Deerfield 5 — Plant Summary
- EIA Plant ID
- 1620
- Capacity
- 17.5 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Berkshire, MA
- Operating Since
- 1974
- Generators
- 1
- Operator
- Great River Hydro, LLC
- Parent Company
- —
- Annual Generation
- 42,089 MWh
- Capacity Factor
- 27.4%
- Balancing Authority
- ISO New England Inc.
- ISO/RTO
- ISONE
- NERC Region
- NPCC
Deerfield 5
OperatingHydro
Ranked #7 of 31 Hydro plants in MA#510 of 1454 nationally
17.5 MW Hydro operating in Berkshire, MA — ISO New England Inc.
EIAGEMWD
17.5 MW
Nameplate Capacity
1
Generators
unit
Conventional Hydroelectric
Technology
1974
Operating Since
Location
Coordinates
42.6911, -72.9561
County
Berkshire, MA
Nearby Plants
- Bear SwampHydro666 MW · 0.9 km
- Fife BrookHydro11.2 MW · 1.9 km
- ShermanHydro7.2 MW · 4.8 km
Ownership & Operator
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 | Great River Hydro, LLC | Bear Swamp Power Co | — |
| Owner(s) | Great River Hydro, LLC | Brookfield Renewable Partners LP [100%] | — |
| Status | Operating | operating | — |
Ownership Chain
GEM identifies the owner as Brookfield Renewable Partners LP [100%]
This entity is not yet in the GEM ownership database — chain unavailable.
About
Deerfield 5 is a 17.5 MW conventional hydroelectric power plant located in Berkshire County, Massachusetts. The plant began operating in 1974 and has one generator. Great River Hydro, LLC is the owner and operator. Deerfield 5 utilizes water as its primary fuel source. It ranks as the 7th largest hydroelectric plant in Massachusetts out of 31, and 519th nationally out of 1464 similar facilities.
The plant operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region. In the most recent year with available data, Deerfield 5 generated 42,089 MWh of electricity, achieving a capacity factor of 27.4%. Financial data indicates that the plant has a power purchase agreement (PPA) price of $60 per MWh, as reported to FERC.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
NPCC
Balancing Authority
ISO New England Inc.
Grid Voltage
69 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
4.5K MWh
Latest Month
42.1K MWh
Annual Generation
27.4%
Capacity Factor
Jan 2022 – Dec 2024
Financial DataBeta
Source: FERC Electric Quarterly ReportsMEDIUM
$60.0/MWh
PPA Price
Great River Hydro, LLC
Contract Seller
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Deerfield No. 5 Substation · 69 kV
Substation Distance
< 10 km
Operator
National Grid
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
393
Pricing Hub
.H.INTERNAL_HUB
Node Source
EIA-860 direct report
News & Articles (10)Beta
Regulatory·ferc order
Great River Hydro, LLC; Notice of Availability of Environmental Assessment
Great River Hydro (other)
Federal Register (FERC)·3 weeks ago
Hazards·other
Friend of family speaks out after fatal Deerfield Crash
HATFIELD, MA (WGGB/WSHM) - A car crash on Sunday taking the life of 17-year-old Joshua Mizula-Samson. Western Mass News with a friend close...
Western Mass News·7 months ago
General
Man stole Windsor fire vehicle and tried to stop vehicles on I-91 in Mass.: police
Police are investigating after a man stole a fire department vehicle and several tools from a firehouse in Windsor, Conn., started a small fire in the garage.
NBC Connecticut·1 years ago
General
4 people seriously injured in Deerfield crash
DEERFIELD, MA (WGGB/WSHM) – Four people were injured after a serious two-car crash on Routes 5 and 10 in Franklin County on Wednesday.
Western Mass News·1 years ago
Last updated 2026-03-25
View all 10 articles