Alberta Electric System Operator
System Co-ordination Plan
2026-11-11 to 2026-11-20
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 14-Nov-26 09:30 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
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		  
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		  
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		  
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 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 13-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		  
29-Oct-26 00:00 19-Dec-26 15:00 ALTALINK Outage 1182s C1 (1182s Berland River) 1182s Berland River capacitor C1 forced outage 1,239 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 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 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 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 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 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 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		  
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 15:00 BCH Outage 5L98 (BCH Nicola - BCH Vaseux Lake) replacement of equipment BC maintenance does not affect the Alberta ATC 318 Hours
Continuous		 AB-BC
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		  
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 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 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 13-Nov-26 18:00 ENMAX Outage 20.1TR (SS-20) switchgear replacement (building soffit work) 10 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 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 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 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 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		  
10-Nov-26 00:01 29-Jan-27 11:59 ENMAX TE SS-162 PMU (SS-162 Beddington) PMU outage for replacement 1,931.97 Hours
Continuous		  
10-Nov-26 09:00 11-Nov-26 17:00 ATCO Outage 7L14 (705s Kitscoty - 751s Hill), 705s 703 (705s Kitscoty), 751s 701 (751s Hill) cross arm and insulator replacement 32 Hours
Continuous		  
10-Nov-26 11:00 21-Nov-26 17:00 ATCO Outage 7L48 (794s Valleyview - 7LA48 tap), 794s 703 (794s Valleyview) 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) 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 07:30 14-Nov-26 18:30 ALTALINK RB 760L (163s Amoco Empress - 760AL tap) ATCO - installing marker cones at str span 410, 411 83 Hours
Daily		  
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 07:00 16-Nov-26 17:00 ATCO, ALTALINK RB 950L (132s Ware Junction - 801s Anderson) installing aerial marker on 9L950 at str spans 212, 213 106 Hours
Daily		  
12-Nov-26 07:00 12-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		  
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) settings update. 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 MPLS upgrade. 9 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) repair stolen copper downlead. 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 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 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		  
14-Nov-26 08:00 14-Nov-26 19:00 ALTALINK Outage 861L (71s Lamoureux - 258s Dow Hydrocarbons) replace crossarms with post insulators and install catch arms on structure 46 & 47 11 Hours
Continuous		  
14-Nov-26 08:00 14-Nov-26 16:00 ENMAX, ALTALINK Outage 20.82L (SS-20 - SS-21), 21.80L (42s Sarcee - SS-21), 21.1TR (SS-21), 21.4TR (SS-21), 21B138-20.82 (SS-21), 21B138-21.80 (SS-21), 21MD138-21.1TR (SS-21), 21MD138-21.4TR (SS-21), 21B69-21.4TR (SS-21) fall substation washing 8 Hours
Continuous		  
14-Nov-26 08:00 17-Nov-26 19:00 ATCO, ALTALINK RB 12L70 (12s Heartland - 2029s Heathfield) replace SVDs on 12L70/85 and inspect OHSW 83 Hours
Continuous		  
14-Nov-26 08:00 17-Nov-26 19:00 ATCO, ALTALINK RB 12L85 (12s Heartland - 2029s Heathfield) replace SVDs on 12L70/85 and inspect OHSW 83 Hours
Continuous		  
14-Nov-26 08:00 14-Nov-26 16:00 ALTALINK, ENMAX IO 42s 21 (42s Sarcee), 21.80L (42s Sarcee - SS-21) fall substation washing 8 Hours
Continuous		  
14-Nov-26 08:00 14-Nov-26 16:00 ENMAX TE RTU/SCADA (SS-15) upgrade RTU 8 Hours
Continuous		  
14-Nov-26 08:00 17-Nov-26 19:00 ATCO, ALTALINK RB 12L70 (12s Heartland - 2029s Heathfield) ATCO - replace SVDs on 12L70/85 and inspect OHSW 83 Hours
Daily		  
14-Nov-26 08:00 15-Nov-26 16:00 ALTALINK TE 71s RTU/SCADA (71s Lamoureux) update RTU database 32 Hours
Daily		  
14-Nov-26 08:00 17-Nov-26 19:00 ATCO, ALTALINK RB 12L85 (12s Heartland - 2029s Heathfield) ATCO: Replace SVDs on 12L70/85 and inspect OHSW 83 Hours
Daily		  
14-Nov-26 10:00 15-Nov-26 20:00 ATCO Outage 6L12 (775s Sullivan Lake - 6L25 tap), 775s 602 (775s Sullivan Lake) structure replacements and deficiency repair 34 Hours
Continuous		  
15-Nov-26 07:30 21-Nov-26 17:00 ALTALINK, EPCOR RB 920L (71s Lamoureux - 557s Castle Downs) building new foundations 153.5 Hours
Continuous		  
15-Nov-26 07:30 21-Nov-26 17:00 ALTALINK, EPCOR Outage 71s 1552 (71s Lamoureux), 71s 1252 (71s Lamoureux), 71s 14 (71s Lamoureux), 71s T1 (71s Lamoureux), 71s 240kV West Bus (71s Lamoureux), 921L (71s Lamoureux - 987s Clover Bar) Installing new foundations 153.5 Hours
Continuous		  
15-Nov-26 07:30 21-Nov-26 17:00 ALTALINK, EPCOR IO 921L (71s Lamoureux - 987s Clover Bar) Altalink requested isolation 153.5 Hours
Continuous		  
15-Nov-26 07:30 21-Nov-26 17:00 ALTALINK, EPCOR RB 920L (71s Lamoureux - 557s Castle Downs) Altalink request - reclose block 153.5 Hours
Continuous		  
15-Nov-26 08:00 18-Nov-26 16:00 ENMAX Outage 37.81L (SS-37 - SS-38) 901 68 ST SE – Modify Trans Poles 80 Hours
Continuous		  
15-Nov-26 08:00 15-Nov-26 12:00 ENMAX Outage 24.81L (SS-24 - SS-31), 31.84L (SS-31 - SS-32), 31.3TR (SS-31), 31.2TR (SS-31), 31.1C (SS-31) Fall Substation Washing. 31.1C (SS-31) opens on loss of PT voltage 4 Hours
Continuous		  
15-Nov-26 08:30 20-Nov-26 18:00 ALTALINK, EPCOR Outage 908L (89s Ellerslie - 816s Petrolia), 816s P2401 (816s Petrolia), 816s P2406 (816s Petrolia) Petrolia: 908LE CVT LCR 129.5 Hours
Continuous		  
15-Nov-26 08:30 20-Nov-26 18:00 ALTALINK, EPCOR IO 908L (89s Ellerslie - 816s Petrolia) EPCOR 908LE CVT LCR 129.5 Hours
Continuous		  
15-Nov-26 12:00 15-Nov-26 18:00 ENMAX Outage 31.2TR (SS-31), 9.80L (SS-9 - SS-31), 31.1C (SS-31), 31.1TR (SS-31) Fall Substation Washing 6 Hours
Continuous		  
16-Nov-26 07:00 18-Dec-26 17:00 EPCOR TE Protection & Control (EPCOR Riverview) relay maintenance 778 Hours
Continuous		  
16-Nov-26 08:00 20-Nov-26 18:00 EPCOR Outage EP 803s T1 (EP 803s Lambton), EP 803s L2401 (EP 803s Lambton), EP 803s L2402 (EP 803s Lambton) Lambton: TX1 Zone, DFR Cutovers and Commissioning 106 Hours
Continuous		  
16-Nov-26 08:00 19-Nov-26 16:00 ALTALINK TE 370s Protection & Control (370s North Lethbridge) protection maintenance work 80 Hours
Daily		  
16-Nov-26 08:00 19-Nov-26 16:00 ALTALINK TE 316s RTU/SCADA (316s West Crossfield) replace desktop HMI with SMP4260, D25RTU will remain and SMP4260 will only be used as an HMI 80 Hours
Daily		  
16-Nov-26 08:00 20-Nov-26 18:00 ALTALINK TE 510s RTU/SCADA (510s Sunnybrook) RTU/HMI configuration update for RAS scheme 106 Hours
Continuous		  
16-Nov-26 08:00 06-Aug-27 17:00 EPCOR Outage T2 (Woodcroft) Woodcroft - TX2 LCR civil construction 6,321 Hours
Continuous		  
16-Nov-26 08:00 11-Dec-26 18:00 EPCOR Outage 72NW15 (Namao - Woodcroft), T2 (Woodcroft), W725 (Woodcroft), W723 (Woodcroft), N726 (Namao) Woodcroft TX2 Zone TX LCR demolition 610 Hours
Continuous		  
16-Nov-26 08:00 16-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 826s RTU/SCADA (826s Marguerite Lake) both firewalls at the Marguerite Lake substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
16-Nov-26 08:00 16-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 957s RTU/SCADA (957s McClelland) both firewalls at the McClelland substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
16-Nov-26 08:00 16-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 885s RTU/SCADA (885s McMillan) both firewalls at the McMillan substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
16-Nov-26 08:00 19-Nov-26 16:00 ALTALINK TE 216s RTU/SCADA (216s Knightsbridge) telecom development 80 Hours
Daily		  
16-Nov-26 08:00 19-Nov-26 16:00 ALTALINK TE 953s RTU/SCADA (953s Lake Louise) swapping RS416 port server during meter module replacement 80 Hours
Daily		  
16-Nov-26 08:00 16-Nov-26 16:00 ENMAX, ALTALINK RB 24.83L (74s Janet - SS-24) work on pole 8 Hours
Continuous		  
16-Nov-26 08:00 16-Nov-26 16:00 ENMAX, ALTALINK RB 24.83L (74s Janet - SS-24) work on pole 8 Hours
Continuous		  
16-Nov-26 09:00 20-Nov-26 17:00 ATCO TE 810s RTU/SCADA (810s Dome Cutbank), ATCO Telecom Equipment cut site over to new fiber link, RTU and switch updates 104 Hours
Continuous		  
16-Nov-26 09:00 20-Nov-26 17:00 ALTALINK TE AML 511s Protection & Control (AML 511s Crossings) install local push buttons and update settings to accommodate new enable / disable push buttons / remote enable / disable commands 104 Hours
Continuous		  
16-Nov-26 09:00 16-Nov-26 13:00 ENMAX, ALTALINK Outage 21.80L (42s Sarcee - SS-21), 21B138-21.80 (SS-21) Breaker Trip Circuit Test - 21B138-21.80 4 Hours
Continuous		  
16-Nov-26 09:00 20-Nov-26 14:00 CMH Outage MH-9L (MHS-2 North Industrial - MHS-10 Box Springs), MHS-2 MH69-217 (MHS-2 North Industrial), MHS-2 MH138-218 (MHS-2 North Industrial), MHS-2 MH138-219 (MHS-2 North Industrial) MH69-217, MH138-218 Breaker maintenance
MHS-2 69kV disconnect maintenance (MH138-219)
MH-9L will be isolated.		 101 Hours
Continuous		  
16-Nov-26 09:00 16-Nov-26 13:00 ENMAX Outage 65.1TR (SS-65) Tap Changer Reversing Switch Check - 65.1-TC. Oil Sampling - 65.1-TC 4 Hours
Continuous		  
16-Nov-26 09:00 22-Nov-26 19:00 ATCO Outage 6L02 (757s Battle River - 765s Mannix Mine) Salvaging double circuit 6L08 with double circuit 6L02 line between structures 1632 & 1641 then transferring 6L02 to lower arm 154 Hours
Continuous		  
16-Nov-26 09:00 17-Nov-26 17:00 ATCO TE 879s Scotford Upgrader RTU/SCADA, ATCO Telecom Equipment Vegreville_T(SCC)-Telecom- MPLS Life Cycle upgrades to SAR A. Prep on Nov 16 Cut over Nov 17 between 10am-2pm. IMPACT TO THE FOLLOWING TRAFFIC:#134 RAS A - NEVIS / HOLDEN (AML), , SCOTFORD UPGRADER SCADA, BRIDGE CREEK SUB SCADA 32 Hours
Continuous		  
16-Nov-26 09:00 17-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 738s RTU/SCADA (738s Virginia Hills) MPLS life cycle upgrades to SAR A(Type - SAR18), Node 69.1, removal of DJF, replacement of SAR A, Eth Cards, Slot 1.9/1.10
32 Hours
Continuous		  
16-Nov-26 09:00 19-Nov-26 17:00 ALTALINK TE 38s Protection & Control (38s East Edmonton) relay maintenance on 738L 77/85 A&B, 737L A&B, 822L A&B, 915L A&B and 946L A&B 80 Hours
Daily		  
16-Nov-26 09:00 18-Nov-26 17:00 ALTALINK TE 103s Protection & Control (103s Goose Lake) PRC maintenance 56 Hours
Daily		  
16-Nov-26 09:00 16-Nov-26 13:00 ENMAX, ALTALINK IO 21.80L (42s Sarcee - SS-21) Breaker Trip Circuit Test - 21B138-21.80. 4 Hours
Continuous		  
16-Nov-26 09:00 04-Dec-26 17:00 ALTALINK TE 64s RTU/SCADA (64s East Crossfield) SCADA configuration updates for Balzac RAS upgrades project 440 Hours
Daily		  
16-Nov-26 09:00 04-Dec-26 17:00 ALTALINK TE 199s RTU/SCADA (199s East Airdrie) SCADA updates for Balzac RAS upgrades project 440 Hours
Daily		  
16-Nov-26 09:00 17-Nov-26 17:00 ALTALINK Outage 364s T1 (364s Whitecourt Industrial) LA replacements 32 Hours
Continuous		  
16-Nov-26 10:00 16-Nov-26 16:00 ATCO TE 907s RTU/SCADA (907s Waddell), ATCO Telecom Equipment 7750-2 integration, swapping site networking to VPLS 11 6 Hours
Continuous		  
16-Nov-26 10:00 17-Nov-26 18:00 ALTALINK Outage 71s 452 (71s Lamoureux), 71s 352 (71s Lamoureux), 71s 787X (71s Lamoureux), 787L (71s Lamoureux - 787AL tap) 71s787X switch adjustment, transmission line maintenance 32 Hours
Continuous		  
16-Nov-26 10:00 17-Nov-26 20:00 ATCO Outage 6L12 (774s Monitor - 6L25 tap) Outage required on 6L12B between 6L12D4 (veteran) and Monitor for structure replacements & deficiency repair. 34 Hours
Continuous		  
16-Nov-26 10:00 16-Nov-26 18:00 ALTALINK Outage 71s 452 (71s Lamoureux), 71s 352 (71s Lamoureux), 787L (71s Lamoureux - 787AL tap) Replacing insulator on structure 3 8 Hours
Daily		  
16-Nov-26 10:00 27-Nov-26 18:00 ATCO TE 2029s Protection & Control (2029s Heathfield) complete the EN100 firmware update on ACF back up and aux SST protection relays 272 Hours
Continuous		  
16-Nov-26 10:00 16-Nov-26 17:00 ALTALINK TE 235s Protection & Control (235s Entwistle) relay settings change 7 Hours
Continuous		  
16-Nov-26 11:00 20-Nov-26 19:00 SUNCOR Outage 29PL9-13 (29EDD-34 - 29EDD-65) contamination clean up from Pad 112 blowout 300772224 104 Hours
Continuous		  
16-Nov-26 11:00 23-Nov-26 19:00 ATCO TE 2075s Protection & Control (2075s Newell) complete the EN100 firmware upgrade on the breaker fail relays for 904, 905, 906, 910, 911, 912, 916, 917, 918, 919, 920, 921, 922, and 923 176 Hours
Continuous		  
16-Nov-26 11:00 16-Nov-26 17:00 ALTALINK TE 165s Protection & Control (165s Gainford) relay setting change 6 Hours
Daily		  
16-Nov-26 11:00 16-Nov-26 19:00 ATCO TE ATCO Telecom Equipment, 786s RTU/SCADA (786s High Level) 1786 High Level DFR addition, requires some telecom cabling for remote access to new devices and switch updates as per LAN services 8 Hours
Continuous		  
16-Nov-26 12:00 18-Nov-26 14:00 ATCO Outage 972s 905 (972s Tinchebray), 972s 906 (972s Tinchebray) replace motor on 9L62D1 50 Hours
Continuous		  
16-Nov-26 12:00 18-Nov-26 14:00 ATCO, ALTALINK Outage 962L (87s Gaetz - 972s Tinchebray) Replace motor on 9L62D1 50 Hours
Continuous		  
16-Nov-26 12:00 19-Nov-26 18:00 ATCO RB 7L53 (700s Bonnyville - 7LA53 tap), 7L53 (706s Irish Creek - 7LA53 tap) live line pole replacement on 7LA53 78 Hours
Continuous		  
16-Nov-26 12:00 16-Nov-26 16:00 ENMAX Outage 47B138-BT3 (SS-47) breaker trip circuit test - 47B138-47BT3 4 Hours
Continuous		  
16-Nov-26 13:00 19-Nov-26 13:00 ATCO Outage 740s 705 (740s H.R. Milner), 7L80 (740s H.R. Milner - 857s Kakwa Ridge) PRC-005 - MICROPROCESSOR RELAY TESTING
TCM Program. RTXP Test Switch Mitigation and Replacement
Both RAS-A and RAS-B 7L80 will also need be OOS for the RTXP work on 21A and 21B 7L80		 72 Hours
Continuous		  
16-Nov-26 13:00 19-Nov-26 13:00 ATCO TE 740s Protection & Control (740s H.R.Milner) RTXP replacement and PRC relay testing on 7L80 relays
 72 Hours
Continuous		  
16-Nov-26 13:00 19-Nov-26 19:00 ALTALINK RB 801L (294s Brazeau Outlet Works - 801AL tap), 801AL (445s Elk River - 801L tap), 801L (358s Amoco Brazeau - 801AL tap), 801L (62s Brazeau Plant - 294s Brazeau Plant Outlet Works) 801L live line maintenance
78 Hours
Daily		  
16-Nov-26 14:00 19-Nov-26 18:00 ALTALINK Outage 251s 1452 (251s Whitla) 251s1452 Gauge replacement, HPL open close indicator replacement. PRC5 maint. 76 Hours
Continuous		  
17-Nov-26 08:00 17-Nov-26 16:00 ALTALINK TE 370s Protection & Control (370s North Lethbridge) PRC maintenance on 207L A and B protections 8 Hours
Daily		  
17-Nov-26 08:00 17-Nov-26 19:00 ALTALINK Outage 919L (77s Sagitawah - 310p Sundance) installing missing line number boards on 919L1 and installing marker cones and OHSW 11 Hours
Continuous		  
17-Nov-26 08:00 17-Nov-26 19:00 ALTALINK RB 989L (77s Sagitawah - 310p Sundance) 989L proximity RB, installing line number boards on structure 919L1 and installing marker cones 11 Hours
Continuous		  
17-Nov-26 08:00 18-Nov-26 17:30 ENMAX, ALTALINK Outage 693L (42s Sarcee - SS-10) Altalink Outage. Pump out the vaults and seal them to prevent moisture ingress. 33.5 Hours
Continuous		  
17-Nov-26 08:00 17-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 840s RTU/SCADA (840s McNeill Station) both firewalls at the McNeil substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
17-Nov-26 08:00 17-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 905s RTU/SCADA (905s Meikle) both firewalls at the Meikle substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
17-Nov-26 08:00 17-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 802s RTU/SCADA (802s Michichi Creek) both firewalls at the Michichi Creek substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
17-Nov-26 08:00 18-Nov-26 16:00 ENMAX Outage 41.1C (SS-41) capacitor bank maintenance 32 Hours
Continuous		  
17-Nov-26 08:30 20-Nov-26 18:00 ALTALINK RB 726L (37s North Calder - 71s Lamoureux) installing new foundations 81.5 Hours
Daily		  
17-Nov-26 08:30 24-Nov-26 14:00 ENMAX Outage 9.83L (SS-9 - SS-43), 43.1TR (SS-43) 43 sub pull box replacement 173.5 Hours
Continuous		  
17-Nov-26 09:00 18-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 917s RTU/SCADA (917s Horse River) Horse River_S_Telecom- upgrades to SAR A 32 Hours
Continuous		  
17-Nov-26 09:00 17-Nov-26 13:00 ENMAX Outage 2.80L (SS-2 - SS-23), 23B138-2.80 (SS-23), 2MD138-2.80 (SS-2) breaker trip circuit test 4 Hours
Continuous		  
17-Nov-26 09:00 19-Nov-26 17:00 ATCO, ALTALINK, SHELL TE 402s RTU/SCADA (402s Scotford Expansion 1) RTU database update 56 Hours
Daily		  
17-Nov-26 09:00 17-Nov-26 17:00 ALTALINK TE 534s Protection & Control (534s Eckville) through fault monitoring settings change on T1A 8 Hours
Daily		  
17-Nov-26 10:00 17-Nov-26 18:00 ALTALINK TE 38s Protection & Control (38s East Edmonton) perform CT ratio change from existing T3 1200:5 to T8 2000:5, tripping test from 138B2 A and B to 38s4852 8 Hours
Daily		  
17-Nov-26 11:00 19-Nov-26 17:00 ATCO TE 951s RTU/SCADA (951s Thickwood Hills) computer patching, may require short loss of visibility for patching 54 Hours
Continuous		  
17-Nov-26 11:00 18-Nov-26 19:00 ATCO TE 930s RTU/SCADA (930s Arcenciel) 930 Archencil sycn condenser and SVC DFR addition, requires some telecom cabling for remote access to new devices and switch updates as per LAN services 32 Hours
Continuous		  
17-Nov-26 12:00 17-Nov-26 16:00 ENMAX Outage 2.83L (SS-13 - 2.83L tap), 13B138-2.83 (SS-13) breaker trip circuit test 4 Hours
Continuous		  
18-Nov-26 08:00 24-Nov-26 18:00 EPCOR Outage 987s GT3 (987s Clover Bar), 987s CGB3 (987s Clover Bar) bus diff upgrade cutovers 370 Hours
Continuous		  
18-Nov-26 08:00 18-Nov-26 16:00 ALTALINK TE 370s Protection & Control (370s North Lethbridge) PRC maintenance on 667L A and B protections 8 Hours
Daily		  
18-Nov-26 08:00 18-Nov-26 19:00 ALTALINK Outage 3L (42s Sarcee - 272s Springbank), 42s 3W (42s Sarcee) replacing crossarms and insulators on structure 390 11 Hours
Continuous		  
18-Nov-26 08:00 19-Nov-26 18:00 ALTALINK TE 233s Protection & Control (233s Beamer) protection testing 34 Hours
Daily		  
18-Nov-26 08:00 18-Nov-26 16:00 ALTALINK TE 482s Protection & Control (482s Haynes) relay maintenance 8 Hours
Daily		  
18-Nov-26 08:00 18-Nov-26 16:00 ALTALINK TE 482s RTU/SCADA (482s Haynes) repairing failed RS400 port server which may require a supervisory push 8 Hours
Daily		  
18-Nov-26 08:00 18-Nov-26 16:00 ATCO Outage 749s 701T (749s Flyingshot Lake), 749s 706 (749s Flyingshot Lake), 749s 701 (749s Flyingshot Lake), 749s 701TD (749s Flyingshot Lake) two hot spots were identified that require immediate repair, 701T X side arrestor and 701A hinge side connection 8 Hours
Continuous		  
18-Nov-26 08:00 18-Nov-26 17:00 ATCO TE ATCO Telecom Equipment both firewalls at the Mitsue substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
18-Nov-26 08:00 18-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 774s RTU/SCADA (774s Monitor) both firewalls at the Monitor substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
18-Nov-26 08:00 19-Nov-26 17:00 ALTALINK Outage 364s T2 (364s Whitecourt Industrial) LA replacements 33 Hours
Continuous		  
18-Nov-26 09:00 19-Nov-26 17:00 ATCO, ALTALINK RB 7L199 (347s AML Fox Creek - 741s ATC Fox Creek) installing 2 clamp star on span at structure 53 32 Hours
Continuous		  
18-Nov-26 09:00 19-Nov-26 17:00 ATCO, ALTALINK RB 199L (347s AML Fox Creek - 741s ATC Fox Creek) installing 2 clamp star on span at structure 53 32 Hours
Continuous		  
18-Nov-26 09:00 19-Nov-26 17:00 ALTALINK TE 410s Protection & Control (410s Josephburg) protection testing 32 Hours
Daily		  
18-Nov-26 09:00 19-Nov-26 17:00 ATCO, ALTALINK, SHELL TE 402s Protection & Control (402s Scotford Expansion 1) protection testing 32 Hours
Daily		  
18-Nov-26 09:00 18-Nov-26 17:00 ENMAX Outage 15.62L (SS-15 - SS-16) distribution pole change near line 8 Hours
Continuous		  
18-Nov-26 09:00 18-Nov-26 17:00 ENMAX Outage 16.60L (SS-16 - SS-34) distribution pole change near line 8 Hours
Continuous		  
18-Nov-26 09:00 18-Nov-26 18:00 ALTALINK TE AltaLink Telecom Equipment MPLS upgrades 9 Hours
Daily		  
18-Nov-26 09:00 19-Nov-26 17:00 ATCO TE ATCO Telecom Equipment MPLS life cycle upgrades to SAR A, Node 96.1, removal of DJF, replacement of SAR A, Eth Cards, Slot 1.1/1.2, SDI Card 1.3, prep on Nov 18, cut over Nov 19 between 10am-2pm 32 Hours
Continuous		  
18-Nov-26 09:00 18-Nov-26 18:00 ALTALINK TE 38s Protection & Control (38s East Edmonton) breaker fail tripping test, initiation from breaker fail relays to trip BKR 4852 9 Hours
Daily		  
18-Nov-26 09:00 18-Nov-26 16:00 ATCO TE ATCO Telecom Equipment, 720s RTU/SCADA (720s Wabasca) configuration changes on the aprisa facing Wabasca sub to the telecom range 7 Hours
Continuous		  
18-Nov-26 09:00 18-Nov-26 18:00 ATCO TE 851s RTU/SCADA (851s Morse River) both firewalls at the Morse River substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
18-Nov-26 10:00 25-Nov-26 17:00 ATCO, ALTALINK Outage 7L230 (743s Sarah Lake - 888AL tap), 743s 703 (743s Sarah Lake), 743s 7L230D1 (743s Sarah Lake) replace 7L230D1 disconnect switch 175 Hours
Continuous		  
18-Nov-26 10:00 25-Nov-26 18:00 ALTALINK, ATCO IO 7L230 (69s North Barrhead - 888AL tap), 888AL (234s Fort Assiniboine - 7L230 tap) replace 7L230D1 disconnect switch 176 Hours
Continuous		  
18-Nov-26 10:00 25-Nov-26 17:00 ATCO TE 743s Protection & Control (743s Sarah Lake) 50BF/703 relay new settings changes and testing. breaker 743s 703 will be out of service under GOI 2-0093804 during 7L230D1 switch replacement. 175 Hours
Continuous		  
18-Nov-26 10:00 18-Nov-26 14:00 ATCO RB 7L63 (780s Lubicon - 812s Norcen), 7L63 (788s Hotchkiss - 7LA63 tap) high load move at location 7L63-922, live line work 4 Hours
Continuous		  
18-Nov-26 11:00 18-Nov-26 15:00 ATCO RB 7L61 (780s Lubicon - 796s Nipisi) high load move at location 7L61-98, live line work 4 Hours
Continuous		  
18-Nov-26 13:00 20-Nov-26 13:00 CapitalPower, ATCO, GREENGATEP Outage 620s Goldeye, 9L16 (755s Cordel - 972s Tinchebray), 620s T1 (620s Goldeye), 972s 908 (972s Tinchebray), 972s 909 (972s Tinchebray), 620s 7690-CB-001 (620s Goldeye), 620s 7690-SW-001 (620s Goldeye) replace motor on 9L16D2. 48 Hours
Continuous		  
18-Nov-26 13:00 18-Nov-26 17:00 ATCO RB 7L23 (732s Mitsue - 7L23 tap), 7L23 (796s Nipisi - 7L23 tap) high load move at locations 7L23-93, 7L23-212, 7L23-246 4 Hours
Continuous		  
19-Nov-26 08:00 24-Nov-26 16:00 ENMAX, ALTALINK Outage 24.83L (74s Janet - SS-24), 74s 24.83X (74s Janet) steel pole installation 225 Hours
Continuous		  
19-Nov-26 08:00 24-Nov-26 16:00 ENMAX, ALTALINK IO 24.83L (74s Janet - SS-24), 74s 24.83X (74s Janet) Enmax steel pole installation 128 Hours
Continuous		  
19-Nov-26 08:00 19-Nov-26 16:00 ALTALINK TE 370s Protection & Control (370s North Lethbridge) PRC maintenance 8 Hours
Daily		  
19-Nov-26 08:00 19-Nov-26 16:00 ALTALINK TE 205s Protection & Control (205s Castle Rock Ridge) relay maintenance 8 Hours
Daily		  
19-Nov-26 08:00 20-Nov-26 16:00 ENMAX Outage 14.1C (SS-14), 14.2C (SS-14) 14 sub capacitor bank maintenance 32 Hours
Continuous		  
19-Nov-26 08:00 19-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 883s RTU/SCADA (883s Gregoire) resolve the VPN issue we need to replace the old checkpoint 1200R with the newer 1570 series firewall 9 Hours
Continuous		  
19-Nov-26 08:00 19-Nov-26 17:00 ATCO TE 796s RTU/SCADA (796s Nipisi) both firewalls at the Nipisi substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
19-Nov-26 08:00 19-Nov-26 17:00 ATCO TE 2033s RTU/SCADA (2033s Mowat) both firewalls at the Mowat substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
19-Nov-26 08:00 19-Nov-26 17:00 ATCO, CNRL TE 847s RTU/SCADA (847s Muskeg River) both firewalls at the Muskeg substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
19-Nov-26 09:00 19-Nov-26 14:00 ALTALINK Outage 752L (64s East Crossfield - 752AL tap), 64s 452 (64s East Crossfield) breaker outage required for downstream CT secondary connection and testing 5 Hours
Continuous		  
19-Nov-26 09:00 19-Nov-26 18:00 ALTALINK TE 287s RTU/SCADA (287s Hazelwood), AltaLink Telecom Equipment firewall upgrade, MPLS node firmware upgrades , RAW socket conversion, LAN switch upgrade 9 Hours
Daily		  
19-Nov-26 11:00 19-Nov-26 17:00 ATCO TE ATCO Telecom Equipment, 810s RTU/SCADA (810s Dome Cutbank) Dome Cutbank_S-Telecom- 7750-2 integration - swapping site networking to VPLS 11 6 Hours
Continuous		  
20-Nov-26 08:00 20-Nov-26 16:00 ALTALINK TE 87s Protection & Control (87s Gaetz) swap fibers back from trouble shooting 8 Hours
Daily		  
20-Nov-26 08:00 20-Nov-26 16:00 ALTALINK TE 87s Protection & Control (87s Gaetz) swap fibers back from trouble shooting 8 Hours
Daily		  
20-Nov-26 09:00 20-Nov-26 17:00 ALTALINK TE 281s RTU/SCADA (281s Johnson), AltaLink Telecom Equipment firewall upgrade, MPLS firmware upgrades 8 Hours
Continuous		  
20-Nov-26 09:00 20-Nov-26 17:00 ALTALINK TE 325s RTU/SCADA (325s Leduc), AltaLink Telecom Equipment telecom equipment maintenance
8 Hours
Daily		  
20-Nov-26 11:00 20-Nov-26 17:00 ATCO RB 7L56 (725s Goose River - 738s Virginia Hills), 7L56 (725s Goose River - 813s Little Smoky), 7L56 (738s Virginia Hills - 809s Louise Creek) tap up mobile sub onto 144 kV 6 Hours
Continuous		  
20-Nov-26 13:00 20-Nov-26 16:00 EPCOR Outage 72CK12 (987s Clover Bar - Kennedale), K724 (Kennedale), 987s CK725 (987s Clover Bar) Kennedale - K724, switching school training 3 Hours
Continuous		  

Prepared On:   2026-11-10   14:48:24

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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