Prometheus Hyperscale Evanston Campus
Evanston, Uinta County, WY[8][9]
Also known as Atlas Industrial Park
- Rumored
- Proposed
- Approved
- Under construction
- Operating
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Prometheus Hyperscale plans a 1.25-gigawatt data center campus on 506 acres near Evanston, Wyoming, with power generated on-site from natural gas engines and turbines as an islanded microgrid. In June 2026 the Uinta County Commission unanimously granted the conditional use permit, subject to 15 conditions, and in September 2026 it approved a conditional use permit for the project's independent power production facility.
- Site size
- 506 acres[2]
- Permanent jobs (promised)
- 200
- long-term jobs, per developer presentation
Key facts
Size & schedule
| Planned capacity | 1.25 GW [1] designed for 1.25 GW initial capacity; company describes a development path to 5 GW Source excerpt“The vote represents a significant permitting milestone for the 506-acre site, which is designed for 1.25 GW of initial capacity with a development path to 5 GW.” |
|---|---|
| Site size | 506 acres [2]Source excerpt“The company says it's located on 506 acres that founder Trenton Thornock's family has ranched for six generations.” |
| Permanent jobs (promised) | 200 [5] long-term jobs, per developer presentation Source excerpt“200 long-term jobs for facility technicians, network and data center operations staff” |
| Construction jobs | 3,800 [5] temporary construction jobs, per developer presentation Source excerpt“This project will create 3,800 temporary construction jobs” |
| Construction jobs | 250 [8] up to 250 power facility construction jobs Source excerpt“Up to 250 power facility construction jobs — electricians, iron workers, pipe fitters” |
| Target completion | Construction anticipated to begin within six months of final permitting; full 1.25 GW expected to be built in phases over 48 to 60 months (per company) [1]Source excerpt“Construction is anticipated to begin within six months of final permitting, with the full 1.25 GW campus expected to be built out in phases over 48 to 60 months.” |
How big is that? Data center sizes compared with football fields and Central Park.
Power
| Grid operator | none (off-grid) [1] company says the campus will not connect to the public utility grid Source excerpt“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” |
|---|---|
| Power supply | natural gas (mostly); founder wants to add nuclear eventually [2]Source excerpt“But he said most of its power will come from natural gas, a readily available and relatively clean fossil fuel. Thornock eventually wants to tap nuclear energy too.” |
| On-site generation type | natural gas engines and turbines operated as a fully islanded microgrid [3]Source excerpt“Prometheus said the Evanston campus will operate as a fully islanded microgrid, generating power on-site through natural gas engines and turbines.” |
Water
| Water source | private on-site well [2]Source excerpt“A private, on-site well will supply the data center's plumbing, but Prometheus says it will cool the servers with a water-glycol mixture that lasts six years before it must be changed out.” |
|---|---|
| Cooling | water-glycol mixture [2] company says the mixture lasts six years before it must be changed out |
Local decisions & site
| Deciding vote | Uinta County Commission unanimously granted the conditional use permit, subject to 15 conditions [4]Source excerpt“Ultimately, the commission unanimously approved the conditional use permit with 15 conditions that the developer must meet.” |
|---|---|
| Zoning | Atlas Industrial Park Subdivision rezoned from agricultural to industrial use [7]Source excerpt“In June, the Uinta County Board of County Commissioners approved a zone change from agricultural to industrial use for the Atlas Industrial Park Subdivision.” |
| Noise limit | 60 dBA [4] Permit condition: at the project boundary during the operational phase, with a commercially reasonable attempt to reach 50 dBA Source excerpt“Permittee will ensure emissions at the project boundary of no greater than 60 dBAs [decibels] during the post construction/ operational phase with a commercially reasonable attempt to obtain 50 dBAs” |
Figures are as stated by the cited source. Where sources disagree, each figure is shown.
Water and power
Water
Not disclosed. No source reviewed gives a water figure for this site. The Census does not estimate one.
Disclosed figures only, each as the cited source states it. Many are projections or permit limits, not metered use. How data center water and power use is measured, and every disclosed figure →
Timeline
The company initially planned a 120 MW campus on the site [3]
Uinta County planning commission unanimously recommends zoning and conditional use permit approvals [5]
An industrial subdivision rezone for the project is approved at a meeting in Lyman [4]
Uinta County Board of Commissioners unanimously approves the data center conditional use permit [1]
Three residents petition for review of Uinta County’s permits for the data center, alleging that county commissioners and developers held meetings without advertising them and did not disclose potential family conflicts of interest [9]
Judge James Kaste dismisses the petition, ruling the petitioners did not respond to a motion to dismiss in time and did not show how they would be personally harmed [9]
Uinta County commissioners approve a conditional use permit for the project's independent power production facility [8]
Issues raised
- Permit conditions include beginning construction within five years, a 60 dBA noise limit at the project boundary, and public reporting of annual on-site well water consumption for 10 years [4]
- The developer says ongoing water use, mainly for bathrooms and offices, will be about 15 homes' worth and that no water will be drawn from Uinta County's system [6]
- Some residents presented petitions opposing the permit, citing environmental and financial concerns; others spoke in support [4][6]
- The power facility is to be phased in five stages to match the data center's power needs [8]
Issues are concerns and claims raised by the parties, officials or residents named in the cited sources. They are reported as attributed, not as findings by the Census.
Sources
- Prometheus Hyperscale Secures Unanimous Conditional Use Permit Approval from Uinta County CommissionersPrometheus Hyperscale · Jun 17, 2026 · company
- 1.25GW data center approved on ranchland near Evanston, WyomingKPCW · Jun 19, 2026 · news
- Prometheus Hyperscale secures planning approval for gigawatt data center campus in WyomingDatacenterDynamics · Jun 22, 2026 · news
- Uinta County data center moves forwardWyoFile (Uinta County Herald) · Jun 18, 2026 · news
- Uinta County Planners Give Unanimous OK To 1.25-Gigawatt Prometheus Data CenterCowboy State Daily · May 28, 2026 · news
- Uinta County OKs Huge Data Center, Some Fear They'll Get Left 'Holding The Bag'Cowboy State Daily · Jun 17, 2026 · news
- Pitching 940-acre data center, Prometheus Hyperscale asks Natrona County to bypass state reviewWyoFile (Oil City News) · Sep 2, 2026 · news
- Uinta County approves permit for incoming data center's power gridWyoming News (via NewsBreak) · Sep 17, 2026 · news
- Prometheus Pushes Ahead On $32B Wyoming Data Centers As Legal Challenge FadesCowboy State Daily · Aug 25, 2026 · news
Cite this page
Last updated Oct 13, 2026. Figures may change as records are updated — include the date you retrieved them.
| APA | Data Center Census. (2026). Prometheus Hyperscale Evanston Campus. Retrieved from https://datacentercensus.com/dc/prometheus-hyperscale-evanston-wy |
|---|---|
| MLA | “Prometheus Hyperscale Evanston Campus.” Data Center Census, Oct 13, 2026, https://datacentercensus.com/dc/prometheus-hyperscale-evanston-wy. |
| Link | https://datacentercensus.com/dc/prometheus-hyperscale-evanston-wy |
Republishing a figure or table? Attribute it to Data Center Census with a link to this page. The underlying data is downloadable as JSON and CSV; the press kit has standing figures and contact details.