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666 MW Hydro operating in Berkshire, MA
666 MW
Nameplate Capacity
2
Generators
units
Hydroelectric Pumped Storage
Technology
1974
Operating Since
Coordinates
42.6839, -72.9599
County
Berkshire, MA
Nearby Plants
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Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Bear Swamp Power Company LLC | Bear Swamp Power Co | — |
| Owner(s) | Bear Swamp Power Company LLC, Emera Inc | Brookfield Renewable Partners LP | — |
| Status | Operating | operating | — |
GEM identifies the owner as Brookfield Renewable Partners LP
This entity is not yet in the GEM ownership database — chain unavailable.
Bear Swamp Generating Station or Jack Cockwell Station is a pumped-storage hydroelectric underground power station that straddles the Deerfield River in Rowe and Florida, Massachusetts.
Read more on WikipediaBear Swamp is a 666 MW hydroelectric pumped storage power plant located in Berkshire County, Massachusetts. The plant, which began operating in 1974, is owned and operated by Bear Swamp Power Company LLC. It utilizes water as its primary fuel source and consists of two generators. Bear Swamp operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region.
The plant holds a notable position within Massachusetts, ranking as the second-largest of two hydroelectric plants in the state. Nationally, it is the 37th-largest among 194 hydroelectric plants. Financial data is available for Bear Swamp, including a power purchase agreement (PPA) price of $83.74 per MWh, as reported to FERC.
Generated from EIA, GEM, and public data sources
ISO/RTO
ISO-NE
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
ISO New England Inc. (ISNE)
Grid Voltage
115.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Monthly net generation as reported to EIA-923 — useful for historical context. Confidence varies sharply by fuel type; the band above and the “About this data” button explain the caveats specific to this plant and how InfraSure’s in-house model handles them.
−16.1K MWh
Net Charging
-154.4K MWh
Annual Net Energy
-2.6%
Capacity Factor
Positive values indicate net discharge (generation exceeds station load). Negative values indicate net charging. Pure battery storage plants are typically net negative due to round-trip efficiency losses.
Forward-looking generation outlook with probabilistic ranges across weather, demand, and policy scenarios. Powered by InfraSure's generation modeling stack.
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Historic financial signal for this asset — PPA, LCOE, market value where reported. The base for forward bankability and insurance analytics on the InfraSure platform.
Bear Swamp Power Company LLC · Data from 2019–2021
$83.7/MWh
PPA Price
Forward revenue, DSCR bands, and refinancing risk projected under price, demand, and policy scenarios. Powered by InfraSure's asset cashflow stack.
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Market Position
ISO/RTO Market
ISO-NE
LMP Node
AR.BEARSWMP13.8BSW1P
Pricing Hub
.H.INTERNAL_HUB
Location Type
NETWORK NODE
Node Source
Curated node match
No wholesale contracts disclosed in FERC EQR for this plant.
FERC EQR captures bilateral wholesale energy + capacity contracts ≥$1M/yr filed quarterly by jurisdictional sellers — covers renewable PPAs, thermal energy sales agreements, capacity contracts, and tolling agreements alike. Many plants don't appear: regulated-utility output flows to ratepayers via cost-of-service rather than bilateral contracts; small projects fall below the filing threshold; tax-equity-financed renewables route offtake to investors not utilities; merchant plants sell into ISO clearing markets without bilateral contracts. News-extracted buyer facts (below) may surface contracts disclosed only through announcements.
Last updated 2026-04-19
View all articlesForward forecasts, scenario decomposition, and risk-decision tooling for this asset.