and transmission congestion relief.

Contractors involved

New York State Electric & Gas is the owner. Iberdrola Energy Projects is the developer.

Additional information

The Energy Storage System is funded by a $29,561,142.00 investment from Department of Energy, Office of Electricity – ARRA Smart Grid Demonstration Program. The plant will be build by using an existing 4.5 million cubic foot underground salt cavern in Reading, New York. It will be tied to NYSEG’s cross-state 230kV/345kV transmission system that feeds major metropolitan centers in Central New York.


All publicly-announced energy storage projects included in this analysis are drawn from GlobalData’s Power IC. The information regarding the projects are sourced through secondary information sources such as country specific power players, company news and reports, statistical organisations, regulatory body, government planning reports and their publications and is further validated through primary from various stakeholders such as power utility companies, consultants, energy associations of respective countries, government bodies and professionals from leading players in the power sector.