Oso Grande Wind Farm — Plant Summary
- EIA Plant ID
- 63502
- Capacity
- 249.8 MW
- Primary Fuel
- Wind
- Technology
- Onshore Wind Turbine
- Status
- Operating
- Location
- Lea, NM
- Operating Since
- 2021
- Generators
- 2
- Operator
- Tucson Electric Power Co
- Parent Company
- Fortis
- Annual Generation
- 550,765 MWh
- Capacity Factor
- 25.1%
- Balancing Authority
- Tucson Electric Power Company
- ISO/RTO
- —
- NERC Region
- WECC
Oso Grande Wind Farm
OperatingWind
Ranked #10 of 32 Wind plants in NM#179 of 1442 nationally
249.8 MW Wind operating in Lea, NM — Tucson Electric Power Company
EIAGEMWD
249.8 MW
Nameplate Capacity
2
Generators
units
Onshore Wind Turbine
Technology
2021
Operating Since
Location
Coordinates
33.0123, -103.7616
County
Lea, NM
Nearby Plants
- Anderson Wind IWind5 MW · 9.0 km
- Anderson Wind IIWind10 MW · 9.6 km
Ownership & Operator
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Tucson Electric Power Co | EDF Renewables | — |
| Owner(s) | Tucson Electric Power Co | Fortis | — |
| Status | Operating | operating | — |
Ownership Chain
About
The Oso Grande Wind Farm is a 249.8 MW wind power facility located in Lea County, New Mexico. The plant began operating in 2021 and is owned by Fortis, a Canadian company, and operated by Tucson Electric Power Co. It consists of two generators utilizing onshore wind turbine technology. The facility ranks as the 10th largest wind farm in New Mexico out of 22, and 175th nationally out of 734.
The wind farm uses Siemens Gamesa Renewable Energy SG-4.5-145 turbines, with a hub height of 107.5 meters and a rotor diameter of 145 meters. In its most recent year of operation, the plant generated 550,765 MWh, achieving a capacity factor of 25.1%. The installed cost of the facility was $1,448.27 per kW, according to FERC data. The Oso Grande Wind Farm operates within the Western Electricity Coordinating Council (WECC) NERC region and is under the balancing authority of Tucson Electric Power Company.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
WECC
Balancing Authority
Tucson Electric Power Company
Grid Voltage
345 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
Generation
41.6K MWh
Latest Month
550.8K MWh
Annual Generation
25.1%
Capacity Factor
Jan 2023 – Dec 2025
Financial DataBeta
Source: FERC Form 1HIGH
$1,456/kW
Installed Cost
Tucson Electric Power Company
Reporting Utility
Cumulative Installed Cost
Per-Unit Cost Trends
Pricing & Market Data
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
News & Articles (2)Beta
Grid·capacity addition
Tucson Electric Power nears completion of huge wind farm in New Mexico
The 250-megawatt Oso Grande Wind project, expected to go online by the end of November, will be by far TEP's largest renewable-energy...
Tucson Electric Power (operator)TEP (operator)
Arizona Daily Star·5 years ago
General
Power line to connect TEP's biggest solar project closer to final approval
A power-line project to connect what will be Southern Arizona's biggest solar-energy farm to Tucson Electric Power Co.'s grid is headed to final approval by...
Arizona Daily Star·5 years ago
Last updated 2026-03-26
View all articles