Data Center Registry
Stargate Lighthouse Campus
Port Washington, Ozaukee County, Wisconsin · All 20 Vantage Data Centers sites · Every Vantage Data Centers case on our tracker
Stargate Lighthouse Campus is a data center under construction in Port Washington, Wisconsin (Ozaukee County), operated by Vantage Data Centers. The public record puts it at announced 2025, 902 MW planned, 672 acres, a reported $15 billion investment. It is or has been the subject of litigation over its siting, permitting, or operation.
Every line on this page traces to a public source listed at the bottom. Where a figure was looked for and not found, the row says so. A blank is never a zero.
What our reporting adds
Our case file documents this site. Both suits pending. The base record lists the reception as contested; the case record sets it to litigation.
Facility record
Under construction
- Operator
- Vantage Data Centers
- Facility type
- Data center, AI use confirmed
- Location
- Between I-43, Dixie Road, and the Ozaukee Interurban Trail, north of the city of Port Washington, Port Washington, Ozaukee County, WI
- Coordinates
- 43.3882, -87.8753
- Power capacity
- 902 MW planned
- Land
- 672 acres
- Investment
- $15 billion
- Announced
- 2025
- Utility
- We Energies (WEC Energy Group)
- Power source
- Mixed
- Cooling
- Closed loop
- Water use
- Not established from a public source
- Jobs
- 1,000 permanent; 4,000 construction
- Public subsidy
- Tax Incremental District No. 5 (TID 5; ~$458.6M projected expenditure, mostly developer-reimbursement), Port Washington, Wisconsin, 2025
- Community reception
- In litigation
- Source confidence
- Reported by at least one credible outlet or filing
Timeline from the record
Newest first. Record entries come from the filings and reports the registry cites. Coverage entries are headlines from publisher feeds we monitor daily, linked to the outlet; last checked September 14, 2026.
- December 2025Under constructionGround broken; foundation work visible in satellite imagery; Phase 1 ($8B) targeted 2028 Source: Data Center Knowledge
- 2025ProposedAnnounced as Stargate Wisconsin site; $15B, 4-building campus on 674 acres north of Milwaukee Source: Vantage Data Centers
Opposition and litigation at this site
Yes. Stargate Lighthouse Campus in Port Washington, Ozaukee County, Wisconsin is or has been the subject of litigation over its siting, permitting, or operation. Both suits pending.
How the community has taken it
Reception is a sourced signal, not an editorial judgment: in litigation means the facility is or has been the subject of a lawsuit related to its siting, permitting, or operation.
Both suits pending. Vantage data center, Port Washington, Wisconsin. An April 2026 referendum passed (~66%) requiring voter approval for future TIDs over $10M; Marquette polling found ~70% believe data-center costs outweigh benefits (the biggest sentiment shift in 14 years of polling); Great Lakes Neighbors United sued over the TID's legality. The existing TID 5 stands.
Power and water
Vantage commits to '100% Matched Zero-Emission Energy' via solar, wind, and battery storage; the four buildings need ~1.3 GW, served under a dedicated We Energies rate with Vantage underwriting the power infrastructure. A $1.4B transmission line was proposed by American Transmission Co.
Closed-loop liquid cooling using minimal water; Vantage commits to 'water positivity,' restoring more water than the campus consumes.
Public money on the record
| Program | Amount | Granted by | Year |
|---|---|---|---|
| Tax Incremental District No. 5 (TID 5; ~$458.6M projected expenditure, mostly developer-reimbursement) | $458 million | Port Washington, Wisconsin | 2025 |
Our reporting on this site
- The Port Washington Lawsuits · Active litigation
Other sites within 30 miles
Distances are between recorded coordinates, many of which are a city or county centroid, so treat them as approximate. Cumulative load on one utility and one aquifer is the question a planning commission rarely asks.
- Data Holdings Milwaukee Data Center · Milwaukee · Data Holdings LLC24 mi · Operating · 10 MW
- TierPoint Milwaukee · Milwaukee · TierPoint27 mi · Operating
Questions people ask about this site
Is there opposition to the Stargate Lighthouse Campus in Port Washington?
Yes. Stargate Lighthouse Campus in Port Washington, Ozaukee County, Wisconsin is or has been the subject of litigation over its siting, permitting, or operation. Both suits pending.
Has anyone filed a lawsuit over the Stargate Lighthouse Campus?
Yes. This site is recorded as being in litigation. The case, the court, and the filings we hold are listed on this page under the timeline and the sources.
How much water does Stargate Lighthouse Campus use?
No water withdrawal figure for Stargate Lighthouse Campus is on record here. Cooling is recorded as closed_loop, which is the strongest available clue: closed loop and air cooled plant draw far less than evaporative cooling. We leave the number blank rather than estimate one.
Who operates Stargate Lighthouse Campus, and how big is it?
Vantage Data Centers is the operator on record. We hold 20 sites for that company across the registry. Capacity on record is 902 MW. The site is recorded at 672 acres.
How to cite this page
SueDataCenters.org Data Center Registry, "Stargate Lighthouse Campus," updated September 10, 2026, https://suedatacenters.org/data-centers/stargate-port-washington-wi.
Facility data from Compute Atlas (E. Kubiak), version 1.32.0 (September 7, 2026), licensed CC BY 4.0, record https://www.compute-atlas.com/facilities/stargate-port-washington-wi, retrieved September 14, 2026.
Corrections with a public source are welcome at the Compute Atlas record or through our contact page. The whole registry is available as CSV and JSON under CC BY 4.0.
Sources for this record
As compiled and cited by Compute Atlas, with our own reporting appended. Archived links are used where the original has moved.
- 1.OpenAI, Oracle, and Vantage Data Centers Announce Stargate Site in Wisconsin, Vantage · Vantage Data Centers · retrieved July 5, 2026
- 2.Vantage Breaks Ground on $15B Stargate Campus in Wisconsin, Data Center Knowledge · Data Center Knowledge · retrieved July 5, 2026
- 3.$15B Stargate data center breaks ground in Wisconsin · Construction Dive · retrieved July 6, 2026
- 4.Did Port Washington voters stop a $458 million data center project? · Wisconsin Watch · retrieved July 6, 2026
- 5.Port Washington voters pass referendum fueled by concerns about data center project · Wisconsin Public Radio · retrieved July 6, 2026
- 6.OpenAI, Oracle and Vantage Data Centers Announce Stargate Data Center Site in Wisconsin · Vantage Data Centers · retrieved August 4, 2026
- 7.Groundbreaking held as construction begins on $15 billion Port Washington data center · BizTimes Milwaukee · retrieved August 4, 2026
- 8.Large data center may be coming to Port Washington · Wisconsin Public Radio · retrieved September 10, 2026
- 9.Tech giant sues Wisconsin regulator over data center restrictions · The Daily Reporter · retrieved September 10, 2026
- 10.Groups sue Wisconsin DNR over environmental review of Port Washington data centers · Wisconsin Public Radio · retrieved September 10, 2026
- 11.The Port Washington Lawsuits: An Environmental Review Reversal and Closed-Door Negotiations Over the Vantage Data Center · SueDataCenters.org · retrieved August 28, 2026
- 12.FOX6 Milwaukee: Port Washington data center lawsuit alleges open meetings violations · fox6now.com · retrieved August 28, 2026
- 13.Wisconsin Watch: Latest Wisconsin data center news you might have missed (April 2026) · wisconsinwatch.org · retrieved August 28, 2026
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