Twelvemile Solar 3 — Plant Summary
- EIA Plant ID
- 68089
- Capacity
- 200 MW
- Primary Fuel
- Solar
- Technology
- Solar Photovoltaic
- Status
- Planned
- Location
- Mayes, OK
- Operating Since
- —
- Generators
- 1
- Operator
- Leeward Asset Management, LLC
- Parent Company
- —
- Balancing Authority
- Southwest Power Pool
- ISO/RTO
- SPP
- NERC Region
- MRO
Twelvemile Solar 3
PlannedSolarGEM: construction
Ranked #1 of 22 Solar plants in OK#317 of 7447 nationally
200 MW Solar planned in Mayes, OK — Southwest Power Pool
EIAGEM
200 MW
Nameplate Capacity
1
Generators
unit
Solar Photovoltaic
Technology
Planned: —
Planned Operation
Location
Coordinates
36.3316, -95.2293
County
Mayes, OK
Nearby Plants
- Saltbranch Solar 1Solar73 MW · 0.0 km
- Saltbranch 2Solar73 MW · 0.0 km
- Twelvemile Solar 1 & 2Solar152 MW · 0.0 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 | Leeward Asset Management, LLC | Leeward Energy | — |
| Owner(s) | Leeward Asset Management, LLC | Leeward Energy | — |
| Status | Planned | construction | — |
Ownership Chain
GEM identifies the owner as Leeward Energy
This entity is not yet in the GEM ownership database — chain unavailable.
About
Twelvemile Solar 3 is a 200 MW solar photovoltaic power plant located in Mayes County, Oklahoma. The facility is owned and operated by Leeward Asset Management, LLC. It utilizes a single generator and fixed-tilt solar tracking technology. The plant's primary fuel source is solar energy.
Twelvemile Solar 3 operates within the Southwest Power Pool (SPP) balancing authority and the Midwest Reliability Organization (MRO) NERC region. It is ranked as the largest solar plant in Oklahoma out of six such facilities, and ranks 250th nationally out of 639 solar plants. News reports indicate at least one deal associated with the plant.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
MRO
Balancing Authority
Southwest Power Pool
Grid Voltage
kV
Regulatory Status
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
No generation data available for this plant.
Financial Data
No financial data available for this plant.
Pricing & Market Data
MEDIUM confidencePoint of Interconnection
Nearest Substation
Pryor Junction Substation · 138 kV
Substation Distance
2.068 km
Coord Source
OSM spatial
Market Position
ISO/RTO Market
SPP
LMP Node
CSWS.NUEN.CSI1
Pricing Hub
SPP South Hub
Node Source
Curated node match
News & Articles (3)Beta
Hazards·wildfire
Red Flag Warning: Benton; Washington; Osage; Washington; Nowata; Craig; Ottawa; Pawnee; Tulsa; Rogers; Mayes; Delaware
Red Flag Warning issued March 21 at 12:15PM CDT until March 22 at 8:00PM CDT by NWS Tulsa OK
Red Flag Warning (hazard)
NWS Tulsa OK·5 days ago
Deals·ppa
Google buys data centre power from giant US solar farms
Leeward Renewable Energy (LRE) announced three solar projects totaling 724MW in the US state of Oklahoma, supported in part by long-term PPAs with Google.
Google (buyer)Leeward Renewable Energy (seller)
Recharge News·1 years ago
General
‘The horse is out of the barn’: DeKalb County Board approves 3 industrial solar projects by Leeward Energy, Samsung
In front of a standing room only crowd packed into the DeKalb County Board meeting Wednesday, three solar energy projects which have come...
Shaw Local·4 years ago
Last updated 2026-03-21
View all articles