Prometheus Hyperscale Evanston Campus
Evanston, Uinta County, WY
Also known as Atlas Industrial Park
- Rumored
- Proposed
- Approved
- Under construction
- Operating
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. The Uinta County Commission unanimously approved the conditional use permit with 15 conditions in June 2026, and approved a conditional use permit for the project's independent power production facility in September 2026.
- Site size
- 506 acres
- 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.” |
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 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.” |
Local decisions & site
| Deciding vote | Uinta County Commission unanimously approved the conditional use permit with 15 conditions [4]Source excerpt“Ultimately, the commission unanimously approved the conditional use permit with 15 conditions that the developer must meet.” |
|---|---|
| Zoning | Zone change from agricultural to industrial use for the Atlas Industrial Park Subdivision [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.” |
Figures are as stated by the cited source. Where sources disagree, each figure is shown.
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]
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]
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
Cite this page
Last updated Sep 22, 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, Sep 22, 2026, https://datacentercensus.com/dc/prometheus-hyperscale-evanston-wy. |
| Link | https://datacentercensus.com/dc/prometheus-hyperscale-evanston-wy |
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