New York Independent System Operator

Balancing Authority Summary Information

New York Independent System Operator is ranked #12 out of 65 balancing authorities in terms of total annual electricity generation.

Balancing Authority	New York Independent System Operator
States	New Jersey New York
Last Update	Dec 2024
Annual Generation	129.7 TWh
Power Plants	1,100
Utilities	542
Ranked #12 out of 65 in terms of net annual generation
Ranked #10 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 51.5% Water \| 20.7% Nuclear \| 19.9% Wind \| 4.6% Other Fuel \| 2.5%

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Daily Net Generation for New York Independent System Operator for the past 3 Years

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Rainbow Falls Hydro	Erie Boulevard Hydropower LP	Parishville, NY	119 GWh	Dec 1955	Dec 2023	Water
Grahamsville	New York Power Authority	Grahamsville, NY	76 GWh	Dec 1955	Dec 2023	Water
E F Barrett	National Grid Generation LLC	Island Park, NY	1 TWh	Oct 1956	Sep 2024	Natural Gas : 99.9%
Blake	Erie Boulevard Hydropower LP	Parishville, NY	70 GWh	Dec 1956	Dec 2023	Water
Stark	Erie Boulevard Hydropower LP	Colton, NY	111 GWh	Dec 1956	Dec 2023	Water
Greenport	Village of Greenport - (NY)	Greenport, NY	14 MWh	May 1957	Dec 2023	Distillate Fuel Oil
Robert Moses Power Dam	New York Power Authority	Massena, NY	8 TWh	Jun 1958	Sep 2024	Water
Port Jefferson	National Grid Generation LLC	Port Jefferson, NY	396 GWh	Oct 1958	Sep 2024	Natural Gas : 96.9% Residual Fuel Oil : 2.9%
Prospect	Erie Boulevard Hydropower LP	Prospect, NY	81 GWh	Dec 1958	Dec 2023	Water
Dunn Paper	BiOrigin Specialty Products	Gouverneur, NY	6 GWh	Dec 1958	Dec 2023	Water
Arthur Kill Generating Station	NRG Arthur Kill Operations Inc	Staten Island, NY	1 TWh	Aug 1959	Sep 2024	Natural Gas
St. Joseph Hospital	St. Joseph Hospital (NY)	Yonkers, NY	14 MWh	Dec 1959	Dec 2023	Distillate Fuel Oil
Mt.Sinai-St.Lukes Roosevelt Hosp. Center	Mt.Sinai-St.Lukes Rsvlt. Hospital Center	New York, NY	61 MWh	Dec 1959	Dec 2023	Distillate Fuel Oil
Robert Moses Niagara	New York Power Authority	Lewiston, NY	16 TWh	Dec 1960	Sep 2024	Water
East Hampton	National Grid Generation LLC	East Hampton, NY	12 GWh	Nov 1962	Dec 2023	Distillate Fuel Oil
Ravenswood	Ravenswood Operations LLC	Long Island, NY	3 TWh	Jan 1963	Sep 2024	Natural Gas : 99.7%
Southold	National Grid Generation LLC	Greenport, NY	693 MWh	Jul 1964	Dec 2023	Distillate Fuel Oil
Shoreham	National Grid Generation LLC	Wading River, NY	767 MWh	Mar 1966	Dec 2023	Distillate Fuel Oil
Northport	National Grid Generation LLC	Northport, NY	3 TWh	Feb 1967	Sep 2024	Natural Gas : 98.7% Residual Fuel Oil : 1.3%
Glenwood Landing	National Grid Generation LLC	Glenwood Landing, NY	154 GWh	Mar 1967	Dec 2023	Natural Gas : 99.8%
Harris Lake	New York State Elec & Gas Corp	Town of Newcomb, NY	1 MWh	Aug 1967	Dec 2023	Distillate Fuel Oil
St Johns Riverside Hospital	St Johns Riverside Hospital	Yonkers, NY	6 MWh	Dec 1967	Dec 2023	Distillate Fuel Oil
74th Street	Consolidated Edison Co-NY Inc	New York, NY	176 MWh	Sep 1968	Dec 2023	Kerosene
59th Street	Consolidated Edison Co-NY Inc	New York, NY	612 MWh	May 1969	Dec 2023	Natural Gas
West Coxsackie	Central Hudson Gas & Elec Corp	Coxsackie, NY	521 MWh	Nov 1969	Dec 2023	Natural Gas
Nine Mile Point Nuclear Station	Constellation Nuclear	Lycoming, NY	16 TWh	Nov 1969	Sep 2024	Nuclear
Astoria Gas Turbines	NRG Astoria Gas Turbine Operations Inc	Astoria, NY	33 GWh	Dec 1969	May 2023	Natural Gas : 86.8% Kerosene : 13.2%
Ticonderoga Mill	Sylvamo North America LLC	Ticonderoga, NY	174 GWh	Dec 1969	Sep 2024	Natural Gas : 59.7% Black Liquor : 33.2% Residual Fuel Oil : 4.1% Wood/Wood Waste Solids : 3.0%
South Cairo	Central Hudson Gas & Elec Corp	Cairo, NY	113 MWh	May 1970	Dec 2023	Kerosene
Mount Sinai Hospital	Mount Sinai Hospital	New York, NY	263 MWh	May 1970	Dec 2023	Distillate Fuel Oil
R E Ginna Nuclear Power Plant	Constellation Nuclear	Ontario, NY	5 TWh	Jun 1970	Sep 2024	Nuclear
Gowanus Gas Turbines Generating	U S Power Generating Company LLC	Brooklyn, NY	11 GWh	May 1971	Dec 2023	Natural Gas : 93.2% Distillate Fuel Oil : 6.8%
Saint Catherine of Siena Medical Center	Saint Catherine of Siena Medical Center	Smithtown, NY	13 MWh	Dec 1971	Dec 2023	Distillate Fuel Oil
Woodhull Hospital	Woodhull Hospital	Brooklyn, NY	143 MWh	Dec 1971	Dec 2023	Distillate Fuel Oil
Narrows Gas Turbines Generating	U S Power Generating Company LLC	Brooklyn, NY	31 GWh	Apr 1972	Dec 2023	Natural Gas : 96.0% Distillate Fuel Oil : 4.0%
Glenwood	National Grid Generation LLC	Glenwood Landing, NY	568 MWh	May 1972	Dec 2023	Distillate Fuel Oil
Hillburn	Alliance NYGT, LLC	Hillburn, NY	665 MWh	Jun 1972	Dec 2023	Natural Gas
Shoemaker	Alliance NYGT, LLC	Middletown, NY	563 MWh	Jun 1972	Dec 2023	Natural Gas
Bowline Point	Bowline, LLC	West Haverstraw, NY	1 TWh	Aug 1972	Sep 2024	Natural Gas
Plant No 2 Freeport	Village of Freeport - (NY)	Freeport, NY	25 GWh	Apr 1973	Dec 2023	Natural Gas : 99.3% Kerosene : 0.7%
Westchester County Medical Center	Westchester County Medical Center	Valhalla, NY	102 MWh	Dec 1973	Dec 2023	Distillate Fuel Oil
Holtsville	National Grid Generation LLC	Holtsville, NY	16 GWh	Jun 1974	Dec 2023	Kerosene
Roseton Generating Facility	CCI Roseton LLC	Newsburgh, NY	247 GWh	Aug 1974	Sep 2024	Natural Gas : 92.2% Residual Fuel Oil : 7.8%
Brooklyn Hospital Center	Brooklyn Hospital Center	Brooklyn, NY	27 MWh	Dec 1974	Dec 2023	Distillate Fuel Oil
Mount Sinai South Nassau Hospital	Mount Sinai South Nassau Hospital	Oceanside, NY	25 MWh	Dec 1974	Dec 2023	Distillate Fuel Oil
Oswego Harbor Power	Oswego Harbor Power	Oswego, NY	43 GWh	May 1975	Jul 2024	Residual Fuel Oil
Montefiore Mount Vernon Hospital	Montefiore Mount Vernon Hospital	Mount Vernon, NY	55 MWh	Dec 1975	Dec 2023	Distillate Fuel Oil
James A Fitzpatrick	Constellation Nuclear	Lycoming, NY	7 TWh	Jul 1976	Sep 2024	Nuclear
Lower Beaver Falls Project	Eagle Creek Renewable Energy, LLC	Beaver Falls, NY	5 GWh	Nov 1979	Dec 2023	Water
Good Samaritan Hospital	Good Samaritan Hospital	Suffern, NY	46 MWh	Dec 1979	Dec 2023	Distillate Fuel Oil : 94.6% Natural Gas : 5.4%
Covanta Niagara I, LLC	Covanta Energy of Niagara LP	Niagara Falls, NY	184 GWh	Jul 1980	Sep 2024	Non-biogenic Municipal Solid Waste : 51.0% Biogenic Municipal Solid Waste : 41.7% Natural Gas : 7.2%
Goodyear Lake Plant	Hydroland Omega LLC	Oneonta, NY	3 GWh	Jul 1980	Aug 2023	Water
Cornell Hydro	Cornell Hydro	Ithaca, NY	4 GWh	Nov 1981	Sep 2024	Water
Chasm Hydro Partnership	Ampersand Chasm Hydro LLC	Chateaugay, NY	5 GWh	Feb 1982	Dec 2023	Water
Ashokan	New York Power Authority	Kingston, NY	11 GWh	Oct 1982	Dec 2023	Water
Granby	Erie Boulevard Hydropower LP	Fulton, NY	37 GWh	Dec 1982	Dec 2023	Water
The Bank of New York	The Bank of New York	New York, NY	30 MWh	Dec 1982	Dec 2023	Distillate Fuel Oil
Normanskill Hydro Project	Watervliet City of	Guilderland, NY	3 GWh	Mar 1983	Dec 2023	Water
Montefiore - Westchester Square	Montefiore-Westchester Square	Bronx, NY	3 MWh	Jun 1983	Dec 2023	Distillate Fuel Oil
Upper Mechanicville	New York State Elec & Gas Corp	Town of Stillwater, NY	80 GWh	Aug 1983	Dec 2023	Water
New York University Central Plant	New York University	New York, NY	74 GWh	Dec 1983	Dec 2023	Natural Gas : 92.5% Distillate Fuel Oil : 7.5%
Black River Hydro Associates	Central Rivers Power US, LLC	Port Layden, NY	17 GWh	Dec 1983	Dec 2023	Water
Center Falls	Hollingworth & Vose Co Center Falls	Greenwich, NY	5 GWh	Dec 1983	Dec 2023	Water
Copenhagen Plant	Central Rivers Power US, LLC	Copenhagen, NY	9 GWh	May 1984	Dec 2023	Water
Lyonsdale Associates	Eagle Creek Renewable Energy, LLC	Lyons Falls, NY	12 GWh	Jun 1984	Dec 2023	Water
Unionville Hydro Project 2499 NY	Erie Boulevard Hydropower LP	Norwood, NY	15 GWh	Jun 1984	Dec 2023	Water
Hewittville Hydroelectric	Erie Boulevard Hydropower LP	Norwood, NY	13 GWh	Aug 1984	Dec 2023	Water
Wheelabrator Westchester	Wheelabrator Environmental Systems	Peekskill, NY	400 GWh	Sep 1984	Sep 2024	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Fort Miller Hydroelectric Facility	Fort Miller Associates	Northumberland, NY	20 GWh	Nov 1984	Dec 2023	Water
Upper Beaver Falls Project	Eagle Creek Renewable Energy, LLC	Beaver Falls, NY	9 GWh	Dec 1984	Dec 2023	Water
Diana Hydroelectric	EONY Generation Limited	Harrisville, NY	8 GWh	Jun 1985	Dec 2023	Water
Dolgeville Hydro	EONY Generation Limited	Dolgeville, NY	14 GWh	Jun 1985	Dec 2023	Water
Valley Falls Hydroelectric Facility	Valley Falls Associates	Valley Falls, NY	11 GWh	Jul 1985	Dec 2023	Water
Curtis Palmer Hydroelectric	Palmer Hydroelectric	Corinth, NY	393 GWh	Sep 1985	Dec 2023	Water
West End Dam Hydroelectric Project	Elevate Power Management LLC	Carthage, NY	23 GWh	Sep 1985	Dec 2023	Water
Port Leyden Hydroelectric Project	Empire Hydro Partners	Port Leyden, NY	5 GWh	Nov 1985	Dec 2023	Water
Talcville	Erie Boulevard Hydropower LP	Edwards, NY	643 MWh	Dec 1985	Dec 2023	Water
Oswego County Energy Recovery	Oswego County	Fulton, NY	7 GWh	Jan 1986	Dec 2023	Non-biogenic Municipal Solid Waste : 55.0% Biogenic Municipal Solid Waste : 45.0%
Walden	Hydroland Omega LLC	Walden, NY	840 MWh	Mar 1986	Dec 2023	Water
US Gypsum Oakfield	U S Gypsum Co	Oakfield, NY	16 GWh	Mar 1986	Dec 2023	Natural Gas
Tannery Island Power	Elevate Power Management LLC	Carthage, NY	5 GWh	May 1986	Dec 2022	Water
Philadlephia	EONY Generation Limited	Village of Philadelph, NY	10 GWh	Sep 1986	Dec 2023	Water
Central Hudson High Falls	Central Hudson Gas & Elec Corp	High Falls, NY	8 GWh	Nov 1986	Dec 2023	Water
Victory Mills	Central Rivers Power US, LLC	Victory Mills, NY	4 GWh	Nov 1986	Dec 2022	Water
Union Falls	Union Falls Hydro Power LP	Au Sable Forks, NY	10 GWh	Dec 1986	Dec 2023	Water
Stillwater Reservoir Hydro	Stillwater Associates	Webb, NY	6 GWh	Dec 1986	Dec 2023	Water
Little Falls Hydro	Eagle Creek Renewable Energy, LLC	Little Falls, NY	50 GWh	Dec 1986	Dec 2023	Water
Hampshire Paper	Hampshire Paper Co Inc	Gouverneur, NY	15 GWh	Apr 1987	Jul 2023	Water
Finch Paper	Finch Paper LLC	Glen Falls, NY	125 GWh	May 1987	Dec 2023	Wood Waste Liquids, excluding Black Liquor : 50.6% Natural Gas : 29.5% Wood/Wood Waste Solids : 19.9%
Dutchess Cnty Resource Recovery Facility	Dutchess County RRA	Poughkeepsie, NY	10 GWh	Oct 1987	Dec 2023	Non-biogenic Municipal Solid Waste : 47.8% Biogenic Municipal Solid Waste : 39.1% Natural Gas : 13.1%
Moose River	EONY Generation Limited	Lyons Falls, NY	32 GWh	Oct 1987	Dec 2023	Water
Lachute Hydro Upper	Central Rivers Power US, LLC	Ticonderoga, NY	19 GWh	Nov 1987	Dec 2023	Water
Fourth Branch Hydroelectric Facility	Albany Engineering Corporation	Waterford, NY	11 GWh	Nov 1987	Dec 2023	Water
Forestport	Clear Energy Capital, LLC	Forestport, NY	7 GWh	Nov 1987	Dec 2022	Water
Lachute Hydro Lower	Central Rivers Power US, LLC	Ticonderoga, NY	19 GWh	Nov 1987	Dec 2023	Water
Ogdensburg	Ampersand Ogdensburg Hydro, LLC	Ogdensburg, NY	4 GWh	Nov 1987	Dec 2023	Water
Dahowa Hydro	GR Catalyst Two LLC	Greenwich, NY	45 GWh	Nov 1987	Dec 2023	Water
Newport Hydro	Eagle Creek Renewable Energy, LLC	Newport, NY	5 GWh	Nov 1987	Dec 2023	Water
Hollow Dam Power Partnership	Ampersand Hollow Dam Hydro LLC	Gouveneur, NY	3 GWh	Nov 1987	Dec 2023	Water
Mount Sinai Beth Israel	Mount Sinai Beth Israel	New York, NY	35 MWh	Dec 1987	Dec 2023	Distillate Fuel Oil

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	906.2 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.0 TWh	85
#13	Duke Energy Carolinas	111.5 TWh	556
#17	Duke Energy Progress East	63.3 TWh	554
#51	Duke Energy Progress West	4.1 TWh	10
#15	ISO New England	103.6 TWh	1,487
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	33.2 TWh	20
#1	PJM Interconnection, LLC	844.3 TWh	2,305
#31	South Carolina Public Service Authority	18.1 TWh	33
#60	Southeastern Power Administration	1.6 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#6	Southern Company Services, Inc. - Trans	248.7 TWh	393
#7	California Independent System Operator	191.3 TWh	1,943
#9	Tennessee Valley Authority	158.1 TWh	170
#10	Florida Power & Light Co.	147.2 TWh	159
#12	New York Independent System Operator	129.7 TWh	1,100
#13	Duke Energy Carolinas	111.5 TWh	556
#15	ISO New England	103.6 TWh	1,487
#16	Bonneville Power Administration	80.1 TWh	158
#17	Duke Energy Progress East	63.3 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	58.9 TWh	45