Data Center Record.

Running Built from one source

Data Holdings Milwaukee Data Center (Stack41)

Milwaukee, Milwaukee County, WIDeveloper: Data Holdings / Stack41Census GEOID 55079

Stage
Running
Power
6 MW
the developer's figure
Buildings
1 building
operator page, verified October 27, 2026
Undisclosed in public filings
Land, Water

Data Holdings and Stack41 operate a Tier III commercial colocation data center at 3135 West Highland Boulevard in Milwaukee, Milwaukee County, Wisconsin. It is running; the record holds no sourced date for when it reached that stage.

How much water it would use and who would use it have not been disclosed.

1 hearing on the record, 2026

Last verified · 1 source, 0 primary · Built from one source, not yet reviewed in depth by a person. · How to read this page

  • This record: Running, ringed
  • data center
  • Smaller pins: 21 other published records in Wisconsin
Details
  • this record's location, ringed
  • parcel outline, from the county parcel record
  • city limits, U.S. Census Bureau, on a town level record
  • county boundary

The other pins are the published projects in the same state, each in its stage color. The imagery beneath is the USGS national orthoimagery, public domain, shown so the land around the site can be read.

How to read this page. Every fact links to the source it rests on; a number in brackets is its place in the source list. A figure no source gives reads Not disclosed, and nothing is estimated. Where sources give different figures, each is shown with who gave it, and another source's figure never stands in for the record's own. Entries are added and never overwritten; corrections are listed under What happened.

What is known

Each figure as its source gave it. The number in brackets is its place in the source list.

Buildings
1 building operator page, verified October 27, 2026
[1] dataholdings.com
Power it would draw
6 MW the developer's figure About 0 percent of New York City's summer peak demand in 2024.
[1] dataholdings.com
Who leads it
Data Holdings / Stack41 as stated by the source
Undisclosed in public filings
Land, Water, Who would use it, Jobs once it runs, Tax each year
The math behind the comparison
  1. Data Holdings Milwaukee Data Center (Stack41), capacity: 6 MW.
  2. New York City (NYISO Zone J) summer peak demand, actual, 2024: 10,245 MW (2024).
  3. 6 ÷ 10,245 = 0 (MW over MW).

Sources:

A comparison is arithmetic on two published rows and is never a new fact (how comparisons are made).

Every field, with who said it and when (Researcher view)

Impact figures

FieldValueWho says soSourceLast verified
How much power it needs 6 MW the developer's figure [1] dataholdings.com October 27, 2026
How much water it would use
How loud it would be
Jobs once it runs
Tax it would pay each year

The record's fields

FieldValueWho says soSourceLast verified
Who is building it Data Holdings / Stack41 as stated by the source October 27, 2026
Who is constructing it
How much land
Buildings 1 building operator page, verified October 27, 2026 [1] dataholdings.com October 27, 2026
Where its power comes from
Grid connection
How it is cooled

How much power it needs, also reported: 17 MW, 2026 (bnd.com: Data Holdings, a 46,000 square foot data center in Milwaukee owned by the Forest County Potawatomi tribe, uses up to 17 megawatts of energy) .

A blank value cell means not disclosed by any source on file; a blank basis cell means the source gave the figure without saying on what basis.

The developer's figure is what the company said; what a permit allows is the ceiling a permit sets; measured means observed. Water is in gallons a day or a year, whichever the source stated; a tax claim given as a range shows both ends, each linked to the source that gave it.

Still not public, and where it would show up

The record adds each the day a source gives it. Why these documents.

  • Water use A state water right filing or a water supply agreement.
  • Who would use it A lease announcement or a tenant named in a filing.
  • Jobs and tax An incentive agreement, a county's economic development filing or a fiscal note.

What was decided

Acts of Milwaukee County and Milwaukee about data centers, on the record with their source. A rule about the area is not a decision about this record.

DateWhoDecisionSource
Milwaukee Milwaukee City Plan Commission held public hearing and discussion on proposed one year moratorium on new data center developments wtmj.com
June 15, 2026 Milwaukee, WI $1 billion Microsoft data center proposal gets final approval Milwaukee City Council 2clips

In Milwaukee, Milwaukee County (WI), Milwaukee City Council and local residents debated municipal data center siting, utility infrastructure load, water consumption, and zoning rules during the June 15, 2026 session.

  1. Milwaukee City Council Officials and Speakers Elected Official auto captions, unchecked
    "CENTER NEAR THE FOXCONN SITE IN MOUNT PLEASANT, A COMPANY REP SAYS THAT THE PROPOSAL WOULD LIKELY BRING. >> HUNDREDS OF JOBS. TAYLOR LUMPKIN HAS MORE. >> MICROSOFT OFFICIALS ARE EAGER TO GET STARTED ON THEIR PROJECT TO BEGIN BUILDING THEIR NEXT BILLION DOLLAR DATA CENTER IN MOUNT PLEASANT ALL OF THE INFRASTRUCTURE. THAT'S NOT THE SIZE THAT WE NEED. IT'S READY TO GO. MICROSOFT REPRESENTATIVE SAID THERE ARE"
  2. Resident public comment Resident Public Comment auto captions, unchecked
    "THEY ENTER RACINE COUNTY. AND THAT'S SOMETHING RESIDENTS INCLUDING ALPHONSO GARDNER IS HAPPY TO HEAR. HE SAYS HE HAS SOME RESERVATIONS ABOUT THE COMPANY COMING TO THE AREA. >> AND ONCE A TECH COMPANY TO HELP IMPROVE THE LIVES OF BLACK FAMILIES IN THE COUNTY, MICROSOFT NEED TO UNDERSTAND WHEN THEY COME HERE, THEY HAVE TO DEAL WITH EVERYBODY. >> EVERYBODY HAS YOU CAN GET AN OPPORTUNITY. ONLY 8% OF BLACKS IN THIS COUNTY A"
Open full hearing record (2segments) →

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What happened

No dated entry is on the record yet.

  • Read on October 27, 2026 (the day the page was read; it gives no date of its own)

    Verified facility status from Wisconsin state agency permits, utility dockets, municipal planning filings, or operator campus specifications.

    [1] dataholdings.com

The site

The pin is the site's address.

The site map is at the top of the page.

Where
3135 West Highland Boulevard, Milwaukee, WI 53208, Milwaukee, Milwaukee County, Wisconsin [1] dataholdings.com
How exactly it is located
Exact, at the address
The parcel
No parcel outline in the public record
Nearest homes
Not computed for a record placed at a place center

USGS NAIP aerial view of Data Holdings Milwaukee Data Center (Stack41)
LAT 43.04480 / LON -87.95320 Imagery: U.S. Geological Survey / USDA NAIP (Public Domain)
USGS National Map OpenStreetMap

Comparisons

1 metric with more than one figure

Every figure on the record for the same thing, the record's own or the document's first, each with who gave it, its date and its basis.

Capacity at full buildout

2 figures, 2 sources
6 MW Developer's figure

Data Holdings / Stack41, Oct 26, 2026

17 MW Reported

bnd.com, Sep 27, 2026

Show each source's words
  • 17 MW, bnd.com: Data Holdings, a 46,000 square foot data center in Milwaukee owned by the Forest County Potawatomi tribe, uses up to 17 megawatts of energy

Keep going

The county Milwaukee County 5 projects on the record. The state Data centers in Wisconsin Every Wisconsin project, the rules on the record and what comes next. Nearest proposal Microsoft Sturtevant Data Center Sturtevant, Racine County, 24 mi away · Proposed
Know when Data Holdings Milwaukee Data Center (Stack41) changes.Follow this project

Questions about this project

7 questions answered from the record

Answered from the rows on this page.

How big is Data Holdings Milwaukee Data Center (Stack41)?

The record has 2 measures of its size: 6 MW (the developer's figure, dataholdings.com) and 1 building (operator page, verified October 27, 2026, dataholdings.com). Its acreage is not disclosed.

Who is building Data Holdings Milwaukee Data Center (Stack41)?

Data Holdings / Stack41 is the developer. No construction contractor is named on the record yet.

Who will use Data Holdings Milwaukee Data Center (Stack41)?

Not disclosed. No source on file names a tenant, says whether the site is single or multi tenant, or states what it is for. The record keeps the use as not disclosed until one does; see Who it serves.

How much power and water does Data Holdings Milwaukee Data Center (Stack41) say it needs?

Power: 6 MW (the developer's figure, dataholdings.com). Water: not disclosed by any source on file.

Where does Data Holdings Milwaukee Data Center (Stack41) stand today?

It is running; the date it reached that stage is not sourced, only the day a page was read. No dated entry is on the record yet.

What has Milwaukee or Milwaukee County decided about it?

Milwaukee: Milwaukee City Plan Commission held public hearing and discussion on proposed one year moratorium on new data center developments (September 28, 2026, wtmj.com). 1 event is on the county's rows; a rule about the area is not a decision about this record.

What is still unknown about Data Holdings Milwaukee Data Center (Stack41)?

Not disclosed by any source on file: how much water it would use, how loud it would be, jobs once it runs, tax it would pay each year, who is constructing it, how much land, where its power comes from, grid connection, how it is cooled. No missing primary document is listed for this record yet; What the record lacks is where one appears when a person names it.

Sources

Primary documents first: filings, minutes, dockets and official pages. Then reporting. The numbers are the ones the entries above cite.

Reporting

  1. Data Holdings Milwaukee Data Center (Stack41) Official Disclosure, Data Holdings / Stack41, query feed

1 source on file.

About this data

Last verified
Next check Feeds every four hours, pages daily.
Sources read 1 source on file, 0 primary
Figures Each figure as its source gave it, with its basis; another source's figure never stands in for the record's own, and nothing is estimated.
License Data CC BY-NC 4.0; free for personal, academic, civic and newsroom reporting with attribution. Using this data in a report? Support the record. Commercial use needs a license. Prose stays under copyright.
Cite this page Data Center Record, "Data Holdings Milwaukee Data Center (Stack41)", https://datacenterrecord.org/projects/stack41-llc-data-holdings-milwaukee-milwaukee-wi, last verified October 27, 2026. CSV · JSON

Last verified , first recorded . Every correction is logged on the corrections page. Report a correction · Send a tip about Data Holdings Milwaukee Data Center (Stack41)

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Cite this page

Data Center Record, "Data Holdings Milwaukee Data Center (Stack41)", https://datacenterrecord.org/projects/stack41-llc-data-holdings-milwaukee-milwaukee-wi. Data: Data Center Record, datacenterrecord.org, CC BY-NC 4.0.

The structured rows are CC BY-NC 4.0. Link to this page; that is what turns a reuse into a citation. Commercial use needs a license. Prose stays under copyright.

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For researchers
Stage
Running
Tier
built from one source
Tags
Built from one source
Coordinates
43.0448, -87.9532
How the location is known
Location from the site's street address.
Location source
https://dataholdings.com/
Coordinate source
Data Holdings Milwaukee specification
How capacity was disclosed
the developer's figure
Capacity, if disclosed
6 MW, the developer's figure
Published
October 21, 2026
Last verified
October 27, 2026
Undisclosed in public filings
Location source number, Location last verified, EPA registry id, Uses, Tenancy, Cooling, How water was disclosed, How acreage was disclosed, Interconnection, Rating of the county's rows

Researcher view · Data Holdings Milwaukee Data Center (Stack41) · 1 source, 1 entry, 1 decision nearby · basis and source tier on every row · verified October 27, 2026

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