← Infrastructure/OpenAI Stargate Lighthouse (Port Washington, Wisconsin)

OpenAI Stargate Lighthouse (Port Washington, Wisconsin)

D

Southeast Wisconsin, US · US · OpenAI Inc.

Under ConstructionExplicit AI InfrastructureUnder Review

Environment

Water Stress
lowB

WRI Aqueduct 4.0, 2023, 2023

Aquifer Stress
Not DisclosedND
Grid Carbon Intensity
626 gCO₂/kWhA

EPA eGrid 2022, MROE subregion, 2022

Drought Risk
low

NOAA Palmer Drought Severity Index, 2023

Facility

CompanyOpenAI Inc.
OperatorVantage Data Centers (developer); Oracle (tenant); OpenAI
CategoryExplicit AI Infrastructure
StatusUnder Construction
Planned Year2028
Capacity
1000 MWC

Vantage 'Lighthouse' campus for OpenAI/Oracle with four data centers, ~2.5M sq ft, targeted near 1 GW. Vantage broke ground December 2025; Epoch AI reports foundation work visible with Q4 2028 projected completion. Vantage will underwrite power infrastructure and buy renewable energy to match annual consumption. Capacity sources range from 902 MW to 1.3 GW; 1,000 MW used as midpoint of 'close to a gigawatt'.

Location
43.3894, -87.8754 · US
Campus AreaPort Washington town centre; ~672-acre campus near I-43 about 27 miles north of Milwaukee per one report.
RegionSoutheast Wisconsin, US
Research statusUnder Review

Evidence (1 source)

OpenAI Stargate: where the US sites standMed trust
Academic2026-04-17

Project status as of 2026-10-26

Lighthouse, Port Washington, WI. 1.3 GW projected; developer Vantage; broken ground; Q4 2028 projected completion; foundation work visible; 70% of power drawn from solar, wind, and battery storage.

Community

Community concerns on record

Closed-loop liquid cooling is claimed to limit water use; no organised opposition found in sources reviewed.

Community flags document events recorded in public sources. They do not imply causal attribution or ongoing harm.

Researcher Notes

Added 2026-10-26 from online research; coordinates are town-level unless noted.

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