Ayers Island

59 Ayers Island Rd., Bristol, NH 3222

Plant Summary Information

Ayers Island is ranked #24 out of 57 power plants in New Hampshire in terms of total annual net electricity generation.

Ayers Island is comprised of 3 generators and generated 8.3 GWh during the 3-month period between September 2025 to December 2025.

Plant Name	Ayers Island
Utility Name	Central Rivers Power NH, LLC
Location	Grafton County, NH
Initial Operation Date	August 1925
Last Update	Dec 2025
Annual Generation	36.3 GWh
Annual Consumption	135.4 k MMBtu
Ranked #4,605 out of 13,081 Power Plants Nationwide
Ranked #552 out of 1,311 Water Power Plants Nationwide
Ranked #24 out of 57 New Hampshire Power Plants
Ranked #7 out of 32 New Hampshire Water Power Plants
Fuel Types	Water
Previous Operator	Public Service Co of NH (2013 to 2017) Central Rivers Power NH, LLC (2018 to 2025)

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Summary Information
Plant Name	Ayers Island (2355)
Plant Address	59 Ayers Island Rd., Bristol, NH 3222
Utility	Central Rivers Power NH, LLC (62775)
Latitude, Longitude	43.59785, -71.71768
Generation Dates on File	Jan 2001 to Dec 2025
Initial Operation Date	August 1925
Annual Generation	36.3 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	ISO New England Inc. (ISNE)
NAICS Code	Utilities (22)
Sector	IPP Non-CHP (2)
Water Source	Pemigewasset River
Ash Impoundment	No
Transmission / Distribution Owner	Public Service Co of NH (15472) NH
Grid Voltage	34.50 kV
Energy Storage	No

* Data obtained from the 2025 EIA 860 Report

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
RTO ISO LMP Node Designation	4002 Z_NewHampshire
Nameplate Capacity	2.8 MW
Nameplate Power Factor	0.8
Summer Capacity	2.8 MW
Winter Capacity	3 MW
Minimum Load	0.5 MW

Uprate/Derate Completed	No
Status	Operating
First Operation Date	August 1925
Combined Heat & Power	No
Sector Name	IPP Non-CHP (2)
Energy Source	Water
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
Multiple Fuels	No

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
Nameplate Capacity	2.8 MW
Nameplate Power Factor	0.8
Summer Capacity	2.8 MW
Winter Capacity	3 MW
Minimum Load	0.5 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	August 1925
Combined Heat & Power	No
Sector Name	IPP Non-CHP (2)
Energy Source	Water
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
Multiple Fuels	No

Technology	Conventional Hydroelectric
Prime Mover	Hydroelectric Turbine
Ownership	Single Owner
Nameplate Capacity	2.8 MW
Nameplate Power Factor	0.8
Summer Capacity	2.8 MW
Winter Capacity	3 MW
Minimum Load	0.5 MW
Uprate/Derate Completed	No

Status	Operating
First Operation Date	August 1925
Combined Heat & Power	No
Sector Name	IPP Non-CHP (2)
Energy Source	Water
Carbon Capture Technology	No
Time From Cold Shutdown To Full Load	10M
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
#542	Foothill	Sylmar, CA	37.1 GWh
#543	Twin Falls (WI)	Florence, WI	37.0 GWh
#544	Rollins	Colfax, CA	36.9 GWh
#545	Dells	Eau Claire, WI	36.9 GWh
#546	Granite Shoals	Marble Falls, TX	36.8 GWh
#547	Port Edwards Mill	Port Edwards, WI	36.8 GWh
#548	Hydro Kennebec Project	Winslow, ME	36.8 GWh
#549	Stewart Mountain	Phoenix, AZ	36.6 GWh
#550	Marys Lake	Estes Park, CO	36.5 GWh
#551	Du Bay	Eau Pleine, WI	36.5 GWh
#553	Milford Hydro Station	Milford, ME	35.9 GWh
#554	Bishop Creek 4	Bishop, CA	35.8 GWh
#555	Allegheny No 6 Hydro Station	Ford City, PA	35.6 GWh
#556	Gay Robinson	Kaumakani, HI	35.6 GWh
#557	Allegheny No. 5 Hydro Station	Schenley, PA	35.4 GWh
#558	Yonah	Toccoa, GA	35.4 GWh
#559	Moshier	Lowville, NY	35.1 GWh
#560	Grand Rapids	Ingalls, MI	35.1 GWh
#561	Clearwater 1	Idleyld Park, OR	35.0 GWh
#562	Brookfield Power Glen Falls Hydro	Glen Falls, NY	34.9 GWh

Below are closest 20 power plants surrounding Ayers Island.

Plant Name	Plant Location	Annual Generation	Distance
Bridgewater Power LP	Bridgewater, NH	103.0 GWh	8.7 mi
Clement Dam Hydro LLC	Tilton, NH	7.1 GWh	12.5 mi
Dartmouth College Heating Plant	Hanover, NH	10.6 GWh	29.3 mi
Eastman Falls	Franklin, NH	21.9 GWh	10.8 mi
EHC West Hopkinton	West Hopkinton, NH	1.2 GWh	28.2 mi
Garvins Falls	Bow, NH	24.8 GWh	31.6 mi
Groton Wind LLC	Groton, NH	101.4 GWh	12.8 mi
Lochmere Hydroelectric Plant	Tilton, NH	2.1 GWh	12.6 mi
Mascoma Hydro	W. Lebanon, NH	202.0 MWh	30.1 mi
NE Renewable Springfield, LLC	Springfield, NH	73.3 GWh	20 mi
NE Renewable Tamworth, LLC	Tamworth, NH	77.8 GWh	30.8 mi
Newfound Hydroelectric	Bristol, NH	3.8 GWh	0.9 mi
Ottauquechee Hydro	N. Hartland, VT	2.8 GWh	31.7 mi
Penacook Lower Falls	Boscawen, NH	16.1 GWh	22.4 mi
Penacook Upper Falls Hydro	Penacook, NH	11.1 GWh	22.5 mi
Rolfe Canal Hydro	Penacook, NH	16.3 GWh	23.1 mi
Stevens Mills Dam	Franklin, NH	3.6 GWh	11.1 mi
Wheelabrator Concord Facility	Concord, NH	93.5 GWh	22.6 mi
White Lake	Tamworth, NH	484.0 MWh	30.8 mi
Wilder	Hartford, VT	134.4 GWh	29.7 mi