| Alberta Electric System Operator | |
| Long Range Significant Transmission Outages for the period of 24 months starting 2026-03-07 | |
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The table below contains the significant transmission outages submitted as tentative to the AESO. These Outages have not yet necessarily been approved, but are listed for awareness and coordination purposes. An Outage has been considered significant for this table if it meets any one (1) or more of the following criteria: |
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| Note: Where a transmission outage requires generation curtailments, the adjustments to generation will typically happen in the hours before the scheduled transmission outage and in the hour after the element is returned to service. | |
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| Owner | From | To | Duration | Element | Scheduled Activity | Affected Intertie |
|---|---|---|---|---|---|---|
| EPCOR | 25-Jul-25 17:01 | 17-Apr-26 17:00 | 266 Days
Continuous |
T2 (EP Riverview) | bushing test failure (found during OE110184) | |
| SUNCOR | 04-Jan-26 08:00 | 02-Sep-26 16:00 | 241.29 Days
Continuous |
29EDD-34 260kV Bus 29PP-45 (29EDD-34), 29EDD-34 29-952-113 (29EDD-34) | urgent repairs on 29PT-224 at 29EDD34 on 29PP-45 bus | |
| EPCOR | 23-Feb-26 07:00 | 23-Mar-26 07:00 | 27.96 Days
Continuous |
805s T3 (805s Jasper) | bushing change | |
| Syncrude | 24-Feb-26 08:00 | 10-Mar-26 16:00 | 14.29 Days
Continuous |
11 (Aurora), 12 (Aurora), 13 (Aurora), T3 (Aurora), UT1 (Aurora), 11A (Aurora), 11B (Aurora), 12A (Aurora), 12B (Aurora), 13A (Aurora), 13B (Aurora), 89-15 (Aurora), 89-16 (Aurora), G20 (Aurora) | zone 6, 6 year PM | |
| ALTALINK | 03-Mar-26 08:00 | 09-Mar-26 17:00 | 6.33 Days
Continuous |
132s 51 (132s Ware Junction), 132s 47 (132s Ware Junction), 275s 5 (275s Jenner), 275s 2 (275s Jenner), 944L (132s Ware Junction - 275s Jenner) | replace line relays at 132s Ware Junction, replace relay comm cards and update settings on protections at 275s Jenner,
implement third 944AL terminal, new 1080s Raptor line protection relays, 1080s Raptor and 944AL tap addition, close Open Point 'A' |
|
| ATCO | 05-Mar-26 07:00 | 08-Mar-26 16:00 | 3.33 Days
Continuous |
732s 9L913D1 (732s Mitsue) | emergency, Changing white tag poles from Test & Treat ( Str 16,69 and 503 ) | |
| ALTALINK | 07-Mar-26 08:00 | 07-Mar-26 16:00 | 8 Hours
Continuous |
33s 2 (33s Spray) | maintenance | |
| ALTALINK | 08-Mar-26 07:00 | 08-Mar-26 18:00 | 11 Hours
Daily |
1072L (103s Goose Lake - 205s Castle Rock Ridge) | South Crew will be doing component replacement on 1072L15 | |
| ALTALINK, EPCOR | 09-Mar-26 07:00 | 10-Mar-26 17:00 | 1.42 Days
Continuous |
908L (89s Ellerslie - 816s Petrolia), 816s P2401 (816s Petrolia), 816s P2406 (816s Petrolia) | Petrolia: 908L Relay Maintenance | |
| EPCOR | 09-Mar-26 07:00 | 13-Mar-26 17:00 | 4.42 Days
Continuous |
987s GT3 (987s Clover Bar) | Repair | |
| ATCO | 10-Mar-26 08:00 | 10-Mar-26 17:00 | 9 Hours
Continuous |
7L63 (788s Hotchkiss - 7LA63 tap), 788s 703 (788s Hotchkiss) | emergency changing rotten cross arm str 86 and str 1115 | |
| ALTALINK | 10-Mar-26 09:00 | 10-Mar-26 17:00 | 8 Hours
Continuous |
310p 1752 (310p Sundance) | PRC5 Breaker Maintenance | |
| ATCO | 10-Mar-26 09:00 | 14-Apr-26 17:00 | 35.33 Days
Continuous |
972s 240kV Bus 900BS2 (972s Tinchebray) | Install Breakers 905/906, 905CT/906CT, switches 905A/906B On release leave Bkrs 905/906, 905A/905B, and 906A/906B closed as feed through (disable bkr trips), Bkr 903 still protecting 9L93, leave new 9L62D1 open for future line connection |
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| EPCOR | 11-Mar-26 07:00 | 11-Mar-26 17:00 | 10 Hours
Continuous |
557s CD2401 (557s Castle Downs) | Castledowns: CD2401 NAIT Student Substation Tour | |
| EPCOR | 11-Mar-26 07:00 | 13-Mar-26 17:00 | 2.42 Days
Continuous |
816s T2 (816s Petrolia), 816s P2404 (816s Petrolia), 816s P2405 (816s Petrolia) | Petrolia: TX2 Relay Maintenance | |
| ALTALINK | 11-Mar-26 09:30 | 11-Mar-26 16:00 | 6.5 Hours
Continuous |
310p 2052 (310p Sundance) | First Trip, PRC5 maint & 27 relay replacement | |
| ALTALINK | 11-Mar-26 11:00 | 11-Mar-26 12:30 | 90 Mins
Continuous |
347s 199W (347s AML Fox Creek) | 347s199W 138kV CB Low Gas top up. | |
| ENMAX, ALTALINK | 12-Mar-26 08:00 | 13-Mar-26 18:00 | 1.42 Days
Continuous |
7.82L (42s Sarcee - SS-7) | Replace connection point on shield wire weld tabs on structure | |
| ALTALINK, ENMAX | 12-Mar-26 08:30 | 13-Mar-26 18:00 | 1.4 Days
Continuous |
42s 7 (42s Sarcee), 7.82L (42s Sarcee - SS-7) | Replace connection point on shield wire weld tabs on structure | |
| ALTALINK | 12-Mar-26 09:30 | 12-Mar-26 16:00 | 6.5 Hours
Continuous |
310p 552 (310p Sundance) | First Trip & PRC5 Maint | |
| EPCOR | 14-Mar-26 07:00 | 29-Mar-26 17:00 | 15.42 Days
Continuous |
330p 1207 (330p Genesee), 330p 1204 (330p Genesee), 330p 1201 (330p Genesee), 330p 1210 (330p Genesee), 330p 1214 (330p Genesee), 330P 12TC1 (330p Genesee), 330p 500kV Bus 1 (330p Genesee), 330p 805 (330p Genesee) | Genesee: 500kV BUS 1, POW Project Installation | |
| EPCOR | 15-Mar-26 07:00 | 01-Apr-26 17:00 | 17.42 Days
Continuous |
330p 12GT6D (330p Genesee), 330p 1211 (330p Genesee), 330p 1210 (330p Genesee) | POW project installation | |
| EPCOR | 16-Mar-26 07:00 | 16-Mar-26 17:00 | 10 Hours
Continuous |
816s P2403 (816s Petrolia) | Petrolia: P2403 Relay Maintenance | |
| ALTALINK, EPCOR | 16-Mar-26 07:00 | 19-Mar-26 17:00 | 3.42 Days
Continuous |
1058L (657s Summerside - EP 803s Lambton), EP 803s L2403 (EP 803s Lambton), EP 803s L2404 (EP 803s Lambton), 657s SU2403 (657s Summerside), 657s SU2404 (657s Summerside) | 1058L: Lambton Surge Counter Install and Summerside SUDS10 Ice Shield Repair | |
| EPCOR | 16-Mar-26 07:00 | 20-Mar-26 17:00 | 4.42 Days
Continuous |
T2 (Poundmaker) | Poundmaker: TX2 Bladder and Sample Pipe Repair | |
| EPCOR | 16-Mar-26 07:00 | 20-Mar-26 17:00 | 4.42 Days
Continuous |
665s T2 (665s Dome) | Dome: TX2, Neutral Bar Move for Building Expansion (UGT) | |
| ALTALINK | 16-Mar-26 07:00 | 25-Mar-26 18:00 | 9.46 Days
Continuous |
87s 2352 (87s Gaetz), 87s 1652 (87s Gaetz), 87s T1 (87s Gaetz), 87s 240kV West Bus (87s Gaetz), 914L (63s Red Deer - 87s Gaetz) | Installing new 87s1752 & 87s1952. Closing Open Points 'F', 'G', 'H'. | |
| EPCOR | 16-Mar-26 07:00 | 01-Apr-26 17:00 | 16.42 Days
Continuous |
987s GT1 (987s Clover Bar) | maintenance | |
| ALTALINK | 16-Mar-26 07:15 | 19-Mar-26 17:45 | 3.44 Days
Continuous |
788L (898s Heart Lake - 788AL tap), 788L107A (788AL tap), 602L1 (602L tap) | component replacement on 788L (STR 157 - 218) | |
| ENMAX | 16-Mar-26 08:00 | 19-Mar-26 16:00 | 3.33 Days
Continuous |
162.2TR (SS-162) | Investigate tap changer oil leak. Oil Sampling MT, TC, Bushing. Relay Fault Pressure Test. Reversing Switch Check. Transformer Monitor Maintenance. Gas Monitor Maintenance. I&R Settings Issue on 162.2TR T60 | |
| ALTALINK | 16-Mar-26 08:00 | 19-Mar-26 16:00 | 3.33 Days
Continuous |
788L (898s Heart Lake - 788AL tap) | component replacement on 788L (STR 157 - 218) | |
| ALTALINK | 16-Mar-26 09:00 | 16-Mar-26 13:00 | 4 Hours
Continuous |
28s 47 (28s West Brooks), 28s 31 (28s West Brooks), 763L (28s West Brooks - 763AL tap) | South crew will be doing general maintenance . The conductor damper on the top left phase. Str 147 ahead position, has run out about twenty feet. | |
| BCH | 16-Mar-26 09:00 | 20-Mar-26 17:00 | 4.33 Days
Continuous |
5L92 (BCH Cranbrook - BCH Selkirk) | replace end of life spacers | AB-BC |
| ALTALINK, Lethbridge | 16-Mar-26 10:00 | 26-Mar-26 16:00 | 10.25 Days
Continuous |
618s 824 (618s Riverbend), 824L (593s Lakeview - 618s Riverbend) | City Of Lethbridge outage, Outage required to replace 593s1-Disconnect Switch and 593sPTL1-CVT. | |
| ALTALINK | 16-Mar-26 12:00 | 20-Mar-26 12:00 | 4 Days
Continuous |
163s 1752 (163s Amoco Empress), 163s 1552 (163s Amoco Empress), 1002L (163s Amoco Empress - 275s Jenner) | Urgent Protection change, salvage old over voltage protections and incorporate overvoltage and RAS into 1002L Line protections. | |
| ATCO | 17-Mar-26 09:00 | 17-Mar-26 11:00 | 2 Hours
Continuous |
7L93 (828s Sulphur Point - 930s Arcenciel) | Open end 7L93 at 930S to accommodate Telecom outage 1-00513974 | |
| ALTALINK | 17-Mar-26 09:30 | 17-Mar-26 11:30 | 2 Hours
Continuous |
108s 352 (108s Amelia) | PRC5 Breaker Maint & First Trip | |
| ALTALINK | 17-Mar-26 09:30 | 17-Mar-26 16:00 | 6.5 Hours
Continuous |
89s 2052 (89s Ellerslie) | PRC5 Maint & First Trip | |
| ALTALINK | 17-Mar-26 11:30 | 17-Mar-26 16:00 | 4.5 Hours
Continuous |
574s 652 (574s Nilrem) | PRC5 Maint & First Trip | |
| ALTALINK | 17-Mar-26 13:30 | 17-Mar-26 16:00 | 2.5 Hours
Continuous |
108s 452 (108s Amelia) | PRC5 Breaker Maint & First Trip | |
| ALTALINK | 18-Mar-26 08:00 | 19-Mar-26 17:00 | 1.38 Days
Continuous |
163s 1752 (163s Amoco Empress), 163s 1552 (163s Amoco Empress), 1002L (163s Amoco Empress - 275s Jenner) | South Crew will be doing component replacement on 1002L (STR 67-99) | |
| ALTALINK | 18-Mar-26 08:30 | 18-Mar-26 17:00 | 8.5 Hours
Continuous |
28s T1 (28s West Brooks) | 28sT1 Out of step alarm. | |
| ALTALINK | 18-Mar-26 09:00 | 18-Mar-26 11:30 | 2.5 Hours
Continuous |
574s 452 (574s Nilrem) | PRC5 Breaker Maint & First Trip | |
| ALTALINK | 18-Mar-26 09:30 | 18-Mar-26 16:00 | 6.5 Hours
Continuous |
108s 252 (108s Amelia) | PRC5 Breaker Maint & First Trip
Repair local/remote cutoff switch |
|
| ALTALINK | 18-Mar-26 10:00 | 18-Mar-26 16:00 | 6 Hours
Continuous |
13s 1552 (13s Deerland), 13s 98 (13s Deerland), 1054L (12s Heartland - 13s Deerland) | PRC5 Maint & First trip on 13s1552
13s98 Hot spot repair & switch adjustment |
|
| ALTALINK | 18-Mar-26 13:30 | 18-Mar-26 16:00 | 2.5 Hours
Continuous |
574s 552 (574s Nilrem) | PRC5 Breaker Maint | |
| ALTALINK | 19-Mar-26 08:00 | 28-Mar-26 16:00 | 9.33 Days
Continuous |
132s 51 (132s Ware Junction), 132s 55 (132s Ware Junction), 28s 5 (28s West Brooks), 28s 8 (28s West Brooks), 931L (28s West Brooks - 132s Ware Junction) | Urgent replacement of 28s 931L A - protection. | |
| ALTALINK | 20-Mar-26 07:00 | 20-Mar-26 18:00 | 11 Hours
Continuous |
908L (38s East Edmonton - 908AL tap), 908L (89s Ellerslie - 908AL tap) | 908LW/East Industrial: EDS2 Repair/Adjustment | |
| ATCO | 21-Mar-26 09:00 | 26-Mar-26 16:00 | 5.29 Days
Continuous |
7L89 (721s La Corey - 826s Marguerite Lake) | Replace 2 white tagged poles which failed test and trat inspection. 7L89 poles on structures 7L89/7L91-225 & 7L89/7L91-230 | |
| EPCOR | 23-Mar-26 07:00 | 27-Mar-26 17:00 | 4.42 Days
Continuous |
805s T3 (805s Jasper), EP 805s J2405 (EP 805s Jasper), EP 805s J2404 (EP 805s Jasper) | Jasper: TX3 Relay Maintenance and Scaffold Removal | |
| ALTALINK | 23-Mar-26 07:30 | 26-Mar-26 16:00 | 3.35 Days
Continuous |
AML 511s 1152 (AML 511s Crossings), AML 511s T30 (AML 511s Crossings) | Firmware upgrades on protections that are OOS, VCS Maintenance, Annual SVC+ maintenance | |
| ENMAX, ALTALINK | 23-Mar-26 08:00 | 23-Mar-26 12:00 | 4 Hours
Continuous |
28.80L (42s Sarcee - SS-28) | 1 sub Transmission line cut over. | |
| ENMAX | 23-Mar-26 08:00 | 26-Mar-26 18:00 | 3.42 Days
Continuous |
162.1TR (SS-162) | Investigate tap changer oil leak. Oil Sampling MT, TC, Bushing. Relay Fault Pressure Test. Reversing Switch Check. Transformer Monitor Maintenance. Gas Monitor Maintenance. I&R Settings Issue on 162.1TR T60 | |
| ALTALINK | 23-Mar-26 08:00 | 01-Apr-26 16:00 | 9.33 Days
Continuous |
347s 199W (347s AML Fox Creek) | Breaker 347s199W breaker replacement. | |
| ALTALINK | 23-Mar-26 12:00 | 26-Mar-26 16:00 | 3.17 Days
Continuous |
430s 452 (430s Ursus) | Replace 430s452 Breaker CTs. | |
| ALTALINK | 23-Mar-26 14:00 | 24-Mar-26 16:00 | 26 Hours
Continuous |
89s T2 (89s Ellerslie) | Replace Oil level gauges & Modify qualitrol temps | |
| ALTALINK | 23-Mar-26 14:00 | 26-Mar-26 16:00 | 3.08 Days
Continuous |
310p 1852 (310p Sundance) | 310s1852 240kV breaker maintenance | |
| BHE Canada | 24-Mar-26 07:00 | 24-Mar-26 18:00 | 11 Hours
Continuous |
MATL (120s Picture Butte - Montana), 120s MATL PST (120s Picture Butte), 120s 1052 (120s Picture Butte), 120s 1352 (120s Picture Butte) | RTU replacement | AB-MATL |
| ALTALINK | 25-Mar-26 09:30 | 25-Mar-26 11:30 | 2 Hours
Continuous |
320p 552 (320p Keephills) | 320s552 Breaker Maintenance | |
| ALTALINK | 25-Mar-26 10:00 | 25-Mar-26 14:00 | 4 Hours
Continuous |
250p 1 (250p Bighorn Plant) | maintenance | |
| ENMAX | 25-Mar-26 12:00 | 25-Mar-26 18:00 | 6 Hours
Continuous |
23.80L (74s Janet - SS-23), 23.4TR (SS-23) | Spring Substation Washing | |
| ALTALINK | 25-Mar-26 13:30 | 25-Mar-26 16:00 | 2.5 Hours
Continuous |
320p 152 (320p Keephills) | 320s152 Breaker Maintenance | |
| ALTALINK | 26-Mar-26 09:00 | 26-Mar-26 11:30 | 2.5 Hours
Continuous |
63s 24 (63s Red Deer), 63s T1 (63s Red Deer) | PRC5 Maint & First Trip | |
| ALTALINK | 26-Mar-26 09:30 | 26-Mar-26 16:00 | 6.5 Hours
Continuous |
320p 752 (320p Keephills) | 320s752 Breaker Maintenance | |
| ALTALINK | 26-Mar-26 10:00 | 26-Mar-26 14:00 | 4 Hours
Continuous |
250p 2 (250p Bighorn Plant) | maintenance | |
| ALTALINK | 26-Mar-26 13:30 | 26-Mar-26 16:00 | 2.5 Hours
Continuous |
63s 25 (63s Red Deer), 63s T2 (63s Red Deer) | PRC5 Maint & First Trip | |
| EPCOR | 30-Mar-26 07:00 | 31-Mar-26 17:00 | 1.42 Days
Continuous |
805s T1 (805s Jasper), 805s C1 (805s Jasper), EP 805s J2401 (EP 805s Jasper), EP 805s J2403 (EP 805s Jasper), EP 805s J2408 (EP 805s Jasper), EP 805s J724 (EP 805s Jasper), EP 805s J722 (EP 805s Jasper) | Jasper: TX1, CAP BANK Relay Maintenance and JDS21 Repair | |
| EPCOR | 30-Mar-26 07:00 | 02-Apr-26 17:00 | 3.42 Days
Continuous |
987s T3 (987s Clover Bar), 987s C2407 (987s Clover Bar) | Cloverbar: C2407 (SF6) Breaker Maintenance and TX3 Relay Maintenance | |
| ALTALINK | 30-Mar-26 07:00 | 08-Apr-26 18:00 | 9.46 Days
Continuous |
87s 2352 (87s Gaetz), 87s 1252 (87s Gaetz), 87s T2 (87s Gaetz), 87s 240kV East Bus (87s Gaetz), 914L (86s Bigstone - 87s Gaetz) | Installing new 87s1352 & 87s1552. Closing Open points 'E', 'J', 'K' & 'L'. Creating permanent bus cut between 87s27 & 87s 240kV East Bus. | |
| ATCO | 30-Mar-26 08:00 | 31-Mar-26 16:00 | 1.33 Days
Continuous |
7L50 (757s Battle River - 491L tap) | Replace structure 7L50-235 | |
| ATCO, ALBIAN | 30-Mar-26 09:00 | 31-Mar-26 15:00 | 30 Hours
Continuous |
920s 901T (920s Jackpine) | Isolation of 901T for CNRL to troubleshoot problems on their system | |
| ALTALINK | 30-Mar-26 13:00 | 02-Apr-26 16:00 | 3.13 Days
Continuous |
430s 652 (430s Ursus) | 430s652 CT Replacement. | |
| ALTALINK | 30-Mar-26 14:00 | 03-Apr-26 17:00 | 4.13 Days
Continuous |
320p 1352 (320p Keephills) | CT Replacement w/ RMH CTs associated w/ 320p1352 (CT13). | |
| ALTALINK | 31-Mar-26 08:00 | 31-Mar-26 17:00 | 9 Hours
Continuous |
428s 733N (428s Namaka), 733L (151s Strathmore - 428S Namaka) | 428s733N 138kV CB Minor maintenance, First Trip PRC 5. | |
| ALTALINK, NOVACORP | 01-Apr-26 08:00 | 02-Apr-26 18:00 | 1.42 Days
Continuous |
330L1 (535s Joffre - 330s Nova Joffre) | electrical equipment maintenance, corrective work, line OPGW fiber testing and PRC-005 testing | |
| ALTALINK | 01-Apr-26 09:00 | 01-Apr-26 16:00 | 7 Hours
Continuous |
428s 23 (428s Namaka) | 428s23 PRC5 Minor Maintenance, First Trip | |
| ATCO, ALBIAN | 01-Apr-26 09:00 | 02-Apr-26 15:00 | 30 Hours
Continuous |
920s 902T (920s Jackpine) | Isolation of 902T for CNRL to troubleshoot problems on their system | |
| ATCO | 01-Apr-26 18:00 | 01-Apr-26 18:30 | 30 Mins
Continuous |
7L199 (347s AML Fox Creek - 741s ATC Fox Creek) | Altalink request ATCO to operate A741s 702 to facilitate 1st energization of of new 347s199W. | |
| ENMAX, ALTALINK | 03-Apr-26 08:00 | 03-Apr-26 16:00 | 8 Hours
Continuous |
36.81L (44s Bearspaw Plant - SS-36) | Shield Wire Replacement | |
| ALTALINK, ENMAX | 03-Apr-26 09:00 | 03-Apr-26 16:00 | 7 Hours
Continuous |
44s 36.81E (44s Bearspaw Plant), 36.81L (44s Bearspaw Plant - SS-36) | Shield Wire Replacement | |
| ENMAX, ALTALINK | 04-Apr-26 08:00 | 04-Apr-26 18:00 | 10 Hours
Continuous |
1003L (74s Janet - SS-25) | Surge Arrestor Power Factor Test - 25MD240-1003 | |
| ENMAX, ALTALINK | 04-Apr-26 08:00 | 04-Apr-26 18:00 | 10 Hours
Continuous |
1003L (74s Janet - SS-25) | Surge Arrestor Power Factor Test - 25MD240-1003 | |
| ENMAX, ALTALINK | 05-Apr-26 08:00 | 05-Apr-26 18:00 | 10 Hours
Continuous |
985L (74s Janet - SS-25) | Surge Arrestor Power Factor Test - 25MD240-985 | |
| ENMAX, ALTALINK | 05-Apr-26 08:00 | 05-Apr-26 18:00 | 10 Hours
Continuous |
985L (74s Janet - SS-25) | Surge Arrestor Power Factor Test - 25MD240-985 | |
| ALTALINK | 06-Apr-26 08:00 | 09-Apr-26 16:00 | 3.33 Days
Continuous |
525s 850N (525s Carseland), 850L (525s Carseland - 678s Okotoks) | 525s CT Replacement for 152 (850N) breaker | |
| SUNCOR | 06-Apr-26 08:00 | 10-Apr-26 20:00 | 4.5 Days
Continuous |
29EDD-94 29PP-97 260kV Bus (29EDD-94 Voyageur) | 29EDD94, 29PT-412B Oil Leak (29PP-97 260KV outage) - Leak repair and top up (9001051293) TDEC | |
| ENMAX | 06-Apr-26 08:00 | 14-Apr-26 16:00 | 8.33 Days
Continuous |
65.2TR (SS-65) | Tap Changer Inspection - 65.2-TC | |
| ALTALINK | 06-Apr-26 13:00 | 09-Apr-26 17:00 | 3.17 Days
Continuous |
430s 152 (430s Ursus) | Replace 430s152 Breaker CTs | |
| EPCOR | 07-Apr-26 07:00 | 10-Apr-26 17:00 | 3.42 Days
Continuous |
T2 (EP Riverview), RW2402 (EP Riverview), RW2403 (EP Riverview) | Riverview: TX2 Zone, Scaffold Removal | |
| Syncrude | 08-Apr-26 08:00 | 20-Apr-26 16:00 | 12.33 Days
Continuous |
Mildred T6 (Syncrude Mildred Lake), 6335 (Syncrude Mildred Lake), 634 (Syncrude Mildred Lake), 635 (Syncrude Mildred Lake) | SCL - Repair Tap Changer in T6 Transformer. | |
| ALTALINK | 09-Apr-26 08:30 | 09-Apr-26 16:00 | 7.5 Hours
Continuous |
63s 752 (63s Red Deer) | CT Testing - Doble, IDAX, DGA | |
| EPCOR | 10-Apr-26 07:00 | 24-Apr-26 17:00 | 14.42 Days
Continuous |
330p 1209 (330p Genesee), 330p 1206 (330p Genesee), 330p 1203 (330p Genesee), 330p 1211 (330p Genesee), 330p 1215 (330p Genesee), 330p 12TC2 (330p Genesee), 330p 809 (330p Genesee) | Genesee: 500kV BUS 2, POW Project Installation | |
| EPCOR | 11-Apr-26 07:00 | 25-Apr-26 17:00 | 14.42 Days
Continuous |
330P GT7 (330p Genesee), 330p 1215 (330p Genesee), 330p 1214 (330p Genesee) | POW project installation | |
| ALTALINK, EPCOR | 13-Apr-26 07:00 | 17-Apr-26 17:00 | 4.42 Days
Continuous |
947L (89s Ellerslie - 987s Clover Bar), 987s C2402 (987s Clover Bar), 987s C2404 (987s Clover Bar) | Cloverbar: 947L Relay Maintenance | |
| ALTALINK | 13-Apr-26 07:00 | 20-Apr-26 18:00 | 7.46 Days
Continuous |
87s T1 (87s Gaetz), 87s 240kV West Bus (87s Gaetz), 914L (86s Bigstone - 87s Gaetz), 87s 2352 (87s Gaetz), 87s 1252 (87s Gaetz), 87s 1352 (87s Gaetz) | Closing Open point 'I' and creating second permanent bus cut between 87s26 & 87s 240kV West Bus. | |
| EPCOR | 13-Apr-26 07:00 | 29-May-26 17:00 | 46.42 Days
Continuous |
805s T4 (805s Jasper) | Jasper TX4: Bushing Change (PCB) and Fan Failure Repair and Conservator Tank Inspection and TX Re-gasketing | |
| ALTALINK | 13-Apr-26 08:00 | 16-Apr-26 16:00 | 3.33 Days
Continuous |
525s 851X (525s Carseland), 851L (253s Blackie - 525s Carseland) | Replace 525s851X breaker CTs | |
| ATCO | 13-Apr-26 10:00 | 17-Apr-26 16:00 | 4.25 Days
Continuous |
951s SVC (951s Thickwood) | Annual maintenance/inspection, software patching, password changes | |
| ALTALINK | 13-Apr-26 12:00 | 16-Apr-26 16:00 | 3.17 Days
Continuous |
430s 352 (430s Ursus) | 430s352s CT Replacement. | |
| ATCO | 14-Apr-26 07:00 | 17-Apr-26 13:00 | 3.25 Days
Continuous |
7L101 (790s Poplar Hill - 944s Lowe Lake) | maintenance | |
| ALTALINK | 14-Apr-26 08:00 | 15-Apr-26 16:00 | 1.33 Days
Continuous |
244s C1 (244s Bowmanton), 244s 752 (244s Bowmanton) | Replace secondary control fuses in breaker control cabinet.
|
|
| ALTALINK | 14-Apr-26 08:00 | 15-Apr-26 16:00 | 1.33 Days
Continuous |
244s C2 (244s Bowmanton), 244s 1052 (244s Bowmanton) | Replace control fuses within breaker secondary cabinet
|
|
| ALTALINK | 14-Apr-26 08:00 | 15-Apr-26 16:00 | 1.33 Days
Continuous |
244s C3 (244s Bowmanton), 244s 952 (244s Bowmanton) | Replace secondary control fuses in breaker control cabinet.
|
|
| ENMAX, ALTALINK | 18-Apr-26 08:00 | 18-Apr-26 18:00 | 10 Hours
Continuous |
50L (44s Bearspaw Plant - SS-21), 21.2TR (SS-21) | HV SW Maintenance 21SW90. Spring Substation Washing. Reversing Switch Check - 21.2-TC | |
| ENMAX, ALTALINK | 18-Apr-26 09:00 | 18-Apr-26 17:00 | 8 Hours
Continuous |
50L (44s Bearspaw Plant - SS-21), 44s 50X (44s Bearspaw Plant) | HV SW Maintenance 21SW90. Spring Substation Washing. ReversingSwitch Check - 21.2-TC | |
| ALTALINK, EPCOR | 18-Apr-26 09:30 | 20-Apr-26 17:00 | 2.31 Days
Continuous |
1056L (89s Ellerslie - 629s Argyll Transfer Station) | 1056L: Aerial Washing Program | |
| ALTALINK, EPCOR | 18-Apr-26 09:30 | 20-Apr-26 17:00 | 2.31 Days
Continuous |
1056L (89s Ellerslie - 629s Argyll Transfer Station) | 1056L: Aerial Washing Program
|
|
| BCH | 20-Apr-26 09:00 | 08-May-26 17:00 | 18.33 Days
Continuous |
5L98 (BCH Nicola - BCH Vaseux Lake) | replace spacer damper and insulator | AB-BC |
| BCH | 20-Apr-26 09:00 | 08-May-26 17:00 | 18.33 Days
Continuous |
5L98 (BCH Nicola - BCH Vaseux Lake) | replace spacer damper and insulator | AB-BC |
| ATCO, CNRL | 20-Apr-26 10:00 | 24-Apr-26 16:00 | 4.25 Days
Continuous |
838s RTU/SCADA (838s Horizon Mining), 842s RTU/SCADA (842s Horizon Upgrading) | Brief SCADA Outages(15-30min) while RTU updates are completed. | |
| ENMAX, ALTALINK | 20-Apr-26 12:00 | 20-Apr-26 18:00 | 6 Hours
Continuous |
28.80L (42s Sarcee - SS-28), 28.2TR (SS-28) | Spring Substation Washing | |
| ATCO | 20-Apr-26 12:00 | 24-Apr-26 17:00 | 4.21 Days
Continuous |
813s SVC (813s Little Smoky) | SVC MAINTENANCE | |
| ALTALINK, ENMAX | 20-Apr-26 13:00 | 20-Apr-26 17:00 | 4 Hours
Continuous |
42s 28 (42s Sarcee), 28.80L (42s Sarcee - SS-28) | Spring Substation Washing | |
| ATCO | 20-Apr-26 13:00 | 20-Apr-26 17:30 | 4.5 Hours
Continuous |
755s 901 (755s Cordel) | PRC-005 - TRIP & CLOSE COIL TESTING. | |
| ALTALINK | 21-Apr-26 08:00 | 24-Apr-26 17:00 | 3.38 Days
Continuous |
510s 2652 (510s Sunnybrook), 510s 2752 (510s Sunnybrook), AML 511s 4852 (AML 511s Crossings), AML 511s 4952 (AML 511s Crossings), 1325L (510s Sunnybrook - AML 511s Crossings) | Repair of the base of DIW 1 drivetrain at Sunnybrook and Annual Valve cooling maintenance at Crossings | |
| ATCO | 21-Apr-26 09:00 | 26-Apr-26 17:00 | 5.33 Days
Continuous |
9LA93 (973s Lanes Lake - 9L93 tap) | Cutover and commission 9L93 protection ccts from Bkrs 901/903 to Bkrs 904/905 |
|
| ATCO | 21-Apr-26 09:30 | 21-Apr-26 12:00 | 2.5 Hours
Continuous |
755s 902 (755s Cordel) | PRC-005 - TRIP & CLOSE COIL TESTING. | |
| ATCO | 21-Apr-26 10:00 | 21-Apr-26 12:00 | 2 Hours
Continuous |
789s 701 (789s Keg River), 7L64 (779s Chinchaga River - 789s Keg River) | PRC Trip Coil Testing | |
| ATCO | 21-Apr-26 12:01 | 21-Apr-26 14:00 | 119 Mins
Continuous |
789s 702 (789s Keg River), 7L62 (789s Keg River - 797s Kemp River) | PRC Trip Coil Testing | |
| ATCO | 21-Apr-26 13:00 | 21-Apr-26 17:30 | 4.5 Hours
Continuous |
755s 904 (755s Cordel) | PRC-005 - TRIP & CLOSE COIL TESTING. | |
| ALTALINK, WPLP | 22-Apr-26 08:30 | 22-Apr-26 16:30 | 8 Hours
Continuous |
268s 503 (268s Whitecourt), 503L (268s Whitecourt - 323s Whitecourt Power) | Customer outage for their work on 323s3. | |
| ATCO | 22-Apr-26 09:30 | 24-Apr-26 17:30 | 2.33 Days
Continuous |
755s 903 (755s Cordel) | PRC-005 - TRIP & CLOSE COIL TESTING. | |
| ATCO | 22-Apr-26 10:00 | 22-Apr-26 12:00 | 2 Hours
Continuous |
789s 703 (789s Keg River), 7L59 (789s Keg River - 7L59 tap) | PRC Trip Coil Testing | |
| ATCO | 22-Apr-26 12:01 | 22-Apr-26 14:00 | 119 Mins
Continuous |
789s 704 (789s Keg River), 7L58 (789s Keg River - 905s Meikle) | PRC Trip Coil Testing | |
| ALTALINK | 22-Apr-26 23:30 | 23-Apr-26 02:30 | 3 Hours
Continuous |
62s 1 (62s Brazeau Plant) | maintenance | |
| ALTALINK | 23-Apr-26 03:30 | 23-Apr-26 06:30 | 3 Hours
Continuous |
62s 2 (62s Brazeau Plant) | maintenence | |
| Syncrude | 24-Apr-26 08:00 | 30-Apr-26 16:00 | 6.33 Days
Continuous |
11A (Aurora), 11 (Aurora), 11B (Aurora), 21 (Aurora), 21A (Aurora), 21B (Aurora), 31 (Aurora), 31A (Aurora), 31B (Aurora), 89-210 (Aurora), 89-51 (Aurora), T1 (Aurora), 211A (Aurora), 212B (Aurora), 211 (Aurora), 222B (Aurora), 222 (Aurora), 222A (Aurora), 221B (Aurora), 221A (Aurora), 221 (Aurora), 89-224 (Aurora), G21 (Aurora), T4 (Aurora) | SCL - G01 Zone 2 6yr PM | |
| ENMAX, ALTALINK | 25-Apr-26 08:00 | 26-Apr-26 18:00 | 1.42 Days
Continuous |
20.82L (SS-20 - SS-21), 21.80L (42s Sarcee - SS-21), 21.1TR (SS-21), 21.4TR (SS-21) | HV SW Maintenance SW84, SW85, MD-21.4TR. Spring Substation Washing. 21.1TR west phase, corona on String bus insulator-on plate. Altalink required to remove AML VT4 60S100 fuses | |
| ALTALINK, ENMAX | 25-Apr-26 09:00 | 26-Apr-26 17:00 | 1.33 Days
Continuous |
42s 21 (42s Sarcee), 21.80L (42s Sarcee - SS-21) | HV SW Maintenance SW84, SW85, MD-21.4TR. Spring Substation Washing. 21.1TR west phase, corona on String bus insulator-on plate. Altalink required to remove AML VT4 60S100 fuses | |
| BCH, BPA | 26-Apr-26 09:00 | 30-Apr-26 17:00 | 4.33 Days
Continuous |
5L52 (BPA Custer - BCH Ingledow) | doble and inspection | AB-BC |
| EPCOR | 27-Apr-26 07:00 | 27-Apr-26 17:00 | 10 Hours
Continuous |
RW2401 (EP Riverview) | Riverview: RW2401 (SF6) Breaker Maintenance | |
| ALTALINK, EPCOR | 27-Apr-26 07:00 | 30-Apr-26 17:00 | 3.42 Days
Continuous |
1055L (629s Argyll Transfer Station - 816s Petrolia), 816s P2402 (816s Petrolia), 816s P2403 (816s Petrolia) | 1055L/Petrolia: SA/CT/CVT Doble and PDS4/PDS5 Disconnect Maintenance and Aerial Washing Program | |
| ALTALINK | 27-Apr-26 07:00 | 11-May-26 18:00 | 14.46 Days
Continuous |
87s T2 (87s Gaetz), 87s 240kV East Bus (87s Gaetz), 87s 1552 (87s Gaetz), 87s 1652 (87s Gaetz), 87s 1952 (87s Gaetz), 87s 1252 (87s Gaetz) | Closing Open points 'A' & 'C' | |
| ALTALINK, EPCOR | 27-Apr-26 09:30 | 30-Apr-26 17:00 | 3.31 Days
Continuous |
1057L (89s Ellerslie - 657s Summerside), 657s SU2401 (657s Summerside), 657s SU2402 (657s Summerside) | 1057L/Summerside: CVT/Arrestor Doble, SUDS1/SUDS3/SUDS9 Disconnect Maintenance | |
| ALTALINK, EPCOR | 27-Apr-26 09:30 | 30-Apr-26 17:00 | 3.31 Days
Continuous |
89s 352 (89s Ellerslie), 89s 452 (89s Ellerslie), 1057L (89s Ellerslie - 657s Summerside) | 1057L/Summerside: CVT/Arrestor Doble, SUDS1/SUDS3/SUDS9 Disconnect Maintenance | |
| ATCO | 27-Apr-26 09:30 | 01-May-26 17:30 | 4.33 Days
Continuous |
755s 905 (755s Cordel), 755s 906 (755s Cordel), 9L953 (574s Nilrem - 755s Cordel) | PRC-005 - TRIP COIL TESTING - BREAKER 905 @ 755S PRC-005 - TRIP & CLOSE COIL TESTING - BREAKER 906 @ 755S Adjust 905B Switch at 755s Cordel Adjust 906A Switch at 755s Cordel Repair 9L953D1 at 755s Cordel RTXP Test Switch Mitigation and Replacement |
|
| ATCO, ALTALINK | 27-Apr-26 09:30 | 01-May-26 17:30 | 4.33 Days
Continuous |
953L (574s Nilrem - 755s Cordel) | Switch and breaker maintenance | |
| ATCO | 27-Apr-26 12:00 | 04-May-26 12:00 | 7 Days
Continuous |
730s STATCOM (730s Rycroft) | SVC ANNUAL INSPECTION @ RYCROFT 730S SVC FIRE SYSTEM INSPECTION @ RYCROFT 730S |
|
| ATCO | 28-Apr-26 09:00 | 01-May-26 12:00 | 3.13 Days
Continuous |
930s SVC (930s Arcenciel) | SVC AIR COOLED MAINTENANCE @ ARCENCIEL 930S | |
| ALTALINK | 29-Apr-26 07:30 | 07-May-26 12:00 | 8.19 Days
Continuous |
275s T1 (275s Jenner) | Relace switch 275s37 and 275s39. Replace 25kV post insulators | |
| ALTALINK | 29-Apr-26 08:00 | 07-May-26 16:00 | 8.33 Days
Continuous |
275s T1 (275s Jenner) | 275sT1 Oil Reclaim, Maintenance, Plugged Radiator | |
| ENMAX | 02-May-26 08:00 | 02-May-26 18:00 | 10 Hours
Continuous |
162.1TR (SS-162), 240kV North Bus (SS-162), 138kV North Bus (SS-162) | Summer Substation Washing | |
| ENMAX | 03-May-26 08:00 | 03-May-26 18:00 | 10 Hours
Continuous |
162.2TR (SS-162), 138kV South Bus (SS-162), 240kV South Bus (SS-162) | Summer Substation Washing | |
| EPCOR | 04-May-26 07:00 | 08-May-26 17:00 | 4.42 Days
Continuous |
805s T4 (805s Jasper), EP 805s J2406 (EP 805s Jasper), EP 805s J2405 (EP 805s Jasper) | Jasper: TX4 Relay Maintenance | |
| EPCOR | 04-May-26 07:00 | 10-May-26 17:00 | 6.42 Days
Continuous |
BR721 (Rossdale), 814s T1 (814s Bellamy), 814s B2401 (814s Bellamy), 814s B2407 (814s Bellamy) | Bellamy: TX1 Zone Doble and BR721 Breaker Maintenance/Doble, and BDS15 Disconnect Maintenance | |
| EPCOR | 04-May-26 07:00 | 10-May-26 17:00 | 6.42 Days
Continuous |
557s T2 (557s Castle Downs), 557s CD2403 (557s Castle Downs), 557s CD2404 (557s Castle Downs) | Castledowns: TX2 Doble, Tap Changer Maintenance, and CDAB2CDDS6/CDDS7 Disconnect Maintenance | |
| BCH, BPA | 04-May-26 08:00 | 15-May-26 17:00 | 11.38 Days
Continuous |
2L112 (BPA Boundary - BCH Nelway) | emergency replacement of a boundary PCB | AB-BC |
| ATCO | 04-May-26 09:00 | 18-May-26 17:30 | 14.35 Days
Continuous |
13L50 (2029s Heathfield - 2075s Newell) | Kinbrook Addition to 2075s | |
| ATCO | 04-May-26 09:00 | 18-May-26 17:30 | 14.35 Days
Continuous |
2029s T11 (2029s Heathfield) | Kinbrook Addition to 2075s Newell. | |
| ATCO | 04-May-26 09:00 | 18-May-26 17:30 | 14.35 Days
Continuous |
2075s T11 (2075s Newell) | Kinbrook Addition to 2075s Newell. | |
| ALTALINK, GREENGATEP | 04-May-26 18:00 | 06-Jun-26 17:00 | 32.96 Days
Continuous |
962L (972s Tinchebray - 87s Gaetz) | Switch needs to remain open until ATCO is ready @ 972s for energization | |
| ALTALINK, GREENGATEP | 04-May-26 18:00 | 06-Jun-26 17:00 | 32.96 Days
Continuous |
986L (972s Tinchebray - 87s Gaetz) | Switch needs to remain open until ATCO is ready @ 972s for energization | |
| BCH | 05-May-26 09:00 | 06-May-26 17:00 | 1.33 Days
Continuous |
5L98 (BCH Nicola - BCH Vaseux Lake) | NIC 5CB51 rebuild | AB-BC |
| ATCO | 05-May-26 09:00 | 07-May-26 17:00 | 2.33 Days
Continuous |
9L59 (801s Anderson - 9LA59 tap), 9L59 (972s Tinchebray - 9LA59 tap) | Connect new 907B to 900BS1 |
|
| ALTALINK | 06-May-26 08:00 | 07-May-26 17:00 | 1.38 Days
Continuous |
132s 37 (132s Ware Junction), 132s 40 (132s Ware Junction), 275s 1852 (275s Jenner), 275s 1752 (275s Jenner), 951L (132s Ware Junction - 275s Jenner) | Center phase socket clevis that holds yolk plate has a keeper key backed out. | |
| ATCO | 07-May-26 09:00 | 19-May-26 17:00 | 12.33 Days
Continuous |
9L16 (755s Cordel - 972s Tinchebray) | GOI is required on 907B to isolate 908/909 bay and new 9L16. | |
| ATCO | 08-May-26 09:00 | 09-May-26 17:00 | 1.33 Days
Continuous |
972s 240kV Bus 900BS2 (972s Tinchebray) | Connect new 909A to 900BS2 | |
| ENMAX | 09-May-26 07:00 | 09-May-26 12:00 | 5 Hours
Continuous |
771L (SS-47 - SS-162), 162B138-RB82 (SS-162), 47.1TR (SS-47), 47B138-771/1 (SS-47), 47B138-771 (SS-47), 47.2TR (SS-47), 162B138-RB81 (SS-162) | Summer Substation Washing | |
| ENMAX, ALTALINK | 09-May-26 12:00 | 09-May-26 18:00 | 6 Hours
Continuous |
162B138-RB80 (SS-162), 162B138-RB81 (SS-162), 162.81L (391s Balzac - SS-162) | Summer Substation Washing | |
| ENMAX, ALTALINK | 10-May-26 08:00 | 10-May-26 12:00 | 4 Hours
Continuous |
162B240-RB133 (SS-162), 918L (281s Johnson - SS-162), 162B240-RB132 (SS-162) | Summer Substation Washing | |
| ALTALINK | 10-May-26 08:00 | 10-May-26 17:00 | 9 Hours
Continuous |
268s 199N (268s Whitecourt), 199L (268s Whitecourt - 199AL tap) | Replace keeper keys at structure 375 | |
| ALTALINK | 10-May-26 08:00 | 12-May-26 17:00 | 2.38 Days
Continuous |
336s 612 (336s Fincastle), 368s 612 (368s Burdett), 612L (336s Fincastle - 368s Burdett) | Replacing cross arms and insulators on structures 174, 196, 197, 198, 203, 205, 206, 207, 208, 209, 210, 211, and 212 | |
| ENMAX, ALTALINK | 10-May-26 12:00 | 10-May-26 18:00 | 6 Hours
Continuous |
932L (74s Janet - SS-162), 162B240-RB136 (SS-162), 162B240-RB135 (SS-162) | Summer Substation Washing | |
| EPCOR | 11-May-26 07:00 | 13-May-26 17:00 | 2.42 Days
Continuous |
557s T1 (557s Castle Downs) | Castledowns: TX1 Tap Changer Maintenance and Conservator Pipe Leak Repair | |
| ATCO, ALTALINK | 11-May-26 07:00 | 14-May-26 18:00 | 3.46 Days
Continuous |
7LA114 (658s Chard - 7L114 tap), 7L114 (72s Leismer - 7LA114 tap), 7L114 (907s Waddell - 7LA114 tap), 907s Waddell | AltaLink outage on 72sT2 causing an outage to 7L114 at 907S | |
| EPCOR | 11-May-26 07:00 | 17-May-26 17:00 | 6.42 Days
Continuous |
814s T2 (814s Bellamy), BR722 (Rossdale), 814s B2402 (814s Bellamy), 814s B2406 (814s Bellamy) | Bellamy: TX2 Zone Doble and BR722 Breaker Maintenance/Doble, and BDS17 Disconnect Maintenance | |
| EPCOR | 11-May-26 07:00 | 22-May-26 17:00 | 11.42 Days
Continuous |
52s T1 (52s East Industrial) | East Industrial: TX1 DGA Monitor Replacement | |
| ALTALINK, ATCO | 11-May-26 08:00 | 14-May-26 16:00 | 3.33 Days
Continuous |
72s 1052 (72s Leismer), 7L114 (72s Leismer - 7LA114 tap) | Customer maintenance | |
| ALTALINK | 11-May-26 08:00 | 14-May-26 17:00 | 3.38 Days
Continuous |
72s T2 (72s Leismer), 72s 1052 (72s Leismer) | Transformer maintenance, doble, install Coresense & Qualitrol | |
| ATCO | 11-May-26 13:00 | 14-May-26 13:00 | 3 Days
Continuous |
827s SVC (827s Cranberry Lake) | SVC AIR COOLED MAINTENANCE SVC AUX TRIP RELAY TESTING SVC MICROPROCESSOR RELAY TESTING SPR TESTING - TRANSFORMER 703T TRIP COIL TESTING 401, 703 |
|
| ATCO, ALTALINK, ENBRIDGE | 11-May-26 13:00 | 14-May-26 13:00 | 3 Days
Continuous |
7L114 (72s Leismer - 7LA114 tap), 7LA114 (658s Chard - 7L114 tap), 7L114 (907s Waddell - 7LA114 tap) | Planned inspection on 7L114/7LA114 to take place during the AltaLink outage to their T2 transformer at 72S | |
| ALTALINK, ICPCL | 12-May-26 08:00 | 13-May-26 17:00 | 1.38 Days
Continuous |
225s 225E (225s Magrath), 67s 225 (67s Stirling), 225AL (313s Raymond Reservoir - 225L tap), 225L (225s Magrath - 225AL tap), 225L (67s Stirling - 225AL tap) | 93, 149 replace arms and insulators | |
| ATCO, ALBIAN, CNRL | 14-May-26 08:00 | 29-May-26 16:00 | 15.33 Days
Continuous |
919s 908 (919s Hartley), 847s 902T (847s Muskeg River) | CNRL Request COG to open 908 breaker and 902TD in the Hartley 919S substation at CNRL Albian Sands. |
|
| SUNCOR | 18-May-26 08:00 | 24-May-26 20:00 | 6.5 Days
Continuous |
29PL9-12 (29EDD-34 - 29EDD-65) | 29EDD34;29PL9-12 SYSTEM;PM 5y,10y |
|
| EPCOR | 19-May-26 07:00 | 01-Jun-26 07:00 | 13 Days
Continuous |
T1 (Rossdale), R721 (Rossdale), RR723 (Rossdale), BR722 (Rossdale), 814s T2 (814s Bellamy) | Rossdale: TX1 LCR Demo | |
| EPCOR | 19-May-26 07:00 | 10-Jul-26 17:00 | 52.42 Days
Continuous |
805s T4 (805s Jasper), EP 805s J2405 (EP 805s Jasper), EP 805s J2406 (EP 805s Jasper) | Jasper: J2406/JDS10 Replacement LCR | |
| ATCO | 19-May-26 09:00 | 19-May-26 17:00 | 8 Hours
Continuous |
9L16 (755s Cordel - 972s Tinchebray), 755s 904 (755s Cordel), 755s 905 (755s Cordel), 972s 903 (972s Tinchebray) | Disconnect 9L16 from existing A-frame deadend and 9L16D2 (to be renamed 9L86D1) Restore bus leave renamed 9L86D1 open for future line connection. |
|
| ATCO | 19-May-26 09:00 | 29-May-26 17:00 | 10.33 Days
Continuous |
9L16 (755s Cordel - 972s Tinchebray) | Disconnect 9L16 from existing A-frame deadend and 9L16D2 (to be renamed 9L86D1) Restore bus leave renamed 9L86D1 open for future line connection. |
|
| ALTALINK | 19-May-26 23:00 | 21-May-26 07:00 | 1.33 Days
Continuous |
250p 1 (250p Bighorn Plant) | maintenance | |
| ALTALINK | 20-May-26 07:00 | 21-May-26 07:00 | 24 Hours
Continuous |
250p 2 (250p Bighorn Plant) | maintenance | |
| ALTALINK | 20-May-26 07:30 | 28-May-26 12:00 | 8.19 Days
Continuous |
275s T2 (275s Jenner) | Replace switch 275s45, 275s49, 275s47. Replace 25kV Post Insulators | |
| ATCO | 20-May-26 08:00 | 21-May-26 13:00 | 29 Hours
Continuous |
9L84 (934s Blackfly - 977s Salt Creek) | Outage on 9L84 to replace 3 damaged insulator strings on structure 47 |
|
| ALTALINK | 20-May-26 09:00 | 28-May-26 17:00 | 8.33 Days
Continuous |
275s T2 (275s Jenner) | 275sT2 Oil Reclaim and Maint. | |
| ALTALINK, Lethbridge | 22-May-26 08:00 | 22-May-26 17:00 | 9 Hours
Continuous |
207L (111s Coalbanks - 370s North Lethbridge) | 207L Hardware tightening on structure 8 | |
| ENMAX, ALTALINK | 23-May-26 08:00 | 23-May-26 11:00 | 3 Hours
Continuous |
5s T1 (5s East Calgary) | Summer Substation Washing | |
| ENMAX, ALTALINK | 23-May-26 11:00 | 23-May-26 13:00 | 2 Hours
Continuous |
5s T2 (5s East Calgary) | Summer Substation Washing | |
| EPCOR | 25-May-26 07:00 | 27-May-26 17:00 | 2.42 Days
Continuous |
816s P2401 (816s Petrolia) | Petrolia: P2401 CT Doble | |
| EPCOR | 25-May-26 07:00 | 05-Jun-26 17:00 | 11.42 Days
Continuous |
987s T4 (987s Clover Bar), 987s C2408 (987s Clover Bar) | Cloverbar: TX4 DGA Monitor Replacement and Relay Maintenance | |
| ATCO | 25-May-26 09:00 | 27-May-26 17:30 | 2.35 Days
Continuous |
2075s 911 (2075s Newell) | BREAKER SF6 3AP4FI MAINTENANCE | |
| ATCO | 25-May-26 10:00 | 26-May-26 16:00 | 30 Hours
Continuous |
715s 701 (715s Leming Lake), 7L583 (715s Leming Lake - 970s Bourque) | PRC-005 Trip Coil Testing, 701CT Inspection/ Testing | |
| ALTALINK | 25-May-26 14:00 | 01-Jun-26 13:30 | 6.98 Days
Continuous |
63s 352 (63s Red Deer) | 63s352 Breaker Replacement.
Outage to be expanded to include line to eliminate LOA hazard with overhead line while lifting breaker onto structure. Grounds will remain installed during transfer of GOI to include the overhead line. Associated request for the expanded outage #26-10204 |
|
| ATCO | 26-May-26 08:00 | 26-May-26 09:59 | 119 Mins
Continuous |
898s 901 (898s Heart Lake) | PRC-005 TRIP COIL TESTING |
|
| ATCO | 26-May-26 10:00 | 26-May-26 11:59 | 119 Mins
Continuous |
898s 902 (898s Heart Lake) | PRC-005 TRIP COIL TESTING |
|
| ATCO | 26-May-26 12:00 | 26-May-26 13:59 | 119 Mins
Continuous |
898s 903 (898s Heart Lake) | PRC-005 TRIP COIL TESTING |
|
| ATCO | 26-May-26 14:00 | 26-May-26 15:59 | 119 Mins
Continuous |
898s 905 (898s Heart Lake) | PRC-005 TRIP COIL TESTING |
|
| ATCO | 27-May-26 08:00 | 27-May-26 09:59 | 119 Mins
Continuous |
898s 906 (898s Heart Lake) | PRC-005 TRIP COIL TESTING |
|
| ALTALINK | 27-May-26 09:00 | 27-May-26 17:00 | 8 Hours
Continuous |
158s 763N (158s Vauxhall), 28s 47 (28s West Brooks), 28s 31 (28s West Brooks), 447s 763A (447s Enchant), 447s 16 (447s Enchant), 763AL (447s Enchant - 763A1L tap), 763L (158s Vauxhall - 763AL tap), 763L (28s West Brooks - 763AL tap) | 447s27 Replace line VT. (Like for like replacement) | |
| ATCO | 27-May-26 10:00 | 27-May-26 11:59 | 119 Mins
Continuous |
898s 908 (898s Heart Lake) | PRC-005 TRIP COIL TESTING |
|
| ATCO | 27-May-26 10:00 | 28-May-26 16:00 | 30 Hours
Continuous |
715s 702 (715s Leming Lake), 7L91 (715s Leming Lake - 826s Marguerite Lake) | PRC-005 Trip Coil Testing, 702CT Inspection/ Testing | |
| ATCO | 27-May-26 12:00 | 27-May-26 13:59 | 119 Mins
Continuous |
898s 909 (898s Heart Lake) | PRC-005 TRIP COIL TESTING |
|
| ATCO | 27-May-26 14:00 | 28-May-26 12:59 | 22.98 Hours
Continuous |
898s 904 (898s Heart Lake) | PRC-005 TRIP COIL TESTING, B PHASE MOTOR CCT DC FAIL TROUBLESHOOTING/ REPAIR |
|
| EPCOR | 28-May-26 07:00 | 30-May-26 17:00 | 2.42 Days
Continuous |
816s P2405 (816s Petrolia) | Petrolia: P2405 CT Doble | |
| EPCOR | 01-Jun-26 07:00 | 03-Jun-26 17:00 | 2.42 Days
Continuous |
816s P2406 (816s Petrolia) | Petrolia: P2406 CT Doble | |
| EPCOR | 01-Jun-26 07:00 | 07-Jun-26 17:00 | 6.42 Days
Continuous |
T4 (Poundmaker), PM721 (Poundmaker), PM2402 (Poundmaker), PM2403 (Poundmaker) | Poundmaker: TX4 Doble and PMAB4/PMDS4/PMDS5 Disconnect Maintenance | |
| ALTALINK | 01-Jun-26 08:00 | 11-Jun-26 15:00 | 10.29 Days
Continuous |
19s 905 (19s Wabamun), 37s Protection & Control (37s North Calder), 37s 82 (37s North Calder), 37s 76 (37s North Calder), 905L (19s Wabamun - 37s North Calder) | Protection upgrade | |
| ATCO | 01-Jun-26 10:00 | 02-Jun-26 16:00 | 30 Hours
Continuous |
715s 703 (715s Leming Lake), 7L66 (715s Leming Lake - 717s Ethel Lake) | PRC-005 Trip Coil Testing, 703CT Inspection/ Testing | |
| ALTALINK | 01-Jun-26 14:00 | 04-Jun-26 16:00 | 3.08 Days
Continuous |
63s 352 (63s Red Deer), 925L (63s Red Deer - 74s Janet) | 63s352 Breaker Replacement.
Expanding outage to include line to eliminate LOA hazard with overhead line while lifting breaker onto structure. Grounds will remain installed during transfer of GOI to include the overhead line. Associated request for previous outage #26-10158 |
|
| ATCO | 02-Jun-26 09:00 | 13-Jun-26 17:00 | 11.33 Days
Continuous |
972s 905B (972s Tinchebray), 972s 906A (972s Tinchebray) | Connect new 9L62 to 972S and prepare to energize. String Conductors/OPGW 9L62 from Str #3 to substation A-frame deadends and connect to 9L62D1, coordinate with AML conductor jumpers and OPGW termination at the TFO boundary 9L86 Str 409 |
|
| SUNCOR | 06-Jun-26 08:00 | 09-Jun-26 20:00 | 3.5 Days
Continuous |
29EDD-1 29EDD1s952 (29EDD-1 Millennium) | 29EDD1s952 - Faulty SF6 Sensors - 300677553 | |
| ALTALINK, BCH | 07-Jun-26 08:00 | 07-Jun-26 17:00 | 9 Hours
Continuous |
786L (799s Coleman - BCH Natal) | Repairing woodpecker damage on structures 94, 112 and 118
Replacing damaged insulator on structure 121 |
|
| EPCOR, ALTALINK | 08-Jun-26 07:00 | 14-Jun-26 17:00 | 6.42 Days
Continuous |
657s T3 (657s Summerside), 657s SU2405 (657s Summerside), 657s SU2401 (657s Summerside) | Summerside: TX3 Doble and SUAB3/SUDS2/SUDS12 Disconnect Maintenance | |
| SUNCOR | 10-Jun-26 08:00 | 13-Jun-26 20:00 | 3.5 Days
Continuous |
29EDD-1 29EDD1s852 (29EDD-1 Millennium) | 29EDD1S852 Replace Densimeter | |
| ALTALINK | 10-Jun-26 23:30 | 11-Jun-26 02:30 | 3 Hours
Continuous |
62s 1 (62s Brazeau Plant) | maintenence | |
| ALTALINK | 11-Jun-26 03:30 | 11-Jun-26 06:30 | 3 Hours
Continuous |
62s 2 (62s Brazeau Plant) | maintenence | |
| ALTALINK | 11-Jun-26 10:00 | 11-Jun-26 12:00 | 2 Hours
Continuous |
37s 88 (37s North Calder) | Breaker fail trip testing | |
| ALTALINK | 11-Jun-26 13:00 | 11-Jun-26 15:00 | 2 Hours
Continuous |
37s 81 (37s North Calder) | Breaker fail trip testing | |
| SUNCOR | 14-Jun-26 08:00 | 17-Jun-26 20:00 | 3.5 Days
Continuous |
29EDD-1 29EDD1s1052 (29EDD-1 Millennium) | 29EDD1S1052 Densimeter Replacement - 300347749 | |
| ATCO | 14-Jun-26 09:00 | 25-Jun-26 17:00 | 11.33 Days
Continuous |
9L62 (972s Tinchebray - 87s Gaetz) | Work on parallel line 9L86 | |
| ATCO, CNRL | 15-Jun-26 05:00 | 29-Jun-26 10:00 | 14.21 Days
Continuous |
859s 701TD (859s Primrose), 859s 701 (859s Primrose), 859s 704 (859s Primrose), 859s Protection & Control (859s Primrose), 859s RTU/SCADA (859s Primrose), 859s 52G (859s Primrose), 859s 701T (859s Primrose) | maintenance | |
| EPCOR | 15-Jun-26 07:00 | 19-Jun-26 17:00 | 4.42 Days
Continuous |
987s GT2 (987s Clover Bar) | Cloverbar: | |
| ALTALINK | 15-Jun-26 09:00 | 15-Jun-26 16:00 | 7 Hours
Continuous |
37s Protection & Control (37s North Calder) | 930L MOD (37s72) supervisory cutovers and function testing | |
| ATCO | 15-Jun-26 09:30 | 17-Jun-26 17:30 | 2.33 Days
Continuous |
801s 909 (801s Anderson) | BREAKER MIN OIL HLR COMPLETE TESTING | |
| ALTALINK, EPCOR | 15-Jun-26 09:30 | 19-Jun-26 17:00 | 4.31 Days
Continuous |
915L (38s East Edmonton - 987s Clover Bar), 987s C2403 (987s Clover Bar), 987s C2405 (987s Clover Bar) | 915L/Cloverbar: CT/CVT/SA Doble and CDS35/CDS36/CDS7 Disconnect Maintenance and Relay Maintenance | |
| ALTALINK, EPCOR | 15-Jun-26 09:30 | 19-Jun-26 17:00 | 4.31 Days
Continuous |
915L (38s East Edmonton - 987s Clover Bar) | 915L/Cloverbar: CT/CVT/SA Doble and CDS35/CDS36/CDS7 Disconnect Maintenance and Relay Maintenance | |
| ALTALINK, EPCOR | 15-Jun-26 09:30 | 20-Jun-26 17:00 | 5.31 Days
Continuous |
1139L (367s Harry Smith - EP Riverview), RW2405 (EP Riverview), RW2403 (EP Riverview) | Riverview: 1139L Zone Doble and RWDS6/RWDS9/RWSA12 Disconnect Maintenance and RW2403/RW2405 (SF6) Breaker Maintenance | |
| ALTALINK, EPCOR | 15-Jun-26 09:30 | 20-Jun-26 17:00 | 5.31 Days
Continuous |
1139L (367s Harry Smith - EP Riverview) | Riverview: 1139L Zone Doble and RWDS6/RWDS9/RWSA12 Disconnect Maintenance and RW2403/RW2405 (SF6) Breaker Maintenance | |
| ATCO | 16-Jun-26 09:00 | 25-Jun-26 17:00 | 9.33 Days
Continuous |
972s 240kV Bus 900BS2 (972s Tinchebray) | Connect new 9L86 to 972S and prepare to energize. String Conductors/OPGW 9L86 from Str #3 to substation A-frame deadends and connect to 9L86D1, coordinate with AML conductor jumpers and OPGW termination at the TFO boundary 9L86 Str 409 Complete protection commissioning |
|
| EPCOR | 17-Jun-26 07:00 | 24-Jun-26 17:00 | 7.42 Days
Continuous |
987s GT3 (987s Clover Bar) | maintenance | |
| ATCO | 18-Jun-26 09:30 | 19-Jun-26 17:30 | 1.33 Days
Continuous |
801s 902 (801s Anderson) | BREAKER MIN OIL HLR COMPLETE TESTING | |
| EPCOR | 22-Jun-26 07:00 | 25-Jun-26 17:00 | 3.42 Days
Continuous |
987s GT1 (987s Clover Bar) | maintenance | |
| EPCOR | 22-Jun-26 07:00 | 28-Jun-26 17:00 | 6.42 Days
Continuous |
52s T1 (52s East Industrial) | East Industrial: TX1 Doble | |
| SUNCOR | 22-Jun-26 08:00 | 28-Jun-26 20:00 | 6.5 Days
Continuous |
29PL9-17 (29EDD-1 Millennium - 29EDD-94 Voyageur) | 29EDD1;29PT419 / 29PL9-17 SYSTEM;PM 5y,10y; 29PL9-17 Powerline & OHSW repairs |
|
| ATCO | 22-Jun-26 09:00 | 26-Jun-26 16:00 | 4.29 Days
Continuous |
969s 701T (969s Lindbergh) | total station outage to replace failing HO/XO bushings on transformer, updates to anti-islanding RAS logic and alarming, replace NGR resistor and relay |
|
| ALTALINK, EPCOR | 22-Jun-26 09:30 | 27-Jun-26 17:00 | 5.31 Days
Continuous |
921L (71s Lamoureux - 987s Clover Bar), 987s C2404 (987s Clover Bar), 987s C2406 (987s Clover Bar) | 921L/Cloverbar: CT/CVT/SA Doble and CDS9/CDS14/CDS17 Disconnect Maintenance and C2404 (Min Oil) Breaker Maintenance and C2401 Relay Maintenance | |
| ALTALINK, EPCOR | 22-Jun-26 09:30 | 27-Jun-26 17:00 | 5.31 Days
Continuous |
921L (71s Lamoureux - 987s Clover Bar) | 921L/Cloverbar: CT/CVT/SA Doble and CDS9/CDS14/CDS17 Disconnect Maintenance and C2404 (Min Oil) Breaker Maintenance and C2401 Relay Maintenance | |
| SUNCOR | 29-Jun-26 08:00 | 02-Jul-26 19:00 | 3.46 Days
Continuous |
29PL9-16 (29EDD-1 Millennium - 29EDD-94 Voyageur) | 29EDD1;29PT418/29PL9-16 SYSTEM;PM 5y,10y |
|
| ATCO | 29-Jun-26 13:00 | 30-Jun-26 17:00 | 28 Hours
Continuous |
9LA93 (973s Lanes Lake - 9L93 tap) | Line to Ground Clearance Mitigation, Span 50-51. Repair deficiency on structure 57 | |
| ATCO, SUNCOR | 03-Jul-26 08:00 | 09-Jul-26 20:00 | 6.5 Days
Continuous |
29PL9-1 (29EDD-1 Millennium - 848s Ruth Lake), 29EDD-1 29EDD1s452 (29EDD-1 Millennium) | 29EDD1;29CVT-3 SYSTEM;PM 5y,10y; 29EDD1;29EDD1S452 MAINT&TEST;PM 10y; 29EDD1;29CVT-3 SYSTEM;PM 5y,10y; 29PL9-1 Str#5 vibration damper |
|
| EPCOR | 06-Jul-26 07:00 | 12-Jul-26 17:00 | 6.42 Days
Continuous |
987s T2 (987s Clover Bar), 987s CC721 (987s Clover Bar), 987s C2406 (987s Clover Bar), 987s C2410 (987s Clover Bar) | Cloverbar: TX2 Doble and CDS1/CDS31/CDS33/CDS43 Disconnect Maintenance and Measurements w/Engineering | |
| ATCO | 06-Jul-26 10:00 | 07-Jul-26 16:00 | 30 Hours
Continuous |
825s 901 (825s Whitefish Lake) | BREAKER MAINTENANCE | |
| ATCO | 08-Jul-26 10:00 | 09-Jul-26 16:00 | 30 Hours
Continuous |
825s 902 (825s Whitefish Lake) | BREAKER MAINTENANCE | |
| ENMAX, ALTALINK | 10-Jul-26 08:00 | 10-Jul-26 16:00 | 8 Hours
Continuous |
37.82L (74s Janet - SS-37) | Shield Wire Replacement. | |
| ATCO, SUNCOR | 10-Jul-26 08:00 | 16-Jul-26 20:00 | 6.5 Days
Continuous |
29PL9-2 (29EDD-1 Millennium - 848s Ruth Lake), 29EDD-1 29EDD1s152 (29EDD-1 Millennium) | 29EDD1;29CVT-1 SYSTEM;PM 5y,10y | |
| EPCOR | 13-Jul-26 07:00 | 19-Jul-26 17:00 | 6.42 Days
Continuous |
EP 803s L2401 (EP 803s Lambton) | Lambton: L2401 (Min Oil) Breaker Maintenance and CT Doble | |
| EPCOR | 13-Jul-26 07:00 | 18-Sep-26 17:00 | 67.42 Days
Continuous |
805s T3 (805s Jasper), EP 805s J2404 (EP 805s Jasper), EP 805s J2405 (EP 805s Jasper) | Jasper: J2402/JAB3/JDS9 Replacement LCR | |
| ATCO | 13-Jul-26 10:00 | 14-Jul-26 16:00 | 30 Hours
Continuous |
825s 903 (825s Whitefish Lake) | BREAKER MAINTENANCE | |
| ENMAX, ALTALINK | 15-Jul-26 08:00 | 15-Jul-26 16:00 | 8 Hours
Continuous |
1064L (74s Janet - 102s Langdon) | Shield Wire Replacement. | |
| ENMAX, ALTALINK | 15-Jul-26 08:00 | 15-Jul-26 16:00 | 8 Hours
Continuous |
1065L (74s Janet - 102s Langdon) | Shield Wire Replacement. | |
| SUNCOR | 15-Jul-26 08:00 | 25-Jul-26 20:00 | 10.5 Days
Continuous |
29EDD-2 29PT-3 (29EDD-2 Tar Island), 29PL6-22 (29EDD-1 Millennium - 29EDD-2 Tar Island) | 29EDD2;29PT-3, 29PL6-22 SYSTEM;PM 5y,10y |
|
| ALTALINK | 15-Jul-26 10:00 | 15-Jul-26 14:00 | 4 Hours
Continuous |
250p 1 (250p Bighorn Plant) | maintenance | |
| ATCO | 15-Jul-26 10:00 | 16-Jul-26 16:00 | 30 Hours
Continuous |
825s 904 (825s Whitefish Lake) | BREAKER MAINTENANCE | |
| ALTALINK | 16-Jul-26 10:00 | 16-Jul-26 14:00 | 4 Hours
Continuous |
250p 2 (250p Bighorn Plant) | maintenance | |
| ATCO, SUNCOR | 17-Jul-26 08:00 | 23-Jul-26 20:00 | 6.5 Days
Continuous |
6L32 (29EDD-1 Millennium - 737s ATC Horseshoe), 29EDD-1 29EDD1S28 (29EDD-1 Millennium), 29EDD-1 29PS-197 (29EDD-1 Millennium) | 29EDD1;29CVT-6 SYSTEM;5y,10y; 29EDD1s28 Alignment Issues; 29PS-197 Paddle Rotation |
|
| EPCOR | 20-Jul-26 07:00 | 26-Jul-26 17:00 | 6.42 Days
Continuous |
EP 803s L2402 (EP 803s Lambton) | Lambton: L2402 (Min Oil) Breaker Maintenance and CT Doble | |
| ALTALINK, TRANSALTA | 20-Jul-26 08:00 | 23-Jul-26 17:00 | 3.38 Days
Continuous |
179s 733 (179s Gleichen), 428s 733X (428s Namaka), 733L (179s Gleichen - 428s Namaka) | Interphase spacers str: 181, 193, 195, 196
Repair conductor with sleeve or preform splice: 181,193, 195, 196 Str change: 211 (foundation in concrete) arm/insulator change str: 161, 163, 165 " |
|
| ALTALINK | 20-Jul-26 09:30 | 20-Jul-26 15:00 | 5.5 Hours
Continuous |
138s 2552 (138s Windy Flats), 603L (138s Windy Flats - 243s Soderglen) | Job Scope: We need to complete maintenance on 243s138DS1 | |
| ATCO | 20-Jul-26 10:00 | 21-Jul-26 16:00 | 30 Hours
Continuous |
825s 905 (825s Whitefish Lake) | BREAKER MAINTENANCE | |
| ATCO | 20-Jul-26 10:00 | 22-Jul-26 12:00 | 2.08 Days
Continuous |
804s 702 (804s Wintering Hills), 7L85 (804s Wintering Hills - 7LA85 tap) | BREAKER SF6 GL312 TESTING - 702 @ 804S | |
| ALTALINK | 20-Jul-26 13:30 | 23-Jul-26 17:30 | 3.17 Days
Continuous |
245s 777X (245s Seebe), 777L (48s Pocaterra - 245s Seebe) | 245s777X 138kV CT replacement | |
| ALTALINK | 20-Jul-26 14:00 | 27-Jul-26 13:30 | 6.98 Days
Continuous |
63s 452 (63s Red Deer) | 63s452 Breaker Replacement.
Outage to be expanded to include line to eliminate LOA hazard with overhead line while lifting breaker onto structure. Grounds will remain installed during transfer of GOI to include the overhead line. Associated request for the expanded outage #26-10198 |
|
| ATCO | 21-Jul-26 08:00 | 22-Jul-26 17:00 | 1.38 Days
Continuous |
7L65 (709s Vegreville - 7LA65 tap), 7L65 (710s Vermilion - 7LA65 tap), 7LA65 (708s Grizzly Bear - 7L65 tap) | Switch Repairs, 7LA65D1 | |
| ATCO, OWF2 | 22-Jul-26 12:00 | 24-Jul-26 17:30 | 2.23 Days
Continuous |
804s 703 (804s Wintering Hills), 7L153 (609s Wheatland - 804s Wintering Hills) | BREAKER SF6 GL312 TESTING - 703 @ 804S | |
| SUNCOR | 24-Jul-26 08:00 | 06-Aug-26 20:00 | 13.5 Days
Continuous |
29EDD-34 29PT-341 (29EDD-34), 29EDD-34 29-952-142 (29EDD-34), 29EDD-34 29-952-143 (29EDD-34), 29EDD-34 29-652-10200T (29EDD-34), 29EDD-34 29-652-10301 (29EDD-34), 29EDD-34 29-652-10302 (29EDD-34), 29EDD-34 29-652-10303 (29EDD-34), 29EDD-34 29PS-0375 (29EDD-34), 29EDD-34 29PS-0380 (29EDD-34), 29EDD-34 29PS-0381 (29EDD-34), 29EDD-34 29PS-0383 (29EDD-34), 29EDD-34 29PS-609 (29EDD-34) | 10 year PM on 29EDD34;29PT-341 system and 5 year, 10 year PM on 29EDD34;29PP-103 system |
|
| SUNCOR | 25-Jul-26 08:00 | 31-Jul-26 20:00 | 6.5 Days
Continuous |
29PL9-3 (29EDD-1 Millennium - 29EDD-3), 29EDD-3 29PT-6 (29EDD-3) | 29EDD1;29CVT-4 SYSTEM;PM 5y,10y; |
|
| ALTALINK, TRANSALTA | 27-Jul-26 08:00 | 30-Jul-26 17:00 | 3.38 Days
Continuous |
179s 733 (179s Gleichen), 428s 733X (428s Namaka), 733L (179s Gleichen - 428s Namaka) | Interphase spacers str: 181, 193, 195, 196
Repair conductor with sleeve or preform splice: 181,193, 195, 196 Str change: 211 (foundation in concrete) arm/insulator change str: 161, 163, 165 " |
|
| ALTALINK, EPCOR | 27-Jul-26 09:30 | 31-Jul-26 17:00 | 4.31 Days
Continuous |
909L (310p Sundance - 665s Dome), 665s D2403 (665s Dome) | 909LW/Dome: CVT/SA Doble and DDS6/DDS7/DDS14 Disconnect Maintenance and 909LW Relay Maintenance | |
| ALTALINK, EPCOR | 27-Jul-26 09:30 | 31-Jul-26 17:00 | 4.31 Days
Continuous |
310p 1352 (310p Sundance), 310p 1452 (310p Sundance), 909L (310p Sundance - 665s Dome) | 909LW/Dome: CVT/SA Doble and DDS6/DDS7/DDS14 Disconnect Maintenance and 909LW Relay Maintenance | |
| ATCO | 27-Jul-26 10:00 | 31-Jul-26 17:30 | 4.31 Days
Continuous |
801s 901T (801s Anderson), 801s 704 (801s Anderson), 7L85 (801s Anderson - ATC 803s Bullpound) | PRC-005 - SPR TESTING - TRANSFORMER 901T @ 801S Replace X3 Bushing on 901T at 801s Anderson TRANSFORMER CLASS1 MAJOR TESTING - 901T @ 801S TRANSFORMER CLASS1 TAP CHANGER - 901T @ 801S BREAKER MIN OIL HLR PARTIAL TESTING - 704 @ 801S |
|
| ALTALINK | 27-Jul-26 14:00 | 30-Jul-26 16:00 | 3.08 Days
Continuous |
63s 452 (63s Red Deer), 1083L (63s Red Deer - 288s Wolf Creek) | 63s452 Breaker Replacement.
Expanding outage to include line to eliminate LOA hazard with overhead line while lifting breaker onto structure. Grounds will remain installed during transfer of GOI to include the overhead line. Associated request for previous outage #26-101157 |
|
| ALTALINK | 29-Jul-26 23:30 | 30-Jul-26 02:30 | 3 Hours
Continuous |
62s 1 (62s Brazeau Plant) | maintenence | |
| ALTALINK | 30-Jul-26 03:30 | 30-Jul-26 06:30 | 3 Hours
Continuous |
62s 2 (62s Brazeau Plant) | maintenence | |
| ALTALINK | 06-Aug-26 07:00 | 06-Aug-26 18:00 | 11 Hours
Daily |
237s 2352 (237s Foothills), 237s 2652 (237s Foothills), 237s T2 (237s Foothills), 237s 240kV Bus 2 (237s Foothills) | Install bus support piles for new 240kV Bay. | |
| ALTALINK | 07-Aug-26 07:00 | 07-Aug-26 18:00 | 11 Hours
Daily |
237s 2152 (237s Foothills), 237s 2452 (237s Foothills), 237s T1 (237s Foothills), 237s 240kV Bus 1 (237s Foothills) | Install bus support piles for new 240kV Bay. | |
| SUNCOR | 07-Aug-26 08:00 | 20-Aug-26 20:00 | 13.5 Days
Continuous |
29EDD-34 29PT-340 (29EDD-34) | 29EDD34;29PT-340 SYSTEM;PM 5y,10y; 29EDD34;29PP-102 SYSTEM;PM 5y,10y |
|
| EPCOR | 10-Aug-26 07:00 | 16-Aug-26 17:00 | 6.42 Days
Continuous |
665s T3 (665s Dome), 665s D721 (665s Dome), 665s D2404 (665s Dome), S721 (Strathcona) | DS26/Dome/Strathcona: Dome TX3 Doble and DAB3/DDS15/DDS16 Disconnect Maintenance and Strathcona DS26/CVT Doble and SDS3 Disconnect Maintenance | |
| ALTALINK | 10-Aug-26 09:30 | 13-Aug-26 17:00 | 3.31 Days
Continuous |
702L (137s Sedgewick - 757s Battle River) | Interphase spacers and pole replacements | |
| ATCO | 10-Aug-26 10:00 | 13-Aug-26 16:30 | 3.27 Days
Continuous |
7L702 (137s Sedgewick - 757s Battle River) | Interphase spacers and pole replacements | |
| ATCO | 10-Aug-26 10:00 | 14-Aug-26 17:30 | 4.31 Days
Continuous |
959s SVC (959s Lanfine) | DFR Upgrade / Replacement SVC Transformer Maintenance Fire system inspection Install Blocking Switches Mechanical Maintenance & Capital BATTERY CHARGER COMPLETE TESTING @ LANFINE 959S SVC DC MOTOR |
|
| ALTALINK, EPCOR | 17-Aug-26 09:30 | 22-Aug-26 17:00 | 5.31 Days
Continuous |
920L (71s Lamoureux - 557s Castle Downs), 557s CD2405 (557s Castle Downs), 557s CD2404 (557s Castle Downs) | 920LE/Castledowns: CT/CVT Doble and Surge Arrestor LCR | |
| ATCO | 17-Aug-26 10:00 | 20-Aug-26 16:30 | 3.27 Days
Continuous |
7L702 (137s Sedgewick - 757s Battle River) | Interphase spacers and pole replacements | |
| ALTALINK | 17-Aug-26 10:00 | 20-Aug-26 16:30 | 3.27 Days
Continuous |
702L (137s Sedgewick - 757s Battle River) | Interphase spacers and pole replacements | |
| ALTALINK, ATCO, FMGW | 18-Aug-26 08:00 | 19-Aug-26 17:00 | 1.38 Days
Continuous |
964AL (1024s Granlea - 964L tap), 1024s PT-6001 (1024s Granlea), 1024s PT-6002 (1024s Granlea), 1024s 952-600001 (1024s Granlea), 1024s PS-6005 (1024s Granlea), 1024s PS-6006 (1024s Granlea), 1024s PS-6007 (1024s Granlea), 1024s PS-6008 (1024s Granlea), 1024s 489-600201 (1024s Granlea) | maintenance activities (testing and inspection) of electrical equipment | |
| EPCOR, ALTALINK | 31-Aug-26 07:00 | 13-Sep-26 17:00 | 13.42 Days
Continuous |
EP 803s T3 (EP 803s Lambton), EP 803s L2403 (EP 803s Lambton), EP 803s L2405 (EP 803s Lambton), EP 803s L721 (EP 803s Lambton), 72LS24 (EP 803s Lambton - Strathcona), 72LH8 (EP 803s Lambton - EP Hardisty), H726 (EP Hardisty), S724 (Strathcona) | Lambton: LDS14 LCR and L721 Breaker Maintenance (Min Oil) and TX3 Zone Doble and L2405 Breaker Maintenance (SF6) and LDS12 Drive Pipe Repair and TX3 Relay Maintenance | |
| EPCOR | 07-Sep-26 07:00 | 11-Sep-26 17:00 | 4.42 Days
Continuous |
987s GT2 (987s Clover Bar) | Cloverbar: | |
| ATCO | 08-Sep-26 10:00 | 10-Dec-26 16:00 | 93.29 Days
Continuous |
2015s 902 (2015s Yeo) | Remove circuit breaker for use at 2102S Armistead. New breaker to be installed at 2015S Yeo substation once received from manufacturer. | |
| ALTALINK | 08-Sep-26 23:00 | 09-Sep-26 07:00 | 8 Hours
Continuous |
250p 2 (250p Bighorn Plant) | Fall Leakage Test | |
| ALTALINK | 09-Sep-26 07:00 | 10-Sep-26 07:00 | 24 Hours
Continuous |
250p 1 (250p Bighorn Plant) | Fall Leakage Test | |
| EPCOR | 14-Sep-26 07:00 | 21-Sep-26 17:00 | 7.42 Days
Continuous |
987s GT3 (987s Clover Bar) | Cloverbar: | |
| ALTALINK, EPCOR | 14-Sep-26 09:30 | 17-Sep-26 17:00 | 3.31 Days
Continuous |
920L (37s North Calder - 557s Castle Downs), 557s CD2401 (557s Castle Downs), 557s CD2403 (557s Castle Downs) | 920LW/Castledowns: Surge Arrestor LCR | |
| ATCO, ALTALINK | 14-Sep-26 10:00 | 28-Sep-26 17:30 | 14.31 Days
Continuous |
840s 901T (840s McNeill Station), 830L (562s Cypress - 840s McNeill Station), 840s 701 (840s McNeill Station), 840s 901 (840s McNeill Station) | Replace 901T bushings 901T Oil Leak Absorption Repairs At 840s McNeill |
AB-SK |
| ALTALINK | 15-Sep-26 09:30 | 24-Sep-26 17:00 | 9.31 Days
Continuous |
618s 725 (618s Riverbend), 725AL (618s Riverbend - 725L tap), 725L (111s Coalbanks - 725AL tap), 725L (674s Bowron - 725AL tap) | Outage required to replace 674s12-Disconnect Switch and 674sPT5-CVT | |
| ALTALINK | 16-Sep-26 23:30 | 17-Sep-26 02:30 | 3 Hours
Continuous |
62s 1 (62s Brazeau Plant) | maintenence | |
| ALTALINK | 17-Sep-26 03:30 | 17-Sep-26 06:30 | 3 Hours
Continuous |
62s 2 (62s Brazeau Plant) | maintenence | |
| EPCOR | 21-Sep-26 07:00 | 03-Oct-26 17:00 | 12.42 Days
Continuous |
987s CCP7213 (987s Clover Bar), 987s CCP7214 (987s Clover Bar), 987s C2401 (987s Clover Bar), 987s C2403 (987s Clover Bar), 987s T1 (987s Clover Bar) | Cloverbar: C2401/C2403 Breaker Maintenance and CT Doble and CDS19 LCR and C2401 Relay Maintenance | |
| EPCOR | 21-Sep-26 07:00 | 30-Oct-26 17:00 | 39.42 Days
Continuous |
EP 805s J2405 (EP 805s Jasper) | Jasper: J2405 Replacement LCR | |
| ATCO | 21-Sep-26 10:00 | 24-Sep-26 16:00 | 3.25 Days
Continuous |
888s 906 (888s Dover) | 21B/9L74 relay replacement. Cutover breaker and CT to new protection | |
| EPCOR | 22-Sep-26 07:00 | 25-Sep-26 17:00 | 3.42 Days
Continuous |
987s GT1 (987s Clover Bar), 987s SST2 (987s Clover Bar), 987s CS2 (987s Clover Bar), 987s CGB1 (987s Clover Bar), 987s CCP7214 (987s Clover Bar), 987s CC24 (987s Clover Bar), 987s CH724 (987s Clover Bar), 987s CK726 (987s Clover Bar), 987s 72kV Bus 4 (987s Clover Bar) | Cloverbar: , SST2, BUS 4 Outage. CDS18 Disconnect Replacement | |
| ALTALINK | 22-Sep-26 08:00 | 22-Sep-26 18:00 | 10 Hours
Continuous |
608AL (528s Blue Trail Wind Farm - 608L tap) | Removing D608BL conductors from existing str 608AL32 for salvage. Adding new 608AL32A.
|
|
| ALTALINK | 24-Sep-26 08:00 | 24-Sep-26 18:00 | 10 Hours
Continuous |
138s 2552 (138s Windy Flats), 603L (138s Windy Flats - 243s Soderglen) | Removing D603AL conductors from existing str 603L97 for salvage. Replacing 603L98.
|
|
| ATCO | 25-Sep-26 10:00 | 28-Sep-26 16:00 | 3.25 Days
Continuous |
888s 905 (888s Dover) | 21B/9L74 relay replacement. Cutover breaker and CT to new protection | |
| Lethbridge | 28-Sep-26 09:00 | 15-Oct-26 17:00 | 17.33 Days
Continuous |
674s 1 (674s Bowron), 725LW (674s Bowron - 725BL tap) | Line outage required on 725LW at 674s to replace 674s1-Manual Airbreak Switch and replace 674s2 and 674s6 PT's | |
| ALTALINK, Lethbridge | 28-Sep-26 10:00 | 15-Oct-26 17:00 | 17.29 Days
Continuous |
15s 725 (15s Fort Macleod), 725BL (240s McBride Lake - 725L tap), 725L (15s Fort MacLeod - 725BL tap), 725L (674s Bowron - 725BL tap) | Outage required to replace 674s1-Disconnect Switch, 674sPT4-CVT, 674sPTB2-3phase CVT's, new screw piles and structure for 674sPTB2-CVT's | |
| EPCOR | 05-Oct-26 07:00 | 18-Oct-26 17:00 | 13.42 Days
Continuous |
CV5 (EP 511s Victoria - 557s Castle Downs) | CV5: Manhole Inspections and Maintenance | |
| ALTALINK | 05-Oct-26 08:30 | 28-Nov-26 06:30 | 53.96 Days
Continuous |
62s 2 (62s Brazeau Plant) | maintenence | |
| ATCO | 05-Oct-26 10:00 | 08-Oct-26 16:00 | 3.25 Days
Continuous |
9L74 (888s Dover - 960s Birchwood Creek) | 21B/9L74 relay three terminal line testing | |
| ATCO | 12-Oct-26 10:00 | 15-Oct-26 16:00 | 3.25 Days
Continuous |
888s 906 (888s Dover) | 21A/9L74 relay replacement. Cutover breaker and CT to new protection | |
| ATCO | 16-Oct-26 10:00 | 19-Oct-26 16:00 | 3.25 Days
Continuous |
888s 905 (888s Dover) | 21B/9L74 relay replacement. Cutover breaker and CT to new protection | |
| ALTALINK | 19-Oct-26 07:00 | 20-Oct-26 18:00 | 1.46 Days
Continuous |
237s 2352 (237s Foothills), 237s 2652 (237s Foothills), 237s T2 (237s Foothills), 237s 240kV Bus 2 (237s Foothills) | Closing Open Point 'C' | |
| EPCOR | 19-Oct-26 07:00 | 30-Oct-26 17:00 | 11.42 Days
Continuous |
814s T1 (814s Bellamy), BR721 (Rossdale), 814s B2401 (814s Bellamy), 814s B2407 (814s Bellamy) | Bellamy: TX1 LTC Monitor Install | |
| ALTALINK, EPCOR | 19-Oct-26 09:30 | 25-Oct-26 17:00 | 6.31 Days
Continuous |
908L (89s Ellerslie - 816s Petrolia), 816s P2401 (816s Petrolia), 816s P2406 (816s Petrolia) | Petrolia: 908LE Surge Arrestor and CVT LCR | |
| ALTALINK | 21-Oct-26 07:00 | 22-Oct-26 18:00 | 1.46 Days
Continuous |
237s 2152 (237s Foothills), 237s 2452 (237s Foothills), 237s T1 (237s Foothills), 237s 240kV Bus 1 (237s Foothills), 1141L (1172s Laramide - 237s Foothills) | Closing Open Points 'A' & 'B' | |
| ALTALINK, EPCOR | 26-Oct-26 07:00 | 30-Oct-26 17:00 | 4.42 Days
Continuous |
909L (89s Ellerslie - 665s Dome), 665s D2401 (665s Dome), 665s D2404 (665s Dome), 72DS26 (665s Dome - Strathcona) | 909LE/Dome: Dome CVT LCR and 909LE Metering Upgrade | |
| ATCO | 26-Oct-26 10:00 | 29-Oct-26 16:00 | 3.25 Days
Continuous |
9L74 (888s Dover - 960s Birchwood Creek) | 21B/9L74 relay three terminal line testing | |
| ATCO, ALTALINK | 26-Oct-26 10:00 | 02-Nov-26 16:00 | 7.29 Days
Continuous |
7L230 (69s North Barrhead - 888AL tap), 7L230 (743s Sarah Lake - 888AL tap) | Replace 7L230D1 disconnect switch | |
| ALTALINK | 28-Oct-26 10:00 | 28-Oct-26 14:00 | 4 Hours
Continuous |
250p 1 (250p Bighorn Plant) | maintenance | |
| ALTALINK | 29-Oct-26 10:00 | 29-Oct-26 14:00 | 4 Hours
Continuous |
250p 2 (250p Bighorn Plant) | maintenance | |
| ATCO | 30-Oct-26 10:00 | 02-Nov-26 17:00 | 3.33 Days
Continuous |
7L238 (959s Lanfine - 601s Bufallo Bird), 959s 708 (959s Lanfine), 959s 707 (959s Lanfine) | Cutover CT/PT ccts, Commission new RAS A-B/7L238, end-to-end testing with 601S Buffalo Bird | |
| EPCOR | 02-Nov-26 07:00 | 06-Nov-26 17:00 | 4.42 Days
Continuous |
EP 805s J2407 (EP 805s Jasper) | Jasper: J2407 Replacement LCR | |
| EPCOR | 02-Nov-26 07:00 | 13-Nov-26 17:00 | 11.42 Days
Continuous |
814s T2 (814s Bellamy), BR722 (Rossdale), 814s B2402 (814s Bellamy), 814s B2406 (814s Bellamy) | Bellamy: TX2 LTC Monitor Install | |
| ALTALINK | 05-Nov-26 03:30 | 05-Nov-26 06:30 | 3 Hours
Continuous |
62s 1 (62s Brazeau Plant) | maintenence | |
| ALTALINK, EPCOR | 06-Nov-26 07:00 | 27-Nov-26 17:00 | 21.42 Days
Continuous |
1045L (EP 805s Jasper - 1045AL tap), EP 805s J2407 (EP 805s Jasper), EP 805s J2406 (EP 805s Jasper), EP 805s J2401 (EP 805s Jasper), 1098L (EP 805s Jasper - Poundmaker) | 1045L/1098L/Jasper: J2407 Replacement LCR and Line Drop Repair (Aerial) | |
| EPCOR | 09-Nov-26 07:00 | 11-Dec-26 17:00 | 32.42 Days
Continuous |
52s T2 (52s East Industrial), 52s E2402 (52s East Industrial) | East Industrial: TX2 Bushing Replacement | |
| EPCOR | 09-Nov-26 07:00 | 11-Dec-26 17:00 | 32.42 Days
Continuous |
PM2405 (Poundmaker) | Poundmaker: P2405 Breaker Replacement | |
| ATCO | 09-Nov-26 10:00 | 12-Nov-26 17:00 | 3.29 Days
Continuous |
9L24 (946s Oakland - 959s Lanfine), 959s 906 (959s Lanfine), 959s 905 (959s Lanfine), 946s 902 (946s Oakland), 946s 903 (946s Oakland) | Cutover Bkr/MOD status, Commission new LTO/RAS 204 A/B - Lanfine/Oakland | |
| ATCO | 13-Nov-26 10:00 | 14-Nov-26 17:00 | 31 Hours
Continuous |
959s 901T (959s Lanfine), 959s 904 (959s Lanfine), 959s 919 (959s Lanfine), 959s 701 (959s Lanfine), 959s 706 (959s Lanfine) | Cutover MOD status, Commission inputs to RAS 204 A/B | |
| ATCO | 23-Nov-26 10:00 | 23-Nov-26 17:00 | 7 Hours
Continuous |
959s 904 (959s Lanfine) | Cutover and Commission Bkr 904 status to RAS 204 A/B | |
| ATCO | 24-Nov-26 10:00 | 24-Nov-26 17:00 | 7 Hours
Continuous |
959s 919 (959s Lanfine) | Cutover and Commission Bkr 919 status to RAS 204 A/B | |
| ATCO | 25-Nov-26 10:00 | 25-Nov-26 17:00 | 7 Hours
Continuous |
959s 920 (959s Lanfine) | Cutover and Commission Bkr 919 status to RAS 204 A/B | |
| EPCOR | 27-Nov-26 07:00 | 18-Dec-26 17:00 | 21.42 Days
Continuous |
EP 805s J2407 (EP 805s Jasper) | Jasper: J2407 Replacement LCR | |
| ALTALINK | 16-Dec-26 10:00 | 16-Dec-26 14:00 | 4 Hours
Continuous |
250p 1 (250p Bighorn Plant) | maintenance | |
| ALTALINK | 17-Dec-26 10:00 | 17-Dec-26 14:00 | 4 Hours
Continuous |
250p 2 (250p Bighorn Plant) | maintenance | |
| ALTALINK | 23-Dec-26 23:30 | 24-Dec-26 02:30 | 3 Hours
Continuous |
62s 1 (62s Brazeau Plant) | maintenence | |
| ALTALINK | 24-Dec-26 03:30 | 24-Dec-26 06:30 | 3 Hours
Continuous |
62s 2 (62s Brazeau Plant) | maintenence | |
| EPCOR | 04-Jan-27 07:00 | 12-Feb-27 17:00 | 39.42 Days
Continuous |
EP 805s J2401 (EP 805s Jasper) | Jasper: J2401 Replacement LCR | |
| ATCO | 09-Feb-27 09:00 | 11-Feb-27 17:00 | 2.33 Days
Continuous |
7L228 (845s Big Mountain - 7L20 tap) | AESO project P2716 - Install 7L228 bypass to facilitate the installation of new line switches for the new 7LA228 T-tap line connection to the new 2103S Pakenham substation Open 7L228, replace structures 551 and 551A, connect bypass. |
|
| EPCOR | 15-Feb-27 07:00 | 19-Feb-27 17:00 | 4.42 Days
Continuous |
EP 805s J2403 (EP 805s Jasper) | Jasper: J2403 Replacement LCR | |
| EPCOR, ALTALINK | 19-Feb-27 07:00 | 05-Mar-27 17:00 | 14.42 Days
Continuous |
EP 805s J2404 (EP 805s Jasper), EP 805s J2403 (EP 805s Jasper), EP 805s J2408 (EP 805s Jasper), 805s C1 (805s Jasper), 1044L (EP 805s Jasper - 816s Petrolia) | 1044L/Jasper: J2403 Replacement LCR | |
| EPCOR | 05-Mar-27 07:00 | 26-Mar-27 17:00 | 21.38 Days
Continuous |
EP 805s J2403 (EP 805s Jasper) | Jasper: J2403 Replacement LCR | |
| ATCO | 08-Mar-27 10:00 | 17-Mar-27 17:00 | 9.25 Days
Continuous |
9L24 (946s Oakland - 959s Lanfine), 959s 906 (959s Lanfine), 959s 905 (959s Lanfine), 946s 902 (946s Oakland), 946s 903 (946s Oakland) | Replace A/B protection relays at 959S Lanfine and 946S Oakland Cut in and reroute 9L24 Connect new 9LA24 T-tap Commission Telecom and Protection to new 1072S Rose Lynn substation |
|
| ATCO | 16-Mar-27 09:00 | 18-Mar-27 17:00 | 2.33 Days
Continuous |
7L228 (845s Big Mountain - 7L20 tap) | AESO project P2716 - Disconnect bypass, connect new 7LA228D1 to 7LA228 Str #2, connect 7L228 to 7L228D2, connect 7L228 to 7L228D3. Renumber existing line switches 7L228D2 - D4, 7L228D3 - D5, 7L228D4 - D6 Commission DTT from Pakenham to Big Mountain |
|
| ATCO | 22-Mar-27 09:00 | 25-Mar-27 17:00 | 3.33 Days
Continuous |
2091s 704 (2091s Thornton) | AESO project P2716 - cut over new SEL 2440 wiring at 2091S, relay programming, commission DTT and LTO from 2103S Pakenham | |
| ATCO | 26-Mar-27 09:00 | 29-Mar-27 17:00 | 3.33 Days
Continuous |
740s 704 (740s H.R. Milner), 7L20 (740s H.R. Milner - 810s Dome Cutbank) | AESO project P2716 - cut over RAS #171 wiring at 740S, relay programming, commission LTO 7L20/7L228 | |
| SUNCOR | 06-Apr-27 09:00 | 16-Apr-27 20:00 | 10.46 Days
Continuous |
29EDD-34 29PT-112 (29EDD-34), 29EDD-34 29-752-121 (29EDD-34), 29EDD-34 29PS-68 (29EDD-34), 29EDD-34 29PS-67 (29EDD-34), 29EDD-34 29PS-66 (29EDD-34), 29EDD-34 29PS-65 (29EDD-34), 29EDD-34 29PS-225 (29EDD-34), 29EDD-34 29PS-230 (29EDD-34), 29EDD-34 29-952-141 (29EDD-34), 29EDD-34 29-952-131 (29EDD-34), 29EDD-34 29-952-111 (29EDD-34) | 29EDD34;29PT-112 & 29PP-24 SYSTEM;PM This will Place 29EDD-34 on one 260 kV bus and drop 29PL7-1 |
|
| ATCO | 12-Apr-27 10:00 | 19-Apr-27 17:00 | 7.29 Days
Continuous |
7L22 (790s Poplar Hill - 7L88 tap) | Cut open 7L22, connect new line section to new 2061S Dobbs 7L22/21B relay upgrades at 790S Poplar Hill and 811S Clairmont Lake On completion energize new 2061S Dobbs substation |
|
| SUNCOR | 14-Apr-27 14:00 | 23-Apr-27 18:00 | 9.17 Days
Continuous |
29EDD-65 29PT-0257 (29EDD-65), 29EDD-65 29-952-4812 (29EDD-65), 29EDD-65 29-952-4813 (29EDD-65), 29EDD-71 752-4624 (29EDD-71), 29EDD-71 752-4623 (29EDD-71), 29PL7-4 (29EDD-65 - 29EDD-71) | Firebag: 29EDD65;29PT-257 & 29PL7-4 SYSTEM, 29EDD65 ;29PT-260 & 29PL7-4 SYSTEM, 29EDD71 29PT-241 & 29PL7-4 | |
| ATCO | 03-May-27 09:00 | 17-May-27 17:30 | 14.35 Days
Continuous |
2075s T11 (2075s Newell) | Annual EATL outage at 2075s & 2029s. | |
| ATCO | 03-May-27 09:00 | 17-May-27 17:30 | 14.35 Days
Continuous |
2029s T11 (2029s Heathfield) | Annual EATL outage at 2075s & 2029s. | |
| ATCO | 03-May-27 09:00 | 17-May-27 17:30 | 14.35 Days
Continuous |
13L50 (2029s Heathfield - 2075s Newell) | Annual EATL outage at 2075s & 2029s. **1218 IS NOT THE ISOALTION. ATCO SENT AESO OF REQUIRED ISOLATIONS BACK IN MAY 2024 TO UPDATE 2029S AND 2075S ISOLATIONS FOR 13L50 OUTAGES** |
|
| ATCO | 03-May-27 10:00 | 06-May-27 17:00 | 3.29 Days
Continuous |
7L22 (811s Clairmont Lake - 7L88 tap) | 7L22/21B relay upgrade at 811S Clairmont Lake Upon completion new 2061S Dobbs substation ready to energize |
|
| SUNCOR | 04-May-27 09:00 | 14-May-27 20:00 | 10.46 Days
Continuous |
29EDD-34 29PS-214 (29EDD-34), 29EDD-34 29-952-113 (29EDD-34), 29EDD-34 29PS-215 (29EDD-34), 29EDD-34 29PS-213 (29EDD-34) | 29EDD34;29PL9-13 SYSTEM;PM 5y,10y | |
| SUNCOR | 05-May-27 14:00 | 14-May-27 18:00 | 9.17 Days
Continuous |
29EDD-65 29PT-0236 (29EDD-65), 29EDD-65 29-952-4823 (29EDD-65), 29EDD-65 29-952-4822 (29EDD-65), 29EDD-71 752-4634 (29EDD-71), 29EDD-71 752-4633 (29EDD-71), 29PL7-3 (29EDD-65 - 29EDD-71) | Firebag: 29EDD65;29PT-236 & 29PL7-3 SYSTEM, 29EDD65;29PT-250&29PL7-3 SYSTEM, 29PT-246 SYSTEM;29EDD71 | |
| ATCO | 10-May-27 10:00 | 11-May-27 17:00 | 31 Hours
Continuous |
7L03 (749s Flyingshot Lake - 7L09 tap) | Cutover and commission RAS analogs and LTO to 790S Poplar Hill RAS Hub | |
| ATCO | 12-May-27 10:00 | 13-May-27 17:00 | 31 Hours
Continuous |
7L03 (731s Elmworth - 7L09 tap) | Cutover and commission LTO to 790S Poplar Hill RAS Hub | |
| ATCO | 14-May-27 10:00 | 15-May-27 17:00 | 31 Hours
Continuous |
7L69 (731s Elmworth - 815s Goodfare) | Cutover and commission LTO to 790S Poplar Hill RAS Hub | |
| ATCO | 16-May-27 10:00 | 17-May-27 17:00 | 31 Hours
Continuous |
7L07 (790s Poplar Hill - 815s Goodfare) | Cutover and commission LTO to 790S Poplar Hill RAS Hub | |
| SUNCOR | 01-Jun-27 08:00 | 10-Jun-27 17:00 | 9.38 Days
Continuous |
635EDD-1000 635-752-635PT-1000 (635EDD-1000), 635EDD-1000 635PT-1000 (635EDD-1000) | FH - Maintenance on Transformer, associated breakers, other equipment in isolation boundary and protection system testing. | |
| SUNCOR | 01-Jun-27 09:00 | 11-Jun-27 20:00 | 10.46 Days
Continuous |
29EDD-94 407T (29EDD-94 Voyageur), 29EDD-94 29-952-9705 (29EDD-94 Voyageur), 29EDD-94 29PS-393 (29EDD-94 Voyageur), 29EDD-94 29PS-392 (29EDD-94 Voyageur), 29EDD-94 29-952-9704 (29EDD-94 Voyageur), 29EDD-94 29PS-400 (29EDD-94 Voyageur) | 29EDD94;29PT-407 SYSTEM;PM 5y,10y | |
| SUNCOR | 11-Jun-27 08:00 | 20-Jun-27 17:00 | 9.38 Days
Continuous |
635EDD-1000 635-752-635PT-1001 (635EDD-1000), 635EDD-1000 635PT-1001 (635EDD-1000) | FH - Maintenance on Transformer, associated breakers, other equipment in isolation boundary and protection system testing. | |
| SUNCOR | 15-Jun-27 09:00 | 25-Jun-27 20:00 | 10.46 Days
Continuous |
29EDD-94 406T (29EDD-94 Voyageur), 29EDD-94 29-952-9702 (29EDD-94 Voyageur), 29EDD-94 29PS-388 (29EDD-94 Voyageur), 29EDD-94 29PS-389 (29EDD-94 Voyageur), 29EDD-94 29PS-399 (29EDD-94 Voyageur) | 29EDD94;29PT-406 SYSTEM;PM 5y,10y | |
| ATCO | 20-Jul-27 08:00 | 21-Jul-27 17:00 | 1.38 Days
Continuous |
7L53 (706s Irish Creek - 7LA53 tap), 7LA53 (969s Lindbergh - 7L53 tap), 7L53 (700s Bonnyville - 7LA53 tap) | Cold Lake Area Project to connect 1064s | |
| ATCO | 22-Jul-27 08:00 | 25-Jul-27 17:00 | 3.38 Days
Continuous |
7L91 (715s Leming Lake - 826s Marguerite Lake) | Cold Lake Area Energy Centre Project |
|
| ALTALINK, ATCO, FMGW | 17-Aug-27 08:00 | 18-Aug-27 17:00 | 1.38 Days
Continuous |
964AL (1024s Granlea - 964L tap), 1024s PT-6001 (1024s Granlea), 1024s PT-6002 (1024s Granlea), 1024s 952-600001 (1024s Granlea), 1024s PS-6005 (1024s Granlea), 1024s PS-6006 (1024s Granlea), 1024s PS-6007 (1024s Granlea), 1024s PS-6008 (1024s Granlea), 1024s 489-600201 (1024s Granlea) | maintenance activities (testing and inspection) of electrical equipment | |
| ATCO | 08-Nov-27 09:00 | 11-Nov-27 17:00 | 3.33 Days
Continuous |
ALC02L (409s Shell Scotford - 879s Upgrader) | Install new Deadend corner structure on ALC02L | |
| ATCO | 08-Nov-27 09:00 | 11-Nov-27 17:00 | 3.33 Days
Continuous |
ALC01L (408s Air Liquide Scotford - 409s Shell Scotford) | Install new Deadend corner structure on ALC02L. | |
| ATCO | 06-Mar-28 10:00 | 22-Mar-28 16:00 | 16.21 Days
Continuous |
826s 903 (826s Marguerite Lake), 826s 907 (826s Marguerite Lake), 826s 901T (826s Marguerite Lake) | Expand 240kV ring bus for new 9L42 line | |
| ATCO | 13-Mar-28 10:00 | 16-Mar-28 17:00 | 3.29 Days
Continuous |
9L939 (77s Sagitawah - 809s Louise Creek) | Cut over 9L939 to temp bypass structures to allow for installation of new deadend corner towers. These are required to make the final connections to the new 2105S Jackson substation | |
| ATCO | 17-Mar-28 10:00 | 17-Apr-28 17:00 | 31.29 Days
Continuous |
9L938 (77s Sagitawah - 809s Louise Creek) | Install foundations (TBD assume concrete), assemble and erect new Q-towers 9L938/9L939-155A and 9L938/9L939-156A in existing ROW centreline. Daily outage until such a time as the new towers begin to encroach on 9L938. | |
| ATCO | 18-Apr-28 10:00 | 25-Apr-28 17:00 | 7.29 Days
Continuous |
9L938 (77s Sagitawah - 809s Louise Creek) | Open 9L938 conductors, complete assembly and connect to the new Q-Towers 9L938/9L939-155A and 9L938/9L939-156A, string to 2105S Jackson deadend and terminate. Relabel 9L938 segment from 809S Louise Creek to 2105S Jackson to 9L140. |
|
| ATCO | 01-May-28 10:00 | 04-May-28 17:00 | 3.29 Days
Continuous |
9L939 (77s Sagitawah - 809s Louise Creek) | Disconnect 9L939 conductors from temp structure 9L939 -155A - 155E reconnect to existing structures 9L938/9L939-156 and 9L938/9L939-155, connect to the new Q-Towers 9L938/9L939-155A and 9L938/9L939-156A, string to 2105S Jackson deadend and terminate. Relabel 9L939 segment from 809S Louise Creek to 2 |
|
| ATCO | 08-May-28 09:00 | 10-Jul-28 17:00 | 63.33 Days
Continuous |
959s 240kV Bus 900BS2 (959s Lanfine) | GOI on 9L141 until line terminated into 1162S Fair Acres and ready to energize | |
| ATCO | 08-May-28 09:00 | 10-Jul-28 17:00 | 63.33 Days
Continuous |
959s 240kV Bus 900BS2 (959s Lanfine) | GOI on 902/903 until line terminated and 1162S Fair Acres ready to energize | |
| ATCO | 09-May-28 10:00 | 13-May-28 17:00 | 4.29 Days
Continuous |
9L02 (809s Louise Creek - 813s Little Smoky) | Install concrete foundations for new structures 9L02/320A, 320H in preparation to cut into 9L02 and convert to a t-tap. | |
| ATCO | 15-May-28 09:00 | 17-May-28 17:00 | 2.33 Days
Continuous |
959s 240kV Bus 900BS1 (959s Lanfine) | Connect new bus from new 902B to existing switch 901A to add new line 9L141, Cutover and commission 900PT1 ccts to new 9L141 relays |
|
| ATCO | 18-May-28 09:00 | 20-May-28 17:00 | 2.33 Days
Continuous |
959s 240kV Bus 900BS2 (959s Lanfine) | Connect new bus from new Bkr 903 to existing switch 903B to add new line 9L141, Cutover and commission 900PT2 ccts to new 9L141 relays |
|
| ATCO | 29-May-28 09:00 | 08-Jun-28 17:00 | 10.33 Days
Continuous |
9L24 (946s Oakland - 959s Lanfine) | Cutover and commission 905/906 CT's, 9L24PT ccts to new RAS 241 SEL 451A/B relays @ 959S Lanfine and update relay settings for RAS 241 and SCADA inputs @946S Oakland. | |
| ATCO | 19-Jun-28 10:00 | 30-Jun-28 16:00 | 11.25 Days
Continuous |
9L20 (755s Cordel - 766s Nevis) | Install concrete foundations at 9L20 Structure 69 for new T-Tap connection |
|
| ATCO | 26-Jun-28 10:00 | 10-Jul-28 17:00 | 14.29 Days
Continuous |
9L02 (809s Louise Creek - 813s Little Smoky) | Cut into 9L02 and connect new t-tap structures for 9LA02. 9L02-21A and 21B relay upgrades at 809S Louise Creek and 813S Little Smoky. Implement RAS Energize new line 9LA02 and 884S Magpie substation (UK Solar LS1) |
|
| ATCO | 31-Jul-28 10:00 | 15-Aug-28 16:00 | 15.25 Days
Continuous |
766s 901 (766s Nevis), 9L20 (755s Cordel - 766s Nevis), 755s 906 (755s Cordel), 755s 901 (755s Cordel) | Cutover new 9L20 line section, terminate 9LA20 at customer substation. Install new line protection relays |
| AB-BC, AB-SK & AB-MATL: refer to AESO web posting: | http://itc.aeso.ca/itc/public/atc |
| Also, | |
| AB-BC, AB-SK & AB-MATL: refer to ISO Rule 203.6: | http://www.aeso.ca/rulesprocedures/18592.html |
| Prepared On: | 2026-02-26 12:38:35 |
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This document and the information contained herein are based upon information and data which by their nature contain a degree of uncertainty and are subject to change. In addition, this document may contain information and data from public sources and/or third parties, which have been assumed to be accurate and complete and have not been verified. Accordingly, the Independent System Operator, operating as the Alberta Electric System Operator (the "AESO") makes no warranty, representation or guarantee, express or implied, with respect to this document or the information contained herein, including, but not limited to, any warranty, representation or guarantee of accuracy, completeness, timeliness, reliability, availability, absence of computer virus, non- infringement, merchantability or suitability for any purpose. Under no circumstances will the AESO, its members, officers, employees, contractors or agents, or any of their respective affiliates, be liable for any errors or omissions in, or any losses, damages or claims whatsoever, whether in contract, tort or otherwise, arising from use of or reliance upon, this document or any information contained herein. © 2009 Alberta Electric System Operator. All rights reserved |