Alberta Electric System Operator
System Co-ordination Plan
2026-07-16 to 2026-07-24
Approved Outages

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From To Owner Type Element Scheduled Activity Date/Time Comments Interconnection
26-Jul-24 10:00 31-Jul-26 16:00 ATCO Outage 826s 504R (826s Marguerite Lake) emergency removal to replace failed 502R @834S 17,646 Hours
Continuous		  
20-Mar-25 08:00 31-Jul-26 17:00 ALTALINK Outage 256s C1 (256s Harmattan) forced outage 11,961 Hours
Continuous		  
25-Nov-25 17:46 18-Sep-26 18:00 ATCO Outage 876s 901T (876s Brintnell) forced outage oil leaking 7,127.23 Hours
Continuous		  
27-Nov-25 08:30 27-Nov-27 16:30 ALTALINK TE 89s Protection & Control (89s Ellerslie) DSP card replacements on1057L B87/L3 and B240B1 B87/240B1 17,528 Hours
Daily		  
04-Jan-26 08:00 02-Sep-26 16:00 SUNCOR Outage 29EDD-34 260kV Bus 29PP-45 (29EDD-34), 29EDD-34 29-952-113 (29EDD-34), 29EDD-34 29PS-216 (29EDD-34) urgent repairs on 29PT-224 at 29EDD34 on 29PP-45 bus 5,791 Hours
Continuous		  
21-Jan-26 08:00 30-Oct-26 16:00 ENMAX Outage 5.7TR (SS-5) 25kV switchgear replacement 6,775 Hours
Continuous		  
09-Feb-26 09:00 16-Jul-26 17:00 ATCO TE 972s Protection & Control (972s Tinchebray) block all 50BF protection until cutovers and associated commissioning are complete 3,607 Hours
Continuous		  
06-Mar-26 17:00 13-Nov-26 17:00 EPCOR Outage T1 (Woodcroft) woodcroft: TX1 LCR civil 6,048 Hours
Continuous		  
10-Mar-26 10:00 30-Nov-26 17:00 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		  
11-Mar-26 13:45 31-Jul-26 16:00 ALTALINK Outage 535s C1 (535s Joffre) breaker maintenance 3,410.25 Hours
Continuous		  
01-May-26 17:00 25-Nov-26 17:00 EPCOR Outage T1 (Meadowlark) T1 LCR civil work 4,993 Hours
Continuous		  
19-May-26 07:00 02-Oct-26 17:00 EPCOR TE 987s Protection & Control (987s Clover Bar) protection blocking - relay maintenance and bus differential upgrade project 2,434 Hours
Continuous		  
27-May-26 18:00 17-Jul-26 10:59 ALTALINK Outage 526s C1 (526s Buffalo Creek) forced outage 1,216.98 Hours
Daily		  
01-Jun-26 09:00 16-Jul-26 17:30 ATCO TE 865s RTU/SCADA (865s Saddlehills) updating RTU/station controller configuration during SCADA upgrade project 1,088.5 Hours
Continuous		  
02-Jun-26 10:00 16-Jul-26 16:00 ATCO Outage 743s 701T (743s Sarah Lake), 743s 705 (743s Sarah Lake), 743s 605 (743s Sarah Lake), 743s 501 (743s Sarah Lake) 743S Sarah lake rebuild 990 Hours
Continuous		  
04-Jun-26 07:01 10-Feb-27 17:00 EPCOR Outage T1 (Rossdale) rossdale: TX1 lcr civil 6,034.98 Hours
Continuous		  
07-Jun-26 17:05 01-Oct-26 00:00 ACCIONA, ENBRIDGE, ICPCL Outage 139s C1 (139s Hillridge) forced outage 2,766.92 Hours
Continuous		  
08-Jun-26 07:00 04-Dec-26 17:00 EPCOR TE EP 511s Protection & Control (EP 511s Victoria) 72kV breaker fail protection blocking 2,626 Hours
Continuous		  
09-Jun-26 07:00 16-Jul-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) relay testing 826.5 Hours
Continuous		  
09-Jun-26 07:00 16-Jul-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) isolating 50BF/705 for relay testing 178.5 Hours
Continuous		  
09-Jun-26 07:00 16-Jul-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) isolating 50BF/605 for relay testing 178.5 Hours
Continuous		  
15-Jun-26 07:00 24-Jul-26 17:00 EPCOR Outage EP 805s J2403 (EP 805s Jasper) J2403 replacement LCR 946 Hours
Continuous		  
15-Jun-26 07:00 04-Sep-26 17:00 EPCOR TE 805s Protection & Control (805s Jasper) protection blocking, breaker replacement project 1,954 Hours
Continuous		  
15-Jun-26 07:00 17-Jul-26 17:00 EPCOR Outage 72JM18 (EP 805s Jasper - Meadowlark), M721 (Meadowlark), M722 (Meadowlark), EP 805s J722 (EP 805s Jasper), T1 (Meadowlark), MAB1 (Meadowlark) Meadowlark: TX1 Zone, LCR Civil Work 274 Hours
Continuous		  
19-Jun-26 17:00 03-Dec-27 17:00 EPCOR Outage EP 511s Victoria T3 (EP 511s Victoria) emergency outage due to degraded asset condition 12,769 Hours
Continuous		  
29-Jun-26 10:00 24-Jul-26 17:30 ATCO TE 763s RTU/SCADA (763s Hanna) 602T ITM replacement
, SCADA updates required as part of ITM replacement project		 439.5 Hours
Continuous		  
05-Jul-26 08:00 23-Jul-26 16:00 Syncrude TE Syncrude RTU/SCADA (Syncrude Plant 30-2) replacing an obsolete UPS in 30-2PEB15-2 440 Hours
Continuous		  
06-Jul-26 07:00 16-Jul-26 17:00 ALTALINK TE 368s RTU/SCADA (368s Burdett) 368s RTU configuration update 250 Hours
Daily		  
06-Jul-26 08:00 17-Jul-26 16:00 ALTALINK TE 214s Protection & Control (214s Innisfail), 287s Protection & Control (287s Hazelwood), 55s Protection & Control (55s Olds) LTO and transfer tripping settings changes for RAS scheme updates due to the implementation of 475s mobile sub at 55s 272 Hours
Daily		  
06-Jul-26 08:00 17-Jul-26 16:00 ALTALINK TE 214s RTU/SCADA (214s Innisfail) RAS updates due to 55s mobile sub installation 272 Hours
Daily		  
06-Jul-26 08:00 17-Jul-26 16:00 ALTALINK TE 287s RTU/SCADA (287s Hazelwood) changes to RAS scheme due to addition of 55s mobile sub 272 Hours
Daily		  
06-Jul-26 09:00 17-Jul-26 17:00 BCH RB 2L113 (BCH Cranbrook - BCH Natal) hazard tree removals 272 Hours
Continuous		 AB-BC
06-Jul-26 10:00 24-Jul-26 17:30 ATCO Outage 763s 602T (763s Hanna), 763s 507C (763s Hanna), 763s 604 (763s Hanna) 500D1 repair
- 602T ITM replacement
 271.5 Hours
Continuous		  
06-Jul-26 13:00 16-Jul-26 17:00 ALTALINK Outage 761L (38s East Edmonton - 71s Lamoureux), 38s 761N (38s East Edmonton), 71s 552 (71s Lamoureux), 71s 652 (71s Lamoureux), 71s 761W (71s Lamoureux) 38s761N breaker replacement, replace 71s39, maintenance on 71s761W 244 Hours
Continuous		  
06-Jul-26 14:00 16-Jul-26 17:00 ALTALINK TE 38s Protection & Control (38s East Edmonton) 38s761N 138 kV breaker replacement, isolations, protection testing

243 Hours
Continuous		  
09-Jul-26 07:00 16-Jul-26 17:00 ALTALINK TE 77s RTU/SCADA (77s Sagitawah) RTU database update 178 Hours
Daily		  
10-Jul-26 08:00 18-Nov-26 16:00 Syncrude Outage 815 (Syncrude Mildred Lake), 816 (Syncrude Mildred Lake) replace 72 kV underground feeder cables on west mine feeder 2,696 Hours
Continuous		  
13-Jul-26 07:00 19-Jul-26 17:00 EPCOR Outage 72CH11 (987s Clover Bar - EP Hardisty), T1 (EP Hardisty), H722 (EP Hardisty), H725 (EP Hardisty), 987s CH724 (987s Clover Bar), S724 (Strathcona), H723 (EP Hardisty) t1 maintenance and bus diff 154 Hours
Continuous		  
13-Jul-26 07:00 19-Jul-26 17:00 EPCOR Outage EP 803s L2401 (EP 803s Lambton) breaker maintenance 154 Hours
Continuous		  
13-Jul-26 07:00 17-Jul-26 17:00 ALTALINK TE AltaLink Telecom Equipment 2012F fiber relocation for road move 106 Hours
Continuous		  
13-Jul-26 07:00 17-Jul-26 17:00 ALTALINK, EPCOR TE 909L (310p Sundance - 665s Dome) Altalink is relocating 2012F fiber for road move 106 Hours
Continuous		  
13-Jul-26 07:00 17-Jul-26 17:00 ALTALINK, EPCOR TE 1139L (367s Harry Smith - EP Riverview) Altalink is relocating 2012F fiber for road move 106 Hours
Continuous		  
13-Jul-26 07:00 17-Jul-26 17:00 ALTALINK, EPCOR TE 1209L (89s Ellerslie - 330p Genesee) Altalink is relocating 2012F fiber for road move 106 Hours
Continuous		  
13-Jul-26 07:00 17-Jul-26 17:00 ALTALINK, EPCOR TE 1045L (EP 805s Jasper - 1045AL tap) Altalink is relocating 2012F fiber for road move 106 Hours
Continuous		  
13-Jul-26 07:00 24-Jul-26 17:00 ALTALINK, EPCOR TE 909L (310p Sundance - 665s Dome) protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous		  
13-Jul-26 07:00 24-Jul-26 17:00 ALTALINK, EPCOR TE 909L (89s Ellerslie - 665s Dome) protection blocking for MPLS cutovers and commissionin 274 Hours
Continuous		  
13-Jul-26 07:30 16-Jul-26 16:30 ALTALINK, DOW RB 787AL (906s Ross Creek - 787L tap), 787L (166s Dow Chemical Fort Saskatchewan - 787AL tap), 787L (71s Lamoureux - 787AL tap) safety requirement - crew working in vicinity 81 Hours
Continuous		  
13-Jul-26 08:00 24-Jul-26 16:00 ALTALINK TE 310p Protection & Control (310p Sundance) EPCOR MPLS upgrade
272 Hours
Continuous		  
13-Jul-26 08:00 24-Jul-26 16:00 ALTALINK TE 89s Protection & Control (89s Ellerslie) EPCOR MPLS upgrade 272 Hours
Continuous		  
13-Jul-26 08:00 16-Jul-26 16:00 ENMAX Outage 13.3TR (SS-13) transformer testing 80 Hours
Continuous		  
13-Jul-26 08:00 16-Jul-26 16:00 ENMAX Outage 3.82L (SS-3 - SS-8), 3.3TR (SS-3), 3B138-3.82 (SS-3), SW83 (SS-3), 3MD138-3.3TR (SS-3) tap changer inspection 80 Hours
Continuous		  
13-Jul-26 09:00 24-Jul-26 17:30 ATCO Outage 2075s 901T (2075s Newell), 2075s 917 (2075s Newell), 2075s 918 (2075s Newell), 2075s ACF11 (2075s Newell), 2075s ACF12 (2075s Newell), 2075s ACF13 (2075s Newell), 2075s ACF14 (2075s Newell), 2075s ACF1D1 (2075s Newell) SVC Newell maintenance 272.5 Hours
Continuous		  
13-Jul-26 10:00 16-Jul-26 16:00 ATCO Outage 918s 702T (918s Bauer), 918s 702 (918s Bauer) transformer and breaker maintenance 78 Hours
Continuous		  
13-Jul-26 10:00 17-Jul-26 17:30 ALTALINK RB 472AL (221s Sunken Lake - 472L tap), 472L (213s Hughenden - 472AL tap), 472L (648s Metiskow - 472AL tap) 472L 204, 208, 241, 245, 343, 358, 367, replace arms and glass, replace structure 241 103.5 Hours
Continuous		  
13-Jul-26 10:00 16-Jul-26 16:00 ATCO TE 918s RTU/SCADA (918s Bauer) In conjunction with 1-00519538. 918s RTU outage 10-20 min to push new config file. 78 Hours
Continuous		  
13-Jul-26 12:00 17-Jul-26 16:00 ATCO Outage 6L12 (774s Monitor - 6L25 tap), 774s 601 (774s Monitor), 774s 6L12D5 (774s Monitor), 774s 601A (774s Monitor) road rebuild structure replacements 100 Hours
Continuous		  
13-Jul-26 13:00 16-Jul-26 15:00 ATCO RB 7L85 (801s Anderson - ATC 803s Bullpound), 7L85 (803s ATC Bullpound - 7LA85 tap), 7L85 (804s Wintering Hills - 7LA85 tap) installing interphase spacers on 7L85 - live line work 74 Hours
Continuous		  
14-Jul-26 08:00 01-Oct-26 17:00 ALTALINK IO 287s 552 (287s Hazelwood) 287s552 must be open during 443L and 417L outage for the 214s AIS to work properly 1,905 Hours
Continuous		  
14-Jul-26 09:30 23-Jul-26 11:00 ALTALINK Outage 163s T5 (163s Amoco Empress) 163sT5 maintenance and oil leaks 217.5 Hours
Continuous		  
14-Jul-26 12:00 20-Jul-26 10:00 ATCO Outage 886s 701T (886s Updike) transformer and breaker testing, mobile sub will be carrying all the load 166 Hours
Continuous		  
14-Jul-26 13:00 17-Jul-26 13:00 ATCO Outage 783s 701T (783s Cadotte River), 783s 701TD (783s Cadotte River) 783S 144kV fuse replacement
, 783s 701T transformer class 2 major testing		 72 Hours
Continuous		  
15-Jul-26 07:00 16-Jul-26 17:00 ALTALINK, TRANSALTA RB 179s 733 (179s Gleichen), 428s 733X (428s Namaka), 733L (179s Gleichen - 428s Namaka) 733L str. 161-211 prep. Live line work. 34 Hours
Daily		  
15-Jul-26 07:00 16-Jul-26 17:00 ALTALINK RB 151s 733E (151s Strathmore), 428s 733N (428s Namaka), 733L (151s Strathmore - 428S Namaka) 733L 131 Top Phase Keeper Key. Live Line. 34 Hours
Daily		  
15-Jul-26 07:30 16-Jul-26 16:00 ALTALINK, ENEL Outage 205s T1 (205s Castle Rock Ridge), 205s 89T1 (205s Castle Rock Ridge) two day outage required for 205s planned maintenance 32.5 Hours
Continuous		  
15-Jul-26 08:00 21-Jul-26 10:59 SUNCOR Outage 29EDD-1 29EDD1s452 (29EDD-1 Millennium) maintenance and test 156 Hours
Continuous		  
15-Jul-26 08:00 16-Jul-26 16:00 ENMAX Outage 21.61L (SS-21 - SS-34), 34B69-21.61 (SS-34), 21B69-21.61 (SS-21) hv breaker maintenance 32 Hours
Continuous		  
15-Jul-26 08:00 16-Jul-26 16:00 ENMAX Outage 40.1TR (SS-40) secondary cabinet measurements and CT testing 32 Hours
Continuous		  
15-Jul-26 08:00 16-Jul-26 14:30 ALTALINK Outage 62s T1 (62s Brazeau Plant), 62s 1 (62s Brazeau Plant) customer to balance BR1 motor 30.5 Hours
Daily		  
15-Jul-26 09:00 21-Jul-26 17:00 ATCO, SUNCOR TE 29PL9-1 (29EDD-1 Millennium - 848s Ruth Lake) pm 5y,10y protection only 104 Hours
Continuous		  
15-Jul-26 10:00 16-Jul-26 16:00 ATCO Outage 825s 904 (825s Whitefish Lake) breaker maintenance 30 Hours
Continuous		  
15-Jul-26 10:00 16-Jul-26 16:00 ATCO Outage 856s 904 (856s Kinosis) trip coil testing, breaker maintenance 30 Hours
Continuous		  
15-Jul-26 11:00 27-Jul-26 16:00 ATCO, ALTALINK Outage 6L126 (743s Sarah Lake - 515L tap), 743s 601 (743s Sarah Lake) 743S Sarah lake rebuild. Replace breaker 601 317 Hours
Continuous		  
15-Jul-26 14:01 05-Oct-26 09:00 ALTALINK Outage 417L (55s Olds - 281s Johnson), 55s T1 (55s Olds), 55s T2 (55s Olds), 55s 417 (55S Olds), 287s 552 (287s Hazelwood), 55s 2 (55s Olds) mobile install at 55s for P_C major upgrade, repair/replace s80, s83, s84. salvage s51. 1,962.98 Hours
Continuous		  
16-Jul-26 07:00 16-Jul-26 17:00 ALTALINK RB 600L (404s Peace Butte - 523s Bullshead) 600L str 30, 102, 131, re-install keeper key top right phase - live line work 9 Hours
Continuous		  
16-Jul-26 07:00 21-Jul-26 17:00 SUNCOR Outage 635EDD-1000 635PK-1000 (635EDD-1000), 635EDD-1000 635-752-132 (635EDD-1000), 635EDD-1000 635-752-131 (635EDD-1000), 635EDD-1000 635PS-1017 (635EDD-1000), 635EDD-1000 635PS-1018 (635EDD-1000), 635EDD-1000 635PS-1040 (635EDD-1000), 635EDD-1000 635PS-1016 (635EDD-1000) 6 year planned maintenance on 144kV equipment 130 Hours
Continuous		  
16-Jul-26 08:00 16-Jul-26 16:00 ENMAX TE Protection & Control (SS-23) 23sub zone 31 138kV bus differential, 86-Z31 lockout relay protection outage 8 Hours
Continuous		  
16-Jul-26 08:30 16-Jul-26 16:00 ALTALINK Outage 256s C1 (256s Harmattan) PRC maintenance on the cap bank protection 7.5 Hours
Continuous		  
16-Jul-26 08:30 16-Jul-26 16:00 ALTALINK TE 256s Protection & Control (256s Harmattan) PRC maintenance 7.5 Hours
Continuous		  
16-Jul-26 09:00 16-Jul-26 16:00 ATCO TE ATCO Telecom Equipment, 2091s RTU/SCADA (2091s Thornton) Smoky River_T-Telecom-MDR Radio 7 Hours
Continuous		  
16-Jul-26 09:30 16-Jul-26 12:30 ALTALINK Outage 38s C1 (38s East Edmonton), 38s C2 (38s East Edmonton) cap bank weed spraying 3 Hours
Continuous		  
16-Jul-26 10:00 16-Jul-26 14:00 ALTALINK TE 178s RTU/SCADA (178s Cynthia), 359s RTU/SCADA (359s Esso West Pembina), AltaLink Telecom Equipment Firewall upgrade with a switch changeout. MPLS Node Firmware upgrade as well, SCADA VLAN Config.
4 Hours
Daily		  
16-Jul-26 15:00 16-Jul-26 17:00 ALTALINK Trans Test 157s 852 (157s Lac La Biche) multiple breaker operations required to sync POW controller 2 Hours
Continuous		  
17-Jul-26 06:00 18-Jul-26 18:00 ALTALINK Outage 42s 3W (42s Sarcee), 3L (42s Sarcee - 272s Springbank) replacing cross arms and insulators on structures 373, 387, & 390

36 Hours
Continuous		  
17-Jul-26 08:00 17-Jul-26 16:00 ALTALINK TE 86s RTU/SCADA (86s Bigstone) split the existing SCADA VLAN from 1 to 1 and 2
8 Hours
Continuous		  
17-Jul-26 08:00 17-Jul-26 18:00 ENMAX Outage 14.1C (SS-14), 14.2C (SS-14), 14.83L (SS-14 - SS-36), 14.4TR (SS-14), 14.2TR (SS-14), SW84 (SS-14), 14B138-14.83 (SS-14), 14MD138-14.4TR (SS-14), 14MD138-14.2TR (SS-14), 36B138-14.83 (SS-36) power factor test, reversing switch check and oil sampling 10 Hours
Continuous		  
17-Jul-26 09:00 17-Jul-26 11:00 BCH Outage 2L293 (BCH Nelway - BCH Selkirk) 2CT2 energization 2 Hours
Continuous		 AB-BC
17-Jul-26 10:00 20-Jul-26 14:00 ATCO RB 6L56 (763s Hanna - 802s Michichi Creek) climbing inspection on 6L56 between Hanna and Michichi 76 Hours
Continuous		  
17-Jul-26 10:00 17-Jul-26 14:00 ALTALINK Outage 252s T2 (252s Jarrow) install T2 transformer grounding 4 Hours
Continuous		  
17-Jul-26 11:00 25-Jul-26 15:30 ALTALINK Outage 526s 652 (526s Buffalo Creek) replace 526s652 breaker 196.5 Hours
Continuous		  
18-Jul-26 08:00 18-Jul-26 18:00 ENMAX Outage 33.84L (SS-33 - SS-43), 43.2TR (SS-43), 43B138-33.84 (SS-43), 33B138-33.84 (SS-33), 43MD138-43.2TR (SS-43) substation structure painting 10 Hours
Continuous		  
18-Jul-26 08:00 18-Jul-26 16:00 ENMAX Outage 32.2TR (SS-32) 32.2TR transformer repair 8 Hours
Continuous		  
18-Jul-26 11:00 18-Jul-26 12:00 ATCO Outage 914s Bindloss, 893s Cavendish, 7L760 (7LA760 tap - 7LC760 tap) Outage Required to put 7L760D4 into service.
Open D3, Open D5, Open D1 ??Obtain GOI (1-hour) To put D4 in service
Remove temp D4 bypass jumpers
Install risers to D4		 1 Hour
Continuous		  
18-Jul-26 11:00 18-Jul-26 16:00 ATCO RB 6L09 (763s Hanna - 776s Richdale) reclosing blocked for 7L760 outages 1-528265 and 1-528266 5 Hours
Continuous		  
18-Jul-26 12:15 18-Jul-26 16:00 ATCO Outage 7L760 (7LA760 tap - 7LC760 tap) Outage Required to put 7L760D4 into service.
Remove standoff insulators from structure 495 that were installed for the temporary bypass
Splice out temporary jumpers J1, permanently removing J1		 3.75 Hours
Continuous		  
19-Jul-26 08:00 19-Jul-26 18:00 ENMAX Outage 24.81L (SS-24 - SS-31), 31.84L (SS-31 - SS-32), 31.3TR (SS-31), 31.2TR (SS-31), 31B138-31.84 (SS-31), 31B138-24.81 (SS-31), 32B138-31.84 (SS-32), 24B138-24.81 (SS-24), 31MD138-31.2TR (SS-31), 31MD138-31.3TR (SS-31) spring substation washing and 31 sub maintenance 10 Hours
Continuous		  
19-Jul-26 08:00 19-Jul-26 18:00 ENMAX Outage 31.1C (SS-31) 31sub spring substation washing, cap bank outage required while 138kV PTs offline 10 Hours
Continuous		  
19-Jul-26 09:00 20-Jul-26 09:00 ATCO Outage 6L12 (774s Monitor - 6L25 tap), 774s 601 (774s Monitor) outage required on 6L12 between Sullivan and 6L25 Tap for structure replacements and deficiency repair
24 Hours
Continuous		  
20-Jul-26 07:00 02-Aug-26 17:00 EPCOR Outage 987s T1 (987s Clover Bar), 987s CCP7213 (987s Clover Bar), 987s CCP7214 (987s Clover Bar), 987s C2401 (987s Clover Bar), 987s C2403 (987s Clover Bar) cloverbar: C2401/C2403 breaker maintenance and CT doble and CDS19 LCR and C2401 relay maintenance 322 Hours
Continuous		  
20-Jul-26 07:00 23-Jul-26 18:00 ALTALINK, TRANSALTA Outage 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
"		 81 Hours
Continuous		  
20-Jul-26 07:00 23-Jul-26 17:00 ALTALINK, EPCOR Outage 1057L (89s Ellerslie - 657s Summerside), 657s SU2401 (657s Summerside), 657s SU2402 (657s Summerside), 89s 352 (89s Ellerslie), 89s 452 (89s Ellerslie), 657s SUDS9 (657s Summerside), 89s 1057 (89s Ellerslie) 1057L/Summerside: CVT/arrestor doble, SUDS1/SUDS3/SUDS9 disconnect maintenance 82 Hours
Continuous		  
20-Jul-26 07:00 23-Jul-26 17:00 EPCOR Outage 805s T3 (805s Jasper) jasper: transformer3 tap changer investigation w/vendor 82 Hours
Continuous		  
20-Jul-26 07:00 31-Jul-26 17:00 ALTALINK, EPCOR TE 908AL (52S East Industrial - 908L tap) 908LW: protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous		  
20-Jul-26 07:00 31-Jul-26 17:00 ALTALINK, EPCOR TE 1059AL (52s East Industrial - 1059L tap), 1059L (EP 803s Lambton - 1059AL tap) 1059L: protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous		  
20-Jul-26 07:00 29-Jul-26 09:00 ALTALINK Outage 77s 40 (77s Sagitawah) protection upgrade 218 Hours
Continuous		  
20-Jul-26 07:00 30-Jul-26 17:00 ALTALINK TE 238s RTU/SCADA (238s Shell Harmattan) RTU configuration update 250 Hours
Daily		  
20-Jul-26 07:00 31-Dec-26 17:00 EPCOR TE Protection & Control (Woodcroft) woodcroft: protection blocking for TX1 LCR, line protection testing, and repairs 3,947 Hours
Continuous		  
20-Jul-26 07:00 04-Sep-26 17:00 EPCOR TE 330p Protection & Control (330p Genesee) genesee: protection blocking, firmware updates 1,114 Hours
Continuous		  
20-Jul-26 07:00 20-Jul-26 17:00 ALTALINK, TRANSALTA Outage 33s 2 (33s Spray), 33s T2 (33s Spray) brushgear maintenance 10 Hours
Continuous		  
20-Jul-26 07:00 21-Jul-26 17:00 ALTALINK TE 310p Protection & Control (310p Sundance) isolating protections for CT1252 testing, protections restored daily. 34 Hours
Daily		  
20-Jul-26 07:30 29-Jul-26 08:30 ATCO, ALTALINK RB 9L938 (77s Sagitawah - 809s Louise Creek) reclosing blocked for AltaLink 217 Hours
Continuous		  
20-Jul-26 08:00 21-Jul-26 17:00 ALTALINK RB 151s 733E (151s Strathmore), 428s 733N (428s Namaka), 733L (151s Strathmore - 428S Namaka) replace install keeper key str: 131
33 Hours
Continuous		  
20-Jul-26 08:00 27-Jul-26 16:00 ATCO Outage 7L48 (794s Valleyview - 7LA48 tap), 794s 703 (794s Valleyview) pole replacement from test and treat 176 Hours
Continuous		  
20-Jul-26 08:00 20-Jul-26 16:00 ENMAX, ALTALINK Outage 28.80L (42s Sarcee - SS-28), 28B138-28.80 (SS-28), 42s 28 (42s Sarcee) hv breaker maintenance 8 Hours
Continuous		  
20-Jul-26 08:00 20-Jul-26 16:00 ENMAX, ALTALINK IO 28.80L (42s Sarcee - SS-28) enmax hv breaker maintenance 8 Hours
Continuous		  
20-Jul-26 08:00 21-Jul-26 17:00 ALTALINK Outage 310p 1252 (310p Sundance) test 310p1252 CTs 33 Hours
Continuous		  
20-Jul-26 08:00 20-Jul-26 16:00 ALTALINK TE 95s RTU/SCADA (95s Imperial Oil Edmonton) split the existing SCADA vlan from 1 to 1 and 2, no impact on production 8 Hours
Continuous		  
20-Jul-26 08:00 31-Jul-26 16:00 ALTALINK, EPCOR TE 38s Protection & Control (38s East Edmonton), 1059AL (52s East Industrial - 1059L tap), 1059L (38s East Edmonton - 1059AL tap), 1059L (EP 803s Lambton - 1059AL tap) 1059L, relay testing and cutover, protection blocking, EPCOR MPLS Upgrade, TPR cutover, commissioning, EPCOR Ref. #: OE114341 272 Hours
Continuous		  
20-Jul-26 08:00 31-Jul-26 16:00 ALTALINK, EPCOR TE 38s Protection & Control (38s East Edmonton), 89s Protection & Control (89s Ellerslie), 908L (38s East Edmonton - 908AL tap), 908AL (52S East Industrial - 908L tap), 908L (89s Ellerslie - 816s Petrolia), 908L (89s Ellerslie - 908AL tap) relay testing and cutover, protection blocking, MPLS Upgrade, TPR Cutover, Commissioning, OE114342
272 Hours
Continuous		  
20-Jul-26 08:00 23-Jul-26 16:00 ALTALINK TE 1080s RTU/SCADA (1080s Raptor) RTU config updates to remove RAS alarms from HMI. Visibility will be lost for approx. 5 min. during re-boots. 80 Hours
Daily		  
20-Jul-26 08:00 20-Jul-26 16:00 ENMAX TE Protection & Control (SS-2) 2 sub 86 breaker fail-D84 protection outage. relays, lockout testing. back up fault clearing time 5.5 cycles 8 Hours
Continuous		  
20-Jul-26 08:00 21-Jul-26 16:00 ENMAX Outage 38.1TR (SS-38) tap changer inspection - 38.1-TC. tap changer reversing switch check 32 Hours
Continuous		  
20-Jul-26 08:00 23-Jul-26 16:00 ENMAX Outage 31.1TR (SS-31) transformer power factor test, secondary cable test. transformer maintenance. relay fault pressure test. oil sampling 80 Hours
Continuous		  
20-Jul-26 08:00 21-Jul-26 16:00 ENMAX Outage 9.1TR (SS-9) secondary cabinet measurements and CT testing 32 Hours
Continuous		  
20-Jul-26 08:00 21-Jul-26 16:00 ENMAX Outage 13.82L (SS-13 - SS-22), 13B138-13.82 (SS-13), 22B138-13.82 (SS-22) 13-sub disconnect switch replacement, sco/qmf work 32 Hours
Continuous		  
20-Jul-26 08:00 24-Jul-26 16:00 ALTALINK TE 254s RTU/SCADA (254s Coaldale) update the RTU/HMI configuration. the supervisory outage will be returned by EOD everyday. 104 Hours
Daily		  
20-Jul-26 08:00 24-Jul-26 16:00 ALTALINK TE 254s Protection & Control (254s Coaldale) need to take the protection outage for A protection (SEL-311C) to update relay settings, this outage will be returned EOD, every day 104 Hours
Daily		  
20-Jul-26 08:00 30-Jul-26 15:00 CMH TE MH-60L (MHS-5 NE Crescent Heights - MHS-7 Brier Park) perform preventative maintenance on LDR-60L-A. 247 Hours
Continuous		  
20-Jul-26 08:00 21-Jul-26 16:00 ATCO RB 7L03 (731s Elmworth - 7L09 tap), 7L03 (749s Flyingshot Lake - 7L09 tap) complete the remaining 1 structure 32 Hours
Continuous		  
20-Jul-26 08:00 21-Jul-26 16:00 ENMAX TE Protection & Control (SS-8) 8 sub 138kV bus differential zone 43 "A" protection outage. relay protection test - 8RLY138-8.ZE4-E3 A GE. back-up clearing time 5.5 cycles 32 Hours
Continuous		  
20-Jul-26 09:00 21-Jul-26 18:00 ALTALINK, GWPCORP Outage 138s 2552 (138s Windy Flats), 603L (138s Windy Flats - 243s Soderglen), 243s Soderglen maintenance on 243s138DS1 33 Hours
Continuous		  
20-Jul-26 09:00 23-Jul-26 17:30 ALTALINK, EPCOR IO 1057L (89s Ellerslie - 657s Summerside) 1057L/Summerside: CVT/Arrestor Doble, SUDS1/SUDS3/SUDS9 disconnect maintenance 80.5 Hours
Continuous		  
20-Jul-26 09:00 24-Jul-26 17:00 BCH RB 5L92 (BCH Cranbrook - BCH Selkirk) 5L92 LLP/ANR - barehand insulator replacement 104 Hours
Continuous		 AB-BC
20-Jul-26 09:00 24-Jul-26 17:00 BCH RB 2L113 (BCH Cranbrook - BCH Natal) LLP work - hazard tree removals between 10-01 to 44-01 104 Hours
Daily		 AB-BC
20-Jul-26 09:30 20-Jul-26 13:30 Lethbridge TE 146s RTU/SCADA (146s Macdonald) replace rx1500, commission new rx1524, cc will lose comms to 146s, substation tech on site 4 Hours
Continuous		  
20-Jul-26 10:00 21-Jul-26 16:00 ATCO Outage 825s 905 (825s Whitefish Lake) breaker maintenance 30 Hours
Continuous		  
20-Jul-26 10:00 21-Jul-26 15:00 ATCO Outage 7L85 (804s Wintering Hills - 7LA85 tap), 804s 702 (804s Wintering Hills) breaker SF6 GL312 TESTING - 702 @ 804S 29 Hours
Continuous		  
20-Jul-26 10:00 24-Jul-26 16:00 ATCO Outage 7L135 (820s Hangingstone - 977s Salt Creek), 977s 901T (977s Salt Creek) transformer and tap changer maintenance 102 Hours
Continuous		  
20-Jul-26 10:00 20-Jul-26 11:00 ATCO RB 7L34 (815s Goodfare - 886s Updike) HOP to disconnect 902S mobile 3 - opening Jumper J1 1 Hour
Continuous		  
20-Jul-26 10:00 23-Jul-26 17:30 ALTALINK RB 472AL (221s Sunken Lake - 472L tap), 472L (213s Hughenden - 472AL tap), 472L (648s Metiskow - 472AL tap) 472L 204, 208, 241, 245, 343, 358, 367.replace arms, glass, structure 241. 79.5 Hours
Continuous		  
20-Jul-26 10:00 20-Jul-26 16:00 ALTALINK TE 255s Protection & Control (255s Vulcan) techs to complete PRC maintenance on the following redundant relays: 161L (L1) line prot, 161L (L1) line prot, one at a time 6 Hours
Continuous		  
20-Jul-26 10:00 20-Jul-26 20:00 ALTALINK, EPCOR Outage 700L (422s Westwood - 746L tap), 700L (746s Sherwood Park - 746L tap), 746L (700L tap - 746AL tap), 422s 700 (422s Westwood), 746s 700N (746s Sherwood Park) urgent high load move on 700L/746L due to a road washout, causing the delivery of equipment to take an alternate route 10 Hours
Daily		  
20-Jul-26 11:30 27-Jul-26 14:30 ATCO, ALTALINK RB 199L (347s AML Fox Creek - 741s ATC Fox Creek) 14 Red tag pole change program 171 Hours
Continuous		  
20-Jul-26 12:00 27-Jul-26 14:00 ATCO, ALTALINK RB 7L199 (347s AML Fox Creek - 741s ATC Fox Creek) 14 Red tag pole change program 170 Hours
Continuous		  
20-Jul-26 13:00 23-Jul-26 15:00 ATCO RB 7L85 (801s Anderson - ATC 803s Bullpound), 7L85 (803s ATC Bullpound - 7LA85 tap), 7L85 (804s Wintering Hills - 7LA85 tap) HOP required for installing interphase spacers on 7L85 live line. 74 Hours
Continuous		  
20-Jul-26 13:00 23-Jul-26 17:00 ALTALINK Outage 767L (310p Sundance - 767AL tap), 310p 767X (310p Sundance) breaker maintenance on 310p767X 76 Hours
Continuous		  
20-Jul-26 14:30 07-Aug-26 17:00 ALTALINK Outage 1083L (63s Red Deer - 288s Wolf Creek), 63s 452 (63s Red Deer), 63s 552 (63s Red Deer), 288s 352 (288s Wolf Creek), 288s 152 (288s Wolf Creek), 288s 1083 (288s Wolf Creek), 63s 1083 (63s Red Deer) 63s452 breaker replacement 434.5 Hours
Continuous		  
20-Jul-26 14:30 23-Jul-26 16:30 ALTALINK Outage 157s 788N (157s Lac La Biche), 788L (157s Lac La Biche - 788AL tap) 157s788N breaker maintenance 74 Hours
Continuous		  
20-Jul-26 14:30 23-Jul-26 16:30 ATCO, ALTALINK RB 788L (898s Heart Lake - 788AL tap) reclosing blocked 0n 788L for AltaLink 74 Hours
Continuous		  
21-Jul-26 06:00 21-Jul-26 18:00 SUNCOR Outage 635EDD-1000 635-752-113 (635EDD-1000) 144kV Breaker outage required to replace merging unit with faulty core 12 Hours
Continuous		  
21-Jul-26 07:00 27-Jul-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) isolating 21A/6L126 for relay testing 154.5 Hours
Continuous		  
21-Jul-26 07:00 27-Jul-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) isolating 21B/6L126 for relay testing 154.5 Hours
Continuous		  
21-Jul-26 07:00 27-Jul-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) isolating 86-50BF-1/600BS1 and 94-50BF-1/600BS1 (50BF-600BS1) 154.5 Hours
Continuous		  
21-Jul-26 07:00 27-Jul-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) 50BF/601 for relay testing 154.5 Hours
Continuous		  
21-Jul-26 07:30 21-Jul-26 15:30 ALTALINK Outage 993s T2 (993s Abee) replace the cabinet cover on the T2 NGR 8 Hours
Daily		  
21-Jul-26 08:00 22-Jul-26 17:00 ATCO Outage 7L65 (709s Vegreville - 7LA65 tap), 7L65 (710s Vermilion - 7LA65 tap), 7LA65 (708s Grizzly Bear - 7L65 tap) Switch Repairs, 7LA65D1 33 Hours
Continuous		  
21-Jul-26 08:00 21-Jul-26 16:00 ALTALINK, CHDI TE AltaLink Telecom Equipment, 322s RTU/SCADA (322s Cowley Ridge) fix issues 8 Hours
Continuous		  
21-Jul-26 08:00 21-Jul-26 17:00 ALTALINK TE 171s RTU/SCADA (171s Redwater) split the existing SCADA VLAN from 1 to 1 and 2 and firewall upgrade 9 Hours
Continuous		  
21-Jul-26 08:00 22-Jul-26 16:00 ENMAX Outage 2.80L (SS-2 - SS-23), 23B138-2.80 (SS-23) 23B138-2.80 Rebuild dash pot, low oil. HV Breaker SF6 Gas Sample 32 Hours
Continuous		  
21-Jul-26 08:00 21-Jul-26 16:00 ALTALINK TE 237s RTU/SCADA (237s Foothills) to push new configuration to add points for future SCADA fault reporting project 8 Hours
Continuous		  
21-Jul-26 08:00 22-Jul-26 16:00 ENMAX Outage 2.80L (SS-2 - SS-23), 2B138-D93 (SS-2), 2B138-D94 (SS-2) Install ITBs - 2RLY138-D93-D94 (BMR7). Relay maint. 32 Hours
Continuous		  
21-Jul-26 08:00 29-Jul-26 16:00 ENMAX Outage 1.80L (SS-1 - SS-28), 28B138-1.80 (SS-28) transmission tower climbing inspection 200 Hours
Continuous		  
21-Jul-26 08:00 25-Jul-26 12:00 ENMAX Outage 20.82L (SS-20 - SS-21) Transmission tower climbing inspection 100 Hours
Continuous		  
21-Jul-26 08:00 21-Jul-26 17:00 ATCO TE ATCO Telecom Equipment, 2009s RTU/SCADA (2009s Willow Lake) both firewalls at the Willow Lake substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
21-Jul-26 08:00 21-Jul-26 17:00 ATCO TE 718s RTU/SCADA (718s Parsons Creek), ATCO Telecom Equipment both firewalls at the Parsons Creek substation will undergo a scheduled upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
21-Jul-26 10:00 21-Jul-26 14:00 ALTALINK TE AltaLink Telecom Equipment MPLS firmware upgrade 4 Hours
Daily		  
21-Jul-26 11:01 21-Jul-26 20:00 SUNCOR Outage 29EDD-1 29EDD1s552 (29EDD-1 Millennium) maintenance 6.98 Hours
Continuous		  
22-Jul-26 07:00 23-Jul-26 16:00 ALTALINK Outage 310p 1352 (310p Sundance) Test 310p1352 CTs 33 Hours
Continuous		  
22-Jul-26 07:00 23-Jul-26 16:00 ALTALINK, EPCOR RB 909L (310p Sundance - 665s Dome) 909LW recloser blocked at Dome e665S 33 Hours
Continuous		  
22-Jul-26 07:00 23-Jul-26 17:00 ALTALINK TE 310p Protection & Control (310p Sundance) isolate protections for CT1352 testing 34 Hours
Daily		  
22-Jul-26 08:00 10-Aug-26 16:00 Syncrude Outage Mildred T6 (Syncrude Mildred Lake), 635 (Syncrude Mildred Lake) repair tap changer in T6 transformer 464 Hours
Continuous		  
22-Jul-26 08:00 23-Jul-26 16:00 ALTALINK Outage 745A1L (975s Dalehurst - 745AL tap), 975s T1 (975s Dalehurst), 975s 745 (975s Dalehurst) salvage underground feeder cables and install new slack span and new riser pole outside of fence

32 Hours
Continuous		  
22-Jul-26 08:00 22-Jul-26 17:00 ALTALINK TE AltaLink Telecom Equipment, 681s RTU/SCADA (681s Bannerman) 681s Firewall Upgrade. Mpls Node A and B upgrade, SCADA SUB LAN Work. Loss of 681s visibility for 2 hours in the timeframe indicated. 776L TPR OOS 50ms during reroute. All other TPR redundant. 9 Hours
Daily		  
22-Jul-26 08:00 23-Jul-26 16:00 ENMAX TE Protection & Control (SS-41) relay protection test - 41RLY138-41.ASW 32 Hours
Continuous		  
22-Jul-26 08:00 22-Jul-26 16:00 ENMAX TE Protection & Control (SS-21) 21PT69-1 outage and power factor test 8 Hours
Continuous		  
22-Jul-26 08:00 23-Jul-26 16:00 ALTALINK TE 281s RTU/SCADA (281s Johnson) Intermittent RTU outages for Techs to complete firmware upgrade and configuration changes on the RTU for Fault reporting implementation. Temporary loss of analogs while firmware and configuration are updated. 32 Hours
Daily		  
22-Jul-26 08:00 22-Jul-26 17:00 ATCO TE 757s RTU/SCADA (757s Battle River), ATCO Telecom Equipment upgrade to maintain system security and to remove any bugs on the system 9 Hours
Continuous		  
22-Jul-26 08:00 23-Jul-26 16:00 ENMAX TE Protection & Control (SS-8) relay protection test - 8RLY138-8.ZE3-E2 A GE 32 Hours
Continuous		  
22-Jul-26 09:00 23-Jul-26 16:00 ALTALINK TE 281s Protection & Control (281s Johnson) implement fault reporting 31 Hours
Daily		  
22-Jul-26 10:00 22-Jul-26 14:00 ALTALINK, TRANSALTA Outage 250p T1 (250p Bighorn Plant), 250p 1 (250p Bighorn Plant) maintenance 4 Hours
Continuous		  
22-Jul-26 10:00 23-Jul-26 17:30 ATCO, OWF2 Outage 804s 703 (804s Wintering Hills), 7L153 (609s Wheatland - 804s Wintering Hills) BREAKER SF6 GL312 TESTING - 703 @ 804S 31.5 Hours
Continuous		  
22-Jul-26 12:31 22-Jul-26 18:00 ATCO, ALTALINK IO 9L939 (77s Sagitawah - 809s Louise Creek) Reclosing Blocked for AltaLink's work on 77s57 5.48 Hours
Continuous		  
22-Jul-26 15:30 22-Jul-26 17:30 ATCO TE ATCO Telecom Equipment, 804s RTU/SCADA (804s Wintering Hills), 963s RTU/SCADA (963s Coyote Lake) UPGRADING COYOTE NET 2, NET 11 AND HIGHLAND SUB SAR OS TO V21, THEN V22
Please see the email that was sent on May 7, 2026 about all the circuits impacted
TRAFFIC interuppted FOR UP TO 90 MINS		 2 Hours
Continuous		  
22-Jul-26 15:30 22-Jul-26 17:30 ATCO RB 7L128 (802s Michichi Creek - 7LA128 tap), 7L128 (963s Coyote Lake - 7LA128 tap) disable reclosing for telecom work 1-00524894 2 Hours
Continuous		  
22-Jul-26 15:30 22-Jul-26 17:30 ATCO RB 7L85 (801s Anderson - ATC 803s Bullpound), 7L85 (803s ATC Bullpound - 7LA85 tap), 7L85 (804s Wintering Hills - 7LA85 tap) disable reclosing for telecom work 1-00524894 2 Hours
Continuous		  
23-Jul-26 07:00 24-Jul-26 17:00 EPCOR Outage RR729 (Rossdale) RR729, DFR upgrade project 34 Hours
Continuous		  
23-Jul-26 08:00 04-Aug-26 16:00 Syncrude Outage 23 (Aurora), 22B (Aurora), 23A (Aurora), 89-26 (Aurora) Zone 10 6yr PM 224 Hours
Continuous		  
23-Jul-26 08:00 23-Jul-26 17:00 ALTALINK TE 308s RTU/SCADA (308s Albchem Beaverhill Creek) split the existing SCADA VLAN from 1 to 1 and 2 9 Hours
Continuous		  
23-Jul-26 08:00 23-Jul-26 12:00 ENMAX Outage 65B240-D134 (SS-65) HV breaker SF6 gas sample - 65B240-D134 4 Hours
Continuous		  
23-Jul-26 08:00 29-Jul-26 16:00 ALTALINK TE 77s RTU/SCADA (77s Sagitawah) RTU database update 152 Hours
Daily		  
23-Jul-26 08:00 25-Jul-26 16:00 Syncrude Outage 211 (Aurora) replace failed interposing relay 56 Hours
Continuous		  
23-Jul-26 08:00 23-Jul-26 16:00 ENMAX TE Protection & Control (SS-2) 2 sub 86 BF-D83 protection outage 8 Hours
Continuous		  
23-Jul-26 08:00 23-Jul-26 16:00 ENMAX Outage 15.62L (SS-15 - SS-16), 16B69-15.62 (SS-16), 15B69-15.62 (SS-15) breaker power factor test - 16B69-15.62 8 Hours
Continuous		  
23-Jul-26 09:00 23-Jul-26 16:00 ATCO TE ATCO Telecom Equipment radio major 7 Hours
Continuous		  
23-Jul-26 10:00 23-Jul-26 14:00 ALTALINK Outage 250p 2 (250p Bighorn Plant) maintenance 4 Hours
Continuous		  
23-Jul-26 10:00 23-Jul-26 16:00 ATCO TE ATCO Telecom Equipment, 861s RTU/SCADA (861s Eureka River) Aprisa radio major Clear Hills to Eureka

 6 Hours
Continuous		  
23-Jul-26 12:00 23-Jul-26 16:00 ENMAX Outage 65B240-D135 (SS-65) HV breaker SF6 gas sample 4 Hours
Continuous		  
24-Jul-26 07:00 24-Jul-26 17:00 EPCOR RB 1055L (629s Argyll Transfer Station - 816s Petrolia) 1055L: Reclose Blocking for Insulator Testing Demo 10 Hours
Continuous		  
24-Jul-26 07:30 29-Jul-26 16:30 ALTALINK Outage 304s 352 (304s Shell Limestone), 304s T2 (304s Shell Limestone) customer maintenance.
129 Hours
Continuous		  
24-Jul-26 08:00 24-Jul-26 17:00 ALTALINK TE 293s RTU/SCADA (293s Bernese) Upgrade Firewall , Telecom Switch, and SCADA VLAN config. Loss of 293s visibility for 2 hours in the timeframe indicated. 9 Hours
Daily		  
24-Jul-26 08:00 24-Jul-26 16:00 ENMAX Outage 40.81L (SS-40 - SS-41), 40.2TR (SS-40), 40B138-40.81 (SS-40), 41B138-40.81 (SS-41), SW83 (SS-40) power factor test 8 Hours
Continuous		  
24-Jul-26 08:00 24-Jul-26 17:30 ALTALINK Outage 719AL (581s Amoco Ricinus - 719L tap), 581s T1 (581s Amoco Ricinus) urgent repair 9.5 Hours
Continuous		  
24-Jul-26 10:00 24-Jul-26 14:00 ATCO RB 705s 144kV Bus (705s Kitscoty) connect 144kV risers for 2000S, energize and let soak over the weekend 4 Hours
Continuous		  

Prepared On:   2026-07-15   15:38:10

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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