Tunnel — Plant Summary
- EIA Plant ID
- 557
- Capacity
- 20.5 MW
- Primary Fuel
- JF
- Technology
- Conventional Hydroelectric, Petroleum Liquids
- Status
- Operating
- Location
- New London, CT
- Operating Since
- 1919
- Generators
- 3
- Operator
- FirstLight Power Resources Services LLC
- Parent Company
- —
- Annual Generation
- 7,722 MWh
- Capacity Factor
- 4.3%
- Balancing Authority
- ISO New England Inc.
- ISO/RTO
- ISONE
- NERC Region
- NPCC
Tunnel
OperatingJet FuelHydroHybrid
Ranked #1 of 1 Jet Fuel plants in CT#2 of 4 nationally
20.5 MW Conventional Hydroelectric (2 MW) + Petroleum Liquids (19 MW) operating in New London, CT — ISO New England Inc.
EIAWD
20.5 MW
Nameplate Capacity
3
Generators
units
Hybrid (2)
Technology
Conventional Hydroelectric + Petroleum Liquids
1919
Operating Since
Location
Coordinates
41.5555, -72.0425
County
New London, CT
Nearby Plants
- TaftvilleHydro1.6 MW · 1.9 km
- Tenth StreetHydro1.4 MW · 2.0 km
- Wheelabrator LisbonMuni. Waste14.6 MW · 3.2 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 Tunnel power plant, located in New London County, Connecticut, is a hybrid facility utilizing both conventional hydroelectric and petroleum liquid technologies. It has a total capacity of 20.5 MW distributed across 3 generators. The plant began operating in 1919 and is owned and operated by FirstLight Power Resources Services LLC. Tunnel is ranked as the 4th largest of 14 hydroelectric plants in Connecticut, and 480th nationally out of 1464 similar facilities.
Tunnel's primary fuel source is water (WAT). In the most recent year of reported data, the plant generated 7,722 MWh, resulting in a capacity factor of 4.3%. 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
23 kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
329 MWh
Latest Month
7.7K MWh
Annual Generation
4.3%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Tunnel Substation · 115 kV
Substation Distance
0.086 km
Operator
Eversource
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
UN.TUNNEL 23 TUNN
Pricing Hub
.Z.CONNECTICUT
Node Source
Curated node match
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