Maine Independence Station — Plant Summary
- EIA Plant ID
- 55068
- Capacity
- 550.2 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combined Cycle
- Status
- Operating
- Location
- Penobscot, ME
- Operating Since
- 2000
- Generators
- 3
- Operator
- Casco Bay Energy Co LLC
- Parent Company
- Vistra
- Annual Generation
- 2,546,844 MWh
- Capacity Factor
- 52.7%
- Balancing Authority
- ISO New England Inc.
- ISO/RTO
- ISONE
- NERC Region
- NPCC
Maine Independence Station
OperatingNatural Gas
Ranked #2 of 6 Natural Gas plants in ME#448 of 2009 nationally
550.2 MW Natural Gas operating in Penobscot, ME — ISO New England Inc.
EIAWD
550.2 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combined Cycle
Technology
2000
Operating Since
Location
Coordinates
44.8242, -68.7094
County
Penobscot, ME
Nearby Plants
- ME CDG 005Solar2 MW · 2.0 km
- Brewer (CSG)Solar5 MW · 3.0 km
- Eastern Maine Medical CenterNatural Gas3.8 MW · 3.7 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Casco Bay Energy Co LLC | Casco Bay Energy | — |
| Owner(s) | Casco Bay Energy Co LLC | Vistra | — |
| Status | Operating | — | — |
Ownership Chain
About
Maine Independence Station is a 550.2 MW natural gas-fired combined cycle power plant located in Penobscot County, Maine. The plant began operating in 2000 and consists of three generators. It is owned by Vistra and operated by Casco Bay Energy Co LLC. The plant is the second-largest of five active power plants in the state, and ranks 453rd out of 945 plants nationally.
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 of data, Maine Independence Station generated 2,546,844 MWh of electricity, achieving a capacity factor of 52.7%.
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
142.1K MWh
Latest Month
2.5M MWh
Annual Generation
52.7%
Capacity Factor
Jan 2022 – Dec 2024
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Graham 46kV Substation · 46 kV
Substation Distance
< 10 km
Operator
Bangor Hydro-Electric Company
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
UN.Graham 18.0MS1A(40338)
Pricing Hub
.Z.MAINE
Node Source
EIA-860 direct report
News & Articles (10)Beta
General
Year in Review: Debate over battery energy storage safety persists in Santa Cruz County
On Jan. 16, a battery energy storage system run by Texas-based energy company Vistra in Moss Landing caught fire.
Santa Cruz Sentinel·2 months ago
General
Vistra to Acquire 2.6 GW Gas Fleet for $1.9B, Citing Surging U.S. Power Demand
Vistra Corp. has agreed to acquire seven natural gas power plants totaling 2557 MW from Lotus Infrastructure Partners for $1.9 billion,...
POWER Magazine·10 months ago
General
Vistra withdraws application to build battery plant in Morro Bay. What’s next?
Vistra Corp. has withdrawn its application to build a 600-megawatt battery energy storage facility on the retired Morro Bay Power Plant property.
San Luis Obispo Tribune·11 months ago
General
Vistra withdraws battery storage application, to seek state approval
Vistra, a Texas-based energy company, has plans to construct and operate a 600-megawatt battery storage facility on approximately 24 acres of a roughly 70-acre...
Cal Coast News·11 months ago
Last updated 2026-03-26
View all 10 articles