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Data center project · Rock County, Wisconsin

Project Cornmaze, towns of Beloit and Turtle

Paused by moratorium · A four-building hyperscale campus on a 430-acre quarry, first pursued under a nondisclosure agreement, is on hold under moratoriums in both towns. Also known as: Project Cornmaze.

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Status
Paused by moratorium · as of Aug. 17, 2026
Location
Rock Road Companies quarry along South Prairie Avenue, Town Line Road and East Philhower Road, towns of Beloit and Turtle · Rock County
Status note
Both towns have started 12-month moratoriums; no application has been filed.
Power
Not reported
The developer said only that power could reach the hundreds of megawatts; no figure given.
Floor area
2,000,000 sq ft
Land
430 acres
Investment
About $1 billion (developer)
Developer and team
Panattoni Development Co.; Cambrin LLC (earlier)
End user
Unnamed hyperscale customer; Cambrin LLC was linked by reporters to Meta's other data centers
Water
Developer described closed-loop cooling
Evidence
News reports; primary records not yet obtained
Size class
50 MW or more (tracker scope)
Map position approximate, from the reported address or area. Updated Oct. 17, 2026.

Updates, newest first

  1. Aug. 17, 2026 The Town of Beloit board voted 4-0 for a 12-month moratorium resolution, after rejecting a cost-reimbursement agreement earlier in the month. (Beloit Daily News, Aug. 18, 2026)
  2. July 29, 2026 The Town of Turtle board rejected a revised cost-reimbursement agreement and began a 12-month moratorium. (WIFR 23 News, July 30, 2026)
  3. June 22, 2026 Panattoni presented the plan: four buildings, more than 2 million square feet, about $1 billion. (WIFR 23 News, June 23, 2026)
  4. May 19, 2026 Baxtel reported Panattoni had told the town it was taking over the project. (Baxtel, May 19, 2026)
  5. March 4, 2026 The Town of Beloit confirmed a pre-development agreement with Cambrin LLC, signed July 15, 2025, after a nondisclosure agreement signed Feb. 6, 2025. (Beloit Daily News, March 4, 2026; WKOW 27 News, March 4, 2026)

Conflicts and open questions

  • Neither town had adopted a final moratorium ordinance as of the sources opened; both still need a public hearing and an ordinance.

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