Data Center Registry

Stargate Lighthouse Campus

Port Washington, Ozaukee County, Wisconsin · All 21 Vantage Data Centers sites · Every Vantage Data Centers case on our tracker

Under constructionIn litigationAI confirmedRecord updated October 16, 2026

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, 53074
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 2025
Under construction
Ground broken; foundation work visible in satellite imagery; Phase 1 ($8B) targeted 2028 Source: Data Center Knowledge
2025
Proposed
Announced 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.

Source: Wisconsin Public Radio

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

Notes on the record

The planned 902 MW is the campus's IT capacity, per Data Center Knowledge (December 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.

ISCorp Mequon Data Center (MQS5) · Mequon · ISCorp13 mi · Operating
Aventus Lakes Data Center · Milwaukee · Aventus Data Centers18 mi · Operating
Midtown Center Computing Facility (Former Walmart, 5825 W. Hope Ave.) · Milwaukee · AFS Milwaukee LLC21 mi · Cancelled · 10 MW
Data Holdings Milwaukee Data Center · Milwaukee · Data Holdings LLC24 mi · Operating · 10 MW
Wells Interconnection Data Center (Wells Building) · Milwaukee · Wells Interconnection24 mi · Operating
TierPoint Milwaukee · Milwaukee · TierPoint27 mi · Operating
N15W24250 Riverwood Drive Data Centre (Pewaukee) · Pewaukee · Mapletree Redwood Data Centre Trust29 mi · Operating

Tell us about your situation

Living near Stargate Lighthouse Campus?

Tell us the basics. Where a participating attorney in your state is available, we may share your information with them with your consent. Free, no obligation, and no guarantee anyone will contact you.

By checking this box and submitting this form, I provide my electronic signature and my express written consent to receive calls and text messages about my potential claim from SueDataCenters.org (Theory Road LLC) and, where one is available for my situation, a participating attorney or law firm or their agents at the phone number I provided, including calls and texts made using an automatic telephone dialing system or an artificial or prerecorded voice, even if my number is on a federal, state, or company Do Not Call list. My consent is not a condition of submitting this form or of purchasing any goods or services. Message frequency varies, message and data rates may apply, and I can reply STOP to opt out or HELP for help at any time. I agree to the Privacy Policy and Advertising Disclosure and understand my information may be shared with a participating attorney, and with the other parties described there, as those documents explain. Submitting does not create an attorney-client relationship, and no one is guaranteed to contact me. See our Privacy Policy and Advertising Disclosure.

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 21 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 October 16, 2026, https://suedatacenters.org/data-centers/stargate-port-washington-wi.

Facility data from Compute Atlas (E. Kubiak), version 1.34.1 (October 4, 2026), licensed CC BY 4.0, record https://www.compute-atlas.com/facilities/stargate-port-washington-wi, retrieved October 29, 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 August 4, 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.Groundbreaking held as construction begins on $15 billion Port Washington data center · BizTimes Milwaukee · retrieved August 4, 2026
7.Large data center may be coming to Port Washington · Wisconsin Public Radio · retrieved September 10, 2026
8.Tech giant sues Wisconsin regulator over data center restrictions · The Daily Reporter · retrieved September 10, 2026
9.Groups sue Wisconsin DNR over environmental review of Port Washington data centers · Wisconsin Public Radio · retrieved September 10, 2026
10.DOR Qualified Data Center Exemption, Oracle America Cloud Services LLC (formerly Green Chile Ventures, LLC), Port Washington, WI: "Four data center buildings at 531, 533, 701, and 723 E. Lake Drive", certified 10/31/2025 · Wisconsin Department of Revenue · retrieved September 13, 2026 · original offline, archived copy from October 21, 2026
11.OpenStreetMap/Nominatim geocode of Lake Drive, Town of Port Washington, Ozaukee County, WI 53074 (postal code provenance) · OpenStreetMap contributors · retrieved September 13, 2026
12.The Port Washington Lawsuits: An Environmental Review Reversal and Closed-Door Negotiations Over the Vantage Data Center · SueDataCenters.org · retrieved August 28, 2026
13.FOX6 Milwaukee: Port Washington data center lawsuit alleges open meetings violations · fox6now.com · retrieved August 28, 2026
14.Wisconsin Watch: Latest Wisconsin data center news you might have missed (April 2026) · wisconsinwatch.org · retrieved August 28, 2026

Is a data center disrupting your home?

Tell us what is happening. Where a participating attorney who handles data center cases in your state is available, we may share your information with them with your consent. It is free and carries no obligation, but we cannot promise that anyone will contact you.

Tell us about your situation
|
Independent attorneys
|
No obligation

Tell us about your situation Do I even have a case?

Attorney or law firm handling data center matters? Speak with us