The site
The site from above
12- 1Vantage Lighthouse main build site
OSM construction polygon core - 2The site
From orbit
The site
Satellite views of the same ground on April 29, 2011 and March 11, 2024. Drag to compare.
Power
Power and the grid
Contracted, size not disclosed
We Energies grid servicePlanned, transmission pending
planned supply to the campus; the utility's filings and announcements use 1.3 GW; no campus-specific service agreement is public SEC filing · March 2026
Proposed
Other sources, size not disclosed
- New utility-side wind, solar and batteries Under construction (press)about half of three Invenergy projects (150 MW of solar with 50 MWh of storage, 110 MW of wind and a 75 MW battery) is allocated to this campus; construction began Oct. 2026 News report · Oct. 2026
- Point Beach nuclear subscription (Oracle) Announced, needs approvalreported at 10 to 20% of the plant's output, roughly 125 to 250 MW (press); the companies give no figure; needs state approval News report · Oct. 2026
Backup generators (emergency use, not a power supply)
- Backup diesel generators (45) Permitted87 MW; emergency use only State agency · June 2026
Getting on the grid
Who supplies what, what it costs, and what is still not public.
- Sept. 2025Transmission application filedAmerican Transmission Co. applies for new 345 kV lines and substations in Ozaukee County to serve the campus. News report · Sept. 2025
- April 24, 2026Large-customer tariff approvedState regulators approve We Energies' very large customer tariffs with a 15-year minimum term and a 100 MW threshold. Utility regulator · April 2026
- Aug. 6, 2026Application thrown outRegulators unanimously revoke the completeness of the transmission application after missing and changing information; this is not a denial. see Permits
- Sept. 2026Revised application filedThe transmission company files again under a new docket with revised routes and a proposed Decker substation; Oracle pays $1.1B of the equipment. Company · Sept. 2026
- Oct. 2, 2026Nuclear subscription announcedWe Energies and Oracle announce a deal for part of Point Beach nuclear output, subject to state approval. Company · Oct. 2026
- Not setService agreement: none publicNo campus-specific electric service agreement or contract rate has been filed or made public. Utility regulator · Oct. 2026
- Under the new tariff, large customers pay 100% of the cost of resources built for them, and the state added protections against shifting transmission costs. Utility regulator · April 2026
- An independent analyst expects partial power around Dec. 2027 and the full 1.3 GW around Oct. 2028, against Oracle's guidance of the second half of 2027 (press). News report · Sept. 2026
Grid upgrades
What the grid is building for this load: the asset, its cost, who pays and when it is due to be energized. An upgrade may serve a later phase, not the first building.
- WI Southeast 345 kV competitive project (Project WISE) MTEP App A/B project MTEP LRTP Tranche 2.1 Project WISE - Ozaukee County Transmission Project Substations · status: Substations reassigned to ATC after MISO variance analysis$350M; payer not stated; due to be energized by June 2033. State agency · June 2026
What is next door
Distances from mapped lines and plants. OpenStreetMap · Oct. 2026
Permits
Permits checklist
1 contested · 1 withdrawn · 2 pending · 4 granted
Approvals a campus like this normally needs (including an air permit for backup or on-site generators), and what we found.
- !Tax district (TID No. 5) ContestedCommon Council and Joint Review Board · Nov. 18, 2025: approved; challenged in court by residents News report · Nov. 2025
- ↩Transmission approval (first application) WithdrawnPublic Service Commission of Wisconsin · Aug. 6, 2026: completeness revoked Aug. 6, 2026 and docket closed; not a denial of the project; refiled in a new docket Utility regulator · Aug. 2026
- ◷Transmission approval (revised application) PendingPublic Service Commission of Wisconsin · Sept. 2026: new docket; full environmental impact statement required Utility regulator · Oct. 2026
- ◷Water main to the site PendingPublic Service Commission of Wisconsin · July 2026: 4.2 miles of 16-inch main; application filed Utility regulator · Oct. 2026
- ✓Annexation and campus plan GrantedCity of Port Washington · Sept. 2025: about 1,900 acres moved from the town into the city News report · Sept. 2025
- ✓Development agreement GrantedPort Washington Common Council · Aug. 19, 2025: unanimous; Vantage fronts $175M of infrastructure News report · Aug. 2025
- ✓Environmental review, wetlands and stormwater GrantedWisconsin DNR · Dec. 11, 2025: environmental determination, wetland exemptions and stormwater coverage for the first areas State agency · Dec. 2025
- ✓Air permits for 45 backup generators GrantedWisconsin DNR · June 12, 2026: issued after a hearing; Clean Wisconsin filed comments against the draft State agency · June 2026
Risks
What could slow it down
- HighA grid upgrade gates first powerCampus transmission substations carry a MISO-required in-service date of Dec 10, 2027. The upgrade is not yet in place, so power-on depends on its schedule. State agency · June 2026
- HighTransmission restartedThe line the campus needs was thrown out in Aug. 2026 and refiled with new routes; an outside analyst sees a material risk the campus misses Oracle's second-half 2027 delivery guidance (press). News report · Oct. 2026
- HighNo public power contractNo campus-specific electric service agreement is public, and the Point Beach nuclear deal still needs state approval. Utility regulator · Oct. 2026
- MediumLawsuits and local oppositionThree suits are on record, a mayoral recall fell short, and residents won an Apr. 2026 referendum requiring votes on future large tax districts (it does not affect this one). News report · April 2026
- MediumRatepayer scrutinyRegulators added cost-shifting protections to the utility's large-customer tariff, and Oracle must fund the new equipment. Utility regulator · April 2026
- WatchAir permit challengeClean Wisconsin and an engineering review challenged the generator permit, which was issued anyway. News report · April 2026
Lawsuits
3 cases on record
- Filed Jan. 2, 2026 Great Lakes Neighbors United v. City of Port Washington and Joint Review BoardWisconsin state court News report · Jan. 2026challenges the tax district as an unnecessary subsidy
- Filed Jan. 29, 2026; injunction denied Feb. 23 MMAC et al. v. City of Port WashingtonWisconsin state court News report · Feb. 2026business groups challenge the voter-approval ordinance; the vote went ahead
- Reported Feb. 19, 2026 Resident open-meetings suitWisconsin state court News report · Feb. 2026asks a judge to review closed meetings and void the development agreement
Money
Money on record
$14.75B
bank loan tranche for this campus
part of a $38B package for Vantage's two Stargate campuses (press, Oct. 2025) News report · Oct. 2025
$1.1B
transmission equipment Oracle pays for
enhanced STATCOM at the planned Decker substation; total line cost $2.5B to $2.7B Utility regulator · Oct. 2026
$455M
city tax rebate over up to 20 years
pays Vantage back $175M plus a $91M substation at 7% interest; the city says it owes nothing if the tax revenue falls short News report · Nov. 2025
Timeline
What happened, and what is due
SitePaper trailConstructionPowerPermitsMoneyLegalUpcoming
- Jan. 31, 2025Site Cloverleaf Infrastructure first announces the Port Washington site; no operator is named News report · Jan. 2025
- Aug. 19, 2025Permits City council unanimously approves the development agreement with Vantage News report · Aug. 2025
- Sept. 2025Power Transmission company files its application for new 345 kV lines News report · Sept. 2025
- Oct. 22, 2025Site OpenAI, Oracle and Vantage announce Stargate Wisconsin Company · Oct. 2025
- Nov. 4, 2025Money Council creates the tax district; the Joint Review Board approves it Nov. 18 News report · Nov. 2025
- Dec. 17, 2025Construction Groundbreaking with four general contractors News report · Dec. 2025
- Jan. 2, 2026Legal Great Lakes Neighbors United sues the city over the tax district News report · Jan. 2026
- April 7, 2026Legal Voters approve a measure requiring votes on future large tax districts; it does not affect this one News report · April 2026
- June 12, 2026Permits DNR issues air permits for the backup generators State agency · June 2026
- Aug. 6, 2026Power State regulators revoke completeness of the transmission application Utility regulator · Aug. 2026
- Sept. 2026Power Revised transmission application filed in a new docket Company · Sept. 2026
- Oct. 15, 2026Construction Second of four buildings topped out News report · Oct. 2026
- July 2027Power Oracle's guidance for first capacity delivery, second half of 2027 (press) News report · Oct. 2026
Construction activity
Building activity by quarter
Since April 2011: 2 FAA filings (Jan. 2026 to Aug. 2026): tallest crane 260 ft (Aug. 2026); 3 OSHA inspections; and 70 satellite captures. The chart starts in the first quarter of 2021; 4 earlier records are not drawn.
FAA filings
OSHA visits
Satellite
’21
’22
’23
’24
’25
’26
Dot size: records in the quarter, largest = 6. Two-digit years mark each first quarter.
The buildings
Specs
Under 22,000 gallons a day
peak water use from city supply; closed-loop cooling; the city agreement sets no cap
Who is involved
Owners, partners and builders
Owners and developers
- Vantage Data Centers: developer, owner and operator (owned by DigitalBridge and Silver Lake)
- Cloverleaf Infrastructure: assembled the site, then handed it to Vantage
Customers
- Oracle: end user, paying for new transmission equipment
- OpenAI: takes the capacity through its Oracle agreement
Power
- We Energies (WEC Energy Group): serving utility
- American Transmission Company: builder of the new lines
- NextEra: owner of Point Beach nuclear plant
- Invenergy: building wind, solar and storage for We Energies
Decision-makers
- Public Service Commission of Wisconsin: transmission and tariffs
- City of Port Washington: land use and tax district
- Wisconsin DNR: environmental and air permits
Builders and lenders
- Whiting-Turner, Weitz, Michels and a Turner and McCarthy venture: phase 1 contractors
- JPMorgan and MUFG: leads on the reported loan
Builders on site
- The Weitz Company LLC: contractor on site per OSHA inspection 349144295; 1 OSHA inspection
- The Whiting-turner Contracting Company: contractor on site per OSHA inspection 349144303
- Turner Mccarthy Joint Venture: contractor on site per OSHA inspection 349149849
- Whiting-Turner Contracting Company: phase 1 general contractor
- Turner Construction / McCarthy Building Companies: phase 1 general contractor (joint venture)
- The Whiting-turner Contracting Company - Osha Monitoring inspection at 1234 Lake: 1 OSHA inspection
Still unknown
Open questions
- A public electric service agreement and in-service date.
- Outcome of the revised transmission application.
- Court rulings on the tax district and open-meetings suits.
- Phase timing for buildings 3 and 4.
Where this comes from
461 records from 68 documents
Drawn from news reports, state agency records, company statements, public and commercial datasets, utility regulator dockets, securities filings, our own analysis and satellite captures, each kept with its date and source. The bar shows documents by type.
News report 36State agency 8Company 8Dataset 8Utility regulator 6SEC filing 6Analysis 1Satellite 0
Evidence
Every quote behind this page
Grade key: A = the primary record itself (permit, filing, exhibit) · B = a dated official statement · C = news reporting. Map distances are our own measurements on OpenStreetMap and carry no grade. Allegations in lawsuits are marked as such in the quotes.
Power (65)
- Substation: Decker Substation (proposed, Port Washington, Ozaukee Co.); two new double-circuit 345 kV lines“Two New Double-Circuit 345 kV Transmission Lines to Interconnect the Proposed Decker Substation Located in Port Washington”Utility regulator · Oct. 2026 · grade A
- Substation kV: 345 kV“Two New Double-Circuit 345 kV Transmission Lines to Interconnect the Proposed Decker Substation Located in Port Washington”Utility regulator · Oct. 2026 · grade A
- Interconnection status: Original CPCN 137-CE-221 completeness revoked by Final Order Sep 10, 2026; revised CPCN filed Sep 2026 as 137-CE-229 (pending, EIS required). Trigger: We Energies load interconnection request LIRF“The applicant submitted the application to the Commission in September 2026.”Utility regulator · Oct. 2026 · grade A
- SEC filings: No filing by Vantage, Oracle or any sponsor vehicle states the campus's 902 MW IT figure; the campus appears in SEC filings only through WEC Energy Group (utility parent) investor presentations filed as 8-K“Vantage Data Centers, a global data center developer and operator, plans to develop a large data center campus in Port Washington”SEC filing · Oct. 2026 · grade A
- Power plan: grid“the American Transmission Company's proposed Ozaukee County Distribution Interconnection Project, which involves the transmission of electricity to the data center campus”State agency · Oct. 2026 · grade A
- Transmission CPCN: caption (applicant and scope of record)“Application of American Transmission Company LLC, as an Electric Public Utility, for a Certificate of Public Convenience and Necessity to construct and operate the Ozaukee Co. Distribution Interconnection Project”Utility regulator · Oct. 2026 · grade A
- Transmission CPCN: caption (revised application, new docket)“Consisting of Two New Double-Circuit 345 kV Transmission Lines to Interconnect the Proposed Decker Substation Located in Port Washington, Ozaukee Co.”Utility regulator · Oct. 2026 · grade A
- Power step: applied“Review in Progress”State agency · Sept. 2026 · grade A
- Transmission/distribution interconnection CPCN application: Review in Progress“Ozaukee Co. Distribution Interconnection Project (Current Application)”State agency · Sept. 2026 · grade A
- Transmission CPCN: Final Order: completeness determination revoked (docket closed; ATC may refile in a new docket)“On September 10, 2026, the Public Service Commission of Wisconsin revoked the completeness determination of American Transmission Company's (ATC) application”Utility regulator · Sept. 2026 · grade A
- WEC Energy Group investor update (8-K Ex. 99.1, filed Sept. 4, 2026): 1.3 GW of demand forecast through 2030 for the Vantage Port Washington campus (OpenAI/Oracle Stargate); four buildings under construction on 670 acres; s“1.3 GW of Demand Forecasted through 2030 Vantage Data Centers is developing a large campus that will be part of OpenAI and Oracle”SEC filing · Sept. 2026 · grade A
- WEC (8-K Ex. 99.1): Oracle has met the financial security requirements for service, in line with the Wisconsin PSC (Very Large Customer tariff) requirements.“Oracle has met the financial security requirements which are in line with the PSCW requirements.”SEC filing · Sept. 2026 · grade A
- On-site generation: 87 MW“The air pollution emission sources identified in the applications include 45 diesel-fired emergency generators capable of a combined power output of 87 megawatts.”State agency · June 2026 · grade A
- Backup generator fleet: 45 diesel-fired emergency generators“On June 12, 2026, the DNR issued a minor source air pollution control construction permit (25-MIN-094) and initial operation permit (24618528A-F01) for 45 diesel-fired emergency generators.”State agency · June 2026 · grade A
- On-site generation: not stated“the DNR issued a minor source air pollution control construction permit (25-MIN-094) and initial operation permit (24618528A-F01) for 45 diesel-fired emergency generators”State agency · June 2026 · grade A
- Backup generators: 45 generators“issued a minor source air pollution control construction permit (25-MIN-094) and initial operation permit (24618528A-F01) for 45 diesel-fired emergency generators”State agency · June 2026 · grade A
- On-site power technology: Diesel emergency generators (backup only)“construction permit (25-MIN-094) and initial operation permit (24618528A-F01) for 45 diesel-fired emergency generators”State agency · June 2026 · grade A
- Transmission/distribution interconnection CPCN application: Final Order Issued (closed)“Ozaukee Co. Distribution Interconnection Project (Initial Application)”State agency · Sept. 2025 · grade A
- Load interconnection request: LIRF #41052-2 (We Energies to ATC)“WE Energies sent the applicant a new load interconnection request form (LIRF) #41052-2, in which WE Energies stated that their current distribution system was not capable of supporting the new load addition”Utility regulator · Oct. 2026 · grade B
- Transmission capital cost stated: 2480770000-2724689000 (137-CE-229, by route); of which 1099366000 E-STATCOM paid in full by Oracle America Cloud Services LLC USD“Of that cost, $1,099,366,000 is attributable to the E-STATCOM, which will be fully paid for by Oracle America Cloud Services, LLC (OACS).”Utility regulator · Oct. 2026 · grade B
- County code: 55089“campus polygon centroid (43.424501,-87.859748): Ozaukee County WI (55089) per FCC point-in-county lookup; the substation area north and west of I-43 also checks in Ozaukee County (55089)”Dataset · Oct. 2026 · grade B
- Nearest power line of 345 kV or more: 5.74 kmMeasured on OpenStreetMap map data.
- Nearest substation of 345 kV or more: 9.91 kmMeasured on OpenStreetMap map data.
- Air facility ID: FID 246185280 (Vantage WI-1)“Permit Tracking Air Management Program Facility Information for 246185280 Vantage WI-1 Location Address N43430735 W 87861494 Port Washington WI 53074”State agency · Oct. 2026 · grade B
- Square feet: 2500000 sq ft“four single-story data centers totaling 902MW across 2.5 million square feet”Company · Oct. 2026 · grade B
- IT capacity: 902 MW“672, acre campus, 4, data centers, 902MW of critical IT load”Company · Oct. 2026 · grade B
- Interconnection status: No CPCN issued. ATC docket 137-CE-221 was closed Aug. 6, 2026 after the PSC revoked its completeness determination; ATC filed a revised application in Sept 2026 under new docket 137-CE-229. Transmis“the Commission unanimously revoked the completeness determination and deemed the application incomplete due to substantial changes to the project application. This action terminates the statutory deadline”Utility regulator · Oct. 2026 · grade B
- PSC filing to follow“We Energies and Oracle announced an agreement that is expected to save customers approximately $300 million in fuel costs”Company · Oct. 2026 · grade B
- Substation: Decker Substation (proposed, Port Washington), campus connection point in ATC project; up to five new substations proposed overall“Build two new dual-circuit 345-kV power lines connecting the proposed Decker Substation in Port Washington to the existing electric system”Company · Sept. 2026 · grade B
- Transmission CPCN: revised application filed in new docket“Filed a revised application with the Public Service Commission of Wisconsin in September 2026”Company · Sept. 2026 · grade B
- Transmission CPCN: completeness REVOKED; application deemed incomplete; docket closed (explicitly not a denial)“At the August 6, 2026, open meeting, the Commission unanimously revoked the completeness determination and deemed the application incomplete due to substantial changes to the project application”Utility regulator · Aug. 2026 · grade B
- Transmission CPCN: Final EIS issued“PSC Final Environmental Impact Statement (July 2026)”Utility regulator · July 2026 · grade B
- Transmission CPCN: ALJ directives on deficient/changing application“the PSC's Administrative Law Judge, who is granted the authority to regulate the course of the proceeding, raised serious concerns about the missing and changing information and issued directives requesting specific remedies”Utility regulator · July 2026 · grade B
- Grid upgrade due to be energized by: Dec. 10, 2027“far beyond ATC's timeline to serve its customer by the requested December 10 2027 inservice date”State agency · June 2026 · grade B
- transmission upgrade (MTEP App A/B): Substations reassigned to ATC after MISO variance analysis“the Selection Report described a June 2033 inservice date for all Project WISE facilities - including the Ozaukee County Transmission Project Substations”State agency · June 2026 · grade B
- Rate class: Very Large Customer (VLC) and Bespoke Resources tariffs, PSC docket 6630-TE-113 (approved with modifications April 24, 2026)“We Energies' Very Large Customer (VLC) and Bespoke Resources Tariff application”Utility regulator · April 2026 · grade B
- Conditions of approval: PSC VLC tariff conditions (docket 6630-TE-113): 15-year minimum initial term; 100 MW eligibility threshold; VLCs fund 100% of bespoke resource costs; transmission cost-shift protections; added rep“The Commission extended the VLC tariff minimum initial term length to 15 years”Utility regulator · April 2026 · grade B
- Utility service: 1,300 MW“1.3 GW of Demand Forecasted through 2030”SEC filing · March 2026 · grade B
- Stated campus size: 3,500 MW“Site potential up to 3.5 GW over time”SEC filing · March 2026 · grade B
- Utility service: 1,300 MW“1.3 GW of Demand Forecasted through 2030”SEC filing · March 2026 · grade B
- Transmission CPCN: completeness determination issued (statutory clock started)“On December 15, 2025, the Commission deemed ATC's application complete, pursuant to Wis. Stat. § 196.491(3)(a)2”Utility regulator · Dec. 2025 · grade B
- Transmission capital cost stated: 1390259000-1673343000 (137-CE-221 original application, by route) USD“the estimated project cost would be between $1,390,259,000 and $1,673,343,000 depending on the chosen Route”Utility regulator · Nov. 2025 · grade B
- IT capacity: 1,000 MW“four cutting-edge data centers providing close to a gigawatt of AI capacity”Company · Oct. 2025 · grade B
- Utility: We Energies (Wisconsin Electric Power Co.)“a dedicated electricity rate from WEC Energy Group utility We Energies”Company · Oct. 2025 · grade B
- WEC Energy Group: the Vantage partnership adds nearly 2 GW of new energy resources to the grid; 70% allocated to Lighthouse, 30% to all other customers. Utility-side generation context, never booked as campus MW“Together with Vantage, we are adding nearly two gigawatts of new energy to the grid, 30% of which will be dedicated to the homes, farms and other businesses we serve today”Company · Oct. 2025 · grade B
- On-site generation: 87 MW“45 diesel-fired emergency generators with combined output of 87 MW per DNR environmental analysis page”grade B
- Stated campus size: 1,000 MW“Cloverleaf Infrastructure announced plans to develop a large data center campus in Port Washington: Initial announcement expects 1 GW of load”SEC filing · Feb. 2025 · grade B
- Nearest gas pipeline: none mapped within 16 kmMeasured on OpenStreetMap map data.
- Stage: Building on track (structures ahead of power); power delivery at risk, the CPCN restart makes full 1,300 MW unlikely before late 2028 against Oracle's 2H 2027 delivery guidance“Based on regulatory filings reviewed through September 24, 2026, Aterio sees a material risk the site misses Oracle's second-half 2027 delivery guidance”News report · Oct. 2026 · grade C
- We Energies begins construction on three Invenergy-built projects (150 MW solar + 50 MWh BESS in Rock Co.; 110 MW wind in Iowa/Grant Cos.; 75 MW BESS in Walworth Co.); ~50% of each project's capacity allocated to the Por“Approximately 50 percent of the generated capacity of each of the projects has been allocated to the under-development $15 billion Port Washington campus”News report · Oct. 2026 · grade C
- large load interconnection request: agreement announced; PSC approval required (not yet filed)“Oracle has committed to buying 125-250 MWe from NextEra's Point Beach NPP in Wisconsin.”News report · Oct. 2026 · grade C
- Utility service: 438 MW“That request also projected 438 MW of peak demand during 2027, followed by 1.3 GW from 2028 onward across the campus”News report · Oct. 2026 · grade C
- large load interconnection request: completeness determination revoked; case closed (ATC to refile)“On August 7, Wisconsin's Public Service Commission did something it had never done in its 95-year history: it voted unanimously to revoke a completeness determination it had already granted.”News report · Oct. 2026 · grade C
- Oracle and We Energies announced Oct 2, 2026 that Oracle will subscribe to 10-20% of Point Beach Nuclear Plant output (125-250 MW) for the Lighthouse Campus; the deal still needs PSC approval“Oracle has agreed to subscribe to 10-20% of the output from the Point Beach Nuclear Plant”News report · Oct. 2026 · grade C
- Grid operator: MISO“Next Key Milestone: PSC completeness determination (expected October 19, 2026) & MISO voltage-stabilization device filing”News report · Oct. 2026 · grade C
- Interconnection status: Blocked at transmission approval - the campus cannot operate until ATC's refiled CPCN is approved and the high-voltage line is built; Aterio base case puts full 1.3 GW around Oct 2028 against Orac“The campus can't operate until American Transmission Company (ATC) builds a new high-voltage interconnection, and that work can't begin without approval from the Public Service Commission of Wisconsin (PSC).”News report · Sept. 2026 · grade C
- Utility service: 1,300 MW“The campus is rated at 902 MW of computing load and 1.3 GW of total electricity demand”News report · Sept. 2026 · grade C
- large load interconnection request: application refiled; statutory review restarted under a new docket“ATC refiled in September, resetting the statutory clock under a new docket.”News report · Sept. 2026 · grade C
- Aterio publishes delay-risk analysis: material risk the site misses Oracle's 2H 2027 delivery guidance; base case partial power Dec 2027 / full 1.3 GW Oct 2028; extended case full power Apr 2029“Aterio sees a material risk the site misses Oracle's second-half 2027 delivery guidance, with meaningful load unlikely before mid-2028”News report · Sept. 2026 · grade C
- Stated campus size: 1,300 MW“the first phase of construction in Port Washington for Vantage, which will be used by OpenAI and Oracle, is 672 acres, needs 1.3 gigawatts”News report · March 2026 · grade C
- IT capacity: 902 MW“The multi-phase development will include four buildings totaling approximately 2.5 million square feet and is designed to deliver up to 902 megawatts of capacity”News report · Dec. 2025 · grade C
- Entitlement status: parcels annexed from the Town of Port Washington into the city I-3 Technology Campus District (TID No. 5); Plan Commission approved the building/site operations plan amendment on Nov 20, 2025, includi“Commission approves annexation and rezoning for data center parcels, recommends discontinuance of Highland Drive segment”News report · Nov. 2025 · grade C
- Stated campus size: 3,500 MW“Last month, Vantage applied for a 1.3GW grid connection for the project, though at full buildout the campus could expand to 3.5GW according to local utility, We Energies”News report · Oct. 2025 · grade C
- Transmission CPCN: application filed by ATC“American Transmission Company (ATC) first asked the Public Service Commission of Wisconsin (PSC) to approve that project in September 2025”News report · Sept. 2025 · grade C
- Project first publicly announced as a Cloverleaf Infrastructure powered-land data center site in Port Washington; operator and end users not yet named“Neitzke, who was first elected in 2021 and reelected in 2024, has been a champion of the project since it was announced in January of 2025”News report · Jan. 2025 · grade C
Money and contracts (38)
- customer-funded transmission (CPCN cost allocation): cost allocation 1099366000 USD“No costs related to the E-STATCOM will be paid by any other customers of ATC or Wisconsin Electric.”Utility regulator · Oct. 2026 · grade B
- Electric service agreement: missing document FINDING: no campus-specific electric service agreement or individual contract rate has been filed or made public for Lighthouse; service is structured under the VLC/Bespoke ta“In March 2025, We Energies submitted an application proposing the new tariffs in response to large data center customers entering the utility's service territory”Utility regulator · Oct. 2026 · grade B
- Point Beach nuclear subscription agreement: scope Oracle voluntarily subscribes to a portion of the Point Beach Nuclear Plant energy We Energies is required to purchase; expected to save other customers ~$300M in fuel co“Oracle will voluntarily subscribe to a portion of increasingly expensive energy that We Energies is required to purchase from the Point Beach Nuclear Plant”Company · Oct. 2026 · grade B
- Point Beach nuclear subscription agreement: condition precedent Subject to PSC of Wisconsin approval; full details to be submitted to the PSC in the coming months, not yet filed at announcement“Full details will be submitted to the Public Service Commission of Wisconsin in the coming months as part of its review of the agreement”Company · Oct. 2026 · grade B
- Very Large Customer + Bespoke Resources tariffs (PSC 6630-TE-113): term Minimum initial term extended by the PSC to 15 years“The Commission extended the VLC tariff minimum initial term length to 15 years”Utility regulator · April 2026 · grade B
- Very Large Customer + Bespoke Resources tariffs (PSC 6630-TE-113): eligibility threshold Tariff eligibility threshold lowered from 500 MW to 100 MW“The Commission lowered the energy demand threshold for tariff eligibility from 500 MW to 100 MW”Utility regulator · April 2026 · grade B
- Very Large Customer + Bespoke Resources tariffs (PSC 6630-TE-113): cost allocation Capacity-only option (pay 75% of generation facility costs) removed; under the approved Full-Benefits resource model VLCs pay 100% of the“The removal of this capacity-only option and the approval of the Full-Benefits resource model protects existing customers by requiring the VLCs to pay 100% of their costs”Utility regulator · April 2026 · grade B
- Very Large Customer + Bespoke Resources tariffs (PSC 6630-TE-113): transmission cost allocation PSC required tariff revisions addressing transmission cost-shifting risk, plus additional reporting on the tariffs and on ut“The Commission required tariff revisions to address the risk of transmission cost shifting from data center customers to existing customers”Utility regulator · April 2026 · grade B
- Buildings planned: 4 buildings“Four data center buildings planned on 670 acres with expected investment of $15+ billion in Port Washington”SEC filing · Dec. 2025 · grade B
- Investment: 15 USD billions“Four data center buildings planned on 670 acres with expected investment of $15+ billion in Port Washington”SEC filing · Dec. 2025 · grade B
- Tenant program: Stargate (OpenAI / Oracle partnership)“Vantage Data Centers plans to develop a large campus that will be part of OpenAI and Oracle’s partnership for the Stargate expansion”SEC filing · Dec. 2025 · grade B
- tenant lease: capacity not named MW (not stated in source)“Vantage Data Centers plans to develop a large campus that will be part of OpenAI and Oracle's partnership for the Stargate expansion”SEC filing · Dec. 2025 · grade B
- Serving utility's parent states in an SEC-filed investor deck that the Vantage Port Washington campus will be part of OpenAI and Oracle's Stargate expansion partnership - the first filing-grade tenant attribution for the“Vantage Data Centers plans to develop a large campus that will be part of OpenAI and Oracle’s partnership for the Stargate expansion”SEC filing · Dec. 2025 · grade B
- Water restoration pledge: commitment $3M pledge to restore the Valley Creek Corridor and advance water positivity; corridor restoration expected complete late 2028 USD“Vantage Data Centers Pledges $3M to Lakeshore Natural Resource Partnership to Restore Valley Creek Corridor”Company · Nov. 2025 · grade B
- Stated capital cost: 15000000000 USD“Vantage Data Centers' $15B+ campus in Port Washington, Wisconsin represents the future of sustainable digital infrastructure”Company · Oct. 2025 · grade B
- Tenants: Oracle (end user / operator of the capacity); OpenAI (takes capacity through its agreement with Oracle)“today announced plans to develop a data center campus outside Milwaukee in Port Washington, Wisconsin”Company · Oct. 2025 · grade B
- Tenant status: Announced end users under the July 2025 OpenAI-Oracle agreement to develop up to 4.5 GW of additional Stargate capacity; no campus-specific lease, ESA or capacity contract is public“The Midwest site mentioned in this blog post will be located in Wisconsin and be developed by Oracle in partnership with Vantage”Company · Oct. 2025 · grade B
- Stargate capacity agreement: scope Up to 4.5 GW of additional Stargate capacity; partnership exceeds $300B over five years; Lighthouse (Port Washington) is one of three Oracle-developed sites under it USD“In July, OpenAI and Oracle entered an agreement to develop up to 4.5 gigawatts of additional Stargate capacity”Company · Oct. 2025 · grade B
- Campus acres: 670 acres“Initial 2.5 million square feet of data center buildings planned on 670 acres with expected investment of at least $8 billion”SEC filing · Sept. 2025 · grade B
- Development agreement: missing clauses termination FINDING: termination, cancellation and default clauses of the development agreement are not public, the full agreement text was not posted by the city and only summarie“the city's council has already unanimously approved a development agreement with the campus' operator, Denver-based Vantage”News report · Oct. 2026 · grade C
- Point Beach nuclear subscription agreement: scope size Subscription reported at 10-20% of Point Beach output (the plant is ~1,200 MW, so ~125-250 MW); the companies' own releases state no percentage or MW figure %“We Energies has agreed to let Oracle subscribe to 10% to 20% of electricity from the Point Beach nuclear plant for its planned data center campus”News report · Oct. 2026 · grade C
- Voters approve the ordinance requiring voter approval for future TIDs over $10M: 2,710 yes (66%) to 1,371 no, ~51% turnout. First such measure in the US per proponents; does not affect TID No. 5“A total of 2,710 voted yes, and 1,371 people voted no”News report · April 2026 · grade C
- Land price: 9300000 USD“Vantage Data Centers paid $9.3 million for just over 121 acres of land in Port Washington, according to state property records”News report · Jan. 2026 · grade C
- Development agreement: missing clause water cap FINDING: the finalized development agreement sets NO numeric cap on water usage; the <22,000 gal/day figure appears only in Vantage presentations and FAQ documents“in the finalized development agreement between Vantage and Port Washington, no numeric caps for water usage are set”News report · Dec. 2025 · grade C
- compute services (end customer): capacity 902 MW critical IT“delivering up to 902 megawatts of critical IT load across 2.5 million square feet, with full completion targeted for 2028”News report · Dec. 2025 · grade C
- General contractor: Whiting-Turner Contracting Company; The Weitz Company; Michels Corporation; Turner Construction / McCarthy Building Companies JV (phase 1)“Construction of the $8 billion first phase will be undertaken by Whiting-Turner Contracting Company, The Weitz Company, Michels Corporation, and a joint venture between Turner Construction and McCarthy Building Companies”News report · Dec. 2025 · grade C
- Site acres: 672 acres“Construction is officially underway on a massive $15 billion data center campus in Port Washington”News report · Dec. 2025 · grade C
- Labor agreement: scope Lighthouse to be built with union labor; >4,000 construction jobs, majority union“In October, Vantage announced a labor agreement with the Wisconsin Building Trades Council to ensure the Lighthouse data center campus is built using union labor”News report · Dec. 2025 · grade C
- Incentives: TID No. 5 (industrial, pay-as-you-go): reimburses Vantage's $175M infrastructure outlay plus a ~$91M substation, consulting fees and town annexation payments, with 7% interest (~$187M); total estimated ~$455-“The TIF district was approved by the Port Washington Common Council on Nov. 4, 2025, and by the city's Joint Review Board on Nov. 18”News report · Nov. 2025 · grade C
- Tax Incremental District No. 5: creation Industrial TID No. 5 created by Common Council Nov. 4, 2025; approved by Joint Review Board Nov. 18, 2025“The TIF district was approved by the Port Washington Common Council on Nov. 4, 2025, and by the city's Joint Review Board on Nov. 18”News report · Nov. 2025 · grade C
- Development agreement: city obligation limit If they fail, the project stops, we are not obligated to pay that debt back (Mayor Ted Neitzke on the pay-as-you-go structure)“Vantage is putting all the capital up front for all of the infrastructure. We pay them back. If they fail, project stops — we are not obligated to pay that debt back”News report · Nov. 2025 · grade C
- Tax Incremental District No. 5: term Remains open up to 20 years or until Vantage's infrastructure costs are reimbursed, whichever comes first years“The TID would remain active for up to 20 years, or until the company's infrastructure costs are reimbursed, whichever happens first”News report · Nov. 2025 · grade C
- Financing: $14.75B senior secured credit facility for the Wisconsin campus within a $38B JPMorgan/MUFG-led debt package covering Vantage's two Stargate campuses (Texas tranche $23.25B)“the campuses are being developed by Vantage Data Centers, which will be used by Oracle under its deal to supply capacity to OpenAI”News report · Oct. 2025 · grade C
- Bloomberg reports a $38B JPMorgan/MUFG-led debt package for Vantage's two Oracle-linked Stargate campuses; $23.25B Texas tranche, $14.75B Wisconsin tranche; preliminary pricing ~2.5 points over benchmark“For the campus in Shackelford County, Texas, several banks have already committed to a $23 billion loan, part of the wider debt package”News report · Oct. 2025 · grade C
- Development agreement: reimbursement terms Reimbursement from TID No. 5 tax increments, principal plus 7% interest (interest estimated ~$187M); pay-as-you-go; the city issues no debt“Vantage would be reimbursed principal plus interest at an agreed rate (7% was cited in the presentation) for public infrastructure and substation costs”News report · Oct. 2025 · grade C
- Tax Incremental District No. 5: total obligations ~$455.4M estimated total reimbursements including ~$187M interest component (project plan estimate); press rounds to $458M USD“the consultant's illustrative project plan lists roughly $455,400,000 in reimbursements and related costs (estimate) including an interest component of about $187,000,000”News report · Oct. 2025 · grade C
- tenant lease: contract value 14750000000 USD construction loan facility (Wisconsin)“the debt funding will be split into two packages: one $23.25bn offer, and another $14.75bn offering, to be used for the Texas and Wisconsin data center projects, respectively”News report · Oct. 2025 · grade C
- Development agreement: scope Vantage fronts $175M of infrastructure improvements (new water tower, water and sewer upgrades, roads, power infrastructure) USD“reimburse Vantage in property taxes for fronting $175 million in infrastructure improvements, including building a new water tower and repairs to the city's water and sewer utilities”News report · Aug. 2025 · grade C
Permits and government (34)
- Water main construction authorization: application filed“Authority to Construct 4.2 Miles of 16-inch Water Main to Serve the Vantage Data Center Site”Utility regulator · Oct. 2026 · grade A
- Air pollution control construction permit (minor source): Issued - Active“25-MIN-094 Construction 09/02/2025 11/18/2025 03/13/2026 06/12/2026 Active”State agency · Oct. 2026 · grade A
- Air pollution control operation permit (FESOP): Issued - Active“24618528A-F01 FESOP 08/29/2025 09/18/2025 03/13/2026 06/12/2026 Active”State agency · Oct. 2026 · grade A
- Construction stormwater general permit coverage: Coverage conveyed“On Dec. 11, 2025, the DNR conveyed stormwater permit coverage for construction activities in project areas 1 & 2 (including laydown area 4) and construction laydown areas 1, 2, and 3.”State agency · Oct. 2026 · grade A
- Nonfederal wetland exemption determinations: Granted“On Dec. 11, 2025, the DNR granted nonfederal wetland exemption determinations for wetlands located in project areas 1 & 2 and construction laydown area 3.”State agency · Oct. 2026 · grade A
- Environmental analysis (WEPA) determination: Issued“On Dec. 11, 2025, the DNR issued a WEPA Compliance Determination.”State agency · Oct. 2026 · grade A
- Air, construction + operation permits: ISSUED (final)“On June 12, 2026, the DNR issued a minor source air pollution control construction permit (25-MIN-094) and initial operation permit (24618528A-F01) for 45 diesel-fired emergency generators”State agency · June 2026 · grade A
- Air, construction + operation permits: draft permits noticed; public comment period and hearing“Between March 3 and April 14, 2026, the DNR held a public comment period on the draft air permits. This included a public hearing held on April 14, 2026”State agency · April 2026 · grade A
- Wisconsin DNR: Public hearing on draft air permits 25-MIN-094 / 24618528A-F01“This included a public hearing held on April 14, 2026”State agency · April 2026 · grade A
- Wetlands, nonfederal exemption determinations: granted“On Dec. 11, 2025, the DNR granted nonfederal wetland exemption determinations for wetlands located in project areas 1 & 2 and construction laydown area 3”State agency · Dec. 2025 · grade A
- Stormwater, construction general permit coverage: coverage conveyed“On Dec. 11, 2025, the DNR conveyed stormwater permit coverage for construction activities in project areas 1 & 2 (including laydown area 4)”State agency · Dec. 2025 · grade A
- Environmental analysis (WEPA): WEPA compliance determination issued“On Dec. 11, 2025, the DNR issued a WEPA Compliance Determination”State agency · Dec. 2025 · grade A
- Environmental analysis (WEPA): EA summary released“On Dec. 9, 2025, the DNR released an Environmental Analysis Summary on Vantage's Lighthouse project”State agency · Dec. 2025 · grade A
- Municipal water + sewer plan approvals: plans and specifications submitted“On Sept. 25, 2025, plans & specifications for the construction of a water supply main to service the proposed data center campus”State agency · Sept. 2025 · grade A
- Sewer service area amendment: amendment request submitted“the Southeastern Wisconsin Regional Planning Commission (SEWRPC) submitted a request for administrative approval of an amendment to extend the Port Washington Sewer Service Area to include the proposed data center campus”State agency · Sept. 2025 · grade A
- FAA crane on site: FAA case 2026-AGL-1447-OE 'Vantage 100T Crane 1' (180-ft mobile crane) at 43.43167,-87.85354, submitted Jan. 29, 2026; a second large crawler crane case (2026-AGL-13339-OE 'MLC300', 260 ft) sits inside th“2026-AGL-1447-OE Vantage 100T Crane 1 Mobile Crane 180 ft AGL 43.43167222,-87.85353889 submitted 01/29/2026”FAA · Oct. 2026 · grade B
- Aliases: Project Lighthouse; Stargate Wisconsin; Vantage WI-1 (WI DNR permit site name)“Vantage WI-1 (Stargate Wisconsin / Lighthouse)”grade B
- FAA obstruction evaluation (7460-1): Determined - No Hazard“ASN 2026-AGL-13339-OE: MLC300, Mobile Crane, 260 ft AGL, 995 ft AMSL, 43.42778,-87.86278, Determined - No Hazard, submitted 2026-08-25”FAA · Aug. 2026 · grade B
- Public Service Commission of Wisconsin: Open meeting: revocation of completeness determination, docket 137-CE-221“At the August 6, 2026, open meeting, the Commission unanimously revoked the completeness determination and deemed the application incomplete”Utility regulator · Aug. 2026 · grade B
- Permitting authority: Land use: City of Port Washington (site annexed from the Town of Port Washington in 2025; town approval not required after annexation). Utility rates and transmission CPCN: PSC of Wisconsin, which s“The Commission does not regulate the permitting, construction, or operations of data center facilities”Utility regulator · April 2026 · grade B
- Public Service Commission of Wisconsin: Open meeting: decision on We Energies VLC and Bespoke Resources tariffs, docket 6630-TE-113“The Commission discussed this case during its April 24, 2026 open meeting”Utility regulator · April 2026 · grade B
- Public Service Commission of Wisconsin: Prehearing conference, docket 137-CE-221 (ATC Ozaukee Interconnection CPCN)“A prehearing conference was held on March 20, 2026 and the docket schedule was set”Utility regulator · March 2026 · grade B
- FAA obstruction evaluation (7460-1): Determined - No Hazard“ASN 2026-AGL-1447-OE: Vantage 100T Crane 1, Mobile Crane, 180 ft AGL, 909 ft AMSL, 43.43167,-87.85354, Determined - No Hazard, submitted 2026-01-29”FAA · Jan. 2026 · grade B
- FAA OE/AAA crane filings evidence vertical construction at the Vantage Lighthouse campus: a 180-ft crane filed as 'Vantage 100T Crane 1' inside the campus outline (submitted Jan. 29, 2026) and a 260-ft MLC300 mobile crane i“ASN 2026-AGL-1447-OE: Vantage 100T Crane 1, Mobile Crane, 180 ft AGL, 909 ft AMSL, 43.43167,-87.85354, Determined - No Hazard, submitted 2026-01-29”FAA · Jan. 2026 · grade B
- Air, minor source construction permit + initial operation permit: applications submitted“On Aug. 29, 2025, Vantage submitted applications for a minor source construction permit and an initial operation permit for the proposed data center”grade B
- Vantage Data Centers postings for Port Washington, WI construction roles (Director Construction; Community Engagement Specialist, on-site Port Washington; construction project“This is a full-time, on-site position based in Port Washington, Wisconsin”Company · Oct. 2026 · grade C
- Air, permit opposition: comments and challenge reported“Midwest Environmental Advocates hired engineering firm Wingra to review the diesel generators' compliance with one-hour national standards for nitrogen oxides”News report · April 2026 · grade C
- Opposition: Great Lakes Neighbors United (resident group formed 2025): TID lawsuit, referendum petition drive, mayoral recall attempt; sustained protest turnout at council meetings from Oct 2025“The referendum won with 66% of voters answering yes on the ballot question”News report · April 2026 · grade C
- Joint Review Board, City of Port Washington: TID No. 5 approval“The TIF district was approved by the Port Washington Common Council on Nov. 4, 2025, and by the city's Joint Review Board on Nov. 18”News report · Nov. 2025 · grade C
- Common Council, City of Port Washington: Creation of Tax Incremental District No. 5“The TIF district was approved by the Port Washington Common Council on Nov. 4, 2025, and by the city's Joint Review Board on Nov. 18”News report · Nov. 2025 · grade C
- Plan Commission, City of Port Washington: Resolution 2025-3: TID No. 5 boundaries and project plan (Ehlers)“The Port Washington Plan Commission on Oct. 16 approved Resolution 2025-3 establishing the boundaries and project plan for Tax Incremental District Number 5”News report · Oct. 2025 · grade C
- Common Council, City of Port Washington: Public meeting/comment on the data center and proposed TID“At a public meeting Oct. 7, Port Washington's $8 billion artificial intelligence data center campus project saw its strongest showing of vehement opposition”News report · Oct. 2025 · grade C
- City of Port Washington (council/plan commission): Campus plan approval for the ~1,900-acre annexed data center area; TID intent shared“In September, Port Washington officials approved the 1,900-acre data center campus and shared plans to establish a tax increment district to reimburse Vantage”News report · Sept. 2025 · grade C
- Common Council, City of Port Washington: Development agreement with Vantage Data Centers Management Company, LLC“the city's council has already unanimously approved a development agreement with the campus' operator, Denver-based Vantage. That came Aug. 19”News report · Aug. 2025 · grade C
Legal (4)
- Lawsuits: (1) Great Lakes Neighbors United v. City of Port Washington & Joint Review Board (filed Jan. 2, 2026) challenging TID No. 5; (2) MMAC et al. v. City of Port Washington (filed Jan. 29, 2026) challenging the referendu“The city now faces three lawsuits tied to the $15 billion data center campus for Vantage, OpenAI and Oracle in Port Washington”News report · Feb. 2026 · grade C
- MMAC and allied business/trade groups sue the city challenging the referendum ordinance as vague and in conflict with state law; Judge Gerol denies their motion to halt the referendum on Feb 23, 2026“On Feb. 23, Ozaukee County Circuit Court Judge Adam Gerol denied the business groups' request to halt the referendum”News report · Feb. 2026 · grade C
- Third suit reported: a resident's open-meetings lawsuit asking a judge to review closed meetings and invalidate the development agreement; also referred to the Ozaukee County DA“The lawsuit asks a judge to review the closed meetings and invalidate the developer's agreement if violations are found”News report · Feb. 2026 · grade C
- Great Lakes Neighbors United sues the City of Port Washington and its Joint Review Board challenging TID No. 5 (alleges conflict with WI TID statutes, unnecessary subsidy)“Their lawsuit against the city alleges the TIF district conflicts with Wisconsin statutes governing TIDs, which require industrial TIDs to support public interests”News report · Jan. 2026 · grade C
Site and other (31)
- Site location agency: 43.430735, -87.861494“Location Address N43430735 W 87861494 Port Washington WI 53074”State agency · Oct. 2026 · grade A
- City: Port Washington, WI“Vantage Data Centers (Vantage) is developing a data center campus in the city of Port Washington in Ozaukee County”State agency · Oct. 2026 · grade A
- County: Ozaukee County, WI“developing a data center campus in the city of Port Washington in Ozaukee County”State agency · Oct. 2026 · grade A
- Acres total owned: 1644 acres“is being constructed on 672 acres of previously agricultural land, approximately 1 mile inland from Lake Michigan. Vantage owns a total of 1,644 acres”State agency · Oct. 2025 · grade A
- Land control date: 2025 (site annexed into the City of Port Washington from the Town of Port Washington; Vantage assembled and owns ~1,644 acres)“Vantage owns a total of 1,644 acres”State agency · Oct. 2025 · grade A
- Project status: under construction - ground broken Dec 17, 2025; second of four buildings topped out Oct 2026“vertical (ground broken Dec 17, 2025; second of four buildings topped out Oct 2026 per Vantage via DCD)”grade B
- Campus area: 672-acre campus within 1,644 acres owned by Vantage, City of Port Washington, Ozaukee County“The Lighthouse campus is being constructed on 672 acres of previously agricultural land, approximately 1 mile inland from Lake Michigan. Vantage owns a total of 1,644 acres.”State agency · Oct. 2026 · grade B
- Name: Vantage Lighthouse (Stargate Wisconsin)“Port Washington (Lighthouse) Data Center Campus”Company · Oct. 2026 · grade B
- Developer: Vantage Data Centers“this landmark AI campus is Vantage's first in the Badger State”Company · Oct. 2026 · grade B
- Code names: Project Lighthouse“the planned commitment builds on Oracle's broader investment in Wisconsin through Project Lighthouse”Company · Oct. 2026 · grade B
- Water use stated: 22000 gallons/day“a redundant point of water supply to Vantage's private water system, with a daily demand of 22,000 gallons per day and target fire flow of 3,500 gallons per minute”Utility regulator · July 2026 · grade B
- Site acres total: 1900 acres“Site potential up to 3.5 GW over time; Approximately 1,900 acres”SEC filing · March 2026 · grade B
- Water use stated: <22,000 gallons/day peak; city water supply; no direct withdrawal from or discharge to Lake Michigan“The campus is expected to use less than 22,000 gallons of water daily, equivalent to approximately 65 residential homes, utilizing the existing city water supply”Company · Nov. 2025 · grade B
- Acres: 672 acres“Vantage is developing 500 of 672 total acres for the four data centers”Company · Oct. 2025 · grade B
- Buildings: 4 buildings“The campus will feature four cutting-edge data centers providing close to a gigawatt of AI capacity”Company · Oct. 2025 · grade B
- Cooling: Closed-loop liquid cooling“The campus will leverage a closed-loop liquid cooling system that uses minimal water and drives significant energy savings”Company · Oct. 2025 · grade B
- Announced: Oct. 22, 2025“OpenAI, Oracle and Vantage Data Centers, a leading global provider of hyperscale data center campuses, today announced plans to develop a data center campus outside Milwaukee in Port Washington, Wisconsin”Company · Oct. 2025 · grade B
- Original target date: 2028“Construction will begin soon and is scheduled for completion in 2028”Company · Oct. 2025 · grade B
- Construction stage: Vertical/enclosed: buildings 1-2 structurally complete (second building topped out week of Oct 12, 2026); fit-out/equipment installation underway in enclosed halls; remaining buildings in earlier stag“The company this week topped out the second data center at its Lighthouse campus in Port Washington, marking the completion of its structural framework”News report · Oct. 2026 · grade C
- Second data center building topped out (Vantage announcement via LinkedIn, reported by DCD); peak construction employment ~5,000“The company this week topped out the second data center at its Lighthouse campus in Port Washington, marking the completion of its structural framework”News report · Oct. 2026 · grade C
- Current target date: 2028“Vantage has said it expects full campus buildout by 2028”News report · Sept. 2026 · grade C
- Workforce estimate: 2,800-3,000 workers on site daily (Sept 2026); ~5,000 at peak construction (Vantage)“2,800-3,000 workers on site daily”News report · Sept. 2026 · grade C
- First block launch guidance: 2028“the Port Washington data center campus is still scheduled to launch in 2028”News report · Sept. 2026 · grade C
- ATC told the Journal Sentinel the Port Washington campus will not be served until the transmission facilities are in service; those facilities are unapproved (137-CE-229 in review) and unbuilt as of Oct 20, 2026“until the transmission facilities are in service”News report · Sept. 2026 · grade C
- Vantor satellite imagery (via Aterio): two of the four halls enclosed; equipment installation underway inside finished sections; work continuous since Dec 2025“satellite imagery shows two of the four halls enclosed”News report · Sept. 2026 · grade C
- Mayoral recall petition (Mayor Ted Neitzke) submitted at the statutory deadline; city clerk's initial review finds it several hundred signatures short of the ~1,600 required, recall fails“the petition is several hundred signatures short of the number required to initiate a recall election”News report · Feb. 2026 · grade C
- Address: Parcels near 4799 County Road LL, Port Washington (northern portion of the site)“The two parcels purchased this month by Vantage Data Centers, located generally at 4799 County Road LL”News report · Jan. 2026 · grade C
- Groundbreaking date: Dec. 17, 2025“Vantage Data Centers has broken ground on the Lighthouse data center project in Port Washington, Wisconsin”News report · Dec. 2025 · grade C
- Groundbreaking ceremony for the Lighthouse campus; four phase-1 GCs named (Whiting-Turner, Weitz, Michels, Turner/McCarthy JV)“Vantage Data Centers has broken ground on the Lighthouse data center project in Port Washington, Wisconsin”News report · Dec. 2025 · grade C
- ATC files CPCN application for the Ozaukee County Distribution Interconnection Project (docket 137-CE-221)“ATC first asked the Public Service Commission of Wisconsin (PSC) to approve that project in September 2025”News report · Sept. 2025 · grade C
- Cloverleaf Infrastructure announces Vantage will operate/develop the facility“Cloverleaf announced June 11 that Vantage would operate the facility”News report · June 2025 · grade C
Imagery and records: Aerial imagery: local aerial photography via Esri World Imagery Wayback.