Alberta Electric System Operator
System Co-ordination Plan
2026-10-24 to 2026-10-30
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 16:00 ALTALINK Outage 256s C1 (256s Harmattan) forced outage 14,264 Hours
Continuous		  
27-Nov-25 08:30 27-Nov-27 17:30 ALTALINK TE 89s Protection & Control (89s Ellerslie) DSP card replacements on1057L B87/L3 and B240B1 B87/240B1 17,528 Hours
Daily		  
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 18:00 EPCOR Outage T1 (Woodcroft) woodcroft: TX1 LCR civil 6,048 Hours
Continuous		  
10-Mar-26 10:00 30-Nov-26 18:00 ATCO TE 743s RTU/SCADA (743s Sarah Lake) throughout the course of the project, different apparatus are being replaced, RTU will be blocked prior to download 6,368 Hours
Continuous		  
01-May-26 17:00 19-Feb-27 18:00 EPCOR Outage T1 (Meadowlark) T1 LCR civil work 4,993 Hours
Continuous		  
04-Jun-26 07:01 10-Feb-27 18:00 EPCOR Outage T1 (Rossdale) rossdale: TX1 lcr civil 6,034.98 Hours
Continuous		  
07-Jun-26 17:05 03-Nov-26 19:00 ACCIONA, ENBRIDGE, ICPCL Outage 139s C1 (139s Hillridge) forced outage 3,577.92 Hours
Continuous		  
08-Jun-26 07:00 15-Jan-27 18:00 EPCOR TE EP 511s Protection & Control (EP 511s Victoria) 72kV breaker fail protection blocking 2,626 Hours
Continuous		  
15-Jun-26 07:00 19-Mar-27 17:00 EPCOR TE 805s Protection & Control (805s Jasper) protection blocking, breaker replacement project 1,954 Hours
Continuous		  
19-Jun-26 17:00 01-May-27 17:00 EPCOR Outage EP 511s Victoria T3 (EP 511s Victoria) emergency outage due to degraded asset condition 12,769 Hours
Continuous		  
20-Jul-26 07:00 31-Dec-26 18:00 EPCOR TE Protection & Control (Woodcroft) woodcroft: protection blocking for TX1 LCR, line protection testing, and repairs 3,947 Hours
Continuous		  
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 11-Nov-26 15:00 ALTALINK, TRANSALTA Outage 320p GT3 (320p Keephills) maintenance 1,184 Hours
Continuous		  
08-Sep-26 07:00 18-Dec-26 18:00 EPCOR TE EP 803s Protection & Control (EP 803s Lambton) protection blocking, DFR upgrade cutovers and commissioning 2,435 Hours
Continuous		  
08-Sep-26 08:00 13-Nov-26 18:00 ALTALINK, REDDEER Outage 464L (87s Gaetz - 209s Timberlands), 209s 464E (209s Timberlands) P&C panel replacements, 138 kV bus and line arrestor testing, transformer testing 1,594 Hours
Continuous		  
08-Sep-26 09:00 13-Nov-26 18:00 ALTALINK, REDDEER Outage 768L (209s Timberlands - 217s North Red Deer), 209s T1 (209s Timberlands), 217s 768 (217s North Red Deer), 209s 768W (209s Timberlands) P&C panel replacements, 138 kV bus and line arrestor testing, transformer testing 1,593 Hours
Continuous		  
12-Sep-26 08:00 27-Nov-26 17:00 SUNCOR Outage 29EDD-18 29PT-100 (29EDD-18 Firebag) replace secondary cables on 29PT-100 1,833 Hours
Continuous		  
14-Sep-26 08:00 17-Dec-26 18:00 ATCO TE 738s RTU/SCADA (738s Virginia Hills), 738s Protection & Control (738s Virginia Hills) SCADA/protection upgrade at 738s Virginia Hills, cut over to the new SCADA system and tested 2,266 Hours
Continuous		  
14-Sep-26 21:53 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 20:00 ATCO TE 888s RTU/SCADA (888s Dover) RTU updates for 9L74 protection upgrade 1,233 Hours
Continuous		  
21-Sep-26 10:00 27-Nov-26 14:00 ATCO Outage 706s 701T (706s Irish Creek), 706s 701 (706s Irish Creek) breaker, transformer and voltage regulator maintenance 268 Hours
Continuous		  
28-Sep-26 07:00 31-Dec-26 18:00 EPCOR Outage 816s T1 (816s Petrolia) emergency outage - tap changer gassing 2,267 Hours
Continuous		  
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		  
04-Oct-26 12:00 06-Nov-26 19:00 ENMAX Outage 8.6TR (SS-8) fire alarm system upgrade 799 Hours
Continuous		  
05-Oct-26 08:00 28-Nov-26 20:00 ALTALINK Outage 62s T2 (62s Brazeau Plant), 62s 2 (62s Brazeau Plant) maintenance 1,295 Hours
Continuous		  
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
11-Oct-26 08:00 23-Nov-26 17:00 ENMAX Outage 32.1TR (SS-32) oil containment replacement 1,041 Hours
Continuous		  
12-Oct-26 07:00 05-Nov-26 19:00 ALTALINK TE 304s RTU/SCADA (304s Shell Limestone) RTU configuration update 588 Hours
Daily		  
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 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 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 08:00 30-Oct-26 16:00 ALTALINK TE 163s Protection & Control (163s Amoco Empress) circuit cutovers 416 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 19:00 ALTALINK Outage 799L (235s Entwistle - 443s South Mayerthorpe), 235s 799N (235s Entwistle) rebuild structure and restring OPGW 1,594 Hours
Continuous		  
15-Oct-26 08:00 18-Dec-26 16:00 ENMAX Outage 5.7TR (SS-5) 25kV Bus. pull in 25kV feeder cables. ground 25kV Bus 368 Hours
Continuous		  
16-Oct-26 08:00 05-Nov-26 18:00 ATCO, ALTALINK RB 12L41 (510s Sunnybrook - 939s Livock) installing replacement corona rings on 12L41 due to failure 490 Hours
Continuous		  
16-Oct-26 08:00 05-Nov-26 18:00 ATCO, ALTALINK RB 12L41 (510s Sunnybrook - 939s Livock) installing replacement corona rings on 12L41 due to failure 490 Hours
Daily		  
18-Oct-26 16:00 09-Nov-26 15:00 ALTALINK IO 38s T8 (38s East Edmonton), 38s 4852 (38s East Edmonton) T8 install, close 38s open point G 527 Hours
Continuous		  
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 08:00 30-Oct-26 16:00 ALTALINK TE 356s RTU/SCADA (356s Milo) RTU updates 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 protection 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 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 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 13:00 04-Nov-26 17:00 ALTALINK Outage 62s T2 (62s Brazeau Plant), 62s 2 (62s Brazeau Plant) breaker maintenance 388 Hours
Daily		  
19-Oct-26 16:01 04-Nov-26 17:00 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 25-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 12:30 27-Oct-26 16:00 ENMAX Outage 20.82L (SS-20 - SS-21), 20B138-20.82 (SS-20), 21B138-20.82 (SS-21) construction 20.82L 123.5 Hours
Continuous		  
21-Oct-26 08:00 05-Nov-26 17:00 Syncrude Outage T1 (Aurora), 260kV Bus 1 (Aurora), 211 (Aurora), 221 (Aurora), 72 kV Bus 1 (Aurora), 89-210 (Aurora), 21 (Aurora), 31 (Aurora), 11 (Aurora), 89-51 (Aurora) 6yr pm 345 Hours
Continuous		  
21-Oct-26 08:00 05-Nov-26 17:00 Syncrude Outage UT2 (Aurora), 22 (Aurora), 21 (Aurora), 89-25 (Aurora) zone 9 6yr pm 417 Hours
Continuous		  
21-Oct-26 12:00 30-Oct-26 11:00 ATCO Outage 850s 701T (850s Rainbow Cogen), 850s 433 (850s Rainbow Co-Gen) maintenance 215 Hours
Continuous		  
21-Oct-26 12:00 30-Nov-26 17:00 ALTALINK, Lethbridge RB 725LW (674s Bowron - 725BL tap), 725LE (674s Bowron - 725AL tap) ongoing CVT issue and the transient voltages observed at the relays (forced) 965 Hours
Continuous		  
22-Oct-26 08:00 27-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), 29EDD-2 29PS-6 (29EDD-2 Tar Island) settings change 156 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 09:00 27-Oct-26 20:00 EPCOR, Fording Outage 8L10 (330P Genesee - Fording Coal Mine), 330p 808 (330p Genesee), FCLCB1 (330p Genesee) 8L10 Line: emergency pole replacement 97 Hours
Continuous		  
22-Oct-26 13:00 31-Dec-27 18:00 ALTALINK, Keyera Cynthia Outage 359s T2 (359s Esso West Pembina), 359s 14 (359s Esso West Pembina) T2 maintenance 10,445 Hours
Continuous		  
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		  
24-Oct-26 07:00 25-Oct-26 17:00 ALTALINK, EPCOR Outage 1044L (EP 805s Jasper - 816s Petrolia), 816s P2405 (816s Petrolia), 816s P2406 (816s Petrolia), 816s PDS14 (816s Petrolia) petrolia/1044L: CT wiring changes 34 Hours
Continuous		  
24-Oct-26 08:00 24-Oct-26 16:00 ENMAX Outage 162B138-RB81 (SS-162) hv breaker SF6 gas sample - 162B138-RB81 8 Hours
Continuous		  
25-Oct-26 07:00 25-Oct-26 17:00 ALTALINK Outage 831L (339s Duchess - 831AL tap), 831AL (227s Cutting Lake - 831L tap), 831L (121s Brooks - 831AL tap), 121s 831N (121s Brooks), 227s 831AW (227s Cutting Lake), 339s 831 (339s Duchess) install bird flight diverters in ahead spans 10 Hours
Continuous		  
25-Oct-26 08:00 25-Oct-26 18:00 ENMAX Outage 22.81L (SS-22 - SS-39), 22.3TR (SS-22), 22.2TR (SS-22), 22B138-22BT8 (SS-22), 39B138-22.81 (SS-39), SW84 (SS-22) switch 85 and 22.3TR MD maintenance 10 Hours
Continuous		  
26-Oct-26 01:00 26-Oct-26 05:00 ALTALINK, BCH Outage 1L274 (BCH Elkford - BCH Elkford tap) disconnect replacement BC maintenance does not affect the Alberta ATC 4 Hours
Continuous		 AB-BC
26-Oct-26 01:00 26-Oct-26 05:00 ALTALINK, BCH IO 887L (48s Pocaterra - 978s BCH Britt Creek) TY2051 HV Disconnect Replacement Project OSP 4 Hours
Continuous		  
26-Oct-26 04:00 11-Dec-26 18:00 EPCOR Outage 814s T2 (814s Bellamy), BR722 (Rossdale), 814s B2402 (814s Bellamy), 814s B2406 (814s Bellamy), R721 (Rossdale), RR723 (Rossdale), 814s BAB2 (814s Bellamy) Bellamy: TX2 emergency bushing replacement and rossdale TX1 installation 1,283 Hours
Continuous		  
26-Oct-26 05:00 26-Oct-26 08:00 ALTALINK, BCH IO 887L (48s Pocaterra - 978s BCH Britt Creek) BC Hydro: E-Plan test energize new equipment from NTL circuit breaker through 1L274, EFT & 1L274E 1D21, 1D1, 1D2 & 25D1

3 Hours
Continuous		  
26-Oct-26 05:01 26-Oct-26 08:00 ALTALINK, BCH Outage 1L274 (BCH Natal - BCH Line Creek tap), 1L274 (BCH Elkford tap - BCH Line Creek tap) test energize new equipment 2.98 Hours
Continuous		 AB-BC
26-Oct-26 06:00 30-Oct-26 19:00 ALTALINK RB 610L (83s Taber - 336s Fincastle) install temporary understrung line, stringing wire 109 Hours
Daily		  
26-Oct-26 07:00 18-Dec-26 18:00 EPCOR Outage 805s T3 (805s Jasper), EP 805s J2404 (EP 805s Jasper), EP 805s J2405 (EP 805s Jasper), EP 805s JAB3 (EP 805s Jasper) Jasper: J2404/JAB3/JDS9 replacement LCR 1,283 Hours
Continuous		  
26-Oct-26 07:00 30-Oct-26 17:00 ALTALINK, EPCOR Outage 909L (89s Ellerslie - 665s Dome), 72DS26 (665s Dome - Strathcona), 665s D2401 (665s Dome), 665s D2404 (665s Dome), 665s DDS13 (665s Dome), 665s DAB3 (665s Dome) 909LE/Dome: Dome CVT LCR and 909LE metering upgrade 106 Hours
Continuous		  
26-Oct-26 07:00 30-Oct-26 17:00 ALTALINK, EPCOR Outage 909L (89s Ellerslie - 665s Dome), 89s 1052 (89s Ellerslie), 89s 1152 (89s Ellerslie) 909LE/Dome: Dome CVT LCR and 909LE metering upgrade 106 Hours
Continuous		  
26-Oct-26 07:00 28-Oct-26 11:30 EPCOR Outage EP 511s V723 (EP 511s Victoria) Victoria: V723, breaker fail upgrade cutovers and commissioning 52.5 Hours
Continuous		  
26-Oct-26 07:00 28-Oct-26 17:00 ALTALINK Outage 906L (17s Benalto - 42s Sarcee), 17s 5 (17s Benalto), 17s 4 (17s Benalto), 42s 906N (42s Sarcee) install bird flight diverters in ahead spans of 906L 58 Hours
Continuous		  
26-Oct-26 07:00 28-Oct-26 17:00 ALTALINK RB 928L (17s Benalto - 42s Sarcee) installing bird flight diverters on 906L side of double circuit towers 58 Hours
Daily		  
26-Oct-26 07:00 26-Oct-26 18:00 ALTALINK Outage 858L (40s Wetaskiwin - 289s Saunders Lake), 289s 1152 (289s Saunders Lake), 289s 1252 (289s Saunders Lake), 40s 858N (40s Wetaskiwin) 858L line maintenance 11 Hours
Continuous		  
26-Oct-26 07:00 26-Oct-26 18:00 ALTALINK RB 197s 174W (197s Bardo), 289s 652 (289s Saunders Lake), 289s 852 (289s Saunders Lake), 174L (197s Bardo - 289s Saunders Lake) work on adjacent 858L 11 Hours
Continuous		  
26-Oct-26 07:00 26-Oct-26 17:00 EPCOR Outage 72RG1 (Garneau - Rossdale), RG7210 (Rossdale), GDS18 (Garneau) Rossdale: RG7210, dfr upgrade cutovers and commissioning 10 Hours
Continuous		  
26-Oct-26 07:00 27-Oct-26 17:00 EPCOR Outage T2 (EP Hardisty) Hardisty: TX2, calisto repair 34 Hours
Continuous		  
26-Oct-26 08:00 04-Nov-26 17:00 ATCO RB 7L12 (834s Wesley Creek - 7LA12 tap), 7L12 (780s Lubicon - 7LA12 tap) taking openers J1 and J2 off the line after replacing both switches 7L12D2 and 7L12D3 225 Hours
Continuous		  
26-Oct-26 08:00 13-Nov-26 18:00 ATCO Outage 806s 701T (806s Oldman River), 806s 152 (806s Oldman River), 806S 52-1 (806s Oldman River), 806S 52-2 (806s Oldman River), 806S 89AS (806s Oldman River) telecommunications upgrade 442 Hours
Continuous		  
26-Oct-26 08:00 13-Nov-26 18:00 ATCO TE 806s RTU/SCADA (806s Oldman River), 806s Protection & Control (806s Oldman River) telecommunications upgrade, new UPS upgrades SCADA will be down most of the time as well 442 Hours
Continuous		  
26-Oct-26 08:00 28-Oct-26 18:00 ALTALINK RB 927L (102s Langdon - 356s Milo) proximity work on 924L 58 Hours
Daily		  
26-Oct-26 08:00 28-Oct-26 18:00 ALTALINK Outage 924L (102s Langdon - 356s Milo), 356s 952 (356s Milo), 356s 852 (356s Milo), 102s 6952 (102s Langdon), 102s 6852 (102s Langdon) interphase spacer replacement. 924L and wire inspection 58 Hours
Continuous		  
26-Oct-26 08:00 30-Oct-26 16:00 ALTALINK TE 163s RTU/SCADA (163s Amoco Empress), 394s RTU/SCADA (394s Empress) supervisory outages required for SCADA configuration updates involving new 11/1552 protection 104 Hours
Daily		  
26-Oct-26 08:00 05-Nov-26 17:00 ALTALINK TE 562s Protection & Control (562s Cypress) protection outages to implement/test fault reporting settings changes as well implement new firmware updates 249 Hours
Daily		  
26-Oct-26 08:00 05-Nov-26 17:00 ALTALINK TE 562s RTU/SCADA (562s Cypress) RTU outage to implement fault reporting settings changes 249 Hours
Daily		  
26-Oct-26 08:00 30-Oct-26 16:00 ALTALINK TE 368s RTU/SCADA (368s Burdett) SCADA configuration updates required for the addition of new T2 beckwith controller, communications, tap position, and controls, restored each night. 104 Hours
Daily		  
26-Oct-26 08:00 30-Oct-26 16:00 ENMAX Outage 31.1TR (SS-31) installation of new surge arrestors. secondary cabinet hinge install 104 Hours
Continuous		  
26-Oct-26 08:00 29-Oct-26 16:00 ENMAX Outage 2.84L (SS-2 - SS-8) cathodic protection installation 80 Hours
Continuous		  
26-Oct-26 08:00 26-Oct-26 16:00 ALTALINK TE 102s RTU/SCADA (102s Langdon) investigate L8 927L SEL-351A PMU and LAN-ES9 RSG2100 ethernet switch 8 Hours
Daily		  
26-Oct-26 08:00 30-Oct-26 16:00 ATCO TE 749s Flyingshot Lake Protection & Control, 749s Flyingshot Lake RTU/SCADA, 7L33 (749s Flyingshot Lake - 7LA33 tap), 7L33 (845s Big Mountain - 7LA33 tap), 7L44 (749s Flyingshot Lake - 845s Big Mountain) protection setting change and RTU updates 104 Hours
Continuous		  
26-Oct-26 08:00 30-Oct-26 16:00 ATCO, CGE TE 845s Protection & Control (845s Big Mountain), 845s RTU/SCADA (845s Big Mountain), 7L33 (749s Flyingshot Lake - 7LA33 tap), 7L33 (845s Big Mountain - 7LA33 tap), 7LA33 (758s Grande Prairie EcoPower Centre - 7L33 tap), 7L44 (749s Flyingshot Lake - 845s Big Mountain) protection setting change and RTU updates 104 Hours
Continuous		  
26-Oct-26 08:00 30-Oct-26 18:00 ALTALINK RB 472AL (221s Sunken Lake - 472L tap), 472L (213s Hughenden - 472AL tap), 472L (648s Metiskow - 472AL tap) replace arm and insulation 106 Hours
Daily		  
26-Oct-26 08:00 05-Nov-26 17:00 ALTALINK TE 194s RTU/SCADA (194s South Red Deer) 194s SCADA equipment upgrade 249 Hours
Daily		  
26-Oct-26 08:00 27-Oct-26 16:00 ALTALINK TE 397s RTU/SCADA (397s Benbow) under frequency load sheading salvage work, techs to remove alarms from the RTU 32 Hours
Daily		  
26-Oct-26 08:00 27-Oct-26 16:00 ALTALINK TE 397s Protection & Control (397s Benbow) through fault settings change on T1A 32 Hours
Daily		  
26-Oct-26 08:00 26-Oct-26 16:00 ALTALINK TE 510s Protection & Control (510s Sunnybrook) techs to complete through fault settings changes on T1B and T2B
8 Hours
Continuous		  
26-Oct-26 08:00 27-Oct-26 18:00 ENMAX Outage 39.82L (SS-39 - SS-162), 22.81L (SS-22 - SS-39), 39.2TR (SS-39), 39.4TR (SS-39), 39B138-22.81 (SS-39), 22B138-22.81 (SS-22), SW83 (SS-39), 39MD138-39.2TR (SS-39), 39MD138-39.4TR (SS-39), 162MD138-39.82 (SS-162) hv sw maintenance SW82, SW83, MD-39.2TR. sw82 at SS39 needs adjustment. 39.2TR MD whip not reset (centre phase), reversing switch check, oil sampling 34 Hours
Continuous		  
26-Oct-26 08:00 06-Nov-26 15:00 CMH TE MH-60L (MHS-5 NE Crescent Heights - MHS-7 Brier Park) maintenance on the relay LDR-60L-A at Northeast Crescent Heights (NECH) substation 271 Hours
Continuous		  
26-Oct-26 08:00 29-Oct-26 16:00 ALTALINK TE 304s Protection & Control (304s Shell Limestone) install temp setting prior to T2A protection outage and update relay IP address and DNP settings 80 Hours
Daily		  
26-Oct-26 08:00 29-Oct-26 16:00 ATCO, ALTALINK RB 7L230 (743s Sarah Lake - 888AL tap) walk up climbing inspection on 7L230 80 Hours
Continuous		  
26-Oct-26 08:00 26-Oct-26 16:00 ALTALINK TE 312s Protection & Control (312s Fidler) outage to install temp settings for 893L 8 Hours
Continuous		  
26-Oct-26 08:00 26-Oct-26 16:00 ALTALINK, WINDYPWPL, ATCO TE 112s Protection & Control (112s Windy Point), 893AL (112s Windy Point - 893L tap), 893BL (806s Oldman River - 893L tap), 893L (312s Fidler - 893AL tap) install temporary settings to help facilitate ATCO work at 806s 8 Hours
Continuous		  
26-Oct-26 08:00 26-Oct-26 16:00 ENMAX RB 3.84L (SS-3 - SS-13) fall tree trimming 8 Hours
Continuous		  
26-Oct-26 08:00 30-Oct-26 15:00 CMH Outage 4L (MHS-1 CMH Power Plant - MHS-6 CMH Riverview), MH-12L (MHS-8 Burnside - MHS-6 CMH Riverview), MHS-6 MH69-601 (MHS-6 CMH Riverview), MHS-6 MH69-603 (MHS-6 CMH Riverview), MHS-6 MH69-605 (MHS-6 CMH Riverview), MHS-6 MH69-606 (MHS-6 CMH Riverview), MHS-6 MH69-617 (MHS-6 CMH Riverview), MHS-6 MH69-602 (MHS-6 CMH Riverview), MHS-6 MH69-604 (MHS-6 CMH Riverview), MHS-6 MH69-607 (MHS-6 CMH Riverview), MHS-6 MH69-616 (MHS-6 CMH Riverview), MHS-8 MH69-801 (MHS-8 Burnside) breaker maintenance 103 Hours
Continuous		  
26-Oct-26 08:00 29-Oct-26 16:00 ALTALINK RB 7L230 (69s North Barrhead - 888AL tap) wake up climbing inspection on 7L230 80 Hours
Daily		  
26-Oct-26 08:00 29-Oct-26 16:00 ALTALINK TE 510s RTU/SCADA (510s Sunnybrook) update alarm 80 Hours
Daily		  
26-Oct-26 08:00 30-Oct-26 16:00 ALTALINK TE 353s RTU/SCADA (353s Plamondon) RTU outage 104 Hours
Daily		  
26-Oct-26 08:00 13-Nov-26 17:00 ALTALINK TE 312s Protection & Control (312s Fidler) ATCO is performing a UPS swap at 806s 441 Hours
Continuous		  
26-Oct-26 08:00 30-Oct-26 16:00 ENMAX Outage 6.1TR (SS-6) calisto replacement 104 Hours
Continuous		  
26-Oct-26 08:00 04-Nov-26 17:00 ENMAX Outage 7.1TR (SS-7) 7 sub Z11 bus diff replacement 225 Hours
Continuous		  
26-Oct-26 08:00 26-Oct-26 16:00 ALTALINK TE 131s Protection & Control (131s Moon Lake) standard relay maintenance. 8 Hours
Daily		  
26-Oct-26 08:30 29-Oct-26 16:00 ATCO Outage 9L74 (888s Dover - 960s Birchwood Creek), 888s 905 (888s Dover), 888s 906 (888s Dover), 960s 901 (960s Birchwood Creek), 960s 902 (960s Birchwood Creek) 21A/9L74 relay three terminal line testing 78 Hours
Continuous		  
26-Oct-26 08:30 28-Oct-26 16:00 ALTALINK TE AltaLink Telecom Equipment de-energize 9485R AESO radio 55.5 Hours
Continuous		  
26-Oct-26 09:00 26-Oct-26 17:30 ATCO Outage 757s 704 (757s Battle River), 757s 704T (757s Battle River) breaker SF6 testing, PRC-005 trip coil testing
 32 Hours
Continuous		  
26-Oct-26 09:00 27-Oct-26 17:00 ALTALINK Outage 807L (233s Beamer - 807AL tap), 807L (410s Josephburg - 807AL tap), 233s 807X (233s Beamer), 410s 752 (410s Josephburg), 410s 652 (410s Josephburg) replacement of faulty 52a/b contact cam shaft to fix incorrect MOD status issue and mitigate nuisance tripping, will be operating switch after replacement, SOC will receive alarms/ status updates during testing
32 Hours
Continuous		  
26-Oct-26 10:00 27-Oct-26 16:00 ATCO, ALTALINK Outage 807AL (402s Scotford Expansion One - 807L tap) replacement of faulty 52a/b contact cam shaft to fix incorrect MOD status issue and mitigate nuisance tripping 30 Hours
Continuous		  
26-Oct-26 10:00 30-Oct-26 18:00 ATCO TE 2075s Protection & Control (2075s Newell) EN100 firmware update on the AC busbar connection protection relays and the AC Filter connection protection relays 104 Hours
Continuous		  
26-Oct-26 10:00 29-Oct-26 16:00 ALTALINK, WINDYPWPL, ATCO TE AltaLink Telecom Equipment, 893AL (112s Windy Point - 893L tap), 893BL (806s Oldman River - 893L tap), 893L (312s Fidler - 893AL tap) ATCO UPS replacement 78 Hours
Continuous		  
26-Oct-26 11:00 04-Nov-26 12:00 ALTALINK Outage 163s 1252 (163s Amoco Empress) breaker failure & control protection upgrade 217 Hours
Continuous		  
26-Oct-26 11:00 29-Oct-26 15:00 ATCO RB 6L56 (763s Hanna - 802s Michichi Creek) 10 year climbing inspection 76 Hours
Continuous		  
26-Oct-26 13:00 26-Oct-26 15:00 ATCO Outage 930s 701 (930s Arcenciel) PRC-005 trip coil testing 2 Hours
Continuous		  
26-Oct-26 13:00 26-Oct-26 17:00 ALTALINK, BCH IO 887L (48s Pocaterra - 978s BCH Britt Creek) BC hydro outage having 887L/1L274 out from EFD 1D21 to EFT 1D22, 1D2, 1D1 for 3 Hours
Continuous		  
26-Oct-26 15:01 26-Oct-26 17:00 ATCO Outage 930s 702 (930s Arcenciel) PRC-005 -trip coil testing 1.98 Hours
Continuous		  
27-Oct-26 07:00 28-Oct-26 17:00 ALTALINK Outage 368s T2 (368s Burdett), 368s 42 (368s Burdett) installation of new Beckwith controller, tap position sensor and I-bridge devices for remote communication and controls 34 Hours
Continuous		  
27-Oct-26 08:00 28-Oct-26 17:30 ALTALINK RB 1038L (138s Windy Flats - 266s SC1), 1038L (237s Foothills - 266s SC1) proximity for 1037L work at str 285 and 334 33.5 Hours
Daily		  
27-Oct-26 08:00 28-Oct-26 17:30 ALTALINK RB 1037L (138s Windy Flats - 266s SC1), 1037L (237s Foothills - 266s SC1) install vibration monitors and weather stations 33.5 Hours
Daily		  
27-Oct-26 08:00 29-Oct-26 17:00 ALTALINK Outage 688AL (284s Nose Creek - 688L tap) switchgear maintenance 57 Hours
Continuous		  
27-Oct-26 08:00 27-Oct-26 16:00 ALTALINK TE 178s Protection & Control (178s Cynthia) settings change 8 Hours
Daily		  
27-Oct-26 08:00 27-Oct-26 16:00 ENMAX RB 3.84L (SS-3 - SS-13) fall tree trimming 8 Hours
Continuous		  
27-Oct-26 08:00 27-Oct-26 17:00 ALTALINK TE 149s Protection & Control (149s Nisku) initiate trip signal from breaker fail protections to T3 low side breaker 149s45 9 Hours
Daily		  
27-Oct-26 08:00 27-Oct-26 16:00 ALTALINK TE AltaLink Telecom Equipment upgrade software on radio hop to mitigate maintenance issues, perform site maintenance 8 Hours
Daily		  
27-Oct-26 08:00 29-Oct-26 16:00 ALTALINK TE 103s Protection & Control (103s Goose Lake) PRC maintenance on redundant protections 56 Hours
Daily		  
27-Oct-26 08:00 27-Oct-26 17:00 ATCO TE 963s RTU/SCADA (963s Coyote Lake), ATCO Telecom Equipment both firewalls at the COYOTE LAKE substation will undergo a scheduled upgrade 9 Hours
Continuous		  
27-Oct-26 08:00 27-Oct-26 17:00 ATCO TE 827s RTU/SCADA (827s Cranberry Lake) both firewalls at the Cranberry substation will undergo a scheduled upgrade 9 Hours
Continuous		  
27-Oct-26 08:00 27-Oct-26 17:00 ALTALINK TE 431s Protection & Control (431s Hussar) relay setting change and testing 9 Hours
Continuous		  
27-Oct-26 08:30 30-Oct-26 16:30 ALTALINK Outage 836L (61s Lodgepole - 283s Violet Grove), 61s 836N (61s Lodgepole), 283s 836 (283s Violet Grove) CT replacement 80 Hours
Continuous		  
27-Oct-26 09:00 27-Oct-26 10:59 ATCO Outage 930s 703 (930s Arcenciel) PRC-005 - trip coil testing
1.98 Hours
Continuous		  
27-Oct-26 09:00 28-Oct-26 17:00 ATCO TE ATCO Telecom Equipment telecom upgrade 32 Hours
Continuous		  
27-Oct-26 09:00 29-Oct-26 17:00 ALTALINK Outage 953s T2 (953s Lake Louise), 953s 50 (953s Lake Louise), 953s 51 (953s Lake Louise) 953sT2 TC maintenance, leak repair, doble 56 Hours
Continuous		  
27-Oct-26 09:00 27-Oct-26 10:30 ATCO TE ATCO Telecom Equipment upgrading coyote 'A' SAR AND highland 'A' SAR OS TO V21, then V22 1.5 Hours
Continuous		  
27-Oct-26 09:00 27-Oct-26 17:00 ALTALINK Outage 38s C1 (38s East Edmonton), 38s 3052 (38s East Edmonton) breaker maintenance 8 Hours
Daily		  
27-Oct-26 10:00 03-Nov-26 17:00 ATCO TE 939s RTU/SCADA (939s Livock), 939s Protection & Control (939s Livock) relay software vulnerability patching 175 Hours
Continuous		  
27-Oct-26 11:00 27-Oct-26 12:59 ATCO Outage 930s 704 (930s Arcenciel) PRC-005 - trip coil testing 1.98 Hours
Continuous		  
27-Oct-26 13:00 27-Oct-26 15:00 ATCO Outage 930s 706 (930s Arcenciel) PRC-005 - trip coil testing 2 Hours
Continuous		  
28-Oct-26 07:00 28-Oct-26 17:00 EPCOR Outage 557s CD2401 (557s Castle Downs) Castledowns: CD2401 NAIT student substation tour 10 Hours
Continuous		  
28-Oct-26 07:00 28-Oct-26 17:00 ALTALINK Outage 284s T1 (284s Nose Creek) retrofit meter module for T1 with new ION9000 10 Hours
Continuous		  
28-Oct-26 07:00 30-Oct-26 17:00 ALTALINK, EPCOR TE 1209L (89s Ellerslie - 330p Genesee) protection blocking, firmware updates 58 Hours
Continuous		  
28-Oct-26 08:00 28-Oct-26 17:00 ALTALINK Outage 28s T3 (28s West Brooks) 28s T3 install continuous loops for LA's high and low side 9 Hours
Continuous		  
28-Oct-26 08:00 28-Oct-26 18:00 ENMAX Outage 38.83L (SS-38 - SS-39), 39.82L (SS-39 - SS-162), 39.3TR (SS-39), 39.1TR (SS-39), 39B138-38.83 (SS-39), 39B138-39.82 (SS-39), SW84 (SS-39), 39MD138-39.1TR (SS-39), 39MD138-39.3TR (SS-39) HV SW maintenance SW84, oil sampling - 39.3-TC, bushing oil sampling - 39.1TR, SW87 at 39 sub east phase does not fully rotate in jaw 10 Hours
Continuous		  
28-Oct-26 08:00 29-Oct-26 16:00 ALTALINK TE 312s Protection & Control (312s Fidler) revert temporary settings once ATCO is completed with their equipment upgrade 32 Hours
Daily		  
28-Oct-26 08:00 29-Oct-26 16:00 ALTALINK, WINDYPWPL, ATCO TE 112s Protection & Control (112s Windy Point), 893AL (112s Windy Point - 893L tap), 893BL (806s Oldman River - 893L tap), 893L (312s Fidler - 893AL tap) revert settings back to original settings 32 Hours
Daily		  
28-Oct-26 08:00 28-Oct-26 16:00 ENMAX RB 9.80L (SS-9 - SS-31) fall tree trimming 8 Hours
Continuous		  
28-Oct-26 08:00 28-Oct-26 16:00 ENMAX RB 9.83L (SS-9 - SS-43) fall tree trimming 8 Hours
Continuous		  
28-Oct-26 08:00 28-Oct-26 16:00 ENMAX RB 2.81L (SS-2 - SS-9) fall tree trimming 8 Hours
Continuous		  
28-Oct-26 08:00 28-Oct-26 17:00 ATCO TE ATCO Telecom Equipment, 797s RTU/SCADA (797s Kemp River) resolve VPN issue 9 Hours
Continuous		  
28-Oct-26 08:00 28-Oct-26 17:00 ALTALINK TE 221s RTU/SCADA (221s Sunken Lake) telecom equipment maintenance 9 Hours
Daily		  
28-Oct-26 08:00 28-Oct-26 16:00 ALTALINK, GWPCORP IO AltaLink Telecom Equipment, 603L (138s Windy Flats - 243s Soderglen) customer reported communication equipment failure 8 Hours
Daily		  
28-Oct-26 08:00 28-Oct-26 17:00 ATCO TE ATCO Telecom Equipment, 717s RTU/SCADA (717S Ethel Lake) firewalls upgrade 9 Hours
Continuous		  
28-Oct-26 08:00 28-Oct-26 17:00 ATCO TE 2011s RTU/SCADA (2011s Dawes), ATCO Telecom Equipment firewalls upgrade 9 Hours
Continuous		  
28-Oct-26 08:00 28-Oct-26 16:00 ALTALINK, GWPCORP TE 603L (138s Windy Flats - 243s Soderglen) correct alarms 8 Hours
Daily		  
28-Oct-26 08:00 28-Oct-26 16:00 ALTALINK TE 138s 603 (138s Windy Flats) correct alarms 8 Hours
Continuous		  
28-Oct-26 08:00 30-Oct-26 17:00 SUNCOR TE 29EDD-34 RTU/SCADA (29EDD-34), 29EDD-1 RTU/SCADA (29EDD-1 Millennium) change few setting/ parameter configuration for Alberta DST changes and download again 57 Hours
Continuous		  
28-Oct-26 09:00 28-Oct-26 10:59 ATCO Outage 930s 707 (930s Arcenciel) PRC-005 trip coil testing 1.98 Hours
Continuous		  
28-Oct-26 09:00 28-Oct-26 10:00 ATCO, CGE TE ATCO Telecom Equipment, 722s RTU/SCADA (722s Crystal Lake), 749s Flyingshot Lake RTU/SCADA, 7L33 (749s Flyingshot Lake - 7LA33 tap), 7L33 (845s Big Mountain - 7LA33 tap), 7LA33 (758s Grande Prairie EcoPower Centre - 7L33 tap) Grande Prairie site office upgrade 1 Hour
Continuous		  
28-Oct-26 09:00 28-Oct-26 09:20 CMH TE MH-60L (MHS-5 NE Crescent Heights - MHS-7 Brier Park) facilitate fiber optic Integrity testing
0.33 Hours
Continuous		  
28-Oct-26 09:20 28-Oct-26 09:40 CMH TE MH-60L (MHS-5 NE Crescent Heights - MHS-7 Brier Park) facilitate fiber optic Integrity testing
0.33 Hours
Continuous		  
28-Oct-26 09:40 28-Oct-26 10:00 CMH TE MH-30L (MHS-3 Southridge - MHS-5 NE Crescent Heights) facilitate fiber optic Integrity testing 0.33 Hours
Continuous		  
28-Oct-26 10:00 28-Oct-26 14:00 ALTALINK, TRANSALTA Outage 250p T1 (250p Bighorn Plant), 250p 1 (250p Bighorn Plant) maintenance 4 Hours
Continuous		  
28-Oct-26 10:00 28-Oct-26 10:20 CMH TE MH-50L (MHS-2 North Industrial - MHS-5 NE Crescent Heights) facilitate fiber optic Integrity testing
0.33 Hours
Continuous		  
28-Oct-26 10:20 28-Oct-26 10:40 CMH TE MH-50L (MHS-2 North Industrial - MHS-5 NE Crescent Heights) fiber optic integrity testing
 0.33 Hours
Continuous		  
28-Oct-26 11:00 28-Oct-26 12:59 ATCO Outage 930s 708 (930s Arcenciel) PRC-005 trip coil testing 1.98 Hours
Continuous		  
28-Oct-26 13:00 28-Oct-26 14:59 ATCO Outage 930s 710 (930s Arcenciel) PRC-005 trip coil testing 1.98 Hours
Continuous		  
28-Oct-26 13:00 28-Oct-26 16:30 ALTALINK Outage 163s C1 (163s Amoco Empress), 163s 6352 (163s Amoco Empress) breaker fail trip testing 3.5 Hours
Continuous		  
29-Oct-26 06:00 04-Nov-26 19:00 SUNCOR Outage 635PL7-1003 (635EDD-1000 - 635EDD-1004), 635EDD-1000 635-752-163 (635EDD-1000), 635EDD-1000 635-752-162 (635EDD-1000), 635EDD-1000 635PS-1045 (635EDD-1000) Fort Hills: MP10 (Bottom) - planned maintenance of 144kV equipment 157 Hours
Continuous		  
29-Oct-26 07:00 29-Oct-26 10:30 ALTALINK Outage 163s C2 (163s Amoco Empress) 11/1252 & 11/15521 breaker fail trip testing 3.5 Hours
Continuous		  
29-Oct-26 08:00 31-Oct-26 18:00 ALTALINK Outage 927L (102s Langdon - 356s Milo) 927L - (urgent repair) replace 2 Interphase spacers in span 188 58 Hours
Continuous		  
29-Oct-26 08:00 31-Oct-26 18:00 ALTALINK RB 924L (102s Langdon - 356s Milo) proximity for work on 927L 58 Hours
Daily		  
29-Oct-26 08:00 29-Oct-26 17:00 ALTALINK Outage 28s R1 (28s West Brooks) 28s R1 install continuous loops for LA's grounding 9 Hours
Continuous		  
29-Oct-26 08:00 29-Oct-26 16:00 ENMAX, ALTALINK Outage 23.80L (74s Janet - SS-23), 23.4TR (SS-23), 74s 23.80W (74s Janet), 23B138-23.80 (SS-23) north phase braid hot spot - 90 deg C 8 Hours
Continuous		  
29-Oct-26 08:00 29-Oct-26 16:00 ENMAX, ALTALINK IO 23.80L (74s Janet - SS-23) north phase braid hot spot 8 Hours
Continuous		  
29-Oct-26 08:00 30-Oct-26 17:00 ALTALINK TE 580s RTU/SCADA (580s Sylvan Lake), AltaLink Telecom Equipment firewall upgrade, telecom LAN switch upgrade, MPLS nodes upgrade, raw socket conversion 33 Hours
Daily		  
29-Oct-26 08:00 29-Oct-26 16:00 ENMAX RB 2.83L (SS-5 - 2.83L tap), 2.83L (SS-2 - 2.83L tap), 2.83L (SS-13 - 2.83L tap) fall tree trimming 8 Hours
Continuous		  
29-Oct-26 08:00 29-Oct-26 17:00 ATCO TE 970s RTU/SCADA (970s Bourque), ATCO Telecom Equipment firewalls scheduled upgrade 9 Hours
Continuous		  
29-Oct-26 08:00 29-Oct-26 17:00 ATCO TE 722s RTU/SCADA (722s Crystal Lake), ATCO Telecom Equipment firewalls scheduled upgrade 9 Hours
Continuous		  
29-Oct-26 09:00 29-Oct-26 10:59 ATCO Outage 930s 711 (930s Arcenciel) PRC-005 trip coil testing 1.98 Hours
Continuous		  
29-Oct-26 09:00 29-Oct-26 10:00 ATCO TE ATCO Telecom Equipment upgrade Bridge Creek Net 1 SAR to V21, then V22 1 Hour
Continuous		  
29-Oct-26 09:00 29-Oct-26 12:30 ALTALINK Outage 669L (163s Amoco Empress - 562s Cypress), 163s 669 (163s Amoco Empress), 562s 669 (562s Cypress) 11/1252 & 11/15521 breaker fail trip testing 3.5 Hours
Continuous		  
29-Oct-26 09:00 30-Oct-26 17:00 ATCO TE ATCO Telecom Equipment MPLS life cycle upgrades 32 Hours
Continuous		  
29-Oct-26 10:00 29-Oct-26 14:00 ALTALINK Outage 250p 2 (250p Bighorn Plant) maintenance 4 Hours
Continuous		  
29-Oct-26 10:00 29-Oct-26 15:00 ATCO TE ATCO Telecom Equipment Big Mountain_S/Bridge Creek_S-Telecom- IRU radio major PM 4 Hours
Continuous		  
29-Oct-26 10:00 29-Oct-26 16:00 ATCO, ENBRIDGE TE ATCO Telecom Equipment, 658s RTU/SCADA (658s Chard) swapping site networking, switch update 6 Hours
Continuous		  
29-Oct-26 11:00 29-Oct-26 13:00 ATCO Outage 930s 712 (930s Arcenciel) PRC-005 -trip coil testing 2 Hours
Continuous		  
29-Oct-26 11:00 29-Oct-26 14:30 ALTALINK Outage 760L (163s Amoco Empress - 394s Empress), 163s 760X (163s Amoco Empress), 394s 760N (394s Empress) 11/1252 & 11/15521 breaker fail trip testing 3.5 Hours
Continuous		  
29-Oct-26 13:00 29-Oct-26 16:30 ALTALINK Outage 760L (163s Amoco Empress - 760AL tap), 163s 760N (163s Amoco Empress) 11/1252 & 11/15521 breaker fail trip testing 3.5 Hours
Continuous		  
29-Oct-26 14:00 29-Oct-26 16:30 ATCO IO 7L760 (767s Oyen - 7LC760 tap) reclosing blocked for AltaLink., AML will also be openning their portion of the line to perform work 2.5 Hours
Continuous		  
29-Oct-26 15:00 29-Oct-26 17:00 ATCO TE ATCO Telecom Equipment, 845s RTU/SCADA (845s Big Mountain), 808s RTU/SCADA (808s Procter & Gamble), 749s Flyingshot Lake RTU/SCADA SAR upgrade at Flyingshot Lake 2 Hours
Continuous		  
30-Oct-26 08:00 30-Oct-26 16:00 ENMAX RB 24.81L (SS-24 - SS-31) fall tree trimming 8 Hours
Continuous		  
30-Oct-26 08:00 31-Oct-26 16:00 ALTALINK TE AML 511s RTU/SCADA (AML 511s Crossings), AltaLink Telecom Equipment add intrusion alarms 32 Hours
Daily		  
30-Oct-26 08:00 30-Oct-26 16:00 ALTALINK TE 268s RTU/SCADA (268s Whitecourt), AltaLink Telecom Equipment telecom equipment maintenance 8 Hours
Daily		  

Prepared On:   2026-10-23   16:37:36

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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