Alberta Electric System Operator
System Co-ordination Plan
2026-11-05 to 2026-11-13
Approved Outages

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From To Owner Type Element Scheduled Activity Date/Time Comments Interconnection
26-Jul-24 10:00 30-Jun-27 16:00 ATCO Outage 826s 504R (826s Marguerite Lake) emergency removal to replace failed 502R @834S 25,662 Hours
Continuous		  
27-Nov-25 09:30 27-Nov-27 17:30 ALTALINK TE 89s Protection & Control (89s Ellerslie) DSP card replacements on1057L B87/L3 and B240B1 B87/240B1 17,528 Hours
Daily		  
06-Mar-26 18:00 13-Nov-26 18:00 EPCOR Outage T1 (Woodcroft) woodcroft: TX1 LCR civil 6,048 Hours
Continuous		  
10-Mar-26 10:00 30-Nov-26 18:00 ATCO TE 743s RTU/SCADA (743s Sarah Lake) throughout the course of the project, different apparatus are being replaced, RTU will be blocked prior to download 6,368 Hours
Continuous		  
01-May-26 17:00 19-Feb-27 18:00 EPCOR Outage T1 (Meadowlark) T1 LCR civil work 4,993 Hours
Continuous		  
04-Jun-26 07:01 10-Feb-27 18:00 EPCOR Outage T1 (Rossdale) rossdale: TX1 lcr civil 6,034.98 Hours
Continuous		  
07-Jun-26 17:05 31-Mar-27 18:00 ACCIONA, ENBRIDGE, ICPCL Outage 139s C1 (139s Hillridge) forced outage 7,128.92 Hours
Continuous		  
08-Jun-26 07:00 15-Jan-27 18:00 EPCOR TE EP 511s Protection & Control (EP 511s Victoria) 72kV breaker fail protection blocking 2,626 Hours
Continuous		  
15-Jun-26 07:00 19-Mar-27 17:00 EPCOR TE 805s Protection & Control (805s Jasper) protection blocking, breaker replacement project 1,954 Hours
Continuous		  
19-Jun-26 17:00 01-May-27 17:00 EPCOR Outage EP 511s Victoria T3 (EP 511s Victoria) emergency outage due to degraded asset condition 12,769 Hours
Continuous		  
20-Jul-26 07:00 31-Dec-26 18:00 EPCOR TE Protection & Control (Woodcroft) woodcroft: protection blocking for TX1 LCR, line protection testing, and repairs 3,947 Hours
Continuous		  
02-Sep-26 07:00 11-Nov-26 15:00 ALTALINK, TRANSALTA Outage 320p GT3 (320p Keephills) maintenance 1,184 Hours
Continuous		  
08-Sep-26 07:00 18-Dec-26 18:00 EPCOR TE EP 803s Protection & Control (EP 803s Lambton) protection blocking, DFR upgrade cutovers and commissioning 2,435 Hours
Continuous		  
08-Sep-26 08:00 13-Nov-26 18:00 ALTALINK, REDDEER Outage 464L (87s Gaetz - 209s Timberlands), 209s 464E (209s Timberlands) P&C panel replacements, 138 kV bus and line arrestor testing, transformer testing 1,594 Hours
Continuous		  
08-Sep-26 09:00 13-Nov-26 18:00 ALTALINK, REDDEER Outage 768L (209s Timberlands - 217s North Red Deer), 209s T1 (209s Timberlands), 217s 768 (217s North Red Deer), 209s 768W (209s Timberlands) P&C panel replacements, 138 kV bus and line arrestor testing, transformer testing 1,593 Hours
Continuous		  
12-Sep-26 08:00 10-Dec-26 17:00 SUNCOR Outage 29EDD-18 29PT-100 (29EDD-18 Firebag) replace secondary cables on 29PT-100 1,833 Hours
Continuous		  
14-Sep-26 08:00 17-Dec-26 18:00 ATCO TE 738s RTU/SCADA (738s Virginia Hills), 738s Protection & Control (738s Virginia Hills) SCADA/protection upgrade at 738s Virginia Hills, cut over to the new SCADA system and tested 2,266 Hours
Continuous		  
14-Sep-26 21:53 01-Jan-27 00:59 NWE Outage 2375 (NWE Marias) breaker hydraulic oil pump repeatedly 2,595.1 Hours
Continuous		 AB-MATL
15-Sep-26 11:00 05-Nov-26 20:00 ATCO TE 888s RTU/SCADA (888s Dover) RTU updates for 9L74 protection upgrade 1,233 Hours
Continuous		  
21-Sep-26 10:00 27-Nov-26 14:00 ATCO Outage 706s 701T (706s Irish Creek), 706s 701 (706s Irish Creek) breaker, transformer and voltage regulator maintenance 268 Hours
Continuous		  
28-Sep-26 07:00 31-Dec-26 18:00 EPCOR Outage 816s T1 (816s Petrolia) emergency outage - tap changer gassing 2,267 Hours
Continuous		  
04-Oct-26 12:00 06-Nov-26 19:00 ENMAX Outage 8.6TR (SS-8) fire alarm system upgrade 799 Hours
Continuous		  
05-Oct-26 08:00 28-Nov-26 20:00 ALTALINK Outage 62s T2 (62s Brazeau Plant), 62s 2 (62s Brazeau Plant) maintenance 1,295 Hours
Continuous		  
11-Oct-26 08:00 23-Nov-26 17:00 ENMAX Outage 32.1TR (SS-32) oil containment replacement 1,041 Hours
Continuous		  
12-Oct-26 07:00 05-Nov-26 19:00 ALTALINK TE 304s RTU/SCADA (304s Shell Limestone) RTU configuration update 588 Hours
Daily		  
13-Oct-26 09:00 18-Dec-26 19:00 ALTALINK Outage 799L (235s Entwistle - 443s South Mayerthorpe), 235s 799N (235s Entwistle) rebuild structure and restring OPGW 1,594 Hours
Continuous		  
15-Oct-26 08:00 16-Nov-26 16:00 ENMAX Outage 5.7TR (SS-5) 25kV Bus. pull in 25kV feeder cables. ground 25kV Bus 368 Hours
Continuous		  
16-Oct-26 08:00 05-Nov-26 18:00 ATCO, ALTALINK RB 12L41 (510s Sunnybrook - 939s Livock) installing replacement corona rings on 12L41 due to failure 490 Hours
Continuous		  
16-Oct-26 08:00 05-Nov-26 18:00 ATCO, ALTALINK RB 12L41 (510s Sunnybrook - 939s Livock) installing replacement corona rings on 12L41 due to failure 490 Hours
Daily		  
18-Oct-26 16:00 09-Nov-26 15:00 ALTALINK IO 38s T8 (38s East Edmonton), 38s 4852 (38s East Edmonton) T8 install, close 38s open point G 527 Hours
Continuous		  
21-Oct-26 08:00 09-Nov-26 17:00 Syncrude Outage T1 (Aurora), 260kV Bus 1 (Aurora), 211 (Aurora), 221 (Aurora), 72 kV Bus 1 (Aurora), 89-210 (Aurora), 21 (Aurora), 31 (Aurora), 11 (Aurora), 89-51 (Aurora) 6yr pm 345 Hours
Continuous		  
21-Oct-26 08:00 09-Nov-26 17:00 Syncrude Outage UT2 (Aurora), 22 (Aurora), 21 (Aurora), 89-25 (Aurora) zone 9 6yr pm 417 Hours
Continuous		  
21-Oct-26 12:00 30-Nov-26 17:00 ALTALINK, Lethbridge RB 725LW (674s Bowron - 725BL tap), 725LE (674s Bowron - 725AL tap) ongoing CVT issue and the transient voltages observed at the relays (forced) 965 Hours
Continuous		  
22-Oct-26 13:00 31-Dec-27 18:00 ALTALINK, Keyera Cynthia Outage 359s T2 (359s Esso West Pembina), 359s 14 (359s Esso West Pembina) T2 maintenance 10,445 Hours
Continuous		  
26-Oct-26 04:00 11-Dec-26 18:00 EPCOR Outage 814s T2 (814s Bellamy), BR722 (Rossdale), 814s B2402 (814s Bellamy), 814s B2406 (814s Bellamy), R721 (Rossdale), RR723 (Rossdale), 814s BAB2 (814s Bellamy) Bellamy: TX2 emergency bushing replacement and rossdale TX1 installation 1,283 Hours
Continuous		  
26-Oct-26 07:00 18-Dec-26 18:00 EPCOR Outage 805s T3 (805s Jasper), EP 805s J2404 (EP 805s Jasper), EP 805s J2405 (EP 805s Jasper), EP 805s JAB3 (EP 805s Jasper) Jasper: J2404/JAB3/JDS9 replacement LCR 1,283 Hours
Continuous		  
26-Oct-26 08:00 13-Nov-26 18:00 ATCO Outage 806s 701T (806s Oldman River), 806s 152 (806s Oldman River), 806S 52-1 (806s Oldman River), 806S 52-2 (806s Oldman River), 806S 89AS (806s Oldman River) telecommunications upgrade 442 Hours
Continuous		  
26-Oct-26 08:00 13-Nov-26 18:00 ATCO TE 806s RTU/SCADA (806s Oldman River), 806s Protection & Control (806s Oldman River) telecommunications upgrade, new UPS upgrades SCADA will be down most of the time as well 442 Hours
Continuous		  
26-Oct-26 08:00 05-Nov-26 17:00 ALTALINK TE 562s Protection & Control (562s Cypress) protection outages to implement/test fault reporting settings changes 249 Hours
Daily		  
26-Oct-26 08:00 05-Nov-26 17:00 ALTALINK TE 562s RTU/SCADA (562s Cypress) RTU outage to implement fault reporting settings changes 249 Hours
Daily		  
26-Oct-26 08:00 05-Nov-26 17:00 ALTALINK TE 194s RTU/SCADA (194s South Red Deer) 194s SCADA equipment upgrade 249 Hours
Daily		  
26-Oct-26 08:00 06-Nov-26 15:00 CMH TE MH-60L (MHS-5 NE Crescent Heights - MHS-7 Brier Park) maintenance on the relay LDR-60L-A at Northeast Crescent Heights (NECH) substation 271 Hours
Continuous		  
26-Oct-26 08:00 13-Nov-26 17:00 ALTALINK TE 312s Protection & Control (312s Fidler) ATCO is performing a UPS swap at 806s 441 Hours
Continuous		  
28-Oct-26 08:00 06-Nov-26 17:00 SUNCOR TE 29EDD-34 RTU/SCADA (29EDD-34), 29EDD-1 RTU/SCADA (29EDD-1 Millennium) change few setting/ parameter configuration for Alberta DST changes and download again 57 Hours
Continuous		  
28-Oct-26 09:00 10-Nov-26 20:00 SUNCOR Outage 29EDD-34 260kV Bus 29PP-45 (29EDD-34), 29EDD-34 29-952-113 (29EDD-34), 29EDD-34 29-952-123 (29EDD-34), 29EDD-34 29-952-143 (29EDD-34), 29EDD-34 29-952-133 (29EDD-34) 29EDD34 29PP45 A,C phase rebuild bus and supports that were removed as part of the 29PT-224 outage.
 155 Hours
Continuous		  
01-Nov-26 09:00 14-Nov-26 17:00 ENMAX TE Protection & Control (SS-37) 37 sub auto switching protection scheme outage, 37 sub switch replacements, settings upgrade 320 Hours
Daily		  
01-Nov-26 09:30 14-Nov-26 17:00 ENMAX, ALTALINK Outage 37.82L (74s Janet - SS-37), 37.2TR (SS-37), 74s 37.82W (74s Janet), 37B138-37.82 (SS-37), 37B138-BT5 (SS-37) maintenance 293.5 Hours
Continuous		  
01-Nov-26 09:30 14-Nov-26 17:00 ENMAX, ALTALINK Outage 37.82L (74s Janet - SS-37), 74s 37.82W (74s Janet) ENMAX Work - HV SW replacement. 37SW85, 37SW86, 37SW89 322 Hours
Continuous		  
02-Nov-26 08:00 13-Nov-26 18:00 ALTALINK, EPCOR Outage 909L (310p Sundance - 665s Dome), 665s D2403 (665s Dome), 310p 1352 (310p Sundance), 310p 1452 (310p Sundance), 665s DDS14 (665s Dome) metering upgrade cutovers and commissioning 274 Hours
Continuous		  
02-Nov-26 08:00 06-Nov-26 18:00 EPCOR Outage EP 803s T2 (EP 803s Lambton), EP 803s L2402 (EP 803s Lambton), EP 803s L2405 (EP 803s Lambton), EP 803s LAB2 (EP 803s Lambton) TX2 zone, DFR cutovers and commissioning 106 Hours
Continuous		  
02-Nov-26 08:00 12-Nov-26 18:00 ALTALINK TE 353s RTU/SCADA (353s Plamondon) RTU outage for sublan upgrade project 250 Hours
Daily		  
02-Nov-26 08:00 07-Nov-26 18:00 EPCOR Outage EP 511s Victoria T3 (EP 511s Victoria), EP 511s V724 (EP 511s Victoria), EP 511s V725 (EP 511s Victoria), EP 511s VAB3 (EP 511s Victoria) TX3 zone, TX LCR civil work 130 Hours
Continuous		  
02-Nov-26 08:00 13-Nov-26 18:00 EPCOR Outage 72JW19 (EP 805s Jasper - Woodcroft), T1 (Woodcroft), W721 (Woodcroft), W722 (Woodcroft) TX1 zone, LCR cutovers and commissioning 274 Hours
Continuous		  
02-Nov-26 08:00 05-Nov-26 18:00 ALTALINK RB 234L (133L tap - 505L tap), 133L (19s Wabamun - 234L tap), 234L (310p Sundance - 505L tap), 505L (234L tap - 505L tap), 522AL (868s Keephills Make-Up - 522L tap), 522L (133L tap - 522AL tap), 522L (320p Keephills - 133L tap), 522L (866s Sundance Make-Up - 522AL tap) 234L53-55 cross arm change 82 Hours
Daily		  
02-Nov-26 09:00 06-Nov-26 17:00 ENMAX Outage 31.3TR (SS-31) installation of new surge arrestors 104 Hours
Continuous		  
02-Nov-26 09:00 06-Nov-26 19:00 ALTALINK RB 472AL (221s Sunken Lake - 472L tap), 472L (213s Hughenden - 472AL tap), 472L (648s Metiskow - 472AL tap) replace arm and insulation on 472L 106 Hours
Daily		  
02-Nov-26 09:00 12-Nov-26 17:00 ALTALINK TE 353s Protection & Control (353s Plamondon) changes to substation network, including changes to IP address changes 248 Hours
Daily		  
02-Nov-26 09:00 06-Nov-26 17:00 CMH Outage MH-20L (MHS-3 Southridge - MHS-6 CMH Riverview), MH-8L (MHS-1 CMH Power Plant - MHS-6 CMH Riverview), MHS-3 MH138-T34 (MHS-3 Southridge), MHS-6 MH138-620 (MHS-6 CMH Riverview), MHS-6 MH138-621 (MHS-6 CMH Riverview), MHS-6 MH69-615 (MHS-6 CMH Riverview), MHS-6 MH69-609 (MHS-6 CMH Riverview), MHS-6 MH69-613 (MHS-6 CMH Riverview), MHS-6 MH69-610 (MHS-6 CMH Riverview), MHS-6 MH69-616 (MHS-6 CMH Riverview), MHS-6 MH69-608 (MHS-6 CMH Riverview), MHS-6 MH69-614 (MHS-6 CMH Riverview), MHS-6 MH69-611 (MHS-6 CMH Riverview), MHS-3 MH138-318 (MHS-3 Southridge), MHS-3 MH138-317 (MHS-3 Southridge), MHS-3 MH69-302 (MHS-3 Southridge) breaker and disconnect switch maintenance, breaker heater wiring 104 Hours
Continuous		  
02-Nov-26 09:00 20-Nov-26 17:00 ALTALINK TE 163s RTU/SCADA (163s Amoco Empress) SCADA configuration updates 440 Hours
Daily		  
02-Nov-26 09:00 20-Nov-26 17:00 ALTALINK TE 55s RTU/SCADA (55s Olds) 55s P&C major scope 440 Hours
Daily		  
02-Nov-26 09:00 27-Nov-26 17:00 ALTALINK TE 163s Protection & Control (163s Amoco Empress) ACC visibility upgrade 608 Hours
Daily		  
02-Nov-26 09:00 06-Nov-26 17:00 ALTALINK, BCH Outage 1L274 (48s Pocaterra - 978s BCH Britt Creek) tree removal along 1L274 BC maintenance does not affect the Alberta ATC 104 Hours
Daily		 AB-BC
02-Nov-26 09:00 27-Nov-26 17:00 ALTALINK TE 275s Protection & Control (275s Jenner) 1002L protection outages required for ACC visibility upgrades and alarm splitting 608 Hours
Daily		  
02-Nov-26 09:00 27-Nov-26 17:00 ALTALINK TE 562s Protection & Control (562s Cypress) 669L and 1011L protection outages required for ACC visibility upgrades and alarm splitting 608 Hours
Daily		  
02-Nov-26 09:00 27-Nov-26 17:00 ALTALINK TE 163s Protection & Control (163s Amoco Empress) ACC visibility upgrade 608 Hours
Daily		  
02-Nov-26 09:00 27-Nov-26 17:00 ALTALINK TE 394s Protection & Control (394s Empress) 760LN L2 protection outages required for ACC visibility upgrades and alarm splitting at 163s 608 Hours
Daily		  
02-Nov-26 10:00 06-Nov-26 19:00 ALTALINK Outage 720L (347s AML Fox Creek - 397s Benbow), 347s 720X (347s AML Fox Creek), 397s 720N (397s Benbow) line maintenance
105 Hours
Continuous		  
02-Nov-26 10:00 06-Nov-26 19:00 ATCO TE 2029s Protection & Control (2029s Heathfield) complete the EN100 firmware upgrade on the breaker fail relays
105 Hours
Continuous		  
02-Nov-26 11:00 05-Nov-26 17:00 ATCO TE 951s RTU/SCADA (951s Thickwood Hills) relay software patching 78 Hours
Continuous		  
02-Nov-26 11:00 18-Dec-26 19:00 ATCO TE 948s RTU/SCADA (948s Heatburg), 948s Protection & Control (948s Heatburg) automation upgrade/relay firmware to at 948S Heatburg, 1,112 Hours
Continuous		  
02-Nov-26 13:00 05-Nov-26 13:00 ATCO TE 740s Protection & Control (740s H.R.Milner) RTXP replacement and PRC relay testing 72 Hours
Continuous		  
02-Nov-26 14:00 06-Nov-26 17:00 Saskpower Outage SaskPower S1H maintenance 99 Hours
Continuous		 AB-SK
03-Nov-26 08:00 05-Nov-26 13:00 ATCO Outage 740s 702T (740s H.R.Milner), 740s 700 (740s H.R. Milner) PRC-005 - microprocessor relay testing
TCM program		 53 Hours
Continuous		  
03-Nov-26 09:00 05-Nov-26 17:00 ALTALINK TE 268s Protection & Control (268s Whitecourt) settings change 56 Hours
Daily		  
03-Nov-26 09:00 05-Nov-26 17:00 ALTALINK TE 268s RTU/SCADA (268s Whitecourt) RTU database update 56 Hours
Daily		  
03-Nov-26 09:00 06-Nov-26 17:00 ALTALINK, BCH TE 1201L (520s Bennett - BCH Cranbrook) protection outage and maintenance 80 Hours
Continuous		  
03-Nov-26 10:00 07-Nov-26 18:00 ALTALINK Outage 71s 240kV East Bus (71s Lamoureux), 997L (71s Lamoureux - 430s Ursus), 71s T2 (71s Lamoureux), 71s 1752 (71s Lamoureux), 71s 1452 (71s Lamoureux), 71s 1352 (71s Lamoureux), 71s 32 (71s Lamoureux) multiple switch repair/replacement and maintenance 71s36, 71s37, 71s46, 71s47 104 Hours
Continuous		  
03-Nov-26 10:00 05-Nov-26 18:00 ATCO TE 888s Protection & Control (888s Dover) block 21B/9L74 and perform breaker fail testing of adjacent breakers to 906, 902, 909 and 912 56 Hours
Continuous		  
03-Nov-26 10:00 06-Nov-26 18:00 ALTALINK, BCH RB 1201L (520s Bennett - BCH Cranbrook) need reclosing off on 5L94 for about an hour to complete testing 80 Hours
Continuous		 AB-BC
04-Nov-26 07:30 06-Nov-26 16:00 ATCO Outage 6L56 (763s Hanna - 802s Michichi Creek), 763s 601 (763s Hanna), 802s 606 (802s Michichi Creek), 802s 601B (802s Michichi Creek) structure replacement and deficiency repair 32.5 Hours
Continuous		  
04-Nov-26 08:00 05-Nov-26 16:00 ALTALINK TE 74s Protection & Control (74s Janet) PRC maintenance on 691L A&B 8 Hours
Continuous		  
04-Nov-26 08:00 04-Dec-26 18:00 EPCOR Outage 72JM18 (EP 805s Jasper - Meadowlark), M721 (Meadowlark), M722 (Meadowlark), EP 805s J722 (EP 805s Jasper), MAB1 (Meadowlark) JM18/meadowlark: meadowlark TX1 Zone, TX delivery and build 730 Hours
Continuous		  
04-Nov-26 09:00 17-Nov-26 13:00 BCH Outage 5L98 (BCH Nicola - BCH Vaseux Lake) replacement of equipment BC maintenance does not affect the Alberta ATC 316 Hours
Continuous		 AB-BC
04-Nov-26 09:00 05-Nov-26 18:00 ALTALINK TE 38s Protection & Control (38s East Edmonton) upgrade 33 Hours
Continuous		  
04-Nov-26 09:00 05-Nov-26 18:00 ALTALINK TE 71s Protection & Control (71s Lamoureux) upgrade 33 Hours
Continuous		  
04-Nov-26 09:00 05-Nov-26 17:00 ALTALINK TE 419s Protection & Control (419s Chestermere) PRC maintenance on 691L A&B, 157RAS A&B, 152 and 352 breaker fail protections 32 Hours
Daily		  
04-Nov-26 09:00 05-Nov-26 17:00 ALTALINK TE AltaLink Telecom Equipment upgrade radio hop software version to latest release 32 Hours
Daily		  
04-Nov-26 09:00 05-Nov-26 17:00 ALTALINK TE 283s Protection & Control (283s Violet Grove) replace failed protection 32 Hours
Continuous		  
04-Nov-26 09:00 05-Nov-26 17:00 ATCO RB 7L42 (716s Lloydminster - 751s Hill) repair leaning poles on 7L42 Structure 54 & 55 32 Hours
Continuous		  
04-Nov-26 09:00 06-Nov-26 17:00 ALTALINK TE 356s RTU/SCADA (356s Milo) RTU outages for testing of new alarms/status 56 Hours
Daily		  
04-Nov-26 10:00 05-Nov-26 17:00 ATCO TE 832s RTU/SCADA (832s Blumenort), ATCO Telecom Equipment swapping site networking to VPLS 11 31 Hours
Continuous		  
04-Nov-26 11:00 09-Nov-26 20:00 ATCO Outage 9L20 (755s Cordel - 766s Nevis), 766s 901 (766s Nevis) installing spacer dampers on line 129 Hours
Continuous		  
05-Nov-26 00:00 05-Nov-26 08:00 ALTALINK Outage 62s T1 (62s Brazeau Plant), 62s 1 (62s Brazeau Plant) maintenence 3 Hours
Continuous		  
05-Nov-26 07:30 05-Nov-26 13:30 ALTALINK Outage 163s 1752 (163s Amoco Empress) 11/1552 breaker fail trip testing 6 Hours
Continuous		  
05-Nov-26 08:00 05-Nov-26 18:00 ALTALINK Outage 510s 2052 (510s Sunnybrook) PRC relay mnt 0510DC ACF2 (s2052) 6MD66 CI 10 Hours
Continuous		  
05-Nov-26 08:00 06-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 2091s RTU/SCADA (2091s Thornton) Thornton_S telecom - bringing new fiber link to 845s Big Mountain on line and site switch updates 8 Hours
Continuous		  
05-Nov-26 08:00 05-Nov-26 19:00 ALTALINK Outage 723L (150s Clyde - 438s Westlock), 150s 723W (150s Clyde) replace arms and insulators on 723L str 47, 115 11 Hours
Continuous		  
05-Nov-26 08:00 05-Nov-26 19:00 ALTALINK Outage 202L (61s Lodgepole - 62s Brazeau Plant), 61s 202X (61s Lodgepole), 62s 202 (62s Brazeau Plant) 202L urgent repair 11 Hours
Continuous		  
05-Nov-26 08:00 05-Nov-26 17:00 ATCO TE 764s RTU/SCADA (764s Heisler), ATCO Telecom Equipment scheduled upgrade 9 Hours
Continuous		  
05-Nov-26 08:00 05-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 786s RTU/SCADA (786s High Level) scheduled upgrade 9 Hours
Continuous		  
05-Nov-26 08:00 05-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 787s RTU/SCADA (787s High Prairie) scheduled upgrade 9 Hours
Continuous		  
05-Nov-26 08:00 05-Nov-26 16:00 ENMAX Outage 43.2TR (SS-43) 43.2TR secondary cabinet hinge install 8 Hours
Continuous		  
05-Nov-26 08:00 05-Nov-26 18:00 EPCOR TE RTU/SCADA (University of Alberta) U of A: RTU outage 10 Hours
Continuous		  
05-Nov-26 08:00 05-Nov-26 16:00 ALTALINK TE 42s Protection & Control (42s Sarcee) 42s replace failed relay B138BN Bus Prot, protection is nonredundant will be out of service for less than 6 hours 8 Hours
Daily		  
05-Nov-26 09:00 20-Nov-26 18:00 ATCO IO ATCO EMS/ICCP Outage core switch replacement at primary control center and cisco ios firmware upgrades on cisco switches at the primary control center and secondary control center. there is no planned aeso-impacting outage associated with this activity. potential risk of service interruption. 369 Hours
Continuous		  
05-Nov-26 09:00 05-Nov-26 17:00 ALTALINK, ATCO TE 283s RTU/SCADA (283s Violet Grove), ATCO Telecom Equipment RTU database update 8 Hours
Daily		  
05-Nov-26 09:00 06-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 804s RTU/SCADA (804s Wintering Hills) SCADA work 32 Hours
Continuous		  
05-Nov-26 09:00 05-Nov-26 17:00 ALTALINK TE 51s RTU/SCADA (51s Wainwright), AltaLink Telecom Equipment perform radio maint on MDS Radio from 9465R Lougheed to 51s Wainwright 8 Hours
Daily		  
05-Nov-26 10:00 05-Nov-26 15:00 ATCO Outage 888s 912 (888s Dover) protection work 5 Hours
Continuous		  
05-Nov-26 10:00 05-Nov-26 18:00 ALTALINK, BCH Outage 887L (48s Pocaterra - 978s BCH Britt Creek), 48s 887X (48s Pocaterra) remove tree off 1L274 8 Hours
Daily		 AB-BC
06-Nov-26 07:00 06-Nov-26 18:30 ENMAX, ALTALINK Outage 240kV West Bus (SS-25), 1109L (SS-25 - SS-65), 25B240-D136 (SS-25), 25B240-D133 (SS-25), 25B240-D141 (SS-25), 25B240-D142 (SS-25), 25B240-D139 (SS-25), 25MD240-1109 (SS-25) connection return to existing cable connection for Y(B) phase 10.5 Hours
Continuous		  
06-Nov-26 07:00 06-Nov-26 17:30 ENMAX, ALTALINK IO 1109L (SS-25 - SS-65), 240kV West Bus (SS-25) Altalink outage 10.5 Hours
Continuous		  
06-Nov-26 08:00 06-Nov-26 19:00 ALTALINK Outage 202L (178s Cynthia - 202AL tap), 178s 202X (178s Cynthia) urgent repair - replace crossarms and insulators structures 11 Hours
Continuous		  
06-Nov-26 08:00 06-Nov-26 18:00 ALTALINK, EPCOR RB 1209L (89s Ellerslie - 330p Genesee) bird nest removal 10 Hours
Continuous		  
06-Nov-26 08:00 06-Nov-26 17:00 ATCO TE 917s RTU/SCADA (917s Horse River), ATCO Telecom Equipment scheduled upgrade 9 Hours
Continuous		  
06-Nov-26 08:00 06-Nov-26 17:00 ATCO TE 740s RTU/SCADA (740s H.R.Milner), ATCO Telecom Equipment scheduled upgrade 9 Hours
Continuous		  
06-Nov-26 08:00 06-Nov-26 17:00 ATCO TE 706s RTU/SCADA (706s Irish Creek), ATCO Telecom Equipment scheduled upgrade 9 Hours
Continuous		  
06-Nov-26 09:00 06-Nov-26 17:00 ALTALINK TE AltaLink Telecom Equipment, 289s RTU/SCADA (289s Saunders Lake) Telecom equipment maintenance
8 Hours
Daily		  
06-Nov-26 09:00 12-Nov-26 16:00 ENMAX Outage 7.2TR (SS-7) 7 sub Z12 bus diff replacement 176 Hours
Continuous		  
07-Nov-26 08:00 07-Nov-26 16:00 ENMAX Outage 11.82L (SS-11 - SS-14), 14.1TR (SS-14), 14.3TR (SS-14), 14.1C (SS-14), 14.2C (SS-14), 14MD138-14.1TR (SS-14), 14MD138-14.3TR (SS-14), SW83 (SS-14), 11B138-11.82 (SS-11), 14B138-11.82 (SS-14) fall substation washing, reversing switch check 8 Hours
Continuous		  
07-Nov-26 08:00 07-Nov-26 16:00 ENMAX TE RTU/SCADA (SS-54) RTU upgrade 8 Hours
Continuous		  
07-Nov-26 09:00 22-Nov-26 17:00 Syncrude Outage 1734 (Syncrude Mildred Lake), 1735 (Syncrude Mildred Lake), Mildred T17 (Syncrude Mildred Lake) complete 6-Year transformer PM on T17 in Plant 31 switchyard at Mildred Lake 368 Hours
Continuous		  
08-Nov-26 07:00 08-Nov-26 18:00 ALTALINK Outage 685L (328s Pine Creek - 1012s Deer Hill) Urgent, Replacing cross arm and insulators on structure 72 11 Hours
Continuous		  
08-Nov-26 13:00 04-Dec-26 19:00 ENMAX Outage 8.5TR (SS-8) fire alarm system upgrade 630 Hours
Continuous		  
09-Nov-26 08:00 11-Dec-26 18:00 EPCOR Outage PM2405 (Poundmaker) replace: P2405 breaker 778 Hours
Continuous		  
09-Nov-26 08:00 09-Nov-26 16:00 ENMAX Outage 28.1TR (SS-28) 28BB8-28.1TR ABB cell repair - Door/Shutter Issue 8 Hours
Continuous		  
09-Nov-26 08:00 09-Nov-26 17:00 ATCO TE ATCO Telecom Equipment Keg River_S_Telecom - both firewalls at the Keg River substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
09-Nov-26 08:00 09-Nov-26 17:00 ATCO TE 2049s RTU/SCADA (2049s Kettle River) both firewalls at the Kettle River substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
09-Nov-26 08:00 10-Nov-26 16:00 ENMAX Outage 31.1C (SS-31) capacitor bank maintenance - 31.1C 32 Hours
Continuous		  
09-Nov-26 08:00 09-Nov-26 18:00 ENMAX Outage 20.1TR (SS-20) switchgear replacement (building soffit work) 10 Hours
Continuous		  
09-Nov-26 09:00 22-Nov-26 18:00 ATCO Outage 7L90 (813s Little Smoky - 7LA90 tap) 7L90 pole replacement program 2026 - 124 structure changes (poles/arms) between strs 1 - 157 321 Hours
Continuous		  
09-Nov-26 09:00 13-Nov-26 17:00 ENMAX Outage 14.83L (SS-14 - SS-36), 14B138-14.83 (SS-14), 36B138-14.83 (SS-36) installation of new surge arrestors 104 Hours
Continuous		  
09-Nov-26 09:00 10-Nov-26 17:00 ALTALINK TE 359s RTU/SCADA (359s Esso West Pembina) T2 meter replacement configuration updates 32 Hours
Daily		  
09-Nov-26 09:00 09-Nov-26 21:00 ATCO Outage 7L03 (749s Flyingshot Lake - 7L09 tap) Changing burnt pole 16A and rotten structure 19 12 Hours
Continuous		  
09-Nov-26 09:00 11-Nov-26 20:00 ATCO RB 7L128 (802s Michichi Creek - 7LA128 tap), 7L128 (963s Coyote Lake - 7LA128 tap) installing marker cones on 7L128 at str span 85 59 Hours
Continuous		  
09-Nov-26 09:00 16-Nov-26 20:00 ATCO RB 13L50 (2029s Heathfield - 2075s Newell) installing aerial markers at following spans on both OHSW 179 Hours
Continuous		  
09-Nov-26 09:00 20-Nov-26 15:00 CMH TE MH-60L (MHS-5 NE Crescent Heights - MHS-7 Brier Park) maintenance on the relay LDR-60L-B at Northeast Crescent Heights (NECH) substation 270 Hours
Continuous		  
09-Nov-26 09:00 09-Nov-26 17:00 ALTALINK TE 216s Protection & Control (216s Knightsbridge) complete PRC maintenance 8 Hours
Daily		  
09-Nov-26 09:00 09-Nov-26 17:00 ALTALINK TE 38s Protection & Control (38s East Edmonton) maintenance on L21 A&B and 138B1 B87A, B, C protections 8 Hours
Daily		  
09-Nov-26 09:00 10-Nov-26 17:00 ALTALINK TE 277s Protection & Control (277s Hayter) standard relay maintenance 32 Hours
Daily		  
09-Nov-26 09:00 04-Dec-26 17:00 ALTALINK TE 199s Protection & Control (199s East Airdrie) protection outages - circuit cutovers and testing associated with Balzac RAS upgrades project 608 Hours
Daily		  
09-Nov-26 09:00 13-Nov-26 17:00 ALTALINK, BCH Outage 1L274 (48s Pocaterra - 978s BCH Britt Creek) tree removal along 1L274 BC maintenance does not affect the Alberta ATC 104 Hours
Daily		 AB-BC
09-Nov-26 09:00 04-Dec-26 17:00 ALTALINK TE 391s RTU/SCADA (391s Balzac) SCADA configuration updates for Balzac RAS upgrades 608 Hours
Daily		  
09-Nov-26 09:00 04-Dec-26 17:00 ALTALINK TE 64s Protection & Control (64s East Crossfield) Balzac RAS upgrades project - 752L protection outages for circuit cutovers and testing 608 Hours
Daily		  
09-Nov-26 09:00 22-Nov-26 17:00 ALTALINK TE 391s Protection & Control (391s Balzac) Balzac RAS upgrades project - protection outages for circuit cutovers and testing 320 Hours
Daily		  
09-Nov-26 09:00 13-Nov-26 17:00 ALTALINK, BCH IO 48s 887X (48s Pocaterra), 887L (48s Pocaterra - 978s BCH Britt Creek) BCH to remove a tree off 1L274. 104 Hours
Continuous		 AB-BC
09-Nov-26 09:00 13-Nov-26 17:00 ALTALINK, BCH RB 887L (48s Pocaterra - 978s BCH Britt Creek) ANRP for tree removal along 1L274 104 Hours
Daily		  
09-Nov-26 09:00 10-Nov-26 17:00 ALTALINK TE 510s RTU/SCADA (510s Sunnybrook) rewire 510s RTUs to the MPLS network 32 Hours
Continuous		  
09-Nov-26 10:00 12-Nov-26 19:00 ATCO Outage 6L56 (763s Hanna - 802s Michichi Creek), 763s 601 (763s Hanna), 802s 606 (802s Michichi Creek) structure replacement and deficiency repair 81 Hours
Continuous		  
09-Nov-26 10:00 09-Nov-26 16:00 ATCO TE 2081s RTU/SCADA (2081s Meadow Creek), ATCO Telecom Equipment 7750-2 integration, swapping site networking to VPLS 11 6 Hours
Continuous		  
09-Nov-26 10:00 10-Nov-26 19:00 ALTALINK Outage 781L (71s Lamoureux - 172s Sherritt), 71s 152 (71s Lamoureux), 71s 252 (71s Lamoureux), 172s 781W (172s Sherritt), 71s 781E (71s Lamoureux) transmission line maintenance 33 Hours
Continuous		  
09-Nov-26 10:00 10-Nov-26 16:00 ATCO TE 740s RTU/SCADA (740s H.R.Milner), ATCO Telecom Equipment H.R.Milner_S-Telecom - removal of the DJF and Aprisa radio, cut over site to new fiber link, cut over Oct 27 from 10am - 2pm 30 Hours
Continuous		  
09-Nov-26 10:00 10-Nov-26 17:00 ATCO TE ATCO Telecom Equipment Whitefsh Lake_T-Telecom- capacity & reliability upgrades 31 Hours
Continuous		  
09-Nov-26 10:00 10-Nov-26 18:00 ALTALINK, BCH RB 1201L (520s Bennett - BCH Cranbrook) need reclosing off on 5L94 for about an hour to complete testing 32 Hours
Daily		 AB-BC
09-Nov-26 10:30 10-Nov-26 18:30 ALTALINK, DOW RB 787AL (906s Ross Creek - 787L tap), 787L (166s Dow Chemical Fort Saskatchewan - 787AL tap), 787L (71s Lamoureux - 787AL tap) transmission line maintenance 32 Hours
Daily		  
09-Nov-26 11:00 11-Nov-26 16:00 ATCO RB 7L53 (700s Bonnyville - 7LA53 tap), 7L53 (706s Irish Creek - 7LA53 tap) Live line pole replacement on 7LA53 53 Hours
Continuous		  
09-Nov-26 11:00 13-Nov-26 19:00 ATCO TE 2075s Protection & Control (2075s Newell) complete firmware upgrade for the 1035L, 923L, 1087L, and 1088L protection relays
104 Hours
Continuous		  
09-Nov-26 11:00 13-Nov-26 19:00 ATCO TE 2029s Protection & Control (2029s Heathfield) complete firmware update 104 Hours
Continuous		  
09-Nov-26 13:00 20-Nov-26 14:00 ALTALINK Outage 38s T3 (38s East Edmonton), 38s T8 (38s East Edmonton), 38s 4852 (38s East Edmonton) move protections from 38s T3 to 38s T8, tie in power cables from 38s T8 to 38s1252, close 38s open point G, energize new T8, 38s SS2, & AMI, T8 to soak for 24 hours., release 38s T3 for salvage 265 Hours
Continuous		  
09-Nov-26 13:00 10-Nov-26 17:00 ALTALINK Outage 359s T2 (359s Esso West Pembina) replace T2 meter 28 Hours
Continuous		  
09-Nov-26 13:30 09-Nov-26 18:00 ALTALINK Outage 535s 6452 (535s Joffre) replace failed tank heaters 4.5 Hours
Daily		  
10-Nov-26 08:00 10-Nov-26 18:00 ALTALINK Outage 150s 723W (150s Clyde), 723L (150s Clyde - 438s Westlock) Change out strain insulators on dead end structure in 438s Westlock 10 Hours
Continuous		  
10-Nov-26 08:00 10-Nov-26 17:00 ATCO TE 856s RTU/SCADA (856s Kinosis) firewalls upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
10-Nov-26 08:00 10-Nov-26 17:00 ATCO TE 754s RTU/SCADA (754s Ksituan River) firewalls upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
10-Nov-26 09:00 11-Nov-26 17:00 ATCO Outage 7L14 (705s Kitscoty - 751s Hill) Cross arm and insulator replacement 32 Hours
Continuous		  
10-Nov-26 09:00 10-Nov-26 17:00 ALTALINK TE 370s RTU/SCADA (370s North Lethbridge) SCADA updates and alarm testing associated with T5 oil monitor install 8 Hours
Daily		  
10-Nov-26 09:00 10-Nov-26 17:00 ALTALINK Outage 384s 834 (384s Keystone), 834L (320p Keephills - 384s Keystone), 320p 834X (320p Keephills) FortisAlberta to change 25kv insulator on 834L152 underbuild. 8 Hours
Continuous		  
10-Nov-26 09:00 10-Nov-26 17:00 ALTALINK TE 33s RTU/SCADA (33s Spray) upgrading the MPLS and splitting SCADA VLAN 8 Hours
Continuous		  
10-Nov-26 09:00 10-Nov-26 17:00 ALTALINK TE 320p Protection & Control (320P Keephills) firmware upgrade on A21/L1, maintenance on sync check relays
8 Hours
Continuous		  
10-Nov-26 09:00 10-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 948s RTU/SCADA (948s Heatburg) RTU upgrade, installation of new 2Z panel and telecom cabling 8 Hours
Continuous		  
10-Nov-26 10:00 10-Nov-26 17:00 ATCO TE ATCO Telecom Equipment MPLS headend 7750 integration, site migration to VPLS 11 7 Hours
Continuous		  
10-Nov-26 11:00 21-Nov-26 17:00 ATCO Outage 7L48 (794s Valleyview - 7LA48 tap) Changing rotten poles and cross arms 270 Hours
Continuous		  
10-Nov-26 11:00 15-Nov-26 19:00 SUNCOR Outage 29PL9-12 (29EDD-34 - 29EDD-65) Firebag: Cleaning up contamination from Pad 112 blow out 300772223 128 Hours
Continuous		  
10-Nov-26 20:00 31-Mar-27 20:00 SUNCOR IO Unmodeled Transmission Facility (Suncor) station service transformer is un-modeled 3,384 Hours
Continuous		  
11-Nov-26 08:00 14-Nov-26 18:00 ATCO RB 7L760 (767s Oyen - 7LC760 tap) installing marker cones at str span 410, 411 82 Hours
Continuous		  
11-Nov-26 08:00 11-Nov-26 19:00 ALTALINK Outage 85L (35s Rundle Plant - 54L tap) 85L is open ended due to system instability during telecom outage at 35s Rundle firewall upgrade, MPLS node upgrade 11 Hours
Continuous		  
11-Nov-26 08:00 11-Nov-26 17:00 EPCOR TE EP 511s RTU/SCADA (EP 511s Victoria) RTU Outage 9 Hours
Continuous		  
11-Nov-26 08:00 11-Nov-26 18:00 ALTALINK Outage 723L (438s Westlock - 724L tap) change out dead end strain insulators at 438s Westlock 10 Hours
Continuous		  
11-Nov-26 08:00 11-Nov-26 16:00 ENMAX TE RTU/SCADA (SS-10) RTU Upgrade 8 Hours
Continuous		  
11-Nov-26 08:00 14-Nov-26 16:00 Syncrude Outage TL-1 (Aurora - Aurora), 13 (Aurora), 14 (Aurora), 89-17 (Aurora) repair cracked cross arm on TL1 power line 80 Hours
Continuous		  
11-Nov-26 09:00 11-Nov-26 18:00 ALTALINK TE AltaLink Telecom Equipment MPLS node upgrade and RAW socket conversion 9 Hours
Daily		  
11-Nov-26 09:00 13-Nov-26 17:00 ALTALINK TE 428s RTU/SCADA (428s Namaka) deficiency clean-up and site checkout for HMI replacement 56 Hours
Daily		  
12-Nov-26 08:00 16-Nov-26 16:00 ATCO, ALTALINK RB 9L950 (132s Ware Junction - 801s Anderson) installing aerial marker on 9L950 at str spans 212, 213 104 Hours
Continuous		  
12-Nov-26 08:00 12-Nov-26 18:00 ALTALINK Outage 924L (102s Langdon - 356s Milo) conductor repair 10 Hours
Continuous		  
12-Nov-26 08:00 12-Nov-26 18:00 ALTALINK RB 927L (102s Langdon - 356s Milo) urgent - 924L206 conductor repair, proximity 10 Hours
Daily		  
12-Nov-26 08:00 12-Nov-26 17:00 ATCO TE 946s RTU/SCADA (946s Oakland) maintenenance 9 Hours
Continuous		  
12-Nov-26 08:00 12-Nov-26 17:00 ATCO TE 813s RTU/SCADA (813s Little Smoky) maintenance 9 Hours
Continuous		  
12-Nov-26 08:00 12-Nov-26 17:00 ATCO TE 837s Mahihkan RTU/SCADA maintenance 9 Hours
Continuous		  
12-Nov-26 08:00 13-Nov-26 16:00 ALTALINK TE 312s Protection & Control (312s Fidler) equipment upgrade 32 Hours
Daily		  
12-Nov-26 08:00 13-Nov-26 16:00 ALTALINK, WINDYPWPL TE 112s Protection & Control (112s Windy Point) Prot outage to revert settings back to original settings. Line protections are redundant and will be removed from service one at a time. Fault clearing time without TPR for 893L will be 96 cycles 32 Hours
Daily		  
12-Nov-26 08:00 13-Nov-26 16:00 ENMAX Outage 38.1C (SS-38) capacitor bank maintenance 32 Hours
Continuous		  
12-Nov-26 08:30 12-Nov-26 17:00 ATCO Outage 7L42 (716s Lloydminster - 751s Hill) Cross arm replacement on 7L42 8.5 Hours
Continuous		  
12-Nov-26 09:00 12-Nov-26 17:00 ATCO RB 7L53 (700s Bonnyville - 7LA53 tap), 7L53 (706s Irish Creek - 7LA53 tap) live line pole replacement on 7LA53 8 Hours
Continuous		  
12-Nov-26 09:00 13-Nov-26 17:00 ALTALINK TE 535s RTU/SCADA (535s Joffre), AltaLink Telecom Equipment maintenance 32 Hours
Daily		  
12-Nov-26 09:00 12-Nov-26 19:00 ALTALINK RB 781L (71s Lamoureux - 172s Sherritt) 781L structure 10 anchor extensions 10 Hours
Daily		  
12-Nov-26 09:00 12-Nov-26 19:00 ALTALINK, DOW RB 787AL (906s Ross Creek - 787L tap), 787L (166s Dow Chemical Fort Saskatchewan - 787AL tap), 787L (71s Lamoureux - 787AL tap) 787L proximity reclose block 10 Hours
Daily		  
12-Nov-26 09:00 12-Nov-26 17:00 ALTALINK TE 132s RTU/SCADA (132s Ware Junction) SCADA metering work 8 Hours
Continuous		  
12-Nov-26 09:00 12-Nov-26 18:00 ALTALINK TE AltaLink Telecom Equipment Firewall Upgrade, MPLS Node upgrades, RAW Socket conversion. Loss of SPV to 48s, 245s, 32s, 29s for 2hrs. All other TPR circuits will be rerouted in 50ms. 9 Hours
Daily		  
12-Nov-26 09:00 14-Nov-26 19:00 ALTALINK RB 760L (163s Amoco Empress - 760AL tap) ATCO - installing marker cones at str span 410, 411 58 Hours
Continuous		  
12-Nov-26 09:00 13-Nov-26 17:00 ALTALINK TE 535s RTU/SCADA (535s Joffre), AltaLink Telecom Equipment firewall upgrade, MPLS 7705 node firmware upgrade 32 Hours
Daily		  
12-Nov-26 09:00 12-Nov-26 17:00 ALTALINK TE 38s Protection & Control (38s East Edmonton) maintenance 8 Hours
Daily		  
12-Nov-26 09:00 12-Nov-26 17:30 ATCO TE 963s Protection & Control (963s Coyote Lake) RAS setting changes 8.5 Hours
Continuous		  
12-Nov-26 09:00 21-Nov-26 17:00 ATCO TE 951s RTU/SCADA (951s Thickwood Hills), 951s Protection & Control (951s Thickwood Hills) 951S-APL firmware upgrades
224 Hours
Continuous		  
12-Nov-26 10:00 12-Nov-26 16:00 ALTALINK Outage 13L (65s High River - 392s Black Diamond) 13L-STR 31, 32 Repair stolen copper downlead.
STR 61 tighten nuts on post insulator.		 6 Hours
Continuous		  
12-Nov-26 10:00 12-Nov-26 16:00 ATCO TE 740s RTU/SCADA (740s H.R.Milner) scada outage 6 Hours
Continuous		  
13-Nov-26 07:00 16-Nov-26 18:00 ATCO TE ATCO RTU/SCADA SOC2 backup control centre activation 83 Hours
Continuous		  
13-Nov-26 08:00 19-Nov-26 18:00 EPCOR Outage EP 511s V724 (EP 511s Victoria), EP 511s V725 (EP 511s Victoria), EP 511s Victoria T3 (EP 511s Victoria) TX3 zone, TX LCR civil work 154 Hours
Continuous		  
13-Nov-26 08:00 13-Nov-26 17:00 ATCO TE 800s RTU/SCADA (800s Friedenstal), ATCO Telecom Equipment Friedenstal substation RTU upgrade 9 Hours
Continuous		  
13-Nov-26 08:00 13-Nov-26 17:00 ATCO TE 939s RTU/SCADA (939s Livock) both firewalls at the LIVOCK substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
13-Nov-26 08:00 13-Nov-26 17:00 ATCO TE 780s RTU/SCADA (780s Lubicon) both firewalls at the LUBICON substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
13-Nov-26 08:00 13-Nov-26 17:00 ALTALINK TE 87s Protection & Control (87s Gaetz) 986L and 962L 'A' protection will be removed from service to troubleshoot telecom issue with ATCO 9 Hours
Continuous		  
13-Nov-26 09:00 16-Nov-26 17:00 ATCO, ALTALINK RB 950L (132s Ware Junction - 801s Anderson) installing aerial marker on 9L950 at str spans 212, 213 80 Hours
Continuous		  
13-Nov-26 09:00 13-Nov-26 18:00 ALTALINK TE AltaLink Telecom Equipment telecom firewall upgrade, MPLS node upgrades, telecom LAN switch upgrade 9 Hours
Daily		  
13-Nov-26 09:00 20-Nov-26 17:00 ATCO TE ATCO Telecom Equipment Tinchebray_T-Telecom - troubleshooting 9L86 channel fail, 9L86 A and 9L62 A protection will be down 176 Hours
Continuous		  
13-Nov-26 13:00 18-Nov-26 19:00 SUNCOR Outage 29PL7-1 (29EDD-34 - 29EDD-85), 29EDD-34 29-752-121 (29EDD-34) replacing contaminated insulators 126 Hours
Continuous		  

Prepared On:   2026-11-04   15:52:22

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.

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