• Prometheus Hyperscale and Istmo Energy plan a 1.5GW first phase in Reeves County, Texas, with a path to 2.5GW in later phases
  • The campus would use behind-the-meter generation supplied by pipeline natural gas and on-site ethane, with first power targeted for 2027

The fact

Prometheus Hyperscale and Istmo Energy plan to develop an AI data-centre campus in Reeves County, Texas, with 1.5GW of data-hall capacity in the first phase and a path to 2.5GW in later phases. The companies are targeting first power in 2027 through modular deployments, with custom-built facilities potentially following in 2028.

The Pecos campus is designed to generate its own power behind the meter using pipeline natural gas and ethane from Istmo's co-located fractionation facility. The companies also plan to use closed-loop cooling. They have not disclosed a named customer, generation-equipment supplier, financing close or detailed construction schedule, so the 1.5GW and 2.5GW figures remain planned capacity rather than operating load.

The assessment

The project puts power generation on the same schedule as the data centre. Instead of waiting for a utility connection to serve the first phase, Prometheus plans to power the campus with on-site generation fuelled through Istmo's infrastructure. That means the first modules cannot operate until the generation equipment, fuel supply and site electrical systems are ready alongside the data halls.

Nearby gas and ethane supply gives the project access to fuel, but not 1.5GW of usable electricity. The companies still need generation equipment, permits, financing and committed customer load for the first phase. Until those are secured and the necessary infrastructure is built, the announced gigawatts remain planned capacity rather than power that customers can use.

For BTW readers, the 2027 target depends on the power system and the first data-centre modules being delivered together. The clearest evidence of progress will be a defined block of generation tied to committed customer load, rather than the longer-term 2.5GW campus target.

What to watch

Watch for a named customer, generation-equipment supplier, firm fuel agreements, air permits and financing for the first phase. Those milestones will show whether the 2027 target is backed by a buildable power programme. The clearest evidence will be a first generation block tied to a defined data-centre load and construction schedule.