Gas- and Oil-Fired Plants in California
AES Alamitos
Location: California
Operator: AES Corp
Configuration: 2 X 163 MW, 2 X 333 MW, 2 X 495 MW
Operation: 1956-1966
Fuel: natural gas, oil
Boiler supplier: B&W, CE
T/G supplier: GE, WH
EPC: Bechtel
Quick facts: The plant was built and operated by Southern California Edison and sold to AES Crop per an agreement dating to Nov 1997. It occupies about 120ac along the west bank of the San Gabriel River, 2mi northeast of the entrance to Alamitos Bay. Units 3-6 are cross-compound units, Units 5&6 are supercritical. All six units have SCRs.

Photograph courtesy of www.daylife.com
Posted 27 Apr 2008

Broadway
Location: California
Operator: Pasadena Water & Power Dept
Configuration: 2 X 46 MW (ret), 1 X 72 MW
Operation: 1954-1965
Fuel: natural gas
Boiler supplier: CE, FW
T/G supplier: Allis Chalmers
EPC: Bechtel, Pacific Gas and Electric
Quick facts: Unit-3 is generally only used in the summer.

Photograph by benprks (flickr)
Posted 14 Jun 2008

Contra Costa
Location: California
Operator: NRG Energy Inc
Configuration: 5 X 100 MW, 2 X 359 MW
Operation: 1951-1964 (ret)
Fuel: natural gas, oil
Boiler supplier: CE, B&W
T/G supplier: GE, WH
EPC: Bechtel, Pacific Gas and Electric
Quick facts: Mirant (later GenOn) acquired the plant from Pacfic Gas and Electric in 1999. The company invested over $18mn in low NOx burners, SCR systems, and separated over-fire air equipment for the large sets. Units 4&5 were converted to synchronous condensers. Units 6&7 retired in May 2013 after the completion of the adjacent Marsh Landing CCGT.

Photograph by Stones 55 (flickr)
Posted 19 Apr 2007

El Segundo
Location: California
Operator: NRG Energy Inc
Configuration: 5 X 156 MW (ret), 2 X 342 MW
Operation: 1955-1965
Fuel: natural gas, oil
Boiler supplier: B&W, CE
T/G supplier: GE
EPC: Bechtel
Quick facts: El Segundo was built by Southern California Edison on a 37ac beachsidet tract between LAX and Manhattan Beach. The plant was sold to NRG in 1998.

Photograph courtesy of www.mesothel.com
Posted 3 Aug 2013

Encina (Cabrillo)
Location: California
Operator: NRG Energy Inc
Configuration: 3 X 110 MW, 1 X 290 MW, 1 X 340 MW
Operation: 1954-1978
Fuel: natural gas, oil
Boiler supplier: B&W
T/G supplier: GE, WH
EPC: Pioneer
Quick facts: In 1948, San Diego Gas & Electic Co bought 110ac alongside the Agua Hedionda Lagoon to build the Encina power station. The power plant broke ground in 1952, the same year the adjacent comunity of Carlsbad was incorporated. The power station was sold to NRG and Dynegy in May 1999 for $356mn. The main structure is 200ft high and the landmark stack is 400ft tall.

Photograph courtesy of www.carlsbadistan.com
Posted 3 Aug 2013

Hunters Point
Location: California
Operator: Pacific Gas and Electric Co
Configuration: 1 X 42 MW, 2  X 108 MW, 1 X 163 MW, 1 X 52 MW GT
Operation: 1929-1958
Fuel: natural gas, oil
Boiler supplier: B&W, CE
T/G supplier: GE
EPC: Pacific Gas and Electric
Quick facts: This was one of the first major thermal power plants in the Bay Area. Installation of a new static var compensator at Potrero power plant in Dec 2004 allowed the termination of the California ISO reliability must-run (RMR) agreements for the plant and Hunters Point 2&3 were closed shortly thereafter when their RMR contracts expired. Unit-4 was closed in May 2006.

Photograph courtesy of parody.org
Posted 10 Jun 2006

AES Huntington Beach
Location: California
Operator: AES Corp
Configuration: 2 X 218 MW, 2 X 225 MW
Operation: 1958-1961
Fuel: natural gas, oil
Boiler supplier: B&W
T/G supplier: GE, WH
EPC: Bechtel
Quick facts: The plant was built and operated by Southern California Edison on a 12ac coastal site. It was sold to AES Crop per an agreement dating to Nov 1997. All units have cross-compound steam turbines. Units 3&4 were taken out of service in 1995 and substantially rebuilt in 2001 by PMSI under a $130mn contract. The scope included boiler pressure components, new air preheaters and ducting, low-Nox burners and a SCR, plus overhauls of some piping and auxiliary and control systems.

Photograph courtesy of Powerplant Maintenance Specialists Inc
Posted 21 Jun 2009

Kern
Location: California
Operator: Pacific Gas and Electric Co
Configuration: 1 X 60 MW, 1 X 92 MW
Operation: 1948-1950 (ret)
Fuel: natural gas, oil
Boiler supplier: B&W
T/G supplier: GE
Quick facts: In 1985, PG&E deactivated the Kern plant and it was permanently closed in 1995. In 2000, PG&E began the process of selling the facility and 150ac site, entering into agreements with two different buyers, but neither effort resulted in a sale. In late 2011, PG&E began dismantling the plant and In Mar 2012, Cleveland Wrecking Co was selected for the demolition work. The boilers were imploded in Aug 2013.

Photograph courtesy of Pacific Gas and Electric Co
Posted 4 Aug 2013

Long Beach 1-4
Location: California
Operator: Southern California Edison Co
Configuration: 4 X 100 MW
Operation: 1928-??
Fuel: natural gas, oil
Boiler supplier: ??
T/G supplier: ??
Quick facts: The photo is from the UCLA Archives and shows a $10mn construction project underway at at Long Beach GS on Terminal Island. This doubled the size of the existing power plant. Uni-1 went online on 20 Jun 1928.

Photograph courtesy of latimes.com
Posted 23 Sep 2012

Mandalay
Location: California
Operator: Reliant Energy
Configuration: 2 X 218 MW
Operation: 1959
Fuel: natural gas, oil
Boiler supplier: B&W
T/G supplier: GE
EPC: Bechtel
Quick facts: This plant purchased from Southern Californa Edison Co in Apr 1998. This was one of the first conventional steam-electric plants in the USA to retrofit SCR. Cross-compound turbines.

Photograph by Joe Virnig (www.venturacountyvistas.com)
Posted 3 Mar 2007

Morro Bay
Location: California
Operator: Duke Energy North America
Configuration: 2 X 169 MW, 2  X 359 MW
Operation: 1955-1963 (ret)
Fuel: natural gas, oil
Boiler supplier: CE, B&W
T/G supplier: GE, WH
EPC: Bechtel, Pacific Gas and Electric
Quick facts: Excavation for PG&E's Morro Bay power station began in Oct 1953. The 140ac site was formerly a US Navy facility. The first two units were completed in 1955 at a cost of $44.3mn. The GE turbosets were among the largest in the USA at installation. The plant was purchased from Pacific Gas and Electric in July 1998. The stacks are 450ft tall. Morro Bay was closed on 5 Feb 2014.

Photograph by Peter Henderson and courtesy of PISCES Conservation Ltd
Posted 11 Jun 2004

Moss Landing
Location: California
Operator: Duke Energy North America
Configuration: 5 X 100 MW (ret 1994), 2 X 750 MW
Operation: 1950-1968
Fuel: natural gas
Boiler supplier: B&W
T/G supplier: GE, WH
EPC: Stone & Webster, Pacific Gas and Electric
Quick facts: Plant purchased from Pacific Gas and Electric in July 1998. Units 6&7 are supercritical cross-compound units. Two 530-MW combined-cycle blocks were installed in 2002.

Photograph by Declan McCullagh
Posted 6 Jan 2002

Ormond Beach
Location: California
Operator: Reliant Energy
Configuration: 2 X 806 MW
Operation: 1971-1973
Fuel: natural gas, oil
Boiler supplier: FW
T/G supplier: GE
EPC: Bechtel
Quick facts: Plant purchased from Southern Californa Edison Co in Apr 1998. The supercritical units were retrofit with a Joy SCR system.

Photograph by Joe Virnig (www.venturacountyvistas.com)
Posted 3 Mar 2007

Potrero-3
Location: California
Operator: Mirant Corp
Configuration: 1 X 218 MW
Operation: 1965 (ret 2010)
Fuel: natural gas, oil
Boiler supplier: RS
T/G supplier: WH
EPC: Pacific Gas and Electric
Quick facts: After taking ownership of Potrero in 1999, Mirant (later GenOn)invested $26mn to reduce NOx emissions at the plant and also cleaned and closed the plant's waste ponds. As part of an agreement with the City and County of San Francisco, the company agreed to close the unit permanently on 31 Dec 2010. The stack is 303ft tall.

Photograph and copyright by Tristan Savatier (www.loupiote.com)
Posted 28 Jan 2007

AES Redondo
Location: California
Operator: AES Corp
Configuration: 4 X 69 MW (ret), 2 X 156 MW, 2 X 495 MW
Operation: 1948-1967
Fuel: natural gas
Boiler supplier: B&W
T/G supplier: GE, WH
EPC: S&W, Bechtel
Quick facts: The first power station at this site went online in 1907 and was said to be the lagest steam-electric plant west of Chicago. It was built for Henry Huntington's Pacific Light and Power Co to provide electricity to Huntington’s Los Angeles Railway Co. PLPC was bought by Southern California Edison in 1917 and the original Redondo plant was shutdown and abandoned in 1933. In 1946, SCE announced plans for a new $38mn plant and this was built by Stone & Webster with the frst unit online on 26 Feb 1948. A second phase was added in 1956 and the supercritical, cross-compound Units 7&8 completed in 1967/68. In 1997, the plant was one of three SCE coastal sites sold to AES Corp. Plans are in hand to replace the steam plant with CCGT blocks. On the shoreward plant facade is a 586ft long, 95ft high mural completed in Jun 1991 by local artist Wyland. The mural, one of a number completed by the artist, was restored in 2011.

Photograph by Curtis Bergesen
Re-posted 4 May 2014

Scattergood
Location: California
Operator: Los Angeles Dept of Water and Power
Configuration: 2 X 163 MW, 1  X 497 MW
Operation: 1958-1974
Fuel: natural gas, digester gas, oil
Boiler supplier: CE, B&W
T/G supplier: GE, BBC
EPC: Bechtel, Pacific Gas and Electric
Quick facts: Scattergood is adjacent to the Hyperion Wastewater Treamement Plant, the largest in the city, and the El Serundo Refinery. In 1995, the Department of Public Works and LADWP entered into a landmark 20yr agreement whereby DPW agreed to provide digester biogas to Scattergood Steam The volume is about 8mn cubic feet per day. Unit-3 is supercritical.

Photograph by BillGraf (flickr)
Posted 23 Sep 2012

Seal Beach
Location: California
Operator: Los Angeles Dept of Water and Power
Configuration: 75 MW
Operation: 1925-1928
Fuel: natural gas, oil
Boiler supplier: ??
T/G supplier: ??
EPC: Los Angeles Gas and Electric Corp
Quick facts: Ground was broken for Seal Beach on 1 Jul 1925. The original 375ft stack was damaged by an earthquake in Mar 1933 and replaced by this much shorter stack. DWP bought LA Gas and Electric in 1936. The photo is ca 1940 and the plant was closed in 1951.

Photograph courtesy of waterandpower.org
Posted 23 Sep 2012

South Bay
Location: California
Operator: Dynegy South Bay
Configuration: 2 X 136 MW, 1  X 202 MW, 1 X 240 MW
Operation: 1960-1971 (ret)
Fuel: natural gas, oil
Boiler supplier: CE, B&W, RS
T/G supplier: GE, WH
Quick facts: Acquired by the Unified Port of San Diego from San Diego Electric & Gas in 1999. Operated for a time under long-term lease by Duke Energy Americas. DEA's interests acquired by LS Power Group in May 2006. Planned 620-MW CCGT replacement plant cancelled in Mar 2007. Site acquired by Dynegy in Apr 2007. License expired on 21 Dec 2010, at which time the plant was retired.

Photograph courtesy of Duke Energy
Posted 26 Jan 2005

Abbreviations

Data: industcards, Platts UDI World Electric Power Plants Data Base

Updated 21-Apr-2017

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