Medina Technology Park (BZ-322)

Status

Proposed / in development

Developer / parties

Medina County Power NR I, LLC (developer; end user not named)

Location

Unincorporated Medina County near Castroville (1400 CR 4516, per the developer's PUCT filing), Medina County

Size

500 MW data center (developer's PUCT complaint); MW, building count and acreage not otherwise stated

Reported benefits

Developer says it has a binding end user agreement (end user not named) and that the project has been coordinated with county commissioners for over two years (developer filing)

Concerns / impacts

Developer filing lists ~168 backup generators for the full 500 MW, up to ~222 with added redundancy, 3.0 MW each, diesel Tier 2 or Tier 4 under TCEQ permits-by-rule (developer filing); no TCEQ authorization opened

Last verified

2026-10-29

Power

• Company claim STEC Alsatian 138 kV substation; MEC/STEC facilities agreements; ERCOT LLI-2096 / BZ-322 (PUCT Docket 60356): Developer filing: new STEC-owned Alsatian 138 kV substation on the Castroville-Pearson line; facilities agreements with MEC (Jul 1 2025) and STEC (Jul 18 2025). interchange.puc.texas.gov ↗
• Company claim Diesel backup generators (~168-222 x 3.0 MW, planned): Developer filing: ~168 backup gensets for 500 MW, ~222 with added redundancy, Tier 2/Tier 4 diesel under TCEQ permits-by-rule; no permit opened. interchange.puc.texas.gov ↗

Water

• Company claim East Medina County Special Utility District non-standard service agreement (under negotiation): Developer filing: water from East Medina County SUD under a non-standard service agreement then being negotiated, expected by Aug 2026; current status not found. interchange.puc.texas.gov ↗

Power and water projects tied to this data center: on-site or dedicated generation, utility and grid capacity deals, substations, water supply, reclaimed water and wastewater permits. Each item is labeled by source type.