Alberta Electric System Operator
System Co-ordination Plan
2026-06-04 to 2026-06-12
Approved Outages

Previous Version
Download CSV

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 30-Jun-26 17:00 ALTALINK Outage 256s C1 (256s Harmattan) forced outage 11,217 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		  
12-Jan-26 07:00 03-Jul-26 17:00 EPCOR TE 330p Protection & Control (330p Genesee) protect blocking, annual relay maintenance and password changes 4,137 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		  
03-Feb-26 09:00 09-Jul-26 17:00 ATCO TE 972s RTU/SCADA (972s Tinchebray) config changes needed throughout the CETO project 3,751 Hours
Continuous		  
09-Feb-26 09:00 09-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 19-Jun-26 16:00 ALTALINK Outage 535s C1 (535s Joffre) breaker maintenance 2,402.25 Hours
Continuous		  
22-Mar-26 13:00 30-Jun-26 17:00 BHE Canada Outage 120s C1 (120s Picture Butte), 120s C2 (120s Picture Butte) forced outage 2,404 Hours
Continuous		  
28-Mar-26 12:00 26-Jun-26 17:00 ATCO TE 833s RTU/SCADA (833s Mariana) updating RTU/station controller configuration during SCADA upgrade project 1,661 Hours
Continuous		  
06-Apr-26 08:00 19-Jun-26 16:00 ALTALINK TE 37s RTU/SCADA (37s North Calder) RTU database updates 1,784 Hours
Continuous		  
25-Apr-26 08:00 27-Jun-26 16:00 ENMAX Outage 1.82L (SS-1 - SS-5), 5B138-1.82 (SS-5) 1 sub Transmission line cut over 1,520 Hours
Continuous		  
25-Apr-26 08:00 27-Jun-26 16:00 ENMAX Outage 1.84L (SS-1 - SS-5), 5B138-1.84 (SS-5) 1 sub Transmission line cut over 1,520 Hours
Continuous		  
27-Apr-26 08:00 12-Jun-26 16:00 Saskpower Outage Sask Power CC904T maintenance 1,112 Hours
Continuous		 AB-SK
01-May-26 17:00 25-Nov-26 17:00 EPCOR Outage T1 (Meadowlark) T1 LCR civil work 4,993 Hours
Continuous		  
11-May-26 18:00 08-Jun-26 08:00 ATCO, ALTALINK Outage 962L (87s Gaetz - 972s Tinchebray) switch needs to remain open until ATCO is ready @ 972s for energization 662 Hours
Continuous		  
11-May-26 18:00 08-Jun-26 08:00 ATCO, ALTALINK Outage 986L (87s Gaetz - 972s Tinchebray) switch needs to remain open until ATCO is ready @ 972s for energization 662 Hours
Continuous		  
19-May-26 07:00 04-Jun-26 07:00 EPCOR Outage T1 (Rossdale), 814s T2 (814s Bellamy), R721 (Rossdale), BR722 (Rossdale) LCR demo 384 Hours
Continuous		  
19-May-26 07:00 28-Aug-26 17:00 EPCOR TE 987s Protection & Control (987s Clover Bar) protection blocking - relay maintenance and bus differential upgrade project 2,434 Hours
Continuous		  
20-May-26 09:00 09-Jun-26 17:00 ALTALINK Outage 275s T2 (275s Jenner), 275s 46 (275s Jenner), 275s 2252 (275s Jenner) maintenance 488 Hours
Continuous		  
25-May-26 07:00 05-Jun-26 17:00 EPCOR Outage 987s T4 (987s Clover Bar), 987s C2408 (987s Clover Bar) DGA monitor replacement and relay maintenance 274 Hours
Continuous		  
25-May-26 08:00 05-Jun-26 14:30 CMH, TCPL TE MH-65L (MHS-7 Brier Park - Cancarb Energy Medicine Hat) maintenance on the LDR-65L-A 270.5 Hours
Continuous		  
25-May-26 08:00 11-Jun-26 16:00 ALTALINK, Travers2SolarLP TE 102s Protection & Control (102s Langdon), 991s Protection & Control (991s Little Bow) settings changes, circuit cutovers and testing associated with the DLR project 416 Hours
Continuous		  
25-May-26 08:00 11-Jun-26 16:00 ALTALINK TE 102s RTU/SCADA (102s Langdon) configuration changes and testing associated with the DLR project 416 Hours
Daily		  
25-May-26 08:00 05-Jun-26 16:00 ENMAX Outage 35.1TR (SS-35) transformer power factor test, secondary cable test, maintenance, relay fault pressure test, reversing switch check, oil sampling 80 Hours
Continuous		  
25-May-26 10:00 05-Jun-26 17:30 ATCO TE 2029s Protection & Control (2029s Heathfield) 10BL04.07 and R1-F871 (12L85) relay firmware upgrade 271.5 Hours
Continuous		  
25-May-26 14:00 06-Jun-26 17:00 ALTALINK Outage 925L (63s Red Deer - 74s Janet), 63s 352 (63s Red Deer), 63s 252 (63s Red Deer), 63s 925X (63s Red Deer) 63s352 breaker replacement to SF6 breaker 291 Hours
Continuous		  
26-May-26 09:30 15-Jul-26 16:30 ALTALINK Outage 157s C1 (157s Lac La Biche) trip test (157s852) 1,207 Hours
Continuous		  
29-May-26 09:00 05-Jun-26 20:00 SUNCOR Outage 29PL9-3 (29EDD-1 Millennium - 29EDD-3), 29EDD-1 29EDD1S11 (29EDD-1 Millennium), 29PS-16 (29EDD-3), 29EDD-1 29EDD1s552 (29EDD-1 Millennium), 29EDD-1 29EDD1SPL9-3 (29EDD-1 Millennium), 29EDD-1 29EDD1s652 (29EDD-1 Millennium), 29EDD-3 29PT-6 (29EDD-3) 29EDD-1 29EDD1S11 - repair broken switch
29EDD1;29CVT-4 system - protection testing, breaker trip testing		 107 Hours
Continuous		  
30-May-26 09:00 13-Jun-26 17:00 ATCO, ALTALINK Outage 972s 906 (972s Tinchebray), 972s 905 (972s Tinchebray), 9L62 (87s Gaetz - 972s Tinchebray) connect new 9L62 to 972S and prepare to energize, string conductors 9L62 from str #3 to substation to 9L62D1, coordinate with AML conductor jumpers and termination at 9L86 Str 409 344 Hours
Continuous		  
01-Jun-26 06:30 05-Jun-26 17:30 ALTALINK RB 809L (320p Keephills - 510s Sunnybrook) 809L - reclose block for aerial washing program 107 Hours
Continuous		  
01-Jun-26 07:00 07-Jun-26 17:00 EPCOR Outage 72PM25 (Poundmaker - Meadowlark), T4 (Poundmaker), PM721 (Poundmaker), PM2402 (Poundmaker), PM2403 (Poundmaker), M726 (Meadowlark), PMAB4 (Poundmaker) tx4 doble and PMAB4/PMDS4/PMDS5 disconnect maintenance 154 Hours
Continuous		  
01-Jun-26 07:00 05-Jun-26 17:00 ALTALINK RB 809L (320p Keephills - 510s Sunnybrook) 809L - reclose block for aerial washing program 106 Hours
Continuous		  
01-Jun-26 07:00 05-Jun-26 17:00 EPCOR Outage T1 (EP Riverview) riverview: TX1 secondary cabinet venting install 106 Hours
Continuous		  
01-Jun-26 07:00 04-Jun-26 17:00 ALTALINK TE 87s RTU/SCADA (87s Gaetz) RTU/HMI change for 962L CETO project 82 Hours
Daily		  
01-Jun-26 07:30 11-Jun-26 09:30 ALTALINK, EPCOR Outage 930L (37s North Calder - Poundmaker), 37s 76 (37s North Calder), 37s Protection & Control (37s North Calder), 37s 81 (37s North Calder), PMDS10 (Poundmaker) protection upgrade (37s76, 37s72, 37s81, 37s86) 242 Hours
Continuous		  
01-Jun-26 08:00 05-Jun-26 16:00 ALTALINK IO 74s Protection & Control (74s Janet) enmax work, 37.82L a&b protection outage 824 Hours
Continuous		  
01-Jun-26 08:00 05-Jun-26 16:00 ENMAX, ALTALINK TE 37.82L (74s Janet - SS-37) relay test 104 Hours
Continuous		  
01-Jun-26 08:00 04-Jun-26 16:00 ENMAX Outage 32.2TR (SS-32) transformer power factor test, maintenance, relay fault pressure test, oil sampling MT, TC 80 Hours
Continuous		  
01-Jun-26 08:00 11-Jun-26 13:00 ALTALINK, EPCOR RB 920L (37s North Calder - 557s Castle Downs) 920LW - reclose block for Altalink working on 37s North Calder 245 Hours
Continuous		  
01-Jun-26 08:00 11-Jun-26 09:00 ALTALINK, EPCOR RB 930L (37s North Calder - Poundmaker) 930L - reclose block for Altalink working on 37s North Calder 241 Hours
Continuous		  
01-Jun-26 08:00 11-Jun-26 09:00 ALTALINK, EPCOR IO 930L (37s North Calder - Poundmaker) 930L outage: Altalink working on 37s North Calder 241 Hours
Continuous		  
01-Jun-26 08:00 11-Jun-26 16:00 ALTALINK TE 102s Protection & Control (102s Langdon) protection outages required for 'B' DC distribution cutover 248 Hours
Continuous		  
01-Jun-26 08:00 25-Jun-26 16:00 ALTALINK TE 37s Protection & Control (37s North Calder) trip test 37s76, 37s81 584 Hours
Continuous		  
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		  
01-Jun-26 10:00 04-Jun-26 18:00 ALTALINK Outage 408L (51s Wainwright - 252s Jarrow), 51s 408N (51s Wainwright), 252s 408 (252s Jarrow) 408L change str 87 and 90 80 Hours
Continuous		  
01-Jun-26 12:30 05-Jun-26 11:30 ALTALINK Outage 650s SVC (650s Hansman Lake) svc maintenance 95 Hours
Continuous		  
02-Jun-26 07:30 06-Jun-26 16:00 CMH Outage MHS-5 MH69-T51 (MH69s5 NE Crescent Height), MHS-5 MH69-505 (MHS-5 NE Crescent Heights) reconditioning oil for transformer MH69-T51 at MHS-5S Northeast Crescent Heights substation 79.5 Hours
Continuous		  
02-Jun-26 08:00 04-Jun-26 18:00 ALTALINK, RESC Outage 1012L (326s Murray Lake - 516s Forty Mile) programmed maintenance
58 Hours
Continuous		  
02-Jun-26 10:00 13-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		  
03-Jun-26 08:00 04-Jun-26 16:00 ENMAX Outage 15B69-15.62 (SS-15), 15.62L (SS-15 - SS-16), 16B69-15.62 (SS-16) HV Breaker Maintenance 32 Hours
Continuous		  
03-Jun-26 10:00 04-Jun-26 16:00 ATCO Outage 970s 703 (970s Bourque) breaker maintenance 30 Hours
Continuous		  
03-Jun-26 10:00 04-Jun-26 17:30 ATCO Outage 963s 701 (963s Coyote Lake), 7L128 (963s Coyote Lake - 7LA128 tap), 963s 7L128D4 (963s Coyote Lake) breaker SF6 GL312 testing 31.5 Hours
Daily		  
04-Jun-26 07:00 05-Jun-26 17:30 ENMAX TE Protection & Control (SS-5) transmission line cut over 34.5 Hours
Daily		  
04-Jun-26 07:00 05-Jun-26 17:30 ENMAX TE Protection & Control (SS-5) 1 sub transmission line cut over 34.5 Hours
Continuous		  
04-Jun-26 07:00 04-Jun-26 19:00 ALTALINK Outage 223L (150s Clyde - 159s Colinton), 150s 223N (150s Clyde), 159s 223 (159s Colinton) CT testing 34 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		  
04-Jun-26 07:15 04-Jun-26 17:45 ALTALINK Outage 1206L (12s Heartland - 89s Ellerslie) line maintenance 10.5 Hours
Continuous		  
04-Jun-26 07:30 09-Jun-26 18:30 ALTALINK IO 760L (163s Amoco Empress - 760AL tap), 163s 760N (163s Amoco Empress) replace all switches at the 7LA760/7L760 junction 131 Hours
Continuous		  
04-Jun-26 07:30 04-Jun-26 17:00 ALTALINK Outage 673L (131s Moon Lake - 283s Violet Grove), 283s 673 (283s Violet Grove), 131s 673 (131s Moon Lake) CT testing 9.5 Hours
Continuous		  
04-Jun-26 07:30 04-Jun-26 17:30 ALTALINK RB 1212L (12s Heartland - 89s Ellerslie) safety requirement - 1206L outage 10 Hours
Continuous		  
04-Jun-26 07:30 04-Jun-26 16:30 ALTALINK, TRANSALTA, Lethbridge RB 725BL (240s McBride Lake - 725L tap), 725L (15s Fort MacLeod - 725BL tap), 725L (674s Bowron - 725BL tap) complete 725BL27 str 27, OHSW re-tie 9 Hours
Daily		  
04-Jun-26 07:30 04-Jun-26 18:30 ALTALINK RB 760L (163s Amoco Empress - 760AL tap) attach temporary bypass 11 Hours
Daily		  
04-Jun-26 07:30 04-Jun-26 17:00 ALTALINK Outage 698s 452 (698s Jackfish) urgent repair; 240kV breaker repair that was forced out in real time 8.5 Hours
Continuous		  
04-Jun-26 08:00 04-Jun-26 18:00 ATCO, ALTALINK RB 7L760 (767s Oyen - 7LC760 tap), 7L760 (7LA760 tap - 7LC760 tap), 760L (760AL tap - 7LA760 tap) connect temporary bypass (7L760/7LA760 junction) for GOI 2-98637, complete phasing checks, close J2
Open jumpers at 7LA760-3		 10 Hours
Continuous		  
04-Jun-26 08:00 09-Jun-26 18:00 ALTALINK Outage 760L (163s Amoco Empress - 760AL tap), 163s 760N (163s Amoco Empress) replace all switches at the 7LA760/7L760 junction 130 Hours
Continuous		  
04-Jun-26 08:00 04-Jun-26 16:00 ATCO Outage 732s 706 (732s Mitsue) CT testing 8 Hours
Continuous		  
04-Jun-26 08:00 04-Jun-26 16:00 ALTALINK TE 288s RTU/SCADA (288s Wolf Creek), 331s RTU/SCADA (331s Ponoka), AltaLink Telecom Equipment repair radio 8 Hours
Continuous		  
04-Jun-26 09:00 04-Jun-26 10:00 ATCO TE ATCO Telecom Equipment telecommunication upgrades
 1 Hour
Continuous		  
04-Jun-26 09:00 04-Jun-26 15:00 ATCO RB 7L90 (813s Little Smoky - 7LA90 tap), 7L90 (741s ATC Fox Creek - 7LA90 tap) change str 58 on 7L90 due to deficient crossarm 6 Hours
Continuous		  
04-Jun-26 10:00 04-Jun-26 12:00 ALTALINK TE AltaLink Telecom Equipment update configuration 2 Hours
Continuous		  
04-Jun-26 10:00 04-Jun-26 14:00 ALTALINK TE 65s RTU/SCADA (65s High River), AltaLink Telecom Equipment MPLS firmware upgrade 4 Hours
Continuous		  
04-Jun-26 12:00 04-Jun-26 17:00 ATCO RB 7L22 (790s Poplar Hill - 7L88 tap), 7L22 (811s Clairmont Lake - 7L88 tap), 7L88 (865s Saddle Hills - 7L22 tap) tap 902s up to 7L88 inside 865s Saddle Hills 5 Hours
Continuous		  
05-Jun-26 07:00 05-Jun-26 17:00 EPCOR TE EP 511s RTU/SCADA (EP 511s Victoria) Annex RTU outage, emergency SMP changes 10 Hours
Continuous		  
05-Jun-26 08:00 05-Jun-26 16:00 ENMAX Outage 33.83L (SS-33 - SS-41), 33B138-33.83 (SS-33), 41B138-33.83 (SS-41) shield wire replacement 8 Hours
Continuous		  
05-Jun-26 08:00 06-Jun-26 17:00 ALTALINK Outage 818s T2 (818s Winefred) maintenance and doble 33 Hours
Continuous		  
05-Jun-26 08:00 05-Jun-26 18:00 ENMAX, ALTALINK Outage 693L (42s Sarcee - SS-10), 10.2TR (SS-10), 10B138-693 (SS-10), 42s 693 (42s Sarcee), SW84 (SS-10) power factor test - 10PT138-693, 10PT138-Z31
breaker trip circuit test - 10B138-693		 10 Hours
Continuous		  
05-Jun-26 08:00 05-Jun-26 18:00 ENMAX, ALTALINK IO 693L (42s Sarcee - SS-10) ENMAX - power factor test - 10PT138-693, 10PT138-Z31, breaker trip circuit test - 10B138-693 10 Hours
Continuous		  
05-Jun-26 08:00 08-Jun-26 16:00 ALTALINK TE 38s RTU/SCADA (38s East Edmonton) updating RTU configuration for 38s761N 80 Hours
Continuous		  
05-Jun-26 08:00 05-Jun-26 18:00 ENMAX Outage 31.84L (SS-31 - SS-32), 32.3TR (SS-32), 32B138-32BT5 (SS-32), 32B138-31.84 (SS-32), 31B138-31.84 (SS-31), 32MD138-32.3TR (SS-32), SW90 (SS-32) spring substation washing, reversing switch check - 32.3-TC 10 Hours
Continuous		  
05-Jun-26 09:00 05-Jun-26 11:00 ATCO TE ATCO Telecom Equipment, 2029s RTU/SCADA (2029s Heathfield) upgrading Heathfield AC (A), DC (A), and Heathfield telecom SARS to V21, then V22 2 Hours
Continuous		  
05-Jun-26 18:00 07-Jun-26 18:00 ALTALINK Outage 761L (38s East Edmonton - 71s Lamoureux), 731L (38s East Edmonton - 746L tap), 215L (38s East Edmonton - 215AL tap), 38s T3 (38s East Edmonton), 38s 761N (38s East Edmonton), 38s 731E (38s East Edmonton), 38s 215N (38s East Edmonton), 71s 761W (71s Lamoureux) install screw piles for T7 and T8, install 38s332, 38s4752 for new T7. 38s761N BF trips to breakers on 138 kV bus 2, replace gas gauge on 38s75 48 Hours
Continuous		  
06-Jun-26 07:00 06-Jun-26 12:00 ENMAX Outage 5.6TR (SS-5) transmission line cut over 5 Hours
Continuous		  
06-Jun-26 08:00 06-Jun-26 12:00 ENMAX Outage 162B138-RB85 (SS-162), 162B138-RB86 (SS-162), 162.3TR (SS-162), 162MD138-162.3TR (SS-162) summer substation washing 4 Hours
Continuous		  
06-Jun-26 08:00 06-Jun-26 18:00 ENMAX Outage 9.83L (SS-9 - SS-43), 43.1TR (SS-43), 9B138-9.83 (SS-9), 43B138-9.83 (SS-43), 43MD138-43.1TR (SS-43) substation structure painting 10 Hours
Continuous		  
06-Jun-26 08:00 06-Jun-26 16:00 ENMAX TE Protection & Control (SS-162) initial cutover of breaker management relays comms to temp switches 8 Hours
Continuous		  
06-Jun-26 08:00 06-Jun-26 16:00 ENMAX TE RTU/SCADA (SS-162) communications outages for DNP 8 Hours
Daily		  
06-Jun-26 12:00 06-Jun-26 18:00 ENMAX Outage 162.4TR (SS-162), 162B138-RB92 (SS-162), 162B138-RB94 (SS-162), 162MD138-162.4TR (SS-162) summer substation washing 6 Hours
Continuous		  
06-Jun-26 12:30 06-Jun-26 14:00 ENMAX Outage 5.1TR (SS-5) transmission line cut over 1.5 Hours
Continuous		  
06-Jun-26 14:30 06-Jun-26 16:00 ENMAX Outage 5.5TR (SS-5) transmission line cut over 1.5 Hours
Continuous		  
07-Jun-26 07:00 07-Jun-26 18:00 ALTALINK, BCH IO 1L275 (799s Coleman - BCH Natal) repairs 11 Hours
Continuous		 AB-BC
07-Jun-26 08:00 07-Jun-26 17:00 ALTALINK, BCH Outage 786L (799s Coleman - BCH Natal) Repairing woodpecker damage on structures 94, 112 and 118
Replacing damaged insulator on structure 121 		9 Hours
Continuous		 AB-BC
07-Jun-26 08:00 07-Jun-26 12:00 ENMAX Outage 11.83L (SS-162 - SS-11), 162B138-RB85 (SS-162), 162B138-RB84 (SS-162) Summer Substation Washing 4 Hours
Continuous		  
07-Jun-26 08:00 08-Jun-26 16:30 ALTALINK Outage 818s T3 (818s Winefred) TX Maintenance, Doble & leak repairs 32.5 Hours
Continuous		  
07-Jun-26 08:00 07-Jun-26 18:00 ENMAX Outage 33.84L (SS-33 - SS-43), 43.2TR (SS-43) Substation Structure Painting 10 Hours
Continuous		  
07-Jun-26 12:00 07-Jun-26 18:00 ENMAX Outage 39.82L (SS-39 - SS-162), 162B138-RB82 (SS-162), 162B138-RB83 (SS-162) Summer Substation Washing 6 Hours
Continuous		  
08-Jun-26 07:00 14-Jun-26 17:00 EPCOR, ALTALINK Outage 657s T3 (657s Summerside), 657s SU2405 (657s Summerside), 657s SU2401 (657s Summerside), 657s SUAB3 (657s Summerside) Summerside: T3 Doble and SUAB3/SUDS2/SUDS12 disconnect maintenance 154 Hours
Continuous		  
08-Jun-26 07:00 10-Jun-26 17:00 EPCOR Outage 72RV2 (EP 511s Victoria - Rossdale), EP 511s V729 (EP 511s Victoria), EP 511s V721 (EP 511s Victoria), RV728 (Rossdale), EP 511s VDS1 (EP 511s Victoria) Victoria: V721 breaker maintenance and RV2 SA doble 58 Hours
Continuous		  
08-Jun-26 07:00 12-Jun-26 17:30 ALTALINK RB 747L (37s North Calder - 711L tap), 747L (99s North St. Albert - 711L tap) reclose block for aerial washing program 106.5 Hours
Continuous		  
08-Jun-26 07:00 08-Jun-26 11:30 EPCOR Outage 987s C2401 (987s Clover Bar) C2401: minimum oil breaker capacitor nameplate pictures 4.5 Hours
Continuous		  
08-Jun-26 07:00 17-Jun-26 13:00 ALTALINK Outage 77s T2 (77s Sagitawah) protection upgrade 222 Hours
Continuous		  
08-Jun-26 07:00 11-Jun-26 17:00 ALTALINK TE 87s RTU/SCADA (87s Gaetz) RTU/HMI change for line 962L CETO project 82 Hours
Continuous		  
08-Jun-26 07:00 08-Jun-26 17:00 EPCOR TE 557s RTU/SCADA (557s Castle Downs) RTU Outage, SCADA maintenance 10 Hours
Continuous		  
08-Jun-26 07:00 25-Sep-26 17:00 EPCOR TE EP 511s Protection & Control (EP 511s Victoria) 72kV breaker fail protection blocking 2,626 Hours
Continuous		  
08-Jun-26 07:15 11-Jun-26 17:45 ALTALINK Outage 704L (51s Wainwright - 478s Tucuman) transmission line maintenance 82.5 Hours
Continuous		  
08-Jun-26 07:30 11-Jun-26 16:30 ALTALINK RB 757L (17s Benalto - 758L tap), 757L (297s Rimbey - 758L tap), 758L (534s Eckville - 757L tap) 758L4-21 crossarm/structure replacement 81 Hours
Daily		  
08-Jun-26 08:00 12-Jun-26 20:00 SUNCOR Outage 29EDD-94 29PP-97 260kV Bus (29EDD-94 Voyageur), 29EDD-94 29-952-9701 (29EDD-94 Voyageur), 29EDD-94 29-952-9712 (29EDD-94 Voyageur), 29EDD-94 29-952-9706 (29EDD-94 Voyageur), 29EDD-94 29-952-9707 (29EDD-94 Voyageur), 29EDD-94 29PS-386 (29EDD-94 Voyageur), 29EDD-94 29PS-638 (29EDD-94 Voyageur), 29EDD-94 29PS-395 (29EDD-94 Voyageur), 29EDD-94 29PS-629 (29EDD-94 Voyageur) 29EDD94, 29PT-412B oil leak (29PP-97 260KV outage) - leak repair and top up (9001051293) TDEC 108 Hours
Continuous		  
08-Jun-26 08:00 26-Jun-26 16:00 ENMAX Outage 37.2TR (SS-37) Tap changer overhaul. Leak repair. Reversing Switch Check - 37.2-TC. Oil Sampling Outage Required - 37.2-TC 440 Hours
Continuous		  
08-Jun-26 08:00 11-Jun-26 16:00 ATCO RB 7L10 (754s Ksituan River - 7LA10 tap), 7L10 (730s Rycroft - 7LA10 tap) 7L10 TCM pole replacement 80 Hours
Continuous		  
08-Jun-26 08:00 11-Jun-26 16:00 ATCO Outage 7L48 (794s Valleyview - 7LA48 tap), 794s 703 (794s Valleyview) pole replacement from test and treat 80 Hours
Continuous		  
08-Jun-26 08:00 19-Jun-26 14:30 CMH, TCPL TE MH-65L (MHS-7 Brier Park - Cancarb Energy Medicine Hat) maintenance on the LDR-65L-B 270.5 Hours
Continuous		  
08-Jun-26 08:00 08-Jun-26 12:00 ENMAX Outage 162B240-RB132 (SS-162) HV breaker SF6 gas sample 4 Hours
Continuous		  
08-Jun-26 08:00 25-Jun-26 10:00 ALTALINK, ATCO Outage 87s 1252 (87s Gaetz), 87s 1652 (87s Gaetz), 87s T2 (87s Gaetz), 87s 240kV East Bus (87s Gaetz), 87s 1552 (87s Gaetz), 87s 1952 (87s Gaetz), 962L (87s Gaetz - 972s Tinchebray), 986L (87s Gaetz - 972s Tinchebray), 87s 34 (87s Gaetz), 9L62 (87s Gaetz - 972s Tinchebray), 9L86 (87s Gaetz - 972s Tinchebray) Completing all telecom work & protection testing with ATCO 514 Hours
Continuous		  
08-Jun-26 08:00 08-Jun-26 16:00 ALTALINK TE 651s RTU/SCADA (651s Kirby) split the existing SCADA VLAN from 1 to 1 and 2
8 Hours
Continuous		  
08-Jun-26 08:00 11-Jun-26 16:00 ALTALINK TE 698s RTU/SCADA (698s Jackfish), AltaLink Telecom Equipment firewall replacement, MPLS 7705 A&B Node upgrade, raw socket upgrade, LAN switch replacement 80 Hours
Daily		  
08-Jun-26 08:00 11-Jun-26 16:00 ALTALINK TE 818s Winefred RTU/SCADA, AltaLink Telecom Equipment firewall replacement, MPLS 7705 A node upgrade, raw socket upgrade, LAN switch replacement 80 Hours
Continuous		  
08-Jun-26 08:00 12-Jun-26 16:00 ALTALINK IO 74s Protection & Control (74s Janet) Enmax work 104 Hours
Daily		  
08-Jun-26 08:00 12-Jun-26 16:00 ENMAX, ALTALINK TE 24.83L (74s Janet - SS-24) 24.83L A and B protection outage 104 Hours
Continuous		  
08-Jun-26 08:00 11-Jun-26 16:00 ENMAX Outage 32.1TR (SS-32) transformer power factor test 80 Hours
Continuous		  
08-Jun-26 08:00 11-Jun-26 16:00 ENMAX Outage 38.1TR (SS-38) transformer power factor test 80 Hours
Continuous		  
08-Jun-26 08:00 12-Jun-26 16:00 ATCO RB 7L68 (730s Rycroft - 811s Clairmont Lake) emergency pole change on 7L03 and 7L69 str 437 from our line inspecting 104 Hours
Continuous		  
08-Jun-26 09:00 21-Jun-26 20:00 SUNCOR Outage 29EDD-34 29PT-341 (29EDD-34), 29EDD-34 29-952-142 (29EDD-34), 29EDD-34 29-952-143 (29EDD-34), 29EDD-34 29-652-10200T (29EDD-34), 29EDD-34 29-652-10301 (29EDD-34), 29EDD-34 29-652-10302 (29EDD-34), 29EDD-34 29-652-10303 (29EDD-34), 29EDD-34 29PS-0375 (29EDD-34), 29EDD-34 29PS-0380 (29EDD-34), 29EDD-34 29PS-0381 (29EDD-34), 29EDD-34 29PS-0383 (29EDD-34), 29EDD-34 29PS-609 (29EDD-34) 10 year PM on 29EDD34;29PT-341 system and 5 year, 10 year PM on 29EDD34;29PP-103 system
 323 Hours
Continuous		  
08-Jun-26 09:00 08-Jun-26 10:00 ATCO TE ATCO Telecom Equipment, 705s RTU/SCADA (705s Kitscoty), 716s RTU/SCADA (716s Lloydminster) Kitscoty_T-Telecom- upgrade Kitscoty tower 1 Hour
Continuous		  
08-Jun-26 09:00 22-Jun-26 17:00 ATCO Outage 865s 701T (865s Saddlehills) protection and scada upgrade on 865S 344 Hours
Continuous		  
08-Jun-26 09:00 08-Jun-26 10:00 ATCO TE ATCO Telecom Equipment, 794s RTU/SCADA (794s Valleyview) Valleyview_T-Telecom- Valleyview tower net 1 SAR OS upgrade to V21, then V22 1 Hour
Continuous		  
08-Jun-26 09:00 12-Jun-26 16:00 ATCO Outage 7L03 (731s Elmworth - 7L09 tap) TCM pole changes from test and treat 103 Hours
Continuous		  
08-Jun-26 09:00 08-Jun-26 16:00 ATCO TE ATCO Telecom Equipment THE DS1 CARD AT ANDERSON IS FAULTY 7 Hours
Continuous		  
08-Jun-26 09:30 10-Jun-26 17:30 ATCO Outage 801s 909 (801s Anderson) Breaker minimum oil HLR complete testing 56 Hours
Continuous		  
08-Jun-26 10:00 09-Jun-26 16:00 ATCO Outage 970s 706 (970s Bourque) breaker maintenance 30 Hours
Continuous		  
08-Jun-26 10:00 09-Jun-26 16:00 ATCO Outage 849s 901 (849s Joslyn Creek) breaker maintenance, PRC-005 trip coil testing 30 Hours
Continuous		  
08-Jun-26 12:00 08-Jun-26 16:00 ENMAX Outage 162B240-RB135 (SS-162) HV breaker SF6 gas sample 4 Hours
Continuous		  
08-Jun-26 12:00 08-Jun-26 17:00 EPCOR Outage 987s C2402 (987s Clover Bar) minimum oil breaker capacitor nameplate pictures 5 Hours
Continuous		  
08-Jun-26 12:30 11-Jun-26 17:00 ALTALINK Outage 283s 835E (283s Violet Grove) Replace 283s835E Leaking CT 76.5 Hours
Continuous		  
08-Jun-26 13:00 11-Jun-26 17:00 ALTALINK TE 283s Protection & Control (283s Violet Grove) Techs to assist Subs with CT3 (283s853E) replacement
76 Hours
Continuous		  
08-Jun-26 13:00 11-Jun-26 16:30 ALTALINK Outage 39s T2 (39s Bickerdike) Transformer maintenance 75.5 Hours
Continuous		  
08-Jun-26 14:00 11-Jun-26 16:00 ALTALINK Outage 17s 85 (17s Benalto), 17s T2 (17s Benalto) 17s85 CT Replacement 74 Hours
Continuous		  
09-Jun-26 07:00 09-Jun-26 11:30 ALTALINK, EPCOR Outage EP 803s L2404 (EP 803s Lambton) L2404: Minimum Oil Breaker Capacitor Nameplate Pictures 4.5 Hours
Continuous		  
09-Jun-26 07:00 09-Jun-26 18:00 ALTALINK RB 827L (28s West Brooks - 121s Brooks) proximity during 814L work 11 Hours
Continuous		  
09-Jun-26 07:00 13-Jul-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) relay testing 826.5 Hours
Continuous		  
09-Jun-26 07:00 16-Jun-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-Jun-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) isolating 50BF/605 for relay testing 178.5 Hours
Continuous		  
09-Jun-26 07:00 16-Jun-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) minor setting changes on 21B/6L11 relay 178.5 Hours
Continuous		  
09-Jun-26 07:00 16-Jun-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) minor setting changes on 21B/6L11 relay 178.5 Hours
Continuous		  
09-Jun-26 07:00 16-Jun-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) minor setting changes on 21B/6L11 relay 178.5 Hours
Continuous		  
09-Jun-26 07:00 16-Jun-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) minor settings changes on 21B/6L126 178.5 Hours
Continuous		  
09-Jun-26 07:00 12-Jun-26 17:00 ALTALINK TE 296s RTU/SCADA (296s Rosyth) SCADA change for T3 revenue meter replacement 82 Hours
Daily		  
09-Jun-26 07:00 10-Jun-26 18:00 ALTALINK RB 1325L (510s Sunnybrook - AML 511s Crossings) install patch rod on OPGW in span 487 using HEC procedures 35 Hours
Continuous		  
09-Jun-26 07:30 09-Jun-26 12:00 ALTALINK Outage 927L (102s Langdon - 356s Milo) CT cutovers to new DLR protections. LTO testing to RAS protections 4.5 Hours
Continuous		  
09-Jun-26 08:00 09-Jun-26 17:00 ATCO TE ATCO Telecom Equipment, 710s RTU/SCADA (710s Vermilion) Mannville_T-Telecom- radio PM 9 Hours
Continuous		  
09-Jun-26 08:00 09-Jun-26 17:00 ALTALINK Outage 121s 814W (121s Brooks), 814L (28s West Brooks - 121s Brooks) Replacing damaged insulator structure 25 9 Hours
Continuous		  
09-Jun-26 08:00 09-Jun-26 17:00 ALTALINK Outage 118s C1 (118s Canmore), 118s T1 (118s Canmore), 118s 54W (118s Canmore), 118s 18 (118s Canmore), 54L (118s Canmore - 85L tap), 118s 138kV Bus 1 (118s Canmore) 118s18 Maintenance and Weed spraying in Cap bank 9 Hours
Continuous		  
09-Jun-26 08:00 09-Jun-26 12:00 ENMAX Outage 162B240-RB136 (SS-162) HV Breaker SF6 Gas Sample 4 Hours
Continuous		  
09-Jun-26 08:00 09-Jun-26 16:00 ALTALINK TE 678s RTU/SCADA (678s Okotoks) investigate a Battery electrolyte alarm and determine why the alarm is in solid potentially replacing components 8 Hours
Continuous		  
09-Jun-26 09:00 09-Jun-26 16:00 ATCO, NextEra TE ATCO Telecom Equipment, 114s RTU/SCADA (114s Ghost Pine) GhostPine_T-Telecom/Elnora_T-Telecom- RADIO 7 Hours
Continuous		  
09-Jun-26 09:00 09-Jun-26 10:00 ATCO TE ATCO Telecom Equipment, ATC 793s RTU/SCADA (ATC 793s West Peace River) West Peace_S-Telecom- upgrading west peace net 1 SAR OS TO V21 1 Hour
Continuous		  
09-Jun-26 09:00 09-Jun-26 17:00 ALTALINK TE 301s Protection & Control (301s Queensland) DSP card replacements and firmware upgrades 8 Hours
Continuous		  
09-Jun-26 09:00 09-Jun-26 17:00 ATCO, ALTALINK RB 9L55 (AML 852s Round Hill - 885s McMillan) Altalink request 8 Hours
Continuous		  
09-Jun-26 09:00 09-Jun-26 16:00 ALTALINK TE 118s Protection & Control (118s Canmore) 754L @ 118s Relays A21 & B21 will both be disabled. 54L @ 118s Relays A21 & B21 will both be disabled. The 81 Underfrequency Relay for the UFLS will also be disabled. This is all for the outage to 118s 138kV Bus 1 outage. 7 Hours
Continuous		  
09-Jun-26 09:15 09-Jun-26 12:30 ALTALINK Outage 852s 152 (852s Round Hill) breaker maintenance and first trip 3.25 Hours
Continuous		  
09-Jun-26 09:30 11-Jun-26 17:00 ALTALINK Outage 415s 21 (415s Drywood), 415s T1 (415s Drywood), 164L (103s Goose Lake - 415s Drywood), 415s 164 (415s Drywood) 415sT1 testing DGA on bushings. 415s164 Maint. 415s21 Breaker Maint. 55.5 Hours
Continuous		  
09-Jun-26 12:00 09-Jun-26 17:00 EPCOR Outage EP 803s L2405 (EP 803s Lambton) L2405: Minimum Oil Breaker Capacitor Nameplate Pictures 5 Hours
Continuous		  
09-Jun-26 12:00 09-Jun-26 16:00 ALTALINK Outage 924L (102s Langdon - 356s Milo) CT cutovers to new DLR protections. LTO testing to RAS protections 4 Hours
Continuous		  
09-Jun-26 12:00 09-Jun-26 16:00 ENMAX Outage 162B138-RB84 (SS-162) HV breaker SF6 gas sample and breaker dashpot checks 4 Hours
Continuous		  
09-Jun-26 13:15 09-Jun-26 16:30 ALTALINK Outage 852s 252 (852s Round Hill) breaker maintenance, heater replacement & first trip 3.25 Hours
Continuous		  
10-Jun-26 06:00 10-Jun-26 17:00 ATCO TE ATCO RTU/SCADA backup control center activation 11 Hours
Continuous		  
10-Jun-26 07:00 10-Jun-26 18:00 ENMAX Outage 33.84L (SS-33 - SS-43), 33B138-33.84 (SS-33), 43B138-33.84 (SS-43) 33.84L cable testing,test equipment to stay on line after energization 11 Hours
Continuous		  
10-Jun-26 07:00 10-Jun-26 19:00 ALTALINK Outage 296s 152 (296s Rosyth), 296s T3 (296s Rosyth) 296s T3 CT ratio changes and new revenue meter 12 Hours
Continuous		  
10-Jun-26 07:30 11-Jun-26 17:00 ALTALINK Outage 157s T2 (157s Lac La Biche) transformer maintenance, 157s32/34 fuse cutout replacements 33.5 Hours
Continuous		  
10-Jun-26 08:00 10-Jun-26 17:00 ATCO Outage 7L760 (7LA760 tap - 7LC760 tap) install 7L760/7LA760 junction temporary temp bypass 9 Hours
Continuous		  
10-Jun-26 08:00 10-Jun-26 17:00 ATCO, ALTALINK, ENEL TE ATCO Telecom Equipment, 918s RTU/SCADA (918s Bauer), 526s RTU/SCADA (526s Buffalo Creek), 708s RTU/SCADA (708s Grizzly Bear) radio maintenance 9 Hours
Continuous		  
10-Jun-26 08:00 11-Jun-26 16:00 ENMAX Outage 1.80L (SS-1 - SS-28), 28B138-1.80 (SS-28), 1MD138-1.80 (SS-1) hv breaker maintenance 28B138-1.80 32 Hours
Continuous		  
10-Jun-26 08:00 13-Jun-26 16:00 SUNCOR TE 29EDD-34 RTU/SCADA (29EDD-34) add duplicate power sources 80 Hours
Continuous		  
10-Jun-26 08:00 10-Jun-26 18:00 SUNCOR TE 29EDD-18 RTU/SCADA (29EDD-18 Firebag) download new configuration to RTU 10 Hours
Continuous		  
10-Jun-26 08:00 10-Jun-26 18:00 ENMAX IO Protection & Control (SS-32) 32sub SSTR32-1, SSTR32-2, outage, sump pump AC power connection 10 Hours
Continuous		  
10-Jun-26 09:00 10-Jun-26 16:00 ALTALINK, TRANSALTA Outage 32s 22 (32s Barrier), 32s T1 (32s Barrier), 32s 1 (32s Barrier), 32s 2 (32s Barrier) 32s22 LTB PRC5 minor maintenance 7 Hours
Continuous		  
10-Jun-26 09:00 19-Jun-26 17:00 BCH Outage 2L294 (BCH A. A. Lambert - BCH Cranbrook), T3 (BCH Cranbrook), T7 (BCH Cranbrook) insulator replacement 224 Hours
Continuous		 AB-BC
10-Jun-26 10:00 11-Jun-26 16:00 ATCO Outage 970s 707 (970s Bourque) breaker maintenance 30 Hours
Continuous		  
10-Jun-26 10:00 11-Jun-26 16:00 ATCO Outage 849s 904 (849s Joslyn Creek) breaker maintenance, PRC-005 trip coil testing 30 Hours
Continuous		  
10-Jun-26 12:30 10-Jun-26 18:30 ALTALINK RB 760L (163s Amoco Empress - 760AL tap) HOP to disconnect 7L760/7LA760 temporary junction bypass. 6 Hours
Daily		  
10-Jun-26 13:00 10-Jun-26 18:00 ATCO, ALTALINK RB 7L760 (767s Oyen - 7LC760 tap), 7L760 (7LA760 tap - 7LC760 tap), 760L (760AL tap - 7LA760 tap) disconnect 7L760/7LA760 temporary junction bypass. 5 Hours
Continuous		  
10-Jun-26 23:00 11-Jun-26 03:00 ALTALINK Outage 62s T1 (62s Brazeau Plant), 62s 1 (62s Brazeau Plant) maintenance 3 Hours
Continuous		  
11-Jun-26 03:00 11-Jun-26 07:00 ALTALINK Outage 62s T2 (62s Brazeau Plant), 62s 2 (62s Brazeau Plant) maintenance 3 Hours
Continuous		  
11-Jun-26 07:00 12-Jun-26 18:00 ALTALINK TE 944L (132s Ware Junction - 275s Jenner), AltaLink Telecom Equipment Tower re-alignment at 1080S Raptor, requires 944L outage 35 Hours
Continuous		  
11-Jun-26 07:00 12-Jun-26 17:00 ALTALINK Outage 944L (132s Ware Junction - 275s Jenner), 944AL (1080s Raptor - 944AL tap), 1080s 240CB1 (1080s Raptor), 1080s 240MDS1 (1080s Raptor), 1080s 240MDS3(1080s Raptor) dish realignment 34 Hours
Continuous		  
11-Jun-26 08:00 11-Jun-26 16:00 ENMAX Outage 15.62L (SS-15 - SS-16), 15B69-15.62 (SS-15), 16B69-15.62 (SS-16) shield wire replacement 8 Hours
Continuous		  
11-Jun-26 08:00 11-Jun-26 16:00 ENMAX Outage 16.60L (SS-16 - SS-34) shield wire replacement 8 Hours
Continuous		  
11-Jun-26 08:00 11-Jun-26 17:00 ATCO TE ATCO Telecom Equipment
Bauer Sub facing Buffalo Creek Sub		 9 Hours
Continuous		  
11-Jun-26 08:00 11-Jun-26 12:00 ENMAX Outage 33.84L (SS-33 - SS-43) 33.84L Cable testing. Remove Test equipment from line. 4 Hours
Continuous		  
11-Jun-26 08:00 11-Jun-26 16:00 ALTALINK TE 520s RTU/SCADA (520s Bennett), AltaLink Telecom Equipment 7705 A and B node upgrade
8 Hours
Continuous		  
11-Jun-26 09:00 11-Jun-26 16:00 ATCO TE ATCO Telecom Equipment, 843s RTU/SCADA (843s Bigknife Creek) Big Knife/Cordel Telecom
Installation 		7 Hours
Continuous		  
11-Jun-26 09:30 12-Jun-26 17:30 ATCO Outage 772s 601C (772s Youngstown) breaker SF6 GL312 testing 32 Hours
Continuous		  
11-Jun-26 10:30 11-Jun-26 13:30 ALTALINK Outage 37s 88 (37s North Calder) breaker fail trip testing 3 Hours
Continuous		  
11-Jun-26 23:00 12-Jun-26 05:00 ALTALINK Outage 534s 138kV Bus 1 (534s Eckville), 297s 138kV Bus 1 (297s Rimbey), 297s 138kV Bus 2 (297s Rimbey), 757L (17s Benalto - 758L tap), 757L (297s Rimbey - 758L tap), 758L (534s Eckville - 757L tap), 297s T1 (297s Rimbey), 297s T2 (297s Rimbey), 534s T1 (534s Eckville), 297s 757 (297s Rimbey), 534s 758 (534s Eckville), 17s 757N (17s Benalto), 534s 40 (534s Eckville), 297s 189 (297s Rimbey), 297s 389 (297s Rimbey) 757L199 replace crossarm and insulators,17s dead end insulator replacement 6 Hours
Continuous		  
12-Jun-26 07:00 12-Jun-26 17:00 EPCOR TE 330p RTU/SCADA (330p Genesee) SCADA repair 10 Hours
Continuous		  
12-Jun-26 08:00 12-Jun-26 16:00 ENMAX Outage 15.60L (SS-15 - SS-21), 15B69-15.60 (SS-15), 21B69-15.60 (SS-21) shield wire replacement. 21.61L (oos) 8 Hours
Continuous		  
12-Jun-26 08:00 12-Jun-26 16:00 ENMAX Outage 21.61L (SS-21 - SS-34), 16B69-16.61 (SS-16), 27B69-16.61 (SS-27) shield wire replacement 8 Hours
Continuous		  
12-Jun-26 08:00 12-Jun-26 12:00 ENMAX Outage 32.83L (SS-32 - SS-40), 40.1TR (SS-40) Summer Substation Washing. Reversing Switch Check - 40.1-TC 4 Hours
Continuous		  
12-Jun-26 08:00 14-Jun-26 16:00 ALTALINK TE 72s RTU/SCADA (72s Leismer) updating SCADA LAN switch settings
56 Hours
Continuous		  
12-Jun-26 08:00 13-Jun-26 16:00 ENMAX TE RTU/SCADA (SS-162) communications outages 32 Hours
Daily		  
12-Jun-26 08:00 12-Jun-26 16:00 ALTALINK TE AltaLink RTU/SCADA (AltaLink) updating RTU config 8 Hours
Continuous		  
12-Jun-26 08:00 12-Jun-26 16:00 ALTALINK TE AltaLink Telecom Equipment install power supply 8 Hours
Continuous		  
12-Jun-26 12:00 12-Jun-26 18:00 ENMAX Outage 40.81L (SS-40 - SS-41), 40.2TR (SS-40) Summer Substation Washing 6 Hours
Continuous		  

Prepared On:   2026-06-03   14:51:43

This document and the information contained herein are based upon information and data which by their nature contain a degree of uncertainty and are subject to change. In addition, this document may contain information and data from public sources and/or third parties, which have been assumed to be accurate and complete and have not been verified. Accordingly, the Independent System Operator, operating as the Alberta Electric System Operator (the "AESO") makes no warranty, representation or guarantee, express or implied, with respect to this document or the information contained herein, including, but not limited to, any warranty, representation or guarantee of accuracy, completeness, timeliness, reliability, availability, absence of computer virus, non- infringement, merchantability or suitability for any purpose. Under no circumstances will the AESO, its members, officers, employees, contractors or agents, or any of their respective affiliates, be liable for any errors or omissions in, or any losses, damages or claims whatsoever, whether in contract, tort or otherwise, arising from use of or reliance upon, this document or any information contained herein.

© 2009 Alberta Electric System Operator. All rights reserved