Mesquite Generating Station Block 1 — Plant Summary
- EIA Plant ID
- 58557
- Capacity
- 691.6 MW
- Primary Fuel
- Natural Gas
- Technology
- Natural Gas Fired Combined Cycle
- Status
- Operating
- Location
- Maricopa, AZ
- Operating Since
- 2003
- Generators
- 3
- Operator
- Salt River Project
- Parent Company
- Salt River Project
- Annual Generation
- 3,522,461 MWh
- Capacity Factor
- 58.2%
- Balancing Authority
- Salt River Project
- ISO/RTO
- —
- NERC Region
- WECC
Mesquite Generating Station Block 1
OperatingNatural Gas
Ranked #13 of 33 Natural Gas plants in AZ#318 of 2009 nationally
691.6 MW Natural Gas operating in Maricopa, AZ — Salt River Project
EIAWD
691.6 MW
Nameplate Capacity
3
Generators
units
Natural Gas Fired Combined Cycle
Technology
2003
Operating Since
Location
Coordinates
33.3450, -112.8642
County
Maricopa, AZ
Nearby Plants
- Mesquite Generating Station Block 2Natural Gas691.6 MW · 0.0 km
- Arlington Valley Energy FacilityNatural Gas713 MW · 2.4 km
- Red HawkNatural Gas1127 MW · 2.5 km
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
Mesquite Generating Station Block 1 is a 691.6 MW natural gas-fired combined cycle power plant located in Maricopa County, Arizona. The plant began operating in 2003 and is owned and operated by Salt River Project (SRP). It consists of three generators. The plant is located within the Western Electricity Coordinating Council (WECC) NERC region and is under the balancing authority of SRP.
In the most recent year with available data, Mesquite Generating Station Block 1 produced 3,522,461 MWh of electricity, achieving a capacity factor of 58.2%. The plant ranks as the 13th largest in Arizona out of 26 plants, and 322nd nationally out of 945 plants.
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
356.7K MWh
Latest Month
3.5M MWh
Annual Generation
58.2%
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 (1)Beta
Grid·capacity addition
Last GW of 2.25 GW coal-fired Navajo Generating Station expected to shut down any day now
The Navajo Generating Station ended operations Nov. 18, majority owner Salt River Project (SRP) announced Monday.
Navajo Generating Station (operator)Salt River Project (operator)
Utility Dive·6 years ago
Last updated 2026-03-14
View all articles