Midcontinent Independent System Operator, Inc.

Balancing Authority Summary Information

Midcontinent Independent System Operator, Inc. is ranked #2 out of 65 balancing authorities in terms of total annual electricity generation.

Balancing Authority	Midcontinent Independent System Operator, Inc.
States	Arkansas Illinois Indiana Iowa Kentucky Louisiana Michigan Minnesota Mississippi Missouri Montana North Dakota South Dakota Texas Wisconsin
Last Update	Nov 2025
Annual Generation	655.1 TWh
Power Plants	2,831
Utilities	1,296
Ranked #2 out of 65 in terms of net annual generation
Ranked #2 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 35.7% Coal \| 29% Wind \| 14.9% Nuclear \| 13.9% Solar \| 4.5% Water \| 1.5% Other Fuel \| 0.6%

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Daily Net Generation for Midcontinent Independent System Operator, Inc. for the past 3 Years

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Quartz Solar, LLC	Quartz Solar, LLC	Wynne, AR	209 GWh	-	Sep 2025	Solar
Purdue University	Purdue University	West Lafayette, IN	84 GWh	Dec 1968	Sep 2025	Natural Gas : 90.8% Bituminous Coal : 9.2%
Prosperity Wind	Prosperity Wind, LLC	Deland, IL	384 GWh	-	Sep 2025	Wind
Syncarpha Prinsburg CSG (Ledeboer)	Prinsburg CSG I, LLC	Prinsburg, MN	2 GWh	Nov 2018	Dec 2024	Solar
Princeton (MN)	Princeton Public Utils Comm	Princeton, MN	134 MWh	Aug 1953	Dec 2024	Distillate Fuel Oil
Primient	Primary Products Ingredients Americas, LLC d/b/a Primient	Lafayette, IN	406 GWh	May 2021	Dec 2024	Natural Gas
Primient Decatur Plant Cogen	Primary Products Ingredients Americas, LLC	Decatur, IL	254 GWh	Dec 1988	Dec 2024	Natural Gas
Portside Energy	Primary Energy Recycling Holdings, LLC	Portage, IN	256 GWh	Aug 1997	Dec 2024	Natural Gas
Preston (MN)	Preston Public Utilities Comm	Preston, MN	163 MWh	Dec 1948	Dec 2024	Distillate Fuel Oil : 62.3% Natural Gas : 37.7%
Preston Garden (CSG)	Preston Garden LLC	Franklin, MN	785 MWh	Jul 2024	Dec 2024	Solar
Prescott Wind Farm	Prescott Wind Energy LLC	Prescott, IA	144 GWh	Aug 2024	Sep 2025	Wind
Prawer Project CSG	Prawer Community Solar LLC	Clear Lake, MN	2 GWh	Dec 2019	Dec 2024	Solar
Prairie State Solar Project	Prairie State Solar, LLC	Swanwick Township, IL	231 GWh	Jun 2021	Sep 2025	Solar
Prairie State Generating Station	Prairie State Generating Co LLC	Marissa, IL	11 TWh	May 2012	Sep 2025	Bituminous Coal : 99.8%
Alsey	Prairie Power, Inc	Alsey, IL	39 GWh	May 1999	Dec 2024	Natural Gas
Pearl Station	Prairie Power, Inc	Pearl, IL	161 MWh	May 1973	Dec 2024	Distillate Fuel Oil
Prairie Mist Solar	Prairie Mist Solar Project, LLC	Montrose, AR	225 GWh	Aug 2024	Sep 2025	Solar
Portage Solar Plant	Portage Solar Plant	Portage, WI	23 GWh	May 2023	Dec 2024	Solar
Point Beach Solar	Point Beach Solar	Two Creeks, WI	204 GWh	Aug 2021	Sep 2025	Solar
POET Biorefining-Hanlontown, LLC	POET Biorefining-Hanlontown, LLC	Hanlontown, IA	12 GWh	Dec 2018	Dec 2024	Natural Gas
POET Biorefining - Chancellor	POET Biorefining- Chancellor	Chancellor, SD	28 GWh	Jul 2018	Dec 2024	Wood/Wood Waste Solids : 69.3% Natural Gas : 28.2% Landfill Gas : 2.5%
POET Biorefining LLC - Corning	POET Biorefining LLC - Corning	Corning, IA	14 GWh	Sep 2018	Dec 2024	Natural Gas
POET Biorefining Lake Crystal	POET Biorefining Lake Crystal	Lake Crystal, MN	7 GWh	Mar 2005	Sep 2025	Natural Gas : 83.8% Distillate Fuel Oil : 16.2%
POET Biorefining Caro, LLC	POET Biorefining Caro, LLC	Caro, MI	14 GWh	May 2018	Dec 2024	Natural Gas
POET Biorefining - North Manchester, LLC	POET Biorefining - North Manchester, LLC	North Manchester, IN	17 GWh	May 2017	Dec 2024	Natural Gas
POET Biorefining - Jewell	POET Biorefining - Jewell	Jewell, IA	22 GWh	Feb 2019	Dec 2024	Natural Gas
POET Biorefining - Hudson	POET Biorefining - Hudson	Hudson, SD	17 GWh	Apr 2019	Dec 2024	Natural Gas
POET Biorefining - Gowrie	POET Biorefining - Gowrie	Gowrie, IA	21 GWh	Oct 2018	Dec 2024	Natural Gas
POET Biorefining - Shelbyville	POET Biorefing- Shelbyville	Shelbyville, IN	35 GWh	May 2020	Dec 2024	Natural Gas
Poet Bioprocessing Emmetsburg	Poet Bioprocessing Emmetsburg	Emmetsburg, IA	18 GWh	Nov 2023	Dec 2024	Natural Gas : 83.1% Other Biomass Solids : 16.9%
Port Allen (LA)	Placid Refining Co LLC	Port Allen, LA	43 GWh	Apr 1990	Dec 2024	Natural Gas
Stevens Point Mill	Pixelle Specialty Solution, LLC	Stevens Point, WI	13 GWh	Jan 2002	Dec 2024	Natural Gas
Clinton Solar 2b	Pivot Energy	Centralia, IL	81 MWh	Oct 2024	Dec 2024	Solar
Kankakee Solar 3	Pivot Energy	Manteno, IL	107 MWh	Oct 2024	Dec 2024	Solar
Pivot Energy Minnesota Solar 1	Pivot Energy	Clinton Falls, MN	1 GWh	May 2023	Dec 2024	Solar
Pivot Energy Minnesota Solar 10	Pivot Energy	Greenwald, MN	1 GWh	May 2023	Dec 2024	Solar
Kankakee Solar 1	Pivot Energy	Bourbonnais, IL	2 GWh	Apr 2024	Dec 2024	Solar
St. Clair Solar 3	Pivot Energy	Washington Park, IL	158 MWh	May 2024	Dec 2024	Solar
Putnam Solar 1B	Pivot Energy	Granville, IL	2 GWh	May 2024	Dec 2024	Solar
Marion Solar 4b LLC	Pivot Energy	Sandoval, IL	970 MWh	Apr 2024	Dec 2024	Solar
Putnam Solar 1	Pivot Energy	Granville, IL	2 GWh	Apr 2024	Dec 2024	Solar
Pioneer Prairie Wind Farm	Pioneer Prairie Wind Farm I, LLC	McIntire, IA	865 GWh	Sep 2008	Sep 2025	Wind
Pine Island Solar CSG	Pine Island Holdco, LLC	Pine Island, MN	6 GWh	Jan 2017	Dec 2024	Solar
Pine Bluff Energy Center	Pine Bluff Energy LLC	Pine Bluff, AR	827 GWh	Jul 2001	Sep 2025	Natural Gas
Pierre Solar	Pierre Solar	Pierre, SD	2 GWh	Aug 2016	Dec 2024	Solar
Phoenix Solar South Farms LLC Solar Farm	Phoenix Solar South Farms LLC	Champaign, IL	7 GWh	Nov 2015	Sep 2025	Solar
Pheasant Run Wind LLC	Pheasant Run Wind LLC	Pigeon, MI	257 GWh	Nov 2013	Sep 2025	Wind
Pepin Garden	Pepin Garden LLC	Kellogg, MN	2 GWh	Oct 2023	Dec 2024	Solar
Pegasus Wind	Pegasus Wind, LLC	Reese, MI	392 GWh	Nov 2019	Sep 2025	Wind
Pegasus Community Solar	Pegasus Community Solar	Brooten, MN	3 GWh	Jul 2017	Dec 2024	Solar
Pearl River Solar Park LLC	Pearl River Solar Park, LLC	Morton, MS	427 GWh	Jun 2024	Sep 2025	Solar
PCA, Filer City Mill	PCA, Filer City Mill	Filer City, MI	91 GWh	Dec 1949	Sep 2025	Natural Gas
Packaging of America Tomahawk Mill	PCA-Tomahawk Mill	Tomahawk, WI	111 GWh	Dec 1919	Dec 2024	Wood/Wood Waste Solids : 35.7% Natural Gas : 34.2% Black Liquor : 18.1% Water : 11.7%
Paynesville Community Solar	Paynesville Community Solar	Paynesville, MN	8 GWh	Nov 2016	Dec 2024	Solar
Paulson Community (CSG)	Paulson Community Solar LLC	St. Peter, MN	2 GWh	Mar 2020	Dec 2024	Solar
Palmer Community Solar LLC CSG	Palmer Community Solar LLC	North Branch, MN	2 GWh	Jul 2021	Dec 2024	Solar
DeRidder Mill	Packaging Corporation of America	DeRidder, LA	402 GWh	Sep 1969	Dec 2024	Black Liquor : 46.7% Wood/Wood Waste Solids : 34.3% Natural Gas : 18.9%
Ottumwa City of	Ottumwa City of	Ottumwa, IA	5 GWh	Jul 1931	Apr 2024	Water
Langdon Wind Energy Center	Otter Tail Power Co	Langdon, ND	95 GWh	Nov 2007	Dec 2024	Wind
Merricourt Wind Energy Center	Otter Tail Power Co	Kulm, ND	603 GWh	Nov 2020	Sep 2025	Wind
Solway CT	Otter Tail Power Co	Solway, MN	125 GWh	Apr 2003	Dec 2024	Natural Gas
Coyote	Otter Tail Power Co	Beulah, ND	2 TWh	Apr 1981	Sep 2025	Lignite Coal : 99.7%
Ashtabula Wind III LLC	Otter Tail Power Co	Luverne, ND	143 GWh	Nov 2010	Dec 2024	Wind
Jamestown	Otter Tail Power Co	Jamestown, ND	194 MWh	Apr 1976	Dec 2024	Distillate Fuel Oil
Hoot Lake	Otter Tail Power Co	Fergus Falls, MN	3 GWh	Aug 1914	Dec 2024	Water
Big Stone	Otter Tail Power Co	Big Stone City, SD	2 TWh	Apr 1975	Sep 2025	Subbituminous Coal : 99.8%
Ashtabula Wind Energy Center	Otter Tail Power Co	Luverne, ND	116 GWh	Sep 2008	Dec 2024	Wind
Lake Preston	Otter Tail Power Co	Lake Preston, SD	86 MWh	May 1978	Dec 2024	Distillate Fuel Oil
Luverne Wind Energy Center	Otter Tail Power Co	Luverne, ND	110 GWh	Aug 2009	Dec 2024	Wind
Hoot Lake Solar	Otter Tail Power Co	Fergus Falls, MN	73 GWh	Jul 2023	Sep 2025	Solar
Astoria Station	Otter Tail Power Co	Astoria, SD	459 GWh	Mar 2021	Sep 2025	Natural Gas
Otter Creek Ethanol Poet - Ashton	Otter Creek Ethanol LLC - Poet Ashton	Ashton, IA	43 GWh	Feb 2004	Sep 2025	Natural Gas
Otsego Mill Power Plant	Otsego Paper Inc	Otsego, MI	165 GWh	Oct 1995	Dec 2024	Natural Gas
Osceola Windpower II	Osceola Windpower II	Harris, IA	197 GWh	Aug 2008	Sep 2025	Wind
OREG 3 Inc	Ormat Nevada Inc	Trimont, MN	43 GWh	Jul 2010	Sep 2025	Waste Heat
Ivanhoe Generation Facility	Orion Engineered Carbons	Franklin, LA	53 GWh	Mar 2023	Dec 2024	Waste Heat
Benton County Wind Farm	Orion Energy Group LLC	Earl Park, IN	358 GWh	Apr 2008	Dec 2024	Wind
Orion Community Solar	Orion Community Solar	St. Joseph, MN	5 GWh	Dec 2016	Dec 2024	Solar
Optimum Wind 7 LLC	Optimum Wind 7 LLC	Nevada, IA	11 GWh	Feb 2017	Dec 2024	Wind
Optimum Wind 6 LLC	Optimum Wind 6 LLC	Nevada, IA	9 GWh	Feb 2017	Dec 2024	Wind
Optimum Wind 5 LLC	Optimum Wind 5 LLC	Nevada, IA	9 GWh	Feb 2017	Dec 2024	Wind
Optimum Wind 4 LLC	Optimum Wind 4 LLC	Nevada, IA	10 GWh	Feb 2017	Dec 2024	Wind
Optimum Wind 3 LLC	Optimum Wind 3 LLC	Nevada, IA	10 GWh	Feb 2017	Dec 2024	Wind
Indy Solar I, LLC	Onward Energy	Indianapolis, IN	16 GWh	Nov 2013	Sep 2025	Solar
Sumrall II Solar Farm	Onward Energy	Sumrall, MS	110 GWh	Nov 2017	Sep 2025	Solar
Indy Solar III, LLC	Onward Energy	Indianapolis, IN	13 GWh	Nov 2013	Sep 2025	Solar
Indy Solar II, LLC	Onward Energy	Indianapolis, IN	16 GWh	Nov 2013	Sep 2025	Solar
Olney Solar II CSG	Olney Solar II, LLC	Olney, IL	4 GWh	May 2021	Dec 2024	Solar
Olmsted Waste Energy	Olmsted County Public Works	Rochester, MN	47 GWh	Mar 1987	Dec 2024	Non-biogenic Municipal Solid Waste : 54.7% Biogenic Municipal Solid Waste : 44.7% Natural Gas : 0.5%
Oliver Wind III, LLC	Oliver Wind III, LLC	Mandan, ND	381 GWh	Dec 2016	Sep 2025	Wind
Olinda Trail Solar	Olinda Trail Solar LLC	Lindstrom, MN	2 GWh	Aug 2019	Dec 2024	Solar
Old Gold Energy Center, LLC	Old Gold Energy Center, LLC	Joice, IA	78 GWh	Sep 2001	Dec 2024	Wind
OE IL Solar 3	OE IL Solar 3, LLC	Oregon, IL	5 GWh	Feb 2022	Dec 2024	Solar
Stiles	Oconto Electric Cooperative	Oconto Falls, WI	6 GWh	Feb 1949	Dec 2024	Water
Taft Cogeneration Facility	Occidental Chemical Corporation	Hahnville, LA	5 TWh	Jun 2002	Sep 2025	Natural Gas : 98.8% Other Gas : 1.2%
Shakopee Met Council WTP	Oak Leaf Solar V LLC	Shakopee, MN	2 GWh	Feb 2016	Dec 2024	Solar
Novel OYA of Osakis CSG	NRG MN Community LLC	Osakis, MN	9 GWh	Jun 2018	Dec 2024	Solar
Novel - OYA of Mapleton CSG	NRG MN Community LLC	Mapleton, MN	6 GWh	Jun 2018	Dec 2024	Solar
Plum Point Energy Station	NRG Energy Services - Plum Point	Osceola, AR	4 TWh	Aug 2010	Sep 2025	Subbituminous Coal : 99.9%
Cottonwood Energy Company LP	NRG Cottonwood Tenant LLC	Deweyville, TX	5 TWh	Jun 2003	Sep 2025	Natural Gas

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	696.7 GWh	4
#27	Associated Electric Cooperative, Inc.	23.6 TWh	47
#13	Duke Energy Carolinas	112.5 TWh	565
#52	Duke Energy Progress West	4.3 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	34.4 TWh	25
#1	PJM Interconnection, LLC	870.7 TWh	2,465
#6	Southern Company Services, Inc. - Trans	250.9 TWh	417
#5	Southwest Power Pool	299.9 TWh	835
#49	Southwestern Power Administration	5.2 TWh	34
#9	Tennessee Valley Authority	161.6 TWh	204

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#1	PJM Interconnection, LLC	870.7 TWh	2,465
#2	Midcontinent Independent System Operator, Inc.	655.1 TWh	2,831
#4	Electric Reliability Council of Texas, Inc.	485.0 TWh	1,313
#5	Southwest Power Pool	299.9 TWh	835
#6	Southern Company Services, Inc. - Trans	250.9 TWh	417
#7	California Independent System Operator	188.0 TWh	2,075
#9	Tennessee Valley Authority	161.6 TWh	204
#10	Florida Power & Light Co.	148.9 TWh	187
#12	New York Independent System Operator	131.6 TWh	1,211
#13	Duke Energy Carolinas	112.5 TWh	565