O W Sommers Power Plant

Hidden amidst the industrial landscape of San Antonio, the O W Sommers Power Plant hums with a quiet power. It’s a place most people overlook, but it holds a fascinating story. The O W Sommers Power Plant isn’t just a collection of turbines and pipes. It’s a vital piece of San Antonio’s history, a testament to the city’s growth and its evolving relationship with energy. Built in 1972, the O W Sommers Power Plant began its life burning natural gas, a cleaner alternative to coal. Two units, each capable of generating a substantial 446 megawatts of electricity, make up the heart of the plant. This combined output of 892 megawatts powers countless homes and businesses across San Antonio. The plant is owned and operated by the City of San Antonio itself, making it a truly public service. Interestingly, the O W Sommers Power Plant shares its location with two other power plants: the J. K. Spruce Power Plant and the now-decommissioned J.T. Deely Power Plant, all situated on a peninsula jutting into Calaveras Lake. This artificial lake, created in the late 1960s, serves a crucial purpose. It provides the cooling water necessary for the power plants’ operation. The water in Calaveras Lake comes from a surprising source: treated wastewater from the San Antonio River. This innovative approach demonstrates the city’s commitment to resourcefulness. While the O W Sommers Power Plant continues to provide reliable energy, the future holds a planned retirement for its two units. Unit 1 is scheduled to go offline in 2027, followed by Unit 2 in 2029. As technology advances and energy needs change, the O W Sommers Power Plant stands as a symbol of San Antonio’s past, present, and future energy landscape.