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1277.1 MW Natural Gas operating in Maricopa, AZ — New Harquahala Generating Company, LLC - HGBA
1,277.1 MW
Nameplate Capacity
6
Generators
units
Natural Gas Fired Combined Cycle
Technology
2004
Operating Since
Coordinates
33.4760, -113.1134
County
Maricopa, AZ
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | New Harquahala Generating Co, LLC | — | — |
| Owner(s) | BlackRock Inc., Capital Power Corporation | — | — |
| Status | Operating | — | — |
The Harquahala Generating Project is a 1277.1 MW natural gas-fired combined cycle power plant located in Maricopa County, Arizona. It began operating in 2004 and consists of 6 generators. The plant is owned and operated by New Harquahala Generating Co, LLC. It is the second-largest power plant in Arizona out of 26, and ranks 96th nationally out of 945 plants.
In the most recent year of data, the Harquahala Generating Project produced 2,896,555 MWh of electricity, operating at a capacity factor of 25.7%. The plant is located within the Western Electricity Coordinating Council (WECC) NERC region. The balancing authority is New Harquahala Generating Company, LLC - HGBA.
Generated from EIA, GEM, and public data sources
Grid Region
Mountain West
Market
Bilateral Market
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
26.6K MWh
Latest Month
2.9M MWh
Annual Generation
25.7%
Capacity Factor
CO₂ Intensity
833 lb/MWh
NOx
0.068 lb/MWh
SO₂
2013
$965/kW
Est. Construction Cost
Total estimated cost: $1.2B
This plant is in a bilateral market territory without organized wholesale pricing. Nodal pricing data is not available.
Last updated 2026-04-09
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ask pi about Harquahala Generating ProjectNew Harquahala Generating Company, LLC - HGBA (HGMA)
Grid Voltage
525.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
0.004 lb/MWh
CH₄
0.016 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
20.8%
Annual Net Gen
2326 GWh
CO₂eq
834 lb/MWh
Subregion
WECC Southwest