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Power plant · Hydro

Key facts

Power plant · Hydro Operating

Capacity: Capacity: sourceEIA-860M · Nov 4, 2026Open licenseMW

Commissioned: 1974
Net generation, 2025: 0 MWh
Grid: 115 kV to Public Service Co of NH (ISNE)
Location: Berkshire County, Massachusetts
Operated by: Bear Swamp Power Company LLC

Output

Net generation MWh by year, 2001 to 2025

Operations detail

Details

Who’s behind it

Owner: Bear Swamp Power Company LLC, Emera Inc

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Technology: Hydro source: “Conventional Hydroelectric”
Age: 52 years since 1974

All 4 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory

Attributes
Attribute	Value
Grid	Nerc region NPCC Report year 2025 Grid voltage kv 115 Transmission owner Public Service Co of NH Balancing authority code ISNE Balancing authority name ISO New England Inc.
Fuel burned (MMBtu), 2025	0
Net generation (MWh), 2025	0
Balancing authority code	ISNE

Data notes (1)

Capacity factor, 2025 not shown: net generation 0.0 MWh is not positive (the plant consumed at least as much as it produced over the year)

Ownership

2 companies

Companies with an ownership or operating interest in this asset.
Company	Role	Share	As of	Source
Bear Swamp Power Company LLC	Operator			EIA-860M
Bear Swamp Power Company LLC	Owner	50.0%	Dec 31, 2025	EIA-860
Emera Inc	Owner	50.0%	Dec 31, 2025	EIA-860

Timeline

1974 In service · EIA-860M

Sources

4 sources

Sources EIA-860M · EIA · EIA-860M Preliminary Monthly Electric Generator Inventory · EIA-860 Annual Electric Generator Report — Schedule 4 Owner (ownership shares per generator), plus Plant/Generator schedules

Sources

EIA-860MOpen license · retrieved Nov 4, 2026
EIAOpen license · retrieved Nov 1, 2026Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
EIA-860M Preliminary Monthly Electric Generator Inventory
EIA-860 Annual Electric Generator Report — Schedule 4 Owner (ownership shares per generator), plus Plant/Generator schedules

Every source and license · Attribution

Around this plant

Nearby

Projects within 15 mi, nearest first.
Project	Kind	Away	MW
Williams College - Campus CHP Postponed	Oil	11.5 mi	3.2

Sources EIA-860M

Sources

EIA-860MOpen license · retrieved Nov 4, 2026