Millennium Power

Power plant · Gas, combined cycle

Key facts

Power plant · Gas, combined cycle Operating

Commissioned: 2001
Net generation, 2025: 852,182 MWh
Grid: 115 kV to New England Power Company (ISNE)
Location: Worcester County, Massachusetts
Operated by: Millennium Power CO LLCSourceEIA-860M Preliminary Monthly Electric Generator Inventory

Net generation MWh by year, 2001 to 2026

Fuel burned MMBtu by year, 2001 to 2026

Owner: Millennium Power CO LLCSource100.0%, EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT), as of Dec 31, 2023

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Technology: Gas, combined cycle source: “Natural Gas Fired Combined Cycle”
Age: 25 years since 2001
Unused energy: 2,893 GWh 2025Unused energyA lead, not a guarantee: MW × hours × (1 − capacity factor) for the latest year (EIA-923), gas, coal and oil plants only. Air-permit run-hour caps, heat rate (cost to run) and capacity-market or reliability obligations can rule it out.
Heat rate: 7,495 Btu/kWh 2025

All 8 attributes from EIA-860M Preliminary Monthly Electric Generator Inventory

Attributes
Attribute	Value
Gem	Parents Name Gate City Power PLG Holdings LLC Share pct 100 Gem entity id E100002024973 Unit ids G100000401793 Location id L100000402092 Eia plant ids 55079
Grid	Nerc region NPCC Report year 2025 Grid voltage kv 115 Transmission owner New England Power Company Balancing authority code ISNE Balancing authority name ISO New England Inc.
EPA greenhouse gas reporting (GHGRP)	EPA FRS ID 110002028635 Subparts reported C, D NAICS code 221112 Subpart PP (CO2 supply) No Subpart RR (geologic sequestration) No Subpart UU (CO2 injection) No Reporting year 2023 GHGRP facility ID 1001307
Fuel burned (MMBtu), 2025	6,387,010
Capacity factor, 2025	0.228
Heat rate (Btu/kWh), 2025	7,494.9
Net generation (MWh), 2025	852,182
Balancing authority code	ISNE

5 sources

Sources

EIA-860MOpen license · retrieved Nov 4, 2026
GEMOpen license, with credit · retrieved Oct 26, 2026Global Integrated Power Tracker, Global Energy Monitor, September 2026 release (https://globalenergymonitor.org/projects/global-integrated-power-tracker), CC BY 4.0. Modified by Inframation: TransitionZero-sourced rows removed; statuses and technologies mapped to Inframation's vocabulary; figures aggregated. Copyright © Global Energy Monitor. Global Integrated Power Tracker, September 2026 release. Distributed under a Creative Commons Attribution 4.0 International License.
EIAOpen license · retrieved Nov 1, 2026Source: U.S. Energy Information Administration, Electricity bulk data (Form EIA-923 monthly plant series)
EIA-860M Preliminary Monthly Electric Generator Inventory
EPA Greenhouse Gas Reporting Program — facility register with parent-company shares (Envirofacts pub_dim_facility; FLIGHT)

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Sources