The proposed Louisiana development combines a 2.88-GW natural gas plant, a 700-MW/2.88-GWh battery system and a co-located data center campus, but ONE Nuclear has not announced a construction decision, budget or operating date.
Published by Allstream Insiders
Allstream Insiders Summary
ONE Nuclear Energy has executed a binding letter of intent with a Louisiana landowner group that the company says provides site control for Project Cayman. The proposed development includes a 2.88-gigawatt natural gas power plant, a 700-megawatt, 2.88-gigawatt-hour battery energy storage system and a co-located high-capacity data center campus.
ONE Nuclear located the project near Louisiana’s RiverPlex MegaPark and northeast of SpaceX’s announced Louisiana development. The company did not identify the landowner group, exact project site, parish, acreage or data center customer in its August 31 announcement.
The binding letter of intent is a site-control milestone. It should not be interpreted as a final investment decision, construction authorization, power-purchase agreement or regulatory approval. ONE Nuclear has not disclosed Project Cayman’s capital cost, financing, construction schedule or target commercial-operation date.
Project Cayman Development Tracker
| Project item | Company-reported detail | Current status |
|---|---|---|
| Natural gas generation | 2.88 GW | Proposed as part of Project Cayman |
| Battery energy storage system | 700 MW / 2.88 GWh | Proposed as part of Project Cayman |
| Data center | Co-located high-capacity campus; IT load and customer not identified | Proposed as part of Project Cayman |
| Location | Near RiverPlex MegaPark in Louisiana; exact site and parish not disclosed | Site control reported through a binding letter of intent |
| Community outreach | Public information meetings expected from September through December 2026 | Outreach underway, according to ONE Nuclear |
| Construction and operations | No final investment decision, construction start or operating date announced | Early development |
What does Project Cayman’s binding letter of intent establish?
ONE Nuclear says the agreement provides site control for development of Project Cayman. Site control is an important early development requirement because it gives a developer a contractual basis to evaluate and advance a proposed location.
The public announcement does not describe whether the site-control arrangement is structured as a purchase option, lease option or another form of land agreement. It also does not disclose the agreement’s term, financial commitments, development deadlines or termination provisions.
Calling the letter of intent binding does not establish that the power plant, battery system or data center has been fully approved or financed. ONE Nuclear’s SEC-filed announcement identifies the planned capacities as forward-looking and notes risks involving development timelines, permitting, commercial viability and the company’s ability to raise additional capital.
Project Cayman combines gas generation, storage and data infrastructure
The disclosed configuration pairs dispatchable natural gas generation with utility-scale battery storage and a co-located data center campus. The natural gas plant is planned for 2.88 GW of generation capacity. The battery system is separately described as having 700 MW of power capacity and 2.88 GWh of energy capacity.
The announcement does not identify the gas-generation technology, equipment supplier, number of generating units, fuel-consumption requirements or emissions-control configuration. It also does not disclose the battery supplier, chemistry, number of enclosures or intended operating profile.
ONE Nuclear’s broader business strategy includes natural gas and advanced nuclear technologies. However, the announced Project Cayman configuration includes a natural gas plant and battery storage; the August 31 release does not identify an advanced nuclear reactor or small modular reactor as part of this project.
The data center campus has not been assigned a disclosed customer
ONE Nuclear describes a high-capacity data center campus co-located with the energy project, but it does not identify a hyperscaler, tenant, operator or contracted power customer. The company also has not provided the campus’s planned IT load, building count, development phases, cooling design or water requirements.
The co-location concept could allow generation, storage and computing infrastructure to be planned together. At this stage, however, the announcement does not establish how much of the power plant’s output would serve the data center, how much could be delivered to the regional grid, or whether any electricity sales agreement has been executed.
ONE Nuclear positions the project near RiverPlex and regional transmission investment
ONE Nuclear says Project Cayman is near RiverPlex MegaPark and aligned with Entergy’s regional transmission buildout. The developer also placed the site northeast of SpaceX’s announced Louisiana infrastructure expansion and cited SpaceX and Hyundai developments as examples of regional power-demand growth.
Those references provide geographic and economic-development context. They do not confirm that SpaceX, Hyundai, Entergy or a RiverPlex tenant is a Project Cayman customer, partner or investor. The announcement does not identify an executed interconnection agreement, transmission-service agreement or utility procurement.
ONE Nuclear said community outreach is underway and expects public information meetings with local parishes, government agencies and other stakeholders from September through December 2026. No permit applications or agency approvals were identified in the release.
Allstream perspective: site control opens the development path, not construction
Project Cayman’s next material milestones would need to convert the site concept into an engineered, permitted, financed and commercially supported development. If ONE Nuclear advances the project, the disclosed configuration could require work involving:
- Site surveys, geotechnical investigations and environmental studies
- Natural gas supply, delivery and interconnection planning
- Power-generation front-end engineering and equipment selection
- BESS engineering, fire protection, controls and system integration
- Substations, transmission interconnection and grid studies
- Data center civil, structural, electrical, mechanical and cooling systems
- Permitting, community engagement and construction planning
These categories are Allstream analysis based on the announced project configuration. They are not confirmed bid packages, solicitations or contractor awards. The August 31 announcement establishes a proposed scope and reported site-control milestone, but it does not confirm that construction will proceed.
