Overview
Between Austin and San Antonio
Compare the campuses by capacity, land or disclosed capital.
The I-35 South Data Center Corridor runs through Hays, Caldwell and Guadalupe counties between Austin and San Antonio, which have their own pages. It is the southward supernode of the Austin Supercluster and the youngest: no campus is operating yet. CloudBurst's first 50 MW, due late 2026, would be the corridor's first live power.
Five developers hold about 5,000 acres with 5,200 MW of disclosed planned capacity, most of it in unincorporated Caldwell County around Uhland and Maxwell. PowerHouse leases a 500-acre pad inside Tract. Tract, Edged and Prime sit within six miles of the FM 2720 and SH 142 intersection, on land that had no data centers before 2024.
Under construction Planned or pre-construction Contested A blank bar is a figure the developer has not disclosed.
All campuses as a table
| Campus | County | Planned | Acres | Capital | Power | Developer | Status |
|---|---|---|---|---|---|---|---|
| Tract Caldwell Valley | Caldwell | 4,000 MW | 3,000 | - | Grid and on-site gas | Tract (powered land; operators lease pads) | Site prep under way; Bluebonnet and LCRA substation scaling to 1.6 GW; no tax abatement requested |
| Sabey San Marcos | Hays | - | 786 | - | Grid | Sabey Data Centers | City council negotiation opened June 2025 |
| CloudBurst Evolve San Marcos | Hays / Guadalupe | 1,200 MW | 706 | $14.5B | On-site gas | CloudBurst and Evolve Holdings | Broke ground November 2025; Energy Transfer Oasis gas for more than 1.8 GW of generation |
| PowerHouse (pad inside Tract) | Caldwell | 700 MW | 500 | - | Grid and on-site gas | PowerHouse Data Centers (AREP) | A 500-acre pad inside Tract Caldwell Valley, not added to the totals; de-annexed from Uhland April 2026 |
| Edged Energy Maxwell | Caldwell | - | 330 | $7.3B | Grid | Edged (Endeavour) | Beside the LCRA Timmerman 380 MW peaker; waterless ThermalWorks cooling; Phase 1 building from June 2026 |
| Prime Project Snow | Caldwell | - | 206 | $4.2B | Grid | Prime Data Centers | Nine buildings in three phases; Caldwell County abatement and TIRZ approved March 2024 |
Tract Caldwell Valley
The Corridor's Largest Site
Featured campus
Tract Caldwell Valley Technology Park
- Land
- 2,973 contiguous acres near Uhland
- Planned
- Up to 4 GW
- First phase
- 360 MW, 250 MW contracted, Q1 2028
- Power
- Bluebonnet and LCRA substation to 1.6 GW; Kinder Morgan Permian Highway gas
- Model
- Powered land: Tract entitles and powers pads, operators lease and build
- Incentives
- No tax abatement requested
Tract does not run data centers. It buys large parcels, wins zoning, power and fiber, and leases shovel-ready pads to operators who build their own halls. It closed 1,515 acres from Walton Global Holdings in May 2025 and added 1,458 more in January 2026, lifting the master plan to 4 GW, about four times the whole Cedar Creek cluster.
First power
Zero Megawatts Today
CloudBurst comes first because it does not wait for the grid: Energy Transfer's Oasis pipeline can supply more than 1.8 GW of on-site generation, more than the campus plans to use. Tract and Edged connect through Bluebonnet and LCRA substations and arrive in 2028.
Why here
Four Constraints Solved, One Open
| Power | Three paths: the grid through Bluebonnet and LCRA, Energy Transfer's Oasis pipeline and Kinder Morgan's Permian Highway pipeline for on-site gas, and the LCRA Timmerman peaker at Maxwell |
|---|---|
| Land | Former farm parcels in the hundreds to thousands of acres at rural prices; Tract alone holds about 3,000 |
| Permitting | Unincorporated Caldwell County approves the largest campuses through the commissioners court, with no city zoning layer |
| Fiber | Long-haul routes along I-35 between the Austin and San Antonio interconnection points |
| Water | Not solved: Edwards Aquifer drought rules and local opposition; San Marcos denied a project inside city limits in February 2026 |
Edged's waterless cooling and the on-site gas plants with dry cooling are the corridor's answers to water. Evaporative cooling at gigawatt scale is still the limit that permitting speed cannot get around.
In the supercluster
Two Data Center Vectors South and East
I-35 South holds more planned capacity, land and developers than the Cedar Creek cluster, but Cedar Creek has a building nearing completion while I-35 South's first megawatt is still months away. They draw on different gas pipelines, substations and county governments, and both serve a buildout whose manufacturing core sits at Giga Texas and Samsung Taylor.
Record
Dataset Record
- Dataset
- Texas data centers (texas_data_centers) for Tract, CloudBurst, PowerHouse and Sabey; developer-stated figures for Edged and Prime
- Extent
- Hays, Caldwell and Guadalupe counties; Austin and San Antonio excluded
- Capacity
- Planned full buildout as disclosed; Edged, Prime and Sabey have not disclosed megawatts
- Map
- Locations approximate; pipelines schematic
- Last verified
- Q4 2026