How much power does Sentinel Data Center: Project Shirley use?

Sentinel Data Center: Project Shirley has a reported power capacity of 500 MW.

Has Sentinel Data Center: Project Shirley had environmental violations?

As of the latest EPA ECHO sync, no enforcement actions are on record for Sentinel Data Center: Project Shirley.

Where is Sentinel Data Center: Project Shirley located?

Sentinel Data Center: Project Shirley is in Hebron, Lake County, IN.

Proposed

Sentinel Data Center: Project Shirley

Hebron, Lake County, IN

Source: Primary source

Sentinel Data Center: Project Shirley is a proposed data center in Lake County, IN, operated by Sentinel. DataCentersExposed has documented 500 MW of reported power capacity at this site.

Reporting by Eric Keller · Updated Jun 18, 2026

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Lake, Indiana

supporters

Sentinel Data Center: Project Shirley in Hebron, IN is contested. Emerging Concern Track what's being decided, when, and how to weigh in.

Your action kit

Sourced arguments and ready-to-send letters — every figure links to a primary record. Edit to add your own story.

Power & your bill

500 MW of new demand — roughly a city of 400,000 homes.

Large new loads can raise transmission and capacity costs that land on every ratepayer. Residential power in IN is 17.9¢/kWh, up 8.8% year-over-year. (MW→homes is a rough ~800/MW planning figure.)

Source

Process

Demand a full, public review — not a rubber stamp.

Ask for an independent noise study, a water-and-power impact assessment, enforceable conditions (setbacks, hours, cooling type), and that the record stays open for written comment. Procedural shortcuts have voided approvals elsewhere.

Public comment (editable)

Edit freely before sending — it's a starting point. Add your own story; personal comments carry the most weight.

Records / FOIA request

Public Records Request

To the records custodian for Lake County, IN,

Under the applicable public-records law, I request copies of the following records concerning the data-center project known as "Sentinel Data Center: Project Shirley":

1. The complete application, including any rezoning, special-use/conditional-use permit, or site-plan submissions and all exhibits.
2. All staff reports, analyses, and recommendations.
3. Any traffic, noise, water-use, stormwater, or utility/load studies submitted or commissioned.
4. Any development agreement, proffers, or tax-incentive/abatement agreements and their term sheets.
5. All correspondence between the applicant (or its agents) and county/city staff or elected officials regarding this project.
6. Notices of public hearings and proof of required public notice.

I request these in electronic form where available. If any portion is withheld, please cite the specific exemption. If fees will exceed $25, please contact me first.

Thank you,
[Your name]
[Your email / address]

Edit freely before sending — it's a starting point. Add your own story; personal comments carry the most weight.

Join the campaign

Add your name and we'll email you before every hearing, with what to say and where to show up.

Neighbors taking a stand

Be the first to say why this matters. Public notes appear here to show officials the strength of local feeling.

Real parent

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Operator

Sentinel

Power

500 MW

Attribution & capacity confidence:mediumprimary source

Overview

source: link

Announced investment: $5.0B. Imported from the FracTracker Alliance U.S. Data Centers Tracker after review. Details to be corroborated from primary sources.

Operator chain

Files as
Sentinel
This facility
Sentinel Data Center: Project Shirley

Grid & water — why here

source: HIFLD · EPA

Nearest substation

8.1 mi

Thayer · 138 kV

Transmission line

94 ft

345 kV line

Municipal water

No service area

self-supplied or unmapped

The closest existing grid infrastructure and the municipal water system this location sits in — the same constraints the buildout model screens on (it won't site a campus more than ~2 km from a substation or ~5 km from municipal water). Distances are straight-line to public HIFLD/EPA features, not a metered connection.

In the news

source: GDELT

No recent coverage found for this facility.

Tax breaks & subsidies

source: Good Jobs First / GASB 77

No per-deal tax break is linked to this site yet. No state discloses the recipient of a data-center abatement at the facility level, so per-site deals are rare in the public record. If you have a development agreement or board resolution for this site, send it to us.

Water use

No public record of this facility's water use. We check state withdrawal reporting for self-supplied sites; municipally supplied sites only become visible through a public-records request to the local water utility — a per-facility request tool is coming. If you have a utility document for this site, send it to us.

EPA permits & violations

source: EPA ECHO

No reported violations as of last sync.

Nearest school

source: HIFLD / NCES

The nearest public school, Hebron Middle School in Hebron, is 4.4 mi from this site (220 students).

Schools are sensitive receptors for the noise, backup-generator exhaust, and traffic a large data center brings. Straight-line distance to the nearest public school (HIFLD/NCES, US public schools only).

Hearings timeline

No public-hearing records linked to this site yet. We surface planning-commission and board-of-supervisors dates when a record names a facility. If you know of a hearing on this site, tell us.

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