New York Independent System Operator

Balancing Authority Summary Information

New York Independent System Operator is ranked #12 out of 64 balancing authorities in terms of total annual electricity generation.

Balancing Authority	New York Independent System Operator
States	New Jersey New York
Last Update	Oct 2026
Annual Generation	134.1 TWh
Power Plants	1,334
Utilities	620
Ranked #12 out of 64 in terms of net annual generation
Ranked #9 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 54.2% Nuclear \| 19.4% Water \| 18.3% Wind \| 5.2% Other Fuel \| 2.9%

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

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Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Southold	National Grid Generation LLC	Greenport, NY	483 MWh	Jul 1964	Dec 2025	Distillate Fuel Oil
South Hampton	National Grid Generation LLC	Southampton, NY	181 MWh	Feb 1963	Dec 2025	Distillate Fuel Oil
Ravenswood	Ravenswood Operations LLC	Long Island, NY	3 TWh	Jan 1963	Jul 2026	Natural Gas : 84.6% Distillate Fuel Oil : 15.4%
East Hampton	National Grid Generation LLC	East Hampton, NY	11 GWh	Nov 1962	Dec 2025	Distillate Fuel Oil
Robert Moses Niagara	New York Power Authority	Lewiston, NY	14 TWh	Dec 1960	Jul 2026	Water
St. Joseph Hospital	St. Joseph Hospital (NY)	Yonkers, NY	10 MWh	Dec 1959	Dec 2025	Distillate Fuel Oil
Mt. Sinai- Morningside	Mt. Sinai- Morningside	New York, NY	26 MWh	Dec 1959	Dec 2025	Distillate Fuel Oil
Arthur Kill Generating Station	Arthur Kill Power, LLC	Staten Island, NY	1 TWh	Aug 1959	Jul 2026	Natural Gas
Prospect	Erie Boulevard Hydropower LP	Prospect, NY	55 GWh	Dec 1958	Dec 2025	Water
Dunn Paper	BiOrigin Specialty Products	Gouverneur, NY	5 GWh	Dec 1958	Dec 2025	Water
Port Jefferson	National Grid Generation LLC	Port Jefferson, NY	404 GWh	Oct 1958	Jul 2026	Natural Gas : 80.8% Residual Fuel Oil : 17.9% Distillate Fuel Oil : 1.3%
Robert Moses Power Dam	New York Power Authority	Massena, NY	7 TWh	Jun 1958	Jul 2026	Water
Greenport	Village of Greenport - (NY)	Greenport, NY	11 MWh	May 1957	Dec 2025	Distillate Fuel Oil
Blake	Erie Boulevard Hydropower LP	Parishville, NY	48 GWh	Dec 1956	Dec 2025	Water
Stark	Erie Boulevard Hydropower LP	Colton, NY	79 GWh	Dec 1956	Dec 2025	Water
E F Barrett	National Grid Generation LLC	Island Park, NY	1 TWh	Oct 1956	Jul 2026	Natural Gas : 95.6% Residual Fuel Oil : 3.8% Distillate Fuel Oil : 0.6%
Rainbow Falls Hydro	Erie Boulevard Hydropower LP	Parishville, NY	84 GWh	Dec 1955	Dec 2025	Water
Grahamsville	New York Power Authority	Grahamsville, NY	85 GWh	Dec 1955	Dec 2025	Water
Kosterville	Northbrook Lyons Falls LLC	Lyonsdale, NY	2 GWh	Apr 1955	Dec 2025	Water
Five Falls	Erie Boulevard Hydropower LP	Colton, NY	80 GWh	Dec 1954	Dec 2025	Water
RED-Rochester, LLC	RED-Rochester, LLC	Rochester, NY	342 GWh	Jul 1954	Jul 2026	Natural Gas
Astoria Generating Station	Astoria Generating Company, L.P.	Astoria, NY	1 TWh	Feb 1954	Dec 2025	Natural Gas : 98.9% Residual Fuel Oil : 1.1%
South Colton	Erie Boulevard Hydropower LP	Colton, NY	68 GWh	Dec 1953	Dec 2025	Water
Neversink	New York Power Authority	Grahmsville, NY	12 GWh	Nov 1953	Nov 2025	Water
Greenidge Generation LLC	Greenidge Generation Holdings LLC	Dresden, NY	625 GWh	Nov 1953	Dec 2025	Natural Gas
Gouldtown	Northbrook Lyons Falls LLC	Lyonsdale, NY	6 GWh	Jul 1953	Dec 2025	Water
Rochester 26	Rochester Gas & Electric Corp	Rochester, NY	3 GWh	Jul 1952	Dec 2025	Water
Stewarts Bridge	Erie Boulevard Hydropower LP	Corinth, NY	90 GWh	Dec 1951	Dec 2025	Water
Danskammer Generating Station	Danskammer Energy	Newburgh, NY	27 GWh	Nov 1951	Dec 2025	Natural Gas : 99.8%
East River	Consolidated Edison Co-NY Inc	New York, NY	3 TWh	Oct 1951	Jul 2026	Natural Gas
S A Carlson	Jamestown Board of Public Util	Jamestown, NY	73 GWh	Jul 1951	Dec 2025	Natural Gas
Glenwood Hydro	Erie Boulevard Hydropower LP	Medina, NY	7 GWh	Dec 1949	Dec 2025	Water
Pyrites Plant	Central Rivers Power US, LLC	Pyrites, NY	25 GWh	Dec 1948	Dec 2025	Water
Brookfield Power Glen Falls Hydro	Erie Boulevard Hydropower LP	Glen Falls, NY	35 GWh	Dec 1943	Dec 2025	Water
Mill C	New York State Elec & Gas Corp	Town of Plattsburgh, NY	22 GWh	Jul 1943	Dec 2025	Water
Hydraulic Race	Erie Boulevard Hydropower LP	Lockport, NY	7 GWh	Dec 1941	Dec 2025	Water
Charles P Keller	Village of Rockville Centre - (NY)	Rockville Centre, NY	1 GWh	Dec 1941	Dec 2025	Natural Gas : 85.6% Distillate Fuel Oil : 14.4%
Plant No 1 Freeport	Village of Freeport - (NY)	Freeport, NY	26 MWh	Dec 1940	Dec 2025	Distillate Fuel Oil
Macomb	Erie Boulevard Hydropower LP	Malone, NY	6 GWh	Dec 1939	Dec 2025	Water
Yaleville	Erie Boulevard Hydropower LP	Norfolk, NY	3 GWh	Dec 1939	Jul 2025	Water
Swinging Bridge 2	Eagle Creek Renewable Energy, LLC	Forestburgh, NY	12 GWh	Jul 1939	Dec 2025	Water
Bennetts Bridge	Erie Boulevard Hydropower LP	Altmar, NY	90 GWh	Dec 1931	Dec 2025	Water
Beebee Island Hydro Plant	Erie Boulevard Hydropower LP	Watertown, NY	40 GWh	Dec 1930	Dec 2025	Water
Dexter Plant	Central Rivers Power US, LLC	Dexter, NY	7 GWh	Dec 1930	Dec 2025	Water
Lighthouse Hill	Erie Boulevard Hydropower LP	Altmar, NY	23 GWh	Dec 1929	Dec 2025	Water
E J West	Erie Boulevard Hydropower LP	Lake Luzerne, NY	50 GWh	Dec 1929	Dec 2025	Water
Moshier	Erie Boulevard Hydropower LP	Lowville, NY	35 GWh	Dec 1928	Dec 2025	Water
High Dam	Oswego, City of - (NY)	Oswego, NY	19 GWh	Jul 1928	Dec 2025	Water
Eel Weir	Erie Boulevard Hydropower LP	Oswegatchie, NY	8 GWh	Dec 1927	Dec 2025	Water
East Norfolk	Erie Boulevard Hydropower LP	Norfolk, NY	21 GWh	Dec 1927	Dec 2025	Water
Norfolk	Erie Boulevard Hydropower LP	Norfolk, NY	22 GWh	Dec 1927	Dec 2025	Water
Norwood	Erie Boulevard Hydropower LP	Norwood, NY	12 GWh	Dec 1927	Dec 2025	Water
Raymondville	Erie Boulevard Hydropower LP	Norfolk, NY	11 GWh	Dec 1927	Dec 2025	Water
Rio	Eagle Creek Renewable Energy, LLC	Glen Spey, NY	14 GWh	Nov 1927	Dec 2025	Water
Allens Falls	Erie Boulevard Hydropower LP	Parishville, NY	21 GWh	Dec 1926	Dec 2025	Water
Theresa Plant	Energen Renewables, LLC	Theresa, NY	4 GWh	Dec 1926	Dec 2025	Water
Upper Newton Falls	Erie Boulevard Hydropower LP	Newton Falls, NY	6 GWh	Dec 1926	Dec 2025	Water
Rainbow Falls Auscble	New York State Elec & Gas Corp	Town of Auscble, NY	8 GWh	Jul 1926	May 2025	Water
Varick	Erie Boulevard Hydropower LP	Oswego, NY	20 GWh	Dec 1925	Dec 2025	Water
Deferiet	Erie Boulevard Hydropower LP	Deferiet, NY	40 GWh	Dec 1924	Dec 2025	Water
High Falls - Croghan NY	Erie Boulevard Hydropower LP	Croghan, NY	25 GWh	Dec 1924	Dec 2025	Water
Parishville	Erie Boulevard Hydropower LP	Parishville, NY	12 GWh	Dec 1924	Dec 2025	Water
Sewalls	Erie Boulevard Hydropower LP	Watertown, NY	12 GWh	Dec 1924	Dec 2025	Water
Soft Maple	Erie Boulevard Hydropower LP	Croghan, NY	32 GWh	Dec 1924	Dec 2025	Water
Watertown	City of Watertown - (NY)	Watertown, NY	19 GWh	Jul 1924	Dec 2025	Water
Crescent	New York Power Authority	Crescent, NY	50 GWh	Jun 1924	Dec 2025	Water
Vischer Ferry	New York Power Authority	Rexford, NY	47 GWh	Jun 1924	Dec 2025	Water
Sturgeon	Central Hudson Gas & Elec Corp	Tillson, NY	49 GWh	Dec 1923	Dec 2025	Water
Beardslee	Erie Boulevard Hydropower LP	Little Falls, NY	43 GWh	Dec 1923	Dec 2025	Water
Flat Rock	Erie Boulevard Hydropower LP	Fine, NY	15 GWh	Dec 1923	Dec 2025	Water
Fulton Hydro	Erie Boulevard Hydropower LP	Fulton, NY	5 GWh	Dec 1923	Dec 2025	Water
Herrings	Erie Boulevard Hydropower LP	Carthage, NY	18 GWh	Dec 1923	Dec 2025	Water
Heuvelton	Erie Boulevard Hydropower LP	Village of Heuvelton, NY	4 GWh	Dec 1923	Dec 2025	Water
Piercefield	Erie Boulevard Hydropower LP	Piercefield, NY	11 GWh	Dec 1923	Dec 2025	Water
Sugar Island	Erie Boulevard Hydropower LP	Potsdam, NY	23 GWh	Dec 1923	Dec 2025	Water
Feeder Dam Hydro Plant	Erie Boulevard Hydropower LP	S. Glen Falls, NY	21 GWh	Dec 1923	Dec 2025	Water
Lyons Falls Hydroelectric	Northbrook Lyons Falls LLC	Lyons Falls, NY	27 GWh	Nov 1923	Dec 2025	Water
Browns Falls	Erie Boulevard Hydropower LP	Oswegatchie, NY	49 GWh	Dec 1922	Dec 2025	Water
Sherman Island	Erie Boulevard Hydropower LP	Queensbury, NY	139 GWh	Dec 1922	Dec 2025	Water
Green Island Hydroelectric Station	Albany Engineering Corporation	Green Island, NY	38 GWh	Oct 1922	Dec 2025	Water
Hailesboro 4 Plant	Central Rivers Power US, LLC	Hailesboro, NY	10 GWh	Dec 1921	Dec 2025	Water
Cadyville	New York State Elec & Gas Corp	Town ofSchuyler Falls, NY	18 GWh	Jul 1921	Dec 2025	Water
Kamargo	Erie Boulevard Hydropower LP	Black River, NY	21 GWh	Dec 1920	Dec 2025	Water
Waterport	Erie Boulevard Hydropower LP	Waterport, NY	14 GWh	Dec 1920	Dec 2025	Water
Dashville	Central Hudson Gas & Elec Corp	Dashville, NY	12 GWh	Dec 1919	Dec 2025	Water
Black River	Erie Boulevard Hydropower LP	Black River, NY	32 GWh	Dec 1919	Dec 2025	Water
Schuylerville	Erie Boulevard Hydropower LP	Schuylerville, NY	7 GWh	Dec 1918	Dec 2025	Water
Trenton Falls	Erie Boulevard Hydropower LP	Barneveld, NY	118 GWh	Dec 1918	Dec 2025	Water
Colton	Erie Boulevard Hydropower LP	Pierrepont, NY	154 GWh	Dec 1917	Dec 2025	Water
Seneca Falls Hydroelectric Project	C-S Canal Hydro, LLC	Seneca Falls, NY	7 GWh	Dec 1916	Dec 2025	Water
Elmer	Erie Boulevard Hydropower LP	Croghan, NY	10 GWh	Dec 1915	Dec 2025	Water
Minetto	Erie Boulevard Hydropower LP	Minetto, NY	31 GWh	Dec 1914	Dec 2025	Water
School Street	Erie Boulevard Hydropower LP	Cohoes, NY	146 GWh	Dec 1914	Dec 2025	Water
Waterloo Hydroelectric Project	C-S Canal Hydro, LLC	Waterloo, NY	2 GWh	Dec 1914	Dec 2025	Water
Eagle	Erie Boulevard Hydropower LP	Croghan, NY	28 GWh	Dec 1913	Dec 2025	Water
Hannawa	Erie Boulevard Hydropower LP	Pierrepont, NY	44 GWh	Dec 1913	Dec 2025	Water
Oswego Falls East	Erie Boulevard Hydropower LP	Fulton, NY	22 GWh	Dec 1913	Dec 2025	Water
Oswego Falls West	Erie Boulevard Hydropower LP	Fulton, NY	3 GWh	Dec 1913	Dec 2025	Water
Diamond Island Plant	Energen Renewables, LLC	Watertown, NY	2 GWh	Dec 1913	Dec 2025	Water
Chasm	Erie Boulevard Hydropower LP	Malone, NY	21 GWh	Dec 1912	Dec 2025	Water

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	433.0 GWh	4
#24	Dominion Energy South Carolina, Inc.	26.1 TWh	83
#13	Duke Energy Carolinas	113.4 TWh	578
#17	Duke Energy Progress East	66.2 TWh	574
#50	Duke Energy Progress West	4.6 TWh	15
#15	ISO New England	112.2 TWh	1,667
#23	Louisville Gas and Electric Company and Kentucky Utilities Company	34.2 TWh	25
#1	PJM Interconnection, LLC	890.9 TWh	2,806
#28	South Carolina Public Service Authority	19.6 TWh	35
#59	Southeastern Power Administration	1.2 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#6	Southern Company Services, Inc. - Trans	259.3 TWh	423
#7	California Independent System Operator	168.7 TWh	2,170
#9	Tennessee Valley Authority	166.2 TWh	209
#10	Florida Power & Light Co.	153.0 TWh	188
#12	New York Independent System Operator	134.1 TWh	1,334
#13	Duke Energy Carolinas	113.4 TWh	578
#15	ISO New England	112.2 TWh	1,667
#16	Bonneville Power Administration	91.1 TWh	170
#17	Duke Energy Progress East	66.2 TWh	574
#18	PacifiCorp East	61.4 TWh	223