Proposed
TerraVolt data center campus at Raft River
Also called: Raft River data center campus, Southeast Idaho campus
A California company plans a data center campus with its own gas power plant in the Raft River area of southern Idaho. The first phase would be about 200 to 240 megawatts. The exact site and permits are not public yet.
Where things stand: Early stage. The company signed a gas supply deal in May 2026. No county permit found.
🕒 Latest update (May 12, 2026): TerraVolt announced a firm natural gas supply deal for an on-site power plant.
What we know
- 📍 WhereRaft River area between Twin Falls and Pocatello, on the Northwest gas pipeline (exact site not public), Unincorporated Cassia County, Cassia County
- 🏢 CompanyTerraVolt Infrastructure
- 🏛️ Owned byCalEthos Inc. (Tustin, California)
- ⚡ Power it needs240 megawatts (about as much as 192,000 homes)
- 🔌 Where the power comes fromNew gas power plant on site, not on the grid (first phase 200-240 megawatts).
- 💸 Tax breaksState lawmakers discussed changing the data center sales tax break with this project in mind; the change did not pass in 2026.
❓ Still unanswered
Nobody has answered these in public yet. Can you help find out?
- Where exactly is the site, and is it in Cassia or Power County? 🙋 I'll find out
- Has the company applied to Cassia County or for an air permit? 🙋 I'll find out
- How much water would it use? 🙋 I'll find out
What happened so far
- April 6, 2026State leaders named TerraVolt as the company looking at a Raft River data center.
- May 12, 2026TerraVolt announced a firm natural gas supply deal for an on-site power plant.
🛰️ See it from above
An aerial photo of the area.
We only know the town, so this shows the town center, not the exact site. Photos: USGS The National Map.
Where this comes from
- Legislature leaves big tax breaks for data centers on the books. A Cali. company eyeing large data center could use them · BoiseDev · April 6, 2026
- TerraVolt taps Northwest Pipeline for Idaho AI data center project · Pipeline & Gas Journal · May 12, 2026
- TerraVolt inks natural gas supply deal for onsite power plant at planned data center campus in Idaho · DatacenterDynamics · May 2026
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