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Data center campus · Unincorporated Cameron County between FM 509 and FM 106, directly east of Valley International Airport and about four miles southwest of Rio Hondo, Cameron County, Texas

Fluidstack Cameron County AI data center campus

Under construction as of Sept. 10, 2026

Fluidstack started building the first $4 billion phase of an AI data center campus on more than 1,100 acres east of Valley International Airport near Rio Hondo, using closed-loop cooling and no local tax abatement. Also known as: Fluidstack Rio Hondo.

Cite← Texas data centers
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PowerNot statedNot reported in the records found
Site1,100acres

Who is behind it

ProjectFluidstack Cameron County AI data center campusAlso: Fluidstack Rio Hondo
Developer and teamFluidstack
End userNot found in the recordsNot yet named in any record or credited report we have found.

The record, newest first

  1. Construction Review Online reported AEP Texas will provide transmission, with Fluidstack paying for its own electrical infrastructure; East Rio Hondo WSC will supply water; phase one is targeted for mid-2028 and no anchor tenant has been named. (Construction Review Online, Sept. 11, 2026)

  2. KRGV reported Fluidstack had begun construction on the first phase of a $4 billion campus on 1,100-plus acres after getting a county worksite permit; the company said it would pay full property taxes and cover its own infrastructure costs. (KRGV, Sept. 10, 2026)

Conflicts and open questions

  • Separate from the Eneus Energy RGV campus, also proposed east of Valley International Airport.
  • Harlingen Mayor Norma Sepulveda said the city lacked authority to stop the project; U.S. Rep. Vicente Gonzalez has said he opposes data center development until the region has enough water, a reliable grid and a long-term plan (KRGV).

The full record

Status note
Work on the first phase began after Cameron County issued a worksite permit; phase one targeted for mid-2028.
Power note
Fluidstack has not disclosed capacity; a trade outlet's 400-500 MW figure is its own estimate and is not used.
Evidence
News reports; primary records not yet obtained
Size class
50 MW or more (tracker scope)
Map position approximate, from the reported address or area. Updated Oct. 17, 2026.