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Data center campus · Former Monticello Thermo mine along State Highway 11, just outside Sulphur Springs, Hopkins County, Texas

Sulphur Springs data center campus (former Thermo mine)

Proposed as of Sept. 24, 2026

A phased data center campus on reclaimed coal-mine land outside Sulphur Springs. It was first pitched by MSB Global and is now being evaluated by CyrusOne, with onsite gas generation planned at startup. Also known as: The Matrix Center, Matrix Data Center, MSB Matrix, CyrusOne Sulphur Springs Data Center.

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PowerNot statedNot reported in the records found

Who is behind it

ProjectSulphur Springs data center campus (former Thermo mine)Also: The Matrix Center, Matrix Data Center, MSB Matrix, CyrusOne Sulphur Springs Data Center
Developer and teamCyrusOne
MSB Global Services (former developer)
End userNot found in the recordsNot yet named in any record or credited report we have found.

The record, newest first

  1. CyrusOne's project page describes a phased campus on the former Thermo mine with $5-10 billion of investment if fully built, startup power from new onsite natural gas generation, and a later grid tie. (CyrusOne, undated)

  2. CyrusOne held a community meeting at the Hopkins County Civic Center. It said the project was still under consideration and estimated the investment at about $2.6 billion. (KLTV, Sept. 24, 2026)

  3. At a council meeting, members referred to CyrusOne taking over the Matrix Data Center project. The city manager deferred a public update to a later meeting. (City of Sulphur Springs, Aug. 4, 2026)

  4. The Sulphur Springs City Council readopted amended versions of the letter of intent and Chapter 380 agreement, which the city attorney said was meant to address a resident's lawsuit over Open Meetings Act compliance. The mayor said MSB Global would be phased out and a new developer would take over. KLTV also reported that the former landowner had sued the city over the deed. (KLTV, June 2, 2026)

  5. KTBB reported that the city had gone to state district court against Luminant and Vistra, the land's former owners, over a 2019 deed restriction on power generation that Vistra had invoked in a cease-and-desist letter; the Texas attorney general's office filed a brief supporting the city. (KTBB, Nov. 19, 2025)

  6. Construction Equipment Guide summarized MSB Global's plan: eight buildings with 800 MW of IT load in Phase I, another 1,200 MW in Phase II, and the first building targeted for March 2026. (Construction Equipment Guide, Oct. 15, 2025)

  7. KLTV reported that land clearing had begun for MSB Global's AI data center project near Sulphur Springs. (KLTV, Sept. 30, 2025)

Conflicts and open questions

  • MSB Global's earlier plan cited 800 MW (Phase I) plus 1,200 MW (Phase II), 30 buildings and more than 16,000 acres. CyrusOne has not disclosed MW or acreage, so mw is left null.
  • Coordinates are approximate, centered on Sulphur Springs. The exact mine parcel was not mapped.
  • CyrusOne's page is undated and was read on 2026-10-29.
  • The deed restriction on power generation is in court; the record notes the filings as reported and makes no finding on the claims.

The full record

Status note
CyrusOne is now the developer and says the project is still in due diligence and planning. The earlier developer, MSB Global, had begun site work in 2025.
Evidence
Primary public records
Size class
Under 50 MW (outside main scope; kept for completeness)
Map position approximate, from the reported address or area. Updated Oct. 17, 2026.