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563.9 MW Natural Gas operating in Cumberland, ME — ISO New England Inc.
563.9 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combined Cycle
Technology
2001
Operating Since
Coordinates
43.6575, -70.3750
County
Cumberland, ME
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Westbrook Energy Center | Westbrook Energy Center | — |
| Owner(s) | Westbrook Energy Center | Constellation Energy | — |
| Status | Operating | — | — |
Westbrook Energy Center Power Plant is a 563.9 MW natural gas-fired combined cycle power plant located in Cumberland County, Maine. The plant began operating in 2001 and is owned and operated by Constellation Energy, under the name Westbrook Energy Center. It consists of three generators utilizing combined cycle technology. The plant is the largest of five power plants in the state of Maine, and ranks 437th 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, Westbrook Energy Center generated 3,387,942 MWh of electricity, achieving a capacity factor of 68.5%.
Generated from EIA, GEM, and public data sources
ISO/RTO
ISO-NE
Market
ISO/RTO Member
NERC Region
NPCC — Northeast Power Coordinating Council
Balancing Authority
ISO New England Inc. (ISNE)
Grid Voltage
118.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
385.2K MWh
Latest Month
3.4M MWh
Annual Generation
68.5%
Capacity Factor
CO₂ Intensity
812 lb/MWh
NOx
0.098 lb/MWh
SO₂
0.004 lb/MWh
CH₄
0.016 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
47.7%
Annual Net Gen
2357 GWh
CO₂eq
813 lb/MWh
Subregion
NPCC New England
2013
$965/kW
Est. Construction Cost
Total estimated cost: $544.2M
Point of Interconnection
Nearest Substation
Westbrook Substation · 115 kV
Substation Distance
< 10 km
Operator
Central Maine Power Company
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ISO-NE
LMP Node
WESTBRK
Pricing Hub
.Z.MAINE
Node Source
EIA-860 direct report
Last updated 2026-04-09
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