Prometheus Hyperscale data center campus east of Evanston
Also called: WY-1, Aspen Mountain
Prometheus Hyperscale plans a 1.25-gigawatt data center on 506 acres of ranch land east of Evanston. It would make its own power from natural gas. The company says building would start within six months of final permits and take four to five years.
Where things stand: County granted a conditional use permit in June 2026. A court tossed a challenge in August. Building has not started.
🕒 Latest update (Aug 17, 2026): A judge dismissed the challenge.
What we know
- 📍 WhereRanch land about 12 miles east of Evanston, south of Interstate 80, Unincorporated Uinta County, Uinta County
- 🏢 CompanyPrometheus Hyperscale
- 🌳 Size506 acres
- ⚡ Power it needs1,250 megawatts (about as much as 1,000,000 homes)
- 🔌 Where the power comes fromMostly natural gas made on site, not from the grid. The company hopes to add nuclear later.
- 💧 Waterprivate on-site well for building plumbing; company says no water from the Bear River
- ❄️ Coolingclosed loop with a water-glycol mix, replaced about every six years and trucked in
- 💵 Cost$16 billion
❓ Still unanswered
Nobody has answered these in public yet. Can you help find out?
- Which tech company will use the Evanston data center? 🙋 I'll find out
- What are the 30 permit conditions? 🙋 I'll find out
- How much gas will the on-site power plant burn, and what air permits are needed? 🙋 I'll find out
What happened so far
- June 2026Uinta County commissioners unanimously granted a conditional use permit with about 30 conditions.
- July 16, 2026Residents asked a court to review the permit.
- Aug 17, 2026A judge dismissed the challenge.
Local votes and rules
⚖️ Court case
Residents asked the district court to review and cancel the county's permits for the Prometheus data center. They said there were secret meetings and conflicts of interest, and that a water study was needed. The county denied this. A judge dismissed the case on Aug. 17, 2026, so the permits stand.
✅ Approved
County commissioners unanimously granted a conditional use permit for Prometheus Hyperscale's 1.25-gigawatt data center on about 506 acres east of Evanston. The permit has about 30 conditions, including dust and noise limits, closed-loop cooling, and protecting local electric rates.
An aerial photo of the area.
Where this comes from
- 1.25GW data center approved on ranchland near Evanston, Wyoming · KPCW · June 19, 2026
- Prometheus Pushes Ahead On $32B Wyoming Data Centers As Legal Challenge Fades · Cowboy State Daily · Aug 25, 2026
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