Henrietta Peaker

Power plant · Gas, combustion turbine

Key facts

Power plant · Gas, combustion turbine Operating

Net generation MWh by year, 2002 to 2026

Fuel burned MMBtu by year, 2002 to 2026

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Technology: Gas, combustion turbine source: “Natural Gas Fired Combustion Turbine”
Age: 24 years since 2002
Unused energy: 855 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: 11,084 Btu/kWh 2025

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

Attributes
Attribute	Value
Gem	Parents Name small shareholder(s) Share pct 78.10 Gem entity id E100001015587 Name natural person(s) Share pct 16.20 Gem entity id E100000123261 Name UBS Fund Management (Switzerland) AG Share pct 5 Gem entity id E100002006770 Name The Vanguard Group Inc Share pct 0.400 Gem entity id E100001010595 Name Blackrock Advisors LLC Share pct 0.300 Gem entity id E100001015833 Unit ids G100000410150 Location id L100000407714 Eia plant ids 55807
Grid	Nerc region WECC Report year 2025 Grid voltage kv 70 Transmission owner Pacific Gas & Electric Co Balancing authority code CISO Balancing authority name California Independent System Operator
EPA greenhouse gas reporting (GHGRP)	EPA FRS ID 110015375556 Subparts reported 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 1000283
Fuel burned (MMBtu), 2025	41,808
Capacity factor, 2025	0.004
Heat rate (Btu/kWh), 2025	11,083.8
Net generation (MWh), 2025	3,772
Balancing authority code	CISO

2 companies

Companies with an ownership or operating interest in this asset.
Company	Role	Share	As of	Source
MRP San Joaquin Energy LLC.	Operator			EIA-860M
Middle River Power	Owner	100.0%	Dec 31, 2023	EPA GHGRP

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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Cherry Permitted	Solar + storage	8.2 mi	359.7
Sand Luis West Permitted	Solar + storage	9.7 mi	156.3
Key Energy Storage Under construction	Storage	14.5 mi	300.1

Sources