The site
The site from above
Power
Power and the grid
None energized or contracted yet
On-site natural gas engines and turbinesPlanned, no air permit
company goal of over 1 GW (Nov. 2024); no equipment maker, order or air permit on record Company · Nov. 2024
Oklo small nuclear reactorsLetter of intent only
non-binding letter of intent from May 2024; no power contract and no federal license filing for Evanston Company · May 2024
Flow battery storage (XL Batteries)Agreement, not firm orders
intended purchases of 12.5 MW systems in 2028 and 2029, after a 333 kW demonstration in 2027; not firm orders Company · May 2025
Proposed
Not used, not on record, or dropped
- Utility grid Not usednone under the June 2026 plan; the company claimed 120 MW from Rocky Mountain Power in Nov. 2024, but no agreement was found Company · June 2026
Getting on the grid
Who supplies what, what it costs, and what is still not public.
- May 23, 2024Nuclear letter of intentOklo and the developer sign a non-binding letter of intent for 100 MW; nothing has been executed or filed since. Company · May 2024
- Nov. 24, 2024Grid power claimedA company factsheet says 120 MW of Rocky Mountain Power service is secured; no service agreement or regulator filing was found, and the 2026 plan drops the grid. Company · Nov. 2024
- May 6, 2025Gas partner namedPureWest Energy is named preferred partner for natural gas; no volume, price or executed supply contract is public. Company · May 2025
- June 16, 2026Islanded plan approved at county levelThe county permit covers a campus run entirely by on-site gas engines and turbines, with no draw on the grid (company statement). Company · June 2026
- Aug. 27, 2026Power plant rezoning filedPrometheus IPP JV I applies for a zone change and permit for the power-plant site; the planning commission recommends approval, and a Sept. 15 county hearing is set. see Permits
- Not setAir permit: not filedNo application from Prometheus appears in the state air-quality records as of Oct. 18, 2026. see Permits
- The campus is islanded by design, so no grid interconnection or queue filing exists. Company · June 2026
- No source names a maker or model for the gas generation. Company · Oct. 2026
Permits
Permits checklist
2 pending · 1 granted · 3 checked, nothing on file
- ◷Zone change for the power-plant site PendingUinta County Board of Commissioners · Aug. 27, 2026: planning commission recommended approval; board hearing Sept. 15, 2026; outcome not published Local government · Aug. 2026
- ◷Conditional use permit, on-site power plant PendingUinta County Board of Commissioners · Aug. 27, 2026: same hearing; a recommendation is not an approval Local government · Aug. 2026
- ✓Conditional use permit, data center campus GrantedUinta County Board of Commissioners · June 16, 2026: unanimous; 1.25 GW on 506 acres; conditions not published Company · June 2026
- –Checked, nothing on file: Air quality permit, Industrial siting permit, Nuclear license for Oklo reactors
Risks
What could slow it down
- HighPower plant not yet approvedThe board hearing on the power-plant zoning and permit was Sept. 15, 2026, with no published outcome, and no air permit has been filed. see Permits
- HighNo tenant or project financingNo tenant is named and no project lender is on record; the only raise found is $30.3M company-wide against a $10B stated cost.
- MediumState siting review not filedThe project's stated cost is far above the state review threshold, residents asked the county to wait for that review, and no application exists. see Permits
- MediumPower plan has changed repeatedlyEarlier plans leaned on four wind farms, grid power and nuclear; the 2026 plan is gas only, and the gas supply is a preferred-partner framework, not a contract. News report · May 2025
- WatchOriginal timeline long missedThe 2024 plan was operation within 18 months, and no construction is visible. Company · Nov. 2024
Lawsuits
1 case on record
- Dismissed Aug. 17, 2026 (press) Katzl, Rossi et al. v. Uinta CountyWyoming Third District Court News report · Aug. 2026residents challenged the campus permit; the judge ruled they lacked standing
Money
Money on record
$30.3M
sold in a company-wide equity raise
Form D filed Sept. 9, 2026; $34.8M offered; names no project SEC filing · Sept. 2026
~$10B
flagship cost the company has cited
Nov. 2024; no matching financing is on record Company · Nov. 2024
$3.1B
projected economic impact through 2032, University of Wyoming estimate cited by the company
Not on record: In-Q-Tel investment in the company: undisclosed, reported Feb. 2026, company level, not campus financing News report · Feb. 2026; project debt, lender or equity close: as of Oct. 2026 Company · Oct. 2026; tax incentive or abatement: Wyoming's data-center sales tax exemption applies by statute, no award found State agency · Oct. 2026
Timeline
What happened, and what is due
SitePaper trailConstructionPowerPermitsMoneyLegalUpcoming
- 2020Site Trenton Thornock founds Wyoming Hyperscale Whitebox to build a 120 MW campus on his family's ranch News report · 2020
- Sept. 2, 2024Paper trail Prometheus Hyperscale registered in Wyoming and Texas
- Sept. 4, 2024Site The company relaunches as Prometheus Hyperscale and restates the Evanston campus from 120 MW to 1 GW, operational within 18 months News report · Sept. 2024
- Nov. 24, 2024Site A company factsheet cites a $10B flagship, 120 MW of grid power secured and operations in 2025 or 2026 Company · Nov. 2024
- May 6, 2025Power PureWest Energy is named preferred gas partner; no supply contract is public Company · May 2025
- May 2026Permits The county planning commission recommends approval of the campus permit at a heavily attended meeting News report · June 2026
- June 16, 2026Permits The county commissioners unanimously approve the campus permit for 1.25 GW on 506 acres Company · June 2026
- July 16, 2026Legal Three residents petition a state court to review the permit News report · July 2026
- Aug. 17, 2026Legal The judge dismisses the challenge for lack of standing (press) News report · Aug. 2026
- Aug. 27, 2026Permits Planning commission recommends the power-plant rezoning and permit; hearing set for Sept. 15 Company · Aug. 2026
- Sept. 9, 2026Money Prometheus files that it has sold $30.3M of a $34.8M company-wide equity offering SEC filing · Sept. 2026
- Sept. 15, 2026Permits Commissioners hold the power-plant hearing; no outcome is published as of Oct. 18 Local government · Aug. 2026
- 2027Power XL Batteries is due to commission a 333 kW demonstration battery Company · May 2025
Construction activity
Satellite captures by quarter
Since Sept. 2021: 71 satellite captures. The chart starts in the first quarter of 2023; 5 earlier records are not drawn.
Satellite
’23
’24
’25
’26
Dot size: records in the quarter, largest = 6. Two-digit years mark each first quarter.
The buildings
Specs
Who is involved
Owners, partners and builders
Developer
- Prometheus Hyperscale: developer and prospective operator, Houston headquarters per its Form D; formerly Wyoming Hyperscale Whitebox
- Trenton Thornock: founder
- Bernard Looney: CEO since Mar. 2026; Trevor Neilson: president
- Prometheus IPP JV I, LLC: applicant for the power-plant permits
Land
- Thornock family ranch: owns the campus land (developer-affiliated)
- G & C Holdings LLC: owns the power-plant site
Decision-makers
- Uinta County Board of Commissioners and Planning and Zoning Commission
- Wyoming Department of Environmental Quality: air and industrial siting
Power and supply partners
- PureWest Energy: preferred natural gas partner
- Oklo: nuclear letter of intent
- XL Batteries: flow battery storage
- Frontier Carbon Solutions: carbon removal credits
- Lumen: fiber connectivity
Investors
- In-Q-Tel: strategic investor in the company
Opponents
- Uinta County residents who petitioned the county (June 2026) and sued (July 2026)
Still unknown
Open questions
- Whether the county approved the power-plant rezoning and permit.
- Whether 1.25 GW means IT capacity or total load.
- Any tenant, lender or gas supply contract.
- Air permit, equipment maker and construction start.
Where this comes from
305 records from 27 documents
Drawn from company statements, news reports, public and commercial datasets, business registries, state agency records, securities filings, local government records and satellite captures, each kept with its date and source. The bar shows documents by type.
Company 9News report 9Dataset 6State agency 3SEC filing 2Local government 1Satellite 0
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 (39)
- Equity raised (SEC Form D): Prometheus Hyperscale (a corporation, HQ Houston, TX per the form) filed its only SEC document, a Form D, on September 9, 2026: $34,846,637 offered, $30,336,526 sold, first sale June 30, 2026.“totalAmountSold 30336526”SEC filing · Sept. 2026 · grade A
- Prometheus Hyperscale's September 2026 Form D closed $30.3M of a $34.8M company-level equity offering - real capital raised, but small against a 1,250 MW campus and allocated to no named project“totalAmountSold 30336526”SEC filing · Sept. 2026 · grade A
- Address: On-site power (IPP) facility site: Section 19, T15N, R118W, 6th P.M., Uinta County, near County Road 180; land owned by G & C Holdings LLC“The subject property is owned by G & C Holdings LLC, near County Road 180”Local government · Aug. 2026 · grade A
- Nearest substation: 4.55 km - unnamed substation (138 kV)Measured on OpenStreetMap map data.
- Nearest power line of 345 kV or more: none mapped on the map within 16 kmMeasured on OpenStreetMap map data.
- Nearest power line of 138 kV: 3.05 km - 138 kV lineMeasured on OpenStreetMap map data.
- Nearest gas pipeline: 2.57 km - unnamed pipelineMeasured on OpenStreetMap map data.
- Nearest power plant: 2.3 km - unnamed plant/generatorMeasured on OpenStreetMap map data.
- Operator: Prometheus Hyperscale (developer-operator; no separate operator named)“Prometheus Hyperscale puts energy first in powering the age of intelligence”Company · Oct. 2026 · grade B
- Generator maker and model: No OEM or model named for the gas generation in any source checked; storage is the XL Batteries Organic Flow Battery; the SMR in the 2024 LOI is the Oklo Aurora“XL Batteries will deliver and commission a 333 kilowatt (kW) demonstration-scale standalone Organic Flow Battery at Prometheus' facility in 2027”Company · Oct. 2026 · grade B
- Uinta County Planning and Zoning Commission unanimously recommends approval of zoning and CUP for the on-site power facility site (Prometheus IPP JV I, LLC, Section 19 T15N R118W); Board of Commissioners hearing set for“the Uinta County Planning and Zoning Commission unanimously voted to recommend approval of the zoning and conditional use permits for the on-site power generation facility”Company · Aug. 2026 · grade B
- Stated campus size: 1,250 MW“The 506-acre site is designed for 1.25 GW of initial capacity with a development path to 5 GW”Company · June 2026 · grade B
- Power model: Fully islanded microgrid - on-site natural gas engines and turbines, no draw on the public utility grid (company statement)“The Evanston campus will operate as a fully islanded microgrid, generating power on-site through high-efficiency natural gas engines and turbines with no draw on the public utility grid”Company · June 2026 · grade B
- Stated campus size: 1,250 MW“The 506-acre site is designed for 1.25 GW of initial capacity with a development path to 5 GW”Company · June 2026 · grade B
- Interconnection status: Off-grid by design - no public position: the Evanston campus will operate as a fully islanded microgrid with on-site natural gas engines and turbines and no draw on the public utility grid; the sp“The Evanston campus will operate as a fully islanded microgrid, generating power on-site through high-efficiency natural gas engines and turbines with no draw on the public utility grid”Company · June 2026 · grade B
- Stated campus size: 1,250 MW“the 506-acre site, which is designed for 1.25 GW of initial capacity with a development path to 5 GW”Company · June 2026 · grade B
- Stated campus size: 5,000 MW“designed for 1.25 GW of initial capacity with a development path to 5 GW”Company · June 2026 · grade B
- Phases: Full 1.25 GW campus built out in phases over 48 to 60 months; phase count and per-phase MW not disclosed“the full 1.25 GW campus expected to be built out in phases over 48 to 60 months”Company · June 2026 · grade B
- Utility: None under the Jun 2026 plan - fully islanded microgrid with no draw on the public utility grid“generating power on-site through high-efficiency natural gas engines and turbines with no draw on the public utility grid”Company · June 2026 · grade B
- Grid operator: none (islanded; no ISO)“eliminating interconnection queue exposure and ratepayer impact as regulatory risk factors”Company · June 2026 · grade B
- Interconnection status: none - no grid interconnection or queue filing; islanded by design under the current plan“will operate as a fully islanded microgrid”Company · June 2026 · grade B
- Power plan: onsite (islanded on-site natural gas microgrid per the Jun 2026 CUP plan; the 2024-25 plan mixed wind farms, Rocky Mountain Power grid supply and an Oklo SMR LOI)“The Evanston campus will operate as a fully islanded microgrid, generating power on-site through high-efficiency natural gas engines and turbines”Company · June 2026 · grade B
- On-site power technology: Natural gas engines and turbines (Jun 2026 plan); long-duration organic flow battery storage (XL Batteries); earlier plans added wind, solar and Oklo Aurora SMR“generating power on-site through high-efficiency natural gas engines and turbines”Company · June 2026 · grade B
- Stated campus size: 1,200 MW“Prometheus' Wyoming project is planned to be 1.2GW with a unique ability to increase significantly”Company · May 2025 · grade B
- Gas supplier: PureWest Energy, LLC named preferred partner for verified low-carbon natural gas (May 6, 2025); no supply volumes, term or executed supply contract disclosed“PureWest will be Prometheus' preferred partner for verified low-carbon and low-water intensity natural gas”Company · May 2025 · grade B
- PureWest Energy (gas) and Frontier Carbon Solutions (carbon removals) named preferred partners for the flagship; Wyoming project stated at 1.2 GW; first phase to use over 500,000 tons/yr of carbon removals“Prometheus' Wyoming project is planned to be 1.2GW with a unique ability to increase significantly”Company · May 2025 · grade B
- On-site generation: 1,000 MW“With an on-site generation goal of over 1 GW, which will make it one of the largest data centers in the world”Company · Nov. 2024 · grade B
- Utility: Rocky Mountain Power - Nov 2024 company factsheet stated Prometheus had secured an initial 120 MW of grid power through RMP with plans for an additional 120 MW; no ESA or PSC filing located and the Jun 2026 isla“Prometheus has secured an initial 120 MW of grid power through Rocky Mountain Power, with plans for an additional 120 MW”Company · Nov. 2024 · grade B
- Bernard Looney appointed Chairman; Evanston described as a $10B flagship project; factsheet states 120 MW of Rocky Mountain Power grid power secured plus 120 MW planned, a 640-acre plot in a 12,000-acre ranch, and a 2025“provide strategic counsel on $10B flagship project in Evanston, Wyoming”Company · Nov. 2024 · grade B
- Oklo and Wyoming Hyperscale sign a non-binding LOI toward a 20-year PPA for 100 MW from Aurora powerhouses - the campus's only nuclear instrument; nothing has been executed or filed since“The companies have signed a non-binding letter of intent outlining their intent to enter into a 20-year Power Purchase Agreement”Company · May 2024 · grade B
- Stage: County-permitted but pre-construction: data-center CUP in hand and the court challenge dismissed, but the power plant has no county CUP decision yet, no ISC or air permit, no financing and no tenant“Construction is anticipated to begin within six months of final permitting”Company · Oct. 2026 · grade C
- Paper or real: Real: family land control, the county CUP (which survived a court challenge) and filed IPP applications. Paper: the 1.25 GW of generation (no air permit, no OEM, no equipment order), all financing, any ten“Notice is hereby given that Prometheus IPP JV I, LLC has applied for a Land Use District Change (Zone Change) for Section 19, T15N, R118W, 6th P.M., Uinta County, Wyoming”Local government · Oct. 2026 · grade C
- DCD feature describes the then-current power plan: most power from four wind farms near Evanston, less than 10 percent from the state grid falling to zero, Oklo 100 MW, on-site solar plus batteries; first 120 MW hoped on“Most of the power for the campus will be supplied directly by four wind farms located in the vicinity of Evanston”News report · May 2025 · grade C
- Stated campus size: 1,000 MW“A 120MW data center planned for farmland in Wyoming will now have IT capacity of 1GW”News report · Sept. 2024 · grade C
- Wyoming Hyperscale becomes Prometheus Hyperscale; Evanston capacity restated from 120 MW to 1 GW; company says work on the first phase is already underway and the site will use 100 percent renewable energy, operational w“Capacity at the data center had been expected to be 120MW, but this has now been revised up to 1GW”News report · Sept. 2024 · grade C
- Announced: Aug. 25, 2021“The project, full name Wyoming Hyperscale White Box LLC, aims to build a liquid-cooled data center near Evanston, Uinta County, using liquid cooling from Submer, and powered by wind energy from local wind farms”News report · Aug. 2021 · grade C
- Stated campus size: 120 MW“Thornock started Wyoming Hyperscale Whitebox in 2020, with a vision for a 120MW fully liquid-cooled campus using zero water”News report · 2020 · grade C
- Announced: 2020 (Wyoming Hyperscale Whitebox founded; 120 MW campus on the family ranch)“Thornock started Wyoming Hyperscale Whitebox in 2020”News report · 2020 · grade C
- Trenton Thornock founds Wyoming Hyperscale Whitebox to build a 120 MW fully liquid-cooled, zero-water campus on the family ranch at Aspen Mountain, powered by local wind farms with waste heat reused on an indoor farm“Thornock started Wyoming Hyperscale Whitebox in 2020, with a vision for a 120MW fully liquid-cooled campus using zero water”News report · 2020 · grade C
Money and contracts (25)
- Incentives: None found - no abatement, PILOT or incentive agreement disclosed for this campus; Wyoming's statutory data-center sales/use tax exemption (W.S. 39-15-105) applies by statute but no certification or award for“the sales price paid for the purchase or rental of qualifying computer equipment including computers, servers, monitors, keyboards, storage devices and other peripherals”State agency · Oct. 2026 · grade B
- Economic impact stated: $3.1B total economic impact through 2032; $184M state tax revenue during construction; $53M annually once operational (University of Wyoming Center for Business and Economic Analysis, via company“University of Wyoming Center for Business and Economic Analysis projects a $3.1 billion economic impact through 2032”Company · June 2026 · grade B
- Bernard Looney becomes CEO of Prometheus; company describes $30+ billion of hyperscale data center projects (sponsor-level pipeline claim, not campus financing)“Former bp CEO to Lead Company's $30+ Billion Hyperscale Data Center Projects”Company · March 2026 · grade B
- Community Benefit Agreement commitment: scope - sponsor-level commitment (Jan 13, 2026) to Community Benefit Agreements, local hiring and transparency for all Wyoming data center sites; FINDING: no executed Evanston CBA“Prometheus Hyperscale Commits to Community Benefit Agreements, Local Hiring, and Transparency for All Wyoming Data Center Sites”Company · Jan. 2026 · grade B
- Prometheus commits to Community Benefit Agreements, local hiring and transparency for all Wyoming data center sites under its Build Wyoming initiative (sponsor-level; no Evanston CBA published)“Prometheus Hyperscale Commits to Community Benefit Agreements, Local Hiring, and Transparency for All Wyoming Data Center Sites”Company · Jan. 2026 · grade B
- Multi-year deployment agreement (energy storage): scope - deploy on-site long-duration Organic Flow Battery storage systems at Prometheus data centers“today announced a multi-year agreement to deploy on-site long-duration energy storage systems at data centers”Company · May 2025 · grade B
- Multi-year deployment agreement (energy storage): phase 1 delivery - 333 kW demonstration-scale standalone Organic Flow Battery to be delivered and commissioned at Prometheus' facility in 2027 333 kW“XL Batteries will deliver and commission a 333 kilowatt (kW) demonstration-scale standalone Organic Flow Battery at Prometheus' facility in 2027”Company · May 2025 · grade B
- Multi-year deployment agreement (energy storage): planned purchases (stated intent, not firm orders) - one 12.5 MW / 125 MWh commercial-scale system in 2028 and an additional 12.5 MW / 125 MWh system in 2029 12.5 MW“Prometheus intends to purchase one 12.5 megawatt (MW) / 125 megawatt-hour (MWh) commercial-scale system in 2028 and an additional 12.5 MW / 125 MWh system in 2029”Company · May 2025 · grade B
- XL Batteries multi-year agreement: 333 kW Organic Flow Battery demonstration at Prometheus' facility in 2027; intended purchases of 12.5 MW / 125 MWh systems in 2028 and 2029“XL Batteries will deliver and commission a 333 kilowatt (kW) demonstration-scale standalone Organic Flow Battery at Prometheus' facility in 2027”Company · May 2025 · grade B
- Partnership (gas supply and carbon removal): scope - PureWest is the preferred partner for verified low-carbon natural gas; Frontier is the preferred provider of biogenic carbon removal“PureWest will be Prometheus' preferred partner for verified low-carbon and low-water intensity natural gas, and Frontier will be the preferred provider of high-quality, biogenic source carbon removal”Company · May 2025 · grade B
- Partnership (gas supply and carbon removal): scale - first phase of the campus will seek to use over 500,000 tons per annum of carbon removals 500000 tons CO2/yr“The first phase of Prometheus' data center campus will seek to utilize over 500,000 tons per annum of carbon removals”Company · May 2025 · grade B
- Fiber connectivity: Northern transcontinental fiber trunk; agreements for up to 400G of service scaling to 800G (Nov 2024 factsheet); Lumen Private Connectivity Fabric partnership announced Dec 17, 2024“With agreements for up to 400G of service and plans to scale up to 800G when commercially available”Company · Nov. 2024 · grade B
- Stated capital cost: 10000000000 USD“including its $10B flagship data center in Evanston, Wyoming”Company · Nov. 2024 · grade B
- Connectivity partnership: scope - Lumen Private Connectivity Fabric; factsheet states agreements for up to 400G of service, scaling to 800G 400 G“With agreements for up to 400G of service and plans to scale up to 800G when commercially available”Company · Nov. 2024 · grade B
- Grid power arrangement (company-stated): scope - initial 120 MW of grid power secured through Rocky Mountain Power, with plans for an additional 120 MW 120 MW“Prometheus has secured an initial 120 MW of grid power through Rocky Mountain Power, with plans for an additional 120 MW”Company · Nov. 2024 · grade B
- Letter of intent (power purchase, intended): scope - 100 MW of power from Oklo Aurora powerhouses for the data center campus 100 MW“Oklo and Wyoming Hyperscale signed a non-binding letter of intent to collaborate on a 20-year Power Purchase Agreement”Company · May 2024 · grade B
- Letter of intent (power purchase, intended): term - intended PPA term of 20 years 20 years“The companies have signed a non-binding letter of intent outlining their intent to enter into a 20-year Power Purchase Agreement”Company · May 2024 · grade B
- Financing: None disclosed - no project debt, equity raise, lender or financing close announced for the Evanston campus as of Oct 2026“Prometheus Hyperscale and Istmo Energy Partner to Develop Data Center Campus in West Texas”Company · Oct. 2026 · grade C
- Letter of intent (power purchase, intended): bindingness - non-binding; no executed PPA, NRC filing or Oklo deployment at Evanston announced in the 29 months after signing“The companies have signed a non-binding letter of intent”Company · Oct. 2026 · grade C
- Grid power arrangement (company-stated): status - FINDING: no ESA, tariff filing or PSC docket evidencing this arrangement was located; the Jun 2026 CUP plan is fully islanded with no grid draw, so the arrangement appear“generating power on-site through high-efficiency natural gas engines and turbines with no draw on the public utility grid”Company · Oct. 2026 · grade C
- Workforce housing: A workforce hub (construction man camp) is part of the project; Target Hospitality is named as the workforce-hub party in the Jun 2026 citizen petition; no company announcement of the arrangement was f“A bond and enforceable contractual obligations by Prometheus Hyperscale and Target Hospitality sufficient to ensure that the promised low- or no-impact construction and operations are completed”News report · June 2026 · grade C
- In-Q-Tel strategic investment in Prometheus Hyperscale revealed; amount undisclosed; sponsor-level capital, not Evanston project financing“Terms of the deal have not been shared”News report · Feb. 2026 · grade C
- Multi-year deployment agreement (energy storage): termination/cancellation - FINDING: no termination, cancellation or condition clauses are published“today announced a multi-year agreement to deploy on-site long-duration energy storage systems at data centers”Company · May 2025 · grade C
- Partnership (gas supply and carbon removal): termination/conditions - FINDING: no term, gas volume, price, termination or condition clauses are published; this is a preferred-partner framework, not an executed supply con“PureWest will be Prometheus' preferred partner for verified low-carbon and low-water intensity natural gas”Company · May 2025 · grade C
- Letter of intent (power purchase, intended): termination/cancellation - FINDING: no termination or cancellation clause is published; the instrument is a non-binding LOI“signed a non-binding letter of intent outlining their intent to enter into a 20-year Power Purchase Agreement”Company · May 2024 · grade C
Permits and government (19)
- Land Use District Change (zone change, ARD to Industrial): application filed by Prometheus IPP JV I, LLC for Section 19, T15N, R118W (G & C Holdings LLC land); public hearing held Sep 15, 2026; outcome not published in s“Prometheus IPP JV I, LLC has applied for a Land Use District Change (Zone Change) for Section 19, T15N, R118W, 6th P.M., Uinta County, Wyoming”Local government · Aug. 2026 · grade A
- Conditional Use Permit (independent power producer facility): application filed by Prometheus IPP JV I, LLC; Planning and Zoning Commission unanimously recommended approval in Aug 2026; Board hearing Sep 15, 2026; outcom“Prometheus IPP JVI, LLC has applied for a Conditional Use Permit to allow the construction and operation of Independent Power Producer (IPP) facility”Local government · Aug. 2026 · grade A
- Uinta County Board of Commissioners: Public hearing - Prometheus IPP JV I, LLC Land Use District Change (ARD to Industrial) and IPP Conditional Use Permit, Section 19, T15N, R118W“A public hearing on this matter will be held before the Board of Uinta County Commissioners on Tuesday, September 15, 2026, at 2:00 p.m.”Local government · Aug. 2026 · grade A
- Industrial Siting permit (Section 109, W.S. 35-12-109): not filed - no Prometheus application in DEQ ISC notices as of Oct 18, 2026; the campus's stated $10B cost is far above the $283,166,876 ISC jurisdiction threshold“Facilities required to obtain a permit from the Industrial Siting Council include: Facilities with an estimated construction cost of $283,166,876 or more”State agency · Oct. 2026 · grade B
- Nuclear combined license (Oklo Aurora at Evanston): not filed - no NRC application or docket for an Oklo reactor at Evanston; Oklo's only licensing and construction track is Aurora-INL at Idaho National Laboratory“On September 22, 2025, Oklo broke ground on its first Aurora powerhouse at the Idaho National Laboratory in Idaho”Company · Oct. 2026 · grade B
- Uinta County Planning and Zoning Commission: Zoning and conditional use permits for the on-site power generation facility site“the Uinta County Planning and Zoning Commission unanimously voted to recommend approval of the zoning and conditional use permits for the on-site power generation facility”Company · Aug. 2026 · grade B
- Site acres: 506 acres“The vote represents a significant permitting milestone for the 506-acre site, which is designed for 1.25 GW of initial capacity”Company · June 2026 · grade B
- Name: Prometheus Hyperscale Evanston“Prometheus Hyperscale yesterday received unanimous Conditional Use Permit approval from the Uinta County Board of Commissioners for its flagship data center campus near Evanston, Wyoming”Company · June 2026 · grade B
- Acres: 506 acres“The vote represents a significant permitting milestone for the 506-acre site”Company · June 2026 · grade B
- Conditional Use Permit (data center campus): approved - unanimous“Prometheus Hyperscale yesterday received unanimous Conditional Use Permit approval from the Uinta County Board of Commissioners”Company · June 2026 · grade B
- Uinta County Board of Commissioners approves the data center campus Conditional Use Permit unanimously (announced Jun 17, 2026)“Prometheus Hyperscale yesterday received unanimous Conditional Use Permit approval from the Uinta County Board of Commissioners”Company · June 2026 · grade B
- Uinta County Board of Commissioners: Conditional Use Permit for the Prometheus flagship data center campus (506 acres, 1.25 GW initial capacity)“Prometheus Hyperscale yesterday received unanimous Conditional Use Permit approval from the Uinta County Board of Commissioners”Company · June 2026 · grade B
- Construction stage: not stated“Construction is anticipated to begin within six months of final permitting”News report · Oct. 2026 · grade C
- Conditions of approval: Not published in any source opened this pass - the issued CUP document and its conditions were not retrieved (county records not text-searchable)“Prometheus Hyperscale yesterday received unanimous Conditional Use Permit approval from the Uinta County Board of Commissioners for its flagship data center campus near Evanston, Wyoming”Company · Oct. 2026 · grade C
- Uinta County Commission: Public-comment and records dispute over the CUP - petitioner Katzl's records requests and Open Meetings Act notice; County Attorney Loretta Howieson Kallas disputed concealment allegations“During an Aug. 4 county commission meeting, Kallas pushed back on Katzl's complaints and disputed the allegation that the county was concealing records”News report · Aug. 2026 · grade C
- Opposition: Organized local opposition: Jun 12, 2026 citizen petition asked the county to withhold CUP approval pending independent review and confirmation of Industrial Siting Council jurisdiction; a petition for judici“PETITION REQUESTING THAT UINTA COUNTY WITHHOLD APPROVAL OF THE PROMETHEUS HYPERSCALE DATA CENTER PROJECT PENDING INDEPENDENT REVIEW AND FURTHER PUBLIC DISCLOSURE”News report · June 2026 · grade C
- Uinta County residents petition the Commission to withhold approval of the Prometheus project pending independent review, full disclosure and confirmation of Industrial Siting Council jurisdiction; the Commission approve“PETITION REQUESTING THAT UINTA COUNTY WITHHOLD APPROVAL OF THE PROMETHEUS HYPERSCALE DATA CENTER PROJECT PENDING INDEPENDENT REVIEW”News report · June 2026 · grade C
- Conditional Use Permit (recommendation): recommended approval (heavily attended meeting)“Uinta County's planning and zoning commission recommended approval for the project last month during a heavily attended meeting”News report · June 2026 · grade C
- Uinta County Planning and Zoning Commission: Prometheus data center campus conditional use permit - recommendation“Uinta County's planning and zoning commission recommended approval for the project last month during a heavily attended meeting”News report · June 2026 · grade C
Legal (3)
- Lawsuits: Katzl, Rossi et al. v. Uinta County - petition for judicial review of the CUP, Wyoming Third District Court (Judge James Kaste); filed Jul 16, 2026; Rossi voluntarily dismissed Aug 4, 2026; remaining claims dis“The Court can only conclude that the Petitioners do not have standing to challenge Uinta County's decision to issue the Conditional Use Permit”News report · Aug. 2026 · grade C
- Judge James Kaste dismisses the CUP challenge for lack of standing (Rossi had voluntarily dismissed her claims on Aug 4); the CUP remains in place“The Court can only conclude that the Petitioners do not have standing to challenge Uinta County's decision to issue the Conditional Use Permit”News report · Aug. 2026 · grade C
- Residents Christy Katzl, Wilhelm Katzl and Marijke Rossi petition Wyoming's Third District Court for judicial review of the CUP, alleging property-value and safety harms, unnoticed private meetings and unreleased environ“Residents Christy Katzl, Wilhelm Katzl, and Marijke Rossi filed a July 16 petition challenging Uinta County's approval of a conditional use permit”News report · July 2026 · grade C
Site and other (13)
- County code: 56041“FCC Census Block API at 41.26453,-110.76551: County FIPS 56041, Uinta County, Wyoming; legal notice places Section 19 in Uinta County”Dataset · Oct. 2026 · grade B
- Developer: Prometheus Hyperscale“flagship data center campus near Evanston, Wyoming”Company · June 2026 · grade B
- Cooling: Closed-loop liquid cooling; the original Whitebox design used a geothermal-coupled aquifer heat exchange with waste heat reused on an adjacent farm“The facility's closed-loop liquid cooling architecture requires no draw from local water supplies”Company · June 2026 · grade B
- Water use stated: Total campus water consumption projected at the equivalent of roughly 15 homes annually; closed-loop cooling requires no draw from local water supplies“total campus water consumption projected at the equivalent of roughly 15 homes annually”Company · June 2026 · grade B
- Acres: 640 acres“The project encompasses a 12,000-acre ranch, including a dedicated 640-acre plot (about 1 square mile) for data center facilities”Company · Nov. 2024 · grade B
- Acres: 12000 acres“The project encompasses a 12,000-acre ranch”Company · Nov. 2024 · grade B
- Original target date: 2025/26 (Nov 2024 factsheet: flagship operational in 2025/26; Sep 2024 relaunch said operational within 18 months)“when it becomes operational in 2025/26”Company · Nov. 2024 · grade B
- Site description history: Original Wyoming Hyperscale Whitebox site: 58 acres on the north ridgeline of Aspen Mountain, 11 miles southeast of Evanston; first CUP granted early 2021 (company history via DataCenterMap/DCD)“Wyoming Hyperscale is building a data center campus on 58 acres of land on Aspen Mountain, a remote site southeast of Evanston in Wyoming”Dataset · Oct. 2026 · grade C
- Current target date: not stated“the full 1.25 GW campus expected to be built out in phases over 48 to 60 months”Company · Oct. 2026 · grade C
- Aliases: Prometheus Evanston flagship campus; Wyoming Hyperscale Whitebox (original project name)“Launched around 2020 and formally known as Wyoming Hyperscale Whitebox, Prometheus was relaunched in September 2024”News report · June 2026 · grade C
- Land control: Data center site is on the Thornock family ranch at Aspen Mountain (family homestead since 1869; the building parcel was bought by the founder's father at auction in 1990) - developer-affiliated land, no ar“The actual parcel of land we're building on was bought by my dad at auction in 1990”News report · May 2025 · grade C
- Acres: 58 acres“Wyoming Hyperscale has been building a data center campus on 58 acres of land on Aspen Mountain”News report · Sept. 2024 · grade C
- Address: Aspen Mountain, southeast of Evanston, Uinta County, WY - on the Thornock family ranch“Wyoming Hyperscale is building a data center campus on 58 acres of land on Aspen Mountain, a remote site southeast of Evanston in Wyoming”News report · May 2024 · grade C
Imagery and records: Satellite imagery: Maxar via Esri World Imagery Wayback.