California Independent System Operator

Balancing Authority Summary Information

California Independent System Operator is ranked #7 out of 65 balancing authorities in terms of total annual electricity generation.

Balancing Authority	California Independent System Operator
States	Arizona California Nevada
Last Update	Apr 2025
Annual Generation	189.5 TWh
Power Plants	1,943
Utilities	893
Ranked #7 out of 65 in terms of net annual generation
Ranked #7 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 43.4% Solar \| 24.7% Water \| 11.7% Wind \| 11% Nuclear \| 9.7%

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Daily Net Generation for California Independent System Operator for the past 3 Years

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Scarlet Solar (CA)	EDP Renewables North America LLC	Fresno, CA	326 GWh	-	Feb 2025	Solar
Chaparral Springs	Leeward Asset Management, LLC	Rosamond, CA	446 GWh	-	Feb 2025	Solar
White Wing Solar	Leeward Asset Management, LLC	Yuma, AZ	148 GWh	-	Feb 2025	Solar
Mesa Wind Repower	Mesa Wind Repower	Whitewater, CA	71 GWh	-	Feb 2025	Wind
West Ford Flat	West Ford Flat Energy Storage	Middletown, CA	1 GWh	-	Dec 2024	Electricity used for energy storage
Proxima	Proxima Solar, LLC	Crows Landing, CA	317 GWh	-	Feb 2025	Solar
Raceway Solar & Storage	AES Clean Energy	Lancaster, CA	299 GWh	-	Feb 2025	Solar
Sandrini Solar 200	EDPR CA Solar Park LLC	Mettler, CA	52 GWh	-	Feb 2025	Solar
Paulsell	Crow Creek Solar, LLC	Crows Landing, CA	28 GWh	-	Feb 2025	Solar
Scarlet II Hybrid	EDPR Scarlet II LLC	Cantua Creek, CA	56 GWh	-	Feb 2025	Solar
Desert Quartzite	Desert Quartzite LLC	Blythe, CA	175 GWh	-	Feb 2025	Solar
Rexford Solar Farm	AES Clean Energy	Ducor, CA	31 GWh	-	Feb 2025	Solar
Mesquite Solar 4, LLC	Consolidated Edison Development Inc.	Tonopah, AZ	150 GWh	-	Feb 2025	Solar : 99.9%
McFarland B Solar and Storage	AES Clean Energy	Dateland, AZ	30 GWh	-	Feb 2025	Solar
OES Biogas Power	Organic Energy Solutions, Inc.	San Bernardino, CA	348 MWh	-	Dec 2023	Other Biomass Gas
Arica Solar	Arica Solar, LLC	Desert Center, CA	642 GWh	-	Feb 2025	Solar
Victory Pass	Victory Pass I, LLC	Desert Center, CA	555 GWh	-	Feb 2025	Solar
Sandrini Solar 100	EDPR CA Solar Park II LLC	Mettler, CA	65 GWh	-	Feb 2025	Solar
Lockhart ESS, LLC	Terra-Gen Operating Co-Solar	Hinkley, CA	24 GWh	-	Feb 2025	Electricity used for energy storage
Baldy Mesa 2_Silver Peak Hybrid	AES Clean Energy	Adelanto, CA	173 MWh	-	Jan 2025	Solar
Baldy Mesa Solar & Storage	AES Clean Energy	Adelanto, CA	58 GWh	-	Feb 2025	Solar : 99.8%
Santa Ana 1	Southern California Edison Co	Highlands, CA	6 MWh	Dec 1898	Aug 2023	Water
Alta Powerhouse	Pacific Gas & Electric Co.	Alta, CA	3 GWh	Oct 1902	Dec 2023	Water
Mill Creek 3	Southern California Edison Co	Mill Creek, CA	11 GWh	Feb 1903	Dec 2023	Water
Bishop Creek 4	Southern California Edison Co	Bishop, CA	50 GWh	Aug 1905	Dec 2023	Water
Cow Creek	Pacific Gas & Electric Co.	Millville, CA	6 GWh	Dec 1906	Mar 2023	Water
Kern River 1	Southern California Edison Co	Bakersfield, CA	167 GWh	Apr 1907	Dec 2023	Water
Deer Creek PH	Pacific Gas & Electric Co.	Nevada City, CA	12 GWh	Apr 1908	Nov 2023	Water
Bishop Creek 2	Southern California Edison Co	Bishop, CA	36 GWh	Oct 1908	Dec 2023	Water
A G Wishon	Pacific Gas & Electric Co.	North Fork, CA	16 GWh	Aug 1910	Dec 2023	Water
Lundy	Southern California Edison Co	Lee Vining, CA	11 GWh	Nov 1911	Dec 2023	Water
Bishop Creek 6	Southern California Edison Co	Bishop, CA	10 GWh	Feb 1913	Dec 2023	Water
Bishop Creek 3	Southern California Edison Co	Bishop, CA	26 GWh	May 1913	Dec 2023	Water
Drum 1	Pacific Gas & Electric Co.	Alta, CA	88 GWh	Oct 1913	Dec 2023	Water
Big Creek 1	Southern California Edison Co	Big Creek, CA	394 GWh	Oct 1913	Dec 2023	Water
Big Creek 2	Southern California Edison Co	Auberry, CA	296 GWh	Nov 1913	Dec 2023	Water
Rush Creek	Southern California Edison Co	June lake, CA	40 GWh	Sep 1916	Dec 2023	Water
Halsey	Pacific Gas & Electric Co.	Auburn, CA	7 GWh	Nov 1916	Dec 2022	Water
Wise	Pacific Gas & Electric Co.	Auburn, CA	65 GWh	Feb 1917	Dec 2023	Water
San Joaquin 2	Pacific Gas & Electric Co.	North Fork, CA	2 GWh	Aug 1917	Feb 2023	Water
Fontana	Southern California Edison Co	Rialto, CA	6 GWh	Nov 1917	Dec 2023	Water
Bishop Creek 5	Southern California Edison Co	Bishop, CA	14 GWh	May 1919	Dec 2023	Water
Kern River 3	Southern California Edison Co	Kernville, CA	185 GWh	Feb 1921	Dec 2023	Water
Caribou 1	Pacific Gas & Electric Co.	Belden, CA	198 GWh	May 1921	Dec 2023	Water
Hat Creek 1	Pacific Gas & Electric Co.	Burney, CA	23 GWh	Jul 1921	Dec 2023	Water
Big Creek 8	Southern California Edison Co	Auberry, CA	153 GWh	Jul 1921	Dec 2023	Water
Hat Creek 2	Pacific Gas & Electric Co.	Burney, CA	7 GWh	Aug 1921	Dec 2023	Water
Spring Gap	Pacific Gas & Electric Co.	Long Barn, CA	31 GWh	Aug 1921	Dec 2023	Water
Pit 1	Pacific Gas & Electric Co.	Burney, CA	195 GWh	Aug 1922	Dec 2023	Water
Big Creek 3	Southern California Edison Co	Auberry, CA	593 GWh	Aug 1923	Feb 2025	Water
El Dorado	El Dorado Irrigation District	Pollock Pines, CA	101 GWh	Dec 1923	Dec 2023	Water
Poole	Southern California Edison Co	Lee Vining, CA	36 GWh	Apr 1924	Dec 2023	Water
Pit 3	Pacific Gas & Electric Co.	Burney, CA	345 GWh	Jun 1925	Dec 2023	Water
Balch 1	Pacific Gas & Electric Co.	Balch Camp, CA	184 GWh	Jan 1927	Dec 2023	Water
Bucks Creek	Pacific Gas & Electric Co.	Storrie, CA	85 GWh	Feb 1928	Sep 2023	Water
Spaulding 1	Pacific Gas & Electric Co.	Emigrant Gap, CA	37 GWh	Apr 1928	Dec 2023	Water
Spaulding 2	Pacific Gas & Electric Co.	Emigrant Gap, CA	7 GWh	Jun 1928	Mar 2023	Water
Big Creek 2A	Southern California Edison Co	Auberry, CA	352 GWh	Jul 1928	Feb 2025	Water
Spaulding 3	Pacific Gas & Electric Co.	Emigrant Gap, CA	18 GWh	Jan 1929	Dec 2023	Water
Kaweah 2	Southern California Edison Co	Three Rivers, CA	693 MWh	Aug 1929	Dec 2023	Water
Merced Falls	Merced Irrigation District	Snelling, CA	13 GWh	Jun 1930	Oct 2023	Water
Pardee	East Bay Municipal Util Dist	Valley Springs, CA	182 GWh	Jun 1930	Dec 2023	Water
Salt Springs	Pacific Gas & Electric Co.	Pioneer, CA	201 GWh	May 1931	Dec 2023	Water
Tiger Creek	Pacific Gas & Electric Co.	Pioneer, CA	246 GWh	May 1931	Dec 2023	Water
Humboldt Sawmill Company	Mendocino Forest Products	Scotia, CA	118 GWh	Dec 1937	Feb 2025	Wood/Wood Waste Solids : 99.7%
Angels	Utica Water & Power Authority	Angels Camp, CA	7 GWh	Dec 1939	Dec 2023	Water
Phoenix	Pacific Gas & Electric Co.	Sonora, CA	7 GWh	Jan 1940	Dec 2023	Water
Narrows PH	Yuba County Water Agency	Grass Valley, CA	73 GWh	Nov 1942	Dec 2023	Water
Dutch Flat	Pacific Gas & Electric Co.	Alta, CA	112 GWh	Feb 1943	Dec 2023	Water
Pit 5	Pacific Gas & Electric Co.	Big Bend, CA	445 GWh	Mar 1944	Feb 2025	Water
Argus Cogen Plant	Searles Valley Minerals Operations Inc.	Trona, CA	260 GWh	Nov 1947	Feb 2025	Bituminous Coal : 93.4% Natural Gas : 6.6%
Electra	Pacific Gas & Electric Co.	Jackson, CA	263 GWh	May 1948	Feb 2025	Water
West Point PH	Pacific Gas & Electric Co.	Pioneer, CA	82 GWh	Oct 1948	Dec 2023	Water
Cresta	Pacific Gas & Electric Co.	Storrie, CA	122 GWh	Oct 1949	Dec 2023	Water
Rock Creek	Pacific Gas & Electric Co.	Storrie, CA	617 GWh	Feb 1950	Feb 2025	Water
Big Creek 4	Southern California Edison Co	North Fork, CA	359 GWh	May 1951	Feb 2025	Water
SJ/SC WPCP	San Jose/Santa Clara Water P C	San Jose, CA	76 GWh	Jan 1953	Feb 2025	Other Biomass Gas : 50.4% Natural Gas : 49.5%
Murphys	Utica Water & Power Authority	Murphys, CA	18 GWh	Feb 1954	Dec 2023	Water
AES Redondo Beach LLC	AES Redondo Beach LLC	Redondo Beach, CA	256 GWh	Sep 1954	Dec 2023	Natural Gas
Pit 4	Pacific Gas & Electric Co.	Big Bend, CA	374 GWh	Jun 1955	Feb 2025	Water
AES Alamitos LLC	AES Alamitos LLC	Long Beach, CA	127 GWh	Aug 1956	Oct 2024	Natural Gas
Portal	Southern California Edison Co	Lakeshore, CA	21 GWh	Nov 1956	Dec 2023	Water
Beardsley	Oakdale&South San Joaquin Irrigation D.	None, CA	83 GWh	Apr 1957	Dec 2023	Water
Donnells	Oakdale&South San Joaquin Irrigation D.	None, CA	348 GWh	May 1957	Dec 2023	Water
C&H Sugar Plant	C&H Sugar Company Inc	Crockett, CA	32 GWh	Sep 1957	Feb 2025	Purchased Steam
AES Huntington Beach LLC	AES Huntington Beach LLC	Huntington Beach, CA	76 GWh	May 1958	Sep 2024	Natural Gas
Tulloch	Oakdale&South San Joaquin Irrigation D.	Jamestown, CA	125 GWh	May 1958	Dec 2023	Water
Pebbly Beach Generating Station Hybrid	Southern California Edison Co	Avalon, CA	29 GWh	Jun 1958	Feb 2025	Distillate Fuel Oil : 94.6% Gaseous Propane : 5.4%
Poe	Pacific Gas & Electric Co.	Storrie, CA	591 GWh	Sep 1958	Oct 2024	Water
Balch 2	Pacific Gas & Electric Co.	Balch Camp, CA	490 GWh	Oct 1958	Dec 2023	Water
Caribou 2	Pacific Gas & Electric Co.	Belden, CA	353 GWh	Oct 1958	Feb 2025	Water
Butt Valley	Pacific Gas & Electric Co.	Belden, CA	147 GWh	Nov 1958	Dec 2023	Water
Haas	Pacific Gas & Electric Co.	Balch Camp, CA	439 GWh	Nov 1958	Feb 2025	Water
Mammoth Pool	Southern California Edison Co	North Fork, CA	379 GWh	Feb 1960	Feb 2025	Water
Dion R Holm	City & County of San Francisco	Groveland, CA	496 GWh	Jul 1960	Feb 2025	Water
Kings River PH	Pacific Gas & Electric Co.	Balch Camp, CA	207 GWh	Feb 1962	Dec 2023	Water
De Sabla	Pacific Gas & Electric Co.	Magalia, CA	47 GWh	Jan 1963	Dec 2023	Water
Stanislaus	Pacific Gas & Electric Co.	Vallecito, CA	334 GWh	Feb 1963	Dec 2023	Water
Kelly Ridge	South Feather Water and Power Agency	Oroville, CA	65 GWh	Aug 1963	Dec 2023	Water
Forbestown	South Feather Water and Power Agency	Forbestown, CA	155 GWh	Sep 1963	Dec 2023	Water

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#27	Arizona Public Service Company	22.6 TWh	75
#55	Arlington Valley, LLC	3.3 TWh	1
#36	Balancing Authority of Northern California	15.0 TWh	83
#48	Imperial Irrigation District	5.7 TWh	65
#33	Los Angeles Department of Water and Power	17.3 TWh	120
#22	Nevada Power Company	38.0 TWh	136
#54	New Harquahala Generating Company, LLC	3.6 TWh	1
#18	Salt River Project Agricultural Improvement and Power District	58.6 TWh	45
#58	Turlock Irrigation District	2.0 TWh	11
#41	Western Area Power Administration - Desert Southwest Region	8.4 TWh	30

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#3	Electric Reliability Council of Texas, Inc.	474.6 TWh	1,139
#5	Southwest Power Pool	296.4 TWh	762
#6	Southern Company Services, Inc. - Trans	252.8 TWh	393
#7	California Independent System Operator	189.5 TWh	1,943
#8	Tennessee Valley Authority	158.9 TWh	170
#10	Florida Power & Light Co.	148.5 TWh	159
#12	New York Independent System Operator	131.1 TWh	1,100
#13	Duke Energy Carolinas	111.3 TWh	556
#15	ISO New England	103.6 TWh	1,487
#16	Bonneville Power Administration	82.9 TWh	158