Pursuant to Section 68 of the Public Service Law, Stephentown Regulating Services LLC (SRS) (now operating as Stephentown Spindle LLC (SS)) was granted a Certificate of Public Convenience and Necessity for a 20-megawatt (MW) flywheel-based energy storage facility in 2009. It went in-service in 2010. There are 200 flywheels set within 20 pods on 5-acres that spin at high rates of speed (8,000 rpm to 16,000 rpm) storing energy as rotational energy. Each flywheel weighs 5 tons. The flywheels are energized by and discharge their energy into the New York State transmission system.