Sue Data Centers

Data Center Registry

CoreSite DE3

Denver, Denver County, Colorado · All 16 CoreSite sites

Under constructionContestedAI mixed useRecord updated August 26, 2026

CoreSite DE3 is a data center under construction in Denver, Colorado (Denver County), operated by CoreSite. The public record puts it at announced October 2025, 60 MW planned. It is the subject of active public debate, with hearings, petitions, or organized opposition on record.

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.

Facility record

Under construction

Operator
CoreSite
Facility type
Data center, AI use mixed
Location
4900 Race Street, Denver, Denver County, CO, 80216
Coordinates
39.7392, -104.9903
Power capacity
60 MW planned
Land
Not established from a public source
Investment
Not established from a public source
Announced
October 2025
Utility
Xcel Energy
Power source
Grid
Cooling
Evaporative
Water use
0.115 million gallons a day, reported
Jobs
Not established from a public source
Public subsidy
Not established from a public source
Community reception
Contested
Source confidence
Confirmed by multiple independent sources or official documentation

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.

  1. October 2025
    Under construction
    CoreSite reached a key construction milestone on DE3, a Denver campus expansion (~600k sq ft, 60 critical MW) Source: CoreSite / American Tower

Opposition and litigation at this site

Yes. CoreSite DE3 in Denver, Denver County, Colorado is contested. Hearings, public comment, petitions, or organized opposition are on record, and no lawsuit has been filed so far. Elyria-Swansea residents have opposed the project over water use, air pollution and noise since construction began, holding a neighborhood press conference in February 2026; the backlash helped prompt Denver's one-year moratorium on new data center approvals, passed by city council in May 2026, which blocks CoreSite's two additional planned buildings but not the one already standing.

How the community has taken it

Reception is a sourced signal, not an editorial judgment: contested means active public debate is on record, with hearings, petitions, or organized opposition, without litigation.

Elyria-Swansea residents have opposed the project over water use, air pollution and noise since construction began, holding a neighborhood press conference in February 2026; the backlash helped prompt Denver's one-year moratorium on new data center approvals, passed by city council in May 2026, which blocks CoreSite's two additional planned buildings but not the one already standing. Generator startup testing in July 2026 drew complaints from neighbors at the adjacent Viña Apartments and from Tepeyac Community Health Center; a local science teacher won a community grant to measure infrasound at the site.

Source: Denverite / CPR News

Power and water

The Colorado Sun reports CoreSite will draw from the Xcel grid rather than building its own generation; the fully built three-phase development would draw 65 to 75 MW, with phase one about 18 MW. Backup only: 14 diesel generators able to supply roughly 18 MW during outages; under its state air permit no single engine may be tested more than 25 hours a year, between 7 a.m. and 7 p.m.

A CoreSite spokesperson told CPR News the facility is expected to consume an average of 115,000 gallons per day and 230,000 gallons per day at peak capacity, using evaporative cooling.

Notes on the record

DE3 Denver campus expansion: ~600,000 sq ft, 60 critical MW. CoreSite is a colocation/interconnection operator hosting AI/cloud tenants → mixed_use. Coordinates are the Denver centroid. Owned by American Tower.

What the record does not establish, and the document that would

In every fight on our tracker the decisive fact came out of a public records request. These are the requests for this site.

  • Tax abatements or other public subsidy
  • Permanent jobs promised
  • Land area
Which document closes each gap
Tax abatements or other public subsidy
The abatement, PILOT, or development agreement approved by the county, city, or development authority, and the state's data center sales tax exemption certificate if one was issued.
Permanent jobs promised
The economic development application or incentive agreement, which usually states a job commitment and a clawback.
Land area
The rezoning application, the plat, or the deed recorded with the county.

Have one of these documents? Send it to us and we will add it to the record with attribution.

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.

Questions people ask about this site

Is there opposition to the CoreSite DE3 data center in Denver?

Yes. CoreSite DE3 in Denver, Denver County, Colorado is contested. Hearings, public comment, petitions, or organized opposition are on record, and no lawsuit has been filed so far. Elyria-Swansea residents have opposed the project over water use, air pollution and noise since construction began, holding a neighborhood press conference in February 2026; the backlash helped prompt Denver's one-year moratorium on new data center approvals, passed by city council in May 2026, which blocks CoreSite's two additional planned buildings but not the one already standing.

Has anyone filed a lawsuit over the CoreSite DE3 data center?

No lawsuit over CoreSite DE3 appears in the record we track as of August 26, 2026. Residents most often reach a lawyer over water supply, well drawdown, noise from cooling plant, property value, or a rezoning approved without the notice the ordinance required. If any of that is happening near this site, it is worth a review whether or not a case has been filed yet.

How much water does CoreSite DE3 use?

0.115 million gallons a day is the reported figure on record. Cooling is recorded as evaporative. A CoreSite spokesperson told CPR News the facility is expected to consume an average of 115,000 gallons per day and 230,000 gallons per day at peak capacity, using evaporative cooling.

Who operates CoreSite DE3, and how big is it?

CoreSite is the operator on record. We hold 16 sites for that company across the registry. Capacity on record is 60 MW.

How to cite this page

SueDataCenters.org Data Center Registry, "CoreSite DE3," updated August 26, 2026, https://suedatacenters.org/data-centers/coresite-de3-denver-co.

Facility data from Compute Atlas (E. Kubiak), version 1.32.0 (September 7, 2026), licensed CC BY 4.0, record https://www.compute-atlas.com/facilities/coresite-de3-denver-co, retrieved September 14, 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. 1.CoreSite Achieves Key Construction Milestone for New DE3 Data Center in Denver · CoreSite / American Tower · retrieved July 7, 2026
  2. 2.HIFLD Electric Retail Service Territories (ORNL/DOE-CESER, 2023-08 vintage) · Oak Ridge National Laboratory (ORNL) / HIFLD · retrieved July 23, 2026
  3. 3.CoreSite DE3, Denver Data Center · CoreSite · retrieved August 26, 2026
  4. 4.Denver data center generators draw noise complaints in Elyria-Swansea (read via Internet Archive) · Denverite / CPR News · retrieved August 26, 2026
  5. 5.Colorado's biggest data center wants to add another 98 diesel backup generators, CoreSite water-use figures (read via Internet Archive) · Colorado Public Radio · retrieved August 26, 2026
  6. 6.What's the status of massive data centers in Colorado? (read via Internet Archive) · The Colorado Sun · retrieved August 26, 2026

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