Prometheus Hyperscale data center on Falls Ranch between Casper and Glenrock
Also called: Prometheus Casper
Prometheus Hyperscale plans a 1.25-gigawatt data center on about 640 acres, plus about 300 acres for a gas power plant, southeast of Casper. It says it would use little water. The county has not voted on any permit.
Where things stand: Company presented plans to county commissioners in September 2026. No permit yet.
🕒 Latest update (Sept 1, 2026): Prometheus outlined the project at a Natrona County Commission information session.
What we know
- 📍 WhereFalls Ranch southeast of Casper, south of I-25, west of Big Muddy Creek, Unincorporated Natrona County, Natrona County
- 🏢 CompanyPrometheus Hyperscale
- 🌳 Size940 acres
- ⚡ Power it needs1,250 megawatts (about as much as 1,000,000 homes)
- 🔌 Where the power comes fromNatural gas engines and turbines on site, with gas through a Black Hills Energy line. The company would not promise all phases stay off the grid.
- 💧 Wateron-site wells for offices; no city water (company)
- ❄️ Coolingclosed loop with 75% water and 25% propylene glycol (company)
- 💵 Cost$16 billion
- 👷 Jobs promised150
❓ Still unanswered
Nobody has answered these in public yet. Can you help find out?
- Does any part of the project sit in Converse County? 🙋 I'll find out
- Which permits will Natrona County require, and when is the hearing? 🙋 I'll find out
- Which company will use it? 🙋 I'll find out
- Where exactly is the site? A parcel number, address or agenda link helps. 🙋 I'll find out
🔎 What we checked
- Oct 8, 2026: We checked the news reports and the 2020 state parcel map for an exact site: none gives a parcel, address or road corner.
What happened so far
- Oct 2025Prometheus signed a deal for a ranch site near Casper, which earlier reporting said reaches into Converse County.
- May 19, 2026Converse County commissioners undid an April vote that set up an industrial park near the county line, after the state Attorney General's office objected.
- Sept 1, 2026Prometheus outlined the project at a Natrona County Commission information session.
Local votes and rules
📌 Other
On April 21, 2026, county commissioners passed a resolution to set up industrial parks that could skip the state siting review. On May 19 they took it back after the state Attorney General's office said a county without zoning can't do this. The county has no land zoning.
Drag the slider to compare the land before and now.
Where this comes from
- Casper Lands Massive 1.5-Gigawatt Data Center Project on Nearby Ranch · Cowboy State Daily · Oct 9, 2025
- After Attorney General Says Don't, Converse County Won't Fast-Track Data Centers · Cowboy State Daily · May 21, 2026
- Natrona County Residents Pack Meeting To Hear Plans For Huge 1.25-GW Data Center · Cowboy State Daily · Sept 2, 2026
- Prometheus Pushes Ahead On $32B Wyoming Data Centers As Legal Challenge Fades · Cowboy State Daily · Aug 25, 2026
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