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eStruxture CAL-3

CAL-3 is under construction at 200 High Plains Common in Rocky View County. eStruxture describes a completed design with 90 MW of total power, including 70 MW for computing equipment, and names CoreWeave as its first-phase anchor tenant. The County has issued development and building permits. A separate application to the Alberta Utilities Commission (AUC) covers 21 diesel backup generators. eStruxture says it installed them before submitting the required application, but had not tested or operated them as of August 28, 2026.

eStruxture Data Centers
How to read this profilePublic recordProponent statementProponent projectionProponent projectionA forecast, target, estimate, or promised future outcome from the company proposing the project.The label identifies whose projection it is. It does not turn a future claim into an independently verified result or an enforceable approval condition.Learn more →ADCW context

Project facts

Core scale, approval, employment, and schedule information, labelled by the type of evidence available.

Proponent statement

Total facility power

90 MW

The current data sheet's total-power rating for the completed design, not measured demand.

Sources [7]
Proponent statement

Power for computing equipment

70 MW

This is the computing portion of the 90 MW total facility rating, not another 70 MW on top of it.

Sources [7]
Proponent statement

Phase 1 building

205,000 sq. ft.

The company data sheet lists six data halls with 51,750 square feet of space for computing equipment on a 12.6-acre site.

Sources [7]
ADCW context

Announced investment

More than CA$750 million

eStruxture's CAL-3 full-build estimate, also listed as CA$750 million by Alberta Major Projects. A later company statement describes more than CA$1 billion invested across Alberta's digital infrastructure more broadly, not a revised CAL-3-only cost.

Sources [9], [10], [8]
Proponent statement

Anchor tenant

CoreWeave

CoreWeave committed to an undisclosed portion of Phase 1 capacity for AI cloud infrastructure. eStruxture does not publish the tenant's contracted MW.

Sources [8]
Proponent statement

Phase 1 availability

Sold out

An operator claim. The remaining tenants, contracted capacity, and workload mix have not been disclosed.

Sources [6]
Public record

Municipal approval

PRDP20251314

Rocky View County's June 17, 2025 notice lists the data centre tenancy at 200 High Plains Common and an appeal deadline of July 8, 2025.

Sources [11]
Public record

AUC proceedingAUC proceedingA proceeding is the Alberta Utilities Commission's formal record for reviewing an application, including evidence, submissions, and a decision when issued.A proceeding number helps locate the record. The existence of a proceeding does not mean the application has been approved.Learn more →

31020

An application for 21 diesel emergency standby generators with 66.75 MW of total nameplate capacity. The filing is not an approval or operating authorization.

Sources [12]
Proponent projection

Target opening

Fall 2026

eStruxture's target depends on testing and bringing systems into service, permission to occupy the building, utility readiness, and customers moving in. An opening date has not been confirmed.

Sources [5], [8]

Energy and emissions

eStruxture plans 90 MW of total facility power, including 70 MW for computing equipment. These are design ratings. Actual electricity use will depend on how much of the facility is operating.

Important distinction: The first 45 MW of data-centre load would be served by three FortisAlberta distribution lines. Diesel generators would provide backup during outages. Their combined 66.75 MW rating includes spare capacity for reliability and is counted separately from data-centre demand.
Proponent statement

Utility service

Multiple FortisAlberta lines

The data sheet identifies multiple 15 MW utility lines serving dedicated electrical lineups and lists Fortis as the power provider.

Sources [7]
Proponent statement

Rack density

Up to 125 kW+ per cabinet

A maximum design capability for selected deployments, not the average density of every rack.

Sources [7], [5]
Proponent statement

Diesel backup powerBackup generationBackup generators provide electricity when the normal supply is unavailable. They may also run for testing or maintenance.Installed capacity does not establish continuous operation, annual fuel use, or emissions. Operating hours and permit conditions are separate evidence.Learn more →

21 generators / 66.75 MW

The application covers twenty 3.25 MW units and one 1.75 MW unit for life-safety systems. Up to 19 would run together during an outage. Their combined rated capacity includes redundancy and is separate from the data centre's electricity demand.

Sources [12]
Proponent statement

Generators installed before filing

AUC application submitted afterwards

eStruxture says it missed the AUC approval requirement because of an administrative oversight. It had already bought and installed the generators when it applied. The company said they had not been tested or operated as of August 28, 2026.

Sources [12]
Proponent statement

Generator testing

Monthly, one unit at a time

eStruxture proposes daytime tests of up to 30 minutes per generator. Its submitted policy prefers weekdays from 9 a.m. to 4 p.m., excluding statutory holidays. The policy is still marked for approval and leaves minimum test duration and load blank.

Sources [12], [2]
ADCW context

Reliability design

Tier III designed

The design aims to allow maintenance without interrupting service. eStruxture lists Uptime Institute Tier III by Design as a planned certification; ADCW has not confirmed that certification has been issued.

Sources [7], [5]
Proponent projection

Diesel use and carbon emissions

11,920 L/hour and 32 tonnes CO₂/hour

These are eStruxture's estimates for 19 generators running at the loads listed in its filing. They show the scale of that backup-power scenario. Actual fuel use and annual emissions will depend on how often, how long, and at what load the generators run; those totals are not published.

Sources [3]
Proponent projection

Other diesel emissions

Hourly estimates for 19 generators

The same scenario estimates 310 kg of nitrogen oxides and non-methane hydrocarbons combined, 170 kg of carbon monoxide, 9.7 kg of particulate matter, and 0.30 kg of sulphur dioxide per hour. These are amounts released by the generators. They do not show what people would breathe at nearby homes.

Sources [3]

Water

The permit requires connections to High Plains Industrial Park's drinking-water and wastewater systems. It identifies 2,560 L/day of water capacity for the property, with more to be purchased if needed. Actual use and cooling-water needs are not published. The cooling design combines air cooling with liquid delivered directly to computer chips. [7], [18], [1]

Public record

Water and wastewater connections

2,560 L/day allocated to the property

The permit requires water and wastewater demand calculations, connections to High Plains Industrial Park systems, and purchase of extra water capacity if needed. The allocation shows existing capacity assigned to the property. It does not tell us how much water CAL-3 will actually use or need for cooling.

Sources [1]
Proponent statement

Cooling design

Closed-loopClosed-loop coolingCooling fluid circulates repeatedly through a contained loop instead of being routinely discharged after one pass.That describes the loop, not the whole site's water use. A separate heat-rejection system can still use water, and filling, maintenance, and leaks also matter.Learn more → air and liquid coolingLiquid coolingLiquid carries heat away from computing equipment, for example through cold plates at the chips.This describes how heat leaves the equipment. It does not identify how heat is ultimately released outside, or establish the site's water demand.Learn more →

CAL-3 combines air cooling with direct-to-chip liquid cooling. The mix varies by deployment density.

Sources [7]
ADCW context

Cooling-water needs

Volumes not published

Closed-loop cooling circulates fluid through the system, but CAL-3's initial fill and ongoing top-up needs are not disclosed. eStruxture says it has moved away from public water for cooling. The site still has water-servicing requirements, and actual use, wastewater, and dischargeWithdrawal, consumption, and dischargeWithdrawal is water taken from a source. Consumption is the portion not returned to the same water system. Discharge is water released after use or treatment.These are different quantities. Check which one a water figure describes before comparing projects.Learn more → volumes remain unknown.

Sources [1], [7], [18]

Noise

Project-specific noise evidence is shown when it is available. A predicted sound level is not a measurement from an operating facility.

Proponent projection

Sound during normal operation

43–45 dBA at four nearby locations

The March 20, 2025 study predicts these levels with the generators off and sound barriers in place. It assessed an earlier design with two buildings and 144 chillers. These are predictions, not measurements of the completed facility.

Sources [4]
ADCW context

Sound during generator testing

47–53 dBA during the day

The study describes testing one generator at a time, although its equipment list also mentions ten per phase. It does not show how loud an outage would be with several generators running together. eStruxture claims the smaller fleet would reduce generator sound by about 5.35 dB, but supplies no updated predictions at nearby locations.

Sources [4], [12]

Indigenous context

Data centre projects sit within treaty territories and places with longstanding First Nations and Métis connections. This section brings together the public record on treaty geography, Indigenous ownership, consultation, and community concerns. Treaty boundaries alone cannot tell us which communities may be affected or how they view a project.

ADCW context

Treaty geography

Treaty 7 territory

The federal historical treaty-boundary dataset places the project area within Treaty 7. This is geographic context and does not establish project-specific consultation, effects, or community positions.

Sources [19]
Proponent statement

Application notification

Seven First Nations notified

The applicant says it notified Kainai, Piikani, Siksika, Tsuut'ina, and the Bearspaw, Chiniki, and Goodstoney Nations. It reported no questions or comments by August 28, 2026. This is the applicant's participation record, not evidence of consent or an AUC finding on consultation.

Sources [12]

Approval and public process

County permits allow the development to proceed, subject to their conditions. The diesel backup generators need a separate AUC approval. eStruxture says it installed them before applying. Completion of permit conditions, permission to occupy the building, and the start of commercial service remain unconfirmed.

Public record

Development permitDevelopment permitA municipality's approval allows a specified use or development on a particular site, subject to its land-use rules and any conditions.Separate provincial or utility approvals may still be needed. A permit does not establish that construction has begun or that the facility is operating.Learn more → issued

October 17, 2025

The issued permit covers the same property and data centre tenancy as the June 17, 2025 public notice. The documents do not explain the gap between the dates or confirm that all permit conditions have been met.

Sources [1], [11]
Public record

Development approval

PRDP20251314

The County's approved-permit notice covers an office and warehouse building accommodating a data centre at Lot 12, Block 7, Plan 2410651; NE 12-26-29-W4M.

Sources [11]
ADCW context

Public notice and appeal

Appeal deadline July 8, 2025

The reviewed County search did not identify a later appeal decision. Subsequent building permits and construction records show the project continued.

Sources [11], [13], [14]
Public record

New-construction permit

PRBD20255100

The November 2025 County report lists 27,263 m² and an estimated construction value of CA$24.0 million at the CAL-3 address. This permit value is not the project's full capital cost.

Sources [13]
Public record

Alteration permit

PRBD20258056

The April 2026 County report lists 4,020 m² and an estimated construction value of CA$5.15 million at the same address. It should not be added to company investment claims without a complete cost reconciliation.

Sources [14]
ADCW context

County sector research

Report received for information

The County's commissioned report considers infrastructure capacity, agricultural land, water, energy, and municipal policy at a sector level. Council received it on September 22, 2026. It is not a site-specific assessment, adopted policy, or a change to CAL-3's existing permits.

Sources [15], [16]
Public record

County policy context

CAL-3 recognized as an East Balzac development

Rocky View County publicly identified CAL-2 and CAL-3 while describing its broader approach to responsible AI data centre development.

Sources [17]
ADCW context

Standby-generator application

AUC decision pending

Proceeding 31020 requests approval for the already-installed emergency standby generators. The application asked for a decision by September 29, 2026; that is the applicant's requested date, not a regulator deadline or approval.

Sources [12]
Proponent statement

Participant involvement

No unresolved concerns reported by applicant

The participation program used a 2 km notification radius and 800 m consultation radius. One landowner asked about noise and later reported no concerns. Rocky View County said it had not independently verified the technical, environmental, fuel, emissions, noise, safety, or emergency-response information.

Sources [12]
Proponent statement

Backup power during an outage

Several generators may run overnight

The submitted policy allows generators to run together, at high load, for as long as needed during a loss of utility power, including overnight. The weekday testing schedule does not limit that emergency response. The policy is marked for approval, so these provisions are not confirmed AUC approval conditions.

Sources [2]
ADCW context

Air quality at nearby homes

Supporting results not included

eStruxture says the generators would meet Alberta's nitrogen dioxide air-quality objectives. The supplied attachment lists hourly emissions, but does not show how pollutants would spread or their predicted concentrations near the ground. It therefore does not provide the results needed to assess that claim.

Sources [12], [3]
ADCW context

Has the facility opened?

Not yet confirmed

The launch event and tenant announcement do not confirm that testing is complete, occupancy permission has been granted, or customers are operating at the site.

Sources [5], [8]

Timeline

Observed decisions and future dates are kept distinct; projected milestones may change.

  1. Proponent statement

    eStruxture announced CAL-3 as a 90 MW project with more than CA$750 million planned for the full build and a second-half 2026 target. [9]

  2. Public record

    Rocky View County published the approved development-permit notice for PRDP20251314 at 200 High Plains Common. [11]

  3. Public record

    The attached municipal development permit PRDP20251314 was issued with water, wastewater, and other servicing conditions. [1]

  4. Public record

    The County recorded new-construction Building Permit PRBD20255100 at the CAL-3 address. [13]

  5. Public record

    The County recorded alteration Building Permit PRBD20258056 at the same address. [14]

  6. Proponent statement

    eStruxture announced CoreWeave as the Phase 1 anchor tenant and retained a second-half 2026 service target. [8]

  7. Proponent statement

    eStruxture filed Proceeding 31020 for 21 diesel emergency standby generators. It disclosed that the units had already been procured and installed, but said no testing or operation had occurred. [12]

  8. Proponent projection

    Applicant's target for the first 15 MW of Phase 1 data-centre load. This is not a confirmed in-service date. [12]

  9. Proponent projection

    Applicant's target for 30 MW cumulative Phase 1 load. This remains subject to approvals and commissioning. [12]

  10. Proponent projection

    Applicant's target for the full 45 MW Phase 1 load described in the standby-generator filing. [12]

What we still don't know

Some details have not been made public or remain unresolved. We keep those gaps visible and update them when reliable information becomes available.

  • Whether commissioning is complete, occupancy permission has been granted, and commercial service has begun.
  • How much electricity CAL-3 actually uses over a day or year, and the details of its utility contract and electricity supply mix.
  • How much capacity CoreWeave has contracted, who the other customers are, and what workloads they will run.
  • The AUC decision and any conditions on testing or operating the backup generators.
  • How often and how long the generators will run, their annual emissions, and predicted air quality at nearby locations.
  • Whether the four extra unallocated generators listed in the operating policy are intended for this application or a later stage.
  • How loud the final design would be at nearby homes, particularly when several generators run together during an outage.
  • How much water is needed to fill and top up the cooling system, total site water use, and wastewater and discharge volumes.
  • Expected electricity and water efficiency, measured performance, and whether waste heat will be reused.
  • Whether planned Tier III and other certifications have been issued.
  • How the full-project investment estimate relates to the separate building-permit values and the company's broader Alberta investment.
  • Construction and permanent job numbers, local spending, tax revenue, and any binding community-benefit commitments.
  • Any First Nations engagement after the applicant's August 28, 2026 notification record, including concerns and measures to address them.

Source record

Primary and official sources reviewed for this profile. Company disclosures support what the company said, not independent verification of future outcomes.

  1. Proceeding 31020, X0001: development and building permits

    Rocky View County, filed with the Alberta Utilities Commission · Municipal record · Filed 2026-08-28

  2. Proceeding 31020, X0009: submitted standby generator operating policy

    eStruxture Data Centers, filed with the Alberta Utilities Commission · Regulatory filing · Filed 2026-08-28

  3. Proceeding 31020, X0010: standby generator hourly emissions

    eStruxture Data Centers, filed with the Alberta Utilities Commission · Regulatory filing · Filed 2026-08-28

  4. Proceeding 31020, X0013: March 20, 2025 sound assessment

    eStruxture Data Centers, filed with the Alberta Utilities Commission · Regulatory filing · Filed 2026-08-28

  5. CAL-3 data centre

    eStruxture Data Centers · Company disclosure · Accessed 2026-08-27

  6. Calgary data centres

    eStruxture Data Centers · Company disclosure · Accessed 2026-08-27

  7. CAL-3 data sheet

    eStruxture Data Centers · Company disclosure · Accessed 2026-08-27

  8. CoreWeave announced as CAL-3 anchor tenant

    eStruxture Data Centers · Company disclosure · 2026-05-14

  9. CAL-3 investment announcement

    eStruxture Data Centers · Company disclosure · 2024-10-29

  10. eStruxture CAL-3 Data Centre

    Government of Alberta Major Projects · Government database · Accessed 2026-08-27

  11. Approved development permits: June 17, 2025

    Rocky View County · Municipal record · 2025-06-17

  13. November 2025 major construction permits

    Rocky View County · Municipal record · 2025-12-04

  14. April 2026 major construction permits

    Rocky View County · Municipal record · 2026-05-05

  15. Emerging Sector Strategy: Data Centre Technology, Impacts, and Municipal Policy Considerations

    EXP Services and Urbanics for Rocky View County · Municipal record · 2026-08-14

  16. Council Decisions: September 22, 2026

    Rocky View County · Municipal record · 2026-09-23

  17. Responsible AI data centre development

    Rocky View County · Municipal record · 2025-09-18

  18. The New Homesteaders of the Digital West

    eStruxture Data Centers · Company disclosure · 2026-05-07

  19. Treaty Boundary dataset

    Government of Canada Open Government Portal · Government database · Modified 2026-06-29