Rocky River (CT) — Plant Summary
- EIA Plant ID
- 539
- Capacity
- 31 MW
- Primary Fuel
- Hydro
- Technology
- Hydroelectric Pumped Storage
- Status
- Operating
- Location
- Litchfield, CT
- Operating Since
- 1928
- Generators
- 3
- Operator
- FirstLight Power Resources Services LLC
- Parent Company
- —
- Annual Generation
- -2,448 MWh
- Capacity Factor
- -0.9%
- Balancing Authority
- ISO New England Inc.
- ISO/RTO
- ISONE
- NERC Region
- NPCC
Rocky River (CT)
OperatingHydro
Ranked #2 of 13 Hydro plants in CT#397 of 1454 nationally
31 MW Hydro operating in Litchfield, CT — ISO New England Inc.
EIAWD
31 MW
Nameplate Capacity
3
Generators
units
Hydroelectric Pumped Storage
Technology
1928
Operating Since
Location
Coordinates
41.5826, -73.4347
County
Litchfield, CT
Nearby Plants
- Kimberly Clark-Unit 1,2,3Natural Gas36.3 MW · 3.2 km
- New Milford Gas RecoveryLandfill Gas1.6 MW · 4.0 km
- Bulls BridgeHydro7.2 MW · 9.7 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
Rocky River is a hydroelectric pumped storage power plant located in Litchfield County, Connecticut. The plant has a total capacity of 31 MW across three generators. It began operating in 1928 and is owned and operated by FirstLight Power Resources Services LLC. The plant utilizes water as its primary fuel source.
Rocky River operates within the ISO New England Inc. balancing authority and the Northeast Power Coordinating Council (NPCC) NERC region. It is the second-largest of 14 hydroelectric plants in Connecticut, and ranks 402nd out of 1464 hydroelectric plants nationally.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
NPCC
Balancing Authority
ISO New England Inc.
Grid Voltage
13.8 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
1.3K MWh
Net Discharge
-2.4K MWh
Annual Net Energy
-0.9%
Capacity Factor
Jan 2023 – Dec 2025
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.
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Rocky River Substation · 115 kV
Substation Distance
0.054 km
Operator
Eversource
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
LD.ROCKY_RV13.8
Pricing Hub
.Z.CONNECTICUT
Node Source
Curated node match
News & Articles (10)Beta
General
Woman rescued from SUV that went into Connecticut River in Rocky Hill
Emergency crews responded to Ferry Park in Rocky Hill just after 11 a.m. on Monday for a report of a vehicle in the Connecticut River.
NBC Connecticut·2 days ago
General
Woman rescued from SUV that went into Connecticut River in Rocky Hill
Crews were able to break a window and pull the woman to safety after about 10 minutes, according to fire officials.
NBC Connecticut·2 days ago
General
Candlewood Lake to be drawn down further due to power demand from cold snap, FirstLight says
Candlewood Lake in New Milford will be drawn down further than originally planned to meet rising power demand during the cold snap across...
News-Times·4 weeks ago
General
Hartford, CT Children’s to plant 200 new trees in the city
A Hartford neighborhood can look forward to some new scenery following a new partnership between the city and Connecticut Children's.
WTNH.com·4 months ago
Last updated 2026-03-26
View all 10 articles