Microsoft SAT40

OperatingEst.AI campusCampusSan Antonio, Bexar County, Texas

Microsoft SAT40 is an operating ai campus in San Antonio, Texas. Operated or owned by Microsoft. Current power: 106 MW (estimated). Verification: verified operating. 10 cited sources.

60% profile completeness

36 claims from 10 sources

Last verified against sources: Oct 12, 2026

Newest dated evidence: Feb 4, 2026

Get changes to Microsoft SAT40

Or subscribe in a feed reader: RSS / Atom

Cite this

Text

Datacenter Source. “Microsoft SAT40.” /facilities/microsoft-sat40-san-antonio-tx. Data as of 2026-10-12. Accessed 2026-10-12.

BibTeX

@misc{datacentersource_microsoft_sat40_san_antonio_tx_2026,
  title = {{Microsoft SAT40}},
  author = {{Datacenter Source}},
  year = {2026},
  howpublished = {\url{/facilities/microsoft-sat40-san-antonio-tx}},
  note = {Data as of 2026-10-12; accessed 2026-10-12. Compiled from cited sources, including OpenStreetMap contributors (ODbL) and Epoch AI (CC BY 4.0)},
}

Please also cite the original source of any specific figure (linked beside it).

Current facility power

106 MW[1]

Est.Likelyestimated

Planned capacity

Not yet sourced

Floor area

Not yet sourced

Buildings (planned)

2[1]

Est.Likelyderived

Capital cost / investment

$2.8B[1]

Est.Likelyestimated

First operational

May 24, 2024[1]

Est.Likelyderived

POWER & GRID

Time-to-power · verification · interconnection

Time to power

Energized — operating

High confidence

Project verification

Verified operating

Operation documented by satellite imagery.

Current stage

Operational

Furthest stage with documented evidence

Utility · ISO

Medina Electric Coop, INC · ERCOT

Substation: On-site substation (likely Rafter Substation)

Power reality

Announced

No record

Interconnection request

No record

Contracted / approved

No record

Under construction

No record

Operational

106 MW[1]

Estimated from buildings observed operational

AI evidence brief

Summarizes only the evidence on this page. Answers citing anything else are rejected automatically.

Project verification

Development

Announcedimplied by a later stage
Land acquiredimplied by a later stage
Planning / zoningimplied by a later stage
Permittingimplied by a later stage

Grid interconnection

Interconnection application
Feasibility study
System impact study
Facilities study
Interconnection agreement / service contract

Build & energization

Financing
Under constructionDec 28, 2018
Model estimate · Satellite imagery
- Dec 28, 2018 · Reported status: under construction[1]
- Dec 28, 2018 · Construction start[1]
- Dec 28, 2018 · Land clearing begins for the site, specifically digging up a parking lot and making outlines for the buildings. Evident on [Google Earth](https://earth.google.com/web/@29.4149522,-[1]
- May 24, 2024 · Reported status: expanding[1]
EnergizationMay 24, 2024
Satellite imagery
- May 24, 2024 · Building 1 operational. Estimated 3 months out from February, when there was still construction equipment.[1]
- Dec 1, 2025 · Building 2 operational. No more construction on building, and surrounding roads are also complete.[1]
OperationalMay 24, 2024
Satellite imagery
- May 24, 2024 · Building 1 operational. Estimated 3 months out from February, when there was still construction equipment.[1]
- Dec 1, 2025 · Building 2 operational. No more construction on building, and surrounding roads are also complete.[1]

● documented · ◌ implied by a later stage · ○ no evidence found. Dates are those of the earliest dated evidence, which can be later than when a stage actually began. Evidence classes: Model estimate, Satellite imagery.

Grid path

facility
Microsoft SAT40
→
substation
On-site substation (likely Rafter Substation)[1][5]
Satellite imageryLikely
1 substation outline traced inside the campus on satellite imagery; OSM maps Rafter Substation 0.15 km away
→
transmission
138 kV line[5]
Proximity onlyUnverified
Highest-voltage line mapped within 2 km (0.1 km away). Not confirmed as the supply path.
→
utility
Medina Electric Coop, INC[2]
Service territoryLikely
Retail service territory containing the site
→
ISO / RTO
ERCOT[4]
Service territoryLikely
Balancing authority: ERCO

Substation capacity:: not published
Required upgrades:: not yet sourced
Congestion:: not yet sourced (no nodal price data)

Dashed boxes are based on proximity only and do not establish which asset serves the site.

Interconnection records

No interconnection-queue record is linked to this site. Of the ISOs we ingest, only NYISO publishes large-load requests; PJM, ERCOT, MISO, SPP and CAISO queues list generation only.

On-site & dedicated generation

No on-site, behind-the-meter or dedicated generation found in sources.

LOCAL IMPACT

Water · generation · incentives · regulation · rates

Water & cooling

Not yet collected: we haven't found a source for water use or the cooling type at this site. Know one? Add a source

On-site generation & air permits

Not yet collected: we haven't found a source for on-site generation or an air permit for this site. Know one? Add a source

Incentives

Not yet collected: we haven't found a source for tax abatements, PILOTs or other incentives for this project. Know one? Add a source

Regulatory events

Not yet collected: we haven't found a source for hearings, rezonings, permits or commission proceedings. Know one? Add a source

Utility & rates

Not yet collected: we haven't found a source for a large-load tariff or commission docket for Medina Electric Coop, INC. Know one? Add a source

Location & imagery

Mapped outline

Coordinates: 29.41625, -98.80475
Address: 15000 Lambda Drive, San Antonio, TX 78245[1]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Feb 4, 2026.Likely
County: Bexar County

Photographs

No openly licensed ground-level photos matched to this site yet.

Ownership, operation & customers

1. Property owner of record
Not identified
2. Owner / developer
Microsoft[1]
3. Operator
Not identified
4. Tenant / cloud
Not identified
5. End customer / workload
Not identified

Power supply

Utility:

Medina Electric Coop, INC(unreviewed)[2]Unverified

Each link is sourced separately. The property owner of record is often a special-purpose entity; the same company appearing in two roles is shown only when sources say so.

All parties with evidence

Owner: Microsoft[1]Confirmed
Utility: Medina Electric Coop, INC(unreviewed)[2]Unverified
Most likely retail provider among 4 overlapping service territories (largest retail sales; territory polygons are approximate). Also overlapping: Karnes Electric Coop INC, Bandera Electric Coop, INC, AEP Texas Central Company.

No tenants or end users identified in our sources yet.

Power (all fields)

Current facility power: 106 MW[1]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Feb 4, 2026.Likelyestimated
Estimated total facility power (IT plus cooling and overhead) at the latest observed milestone.
Current IT capacity: 75 MW[1]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Feb 4, 2026.Likelyestimated
Estimated IT load currently online, based on buildings observed operational.
Estimated annual consumption: 650 GWh/yr[3]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Oct 12, 2026.Speculativeestimated
106 MW × 8,760 h × 70% utilization.
Planned capacity: Not yet sourced

Capacity figures are nameplate or contracted; annual consumption is a labeled model estimate, not metered data.

Grid & electricity

ISO / RTO: ERCOT[4]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Likelyderived
Location falls inside this ISO/RTO footprint.
Balancing authority: ERCO[2]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.Likelyderived
Control area of the containing utility territory.
Nearest mapped substation: Rafter Substation (138 kV)[5]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Sep 28, 2026.Likelyderived
Nearest substation mapped in OpenStreetMap; proximity does not establish which substation serves the site.
Distance to substation: 0.2 km[5]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Sep 28, 2026.Likelyderived
Highest-voltage line nearby: 138 kV[5]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Sep 28, 2026.Likelyderived
Highest-voltage transmission line mapped within 2 km.
State avg. industrial price: 7.07¢/kWh[7]ConfirmedBacked by a filing, deed, permit, interconnection-queue record, or a government or utility record. As of Jul 2026.Confirmed
Texas statewide average, July 2026.
State avg. commercial price: 8.47¢/kWh[7]ConfirmedBacked by a filing, deed, permit, interconnection-queue record, or a government or utility record. As of Jul 2026.Confirmed
Texas statewide average, July 2026.
Generation within 50 km: 4.1 GW[8]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Jan 1, 202502.Confirmedderived
19 EIA-reported plants within 50 km.
Generation queued in county: 4.96 GW[6]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Oct 1, 2026.Confirmedderived
21 active generation interconnection requests in Bexar County: Storage 4,771 MW, Solar 152 MW, Gas 35 MW. Queued projects often don't get built.
Interconnection status: Not yet sourced
Contracted / committed power: Not yet sourced

Nearby infrastructure	Type	Distance	Voltage / capacity	Source
138 kV line	Transmission line	0.1 km	138 kV	[5]
Leon Creek · City of San Antonio - (TX)	Power plant (Natural Gas)	23.3 km	184 MW	[8]
Oci Alamo Solar I Hybrid · OCI Energy LLC	Power plant (Solar)	38.4 km	41 MW	[8]
Blue Wing Solar Energy Generation · Duke Energy Renewables Services	Power plant (Solar)	41.1 km	14 MW	[8]
Arthur Von Rosenberg · City of San Antonio - (TX)	Power plant (Natural Gas)	44.5 km	518 MW	[8]
V H Braunig · City of San Antonio - (TX)	Power plant (Natural Gas)	44.6 km	1.05 GW	[8]
O W Sommers · City of San Antonio - (TX)	Power plant (Natural Gas)	48.1 km	830 MW	[8]
J K Spruce · City of San Antonio - (TX)	Power plant (Coal)	48.4 km	1.35 GW	[8]
Oci Alamo 4, LLC · Consolidated Edison Development Inc.	Power plant (Solar)	49.5 km	40 MW	[8]
Rafter Substation · CPS Energy	Substation	0.15 km	138 kV	[5]
CPS Energy substation · CPS Energy	Substation	1.55 km	138 kV	[5]
Texas Research Substation · CPS Energy	Substation	1.71 km	138 kV	[5]

Largest queued generation in this county	Fuel	Queue status	MW	Source
Howard Road BESSERCOT 29INR0173 · Project Fast Flow LLC	Storage	In study · proposed 2028-04	618 MW	[6]
Orbit Energy StorageERCOT 27INR0082 · GCI Orbit Energy Storage, LLC	Storage	In study · proposed 2027-06	502 MW	[6]
Bernice Energy StorageERCOT 27INR0294 · Bernice Energy Storage LLC	Storage	In study · proposed 2029-02	403 MW	[6]
Mission Station Energy Storage IERCOT 28INR0474 · Mission Station LLC	Storage	In study · proposed 2030-05	375 MW	[6]
Mission Station Energy Storage IIERCOT 28INR0475 · Mission Station LLC	Storage	In study · proposed 2030-05	375 MW	[6]
Quela BESSERCOT 22INR0423 · BRP Quela BESS LLC	Storage	In study · proposed 2027-12	301 MW	[6]

Utility, ISO and nearby assets are derived from the site's location. Proximity to a substation or line doesn't establish the interconnection; that needs a utility filing or interconnection-queue record. Queue requests are applications, not commitments — most never reach operation.

Construction & permitting

Announced
—
Land acquired
—
Permitting
—
Construction start
Dec 28, 2018[1]
First operational
May 24, 2024[1]
Expected completion
—

Buildings (planned): 2[1]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Feb 4, 2026.Likelyderived
Count of building outlines traced on satellite imagery.
Buildings operational: 2[1]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Feb 4, 2026.Likelyestimated

Phase	Status	Added MW	Completed / expected	Source
Building 1	operational	66 MW	May 24, 2024	[1]
Building 2	operational	40 MW	Dec 1, 2025	[1]

Real estate

Official assessments

Assessor's value for a tax year

None sourced yet

Recorded transactions

Sale prices from recorded deeds

None sourced yet

Model estimates

Our model — not an appraisal

None sourced yet

Capital cost / investment: $2.8B[1]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Feb 4, 2026.Likelyestimated
Modeled total capital cost (2025 USD) of capacity currently operational, incl. compute hardware.
Annual property tax: Not yet sourced

No county parcel or assessor records linked yet. County records are currently ingested for Loudoun County, VA and Maricopa County, AZ.

Size

Floor area: Not yet sourced

Compute

Chip types: H100, B300[1]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Feb 4, 2026.Confirmed
Compute (H100-equivalents): 64,700[1]Est.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. As of Feb 4, 2026.Likelyestimated

What changed (last 3 years)

Follow this facility (RSS)

Current IT capacity
47 MWMay 24, 2024[1]EstimatedModeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.→75 MWDec 1, 2025[1]EstimatedModeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.
Current facility power
66 MWMay 24, 2024[1]EstimatedModeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.→106 MWDec 1, 2025[1]EstimatedModeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.
Buildings operational
0Dec 28, 2018[1]EstimatedModeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.→1May 24, 2024[1]EstimatedModeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.→2Dec 1, 2025[1]EstimatedModeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.
Status
Under constructionDec 28, 2018[1]EstimatedModeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.→Operating + expandingMay 24, 2024[1]EstimatedModeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.→OperatingFeb 4, 2026[1]EstimatedModeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure.

Timeline

Construction start: Dec 28, 2018[1]

First operational: May 24, 2024[1]

Dec 28, 2018[1]
Land clearing begins for the site, specifically digging up a parking lot and making outlines for the buildings. Evident on Google Earth.
May 24, 202466 MW facility power· 1 buildings operational[1]
Building 1 operational. Estimated 3 months out from February, when there was still construction equipment.
Dec 1, 2025106 MW facility power· 2 buildings operational[1]
Building 2 operational. No more construction on building, and surrounding roads are also complete.
Feb 4, 2026106 MW facility power· 2 buildings operational[1]
Site has already been completed, with no more visible construction on any building.

Buildings on this campus

Microsoft Texas Research Park CampusOperating
Microsoft TRP2Operating · 170,400 sq ft footprint
Microsoft TRP1Operating · 178,100 sq ft footprint
Microsoft TRP3 (SAT46)Operating · 229,700 sq ft footprint
MicrosoftOperating · 229,700 sq ft footprint
MicrosoftOperating · 229,700 sq ft footprint
MicrosoftOperating · 152,100 sq ft footprint

All claims (provenance audit)

Field	Value	Source	Confidence	As of	Status
Name	Microsoft SAT40	[1]	Likely	2026-02-04	Shown
Status	Under construction	[1] derived	Likely	2018-12-28	Superseded / alternative
Status	Operating + expanding	[1] derived	Likely	2024-05-24	Superseded / alternative
Status	Operating + expanding	[1] derived	Likely	2025-12-01	Superseded / alternative
Status	Operating	[1] derived	Likely	2026-02-04	Shown
Facility type	AI campus	[1] derived	Likely	2026-02-04	Shown
Address	15000 Lambda Drive, San Antonio, TX 78245	[1]	Likely	2026-02-04	Shown
Owner	MicrosoftOwner: Microsoft	[1]	Confirmed	2026-02-04	Shown
Utility	Medina Electric Coop, INCterritory 12268: MEDINA ELECTRIC COOP, INC (COOPERATIVE, MEDINA ELECTRIC COOP, I	[2] derived	Unverified	2022	Shown
Current facility power	106 MW	[1] estimated	Likely	2026-02-04	Shown
Current facility power	66 MW	[1] estimated	Likely	2024-05-24	Superseded / alternative
Current facility power	106 MW	[1] estimated	Likely	2025-12-01	Superseded / alternative
Current IT capacity	75 MW	[1] estimated	Likely	2026-02-04	Shown
Current IT capacity	47 MW	[1] estimated	Likely	2024-05-24	Superseded / alternative
Current IT capacity	75 MW	[1] estimated	Likely	2025-12-01	Superseded / alternative
Estimated annual consumption	650 GWh/yr	[3] estimated	Speculative	2026-10-12	Shown
ISO / RTO	ERCOTELECTRIC RELIABILITY COUNCIL OF TEXAS, INC.	[4] derived	Likely	—	Shown
Balancing authority	ERCO	[2] derived	Likely	—	Shown
Nearest mapped substation	Rafter Substation (138 kV)way/639176169	[5] derived	Likely	2026-09-28	Shown
Distance to substation	0.2 km	[5] derived	Likely	2026-09-28	Shown
Highest-voltage line nearby	138 kV	[5] derived	Likely	2026-09-28	Shown
Generation queued in county	4.96 GW	[6] derived	Confirmed	2026-10-01	Shown
State avg. industrial price	7.07¢/kWh	[7]	Confirmed	2026-07	Shown
State avg. commercial price	8.47¢/kWh	[7]	Confirmed	2026-07	Shown
Generation within 50 km	4.1 GW	[8] derived	Confirmed	202502	Shown
Buildings (planned)	2	[1] derived	Likely	2026-02-04	Shown
Buildings operational	2	[1] estimated	Likely	2026-02-04	Shown
Buildings operational	0	[1] estimated	Likely	2018-12-28	Superseded / alternative
Buildings operational	1	[1] estimated	Likely	2024-05-24	Superseded / alternative
Buildings operational	2	[1] estimated	Likely	2025-12-01	Superseded / alternative
Capital cost / investment	$2.8B	[1] estimated	Likely	2026-02-04	Shown
Compute (H100-equivalents)	64,700	[1] estimated	Likely	2026-02-04	Shown
Chip types	H100	[1]	Confirmed	2026-02-04	Shown
Chip types	B300	[1]	Confirmed	2026-02-04	Shown
Construction start	Dec 28, 2018	[1] derived	Likely	2026-02-04	Shown
First operational	May 24, 2024	[1] derived	Likely	2026-02-04	Shown

Sources

[1]
AI data centers (Frontier Data Centers Hub)
Epoch AI · retrieved 2026-10-12 · CC BY 4.0
[2]
Electric Retail Service Territories (HIFLD, from EIA-861)
DHS HIFLD / U.S. EIA (via Esri Living Atlas) · retrieved 2026-09-28 · Public domain
[3]
Annual energy estimate
Datacenter Source (this site)
[4]
Independent System Operators (HIFLD)
DHS HIFLD (via PNNL ArcGIS) · retrieved 2026-09-28 · Public domain
[5]
OpenStreetMap — features tagged telecom=data_center or building=data_center
OpenStreetMap contributors · retrieved 2026-10-12 · ODbL 1.0
[6]
ERCOT Generator Interconnection Status (GIS) Report
ERCOT · retrieved 2026-10-01 · Public
[7]
Electric Power Monthly, Table 5.6.A — Average price of electricity to ultimate customers by state (July 2026)
U.S. Energy Information Administration · retrieved 2026-10-12 · Public domain
[8]
Power Plants in the U.S. (EIA-860)
U.S. Energy Information Administration · retrieved 2026-10-12 · Public domain
[9]
TDLR for SAT40 (Building 2)
Texas Dept. of Licensing & Regulation
[10]
TDLR for a set of three long buildings, which includes the first building we believe is for AI (Building 1)
Texas Dept. of Licensing & Regulation

Record links

Epoch AI site profile ↗

Report an error / add a source

Something wrong or missing? Pick the field, give the correct value and a source link. Every report is reviewed before data changes; accepted corrections are listed publicly.

What kind of report?

Field

Correct / proposed value

Source link (required)

Details

You may contact me about this report

Sent to the maintainers' review queue; never published automatically. No email is stored unless you tick the box.

How to read this page

Every value is a claim from a cited source. When sources disagree, the most trustworthy claim is shown and the others are listed beneath it.

Confirmed primary source · Likely reputable secondary or modeled · Unverified inferred · Speculative weak evidence.

Evidence level: ConfirmedBacked by a filing, deed, permit, interconnection-queue record, or a government or utility record. filing, deed, permit or grid recordAnnouncedStated by the company or reported in the press; not yet backed by a filing or grid record. company or press claimEst.Modeled, measured from satellite imagery, inferred from community mapping, or computed by this site. Not a disclosed figure. satellite, model or map inferenceHow levels are assigned

derived computed by our pipeline; estimated a model estimate, not a disclosed figure. Methodology →