Microsoft SAT40 Under construction
Chip types: H100,B300. Epoch AI estimates ~75 MW.
Key facts
- Operator
- Microsoft
- Owner
- Microsoft
- Size
- 75 MW
- Location
- San Antonio, Texas
- Stage today
- Under construction
Source
read 2026-08-14
What to do next
Next step: Under construction — pull the approved conditions and permits and hold the builder to them; an expansion or a new building reopens the record.
What has happened so far (5 events)
- 2018-08-24filing
Microsoft registered TDLR project EABPRJB8824650 (SAT11-14) for three 225,000 sq ft data center buildings at 15000 Lambda Drive, San Antonio, with an estimated cost of $62 million and completion date of December 2023, designed by Corgan Associates. · source - 2023-03-03filing
Microsoft registered TDLR project TABS2023013247 for SAT40, a 153,227 sq ft data center at 15000 Lambda Drive, San Antonio (Bexar County), with an estimated cost of $175.9 million, designed by Page Southerland Page, with construction scheduled from June to September 2023. · source - 2023-06-15construction
Construction began on the SAT40 data center building shell at 15000 Lambda Drive per the TDLR filing, with a scheduled completion date of September 15, 2023. · source - 2023-08-07coverage
San Antonio Report reported that Microsoft had built at least seven data centers in San Antonio and one in Medina County over the prior eight years, investing over $1.2 billion; the article identified SAT40 at 15000 Lambda Drive in Texas Research Park as a $175.9 million project on 70 acres with Turner Construction as the builder. · source - 2025-12-28coverage
San Antonio Report quoted District 6 Councilmember Ric Galvan raising concerns about data center energy demands, limited job creation, industry opacity, and noise impacts in the far west side area where Microsoft operates, questioning what economic return the city receives from tax incentive deals. · source
Find the paper trail
Find the paper trail (0 filed · 11 places to look)
State environmental permits
Backup generators, water withdrawal and stormwater are permitted by the state, usually earlier and in more detail than anything filed locally.
- Texas TCEQ — Air Permits DivisionThe program page: which permits this state requires, and the office that issues them.
- TCEQ Central RegistrySearchable public filings — search the operator, the shell LLC on the deed, and the address.
County & town filings
The rezoning application, site plan, traffic and noise studies, staff report and every revision.
- Search San Antonio planning filingssearchPlanning departments post application files under many different names. Find the department, then ask the clerk for the application number — that number unlocks everything else.
- Search San Antonio property records / GISsearchThe parcel record names the buying LLC and the sale date, which is what ties an anonymous filing to an operator.
Utility & grid records
The electricity request is filed with the grid operator and the utility long before the town hears about it — and states the real load.
- ERCOT (Texas) — interconnection queueRequested megawatts, queue position and target in-service date. The MW here is the real number; the one at the town meeting is often phase one.
- Public Utility Commission of Texas — docket searchSpecial contracts, large-load tariffs and rate cases are docketed here. Testimony and exhibits are public, and are usually more candid than the press release.
- FERC eLibraryFederal filings: transmission agreements, interconnection service agreements, and co-location disputes.
- Search the serving utility for a will-serve lettersearchThe will-serve or load-service letter is the utility's own written commitment. Ask the utility and the PUC for it by name — it is frequently the first document to exist.
Federal databases
Works anywhere, and covers the operator's record at its other sites.
- EPA ECHO facility searchEvery federally-reported air, water and waste permit at a facility, plus its inspection and violation history. Search by address or draw a radius around the site. This project's locality centres on 29.400, -98.730 — search that point with a 5-mile radius.
- EPA EnvirofactsThe same underlying records, queryable by county — useful for 'what else is permitted near this site' rather than one facility.
- EPA Facility Registry ServiceResolves the shell LLC on a permit to the facility it belongs to. Worth a look when the filing name means nothing locally.
These are places to look, not evidence that anything has been filed. Links were checked on 2026-08-21; search links are queries, not records. What to ask for.
Recent news
17 stories tracked since 2026-08-17 across 10 outlets. 9× Local officials are moving to pause or block the project. 5× A community is pushing back on a nearby data center. Most recent: “How Texas Research Park became San Antonio's data center hub” (Yahoo Finance, 2026-10-09).
- How Texas Research Park became San Antonio's data center hub
- How Texas Research Park became San Antonio's data center hub
- Gina Hinojosa targets Gov. Greg Abbott’s campaign donors, data center tax breaks in San Antonio
- Gina Hinojosa targets Gov. Greg Abbott’s campaign donors and data center tax breaks in San Antonio
- Texas data center pause isn't stopping construction of facilities, including one just outside San Antonio
- Data center battleground emerges between Austin, San Antonio
- 'We don't really know the answers': San Antonio realtors say it's too early to tell how data centers affect home values
- Data Center Moratorium Proposal Squeaks Forward in San Antonio
- San Antonio moves to tighten data center rules, holds off on call for moratorium
- San Antonio City Council may regulate, not ban, data centers
- San Antonio City Council signals tighter rules for data centers
- San Antonio city council leans toward data center regulation, but a moratorium seems less likely
+5 more on the story tracker.
Automated news aggregation, not human-verified — follow each link to the original outlet. Part of the story tracker, 17 headlines archived.
Around here
- San Antonio community briefing — Rejectedterm not documented
- Texas briefing — rates, grid carbon, PUC contacts.
Other tracked projects in Texas
- Vantage TX1 — San Antonio, 0 mi Under construction
- Microsoft SAT14 — San Antonio, 3 mi Under construction
- BCG Cedar Creek Campus — Cedar Creek (Bastrop County), 88 mi Awaiting decision
- Meta Temple — Temple, 143 mi
- OpenAI Stargate Milam — Milam County, 144 mi
Cite this page: GridWatch AI, “Microsoft SAT40”, aigridwatch.com/projects/microsoft-sat40, retrieved 2026-10-11.
As of August 2026 (2m ago) · changes weekly — re-check before citing
A working set of identified proposals a community can track, not a census — most of the country's activity is not in here yet. Pennsylvania is the exception: its rows are synced from PA DEP's own data-center permit tracker, so the state's coverage is close to complete and carries the permit trail with it. **Each row carries its own provenance.** Rows showing a verification date link to reporting or the governing body's own record and were read on that date; rows marked *unverified* have no source on record — a lead to check, not a fact to cite. **Stage is derived, not asserted.** *Hearing scheduled*, *Awaiting decision*, *Approved* and *Withdrawn* are computed from each row's milestone dates on every rebuild, so a hearing date that has passed stops reading 'scheduled'. Hearings get moved and projects re-file under new names — treat a scheduled date as the earliest to act by, and confirm with the clerk before relying on it. Leads are mined into data/project_candidates.json and promoted here only after a human reads a primary source.
Part of the data center project tracker — open data, CC BY 4.0 (JSON · CSV).