Hadley Falls — Plant Summary
- EIA Plant ID
- 1605
- Capacity
- 33.4 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Hampden, MA
- Operating Since
- 1952
- Generators
- 2
- Operator
- City of Holyoke Gas and Electric Dept.
- Parent Company
- —
- Annual Generation
- 151,142 MWh
- Capacity Factor
- 51.6%
- Balancing Authority
- ISO New England Inc.
- ISO/RTO
- ISONE
- NERC Region
- NPCC
Hadley Falls
OperatingHydro
Ranked #4 of 31 Hydro plants in MA#382 of 1454 nationally
33.4 MW Hydro operating in Hampden, MA — ISO New England Inc.
EIAWD
33.4 MW
Nameplate Capacity
2
Generators
units
Conventional Hydroelectric
Technology
1952
Operating Since
Location
Coordinates
42.2119, -72.6036
County
Hampden, MA
Nearby Plants
- BoatlockHydro3.1 MW · 0.4 km
- Cabot HolyokeHydro2.6 MW · 1.4 km
- Riverside HolyokeHydro6.9 MW · 1.5 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | City of Holyoke Gas and Electric Dept. | — | — |
| Owner(s) | City of Holyoke Gas and Electric Dept. | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
Hadley Falls is a 33.4 MW hydroelectric power plant located in Hampden County, Massachusetts. The plant, which began operating in 1952, is owned and operated by the City of Holyoke Gas and Electric Department. It consists of two generators utilizing conventional hydroelectric technology and its primary fuel source is water (WAT). Hadley Falls is the fourth-largest hydroelectric plant in Massachusetts out of 31 such facilities, and ranks 387th nationally out of 1464.
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 for which data is available, Hadley Falls generated 151,142 MWh of electricity, achieving a capacity factor of 51.6%.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
NPCC
Balancing Authority
ISO New England Inc.
Grid Voltage
34.5 kV
Regulatory Status
RE
Entity Type
Municipal
Sector
Electric Utility
Generation
10.5K MWh
Latest Month
151.1K MWh
Annual Generation
51.6%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidenceMarket Position
ISO/RTO Market
ISO-NE
LMP Node
LD.N_CANAL 13.8
Pricing Hub
.H.INTERNAL_HUB
Node Source
Curated node match
News & Articles (10)Beta
General
George B. Hadley, Jr.
George Breadalbane Hadley, Jr., 88, died on January 20, 2026, in Mapleton, Utah of causes incident to old age. He was born on February 20, 1937 in Pirate's...
Legacy | Obituary·4 weeks ago
Industry·corporate
How UMass researchers are working to help the state reach its climate, energy goals
AMHERST — Thousands of households in Massachusetts are burdened by soaring utility bills. Some households limit use of heat in winter to...
UMass (other)Massachusetts (other)
MassLive.com·4 weeks ago
Industry·corporate
Public power shines light on prices with tour of Holyoke Gas & Electric hydro plant
Municipal electric utilities say they are already meeting or exceeding the state's goal of being 50% non-carbon by 2030.
Holyoke Gas & Electric (operator)
MassLive.com·5 months ago
Hazards·tornado
Several roads in Holyoke closed due to storm damage
Saturday's storms prompted thunderstorm and tornado warnings and left behind damage in several western Massachusetts communities.
Western Mass News·6 months ago
Last updated 2026-03-14
View all 10 articles