Search
Search plants, projects, owners, and states
Search plants, projects, owners, and states
1788.3 MW Conventional Steam Coal (594 MW) + Natural Gas Fired Combined Cycle (600 MW) + Natural Gas Fired Combustion Turbine (594 MW) operating in Mayes, OK — Southwest Power Pool
1,788.3 MW
Nameplate Capacity
4
Generators
units
Hybrid (3)
Technology
Conventional Steam Coal + Natural Gas Fired Combined Cycle + Natural Gas Fired Combustion Turbine
1985
Operating Since
Coordinates
36.1903, -95.2894
County
Mayes, OK
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Grand River Dam Authority | Grand River Dam Authority | — |
| Owner(s) | Grand River Dam Authority | Grand River Dam Authority | — |
| Status | Operating | — | — |
Located in Mayes County, Oklahoma, the plant is owned and operated by the Grand River Dam Authority. The facility has a total capacity of 1788.3 MW across four generators, making it the largest power plant in Oklahoma and the 39th largest in the United States. The plant is a hybrid facility utilizing multiple technologies including Conventional Steam Coal, Natural Gas Fired Combined Cycle, and Natural Gas Fired Combustion Turbine. The primary fuel source is natural gas. The plant began operating in 1985.
The plant operates within the Southwest Power Pool balancing authority and the MRO NERC region. The latest annual generation data shows an output of 3,996,684 MWh, resulting in a capacity factor of 25.5%. Financial data indicates a Power Purchase Agreement (PPA) price of $8.5 per MWh, as reported in FERC EQRs. News coverage related to the plant includes 6 articles categorized as industry news, 2 as regulatory news, and 1 as hazard-related news.
Generated from EIA, GEM, and public data sources
ISO/RTO
SPP
Market
ISO/RTO Member
NERC Region
MRO — Midwest Reliability Organization
Balancing Authority
Southwest Power Pool (SWPP)
Grid Voltage
161.0 kV
Regulatory Status
RE — Regulated
Entity Type
State
Sector
Electric Utility
228.1K MWh
Latest Month
4.0M MWh
Annual Generation
25.5%
Capacity Factor
CO₂ Intensity
1191 lb/MWh
NOx
0.551 lb/MWh
SO₂
0.434 lb/MWh
CH₄
0.072 lb/MWh
N₂O
0.010 lb/MWh
Capacity Factor
34.6%
Annual Net Gen
3617 GWh
CO₂eq
1195 lb/MWh
Subregion
SPP South
Grand River Dam Authority · Data from 2019–2025
$8.5/MWh
PPA Price
Market Position
ISO/RTO Market
SPP
LMP Node
GRDAGRDA17UN2
Pricing Hub
SPP South Hub
Node Source
EIA-860 direct report
No news articles linked yet for this plant.
News enrichment runs on demand — we have the pipeline, we just haven't fetched coverage for this plant yet. Request a detailed re-run and we'll add it.
No ask pi reports yet for this entity.
ask pi about GREC