Alberta Electric System Operator
System Co-ordination Plan
2026-10-15 to 2026-10-23
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		  
20-Mar-25 08:00 04-Nov-26 15:00 ALTALINK Outage 256s C1 (256s Harmattan) forced outage 14,264 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 28-Oct-26 20:00 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		  
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		  
01-May-26 17:00 19-Feb-27 17:00 EPCOR Outage T1 (Meadowlark) T1 LCR civil work 4,993 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 03-Nov-26 18:00 ACCIONA, ENBRIDGE, ICPCL Outage 139s C1 (139s Hillridge) forced outage 3,577.92 Hours
Continuous		  
08-Jun-26 07:00 15-Jan-27 17:00 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 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		  
10-Jul-26 08:00 18-Nov-26 16:00 Syncrude Outage 815 (Syncrude Mildred Lake) replace 72 kV underground feeder cables on west mine feeder 2,696 Hours
Continuous		  
14-Jul-26 08:00 22-Oct-26 17:00 ALTALINK Outage 287s 552 (287s Hazelwood) 287s552 must be open during 443L and 417L outage for the 214s AIS to work properly 1,905 Hours
Continuous		  
15-Jul-26 14:01 22-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		  
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		  
03-Aug-26 08:00 30-Oct-26 16:00 ALTALINK TE 55s RTU/SCADA (55s Olds) adding/testing new alarms & controls associated with the 55s P&C 2,120 Hours
Daily		  
02-Sep-26 07:00 04-Nov-26 10:00 ALTALINK, TRANSALTA Outage 320p GT3 (320p Keephills) maintenance 1,184 Hours
Continuous		  
08-Sep-26 07:00 18-Dec-26 17:00 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 17:00 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 17:00 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 27-Nov-26 16:00 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 17:00 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 31-Dec-26 23:59 NWE Outage 2375 (NWE Marias) breaker hydraulic oil pump repeatedly 2,595.1 Hours
Continuous		 AB-MATL
15-Sep-26 11:00 05-Nov-26 19:00 ATCO TE 888s RTU/SCADA (888s Dover) RTU updates for 9L74 protection upgrade 1,233 Hours
Continuous		  
21-Sep-26 09:00 22-Oct-26 08:00 ALTALINK Outage 417L (55s Olds - 281s Johnson), 281s 1152 (281s Johnson), 281s 1252 (281s Johnson), 55s 417 (55S Olds) upgrade 417L protections at 281s. 743 Hours
Continuous		  
21-Sep-26 10:00 30-Oct-26 14:00 ATCO Outage 706s 701T (706s Irish Creek), 706s 701 (706s Irish Creek) breaker, transformer and voltage regulator maintenance 268 Hours
Continuous		  
22-Sep-26 09:00 19-Oct-26 17:00 ATCO TE 743s Protection & Control (743s Sarah Lake) CSP needed for 86-94/700BS1 to test protection logic for breaker 702 656 Hours
Continuous		  
22-Sep-26 09:00 19-Oct-26 17:00 ATCO TE 743s Protection & Control (743s Sarah Lake) 21B/7L67 relay testing and wiring 656 Hours
Continuous		  
22-Sep-26 09:00 19-Oct-26 17:00 ATCO TE 743s Protection & Control (743s Sarah Lake) 50BF/702 relay testing and wiring 656 Hours
Continuous		  
23-Sep-26 12:00 19-Oct-26 11:00 ATCO Outage 7L67 (743s Sarah Lake - 824s Fieldgate), 743s 702 (743s Sarah Lake), 743s 702A (743s Sarah Lake) 743S Sarah lake rebuild. replace bkr 702, gang switches 702A, 7L67D2 623 Hours
Continuous		  
24-Sep-26 08:00 16-Oct-26 17:00 SUNCOR Outage 29PL7-2 (29EDD-18 Firebag - 29EDD-63), 29EDD-63 29PT-179 (29EDD-63 Firebag Co-Gen), 29EDD-18 29PT-204 (29EDD-18 Firebag), 29EDD-63 30-252-11301 (29EDD-63), 29EDD-63 91-152-500201 (29EDD-63), 29EDD-18 29-752-105 (29EDD-18 Firebag), 29EDD-18 29-752-104 (29EDD-18 Firebag), 29EDD-18 29-752-106 (29EDD-18 Firebag) replace air bladder and 29PT-179 T60 replacement 537 Hours
Continuous		  
28-Sep-26 07:00 31-Dec-26 17:00 EPCOR Outage 816s T1 (816s Petrolia) emergency outage - tap changer gassing 2,267 Hours
Continuous		  
28-Sep-26 11:00 30-Oct-26 19:00 ATCO TE 960s RTU/SCADA (960s Birchwood Creek) updates to RTU for 9L74 776 Hours
Continuous		  
28-Sep-26 12:00 15-Oct-26 17:00 ALTALINK, Lethbridge Outage 725L (674s Bowron - 725BL tap), 674s 725W (674s Bowron), 674s 1 (674s Bowron), 674s T1 (674s Bowron) OE outage on 725lw required to replace 674s1-disconnect switch, 674sPT4-CVT, 674sPTB2-3phase CVT's 413 Hours
Continuous		  
28-Sep-26 12:05 15-Oct-26 17:00 ALTALINK, Lethbridge IO 725L (674s Bowron - 725BL tap) City of Lethbridge outage on 725lw required to replace 674s1-Disconnect Switch, 674sPT4-CVT, 674sPTB2-3phase CVT's 412.92 Hours
Continuous		  
03-Oct-26 07:00 16-Oct-26 17:00 ALTALINK Outage 422s 700 (422s Westwood), 746s 700N (746s Sherwood Park), 700L (422s Westwood - 746L tap), 700L (746s Sherwood Park - 746L tap) replacement of cross arms and insulators and other minor component replacements 322 Hours
Continuous		  
03-Oct-26 12:30 20-Oct-26 12:00 ENMAX Outage 1.81L (SS-1 - SS-20), 20B138-1.81 (SS-20) construction 1.81L river crossing, drill north side, set both sides and string 407.5 Hours
Continuous		  
04-Oct-26 12:00 06-Nov-26 18:00 ENMAX Outage 8.6TR (SS-8) fire alarm system upgrade 799 Hours
Continuous		  
05-Oct-26 08:00 28-Nov-26 19:00 ALTALINK Outage 62s T2 (62s Brazeau Plant), 62s 2 (62s Brazeau Plant) maintenance 1,295 Hours
Continuous		  
05-Oct-26 08:00 15-Oct-26 16:00 ALTALINK Outage 443L (55s Olds - 214s Innisfail), 214s 443 (214s Innisfail), 55s 443 (55S Olds) update line protections for 443L 248 Hours
Continuous		  
05-Oct-26 08:00 18-Oct-26 19:00 ATCO RB 13L50 (2029s Heathfield - 2075s Newell) installing SVDs from str 1-775, then 975-1387 323 Hours
Continuous		  
05-Oct-26 08:00 15-Oct-26 16:00 ALTALINK TE 431s RTU/SCADA (431s Hussar) new alarms and SCADA metering for C1 protection 248 Hours
Daily		  
05-Oct-26 09:00 16-Oct-26 17:00 BCH, BPA Outage 5L52 (BPA Custer - BCH Ingledow) 5L52 tower replacements 272 Hours
Continuous		 AB-BC
05-Oct-26 10:00 16-Oct-26 17:30 ATCO Outage 6L09 (767s Oyen - 6L21 tap), 7L760 (767s Oyen - 7LC760 tap), 767s Oyen leak repairs on 701T, breaker testing, transformer testing, and switch repairs
271.5 Hours
Continuous		  
05-Oct-26 11:00 16-Oct-26 16:00 ALTALINK TE 478s RTU/SCADA (478s Tucuman) RTU database update 269 Hours
Daily		  
05-Oct-26 12:00 16-Oct-26 12:00 ATCO Outage 786s SVC (786s High Level), 786s 703T (786s High Level), 786s 703 (786s High Level) ET 1136310 786S High Level SVC DFR upgrade
96 Hours
Continuous		  
05-Oct-26 12:00 16-Oct-26 12:00 ATCO TE 786s RTU/SCADA (786s High Level) ET 1136310 786S high level SVC DFR upgrade 264 Hours
Continuous		  
06-Oct-26 08:00 15-Oct-26 17:00 ATCO TE 875s RTU/SCADA (875s Algar), 875s Protection & Control (875s Algar) site de energized 225 Hours
Continuous		  
07-Oct-26 08:00 15-Oct-26 16:00 Syncrude Outage Mildred Lake 72kV Bus B (Sycrude Mildred Lake), ML1 (D05 - Syncrude Mildred Lake), Mildred T1 (Syncrude Mildred Lake), Mildred T2 (Syncrude Mildred Lake), Mildred T3 (Syncrude Mildred Lake), Mildred T16 (Syncrude Mildred Lake), Mildred T19 (Syncrude Mildred Lake), Mildred T14 (Syncrude Mildred Lake), 135 (Syncrude Mildred Lake), 2235 (Syncrude Mildred Lake), 1335 (Syncrude Mildred Lake), 235 (Syncrude Mildred Lake), 3235 (Syncrude Mildred Lake), 335 (Syncrude Mildred Lake), 1935 (Syncrude Mildred Lake), 1635 (Syncrude Mildred Lake), 1435 (Syncrude Mildred Lake), 915 (Syncrude Mildred Lake), 815 (Syncrude Mildred Lake), 1225 (Syncrude Mildred Lake), D05 76 (D05), 1934 (Syncrude Mildred Lake), 1434 (Syncrude Mildred Lake), 334 (Syncrude Mildred Lake), 814 (Syncrude Mildred Lake), 134 (Syncrude Mildred Lake), 1634 (Syncrude Mildred Lake), 234 (Syncrude Mildred Lake) bus maintenance 512 Hours
Continuous		  
07-Oct-26 15:00 15-Oct-26 17:00 ALTALINK Outage 431s 152 (431s Hussar), 431s C1 (431s Hussar) new cap bank protection 194 Hours
Continuous		  
08-Oct-26 08:00 15-Oct-26 17:00 ATCO, ALTALINK RB 12L41 (510s Sunnybrook - 939s Livock) installing replacement corona rings on 12L44 due to failure 177 Hours
Continuous		  
08-Oct-26 08:00 15-Oct-26 17:00 ATCO, ALTALINK RB 12L41 (510s Sunnybrook - 939s Livock) ATCO - installing replacement corona rings on 12L44 due to failure, replacement warranty 177 Hours
Daily		  
09-Oct-26 09:00 30-Oct-26 16:00 BCH RB 2L294 (BCH A. A. Lambert - BCH Cranbrook), 2L294 (BCH A. A. Lambert - BCH Nelway) tree removal 511 Hours
Continuous		 AB-BC
10-Oct-26 07:00 19-Oct-26 17:00 EPCOR Outage T4 (Poundmaker), 72PM25 (Poundmaker - Meadowlark), M726 (Meadowlark), PM721 (Poundmaker) Meadowlark TX1 civil works 226 Hours
Continuous		  
11-Oct-26 08:00 23-Nov-26 16:00 ENMAX Outage 32.1TR (SS-32) oil containment replacement 1,041 Hours
Continuous		  
12-Oct-26 07:00 15-Oct-26 17:00 ALTALINK RB 7L230 (69s North Barrhead - 888AL tap) ATCO climbing inspection 82 Hours
Daily		  
12-Oct-26 07:00 05-Nov-26 18:00 ALTALINK TE 304s RTU/SCADA (304s Shell Limestone) RTU configuration update 588 Hours
Daily		  
12-Oct-26 08:00 16-Oct-26 16:00 ENMAX Outage 24.81L (SS-24 - SS-31), 31B138-24.81 (SS-31) installation of new surge arrestors 104 Hours
Continuous		  
12-Oct-26 08:00 15-Oct-26 17:00 ATCO, ALTALINK RB 7L230 (743s Sarah Lake - 888AL tap) walk up and climbing inspection on 7L230 81 Hours
Continuous		  
12-Oct-26 08:00 30-Oct-26 16:00 ENMAX Outage 32.83L (SS-32 - SS-40), 26.81L (SS-26 - SS-32), 32.1TR (SS-32), 26B138-26.81 (SS-26), 32B138-26.81 (SS-32), 32B138-32.83 (SS-32), 40B138-32.83 (SS-40) 32.1TR oil containment replacement 440 Hours
Continuous		  
12-Oct-26 10:00 15-Oct-26 16:00 ATCO Outage 888s 906 (888s Dover) 21A/9L74 relay replacement. Cutover breaker and CT to new protection 78 Hours
Continuous		  
12-Oct-26 11:00 30-Oct-26 19:00 ATCO TE 888s Protection & Control (888s Dover) block 21A/9L74 for a new protection relay 440 Hours
Continuous		  
13-Oct-26 06:00 16-Oct-26 17:00 ALTALINK RB 610L (83s Taber - 336s Fincastle) install temporary understrung line and stringing wire 83 Hours
Daily		  
13-Oct-26 07:00 24-Oct-26 17:00 EPCOR Outage CV5 (EP 511s Victoria - 557s Castle Downs), EP 511s Victoria T5 (EP 511s Victoria), 557s CD2405 (557s Castle Downs), 557s CD2406 (557s Castle Downs), EP 511s V2401 (EP 511s Victoria), EP 511s V727 (EP 511s Victoria), EP 511s V728 (EP 511s Victoria), EP 511s VDS25 (EP 511s Victoria) manhole inspections and maintenance and 72kV breaker fail protection upgrade cutovers and commissioning 106 Hours
Continuous		  
13-Oct-26 07:00 17-Oct-26 17:00 ATCO, ALTALINK Outage 962L (87s Gaetz - 972s Tinchebray), 986L (87s Gaetz - 972s Tinchebray), 972s 9L62D1 (972s Tinchebray), 972s 9L86D1 (972s Tinchebray) interphase spacer work using HEC with a helicopter 106 Hours
Continuous		  
13-Oct-26 07:00 17-Oct-26 17:00 ATCO, ALTALINK IO 9L62 (87s Gaetz - 972s Tinchebray), 9L86 (87s Gaetz - 972s Tinchebray) AltaLink request 106 Hours
Continuous		  
13-Oct-26 08:00 19-Oct-26 16:00 ATCO RB 7L12 (834s Wesley Creek - 7LA12 tap), 7L12 (780s Lubicon - 7LA12 tap) installing openers J1 and J2 152 Hours
Continuous		  
13-Oct-26 08:00 30-Oct-26 16:00 ALTALINK TE 163s Protection & Control (163s Amoco Empress) circuit cutovers 416 Hours
Daily		  
13-Oct-26 08:00 15-Oct-26 17:30 ALTALINK RB 775L (276s Prentiss - 535s Joffre) reclose blocks for 962L/986L work 57.5 Hours
Daily		  
13-Oct-26 08:00 15-Oct-26 17:30 ALTALINK RB 759L (87s Gaetz - 276s Prentiss) reclose block for 962L/986L Repairs 57.5 Hours
Daily		  
13-Oct-26 08:00 15-Oct-26 17:30 ALTALINK RB 793L (87s Gaetz - 535s Joffre) reclose blocks for 962L/986L work 57.5 Hours
Daily		  
13-Oct-26 08:00 15-Oct-26 17:30 ALTALINK RB 784AL (482s Haynes - 784L tap), 784L (332s Ellis - 784AL tap), 784L (535s Joffre - 784AL tap) reclose Block for 962L/986L work 57.5 Hours
Daily		  
13-Oct-26 08:00 16-Oct-26 16:00 ALTALINK, TRANSALTAGP TE WAP1s RTU/SCADA (WAP1s Westlock Algonquin Power) replace RTU with a new SMP SG-4260 RTU/HMI 80 Hours
Daily		  
13-Oct-26 08:00 19-Oct-26 17:00 ATCO TE 888s Protection & Control (888s Dover) tie in signals between 21A/9L09 and the new 21A/9L74, adjust 905 trip circuit on 21B/9L09 153 Hours
Continuous		  
13-Oct-26 08:00 15-Oct-26 16:00 ENMAX, ALTALINK RB 1065L (74s Janet - 102s Langdon) fibre splicing in the FOSC at 1065L A frame in 102s Langdon 56 Hours
Daily		  
13-Oct-26 08:00 16-Oct-26 16:00 ALTALINK TE 574s Protection & Control (574s Nilrem) protection firmware update 80 Hours
Daily		  
13-Oct-26 08:00 16-Oct-26 16:00 ALTALINK TE 574s Protection & Control (574s Nilrem) protection firmware update 80 Hours
Daily		  
13-Oct-26 08:00 16-Oct-26 16:00 ALTALINK TE 377s Protection & Control (377s AML Hardisty) protection firmware update 80 Hours
Daily		  
13-Oct-26 08:30 15-Oct-26 17:00 ALTALINK RB 756L (87s Gaetz - 535s Joffre) reclose blocks for 962L/986L work 56.5 Hours
Daily		  
13-Oct-26 09:00 30-Oct-26 16:00 ATCO Outage 7L90 (813s Little Smoky - 7LA90 tap) 7L90 pole replacement 415 Hours
Continuous		  
13-Oct-26 09:00 18-Dec-26 18:00 ALTALINK Outage 799L (235s Entwistle - 443s South Mayerthorpe), 235s 799N (235s Entwistle) rebuild structure and restring OPGW 1,594 Hours
Continuous		  
13-Oct-26 09:00 16-Oct-26 16:00 ATCO TE ATCO Telecom Equipment new and modified services
79 Hours
Continuous		  
13-Oct-26 09:00 16-Oct-26 17:00 BCH, BPA Outage 5L52 (BPA Custer - BCH Ingledow) glass replacement 80 Hours
Continuous		 AB-BC
13-Oct-26 09:00 15-Oct-26 17:00 ALTALINK Outage 431s 295 (431s Hussar), 431s T2 (431s Hussar) new bird cover 56 Hours
Continuous		  
13-Oct-26 10:00 15-Oct-26 16:00 ATCO TE 951s RTU/SCADA (951s Thickwood Hills) computer patching 54 Hours
Continuous		  
13-Oct-26 10:00 16-Oct-26 16:00 ATCO Outage 951s SVC (951s Thickwood), 951s 919 (951s Thickwood Hills), 951s 919A (951s Thickwood Hills), 951S 902 (951s Thickwood Hills), 951s 903 (951s Thickwood Hills) annual maintenance/inspection, config changes, 919A B Phase requires adjustment 102 Hours
Continuous		  
13-Oct-26 11:00 15-Oct-26 16:00 ALTALINK TE 149s Protection & Control (149s Nisku) fault recording implementation
53 Hours
Daily		  
13-Oct-26 11:00 15-Oct-26 16:00 ALTALINK TE 149s RTU/SCADA (149s Nisku) firmware upgrade and configuration changes on the RTU for fault reporting implementation 53 Hours
Continuous		  
13-Oct-26 11:00 16-Oct-26 17:00 ATCO RB 6L56 (763s Hanna - 802s Michichi Creek) climbing inspection on 6L56 78 Hours
Continuous		  
13-Oct-26 11:00 16-Oct-26 16:00 ALTALINK TE 478s Protection & Control (478s Tucuman) protection firmware update 77 Hours
Daily		  
13-Oct-26 12:30 15-Oct-26 17:00 ALTALINK Outage 89s Ellerslie 240kV Bus 1, 89s T1 (89s Ellerslie), 89s 952 (89s Ellerslie), 89s 652 (89s Ellerslie), 89s 1352 (89s Ellerslie), 89s 252 (89s Ellerslie), 89s 1789 (89s Ellerslie) low gas top up 52.5 Hours
Continuous		  
13-Oct-26 12:30 15-Oct-26 17:00 ALTALINK, EPCOR RB 908L (89s Ellerslie - 816s Petrolia) Altalink working on 89s 240kV West Bus 52.5 Hours
Continuous		  
13-Oct-26 13:30 15-Oct-26 17:00 ALTALINK Outage 157s 138kV Bus 1 (157s Lac La Biche), 728L (157s Lac La Biche - 353s Plamondon), 788L (157s Lac La Biche - 788AL tap), 157s T1 (157s Lac La Biche), 157s C1 (157s Lac La Biche), 157s 728W (157s Lac La Biche), 157s 652 (157s Lac La Biche), 353s 552 (353s Plamondon), 157s 788N (157s Lac La Biche), 157s 3 (157s Lac La Biche) urgent switch repair/hot spot repairs, breaker maintenance

51.5 Hours
Continuous		  
13-Oct-26 14:00 19-Oct-26 16:00 ATCO Outage 7L12 (780s Lubicon - 7LA12 tap) 7L12D3 repair 146 Hours
Continuous		  
14-Oct-26 06:00 15-Oct-26 17:00 ATCO TE ATCO RTU/SCADA SOC2 backup control centre activation 35 Hours
Continuous		  
14-Oct-26 07:00 18-Oct-26 17:00 EPCOR Outage EP 511s Victoria T3 (EP 511s Victoria), EP 511s V724 (EP 511s Victoria), EP 511s V725 (EP 511s Victoria), EP 511s VAB3 (EP 511s Victoria) civil work 82 Hours
Continuous		  
14-Oct-26 07:30 15-Oct-26 17:00 ALTALINK Outage 74s T2 (74s Janet), 74s 77 (74s Janet) alarming issue 33.5 Hours
Continuous		  
14-Oct-26 08:00 15-Oct-26 17:30 ALTALINK RB 730L (197s Bardo - 732L tap), 730L (285s East Camrose - 732L tap), 732L (299s Kingman - 732AL tap), 732AL (301s Queensland - 732L tap), 732L (732L tap - 732AL tap) replace arms and insulation 33.5 Hours
Daily		  
14-Oct-26 08:00 15-Oct-26 16:00 ALTALINK TE 296s RTU/SCADA (296s Rosyth) RTU configuration update. 32 Hours
Daily		  
14-Oct-26 08:00 15-Oct-26 16:00 ALTALINK TE 504s Protection & Control (504s Queenstown) maintenance 32 Hours
Daily		  
14-Oct-26 08:00 15-Oct-26 16:00 SUNCOR TE 635EDD-1000 RTU/SCADA (635EDD-1000), 635EDD-1001 RTU/SCADA (635EDD-1001), 635EDD-1002 RTU/SCADA (635EDD-1002), 635EDD-1003 RTU/SCADA (635EDD-1003) update config 32 Hours
Continuous		  
14-Oct-26 09:00 16-Oct-26 17:00 ATCO TE ATCO Telecom Equipment DJF removal 8 Hours
Continuous		  
14-Oct-26 12:15 15-Oct-26 16:00 ATCO, AIRLIQUIDE, SHELL Outage ALC03L (402s Scotford Expansion One - 408s Air Liquide Scotford), 402s 352 (402s Scotford Expansion One), 402s 452 (402s Scotford Expansion One) Insulator cleaning and deficiency repair on ALC03L. Avian mitigation bird perch deterrents 28 Hours
Continuous		  
14-Oct-26 12:15 15-Oct-26 16:00 ATCO, ALTALINK, SHELL TE 402s Protection & Control (402s Scotford Expansion 1) replacing failed contacts 27.75 Hours
Continuous		  
14-Oct-26 12:15 15-Oct-26 16:00 ATCO, SHELL RB EX1-01L (402s Scotford Expansion One - 879s Upgrader) insulator cleaning on ALC03L 27.75 Hours
Continuous		  
14-Oct-26 19:00 15-Oct-26 05:00 ENMAX RB 20.82L (SS-20 - SS-21) construction 1.81L river crossing 10 Hours
Continuous		  
15-Oct-26 06:00 21-Oct-26 18:00 SUNCOR Outage 635EDD-1000 635-752-153 (635EDD-1000), 635EDD-1000 635-752-152 (635EDD-1000), 635PL7-1002 (635EDD-1000 - 635EDD-1004) Fort Hills: MP09 - Planned maintenance of 144kV and 72kV equipment. 156 Hours
Continuous		  
15-Oct-26 07:00 15-Oct-26 09:00 CMH TE Medicine Hat ICCP Outage upgrading our firewall to new model,CMH's ICCP link to go down as the physical ICCP link will need to be moved from the old firewall device. still have visibility & control it's equipment during this time. 2 Hours
Continuous		  
15-Oct-26 07:15 15-Oct-26 18:00 ALTALINK Outage 781L (71s Lamoureux - 172s Sherritt), 172s 781W (172s Sherritt), 71s 781E (71s Lamoureux) urgent Repair, transmission line repairs 10.75 Hours
Daily		  
15-Oct-26 07:30 15-Oct-26 17:30 ALTALINK, DOW RB 787L (166s Dow Chemical Fort Saskatchewan - 787AL tap), 787L (71s Lamoureux - 787AL tap) safety requirement for 781L GOI 10 Hours
Daily		  
15-Oct-26 07:30 17-Oct-26 17:00 ATCO, ALTALINK RB 912L (63s Red Deer - 766s Nevis) for 962L/986L working between str. 165,166 57.5 Hours
Daily		  
15-Oct-26 07:30 17-Oct-26 17:00 ATCO, ALTALINK IO 9L912 (63s Red Deer - 766s Nevis) reclosing blocked for AltaLink work 57.5 Hours
Continuous		  
15-Oct-26 08:00 15-Oct-26 18:00 ALTALINK Outage 763L (28s West Brooks - 763AL tap), 763AL (447s Enchant - 763A1L tap), 763L (158s Vauxhall - 763AL tap), 158s 763N (158s Vauxhall), 28s 47 (28s West Brooks), 28s 31 (28s West Brooks), 447s 763A (447s Enchant), 447s 16 (447s Enchant), 763L259 (763AL tap), 763L257A (763AL tap), 28s 763X (28s West Brooks) 447s27 replace line VT 10 Hours
Continuous		  
15-Oct-26 08:00 15-Oct-26 17:00 ALTALINK, TRANSALTAGP TE WAP1s RTU/SCADA (WAP1s Westlock Algonquin Power), WAP1 Protection & Control (WAP1 Westlock Algonquin Power) SCADA VLAN, firmware, telecom firewall upgrade, LAN switch upgrade, MPLS node upgrades, RAW socket conversion 9 Hours
Daily		  
15-Oct-26 08:00 15-Oct-26 12:00 ENMAX Outage 39.3TR (SS-39) oil sampling outage required - 39.3-TC 4 Hours
Continuous		  
15-Oct-26 08:00 30-Oct-26 16:00 ENMAX Outage 5.7TR (SS-5) 25kV Bus. pull in 25kV feeder cables. ground 25kV Bus 368 Hours
Continuous		  
15-Oct-26 08:00 15-Oct-26 16:00 ALTALINK TE 71s Protection & Control (71s Lamoureux) standard relay maintenance 8 Hours
Daily		  
15-Oct-26 09:00 15-Oct-26 16:00 ATCO TE 721s RTU/SCADA (721s La Corey), ATCO Telecom Equipment LaCorey_s-telecom- 7750-2 Integration. swapping site networking to VPLS 11, 721s Scada outage during switch update will lose visibility for up to 2 hours. 7 Hours
Continuous		  
15-Oct-26 12:00 16-Oct-26 17:00 ATCO TE ATCO Telecom Equipment, 721s La Corey lacorey_s-telecom-MPLS life cycle upgrades to SAR A. prep on Oct 15, cut over Oct 16 between 10am-2pm.7L89 thermal protection - 7L89 702 breaker fail 29 Hours
Continuous		  
15-Oct-26 12:00 15-Oct-26 16:00 ENMAX Outage 39.4TR (SS-39) oil sampling outage required - 39.4-TC. reversing switch check 4 Hours
Continuous		  
15-Oct-26 13:00 15-Oct-26 18:00 TRANSALTA, ALTALINK, Lethbridge Outage 240s McBride Lake, 725BL (240s McBride Lake - 725L tap), 725L (15s Fort MacLeod - 725BL tap), 725L (674s Bowron - 725BL tap), 15s 725 (15s Fort Macleod) advice to city of Lethbridge to close their open point. 3.83 Hours
Continuous		  
15-Oct-26 14:00 15-Oct-26 17:00 Lethbridge, ALTALINK Outage 674s 1 (674s Bowron), 725L (674s Bowron - 725BL tap) 725L line Outage required on 725LW to close open point “A” at structure #1 to 674s1 at 674s substation 3 Hours
Continuous		  
15-Oct-26 19:00 16-Oct-26 05:00 ENMAX RB 20.82L (SS-20 - SS-21) construction 1.81L river crossing 10 Hours
Continuous		  
16-Oct-26 07:00 22-Oct-26 17:00 ALTALINK RB 7L230 (69s North Barrhead - 888AL tap) ATCO climbing inspection 154 Hours
Daily		  
16-Oct-26 07:00 16-Oct-26 17:00 EPCOR TE 665s RTU/SCADA (665s Dome) Dome: RTU outage 10 Hours
Continuous		  
16-Oct-26 08:00 22-Oct-26 17:00 ATCO, ALTALINK RB 7L230 (743s Sarah Lake - 888AL tap) walkup and climbing inspection on 7L230 153 Hours
Continuous		  
16-Oct-26 08:00 16-Oct-26 17:00 ALTALINK TE 69s RTU/SCADA (69s North Barrhead), AltaLink Telecom Equipment MPLS node upgrades 9 Hours
Daily		  
16-Oct-26 08:00 05-Nov-26 17:00 ATCO, ALTALINK RB 12L41 (510s Sunnybrook - 939s Livock) installing replacement corona rings on 12L41 due to failure 490 Hours
Continuous		  
16-Oct-26 08:00 16-Oct-26 16:00 ALTALINK TE 252s RTU/SCADA (252s Jarrow), AltaLink Telecom Equipment telecom upgrade 8 Hours
Daily		  
16-Oct-26 08:00 05-Nov-26 17:00 ATCO, ALTALINK RB 12L41 (510s Sunnybrook - 939s Livock) installing replacement corona rings on 12L41 due to failure 490 Hours
Daily		  
16-Oct-26 08:00 16-Oct-26 12:00 ENMAX Outage 11.1TR (SS-11) oil sampling outage required  4 Hours
Continuous		  
16-Oct-26 09:00 16-Oct-26 16:00 ATCO TE 720s RTU/SCADA (720s Wabasca), ATCO Telecom Equipment 7750-2 integration, swapping site networking to VPLS 11 7 Hours
Continuous		  
16-Oct-26 10:00 19-Oct-26 16:00 ATCO Outage 888s 905 (888s Dover) 21A/9L74 relay replacement, cutover breaker and CT to new protection 78 Hours
Continuous		  
16-Oct-26 19:00 17-Oct-26 05:00 ENMAX RB 20.82L (SS-20 - SS-21) construction 1.81L river crossing, crew working in close proximity to 20.82L 10 Hours
Continuous		  
17-Oct-26 07:00 09-Nov-26 14:00 ALTALINK Outage 215L (38s East Edmonton - 215AL tap), 731L (38s East Edmonton - 746L tap), 761L (38s East Edmonton - 71s Lamoureux), 38s T7 (38s East Edmonton), 38s T8 (38s East Edmonton), 38s T3 (38s East Edmonton), 38s 761N (38s East Edmonton), 38s 731E (38s East Edmonton), 38s 4152 (38s East Edmonton), 38s 4252 (38s East Edmonton), 38s 215N (38s East Edmonton) tie in 38s332 & 38s333 to 38s 138kV bus 2, BF trips to breakers, confirm 38s Open Point G & H open 560 Hours
Continuous		  
17-Oct-26 07:30 19-Oct-26 15:00 ATCO Outage 6L56 (763s Hanna - 802s Michichi Creek), 763s 601 (763s Hanna), 802s 606 (802s Michichi Creek) structure replacement and deficiency repair, aerial marker cone installation at str spans 47, 48 55.5 Hours
Continuous		  
17-Oct-26 08:00 17-Oct-26 16:00 ENMAX Outage 162B138-RB82 (SS-162) breaker maintenance, SF6 gas sample 8 Hours
Continuous		  
17-Oct-26 08:00 23-Oct-26 16:00 ALTALINK TE 38s RTU/SCADA (38s East Edmonton) updating the RTU/HMI config to add new T7 and T8 alarms 152 Hours
Daily		  
17-Oct-26 08:30 18-Oct-26 17:30 ALTALINK RB 793L (87s Gaetz - 535s Joffre) replace marker ball 33 Hours
Daily		  
17-Oct-26 08:30 18-Oct-26 17:30 ALTALINK RB 759L (87s Gaetz - 276s Prentiss) crews working within close proximity on 793L 33 Hours
Daily		  
17-Oct-26 08:30 18-Oct-26 17:30 ALTALINK RB 756L (87s Gaetz - 535s Joffre) crews working within close proximity on 793L 33 Hours
Daily		  
17-Oct-26 09:00 18-Oct-26 17:00 ATCO TE 888s Protection & Control (888s Dover) tie in signals from new 21A/9L74 relay to 916R A protection 32 Hours
Continuous		  
17-Oct-26 19:00 18-Oct-26 05:00 ENMAX RB 20.82L (SS-20 - SS-21) construction 1.81L river crossing, crew working in close proximity to 20.82L 10 Hours
Continuous		  
18-Oct-26 07:00 18-Oct-26 17:00 ALTALINK Outage 831L (339s Duchess - 831AL tap), 831L (121s Brooks - 831AL tap), 831AL (227s Cutting Lake - 831L tap), 121s 831N (121s Brooks), 339s 831 (339s Duchess), 227s 831AW (227s Cutting Lake) install bird flight diverters 10 Hours
Continuous		  
18-Oct-26 07:00 19-Oct-26 17:00 ATCO, ALTALINK RB 1035L (244s Bowmanton - 2075s Newell) installing marker cones 34 Hours
Daily		  
18-Oct-26 08:00 18-Oct-26 16:00 ENMAX Outage 162B138-RB80 (SS-162) breaker SF6 gas sample, breaker trip circuit test 8 Hours
Continuous		  
18-Oct-26 16:00 09-Nov-26 14:00 ALTALINK IO 38s T8 (38s East Edmonton), 38s 4852 (38s East Edmonton) T8 install, close 38s open point G 527 Hours
Continuous		  
19-Oct-26 06:00 23-Oct-26 12:00 ALTALINK, NOVAC Outage 330L4 (196s Nova Chemicals - 330L2 tap), 196s T2 (196s Nova Chemicals), 196s R3-BR-B (196s Nova Chemicals) electrical equipment maintenance 102 Hours
Continuous		  
19-Oct-26 06:00 23-Oct-26 19:00 ALTALINK RB 610L (83s Taber - 336s Fincastle) install temporary understrung line, stringing wire 109 Hours
Daily		  
19-Oct-26 07:00 21-Oct-26 11:30 EPCOR Outage EP 511s V728 (EP 511s Victoria) breaker fail upgrade cutovers and commissioning 52.5 Hours
Continuous		  
19-Oct-26 07:00 25-Oct-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) Hardisty: TX1 Zone, HAB1 Repair 154 Hours
Continuous		  
19-Oct-26 07:00 19-Oct-26 17:00 ALTALINK Outage 478s 152 (478s Tucuman), 51s 704 (51s Wainwright), 704L (51s Wainwright - 478s Tucuman) 704L Line Maintenance 10 Hours
Continuous		  
19-Oct-26 07:00 23-Oct-26 17:00 EPCOR Outage T2 (EP Riverview) Riverview - TX2 emergency conservator repair 96.02 Hours
Continuous		  
19-Oct-26 07:00 20-Oct-26 08:00 ALTALINK Outage 15s 180N (15s Fort Macleod), 180L (15s Fort Macleod - 180AL tap) Customer maintenance to disconnect and CVT. 25 Hours
Continuous		  
19-Oct-26 07:30 23-Oct-26 17:00 ALTALINK Outage AML 511s 1152 (AML 511s Crossings), AML 511s T30 (AML 511s Crossings) Annual standard maintenance 105.5 Hours
Continuous		  
19-Oct-26 08:00 22-Oct-26 16:00 ATCO Outage 751s 702T (751s Hill) transformer and breaker maintenance 80 Hours
Continuous		  
19-Oct-26 08:00 23-Oct-26 16:00 ALTALINK TE 163s RTU/SCADA (163s Amoco Empress) Supervisory outages required for SCADA configuration updates involving new 11/1252 protection. Brief loss of visibility while downloading new configs Restored each night. 104 Hours
Daily		  
19-Oct-26 08:00 22-Oct-26 16:00 ALTALINK TE AltaLink Telecom Equipment, 214s RTU/SCADA (214s Innisfail) Firewall Upgrade, MPLS 7705 Nodes firmware upgrade, RAW socket conversion. Loss of 214s visibility for 2 hours.
Some TPR will be OOS while redundant TPR will remain in service & other TPR channels will be rerouted in 50ms.
AIS 1156 between 55S - 214S will be out of service for 1 hour.		 80 Hours
Daily		  
19-Oct-26 08:00 23-Oct-26 16:00 ALTALINK TE 63s RTU/SCADA (63s Red Deer) update the RTU to increase the ACC database size to accommodate new points 104 Hours
Daily		  
19-Oct-26 08:00 22-Oct-26 16:00 ALTALINK TE 312s Protection & Control (312s Fidler) protection outages to implement and testing fault reporting settings changes 80 Hours
Daily		  
19-Oct-26 08:00 23-Oct-26 16:00 ENMAX Outage 9.80L (SS-9 - SS-31), 31B138-9.80 (SS-31), 9B138-9.80 (SS-9) installation of new surge arrestors 104 Hours
Continuous		  
19-Oct-26 08:00 19-Oct-26 16:00 ALTALINK TE 392s Protection & Control (392s Black Diamond) Standard Maintenance on Redundant protections for T2 A87A, B, C and T2 S50/51A, B, C, N, One relay at a time.
Perform Meter Reseals on lines 240L, 219L, 2154L and 121L.		 8 Hours
Continuous		  
19-Oct-26 08:00 20-Oct-26 16:00 ALTALINK TE 345s Protection & Control (345s Hornbeck) Through Fault settings changes on T1A protection and maintenance on 1150L A & B protection. Redundant prot will remain in service at all times

32 Hours
Daily		  
19-Oct-26 08:00 20-Oct-26 16:00 ALTALINK TE 39s Protection & Control (39s Bickerdike) Maintenance on 1150L A & B, 973L A & B and 974L A & B protections. 1150L A & B testing coordinated at both 345s & 39s. Redundant protections always in service. 32 Hours
Daily		  
19-Oct-26 08:00 21-Oct-26 15:00 ALTALINK Outage 535s 97N (535s Joffre) perform maintenance and to assist them to test the Fiber Optic of L8 55 Hours
Continuous		  
19-Oct-26 08:00 22-Oct-26 16:00 ALTALINK TE 89s Protection & Control (89s Ellerslie) PRC Maintenance on 752, 952, 1052, 1152, 1252, 1552, 1952, 2252, BF protections - Non redundant
and on Redundant protections 947L A&B, 240B1 A&B, 240B2 A, 500B1 A&B, 500B2 A&B and T1 500G3 A&B protections
80 Hours
Daily		  
19-Oct-26 08:00 19-Oct-26 11:00 ENMAX Outage 47.2TR (SS-47) reversing switch check, oil sampling and maintenance 3 Hours
Continuous		  
19-Oct-26 08:00 19-Oct-26 16:00 ENMAX RB 11.82L (SS-11 - SS-14) fall tree trimming 8 Hours
Continuous		  
19-Oct-26 08:00 19-Oct-26 16:00 ENMAX Outage 162B138-RB85 (SS-162) 162sub C60-8 protection outage. Settings correction to C60-8 relay at 162 sub 8 Hours
Continuous		  
19-Oct-26 08:00 23-Oct-26 16:00 ALTALINK TE 281s RTU/SCADA (281s Johnson) RTU outage required to update new device passwords in RTU. Loss of 281s visibility for 15 minutes in the timeframe indicated 104 Hours
Daily		  
19-Oct-26 08:00 30-Oct-26 16:00 ALTALINK TE 356s RTU/SCADA (356s Milo) RTU updates required for addition of security alarms for high security fence installation. Actual date of RTU outage still not determined. Depends on progress of Securitas security contractors this week. Several short RTU visibility outages 10 minutes as a time during reboots, restored at night. 272 Hours
Daily		  
19-Oct-26 08:00 30-Oct-26 16:00 ALTALINK TE 214s Protection & Control (214s Innisfail), 287s Protection & Control (287s Hazelwood), 55s Protection & Control (55s Olds) Circuit cutovers and testing associated with mobile removal and testing of new L7, L8 and AIS protections. Settings changes to revert temp settings at 287s & 214s due to mobile removal. Redundant protection remains in service except breaker fail which will be OOS less than 6 hours. 272 Hours
Daily		  
19-Oct-26 08:30 25-Oct-26 17:30 ALTALINK RB 472AL (221s Sunken Lake - 472L tap), 472L (213s Hughenden - 472AL tap), 472L (648s Metiskow - 472AL tap) replace arm and insulation 153 Hours
Daily		  
19-Oct-26 09:00 23-Oct-26 17:30 ALTALINK RB 914L (86s Bigstone - 87s Gaetz) 914L proximity reclose blocks to complete 1083L maintenance
104.5 Hours
Daily		  
19-Oct-26 09:00 30-Oct-26 17:00 BCH, BPA Outage 5L51 (BPA Custer - BCH Ingledow) tower replacement BC maintenance does not affect the Alberta ATC 272 Hours
Continuous		 AB-BC
19-Oct-26 09:00 23-Oct-26 17:30 ALTALINK Outage 288s 152 (288s Wolf Creek), 288s 352 (288s Wolf Creek), 1083L (63s Red Deer - 288s Wolf Creek) 1083L Line maintenance, 288s1083 switch repair 104.5 Hours
Continuous		  
19-Oct-26 09:00 23-Oct-26 17:30 ALTALINK RB 914L (63s Red Deer - 87s Gaetz) 914L proximity reclose block for 1083L maintenance 104.5 Hours
Daily		  
19-Oct-26 09:00 23-Oct-26 16:00 ATCO TE ATCO Telecom Equipment existing link from 1888A Dover to 1848 Ruth lake will be removed 103 Hours
Continuous		  
19-Oct-26 09:30 19-Oct-26 15:30 ATCO RB 7L132 (767s Oyen - 959s Lanfine) tap down 2000S mobile to 7L132 6 Hours
Continuous		  
19-Oct-26 09:30 19-Oct-26 15:30 ATCO Outage 767s 602T (767s Oyen) GOI to tap down 2000S mobile from 767s 25 kv bus 6 Hours
Continuous		  
19-Oct-26 10:00 19-Oct-26 17:30 ALTALINK Outage 102s 552 (102s Langdon) low gas on associated CT 5.5 Hours
Continuous		  
19-Oct-26 10:45 19-Oct-26 11:00 BCH Outage 5L96 (BCH Selkirk - BCH Vaseux Lake), 5RX2 (BCH Selkirk) 5RX2 auto isolation testing 0.25 Hours
Continuous		 AB-BC
19-Oct-26 11:00 23-Oct-26 11:00 ALTALINK Outage 163s 1552 (163s Amoco Empress) breaker failure and control protection upgrade 96 Hours
Continuous		  
19-Oct-26 11:00 23-Oct-26 17:30 ICPCL, ALTALINK Outage 313s Raymond Reservoir, 225L (225s Magrath - 225AL tap), 225L (67s Stirling - 225AL tap), 225AL (313s Raymond Reservoir - 225L tap), 225s 225E (225s Magrath), 67s 225 (67s Stirling), 313s 52M (313s Raymond Reservoir), 313s 52B (313s Raymond Reservoir), 313s 52G (313s Raymond Reservoir) line maintenance
102.5 Hours
Continuous		  
19-Oct-26 11:00 30-Oct-26 19:00 ATCO TE 960s Protection & Control (960s Birchwood Creek) block 21A/9L74 to update settings for Armistead 272 Hours
Continuous		  
19-Oct-26 11:00 22-Oct-26 16:00 ALTALINK TE 312s RTU/SCADA (312s Fidler) RTU outage for techs to implement fault reporting 77 Hours
Continuous		  
19-Oct-26 11:05 19-Oct-26 16:00 ATCO, ALTALINK Outage 743s 144kV Bus 700BS2 (743s Sarah Lake), 7L230 (743s Sarah Lake - 888AL tap), 7L67 (743s Sarah Lake - 824s Fieldgate), 743s 702 (743s Sarah Lake), 743s 703 (743s Sarah Lake), 743s 702T (743s Sarah Lake) remove jumper J2 - reconnect low bus to high bus 4.92 Hours
Continuous		  
19-Oct-26 12:00 21-Oct-26 17:00 ALTALINK Outage 953s T1 (953s Lake Louise), 953s 47 (953s Lake Louise), 953s 48 (953s Lake Louise) 953sT1 major maintenance 53 Hours
Continuous		  
19-Oct-26 13:00 20-Oct-26 17:00 ALTALINK Outage 62s T2 (62s Brazeau Plant), 62s 2 (62s Brazeau Plant) breaker maintenance 28 Hours
Daily		  
19-Oct-26 16:01 04-Nov-26 16:00 ATCO Outage 7L12 (834s Wesley Creek - 7LA12 tap), 834s 710 (834s Wesley Creek), 834s 704 (834s Wesley Creek) changing the entire structure plus the switch 7L12D2 384.98 Hours
Continuous		  
20-Oct-26 07:00 20-Oct-26 17:00 ALTALINK Outage 61s 202X (61s Lodgepole), 62s 202 (62s Brazeau Plant), 202L (61s Lodgepole - 62s Brazeau Plant) Install temporary grounds and lift line for high load move crossing between 202L Str 143 &144. 10 Hours
Continuous		  
20-Oct-26 07:00 23-Oct-26 17:00 EPCOR Outage 72JM18 (EP 805s Jasper - Meadowlark), T1 (Meadowlark), EP 805s J722 (EP 805s Jasper), M721 (Meadowlark), M722 (Meadowlark), MAB1 (Meadowlark), EP 805s JDS29 (EP 805s Jasper) tx1 civil work 82 Hours
Continuous		  
20-Oct-26 08:00 25-Oct-26 20:00 SUNCOR Outage 29PL6-22 (29EDD-1 Millennium - 29EDD-2 Tar Island), 29EDD-2 29PT-3 (29EDD-2 Tar Island), 29EDD-2 252-5205 (29EDD-2 Tar Island), 29EDD-2 352-0201 (29EDD-2 Tar Island) settings change 156 Hours
Continuous		  
20-Oct-26 08:00 21-Oct-26 16:00 Syncrude Outage T11 (Aurora), 14 (Aurora), 24 (Aurora), 34 (Aurora), 213 (Aurora), 223 (Aurora) replace seal in relay on T11 32 Hours
Continuous		  
20-Oct-26 08:00 20-Oct-26 16:00 ALTALINK TE 237s Protection & Control (237s Foothills) PRC maintenance on redundant protections. 8 Hours
Continuous		  
20-Oct-26 08:00 21-Oct-26 17:00 ALTALINK TE AltaLink Telecom Equipment hardware upgrade 33 Hours
Continuous		  
20-Oct-26 08:00 21-Oct-26 16:00 ALTALINK TE 535s Protection & Control (535s Joffre) testing of fiber optic cables 32 Hours
Daily		  
20-Oct-26 08:00 21-Oct-26 16:00 ALTALINK TE 535s RTU/SCADA (535s Joffre) testing of fiber optic cables, one fiber feeds into the RTU. supervisory outage required so we can flip the supervisory switch and cut off controls as a precaution. 32 Hours
Daily		  
20-Oct-26 08:00 22-Oct-26 17:00 ATCO RB 7L53 (700s Bonnyville - 7LA53 tap), 7L53 (706s Irish Creek - 7LA53 tap) live line pole replacement on 7LA53 57 Hours
Continuous		  
20-Oct-26 08:00 20-Oct-26 16:00 ENMAX RB 11.82L (SS-11 - SS-14) Fall tree trimming 8 Hours
Continuous		  
20-Oct-26 08:00 21-Oct-26 16:00 ENMAX Outage 3.4TR (SS-3) replace feeder relay 32 Hours
Continuous		  
20-Oct-26 08:30 20-Oct-26 16:30 ALTALINK Outage 74s C2 (74s Janet), 74s C1 (74s Janet) maintenance 8 Hours
Continuous		  
20-Oct-26 09:00 20-Oct-26 15:00 ALTALINK Outage 228s 31 (228s T.M.P.L. Niton), 228s T1 (228s T.M.P.L. Niton) Add new grounds on T1 LA's 6 Hours
Continuous		  
20-Oct-26 09:00 20-Oct-26 16:00 ATCO TE ATCO Telecom Equipment, 735s RTU/SCADA (735s Swan River) Swan River_T-Telecom 7 Hours
Continuous		  
20-Oct-26 09:00 22-Oct-26 20:00 SUNCOR TE 29EDD-34 RTU/SCADA (29EDD-34) 29EDD-34 - test low voltage 225A breakers, isolations affecting chargers DFR, HVAC, lighting, breaker heaters and firewall 59 Hours
Continuous		  
20-Oct-26 09:00 20-Oct-26 13:00 ALTALINK TE AltaLink Telecom Equipment outage on the fiber link 4 Hours
Daily		  
20-Oct-26 09:30 21-Oct-26 16:00 ATCO TE ATCO Telecom Equipment telecom work 30.5 Hours
Continuous		  
20-Oct-26 12:30 25-Oct-26 16:00 ENMAX Outage 20.82L (SS-20 - SS-21) construction 20.82L 123.5 Hours
Continuous		  
20-Oct-26 19:00 21-Oct-26 05:00 ENMAX RB 1.81L (SS-1 - SS-20) construction 20.82L river crossing. crew working in close proximity to 20.82L 10 Hours
Continuous		  
21-Oct-26 07:00 21-Oct-26 17:00 ALTALINK Outage 185L (379s Shell Canada Waterton - 396s Pincher Creek), 379s 185N (379s Shell Canada Waterton), 396s 185 (396s Pincher Creek) install bird flight diverters on ahead spans of 185L Str 54, 97, 113 & 114, as part of 2026 bird marker program. 10 Hours
Continuous		  
21-Oct-26 07:00 21-Oct-26 17:00 EPCOR TE 52s RTU/SCADA (52s East Industrial) East Industrial: RTU extension cutover and commissioning, coordinate with Control Room 10 Hours
Continuous		  
21-Oct-26 07:00 23-Oct-26 17:00 EPCOR Outage 987s GT1 (987s Clover Bar), 987s CGB1 (987s Clover Bar) cloverbar: GT1, CPC rotor balancing and load tests 58 Hours
Continuous		  
21-Oct-26 08:00 05-Nov-26 16:00 Syncrude Outage T1 (Aurora), 260kV Bus 1 (Aurora), 211 (Aurora), 221 (Aurora), 72 kV Bus 1 (Aurora), 89-210 (Aurora), 21 (Aurora), 31 (Aurora), 11 (Aurora), 89-51 (Aurora) 6yr pm 345 Hours
Continuous		  
21-Oct-26 08:00 05-Nov-26 16:00 Syncrude Outage UT2 (Aurora), 22 (Aurora), 21 (Aurora), 89-25 (Aurora) zone 9 6yr pm 417 Hours
Continuous		  
21-Oct-26 08:00 23-Oct-26 16:00 BCH Outage T3 (BCH Natal) inspection/doble BC maintenance does not affect the Alberta ATC 56 Hours
Continuous		 AB-BC
21-Oct-26 08:00 21-Oct-26 17:00 ATCO TE ATCO Telecom Equipment Thornton_S – Telecom - bringing new fiber link to 845s Big mountain on line, site switch updates 8 Hours
Continuous		  
21-Oct-26 08:00 22-Oct-26 16:00 ALTALINK TE 255s Protection & Control (255s Vulcan) PRC maintenance on redundant protections 180L A&B, B87/138B1, 138B2 A&B and T2B, maint on non-redundant protections 152, 352 and 452 breaker fail protections 32 Hours
Daily		  
21-Oct-26 08:00 21-Oct-26 18:00 ALTALINK TE 55s RTU/SCADA (55s Olds), AltaLink Telecom Equipment radio OOS for 10 hrs. radio will be turned down, moved to new building. will be 1 hr BERT test done or longer if possible. MPLS nodes need to be configured for the radio, and Olds radio need to be reconfigured 10 Hours
Daily		  
21-Oct-26 08:00 21-Oct-26 16:00 ENMAX RB 11.82L (SS-11 - SS-14) fall tree trimming 8 Hours
Continuous		  
21-Oct-26 08:00 21-Oct-26 17:00 ATCO TE 853s RTU/SCADA (853s Ring Creek) firmware upgrade, 10 minutes 853s SCADA outage when the firewalls are upgraded. 9 Hours
Continuous		  
21-Oct-26 09:00 21-Oct-26 16:30 ALTALINK Outage 828L (178s Cynthia - 489s Petro-Canada Brazeau River), 178s 828X (178s Cynthia) test 178s828X CTs 7.5 Hours
Continuous		  
21-Oct-26 09:00 22-Oct-26 17:00 ATCO TE ATCO Telecom Equipment, 879s Scotford Upgrader RTU/SCADA, 850s RTU/SCADA (850s Rainbow Cogen), 798s RTU/SCADA (798s Bridge Creek) MPLS life cycle upgrades to SAR A.
prep on Oct 21, cut over oct 22 between 10am-2pm
, link to SOC2: 850s rainbow SW1, SW2, B&C; IPP, 879s Scotford upgrader, 798s Bridge Creek		 32 Hours
Continuous		  
21-Oct-26 09:00 21-Oct-26 15:00 ATCO Outage 7L39 (722s Crystal Lake - 7LA39 tap), 722s 701 (722s Crystal Lake) PRC-005 - trip coil testing - breaker 701 @ 722S

Breaker operation only. open-close-open-close		 6 Hours
Continuous		  
21-Oct-26 10:00 21-Oct-26 16:00 ATCO TE ATCO Telecom Equipment, 882s RTU/SCADA (882s Triangle) Triangle s-telecomm, swapping site networking 6 Hours
Continuous		  
21-Oct-26 12:00 23-Oct-26 17:00 EPCOR Outage EP 511s V729 (EP 511s Victoria) victoria: V729, breaker fail upgrade cutovers and commissioning 53 Hours
Continuous		  
21-Oct-26 12:00 30-Oct-26 11:00 ATCO Outage 850s 701T (850s Rainbow Cogen), 850s 433 (850s Rainbow Co-Gen) maintenance 215 Hours
Continuous		  
21-Oct-26 19:00 22-Oct-26 05:00 ENMAX RB 1.81L (SS-1 - SS-20) construction 20.82L river crossing. crew working in close proximity to 1.81L. 10 Hours
Continuous		  
22-Oct-26 08:00 29-Oct-26 09:00 ALTALINK Outage 443L (55s Olds - 214s Innisfail), 55s T2 (55s Olds), 214s 443 (214s Innisfail), 55s 443 (55S Olds) remove mobile 169 Hours
Continuous		  
22-Oct-26 08:00 22-Oct-26 16:00 ALTALINK TE 103s RTU/SCADA (103s Goose Lake) RTU outage to push SCN changes for 103s HMI RAS scheme clean up 8 Hours
Continuous		  
22-Oct-26 08:00 22-Oct-26 16:00 ENMAX RB 11.81L (SS-11 - SS-13) fall tree trimming 8 Hours
Continuous		  
22-Oct-26 08:00 22-Oct-26 20:00 ATCO TE ATCO Telecom Equipment upgrading dynamic load rating server for bug fixes

12 Hours
Continuous		  
22-Oct-26 09:00 22-Oct-26 17:00 ATCO Outage 834s 502R (834s Wesley Creek), 834s 501 (834s Wesley Creek), 834s 503 (834s Wesley Creek) investigate heater fail and install bird mitigation
8 Hours
Continuous		  
22-Oct-26 10:00 22-Oct-26 12:00 ATCO Outage 722s 703C (722s Crystal Lake) PRC-005 - trip coil testing - breaker 703 @ 722S 2 Hours
Continuous		  
22-Oct-26 13:00 22-Oct-26 15:00 ATCO Outage 7L84 (722s Crystal Lake - 749s Flyingshot Lake), 722s 702 (722s Crystal Lake) PRC-005 - trip coil testing - breaker 702 @ 722s

2 Hours
Continuous		  
22-Oct-26 13:00 31-Dec-27 17:00 ALTALINK, Keyera Cynthia Outage 359s T2 (359s Esso West Pembina), 359s 14 (359s Esso West Pembina) T2 maintenance 10,445 Hours
Continuous		  
22-Oct-26 19:00 24-Oct-26 05:00 ENMAX RB 1.81L (SS-1 - SS-20) construction 20.82L river crossing, crew working in close proximity to 1.81L 34 Hours
Continuous		  
23-Oct-26 07:00 25-Oct-26 18:00 ALTALINK Outage 671L (39s Bickerdike - 58s Edson), 39s 38 (39s Bickerdike), 39s 37 (39s Bickerdike), 58s 671 (58s Edson) 671L line maintenance 59 Hours
Continuous		  
23-Oct-26 07:00 25-Oct-26 17:00 ALTALINK TE AltaLink Telecom Equipment, APS# 185 890L/314L - 207S Overload Mitigation Scheme, APS# 188 740L (Bickerdike to Edson) Overload Mitigation Scheme, APS# 189 202L Overload Mitigation Scheme, APS# 190 720L Overload Mitigation Scheme fix the broken fibers of this OPGW on 671L 58 Hours
Continuous		  
23-Oct-26 08:00 23-Oct-26 16:00 ENMAX RB 1.80L (SS-1 - SS-28) fall tree trimming 8 Hours
Continuous		  
23-Oct-26 09:00 23-Oct-26 13:00 ALTALINK Outage 163s 1752 (163s Amoco Empress) 11/1552 breaker fail trip testing 4 Hours
Continuous		  
23-Oct-26 09:00 23-Oct-26 16:00 ALTALINK TE 207s RTU/SCADA (207s Pinedale), AltaLink Telecom Equipment radio maintenance and repan/sweep radio hop for issue correction 7 Hours
Daily		  
23-Oct-26 09:00 23-Oct-26 16:00 ATCO TE ATCO Telecom Equipment GhostPine_T-Telecom- 7750-2 Integration. 114s Scada outage during switch update will lose visibility for up to 2 hours. 7 Hours
Continuous		  
23-Oct-26 13:00 23-Oct-26 17:00 ALTALINK, BCH Outage 1L274 (BCH Elkford - BCH Elkford tap) placeholder for EFD 1D21, 1D2, 1D1 & 25D1 BC maintenance does not affect the Alberta ATC 4 Hours
Continuous		 AB-BC

Prepared On:   2026-10-14   15:43:27

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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