Project Cornmaze
Janesville, Rock County, WI
Source: Primary source
Project Cornmaze is a proposed data center in Rock County, WI, operated by Cambrin LLC., Meta?.
Reporting by Eric Keller · Updated Jun 18, 2026
Overview
source: linkThe land is currently an active gravel pit operated by Rock Road Companies Inc. Imported from the FracTracker Alliance U.S. Data Centers Tracker after review. Details to be corroborated from primary sources.
Operator chain
- Files asCambrin LLC., Meta?
- This facilityProject Cornmaze
Grid & water — why here
source: HIFLD · EPAThe closest existing grid infrastructure and the municipal water system this location sits in — the same constraints the buildout model screens on (it won't site a campus more than ~2 km from a substation or ~5 km from municipal water). Distances are straight-line to public HIFLD/EPA features, not a metered connection.
In the news
source: Google News- Real estate developer Panattoni takes over Meta-backed data center proposal in southern WisconsinData Center Dynamics· May 19, 2026
- At least 12 data center proposals in Alliant territory, documents showThe Cap Times· May 15, 2026
- Data center town hall hosted in Rock County as two municipalities consider developmentWMTV 15 NEWS· Apr 21, 2026
- Non-disclosure agreement ban proposed for Rock County employees | Local NewsGazetteXtra· Mar 24, 2026
- Beloit data center meeting soothes fears, doesn't go far enough for someBeloit Daily News· Mar 18, 2026
- More than NDAs. Wisconsin communities face scrutiny over data center secrecy.Wisconsin Watch· Mar 16, 2026
Tax breaks & subsidies
source: Good Jobs First / GASB 77No per-deal tax break is linked to this site yet. No state discloses the recipient of a data-center abatement at the facility level, so per-site deals are rare in the public record. If you have a development agreement or board resolution for this site, send it to us.
Wisconsin reported $40M in Qualified Data Centers sales/use tax exemption (Wis. Stat. § 77.54(70)) for FY2024 (Wisconsin Department of Revenue). Program-wide, not attributable to this site.
Water use
No public record of this facility's water use. We check state withdrawal reporting for self-supplied sites; municipally supplied sites only become visible through a public-records request to the local water utility — a per-facility request tool is coming. If you have a utility document for this site, send it to us.
EPA permits & violations
source: EPA ECHONo reported violations as of last sync.
Nearest school
source: HIFLD / NCESThe nearest public school, Rock University High in Janesville, is 1.4 mi from this site (91 students).
Schools are sensitive receptors for the noise, backup-generator exhaust, and traffic a large data center brings. Straight-line distance to the nearest public school (HIFLD/NCES, US public schools only).
Hearings timeline
No public-hearing records linked to this site yet. We surface planning-commission and board-of-supervisors dates when a record names a facility. If you know of a hearing on this site, tell us.