Queue movement · 20 editions
What the Alberta queue did across 20 editions
AESO replaces its list every month, so each edition reads as a snapshot. Held against each other, 20 editions show what a single one cannot.
November 2025
18.1 GW had an in-service date. One month later, 1.4 GW did.
Between the October and November 2025 editions, AESO moved 23 data centre projects from Active to ISD Under Review and their in-service dates came off the list. The queue grew in the same month, from 32 entries to 38, and no reference left the list at all. Nothing was cancelled out of the fall: the projects stayed, the dates went.
Confirmed against AESO's own status column, not inferred from blank dates: "Active" fell from 30 entries to 7 and "ISD Under Review" rose from 2 to 29, while every megawatt column continued to parse normally.
Queue capacity, and how much of it has a date
What slipped
11 entries have had an in-service date move later. Cumulative slip across them is 4,940 days, 13.5 years. Median 416 days.
| Ref | MW | Slip | Moved to |
|---|---|---|---|
| P3109 | 1,200 | 24 mo | no date |
| P3075 | 45 | 23 mo | 2026-08-01 |
| P2953 | 75 | 21 mo | 2027-03-26 |
| P3102 | 950 | 20 mo | no date |
| P3126 | 5 | 19 mo | 2027-12-10 |
| P3157 | 75 | 14 mo | 2028-11-20 |
| P3078 | 75 | 12 mo | 2029-01-15 |
| P3079 | 75 | 9 mo | 2027-09-01 |
| P3101 | 950 | 8 mo | no date |
| P3141 | 0 | 8 mo | 2027-08-06 |
| P2952 | 75 | 4 mo | 2027-03-26 |
What left
7 references have disappeared from the list entirely, 3.9 GW between them. All seven were flagged Recently Cancelled by AESO in their final appearance before dropping off the list.
| Ref | MW | Last seen |
|---|---|---|
| P3124 | 1,000 | 2026-01 |
| P3129 | 932 | 2026-01 |
| P3146 | 800 | 2026-06 |
| P3164 | 800 | 2026-06 |
| P2919 | 200 | 2025-06 |
| P2615 | 75 | 2025-01 |
| P2883 | 55 | 2025-04 |
How this is compiled
AESO hosts every edition at a stable address but never presents them as a series. Each one from 2025-01 to 2026-08 is read from the operator's own file and compared entry by entry. Growth, withdrawals and date changes are differences between consecutive editions, not estimates.