Prairie Horizon Data Campus (Beltline Energy) — St. Marys
St. Marys, Pottawatomie County, KS
Prairie Horizon Data Campus (Beltline Energy) — St. Marys is an announced data center project in St. Marys, KS, backed by Beltline Energy. The project is sized at 1,200 MW with an estimated investment of $17 billion. Beltline Energy unveiled Prairie Horizon, a 1.2 GW, ~$17B, 10-15 building data campus near St. Marys in Pottawatomie County on June 10, 2026, leveraging existing transmission. County has published community FAQs; approvals and end operator are unresolved; full buildout targeted 2034. (Source dated 2026-06-10.).
- 1,200 MWPlanned capacity
Project status
- Announced
- Permitting
- Under constructionNot yet
- OperationalNot yet
Recorded changes
Nothing recorded yet. Follow this project to hear when something changes.
Community sentiment
Should this project be built?
What’s next
Election Day is in 10 days.
Latest news
Nothing written about this data center yet.
Stories about it, and about Pottawatomie County, KS, land here.
Records and documentation
Kansas state legislation
- SB553 - Data centers and water use consumption reportingRequires water use consumption reporting related to data centers.Download
- SB 98 (Data Center Sales Tax Exemption)Kansas 2025 law creating a 20-year state and local sales tax exemption for qualifying data centers.Download
- Resolution 2026-4 (Moratorium)Harvey County, Kansas resolution imposing a data center development moratorium, January 13, 2026.Download
- SB400 - Requiring data centers to use closed-loop cooling systems to mitigate water consumption.Description comingDownload
- SB526 - Requiring data centers to be located on land that was zoned for industrial or manufacturing uses or was not zoned on July 1, 2025, to qualify for the sales tax exemption for qualified data centers.Description comingDownload
- SB531 - Prohibiting the development or operation of any new large load data center in a county that has had a drought emergency declared for such county pursuant to the Kansas emergency management act within the preceding three years.Description comingDownload
Site details
- Operator
- Beltline Energy
- County
- Pottawatomie County, KS
- Capacity
- 1,200 MW
- Address
- St. Marys, KS
- Stage
- Announced
Size: not on file
Map
Photos
Google Street View · nearby land, not the exact site
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