SpaceX filed an application for property tax abatements with Grimes County, Texas, for a semiconductor fabrication and advanced-packaging facility branded 'Terafab' that would cost $55 billion in initial phases and up to $119 billion if all planned expansions are completed. The site is the former Gibbons Creek Reservoir coal-plant property, operated 1982-2018 by the Texas Municipal Power Agency, acquired by Charah Solutions in 2021 for demolition and remediation, then sold off in parcels to undisclosed buyers (now apparently SpaceX). The site is roughly 20 miles east of Bryan-College Station. Per Musk's framing, Terafab is intended to combine logic, memory, and advanced packaging in one facility, manufacturing chips for SpaceX, xAI, and Tesla. Grimes County Commissioners held a public hearing but took no action on the tax abatement at the May 5-7 session; formal vote scheduled June 3. Separately, ERCOT's Protocol Revision Subcommittee (PRS) was scheduled to vote May 6 on PGRR145 (Planning Guide Revision Request — the Batch Zero process for large-load interconnections) and NPRR1325 (Nodal Protocol Revision Request — operationalizing the Provisional Controllable Load Resource framework that lets large loads commit to partial firm + curtailable service); the Reliability and Operations Subcommittee (ROS) vote follows today; TAC final stakeholder vote is still locked for May 19-20. ERCOT had not posted public meeting minutes from the May 6 PRS as of evening publish time; vote outcome and any stakeholder amendments will require ERCOT calendar / market-notice retrieval tomorrow.
Primary source · Tom's Hardware / KBTX / TechCrunch / ERCOT ↗
Why it matters
Two items. (1) Terafab is a chip-manufacturing fab, not a data center, so it doesn't directly fit Cliff's submission-readiness wedge — but it's load-bearing for ERCOT load-realization scoring and for the firm-equivalent-mw underwrite. A $119B full-buildout chip fab on a former coal plant site in ERCOT North Central adds substantial new electrical load, water draw, and downstream gas-pipeline demand to a load zone Cliff's calculator already models for hyperscaler siting. Three direct read-throughs: (a) Gibbons Creek already has retired-coal-plant transmission interconnection assets in place, which is the second instance this week (Stratos UT via Ruby Pipeline tap, Sopaipilla El Paso via existing trunk infrastructure) where AI-adjacent capex is preferentially landing on stranded retired-fossil-asset sites — this is now a pattern, and 'retired coal plant with intact interconnect rights' is a discrete site-selection input worth modeling formally. (b) Adjacent demand: SpaceX/xAI/Tesla will need *more* AI training capacity to serve the chips Terafab produces, plus support data centers near the fab for testing/validation/IT. There's a high probability that Terafab anchors a downstream 1-2 GW data-center campus on adjacent parcels within 24 months — Cliff customers underwriting College Station / Brazos Valley sites should watch this. (c) The June 3 vote is a discrete event-driven catalyst worth scheduling a follow-up entry for. (2) ERCOT PRS/PCLR vote outcome still needs verification. The May 19-20 TAC vote is the structurally locked decision point regardless of how the May 6 PRS vote went, so Cliff's submission-validator product needs to be feature-complete against either possible PCLR variant (as-filed or as-amended) by close-of-business May 18. Pull the ERCOT market notice and PRS meeting recording overnight; if the PCLR LPC math was modified at PRS, the validator's curtailment-economics module needs to update before TAC.
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