Mystic Generating Station Units 8 & 9 in Massachusetts were retired on May 31, 2024, following 21 years of distinguished service, Constellation Energy said on May 31.
The highly efficient combined cycle units provided over 1,400 megawatts of capacity at a strategic location of the electric grid just outside of Boston in Everett.
Mystic Units 8 & 9, fueled by natural gas supplied by imported LNG at the nearby Everett Marine Terminal, eventually became uneconomic and were scheduled to retire in May 2022-- but the units were retained by ISO New England for two additional years through a cost of service agreement because they provided unique fuel security benefits to New England, Constellation Energy said.
Constellation is currently evaluating potential future uses of the 26-acre Mystic Units 8 & 9 site and it sold the 45-acre Mystic Units 1-7 site to Wynn Resorts in 2023.
