Stevenson — Plant Summary
- EIA Plant ID
- 553
- Capacity
- 30.5 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- Fairfield, CT
- Operating Since
- 1919
- Generators
- 4
- Operator
- FirstLight Power Resources Services LLC
- Parent Company
- —
- Annual Generation
- 95,790 MWh
- Capacity Factor
- 35.8%
- Balancing Authority
- ISO New England Inc.
- ISO/RTO
- ISONE
- NERC Region
- NPCC
Stevenson
OperatingHydro
Ranked #3 of 13 Hydro plants in CT#399 of 1454 nationally
30.5 MW Hydro operating in Fairfield, CT — ISO New England Inc.
EIAWD
30.5 MW
Nameplate Capacity
4
Generators
units
Conventional Hydroelectric
Technology
1919
Operating Since
Location
Coordinates
41.3833, -73.1714
County
Fairfield, CT
Nearby Plants
- Kinneytown New OldHydro2.3 MW · 7.3 km
- Derby HydroHydro8.6 MW · 8.7 km
- Derby Fuel CellNatural Gas14 MW · 8.9 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | FirstLight Power Resources Services LLC | — | — |
| Owner(s) | FirstLight Hydro Generating Company | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
The Stevenson Dam Hydroelectric Plant is a hydroelectric power plant located on the Housatonic River at the boundary between the towns of Monroe and Oxford, Connecticut. The Connecticut Light and Power Company began construction in 1917 and FirstLight Power has since gained ownership. It was listed on the National Register of Historic Places in 2000 and is considered to have high hazard potential by the National Inventory of Dams. The site includes three contributing structures: the Stevenson Dam, the Stevenson Dam Bridge, and the Stevenson Powerhouse.
Read more on WikipediaThe Stevenson hydroelectric plant is located in Fairfield County, Connecticut. The plant, which began operating in 1919, has a total capacity of 30.5 MW across four generators. It is owned and operated by FirstLight Power Resources Services LLC. The plant utilizes conventional hydroelectric technology and its primary fuel source is water (WAT).
Stevenson is the third-largest hydroelectric plant in Connecticut (out of 14) and ranks 404th nationally (out of 1464). In the most recent year with available data, the plant generated 95,790 MWh, achieving a capacity factor of 35.8%. The plant operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
NPCC
Balancing Authority
ISO New England Inc.
Grid Voltage
115 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
6.3K MWh
Latest Month
95.8K MWh
Annual Generation
35.8%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Stevenson Substation · 115 kV
Substation Distance
0.106 km
Operator
Eversource
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
UN.STEVENSN6.9 STEV
Pricing Hub
.Z.CONNECTICUT
Node Source
Curated node match
News & Articles (10)Beta
Industry·corporate
The Man Behind The Fall Of Offshore Wind
David Stevenson has solar on his roof and drives a hybrid. How did he become the leader of the movement that helped Trump crush offshore...
David Stevenson (other)Trump (other)
CT News Junkie·3 months ago
Hazards·flooding
Enter at your own risk. CT officials warn of life-threatening dangers involved in swimming in rivers
Officials say water conditions can change quickly based on rainfall, dam activity, temperature changes and other factors.
CT (regulator)
Hartford Courant·8 months ago
Hazards·flooding
How CT towns and agencies are responding after Housatonic River drownings in banned swimming areas
The towns of New Milford and Monroe are hoping to raise awareness of the hazards of swimming in the Housatonic River after two drownings in...
New Milford (other)Monroe (other)
CT Insider·8 months ago
Hazards·flooding
Police: 31-year-old Monroe man pulled from Housatonic River after going over Stevenson Dam
Monroe police say they received a call around 3:30 p.m. about a person in distress in the water below the dam.
Monroe (other)Housatonic River (other)
News12 | Westchester·8 months ago
Last updated 2026-03-14
View all 10 articles