Coronado — Plant Summary
- EIA Plant ID
- 6177
- Capacity
- 821.8 MW
- Primary Fuel
- Coal
- Technology
- Conventional Steam Coal
- Status
- Operating
- Location
- Apache, AZ
- Operating Since
- 1979
- Generators
- 2
- Operator
- Salt River Project
- Parent Company
- Salt River Project
- Annual Generation
- 2,933,440 MWh
- Capacity Factor
- 40.8%
- Balancing Authority
- Salt River Project
- ISO/RTO
- —
- NERC Region
- WECC
Coronado
OperatingSub. Coal
Ranked #2 of 2 Sub. Coal plants in AZ#45 of 103 nationally
821.8 MW Sub. Coal operating in Apache, AZ — Salt River Project
EIAWD
821.8 MW
Nameplate Capacity
2
Generators
units
Conventional Steam Coal
Technology
1979
Operating Since
Location
Coordinates
34.5789, -109.2708
County
Apache, AZ
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Salt River Project | Salt River Project | — |
| Owner(s) | Salt River Project | Salt River Project | — |
| Status | Operating | — | — |
Ownership Chain
About
The Coronado Generating Station is an 821.8 MW coal-fired power plant located in Apache County, Arizona. It began operating in 1979 and is owned and operated by Salt River Project. The plant utilizes two generators with conventional steam coal technology, burning subbituminous coal (SUB) as its primary fuel. Coronado is the second-largest coal plant in Arizona, and ranks 39th nationally out of 75 coal plants.
In the most recent year with available data, Coronado generated 2,933,440 MWh of electricity, achieving a capacity factor of 40.8%. The plant operates within the Salt River Project balancing authority and is part of the Western Electricity Coordinating Council (WECC) NERC region. Recent news coverage of the plant has focused on industry trends and regulatory matters.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Salt River Project
Grid Voltage
500 kV
Regulatory Status
RE
Entity Type
Political Subdivision
Sector
Electric Utility
Generation
335.8K MWh
Latest Month
2.9M MWh
Annual Generation
40.8%
Capacity Factor
Jan 2023 – Dec 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 (10)Beta
Regulatory·state puc
Two Arizona coal plants will be converted to natural gas to avoid costly coal retrofits
The Arizona Corporation Commission approved the conversion of Springerville and Coronado coal plants to natural gas, enhancing emissions reduction and grid reliability, with completion expected by 2030.
Arizona Corporation Commission (regulator)
Power Engineering·2 weeks ago
General
Arizona solar policy hinges on this year’s Salt River Project elections
The vote, which takes place between March 11 and April 7, will determine the leadership of the Salt River Project and could have profound...
pv magazine USA·2 weeks ago
Regulatory·state puc
Ariz. Regulators Approve 2 Coal Plant Conversions
Two Arizona utilities received approval to convert coal-fired power plants to run on natural gas, projects they say will enhance...
Arizona (regulator)
RTO Insider·3 weeks ago
Regulatory·state puc
Oversight panel approves switching 2 Arizona power plants from coal to natural gas
PHOENIX (AZFamily) — The Arizona Corporation Commission gave its approval for the switch at the Tucson Electric Power (TEP)-owned plant in...
Arizona Corporation Commission (regulator)Tucson Electric Power (operator)
AZ Family·3 weeks ago
Last updated 2026-03-21
View all 10 articles