Resolution
Independent Electricity System Operator; Statistics CanadaclimateMaintained recordCurrent
Ontario's public connection register: what the IESO's Application Status list states about large proposed loads, counted from the register's own fields — and why its sizes cannot be totalled
The IESO's public connection register (the Application Status list's own backing feed): every record's applicant, project name, type, stated size, proposed in-service date, assessment status, posted-report links and committed flag, at the issuer's stated list vintage of 2026-07-10 — plus the register's large-load population counted under a stated rule (load-class application types, size stated in megawatts, at or above the IESO's own 75 MW large-load threshold). Also carried here: the two Statistics Canada monthly Ontario electricity-generation series (tables 25-10-0015-01 and 25-10-0016-01) whose published Ontario values are identical at every shared reference month — a source fact any reader pairing the two tables as independent measurements needs. Maintained September 6, 2026: August 14 register state and a July-to-August comparison are appended; first-reading values remain bound to July 10. Maintained September 29, 2026: the September 10 list is appended as cycle three. Earlier engineering assessments retain their original dates and are not requalified by a register refresh.
A Resolution record follows one institution's figures for a defined quantity. It may contain projections, estimates or measured observations. Each version held here keeps its publication date and source, so a newer figure does not erase the earlier one. What is a Resolution record? →
Maintained record. This page preserves successive versions of an official record. It makes no projection and awaits no forecast verdict. Revisions remain visible, and provisional figures retain that status.
The lineage
| Vintage | Issuer | Published | Position | Source |
|---|---|---|---|---|
| register list vintage 2026-07-10, captured 2026-08-03 | Independent Electricity System Operator | 2026-07-10 | superseded | Source → · accessed 2026-08-03 |
| page statement 'Last Updated: July 10, 2026', captured 2026-08-03 | Independent Electricity System Operator | 2026-07-10 | current | Source → · accessed 2026-08-03 |
| WDS response of 2026-08-03; latest reference month 2026-05 | Statistics Canada | 2026-08-03 | superseded | Source → · accessed 2026-08-03 |
| WDS response of 2026-08-03; latest reference month 2026-05 | Statistics Canada | 2026-08-03 | superseded | Source → · accessed 2026-08-03 |
| Final Report of 2025-09-19, captured 2026-08-03 | Independent Electricity System Operator | 2025-09-19 | current | Source → · accessed 2026-08-03 |
| Internet Archive capture of the issuer's feed, timestamped 2026-06-01; 2,032 records | Independent Electricity System Operator (register); Internet Archive (capture) | 2026-06-01 | superseded | Source → · accessed 2026-08-04 |
| captured 2026-08-04 | Independent Electricity System Operator | 2026-08-04 | current | Source → · accessed 2026-08-04 |
| register list vintage 2026-08-14, captured 2026-09-02 | Independent Electricity System Operator | 2026-08-14 | superseded | Source → · accessed 2026-09-02 |
| page statement Last Updated August 14, 2026, captured September 2 | Independent Electricity System Operator | 2026-08-14 | superseded | Source → · accessed 2026-09-02 |
| Register list vintage September 10, 2026; captured September 29, 2026 | Independent Electricity System Operator | 2026-09-10 | current | Source → · accessed 2026-09-29 |
| Register list vintage September 10, 2026; captured September 29, 2026 | Independent Electricity System Operator | 2026-09-10 | current | Source → · accessed 2026-09-29 |
| July 2026 endpoint; released and captured September 29, 2026 | Statistics Canada | 2026-09-29 | current | Source → · accessed 2026-09-29 |
| July 2026 endpoint; released and captured September 29, 2026 | Statistics Canada | 2026-09-29 | current | Source → · accessed 2026-09-29 |
Copyright © 2004-2022 Independent Electricity System Operator, all rights reserved. This information is subject to the Terms of Use set out in the IESO’s website (www.ieso.ca)
| Vintage | Period | Value | Role | Assurance | Basis |
|---|---|---|---|---|---|
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — every record in the feed | 2,044.0 records | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — load-class applications with a stated Size of at least 75 MW | 67.0 applications | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — population members whose assessment status reads Complete | 35.0 applications | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — population members whose assessment status reads Active | 22.0 applications | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — population members whose assessment status reads On-Hold | 5.0 applications | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — population members whose assessment status reads Withdrawn | 5.0 applications | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — population members carrying at least one posted assessment-report link | 20.0 applications | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — population members carrying no posted assessment report | 47.0 applications | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — load-class records excluded from the population because their Size is stated only in megavolt-amperes (at or above 75 MVA) | 15.0 applications | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — population members whose proposed in-service field already reads In-Service | 8.0 applications | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — the largest Active application (CAA 2025-833), no posted assessment | 707.0 MW | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — the second-largest Active application (CAA 2025-848), no posted assessment | 695.0 MW | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — the third-largest Active application (CAA 2025-863), no posted assessment | 550.0 MW | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — the fourth-largest Active application (CAA 2024-810), no posted assessment | 453.0 MW | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — the withdrawn Honda Alliston connection application (CAA 2024-802), applicant of record Hydro One Networks Inc. | 431.0 MW | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — the Centennial TS register row's stated Size (CAA 2023-766) | 420.0 MW | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — the Dofasco decarbonization application's stated Size (CAA 2021-712), On-Hold, no posted assessment | 280.0 MW | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — distinct Applicant field spellings across the full register | 432.0 distinct applicant strings | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register list vintage 2026-07-10 — groups of applicant spellings that collapse together under a stated normalization | 25.0 spelling groups | institutional estimate | — | — |
| Final Report of 2025-09-19, captured 2026-08-03 | Final connection assessment of 2025-09-19 — the assessed station maximum load for Centennial TS (CAA 2023-766) | 331.2 MW | institutional estimate | — | — |
| WDS response of 2026-08-03; latest reference month 2026-05 | Table 25-10-0015-01, Ontario monthly generation — published reference months at the 2026-08-03 response | 221.0 reference months | institutional estimate | — | — |
| WDS response of 2026-08-03; latest reference month 2026-05 | Table 25-10-0016-01, Ontario monthly generation — published reference months at the 2026-08-03 response | 221.0 reference months | institutional estimate | — | — |
| Internet Archive capture of the issuer's feed, timestamped 2026-06-01; 2,032 records | Register vintage of 2026-06-01 (web archive) — the Honda Alliston application, then recorded Active | 431.0 MW | institutional estimate | — | — |
| Internet Archive capture of the issuer's feed, timestamped 2026-06-01; 2,032 records | Register vintage of 2026-06-01 (web archive) — a second Alliston application, then recorded Complete | 24.0 MW | institutional estimate | — | — |
| register list vintage 2026-07-10, captured 2026-08-03 | Register vintage of 2026-07-10 — the second Alliston application, now recorded Withdrawn, its assessment still posted | 24.0 MW | institutional estimate | — | — |
| register list vintage 2026-08-14, captured 2026-09-02 | August 14, 2026 list vintage — records | 2,062.0 records | institutional estimate | — | — |
| register list vintage 2026-08-14, captured 2026-09-02 | August 14, 2026 list vintage — population | 71.0 applications | institutional estimate | — | — |
| register list vintage 2026-08-14, captured 2026-09-02 | Whole-register July 10 to August 14 change — withdrawals | 6.0 status transitions | institutional estimate | — | — |
| register list vintage 2026-08-14, captured 2026-09-02 | Whole-register July 10 to August 14 change — completions | 4.0 status transitions | institutional estimate | — | — |
| register list vintage 2026-08-14, captured 2026-09-02 | Whole-register July 10 to August 14 change — reversals | 3.0 status transitions | institutional estimate | — | — |
| Register list vintage September 10, 2026; captured September 29, 2026 | September 10, 2026 register list - records | 2,074.0 records | institutional estimate | — | — |
| Register list vintage September 10, 2026; captured September 29, 2026 | September 10, 2026 register list - population | 75.0 applications | institutional estimate | — | — |
| Register list vintage September 10, 2026; captured September 29, 2026 | September 10, 2026 register list - withdrawals | 1.0 status transitions | institutional estimate | — | — |
| Register list vintage September 10, 2026; captured September 29, 2026 | September 10, 2026 register list - completions | 3.0 status transitions | institutional estimate | — | — |
| Register list vintage September 10, 2026; captured September 29, 2026 | September 10, 2026 register list — Part 1 SIA Comp to Complete status changes | 11.0 status transitions | institutional estimate | — | — |
| Register list vintage September 10, 2026; captured September 29, 2026 | September 10, 2026 register list - posted | 20.0 applications | institutional estimate | — | — |
| Register list vintage September 10, 2026; captured September 29, 2026 | September 10, 2026 register list - unposted | 55.0 applications | institutional estimate | — | — |
| July 2026 endpoint; released and captured September 29, 2026 | Ontario total generation: January 2008 through July 2026 | 223.0 reference months | institutional estimate | — | — |
| July 2026 endpoint; released and captured September 29, 2026 | Ontario total generation: January 2008 through July 2026 | 223.0 reference months | institutional estimate | — | — |
| Register list vintage September 10, 2026; captured September 29, 2026 | Corrected September comparison: added report URLs across all register rows | 4.0 report URLs | institutional estimate | — | — |
Movement between vintages
This record shows what an institution published and how its figures compare across versions or with later outcomes. It does not rank institutions or grade their forecasting ability.
| Comparison | Compared vintages | Movement | Basis |
|---|---|---|---|
| One project, two issuer surfaces: the Centennial TS register row against its own final connection assessment | register list vintage 2026-07-10, captured 2026-08-03 (institutional estimate 420.0 MW) vs. Final Report of 2025-09-19, captured 2026-08-03 (institutional estimate 331.2 MW) | not comparable — The register's Size basis is unstated: holding 420 against the assessed 331.2 as a numeric difference would assert a shared basis no issuer document establishes. The unreconciled divergence between two surfaces of the same issuer is itself the finding this comparison records. | same issuer |
| Tables 25-10-0015-01 and 25-10-0016-01 — the two published monthly Ontario generation series, all shared reference months | July 2026 endpoint; released and captured September 29, 2026 (institutional estimate 223.0 reference months) vs. July 2026 endpoint; released and captured September 29, 2026 (institutional estimate 223.0 reference months) | +0.0 reference months | same issuer |
| Two Alliston connection applications, one vintage apart: Active and Complete, then both Withdrawn | Internet Archive capture of the issuer's feed, timestamped 2026-06-01; 2,032 records (institutional estimate 431.0 MW) vs. register list vintage 2026-07-10, captured 2026-08-03 (institutional estimate 431.0 MW) | not comparable — Both sides state the same quantity. What changed is the application's recorded state, which is not a numeric difference; reporting a difference of zero would conceal the only thing that moved. | same issuer |
| Tables 25-10-0015-01 and 25-10-0016-01 — the two published monthly Ontario generation series, all shared reference months | WDS response of 2026-08-03; latest reference month 2026-05 (institutional estimate 221.0 reference months) vs. WDS response of 2026-08-03; latest reference month 2026-05 (institutional estimate 221.0 reference months) | +0.0 reference months | same issuer |
Evidence qualifications (9)
- The register's Size field has no issuer-stated definition; it records an application's own stated quantity, which is sometimes an increment and sometimes not. No sum of Size values is meaningful, and none is published here.
- The population rule (load-class, megawatt-stated, at least 75 MW) is Countability's stated counting rule over the issuer's own fields — the issuer publishes no such population. Changing the rule would change the counts; the rule is therefore stated with the counts, here and on the Brief, and the archived register makes every count checkable.
- One register vintage shows states, not transitions. What entered, left, or changed status becomes observable only when a later vintage is captured; the issuer overwrites the register in place and publishes no history.
- Applicants of record are frequently transmitters or distributors, not the businesses whose projects the register rows name. Nothing here attributes an application's quantity, or its withdrawal, to the named project's proponent.
- The 431 MW Honda Alliston row is reported exactly as the register states it, including the issuer's own unreconciled Withdrawn/Committed contradiction. Why it was withdrawn, and what it implies for the project, is not in the public record.
- A prior register vintage used here comes from the Internet Archive's capture of the issuer's own feed, not from a Countability capture. It is cited as what the issuer served on that date, with the archive named as the source of the copy.
- In the preserved July 10 list, both withdrawn Alliston rows read Committed 'Yes'. The issuer's own Connection Process FAQ states the 'Yes' is removed when a project is placed in service, and that the 'same will be done for projects that have been “withdrawn” by their connection applicants'. Four of the register's 2,044 rows carry Withdrawn together with Committed 'Yes'; two of those four are these Alliston applications.
- The September 10 register removes the Committed Yes flags and proposed dates on both withdrawn Alliston rows. This is a field update, not evidence of why either application was withdrawn. New posted engineering references remain unresolved in this register-only cycle; prior engineering conclusions remain dated to the documents actually assessed.
- September 30 correction and engineering follow-up: the whole-register comparison has four added report URLs, not the previously stated three, plus one removed URL. The earlier register-only qualification limitation remains a dated account of that reading. All four added reports and the removed reference have now been reviewed in the companion assessment Resolution; current validity and energization are not inferred.
Latest source: Ontario's public connection register: what the IESO's Application Status list states about large proposed loads, counted from the register's own fields — and why its sizes cannot be totalled · accessed 2026-09-29
Related on this site
- Brief: Claims on the grid: what Ontario's connection record proves about its largest new loads — and why the register they sit in cannot be added up →
- Receipt: Evidence summary for Claims on the grid: what Ontario's connection record proves about its largest new loads — and why the register they sit in cannot be added up →
- Domain: Climate →
- More Resolution lineages →
- Sources & Method →
This record shows what an institution published and how its figures compare across versions or with later outcomes. It does not rank institutions or grade their forecasting ability.
This is the current public record for this lineage. See Work with Countability for a commissioned projection-resolution question.
Work with Countability