Shepaug — Plant Summary
- EIA Plant ID
- 552
- Capacity
- 37.2 MW
- Primary Fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Status
- Operating
- Location
- New Haven, CT
- Operating Since
- 1955
- Generators
- 1
- Operator
- FirstLight Power Resources Services LLC
- Parent Company
- —
- Annual Generation
- 116,629 MWh
- Capacity Factor
- 35.7%
- Balancing Authority
- ISO New England Inc.
- ISO/RTO
- ISONE
- NERC Region
- NPCC
Shepaug
OperatingHydro
Ranked #1 of 13 Hydro plants in CT#367 of 1454 nationally
37.2 MW Hydro operating in New Haven, CT — ISO New England Inc.
EIAWD
37.2 MW
Nameplate Capacity
1
Generators
unit
Conventional Hydroelectric
Technology
1955
Operating Since
Location
Coordinates
41.4484, -73.2953
County
New Haven, CT
Nearby Plants
- StevensonHydro30.5 MW · 12.6 km
- TRS Fuel CellNatural Gas3.7 MW · 13.3 km
- Danbury Hospital Cogen PlantNatural Gas4.3 MW · 13.6 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 Shepaug hydroelectric plant is located in New Haven County, Connecticut. It began operating in 1955 and has a total capacity of 37.2 MW from a single generator. The plant is owned and operated by FirstLight Power Resources Services LLC. Shepaug utilizes conventional hydroelectric technology with water (WAT) as its primary fuel source.
Shepaug is the largest of 14 hydroelectric plants in Connecticut, and ranks 372nd out of 1464 nationally. The plant operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region. In the latest year of reported data, Shepaug generated 116,629 MWh, achieving a capacity factor of 35.7%.
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
7.9K MWh
Latest Month
116.6K MWh
Annual Generation
35.7%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Shepaug Substation · 115 kV
Substation Distance
0.092 km
Operator
Eversource
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
LD.SHEPAUG 69
Pricing Hub
.Z.CONNECTICUT
Node Source
Curated node match
News & Articles (10)Beta
Industry·other
Where to see bald eagles in Connecticut this month
The Bald Eagle is an American Phoenix, having risen from near extinction in 1950s and cresting to a population that now ranges between 150...
Connecticut (other)
CT Insider·1 years ago
General
A CT observatory with views of a prime bald eagle wintering site is open again
Bald eagles and other birds of prey spend their winters near the Shepaug Hydro Generating Station, feeding on fish in the Housatonic River.
News-Times·1 years ago
General
A CT observatory with views of a prime bald eagle wintering site is open again
Bald eagles and other birds of prey spend their winters near the Shepaug Hydro Generating Station, feeding on fish in the Housatonic River.
News-Times·1 years ago
General
A CT observatory with views of a prime bald eagle wintering site is open again
Bald eagles and other birds of prey spend their winters near the Shepaug Hydro Generating Station, feeding on fish in the Housatonic River.
News-Times·1 years ago
Last updated 2026-03-26
View all 10 articles