ISO New England

Balancing Authority Summary Information

ISO New England is ranked #15 out of 65 balancing authorities in terms of total annual electricity generation.

Balancing Authority	ISO New England
States	Connecticut Maine Massachusetts New Hampshire New York Rhode Island Vermont
Last Update	Nov 2024
Annual Generation	102.8 TWh
Power Plants	1,487
Utilities	782
Ranked #15 out of 65 in terms of net annual generation
Ranked #11 out of 53 in terms of annual generation from natural gas
Power Plant Types	Natural Gas \| 57.6% Nuclear \| 25% Water \| 7.7% Other Fuel \| 4.6% Wind \| 3.3% Solar \| 1.2% Coal \| 0.1%

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Daily Net Generation for ISO New England for the past 3 Years

Plant Name	Utility	Location	Annual Generation	Plant Date	Last Update	Fuel Types
Gilman Mill	Ampersand Gilman Hydro LP	Gilman, VT	28 GWh	Dec 1940	Dec 2023	Water
University Solar, LLC	AES Distributed Energy	West Greenwich, RI	28 GWh	Nov 2019	Aug 2024	Solar
Rolfe Canal Hydro	Briar-Hydro Associates	Penacook, NH	28 GWh	Nov 1987	Dec 2023	Water
GD West Greenwich Nooseneck I, LLC	GD West Greenwich Nooseneck I, LLC	West Greenwich, RI	28 GWh	Nov 2022	Dec 2023	Solar
Medway Hydro	Brookfield Black Bear Hydro, LLC	Medway, ME	28 GWh	Dec 1922	Dec 2023	Water
Gold Meadow Farms	Captona Lippitt Ave Cranston LLC	Cranston, RI	27 GWh	Apr 2019	Dec 2023	Solar
Coolidge Solar 1, LLC	Coolidge Solar I, LLC	Ludlow, VT	27 GWh	Nov 2018	Aug 2024	Solar
HSCo CHP	Cartier Energy, LLC	Hartford, CT	27 GWh	Sep 2009	Dec 2023	Natural Gas
William F Wyman Hybrid	FPL Energy Wyman LLC	Yarmouth, ME	26 GWh	Dec 1956	Aug 2024	Residual Fuel Oil : 98.9% Distillate Fuel Oil : 1.1%
Danbury Hospital Cogen Plant	Danbury Hospital	Danbury, CT	26 GWh	Oct 2011	Dec 2023	Natural Gas
Hampton Facility	Foss Manufacturing Company LLC	Hampton, NH	26 GWh	Sep 1978	Aug 2024	Natural Gas
Stony Brook	Massachusetts Mun Wholes Electric Co	Ludlow, MA	26 GWh	Oct 1981	Aug 2024	Distillate Fuel Oil : 98.4% Natural Gas : 1.6%
Orono B	Brookfield Black Bear Hydro, LLC	Orono, ME	26 GWh	Oct 2013	Dec 2023	Water
Fairfield University CHP Plant	Fairfield University	Fairfield, CT	25 GWh	Sep 2007	Dec 2023	Natural Gas
Georgia Mountain Community Wind Farm	Greenbacker Renewable Energy Corporation	Milton, VT	25 GWh	Nov 2012	Aug 2024	Wind
Milo PV - BD Solar 1 LLC	BD Solar 1 LLC	Milo, ME	25 GWh	May 2021	Dec 2023	Solar
Frito Lay Incorporated	Frito Lay Incorporated Dayville	Dayville, CT	24 GWh	Feb 2009	Aug 2024	Natural Gas
Pisgah Mountain Wind	Pisgah Mountain, LLC	Clifton, ME	24 GWh	Nov 2016	Dec 2023	Wind
Alton Road Solar	Revity Energy LLC	Bradford, RI	24 GWh	Nov 2019	Dec 2023	Solar
Lockwood Hydroelectric Facility	Merimil Ltd Partnership	Waterville, ME	24 GWh	Sep 1985	Dec 2023	Water
Woods Hill Solar	Woods Hill Solar, LLC	Pomfret, CT	24 GWh	Nov 2018	Aug 2024	Solar
Fairfax Falls	Green Mountain Power Corp	Fairfax, VT	23 GWh	Jan 1919	Dec 2023	Water
Penacook Lower Falls	Briar-Hydro Associates	Boscawen, NH	23 GWh	Jul 1983	Dec 2023	Water
Putts Bridge	Central Rivers Power MA, LLC	Ludlow, MA	22 GWh	Dec 1917	Dec 2023	Water
Wallingford Solar	Wallingford Renewable Energy, LLC	Wallingford, CT	22 GWh	Aug 2021	Dec 2023	Solar
Searsburg	Great River Hydro, LLC	Searsburg, VT	22 GWh	Feb 1922	Dec 2023	Water
Boatlock	City of Holyoke Gas and Electric Dept.	Holyoke, MA	21 GWh	Dec 1920	Dec 2023	Water
UDR Glastonbury Fuel Cell	UIL Distributed Resources, LLC	Glastonbury, CT	21 GWh	Jan 2016	Dec 2023	Natural Gas
Bucksport Generation LLC	Bucksport Generation LLC	Bucksport, ME	21 GWh	Jun 1965	Aug 2024	Natural Gas : 98.9% Distillate Fuel Oil : 1.1%
Gorge 18	Green Mountain Power Corp	South Burlington, VT	20 GWh	Dec 1927	Dec 2023	Water
Mine Falls Generating Station	City of Nashua, NH	Nashua, NH	20 GWh	Nov 1985	Dec 2023	Water
Brassua Hydroelectric Project	Brassua Hydroelectric LP	Rockwood, ME	20 GWh	Aug 1989	Dec 2023	Water
Greater New Bedford LFG Utiliz. Facility	CommonWealth New Bedford Energy LLC	New Bedford, MA	20 GWh	Sep 2005	Dec 2023	Landfill Gas
Newport	Great Bay Hydro Corp	Newport, VT	20 GWh	Dec 1935	Dec 2023	Water
Clark Falls	Green Mountain Power Corp	Milton, VT	20 GWh	Jan 1937	Dec 2023	Water
West Groton CHP	Hollingsworth & Vose Co West Groton	Groton, MA	20 GWh	Nov 2015	Dec 2023	Natural Gas
Waste Management Crossroads LFGTE	WM Renewable Energy LLC	Norridgewock, ME	20 GWh	Feb 2009	Dec 2023	Landfill Gas
UI RCP Bridgeport Seaside	United Illuminating Co	Bridgeport, CT	19 GWh	Oct 2015	Aug 2024	Natural Gas : 94.4% Solar : 5.6%
Central Power Plant	State of Rhode Island	Cranston, RI	19 GWh	Jul 1958	Aug 2024	Natural Gas
UI RCP New Haven Fuel Cell	United Illuminating Co	New Haven, CT	19 GWh	Jul 2015	Aug 2024	Natural Gas
TPE King Solar Holdings1, LLC (CSG)	Nautilus Solar Solutions	North Smithfield, RI	19 GWh	Mar 2022	Dec 2023	Solar
Jericho Power	Jericho Power LLC	Berlin, NH	19 GWh	Dec 2015	Aug 2024	Wind
Beldens	Green Mountain Power Corp	New Haven, VT	19 GWh	Jul 1913	Dec 2023	Water
Gardners Falls	Central Rivers Power MA, LLC	Buckland, MA	18 GWh	Dec 1913	Dec 2023	Water
Redbridge	Central Rivers Power MA, LLC	Wilbraham, MA	18 GWh	Dec 1925	Aug 2023	Water
Benton Falls Associates	Essex Hydro Associates LLC	Benton, ME	17 GWh	Nov 1987	Dec 2023	Water
Barrett PV	MN8 Energy LLC	Oxford, MA	17 GWh	Oct 2016	Dec 2023	Solar
Penacook Upper Falls Hydro	Briar-Hydro Associates	Penacook, NH	17 GWh	Nov 1986	Dec 2023	Water
Medtronic - New Haven 2	Bloom Energy	North Haven, CT	17 GWh	Sep 2020	Dec 2023	Natural Gas
Equinix - Billerica	Bloom Energy	Billerica, MA	17 GWh	Aug 2021	Dec 2023	Natural Gas
Pepperidge Farm Bloomfield	Pepperidge Farm, Inc.- Bloomfield	Bloomfield, CT	16 GWh	Jul 2008	Dec 2023	Natural Gas
Federal Road Solar 1, LLC CSG	Federal Road Solar 1, LLC	South Carver, MA	16 GWh	Nov 2015	Dec 2023	Solar
UI RCP Woodbridge FC	United Illuminating Co	Woodbridge, CT	16 GWh	Nov 2016	Dec 2023	Natural Gas
Errol Hydroelectric Project	Errol Hydroelectric Co LLC	Errol, NH	16 GWh	Oct 1986	Dec 2023	Water
Weybridge	Green Mountain Power Corp	Weybridge, VT	16 GWh	Jan 1951	Dec 2023	Water
Hope Farm Solar, LLC	Adapture Renewables, Inc.	Cranston, RI	16 GWh	Aug 2019	Dec 2023	Solar
Waterbury 22	Green Mountain Power Corp	Waterbury, VT	16 GWh	May 1953	Dec 2023	Water
GD Hopkinton Main I, LLC	GD Hopkinton Main I, LLC	Hopkinton, RI	16 GWh	Oct 2020	Dec 2023	Solar
Pittsfield Solar LLC	Pittsfiled Solar LLC	Pittsfield, ME	16 GWh	Nov 2017	Dec 2023	Solar
Pembroke Hydro	Eagle Creek Renewable Energy, LLC	Suncook, NH	15 GWh	Nov 1985	Dec 2023	Water
Smith College Central Heating Plant	The Trustees of Smith College	Northampton, MA	15 GWh	Sep 2008	Dec 2023	Natural Gas
Rousselot Inc	Rousselot Inc	Peabody, MA	15 GWh	Apr 1947	Nov 2023	Natural Gas
Yale New Haven - New London	Bloom Energy	New London, CT	15 GWh	Aug 2022	Dec 2023	Natural Gas
Middlesex 2	Green Mountain Power Corp	Moretown, VT	14 GWh	Dec 1927	Dec 2023	Water
Ameresco Chicopee Energy	AMERESCO Chicopee Energy LLC	Chicopee, MA	14 GWh	Jan 2004	Dec 2023	Landfill Gas
Medtronic - New Haven	Bloom Energy	North Haven, CT	14 GWh	Sep 2020	Dec 2023	Natural Gas
Turners Falls	FirstLight Power Resources, Inc. - MA	Montague, MA	14 GWh	Dec 1904	Dec 2023	Water
Nashua Plant	EPP Renewable Energy	Nashua, NH	14 GWh	Mar 1996	Dec 2023	Landfill Gas
GDIM 4, LLC	GDIM 4, LLC	North Smithfield, RI	14 GWh	Nov 2021	Dec 2023	Solar
Gregg Falls	Eagle Creek Renewable Energy, LLC	Goffstown, NH	14 GWh	Nov 1985	Dec 2023	Water
GDIM 3, LLC	GDIM 3, LLC	North Smithfield, RI	14 GWh	Nov 2021	Dec 2023	Solar
Indeck West Enfield Energy Center	Stored Solar J&WE	West Enfield, ME	13 GWh	Nov 1987	Dec 2023	Wood/Wood Waste Solids : 99.7%
GDIM 1, LLC	GDIM 1, LLC	North Smithfield, RI	13 GWh	Nov 2021	Dec 2023	Solar
One Patriot	Bloom Energy	Foxborough, MA	13 GWh	Nov 2019	Dec 2023	Natural Gas
Digital Fairfield	Bloom Energy	Trumbull, CT	13 GWh	May 2018	Dec 2023	Natural Gas
NE Renewable Whitefield, LLC	NE Renewable Whitefield, LLC	Whitefield, NH	13 GWh	Feb 1988	Dec 2023	Wood/Wood Waste Solids
Messalonskee 2 (Oakland)	Messalonskee Stream Hydro LLC	Oakland, ME	13 GWh	Dec 1923	Dec 2023	Water
Bradley Energy Center	Ameresco Select Inc	Windsor Locks, CT	13 GWh	Oct 2002	Dec 2023	Natural Gas
Goodwin Hydroelectric	Metropolitan Dist of Hartford	W. Hartland, CT	13 GWh	Mar 1986	Dec 2023	Water
Stillwater B	Brookfield Black Bear Hydro, LLC	Old Town, ME	13 GWh	Aug 2013	Dec 2023	Water
59 Federal Rd(CSG)	59FED WHAM8 Solar, LLC	Carver, MA	13 GWh	Oct 2021	Dec 2023	Solar
Jackman	Central Rivers Power NH, LLC	Hillsborough, NH	13 GWh	Jan 1926	Dec 2023	Water
GDIM 2, LLC	GDIM 2, LLC	North Smithfield, RI	13 GWh	Nov 2021	Dec 2023	Solar
Rocky River (CT)	FirstLight Power Resources Services LLC	New Milford, CT	13 GWh	Dec 1927	Aug 2024	Water
Vergennes 9	Green Mountain Power Corp	Vergennes, VT	12 GWh	Dec 1911	Dec 2023	Water
Future Generation Wind	Consolidated Edison Solutions Inc.	Plymouth, MA	12 GWh	Jul 2016	Dec 2023	Wind
Cellu Tissue	Dunn Paper East Hartford, LLC	East Hartford, CT	12 GWh	Apr 2009	Aug 2024	Natural Gas
Boston Medical Center CHP Plant	Boston Medical Center	Boston, MA	12 GWh	Mar 2017	Dec 2023	Natural Gas
Gorham	Central Rivers Power NH, LLC	Gorham, NH	12 GWh	Jul 1917	Dec 2023	Water
Bullock Road Solar 1	Bullock Road Solar 1, LLC	Freetown, MA	12 GWh	Jun 2018	Dec 2023	Solar
Stillwater Hydro Station	Brookfield Black Bear Hydro, LLC	Stillwater, ME	12 GWh	Dec 1912	Dec 2023	Water
Oakdale Power Station	Massachusetts Water Res Auth	West Boylston, MA	12 GWh	Apr 1951	Dec 2023	Water
Tunnel	FirstLight Power Resources Services LLC	Preston, CT	12 GWh	Dec 1918	Dec 2023	Water : 98.2% Jet Fuel : 1.8%
Clement Dam Hydro LLC	Eagle Creek Renewable Energy, LLC	Tilton, NH	12 GWh	Nov 1984	Dec 2023	Water
Southbridge Landfill Gas-to-Energy	Southbridge Recycling and Disposal Park	Southbridge, MA	12 GWh	Sep 2011	Dec 2023	Landfill Gas
Orono Hydro Station	Brookfield Black Bear Hydro, LLC	Orono, ME	12 GWh	Dec 2008	Dec 2023	Water
Stafford St Solar 1 CSG	Stafford St Solar 1, LLC	Leicester, MA	12 GWh	Nov 2017	Dec 2023	Solar
Carver Falls	Green Mountain Power Corp	Hampton, NY	11 GWh	Jan 1922	Dec 2023	Water
77 Farm to Market Rd Hybrid(CSG)	77F2M WHAM8 Solar, LLC	Wareham, MA	11 GWh	Nov 2021	Dec 2023	Solar
Kearsarge Smithfield LLC	Kearsarge Smithfield LLC	Burrillville, RI	11 GWh	Mar 2023	Dec 2023	Solar

Surrounding Balancing Authorities

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#61	Alcoa Power Generating, Inc. - Yadkin Division	894.0 GWh	4
#25	Dominion Energy South Carolina, Inc.	26.0 TWh	85
#13	Duke Energy Carolinas	110.9 TWh	556
#17	Duke Energy Progress East	63.3 TWh	554
#51	Duke Energy Progress West	4.1 TWh	10
#24	Louisville Gas and Electric Company and Kentucky Utilities Company	33.2 TWh	20
#12	New York Independent System Operator	130.0 TWh	1,100
#1	PJM Interconnection, LLC	843.8 TWh	2,305
#31	South Carolina Public Service Authority	17.9 TWh	33
#60	Southeastern Power Administration	1.6 TWh	11

Balancing Authorities with Similar Net Generation

Rank	Balancing Authority	Annual Net Generation	# Power Plants
#7	California Independent System Operator	191.5 TWh	1,943
#9	Tennessee Valley Authority	157.5 TWh	170
#10	Florida Power & Light Co.	147.7 TWh	159
#12	New York Independent System Operator	130.0 TWh	1,100
#13	Duke Energy Carolinas	110.9 TWh	556
#15	ISO New England	102.8 TWh	1,487
#16	Bonneville Power Administration	80.0 TWh	158
#17	Duke Energy Progress East	63.3 TWh	554
#18	Salt River Project Agricultural Improvement and Power District	59.0 TWh	45
#19	PacifiCorp East	52.6 TWh	204