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The Calaveras Power Station is a series of
power plant A power station, also referred to as a power plant and sometimes generating station or generating plant, is an industrial facility for the electricity generation, generation of electric power. Power stations are generally connected to an electr ...
s located southeast of
San Antonio San Antonio ( ; Spanish for " Saint Anthony") is a city in the U.S. state of Texas and the most populous city in Greater San Antonio. San Antonio is the third-largest metropolitan area in Texas and the 24th-largest metropolitan area in the ...
, in
Bexar County, Texas Bexar County ( or ; ) is a County (United States), county in the U.S. state of Texas. It is in South Texas and its county seat is San Antonio. As of the 2020 United States census, 2020 census, the population was 2,009,324, making it the st ...
, near Calaveras Lake. These plants include the J.T. Deely Power Plant, the O.W. Sommers Power Plant, and the J.K. Spruce Power Plant. They are operated by
CPS Energy CPS Energy (formerly City Public Service Board of San Antonio) is the municipal electric utility serving the city of San Antonio, Texas. Acquired by the city in 1942, CPS Energy serves over 840,750 electricity customers and more than 352,585 natu ...
.


J.T. Deely Power Plant

J.T. Deely Power Plant was a two unit, 871 megawatt (MW) coal power plant located at the Calaveras Power Station. They were operated by CPS Energy and ran from 1977 to 2018.


O.W. Sommers Power Plant

O.W. Sommers is a two unit
natural gas power plant A gas-fired power plant, sometimes referred to as gas-fired power station, natural gas power plant, or methane gas power plant, is a thermal power station that burns natural gas to generate electricity. Gas-fired power plants generate almost a ...
with a combined capacity of 892 MW. Unit 1 began commercial generation in 1972 and Unit 2 began in 1974. The plant is named after former CPS General Manager, Otto W. Sommers.


J.K. Spruce Power Plant

J.K. Spruce is a two unit coal power plant with a combined capacity of 1,300 MW. Construction of Unit 1 was completed in 1992. The plant is named after former CPS General Manager, Jack Spruce. A LO-NOx burner was installed to Unit 1 in 1999 to reduce
nitrogen oxide Nitrogen oxide may refer to a binary compound of oxygen and nitrogen, or a mixture of such compounds: Charge-neutral *Nitric oxide (NO), nitrogen(II) oxide, or nitrogen monoxide * Nitrogen dioxide (), nitrogen(IV) oxide * Nitrogen trioxide (), o ...
() emissions. In order to meet future electricity demand, CPS Energy commissioned Unit 2 in 2005 and was completed in 2010 at a cost of $1 billion. The second unit constructed included modern pollution controls such as the installation of a SCR system and
flue-gas desulfurization Flue-gas desulfurization (FGD) is a set of technologies used to remove sulfur dioxide () from exhaust flue gases of fossil-fuel power plants, and from the emissions of other sulfur oxide emitting processes such as waste incineration, petroleum ...
(FGD) system which removed and
sulfur dioxide Sulfur dioxide (IUPAC-recommended spelling) or sulphur dioxide (traditional Commonwealth English) is the chemical compound with the formula . It is a colorless gas with a pungent smell that is responsible for the odor of burnt matches. It is r ...
() respectively. According to a report by Synapse Energy Economics, Spruce operated at an estimated loss of $135 million from 2015 to 2016 as depressed natural gas prices made coal uneconomical to operate.
Moody's Moody's Ratings, previously and still legally known as Moody's Investors Service and often referred to as Moody's, is the bond credit rating business of Moody's Corporation, representing the company's traditional line of business and its histo ...
revealed in a 2018 report that a generator issue at Spruce's Unit 2 has made the unit run at less than half its capacity thereby raising the plant's expenses. In January 2023, CPS Energy's board of trustees voted to shut down Unit 1 and convert Unit 2 to natural gas by 2028, thereby ending the use of coal-fired power generation to power San Antonio's power grid.


See also

*
List of power stations in Texas This is a list of electricity-generating power stations in the U.S. state of Texas, sorted by type and name. In 2022, Texas had a total summer capacity of 148,900 MW through all of its power plants, and a net generation of 525,562 GWh ...


References

{{reflist Energy infrastructure completed in 1972 Energy infrastructure completed in 1974 Energy infrastructure completed in 1977 Energy infrastructure completed in 1978 Energy infrastructure completed in 1992 Energy infrastructure completed in 2010 Buildings and structures in Bexar County, Texas Coal-fired power stations in Texas Natural gas-fired power stations in Texas CPS Energy