Project Cornmaze
Beloit, Rock County, WIDeveloper: Panattoni Development
- Rumored
- Proposed
- Approved
- Under construction
- Operating
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Project Cornmaze is a proposed data center campus of four buildings on more than 430 acres at a gravel quarry across the towns of Beloit and Turtle in Rock County, Wisconsin. It was first pursued under Cambrin LLC through a July 2025 pre-development agreement with the Town of Beloit, and Panattoni, which says it is a $1 billion project, has since taken it over. The end user has not been disclosed.
- Stated investment
- $1 billion[4]
Key facts
Size & schedule
| Planned capacity | hundreds of megawatts [4] developer did not give a specific figure Source excerpt“He couldn't yet provide specifics on electricity and water usage, but the VP suggested energy could head into the hundreds of megawatts.” |
|---|---|
| Site size | 430 acres [4] more than 430 acres Source excerpt“Panattoni's project for the Beloit area looks to build a data center campus of 4 buildings across more than 430 acres at a gravel quarry.” |
| Floor area | 2 million sq ft [4] footprint may exceed 2 million sq. ft. Source excerpt“The developer noted its footprint may exceed 2 million sq. ft. — larger than Chicago's Soldier Field and Wrigley Field combined.” |
| Buildings | 4 [4]Source excerpt“Panattoni's project for the Beloit area looks to build a data center campus of 4 buildings across more than 430 acres at a gravel quarry.” |
| Stated investment | $1 billion [4] |
How big is that? Data center sizes compared with football fields and Central Park.
Water
| Cooling | closed-loop water cooling (developer claim) [4] |
|---|
Money & incentives
| Payments / community benefits | Pre-development agreement: developer reimburses the Town of Beloit up to $175,000 for costs [1]Source excerpt“Under the agreement, the developer will also reimburse the town up to $175,000 for costs incurred associated with the development.” |
|---|
Local decisions & site
| Parcel / address | Land between Town Line Road, South Prairie Avenue and East Philhower Road [2]Source excerpt“the data center could be developed on 430 acres of land located between Town Line Road, South Prairie Avenue, and East Philhower Road.” |
|---|
Figures are as stated by the cited source. Where sources disagree, each figure is shown.
Water and power
Water
Not disclosed. No source reviewed gives a water figure for this site. The Census does not estimate one.
Power
| Planned capacity | hundreds of megawatts [4] |
|---|
Disclosed figures only, each as the cited source states it. Many are projections or permit limits, not metered use. How data center water and power use is measured, and every disclosed figure →
Timeline
Town of Beloit signs pre-development agreement with Cambrin LLC [1]
Pre-development agreement for Project Cornmaze becomes public [2]
Panattoni informs local government it is taking over the project [3]
Panattoni says the Town of Turtle board postponed a cost reimbursement agreement that had been set for its June 9 meeting [3]
Panattoni holds an invite-only gathering on the project [4]
Town of Beloit supervisors reject the cost reimbursement agreement with Panattoni and begin the process toward a 12-month data center moratorium, two days after the Town of Turtle took similar steps [5]
Town of Beloit board votes 4-0 on a resolution calling for a 12-month data center moratorium; a public hearing and an ordinance are still required [6]
Issues raised
- Cambrin LLC shares a name and email address with documents connected to Meta's Beaver Dam data center; Meta has not confirmed it is behind the project [2][3]
- Panattoni says the end user is an American company but has not named it [4]
Issues are concerns and claims raised by the parties, officials or residents named in the cited sources. They are reported as attributed, not as findings by the Census.
Sources
- Town of Beloit has pre-development agreement with company looking to develop data centerWPR · Mar 5, 2026 · news
- Meta signs pre-development agreement for data center in Beloit, WisconsinDCD · Mar 5, 2026 · news
- Developer Panattoni seeks to claw back cash from town of Turtle, Wisconsin, for 430-acre data centerDCD · Jun 9, 2026 · news
- Data center developer sheds light on $1B Beloit project raising community concernWIFR / Rockford News First · Jun 22, 2026 · news
- Town of Beloit follows Turtle's lead, rejects data center cost agreement, votes for moratoriumBeloit Daily News · Aug 3, 2026 · news
- Town of Beloit officially starts data center moratorium processBeloit Daily News · Aug 18, 2026 · news
Cite this page
Last updated Nov 5, 2026. Figures may change as records are updated — include the date you retrieved them.
| APA | Data Center Census. (2026). Project Cornmaze. Retrieved from https://datacentercensus.com/dc/project-cornmaze-town-of-beloit-wi |
|---|---|
| MLA | “Project Cornmaze.” Data Center Census, Nov 5, 2026, https://datacentercensus.com/dc/project-cornmaze-town-of-beloit-wi. |
| Link | https://datacentercensus.com/dc/project-cornmaze-town-of-beloit-wi |
Republishing a figure or table? Attribute it to Data Center Census with a link to this page. The underlying data is downloadable as JSON and CSV; the press kit has standing figures and contact details.