Diamond Island Plant

Water Street, Watertown, NY 13601

Plant Summary Information

Diamond Island Plant is ranked #144 out of 148 hydroelectric power plants in New York in terms of total annual net electricity generation.

Diamond Island Plant is comprised of 3 generators and generated 481.0 MWh during the 3-month period between September 2025 to December 2025.

Plant Name	Diamond Island Plant
Utility Name	Energen Renewables, LLC
Location	Jefferson County, NY
Initial Operation Date	January 1914
Last Update	Dec 2025
Annual Generation	1.8 GWh
Annual Consumption	7.1 k MMBtu
Ranked #11,134 out of 13,081 Power Plants Nationwide
Ranked #1,247 out of 1,311 Water Power Plants Nationwide
Ranked #910 out of 1,045 New York Power Plants
Ranked #144 out of 148 New York Water Power Plants
Fuel Types	Water
Previous Operators	CHI Energy Inc (2013 to 2019) Central Rivers Power US, LLC (2020 to 2024) Energen Renewables, LLC (2025 to 2025)

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Summary Information
Plant Name	Diamond Island Plant (10540)
Plant Address	Water Street, Watertown, NY 13601
Utility	Energen Renewables, LLC (67561)
Latitude, Longitude	43.97863, -75.8861
Generation Dates on File	Jan 2001 to Dec 2025
Initial Operation Date	January 1914
Annual Generation	1.8 GWh
Fuel Types	Water

Federal Energy Regulatory Commission (FERC) Information
FERC Cogeneration Status	No
FERC Small Power Producer Status	No
FERC Exempt Wholesale Generator Status	No

Regulatory Information
Regulatory Status	Non-Regulated
NERC Region	NPCC
Balancing Authority	New York Independent System Operator (NYIS)
NAICS Code	Utilities (22)
Sector	IPP Non-CHP (2)
Water Source	Black River
Ash Impoundment
Transmission / Distribution Owner	Niagara Mohawk Power Corp. (13573) NY
Grid Voltage	24.00 kV
Energy Storage	No

* Data obtained from the 2025 EIA 860 Report

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
Nameplate Capacity	0.4 MW
Nameplate Power Factor	1
Summer Capacity	0.4 MW
Winter Capacity	0.4 MW
Minimum Load	0.1 MW
Uprate/Derate Completed	No
Status	Operating

First Operation Date	January 1914
Combined Heat & Power	No
Sector Name	IPP Non-CHP (2)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	1H
Other Planned Modifications	No
Multiple Fuels	No

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
Nameplate Capacity	0.4 MW
Nameplate Power Factor	1
Summer Capacity	0.4 MW
Winter Capacity	0.4 MW
Minimum Load	0.1 MW
Uprate/Derate Completed	No
Status	Operating

First Operation Date	January 1914
Combined Heat & Power	No
Sector Name	IPP Non-CHP (2)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	1H
Other Planned Modifications	No
Multiple Fuels	No

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
Nameplate Capacity	0.4 MW
Nameplate Power Factor	1
Summer Capacity	0.4 MW
Winter Capacity	0.4 MW
Minimum Load	0.1 MW
Uprate/Derate Completed	No
Status	Operating

First Operation Date	January 1914
Combined Heat & Power	No
Sector Name	IPP Non-CHP (2)
Energy Source	Water
Solid Fuel Gasification	No
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	1H
Other Planned Modifications	No
Multiple Fuels	No

Owner Name	Address	Generator	Ownership
*We couldn't locate any owners for this plant*

Power plants with a similar annual net generation from Water.

Rank	Plant Name	Plant Location	Annual Generation
#1237	Puueo	Hilo, HI	2.0 GWh
#1238	Kings Falls Hydroelectric	Copenhagen, NY	2.0 GWh
#1239	Tacoma	Durango, CO	1.9 GWh
#1240	Tenth Street	Norwich, CT	1.9 GWh
#1241	Graniteville Enterprise Division	Augusta, GA	1.9 GWh
#1242	Fontana	Rialto, CA	1.9 GWh
#1243	Mechanic Falls	Mechanic Falls, ME	1.9 GWh
#1244	Chasm Hydro Partnership	Chateaugay, NY	1.9 GWh
#1245	Great Falls (VT)	Lyndon, VT	1.9 GWh
#1246	Timothy Lake Powerhouse	Estacada, OR	1.9 GWh
#1248	Granite Falls	Granite Falls, MN	1.8 GWh
#1249	Kosterville	Lyonsdale, NY	1.8 GWh
#1250	Smith (VT)	Bradford, VT	1.8 GWh
#1251	Indian River Hydro	Russell, MA	1.8 GWh
#1252	Skookumchuck	Tenino, WA	1.8 GWh
#1253	Toadtown	Magalia, CA	1.8 GWh
#1254	Blackstone/Tupperware	North Smithfield, RI	1.8 GWh
#1255	Site 980 65	Madera, CA	1.8 GWh
#1256	Ada Dam	Ada, MI	1.7 GWh
#1257	Deweys Mill	White River Jct., VT	1.7 GWh

Below are closest 20 power plants surrounding Diamond Island Plant.

Plant Name	Plant Location	Annual Generation	Distance
Beebee Island Hydro Plant	Watertown, NY	40.1 GWh	1.1 mi
Black River	Black River, NY	32.5 GWh	3.9 mi
Carthage A	Carthage, NY	7.6 GWh	11.2 mi
Carthage B	Carthage, NY	5.3 GWh	11.2 mi
Copenhagen Plant	Copenhagen, NY	7.0 GWh	12.5 mi
Copenhagen Solar	Copenhagen, NY	5.1 GWh	11.5 mi
Copenhagen Wind Farm	Copenhagen, NY	250.2 GWh	10.4 mi
DANC LFGTE Facility	Rodman, NY	25.5 GWh	11.1 mi
Deferiet	Deferiet, NY	40.2 GWh	11 mi
Dexter Plant	Dexter, NY	6.9 GWh	7.9 mi
FFP - NY Game Farm CSG	Dexter, NY	901.0 MWh	6.5 mi
Glen Park Hydroelectric Project	Watertown, NY	72.4 GWh	4 mi
Herrings	Carthage, NY	18.4 GWh	12.1 mi
Jefferson-Lewis BOCES Solar	Watertown, NY	2.6 GWh	4.2 mi
Kamargo	Black River, NY	21.3 GWh	5 mi
Mereand CSG	Watertown, NY	3.3 GWh	5.1 mi
OYA Wayside Drive	Watertown, NY	10.4 GWh	3.2 mi
Sewalls	Watertown, NY	11.7 GWh	0.4 mi
St. Lawrence University - Sutton	Watertown, NY	2.4 GWh	3.3 mi
Watertown	Watertown, NY	19.2 GWh	0.6 mi