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OpenAI Stargate Wisconsin

Under constructionAI campusCampusOzaukee County, Wisconsin
60% profile completeness
42 claims from 11 sources
Current facility power
Not yet sourced
Planned capacity
1.3 GW[1][4][2]
Likelyestimated
Floor area
Not yet sourced
Buildings (planned)
3[1]
LikelyderivedDisputed
Capital cost / investment
$15B[2]
Likely
First operational
Dec 31, 2028[1]
Speculativeestimated

POWER & GRID

Time-to-power · verification · interconnection
Time to power
H1 2028 – H2 2029
Medium confidencewindow, not a prediction
Project verification
Grid-backed
Construction documented by satellite imagery; grid record on file.
Current stage
Under construction
Furthest stage with documented evidence
Utility · ISO
We Energies · MISO
Substation: Not identified

Power reality

Announced
1.3 GW[4]
Reported by Edison Electric Institute
Interconnection request
No record
Contracted / approved
No record
Under construction
1.3 GW[1]
Buildings 1–4 under construction (satellite-tracked phases)
Operational
No record
  • ⚠ No permit record linked to this site yet.
AI evidence brief
Summarizes only the evidence on this page. Answers citing anything else are rejected automatically.
How the time-to-power window was estimated
Evidence used
  • Current stage: Under construction (furthest stage with documented evidence)[1]
  • Construction elapsed: Construction documented since 2026-01-02 (0.7 years).
  • Stated date: Next projected milestone: 2028-12-31 (modeled/speculative)[1]
  • Required: 1.3 GW
Assumptions
  • From “Under construction”, large loads have typically taken 0.5–2 more years to first power (editorial range; see Methodology).
  • Construction to first power typically takes 1.25–2.5 years.
  • The window is a range of plausible outcomes under these assumptions, not a forecast. It moves as new filings, queue updates or imagery arrive.
Window: H1 2028 – H2 2029

Project verification

Development
  1. AnnouncedOct 22, 2025
    News report · Utility filing / announcement
    • Oct 22, 2025 · Announcement date reported[3]
    • 2026 · Planned capacity reported: 1300 MW[2]
    • Sep 11, 2026 · Planned capacity reported: 1300 MW[4]
  2. Land acquiredimplied by a later stage
  3. Planning / zoningimplied by a later stage
  4. Permittingimplied by a later stage
Grid interconnection
  1. Interconnection application2026
    News report
    • 2026 · proposed $1.4B transmission line from American Transmission Co.[2]
  2. Feasibility study
  3. System impact study
  4. Facilities study
  5. Interconnection agreement / service contract
Build & energization
  1. Financing
  2. Under constructionJan 2, 2026
    Model estimate · Satellite imagery
    • Jan 2, 2026 · Reported status: under construction[1]
    • Jan 2, 2026 · Construction start[1]
    • Jan 2, 2026 · Ground broken for the facility, land clearing begins for all buildings[1]
  3. Energization
  4. Operational

● documented · ◌ implied by a later stage · ○ no evidence found. Dates are those of the earliest dated evidence, which can be later than when a stage actually began. Evidence classes: News report, Utility filing / announcement, Model estimate, Satellite imagery.

Grid path

  1. facility
    OpenAI Stargate Wisconsin
  2. substation
    Not identified
    UnknownUnverified
    No substation mapped within 3 km and none named in filings.
  3. transmission
    Not identified
    UnknownUnverified
    No transmission line mapped within 2 km.
  4. utility
    We Energies[4][2]
    DocumentedConfirmed
    Named in a source
  5. ISO / RTO
    MISO[5]
    Service territoryLikely
    Balancing authority: MISO
Substation capacity:
not published
Required upgrades:
Vantage funding $175 million of regional infrastructure upgrades[4]
Congestion:
not yet sourced (no nodal price data)

Dashed boxes are based on proximity only and do not establish which asset serves the site.

Interconnection records

No interconnection-queue record is linked to this site. Of the ISOs we ingest, only NYISO publishes large-load requests; PJM, ERCOT, MISO, SPP and CAISO queues list generation only.

On-site & dedicated generation

No on-site, behind-the-meter or dedicated generation found in sources.

Location & imagery

Mapped outline
Coordinates
43.43160, -87.85642
County
Ozaukee County
Photographs

No openly licensed ground-level photos matched to this site yet.

Ownership, operation & customers

  1. 1. Property owner of record
    Not identified
  2. 2. Owner / developer
    Oracle[1]
    Vantage Data Centers[2][3]Likely
  3. 3. Operator
    Not identified
  4. 4. Tenant / cloud
    Not identified
  5. 5. End customer / workload
    OpenAI[1]
Power supply
Utility:
We Energies[4][2]
Energy partner:
WEC Energy Group(unreviewed)[3]Likely
Capital & construction
Investor:
OpenAI[2]Likely

Each link is sourced separately. The property owner of record is often a special-purpose entity; the same company appearing in two roles is shown only when sources say so.

All parties with evidence
Owner
Oracle[1]Confirmed
Developer
Vantage Data Centers[2][3]Likely

“Vantage Data Centers, which was previously the only known company behind the project, had originally said it would spend $8 billion on the development.”

End user
OpenAI[1]Confirmed
Utility
We Energies[4][2]Confirmed

“We Energies (WEC Energy Group) OpenAI, Oracle, Vantage Data Centers / Data Center Port Washington, WI” Listed by EEI under this member utility.

Energy partner
WEC Energy Group(unreviewed)[3]Likely

“Vantage is underwriting 100% of the power infrastructure investment with a dedicated electricity rate from WEC Energy Group utility We Energies.”

Investor
OpenAI[2]Likely

“the three companies said they now plan to invest more than $15 billion at the campus”

Power (all fields)

Planned capacity
1.3 GW[1][4][2]Likely

Projected facility power at the last tracked milestone (2028-12-31); not necessarily full build-out.

“$15 billion, 1,300 MW data center campus as part of "Stargate" initiative.”

“The four data center buildings are expected to need 1.3 gigawatts of electricity.”

Current facility power
Not yet sourced

Capacity figures are nameplate or contracted; annual consumption is a labeled model estimate, not metered data.

Grid & electricity

ISO / RTO
MISO[5]Likelyderived

Location falls inside this ISO/RTO footprint.

Balancing authority
MISO[6]Likelyderived

Control area of the containing utility territory.

Interconnection status
proposed $1.4B transmission line from American Transmission Co.[2]LikelyAI-extracted

“A $1.4 billion transmission line project from American Transmission Co. is being proposed to help support the project.”

Required grid upgrades
Vantage funding $175 million of regional infrastructure upgrades[4]Likely

“Vantage will invest $175 million in regional infrastructure upgrades.”

State avg. industrial price
10.46¢/kWh[8]Confirmed

Wisconsin statewide average, July 2026.

State avg. commercial price
13.93¢/kWh[8]Confirmed

Wisconsin statewide average, July 2026.

Generation within 50 km
2.74 GW[9]Confirmedderived

17 EIA-reported plants within 50 km.

Generation queued in county
200 MW[7]Confirmedderived

1 active generation interconnection requests in Ozaukee County: Storage 200 MW. Queued projects often don't get built.

Contracted / committed power
Not yet sourced
Nearby infrastructureTypeDistanceVoltage / capacitySource
Port Washington Generating Station · Wisconsin Electric Power CoPower plant (Natural Gas)5.4 km1.24 GW[9]
Onion River · Wisconsin Power & Light CoPower plant (Solar)19 km150 MW[9]
Edgewater · Wisconsin Power & Light CoPower plant (Coal)33.8 km405 MW[9]
Germantown · Wisconsin Electric Power CoPower plant (Petroleum)35.4 km255 MW[9]
Sheboygan Falls · Wisconsin Power & Light CoPower plant (Natural Gas)35.6 km298 MW[9]
Valley (Wi) · Wisconsin Electric Power CoPower plant (Natural Gas)45 km267 MW[9]
Mmsd Jones Island Wastewater · Milwaukee Metro Sewerage DistPower plant (Natural Gas)45.8 km27 MW[9]
Cedar Ridge · Wisconsin Power & Light CoPower plant (Wind)47.9 km68 MW[9]
Largest queued generation in this countyFuelQueue statusMWSource
J3784 at Saukville (Cedarsauk)MISO J3784StorageIn study · proposed 2028-06200 MW[7]

Utility, ISO and nearby assets are derived from the site's location. Proximity to a substation or line doesn't establish the interconnection; that needs a utility filing or interconnection-queue record. Queue requests are applications, not commitments — most never reach operation.

Construction & permitting

  1. Announced
    Oct 22, 2025[3]
  2. Land acquired
    —
  3. Permitting
    —
  4. Construction start
    Jan 2, 2026[1]
  5. First operational
    Dec 31, 2028[1]
    Projected
  6. Expected completion
    2028[2][3]
Planned capacity
1.3 GW[1][4][2]Likely

Projected facility power at the last tracked milestone (2028-12-31); not necessarily full build-out.

“$15 billion, 1,300 MW data center campus as part of "Stargate" initiative.”

“The four data center buildings are expected to need 1.3 gigawatts of electricity.”

Buildings (planned)
3[1]Likelyderived

Count of building outlines traced on satellite imagery.

Sources disagree. Also reported: 4[2][3] (likely)
Buildings operational
0[1]Likelyestimated
PhaseStatusAdded MWCompleted / expectedSource
Buildings 1–4under construction1.3 GWDec 31, 2028 (projected)[1]

Real estate

Official assessments
Assessor's value for a tax year

None sourced yet

Recorded transactions
Sale prices from recorded deeds

None sourced yet

Model estimates
Our model — not an appraisal

None sourced yet

Site area
672 acres[3]LikelyAI-extracted

“Vantage is developing 500 of 672 total acres for the four data centers”

Sources disagree. Also reported: 670 acres[2] (likely)
Capital cost / investment
$15B[2]LikelyAI-extracted

“they now plan to invest more than $15 billion at the campus”

Annual property tax
Not yet sourced

No county parcel or assessor records linked yet. County records are currently ingested for Loudoun County, VA and Maricopa County, AZ.

Size

Floor area
Not yet sourced

Compute

Project
Stargate[1][2]Confirmed

“The Port Washington location is part of the companies’ Stargate program, a $500 billion national push to expand AI.”

What changed (last 3 years)

Follow this facility (RSS)
  • Buildings (planned)
    42026[2]→3Jul 24, 2026[1]→4Sep 27, 2026[3]
  • Status
    Planned2026[2]→Under constructionJan 2, 2026[1]
  • Expected completion
    20282026[2]→Dec 31, 2028Jul 24, 2026[1]→2028Sep 27, 2026[3]

Timeline

Announced: Oct 22, 2025[3]
Construction start: Jan 2, 2026[1]
First operational: Dec 31, 2028[1]
  1. Jan 2, 2026[1]

    Ground broken for the facility, land clearing begins for all buildings

  2. Feb 14, 2026[1]

    Land clearing continues, foundation construction clearly begins for eastern and northern buildings (Building 1-2)

  3. Jul 24, 2026[1]

    Construction continues, Buildings 1 and 2 appear roughly halfway roofed, and building 3 foundation is halfway done.

  4. Dec 31, 2028Projected1.3 GW facility power· 4 buildings operational[1]

    Building 4 and supporting facilities/buildings operational, whole facility now operational. Based on the environmental analysis (page 6) filed for the site.

All claims (provenance audit)

42
FieldValueSourceConfidenceAs ofStatus
NameOpenAI Stargate Wisconsin[1] Likely2026-07-24Shown
StatusUnder construction[1] derivedLikely2026-01-02Superseded / alternative
StatusUnder construction[1] derivedLikely2026-02-14Superseded / alternative
StatusUnder construction[1] derivedLikely2026-07-24Shown
StatusPlanned[2] AI-extractedLikely2026Superseded / alternative
Facility typeAI campus[1] derivedLikely2026-07-24Shown
ProjectStargate[1] Confirmed2026-07-24Shown
ProjectStargate[2] AI-extractedLikely2026Shown
OwnerOracleOwner: Oracle[1] Confirmed2026-07-24Shown
DeveloperVantage Data Centers[2] AI-extractedLikely2025-10-23Shown
DeveloperVantage Data Centers[3] AI-extractedLikely2026-09-27Shown
End usersOpenAIUsers: OpenAI[1] Confirmed2026-07-24Shown
UtilityWe Energies[4] Confirmed2026-09-11Shown
UtilityWe Energies[2] AI-extractedLikely2025-10-23Shown
Energy partnersWEC Energy Group[3] AI-extractedLikely2026-09-27Shown
InvestorsOpenAI[2] AI-extractedLikely2025-10-23Shown
Planned capacity1.3 GW[1] estimatedLikely2026-07-24Shown
Planned capacity1.3 GW[4] Likely2026-09-11Shown
Planned capacity1.3 GW[2] AI-extractedLikely2026Shown
ISO / RTOMISOMIDCONTINENT INDEPENDENT TRANSMISSION SYSTEM OPERATOR, INC..[5] derivedLikely—Shown
Balancing authorityMISO[6] derivedLikely—Shown
Interconnection statusproposed $1.4B transmission line from American Transmission Co.[2] AI-extractedLikely2026Shown
Required grid upgradesVantage funding $175 million of regional infrastructure upgrades[4] Likely2026-09-11Shown
Generation queued in county200 MW[7] derivedConfirmed2026-09-27Shown
State avg. industrial price10.46¢/kWh[8] Confirmed2026-07Shown
State avg. commercial price13.93¢/kWh[8] Confirmed2026-07Shown
Generation within 50 km2.74 GW[9] derivedConfirmed202502Shown
Buildings (planned)3[1] derivedLikely2026-07-24Shown
Buildings (planned)4[2] AI-extractedLikely2026Superseded / alternative
Buildings (planned)4[3] AI-extractedLikely2026-09-27Superseded / alternative
Buildings operational0[1] estimatedLikely2026-07-24Shown
Buildings operational0[1] estimatedLikely2026-01-02Superseded / alternative
Buildings operational0[1] estimatedLikely2026-02-14Superseded / alternative
Site area670 acres[2] AI-extractedLikely2026Superseded / alternative
Site area672 acres[3] AI-extractedLikely2026-09-27Shown
Capital cost / investment$15B[2] AI-extractedLikely2026Shown
AnnouncedOct 22, 2025[3] AI-extractedLikely2026-09-27Shown
Construction startJan 2, 2026[1] derivedLikely2026-07-24Shown
First operationalDec 31, 2028[1] estimatedSpeculative2026-07-24Shown
Expected completionDec 31, 2028[1] estimatedSpeculative2026-07-24Superseded / alternative
Expected completion2028[2] AI-extractedLikely2026Shown
Expected completion2028[3] AI-extractedLikely2026-09-27Shown