H Wilson Sundt Generating Station

OperatingNatural GasHybrid

Ranked #21 of 33 Natural Gas plants in AZ#463 of 2009 nationally

528.9 MW Natural Gas Fired Combustion Turbine (54 MW) + Natural Gas Internal Combustion Engine (188 MW) + Natural Gas Steam Turbine (287 MW) operating in Pima, AZ — Tucson Electric Power Company

EIAWD

528.9 MW

Nameplate Capacity

14

Generators

units

Hybrid (3)

Technology

Natural Gas Fired Combustion Turbine + Natural Gas Internal Combustion Engine + Natural Gas Steam Turbine

1962

Operating Since

Location

Coordinates

32.1600, -110.9047

County

Pima, AZ

Nearby Plants

Davis Monthan AFB (AZ) West Airfield
Solar12.6 MW · 1.5 km
Raptor Ridge
Solar12.5 MW · 2.8 km
Valencia Solar
Solar10 MW · 2.8 km

Ownership & Operator

Field	EIA	GEM	Wikidata
Operator	Tucson Electric Power Co	Tucson Electric Power	—
Owner(s)	Tucson Electric Power Co	Fortis	—
Status	Operating	—	—

Ownership Chain

About

The H Wilson Sundt Generating Station is a 528.9 MW natural gas-fired power plant located in Pima County, Arizona. Operated by Tucson Electric Power Co., a subsidiary of the Canadian company Fortis, the plant began operations in 1962 and consists of 14 generators utilizing a combination of natural gas-fired combustion turbine, internal combustion engine, and steam turbine technologies. It is considered a hybrid plant.

In the most recent year of data, the plant generated 1,833,089 MWh of electricity, achieving a capacity factor of 43.1%. The H Wilson Sundt Generating Station operates within the Tucson Electric Power Company balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. It is ranked as the 21st largest power plant in Arizona out of 26, and 468th nationally out of 945 plants.

Generated from EIA, GEM, and public data sources

EIA Plant Profile Wikidata

Engineering & Generators

Grid Context

NERC Region

WECC

Balancing Authority

Tucson Electric Power Company

Grid Voltage

138 kV

Regulatory Status

RE

Entity Type

Investor-Owned Utility

Sector

Electric Utility

Generation

195.6K MWh

Latest Month

1.8M MWh

Annual Generation

43.1%

Capacity Factor

Dec 2022 – Nov 2025

Financial Data

No financial data available for this plant.

Pricing & Market Data

This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.

News & Articles (6)Beta

General

Tucson Electric Power to build another big battery system to meet peak power demand

Tucson Electric Power plans to build a second, large battery system in southeast Tucson to store solar and other energy until later in the day to meet peak...

Arizona Daily Star·1 years ago