Data center profile · Near RiverPlex MegaPark, Ascension Parish, Louisiana (west bank of the Mississippi River)

Project Cayman (ONE Nuclear)

ONE Nuclear's planned 2.88 GW gas plant with 700 MW battery and co-located data center campus in Ascension Parish, Louisiana; no offtaker or filings.

Announced, site control only. ONE Nuclear signed a binding letter of intent for site control on Aug. 31, 2026. No power contract, customer, parish action or state filing is on record, and the parish president said no project is awaiting approval.
2.88 GW
planned on-site gas generation (developer says)
generation, not data center load; a 700 MW / 2.88 GWh battery would be storage
700 MW
planned battery storage, not generation
2.88 GWh (developer says)
0
power purchase agreements, offtakers or contracted MW disclosed
trade commentary and company release name none
Sept. to Dec. 2026
public information meetings the company plans
company statement
OperatorONE Nuclear Energy LLC (a subsidiary of ONE Nuclear Energy Inc.)
CustomerNone named
First building in serviceOur estimate: 2029 or later (no dated power path yet).
Next deadlineDec. 2026: Company-planned public information meetings with parishes and agencies run through Dec. 2026
Power

Power and the grid

None energized or contracted yet

On-site natural gas plantAnnounced, nothing filed
2,880 MW
developer's planned size; no contract, offtaker or air permit; generation capacity, not data center load Company · Aug. 2026
Proposed
Other sources, size not disclosed

Getting on the grid

Who supplies what, what it costs, and what is still not public.

  1. As of Oct. 2026
    No state or federal utility filing found
    No Louisiana Public Service Commission certificate or docket names the project. see Permits
  2. As of Oct. 2026
    No air permit
    No Louisiana DEQ air permit application is on record, and no NRC action exists because the plant is gas-fired. see Permits
Permits

Permits checklist

1 granted · 3 checked, nothing on file

Approvals a campus like this normally needs (including an air permit for backup or on-site generators), and what we found.

Risks

What could slow it down

Timeline

What happened, and what is due

SitePaper trailConstructionPowerPermitsMoneyLegalUpcoming
  1. Feb. 10, 2025
    Paper trail ONE Nuclear Energy LLC registered in Delaware
  2. Aug. 31, 2026
    Site ONE Nuclear announces a binding letter of intent for site control and a 2.88 GW gas plant with a co-located data center Company · Aug. 2026
  3. Sept. 2026
    Site Company outreach and public information meetings begin, planned through December Company · Aug. 2026
  4. Sept. 17, 2026
    Permits Ascension officials say they need data center rules in place in case a facility is proposed News report · Sept. 2026
  5. Oct. 1, 2026
    Permits The parish council postpones its data center code amendment; the parish president says no project awaits it News report · Oct. 2026
The buildings

Specs

~17,000 acres the RiverPlex MegaPark the site is near, not the project's own acreage. News report · Aug. 2026

Who is involved

Owners, partners and builders

Owners and developers
  • ONE Nuclear Energy LLC: developer
  • A Louisiana landowner group (unnamed): counterparty to the site letter of intent
Decision-makers
  • Ascension Parish Council and President Clint Cointment: no project action
  • Louisiana Public Service Commission and Louisiana DEQ: future filings
Still unknown

Open questions

Where this comes from

25 records from 12 documents

Drawn from news reports, company statements and business registries, each kept with its date and source. The bar shows documents by type.

News report 10Company 2
Evidence

Every quote behind this page

Grade key: A = the primary record itself (permit, filing, exhibit) · B = a dated official statement · C = news reporting. Map distances are our own measurements on OpenStreetMap and carry no grade. Allegations in lawsuits are marked as such in the quotes.

Power (4)
  • On-site generation: 2,880 MW
    “providing site control for the development of Project Cayman, a 2.88 GW natural gas plant and a 700MW, 2.88GWh Battery Energy Storage System (BESS) project with a co-located high-capacity data center campus”
    Company · Aug. 2026 · grade B
  • No offtaker, PPA or contracted MW has been disclosed for Project Cayman. Trade commentary (PowerSov, Sep 1, 2026) flags the absence of contracted load behind the 2.88 GW plant and questions ratepayer exposure via Entergy
    “The source materials name no offtaker. ONE Nuclear calls the data center campus 'co-located' but offers no signed power purchase agreement, contracted megawatts, or offtaker creditworthiness.”
    News report · Sept. 2026 · grade C
  • Project status: announced
    “ONE Nuclear Energy has secured site control to develop its 2.9 GW Project Cayman gas-fired power project coupled with a 700 MW/2.9 GWh BESS and a co-located data centre campus in Louisiana”
    News report · Aug. 2026 · grade C
  • Announcement-stage only: Project Cayman generation basis is mw generation onsite of 2,880 MW natural gas plus 700 MW / 2.88 GWh BESS storage as stated by the company; no MW for the co-located data center itself (mw it /
    “the developer will work on Project Cayman, a 2.88 GW natural gas plant and 700MW, 2.88GWh Battery Energy Storage System project”
    News report · Aug. 2026 · grade C
Money and contracts (3)
  • Binding Letter of Intent (LOI) for site control - Project Cayman: site control Binding LOI provides site control for development of Project Cayman near RiverPlex MegaPark; no parish agreement, rezoning or permit is state
    “executed a binding letter of intent (LOI) with a prominent Louisiana landowner group, providing site control for the development of Project Cayman”
    Company · Aug. 2026 · grade B
  • SPAC business combination completed Sep 24, 2026 (shareholder approval Aug 24, 2026): ONE Nuclear became publicly traded (Nasdaq: ONEN), giving it public-market access to advance an approximately 5 GW Louisiana developme
    “The combined company, ONE Nuclear Energy Inc., expects its shares to begin trading on the Nasdaq Global Market under the ticker symbol ONEN on or about September 24, 2026.”
    News report · Sept. 2026 · grade C
  • Binding Letter of Intent (LOI) for site control - Project Cayman: site control loi Binding letter of intent executed August 31, 2026 giving ONE Nuclear site control for Project Cayman near the ~17,000-acre RiverPlex Mega
    “providing site control for the development of Project Cayman, a 2.88 GW natural gas plant and a 700 MW, 2.88 GWh Battery Energy Storage System (BESS) project with a co-located high-capacity data centre campus”
    News report · Aug. 2026 · grade C
Permits and government (3)
  • County code: 22005
    “The Ascension Parish Council postponed deciding on an amendment to add specifications for high impact development facilities, including data centers, to the unified land development code”
    News report · Oct. 2026 · grade C
  • At the Oct. 1, 2026 council meeting on the parish-wide data center code, Parish President Clint Cointment stated there is no project awaiting the regulations, supporting the none-found for any Project Cayman parish actio
    “There is no project that's sitting here waiting for this to be approved. Absolutely none. I encourage the council to take your time”
    News report · Oct. 2026 · grade C
  • As of capture, Cayman's entire regulatory footprint is one LOI and a promise of public meetings through end-2026. The filings that would make it real - LA DEQ PSD air application, LPSC certification (if grid sales), FERC
    “The company plans public information meetings through the end of 2026”
    News report · Sept. 2026 · grade C
Site and other (2)
  • Company states community outreach is underway with public information meetings with local parishes, government agencies and other stakeholders from September through December 2026; no construction decision is announced i
    “Community outreach is already underway and is expected to include a series of public information meetings with local parishes, governmental agencies and other project stakeholders from September through December 2026”
    Company · Aug. 2026 · grade B
  • Community outreach underway: public information meetings with local parishes, governmental agencies and other stakeholders scheduled September through December 2026. No construction decision, cost, schedule or COD has be
    “Community outreach is already underway and is expected to include a series of public information meetings with local parishes, governmental agencies and other project stakeholders from September through December 2026.”
    Company · Aug. 2026 · grade B