Alberta Electric System Operator
System Co-ordination Plan
2025-02-27 to 2025-03-07
Approved Outages

Previous Version
Download CSV

From To Owner Type Element Scheduled Activity Date/Time Comments Interconnection
05-Oct-18 08:00 30-Jun-26 16:00 EPCOR IO C2 (Rossdale) forced outage 2,825.33 Days
Continuous		  
24-Oct-18 01:13 30-Jun-26 16:00 EPCOR IO C1 (Rossdale) forced outage 2,806.62 Days
Continuous		  
27-Nov-23 08:00 20-Jun-25 16:00 ENMAX Outage 32.2TR (SS-32) 32 sub 32.2TR 8 kV bus switchgear demolition 571.29 Days
Continuous		  
26-Jul-24 10:00 31-Mar-25 16:00 ATCO Outage 826s 504R (826s Marguerite Lake) emergency removal to replace failed 502R @834S 248.25 Days
Continuous		  
23-Aug-24 13:45 30-Apr-25 14:29 ALTALINK Outage 157s C1 (157s Lac La Biche) forced outage 250.03 Days
Continuous		  
23-Sep-24 10:00 15-May-25 12:00 ATCO TE 741s RTU/SCADA (741s Fox Creek) RTU configuration on new and old RTU's onsite 234.08 Days
Continuous		  
05-Oct-24 00:00 30-Apr-25 17:00 BHE Canada Outage 120s C1 (120s Picture Butte) forced outage 207.71 Days
Continuous		  
21-Oct-24 12:00 12-May-25 17:30 ATCO TE 741s Protection & Control (741s Fox Creek) block 144kv and 25 kv bus protection and breaker fail protection for the duration of 741s project 203.23 Days
Continuous		  
26-Dec-24 17:07 31-Mar-25 18:00 ALTALINK Outage 256s C1 (256s Harmattan) forced outage 95 Days
Continuous		  
03-Jan-25 07:00 07-Mar-25 17:00 EPCOR TE 805s Protection & Control (805s Jasper), 805s RTU/SCADA (805s Jasper) protection blocking for P&C maintenance at Jasper 63.42 Days
Continuous		  
06-Jan-25 09:30 21-Jun-25 18:00 ALTALINK Outage 150L (42s Sarcee - 150AL tap), 42s 150W (42s Sarcee) arctic arrow will require a GOI on 150L to rebuild the section of line from structure 47-198. 166.31 Days
Continuous		  
13-Jan-25 07:00 03-Mar-25 17:00 EPCOR Outage 987s T2 (987s Clover Bar), 987s C2406 (987s Clover Bar), 987s C2410 (987s Clover Bar), 987s C2409 (987s Clover Bar), 987s CC721 (987s Clover Bar), 987s CDS45 (987s Cloverbar), 987s CDS31 (987s Clover Bar) Cloverbar TX2 and 1191L bay outage 49.42 Days
Continuous		  
13-Jan-25 07:00 04-Apr-25 17:00 EPCOR TE 330p Protection & Control (330p Genesee), 330p RTU/SCADA (330p Genesee) Genessee - 138/500 kV protection blocking for relay maintenance and configuration changes 81.38 Days
Continuous		  
03-Feb-25 07:00 04-Apr-25 17:30 ATCO TE 769s Protection & Control (769s Stettler), 769s RTU/SCADA (769s Stettler) new RTU installation at 769S 60.4 Days
Continuous		  
03-Feb-25 09:00 28-Mar-25 17:00 ATCO TE 730s RTU/SCADA (730s Rycroft) change RTU configuration 53.29 Days
Continuous		  
10-Feb-25 00:00 30-Jun-25 23:59 ATCO, ALTALINK IO 840s McNeill Station, 830L (562s Cypress - 840s McNeill Station), 840s 701T (840s McNeill Station), 840s 901T (840s McNeill Station) available for emergency use only 140.96 Days
Continuous		 AB-SK
10-Feb-25 09:00 14-Mar-25 17:00 BCH Outage T3 (BCH Natal) station rebuild 32.29 Days
Continuous		 AB-BC
10-Feb-25 09:00 28-Feb-25 17:00 BCH TE 2L113 (BCH Cranbrook - BCH Natal), T3 (BCH Natal) protection work 18.33 Days
Continuous		 AB-BC
10-Feb-25 09:00 28-Feb-25 17:00 BCH Outage 2CB1 (BCH Natal) NTL station rebuild 18.33 Days
Continuous		 AB-BC
11-Feb-25 10:00 28-Mar-25 16:00 ATCO TE 940s Protection & Control (940s Beartrap) relay testing 45.21 Days
Continuous		  
17-Feb-25 07:00 06-Mar-25 17:00 ALTALINK TE 498s RTU/SCADA (498s Tilley) update RTU for line protection upgrades for alderson project 17.42 Days
Daily		  
17-Feb-25 07:00 28-Feb-25 17:00 EPCOR TE Protection & Control (EPCOR Hardisty) hardisty: 72kV Protection blocking for relay maintenance 11.42 Days
Continuous		  
17-Feb-25 07:00 06-Mar-25 17:00 ALTALINK TE 28s RTU/SCADA (28s West Brooks) update RTU for Line protection upgrades 17.42 Days
Daily		  
17-Feb-25 07:00 06-Mar-25 17:00 ALTALINK TE 244s RTU/SCADA (244s Bowmanton) update RTU for line protection upgrades 17.42 Days
Daily		  
17-Feb-25 07:00 06-Mar-25 17:00 ALTALINK TE 895s RTU/SCADA (895s Suffield) update RTU for line protection upgrades for alderson project 17.42 Days
Daily		  
18-Feb-25 07:00 28-Feb-25 17:30 ATCO TE 769s Protection & Control (769s Stettler), 769s RTU/SCADA (769s Stettler) RTU, transformer tap position indication and control, metering 10.44 Days
Continuous		  
18-Feb-25 07:00 07-Mar-25 17:00 EPCOR Outage 72RG7 (Garneau - Rossdale), T1 (Garneau), G722 (Garneau), G723 (Garneau), G721 (Garneau), GDS4 (Garneau), GAB1 (Garneau) TX1/RG7 zone- 72kV switchgear SF6 overhaul with GE 17.42 Days
Continuous		  
18-Feb-25 08:00 03-Mar-25 12:00 ATCO Outage 9L10 (876s Brintnell - 939s Livock), 939s 911 (939s Livock), 939s 910 (939s Livock), 939s 903T (939s Livock) line to ground mitigation 13.17 Days
Continuous		  
18-Feb-25 10:00 03-Mar-25 11:00 ATCO Outage 741s 705C (741s Fox Creek) Fox Creek substation upgrade project, demo old cabling, install new cabling and cut over to new protection 13.04 Days
Continuous		  
20-Feb-25 10:00 28-Feb-25 17:00 ATCO Outage 6L44 (769s Stettler - 778s Big Valley), 6L02 (769s Stettler - 873s Marion Lake), 769s 703T (769s Stettler), 778s 601T (778s Big Valley), 769s 703 (769s Stettler), 769s 603 (769s Stettler), 769s 602 (769s Stettler), 769s 601 (769s Stettler), 778s 601TD (778s Big Valley), 769s 503TD1 (769s Stettler) install new 6L02/6L44 panels, cutover 6L44 A&B protections 8.29 Days
Continuous		  
21-Feb-25 09:00 27-Feb-25 17:00 ATCO RB 7L15 (841s Long Lake - 856s Kinosis)
13 structures to be replaced plus one add-in structure 		6.33 Days
Continuous		  
21-Feb-25 14:31 13-Mar-25 17:00 ATCO TE 730s Protection & Control (730s Rycroft) bus protection relay blocking for mobile installation 20.06 Days
Continuous		  
24-Feb-25 07:00 13-Mar-25 17:00 ATCO Outage 730s 701T (730s Rycroft) install new relays 17.38 Days
Continuous		  
24-Feb-25 07:00 28-Feb-25 17:00 ATCO TE 2075s Protection & Control (2075s Newell) Isolate and replace SEL AC bus bar protection 2 differential relay 4.42 Days
Continuous		  
24-Feb-25 07:00 06-Mar-25 17:00 ALTALINK TE 895s Protection & Control (895s Suffield) remove 96/752 (895s100) relay from service to test trip associated breakers 10.42 Days
Daily		  
24-Feb-25 07:00 28-Feb-25 17:00 EPCOR Outage T1 (EP Riverview), RW2401 (EP Riverview), RW2405 (EP Riverview), RWAB1 (EP Riverview) riverview: TX1 zone relay maintenance and temp gauge calibration 4.42 Days
Continuous		  
24-Feb-25 07:00 03-Mar-25 19:00 ATCO RB 9L20 (755s Cordel - 766s Nevis) facilitate various construction activities on CETO 7.5 Days
Continuous		  
24-Feb-25 07:00 21-Mar-25 17:00 EPCOR TE 72RV6 (EP 511s Victoria - Rossdale) RV6 - protection blocking, MPLS cutovers 25.38 Days
Continuous		  
24-Feb-25 07:00 27-Feb-25 17:00 ALTALINK TE 945s RTU/SCADA (945s Sunshine Village) RTU configuration for subnet and IP address update to all IEDs of this station 3.42 Days
Daily		  
24-Feb-25 07:00 27-Feb-25 17:00 ALTALINK TE 945s Protection & Control (945s Sunshine Village) protection outage to update IP address for sublan upgrade project. 3.42 Days
Daily		  
24-Feb-25 07:00 04-Apr-25 17:00 EPCOR TE Protection & Control (EPCOR Riverview) protection blocking, P&C maintenance. 39.38 Days
Continuous		  
24-Feb-25 07:15 28-Feb-25 17:45 ALTALINK Outage 234L (310p Sundance - 505L tap), 234L1 (234L tap), 505L (234L tap - 505L tap), 505L1 (505L-521L tap), 310p 693 (310p Sundance) component replacement 234L str 13-99 4.44 Days
Continuous		  
24-Feb-25 08:00 02-Mar-25 17:00 ALTALINK RB 610L (83s Taber - 336s Fincastle) setting structures adjacent to existing 610L (str 1-102) (proximity) for VATD project 6.38 Days
Daily		  
24-Feb-25 08:00 28-Feb-25 16:00 ENMAX TE 23.80L (74s Janet - SS-23) relay testing 4.33 Days
Continuous		  
24-Feb-25 08:00 27-Feb-25 20:00 SUNCOR TE 29EDD-34 29PT-340 (29EDD-34), 29EDD-34 29PT-341 (29EDD-34) complete annual CIP Relay password changes & power cycle 3.5 Days
Continuous		  
24-Feb-25 08:00 15-Mar-25 16:00 ALTALINK, EPCOR RB 1203L (320p Keephills - 510s Sunnybrook) expose tower foundations to complete repair to corrosion damage by installation of stiffeners 19.29 Days
Continuous		  
24-Feb-25 09:00 28-Feb-25 17:00 BCH Outage 5L51 (BPA Custer - BCH Ingledow) ING 5CB3 Insp and doble 4.33 Days
Continuous		 AB-BC
24-Feb-25 09:00 28-Feb-25 17:00 ATCO RB 890s 701 (890s Melito) voltage reg bank addition - to perform hot line work just downstream of the substation 890S Melito 4.33 Days
Continuous		  
24-Feb-25 09:30 28-Feb-25 17:30 ATCO TE 946s Protection & Control (946s Oakland) relay testing 4.33 Days
Continuous		  
24-Feb-25 09:30 28-Feb-25 17:30 ATCO TE 757s Protection & Control (757s Battle River) relay testing- isolate relays as required on site. 4.33 Days
Continuous		  
24-Feb-25 10:00 27-Feb-25 16:00 ATCO TE 700s Protection & Control (700s Bonnyville) relay testing 3.25 Days
Continuous		  
24-Feb-25 10:00 27-Feb-25 17:30 ATCO TE 810s Protection & Control (810s Dome Cutbank) relay testing 3.31 Days
Continuous		  
24-Feb-25 10:00 28-Feb-25 16:30 ATCO, ALTALINK RB 7L129 (526s Buffalo Creek - 7LA129 tap), 7L129 (710s Vermilion - 7LA129 tap) replace structures and cross arms on 7L129 , live line work 4.27 Days
Continuous		  
24-Feb-25 10:00 28-Feb-25 16:30 ATCO, ALTALINK RB 7L129 (526s Buffalo Creek - 7LA129 tap) replace structures and cross arms on 7L129 , live line work 4.27 Days
Daily		  
24-Feb-25 10:00 27-Feb-25 17:00 ALTALINK TE 77s Protection & Control (77s Sagitawah) standard relay maintenance 3.29 Days
Daily		  
24-Feb-25 10:00 27-Feb-25 17:00 ALTALINK TE 89s Protection & Control (89s Ellerslie) relay maintenance 3.29 Days
Daily		  
24-Feb-25 12:00 03-Mar-25 12:00 ATCO TE 800s Protection & Control (800s Friedenstal), 800s RTU/SCADA (800s Friedenstal) change settings on the 25 kV bus relay [51-51N-81], remove 25 kV bus relay PT inputs, tie in 503 backup protection, re-Wire 500PT1 (new cable), change settings on 712BF & Add Trip to 503 7 Days
Continuous		  
25-Feb-25 07:00 28-Feb-25 17:30 ALTALINK Outage 430s 652 (430s Ursus) urgent repair - replacement of leaking CT(A-phase) 3.44 Days
Continuous		  
25-Feb-25 08:30 12-Mar-25 17:30 ATCO TE 730s Protection & Control (730s Rycroft) 50BF/701TCS requires blocking for settings update and testing associated with the 701T transformer protection upgrade 15.33 Days
Continuous		  
25-Feb-25 08:30 12-Mar-25 17:30 ATCO TE 730s Protection & Control (730s Rycroft) replace 701T with new protection panel 7T1. 15.33 Days
Continuous		  
26-Feb-25 06:00 27-Feb-25 18:00 ALTALINK Outage 895s T3 (895s Suffield), 895s 952 (895s Suffield) test new 'B' bus protection and 752 BF relays 1.5 Days
Continuous		  
26-Feb-25 07:15 03-Mar-25 17:45 ALTALINK Outage 890L (58s Edson - 207s Pinedale), 58s 890 (58s Edson), 207s 890 (207s Pinedale) system upgrade on structures 5.44 Days
Continuous		  
26-Feb-25 08:00 17-Mar-25 16:00 Syncrude Outage 1735 (Syncrude Mildred Lake), Mildred T17 (Syncrude Mildred Lake) replace leaking pothead 19.29 Days
Continuous		  
26-Feb-25 08:00 27-Feb-25 16:00 Syncrude Outage 1435 (Syncrude Mildred Lake), Mildred T14 (Syncrude Mildred Lake) urgent maintenance 1.33 Days
Continuous		  
26-Feb-25 09:00 27-Feb-25 16:00 ATCO TE 729s Protection & Control (729s Otauwau) PRC005 relay testing 31 Hours
Continuous		  
26-Feb-25 09:00 08-Mar-25 17:00 ATCO RB 7L65 (709s Vegreville - 7LA65 tap), 7L65 (710s Vermilion - 7LA65 tap) stinging parallel along existing 7L65 for the new 7L65 phase three project 10.33 Days
Continuous		  
26-Feb-25 10:00 27-Feb-25 17:00 ATCO, SUNCOR Outage 9L162 (29EDD-94 Voyageur - 951s Thickwood Hills), 29EDD-94 29PS-643 (29EDD-94 Voyageur) weld new guy wire vangs and re-anchor structure 9L162/44 31 Hours
Continuous		  
26-Feb-25 10:00 27-Feb-25 17:00 ATCO TE 970s Protection & Control (970s Bourque), 970s RTU/SCADA (970s Bourque) RTU configuration update to enable SOC/HMI alarms for 7L574 in alternate settings 31 Hours
Continuous		  
26-Feb-25 10:00 27-Feb-25 16:00 ATCO TE 743s Protection & Control (743s Sarah Lake) relay testing 30 Hours
Continuous		  
26-Feb-25 11:00 28-Feb-25 16:00 ATCO TE 907s RTU/SCADA (907s Waddell) feeder settings updates due to large D project
 2.21 Days
Continuous		  
27-Feb-25 07:00 27-Feb-25 17:00 EPCOR TE 987s RTU/SCADA (987s Clover Bar) RTU communications outage for firmware upgrades 10 Hours
Continuous		  
27-Feb-25 07:30 27-Feb-25 18:00 ATCO TE 2075s RTU/SCADA (2075s Newell), 2029s RTU/SCADA (2029s Heathfield) Newell/Heathfield - patching 10.5 Hours
Continuous		  
27-Feb-25 07:30 27-Feb-25 18:00 ATCO TE 939s RTU/SCADA (939s Livock), 951s RTU/SCADA (951s Thickwood Hills) Livock/Thickwood - patching 10.5 Hours
Continuous		  
27-Feb-25 07:30 27-Feb-25 18:00 ATCO, CNRL TE 838s RTU/SCADA (838s Horizon Mining) Horizon - patching 10.5 Hours
Continuous		  
27-Feb-25 08:00 27-Feb-25 18:00 ATCO TE ATCO Telecom Equipment, APS# 158 Ksituan 754S Voltage Stability Mitigation Clairmont Lake telecom
 10 Hours
Continuous		  
27-Feb-25 08:00 28-Feb-25 17:00 ALTALINK Outage 58s 890 (58s Edson) CT ratio change and relay settings change 1.38 Days
Continuous		  
27-Feb-25 08:00 27-Feb-25 17:00 ALTALINK TE 212s Protection & Control (212s Lacombe) PRC protection maintenance 9 Hours
Daily		  
27-Feb-25 08:00 27-Feb-25 17:00 ALTALINK TE 199s RTU/SCADA (199s East Airdrie) troubleshooting remote connection to 688L 'A' protection relay 9 Hours
Daily		  
27-Feb-25 08:00 27-Feb-25 17:00 ALTALINK TE 199s Protection & Control (199s East Airdrie) removing A21/79/L2 from service to troubleshoot issue with disturbance analysis being able to remote into the relay 9 Hours
Daily		  
27-Feb-25 09:30 27-Feb-25 17:30 ATCO Outage 946s 908 (946s Oakland) trip coil testing 8 Hours
Continuous		  
27-Feb-25 11:30 27-Feb-25 15:30 ALTALINK Outage 700L (746s Sherwood Park - 746L tap), 746s 700N (746s Sherwood Park) cutover CT connection to new B87/138B 4 Hours
Daily		  
27-Feb-25 12:00 27-Feb-25 16:00 ATCO Outage 7L146 (700s Bonnyville - 970s Bourque), 700s 704 (700s Bonnyville), 970s 7L146D2 (970s Bourque) trip coil testing 4 Hours
Continuous		  
27-Feb-25 12:00 27-Feb-25 13:00 CENOVUS TE 1200s RTU/SCADA (1200s Foster Creek Station) software upgrade 60 Mins
Continuous		  
27-Feb-25 17:00 11-Mar-25 17:00 ATCO Outage 6L02 (769s Stettler - 873s Marion Lake), 769s 601 (769s Stettler) commission 6L02 relays, end-to-end testing 11.96 Days
Continuous		  
28-Feb-25 07:00 28-Feb-25 17:00 EPCOR TE RTU/SCADA (Garneau) RTU communications outage for firmware upgrades 10 Hours
Continuous		  
28-Feb-25 09:00 28-Mar-25 16:00 ALTALINK TE 344s Protection & Control (344s Warner) protection changes to prevent future mis-operation, outages on A87/50/51/51NN/T1, B87/50/51/51NN/T1 28.25 Days
Daily		  
28-Feb-25 10:00 01-Mar-25 17:00 ATCO, SUNCOR Outage 9L193 (29EDD-94 Voyageur - 951s Thickwood Hills) weld new guy wire vangs and re-anchor structure 9L193/44 31 Hours
Continuous		  
28-Feb-25 19:00 07-Mar-25 19:00 ALTALINK Outage 320p 2089 (320p Keephills) repair work 7 Days
Continuous		  
02-Mar-25 08:00 06-Mar-25 14:00 ENMAX Outage 32.83L (SS-32 - SS-40), 40.1TR (SS-40), 32B138-32.83 (SS-32), 40B138-32.83 (SS-40), 40MD138-40.1TR (SS-40) grounding improvements 4.25 Days
Continuous		  
03-Mar-25 07:00 03-Mar-25 17:30 ALTALINK Outage 666L (28s West Brooks - 498s Tilley), 28s 60 (28s West Brooks), 28s 81 (28s West Brooks), 28s 666 (28s West Brooks), 498s 666 (498s Tilley) cutover and test LTO circuits at 28s and 498s install maintenance switch 10.5 Hours
Daily		  
03-Mar-25 07:00 07-Mar-25 17:00 EPCOR Outage 816s P2401 (816s Petrolia) gauge/valve repair 4.42 Days
Continuous		  
03-Mar-25 07:00 05-Mar-25 17:00 EPCOR Outage T3 (Meadowlark), M723 (Meadowlark), M724 (Meadowlark), MAB3 (Meadowlark) meadowlark: TX3 zone relay maintenance and apparatus counter repair 2.42 Days
Continuous		  
03-Mar-25 07:00 07-Mar-25 17:00 EPCOR Outage 1098L (EP 805s Jasper - Poundmaker), EP 805s J2401 (EP 805s Jasper), EP 805s J2407 (EP 805s Jasper), PM2401 (Poundmaker), PM2402 (Poundmaker) relay maintenance 4.42 Days
Continuous		  
03-Mar-25 07:00 29-Mar-25 17:00 ALTALINK, EPCOR RB 1044L (EP 805s Jasper - 816s Petrolia) detailed aerial patrol, shield wire bonding repair and contractor working in vicinity 26.38 Days
Continuous		  
03-Mar-25 07:00 29-Mar-25 17:00 ALTALINK, EPCOR RB 1045L (EP 805s Jasper - 1045AL tap) detailed aerial patrol, shield wire bonding repair and contractor working in vicinity 26.38 Days
Continuous		  
03-Mar-25 07:00 14-Mar-25 17:00 ALTALINK, EPCOR RB 1045AL (320p Keephills - 1045L tap), 1045L (310p Sundance - 1045AL tap), 1045L (EP 805s Jasper - 1045AL tap) perform detailed aerial patrol and shield wire bonding repair 11.38 Days
Continuous		  
03-Mar-25 07:00 06-Mar-25 17:30 ALTALINK RB 508L (67s Stirling - 344s Warner) replacing arms and insulation (str 289,290) - live line work 3.44 Days
Daily		  
03-Mar-25 07:30 03-Mar-25 17:30 ALTALINK RB 700L (422s Westwood - 746L tap), 700L (746s Sherwood Park - 746L tap) prep work for upcoming GOI to rebuild structure 22-37 10 Hours
Daily		  
03-Mar-25 08:00 09-Mar-25 17:00 ALTALINK RB 610L (83s Taber - 336s Fincastle) setting structures adjacent to existing 610L (str 1-102) 6.33 Days
Daily		  
03-Mar-25 08:00 21-Mar-25 17:00 ALTALINK TE 746s RTU/SCADA (746s Sherwood Park) configuration updates to implement protections and cutover controls 18.33 Days
Daily		  
03-Mar-25 08:00 09-Mar-25 16:00 ENMAX Outage 162.2TR (SS-162), 138kV South Bus (SS-162), 240kV South Bus (SS-162) HV SW Maint. 162SW88, 162SW89, 162SW105, 162SW136, 162SW146, MD138-162.2TR, MD240-162.2TR. Oil Sampling MT, TC. Check reversing switch. 162.2TR H1 GE tap sensor replacement MS 3000 6.29 Days
Continuous		  
03-Mar-25 08:00 07-Mar-25 17:00 ALTALINK TE 419s Protection & Control (419s Chestermere) settings and functional scheme changes 4.38 Days
Daily		  
03-Mar-25 08:00 07-Mar-25 17:00 ALTALINK TE 419s RTU/SCADA (419s Chestermere) update RTU with new alarms 4.38 Days
Daily		  
03-Mar-25 08:00 04-Mar-25 20:00 SUNCOR TE 29EDD-94 406T (29EDD-94 Voyageur), 29EDD-94 407T (29EDD-94 Voyageur), 29EDD-94 29PP-97 260kV Bus (29EDD-94 Voyageur), 29EDD-94 29PP-98 260kV Bus (29EDD-94 Voyageur), 29PL9-17 (29EDD-1 Millennium - 29EDD-94 Voyageur), 29PL9-16 (29EDD-1 Millennium - 29EDD-94 Voyageur) complete annual CIP relay password changes and power cycle 1.5 Days
Continuous		  
03-Mar-25 08:00 04-Mar-25 16:00 ENMAX TE RTU/SCADA (SS-28) SCADA RTU test 1.33 Days
Daily		  
03-Mar-25 08:00 07-Mar-25 16:00 ENMAX TE 3.82L (SS-3 - SS-8) relays end to end test 4.33 Days
Continuous		  
03-Mar-25 08:00 03-Mar-25 16:00 ENMAX TE RTU/SCADA (SS-15) SDN upgrade 8 Hours
Continuous		  
03-Mar-25 08:00 07-Mar-25 16:00 ENMAX TE Protection & Control (SS-32) 32.2TR slip over CT installation 4.33 Days
Continuous		  
03-Mar-25 08:30 07-Mar-25 15:30 ALTALINK, DOW Outage 899L (166s Dow Chemical Fort Saskatchewan - 218s Fort Saskatchewan Co-Gen), 166s 899N (166s Dow Chemical Fort Saskatchewan) urgent replacement of 138 kV Koncar CTs associated with 166s 899N 4.29 Days
Continuous		  
03-Mar-25 09:00 10-Mar-25 17:00 ATCO Outage 7L23 (796s Nipisi - 7L23 tap), 7L23 (732s Mitsue - 7L23 tap), 796s 702 (796s Nipisi), 858S 701TD (858s Narrows Creek) complete CAR cross arm replacements & TCM wood pole replacements 7.29 Days
Continuous		  
03-Mar-25 09:00 20-Mar-25 14:00 ALTALINK Outage 746s T2 (746s Sherwood Park) replace T2, 51L, 222L, & 2239L protections, add ground controls, upgrade 746s35 control module, replace 746s20 and 746s50 17.17 Days
Continuous		  
03-Mar-25 09:30 07-Mar-25 17:30 ATCO TE 946s Protection & Control (946s Oakland) relay testing 4.33 Days
Continuous		  
03-Mar-25 09:30 03-Mar-25 17:30 ATCO Outage 946s 902 (946s Oakland) trip coil testing 8 Hours
Continuous		  
03-Mar-25 09:30 03-Mar-25 17:30 ATCO Outage 734s 701T (734s Sturgeon), 734s 701 (734s Sturgeon) 734s 701 heater repairs 8 Hours
Continuous		  
03-Mar-25 10:00 07-Mar-25 16:30 ATCO, ALTALINK Outage 7L129 (526s Buffalo Creek - 7LA129 tap) Replace structures, cross arms and insulators on 7L129 4.27 Days
Continuous		  
03-Mar-25 10:00 03-Mar-25 15:00 ATCO RB 7L90 (813s Little Smoky - 7LA90 tap), 7L90 (741s ATC Fox Creek - 7LA90 tap) tap down mobile Sub 902S from 7L90 for 741S Fox Creek substation rebuild 5 Hours
Continuous		  
03-Mar-25 10:00 03-Mar-25 17:30 ATCO IO 741s 705C (741s Fox Creek) 705C protection requires bus voltage to verify closing on zero crossing 7.5 Hours
Continuous		  
03-Mar-25 10:00 07-Mar-25 16:30 ATCO, ALTALINK Outage 7L129 (526s Buffalo Creek - 7LA129 tap) Replace structures, cross arms and insulators on 7L129 4.27 Days
Continuous		  
03-Mar-25 10:00 07-Mar-25 16:00 ATCO Outage 700s 705C (700s Bonnyville), 700s 705 (700s Bonnyville) prc-005 relay & trip coil testing, rtxp test switch replacement 4.25 Days
Continuous		  
03-Mar-25 10:00 06-Mar-25 16:00 ATCO TE 956s Protection & Control (956s Watt Lake) protection relay testing on 51-51N/702T 3.25 Days
Continuous		  
03-Mar-25 10:00 05-Mar-25 17:00 ALTALINK TE 77s Protection & Control (77s Sagitawah) standard relay maintenance 2.29 Days
Daily		  
03-Mar-25 11:00 06-Mar-25 17:00 ALTALINK TE 157s Protection & Control (157s Lac La Biche) standard relay maintenance 3.25 Days
Daily		  
03-Mar-25 12:00 05-Mar-25 16:00 ATCO TE 951s Protection & Control (951s Thickwood Hills), 951s RTU/SCADA (951s Thickwood Hills) updates to the 240 kV transformer protection relays for both 901T & 902T 2.17 Days
Continuous		  
03-Mar-25 12:00 04-Mar-25 16:00 ATCO TE 718s Protection & Control (718s Parsons Creek) PRC relay testing 28 Hours
Continuous		  
03-Mar-25 12:00 21-Mar-25 16:00 ATCO TE 939s Protection & Control (939s Livock) PRC relay testing on 7L125, 901T, 903T, 9L10 and 9L57 18.13 Days
Continuous		  
03-Mar-25 12:01 31-Mar-25 12:00 ATCO Outage 741s 701T (741s Fox Creek), 741s 703 (741s ATC Fox Creek) substation upgrade project. 27.96 Days
Continuous		  
03-Mar-25 12:01 12-Mar-25 17:00 ATCO Outage 7L56 (725s Goose River - 738s Virginia Hills) replacing cross arms and poles 9.17 Days
Continuous		  
03-Mar-25 14:00 06-Mar-25 12:00 ATCO TE 832s Protection & Control (832s Blumenort) ITM/ETM wiring and settings updates to 701T protection 2.92 Days
Continuous		  
04-Mar-25 07:00 05-Mar-25 18:00 ALTALINK Outage 892L (244s Bowmanton - 895s Suffield) Cutover, test LTO, CT circuits at 244s and 895s to new RAS209 relays. Trip test 895s892 from new ‘B’ Bus protection and Breaker Fail relay. New maintenance switch being installed for breaker 244s2952 and 244s3052. 1.46 Days
Continuous		  
04-Mar-25 07:00 06-Mar-25 17:00 ALTALINK TE 895s Protection & Control (895s Suffield) PRC maintenance 2.42 Days
Continuous		  
04-Mar-25 07:00 05-Mar-25 16:00 ALTALINK Outage 646L (237s Foothills - 678s Okotoks), 237s 552 (237s Foothills), 237s 652 (237s Foothills), 237s 646 (237s Foothills), 678s 646 (678s Okotoks) urgent replacement of C phase PT 237s14 1.38 Days
Continuous		  
04-Mar-25 07:00 09-Mar-25 19:00 ATCO RB 9L20 (755s Cordel - 766s Nevis) facilitate various construction activities on CETO 5.46 Days
Continuous		  
04-Mar-25 07:00 28-Mar-25 18:00 ATCO TE 800s RTU/SCADA (800s Friedenstal) additional PLC and new SCADA RTU changes 24.42 Days
Continuous		  
04-Mar-25 07:15 13-Mar-25 17:45 ALTALINK Outage 700L (422s Westwood - 746L tap), 700L (746s Sherwood Park - 746L tap) rebuild structure 22-37 9.4 Days
Continuous		  
04-Mar-25 07:30 04-Mar-25 18:30 ALTALINK Outage 283s C1 (283s Violet Grove), 283s T1 (283s Violet Grove), 283s 138kV Bus (283s Violet Grove), 836L (61s Lodgepole - 283s Violet Grove), 673L (131s Moon Lake - 283s Violet Grove), 283s 30 (283s Violet Grove), 283s 31 (283s Violet Grove), 283s 836 (283s Violet Grove), 283s 673 (283s Violet Grove), 131s 673 (131s Moon Lake), 61s 836N (61s Lodgepole) replace leaking capacitor and 283s30 maintenance 11 Hours
Daily		  
04-Mar-25 08:00 14-Mar-25 16:00 ENMAX, ALTALINK Outage 20.82L (SS-20 - SS-21), 21.80L (42s Sarcee - SS-21), 21.1TR (SS-21), 21.4TR (SS-21), 21B69-21.4TR (SS-21), 21MD138-21.1TR (SS-21), 21B138-20.82 (SS-21), 21B138-21.80 (SS-21), 21MD138-21.4TR (SS-21), 42s 21 (42s Sarcee), 20B138-20.82 (SS-20) HV switch replacement 10.29 Days
Continuous		  
04-Mar-25 08:00 14-Mar-25 16:00 ENMAX, ALTALINK IO 21.80L (42s Sarcee - SS-21) HV switch replacement 10.29 Days
Continuous		  
04-Mar-25 08:00 07-Mar-25 17:00 ALTALINK Outage 744L (228s T.M.P.L. Niton - 744AL tap) Frame and replace structures 124 & 126. 3.38 Days
Continuous		  
04-Mar-25 08:00 06-Mar-25 16:00 ALTALINK TE 336s Protection & Control (336s Fincastle) RAS 180 cutover communication to B MPLS node 2.33 Days
Daily		  
04-Mar-25 08:00 06-Mar-25 16:00 ALTALINK TE 244s Protection & Control (244s Bowmanton) RAS 180 cutover communication to B MPLS node 2.33 Days
Daily		  
04-Mar-25 08:00 06-Mar-25 16:00 ALTALINK, BHE TE 719s Protection & Control (719s Rattlesnake Ridge) RAS 180 cutover communication to B MPLS node 2.33 Days
Daily		  
04-Mar-25 08:00 04-Mar-25 18:00 ALTALINK TE 283s Protection & Control (283s Violet Grove) maintenance on protections 10 Hours
Daily		  
04-Mar-25 08:00 12-Mar-25 16:00 ATCO TE 730s Protection & Control (730s Rycroft) block 21A/7L73 relay for new transformer protection upgrade 8.29 Days
Continuous		  
04-Mar-25 08:00 05-Mar-25 17:00 ALTALINK TE 103s Protection & Control (103s Goose Lake) relay maintenance 1.38 Days
Daily		  
04-Mar-25 08:30 04-Mar-25 17:30 ALTALINK Outage 332s C1 (332s Ellis) 138 kV breaker maintenance 9 Hours
Daily		  
04-Mar-25 09:00 04-Mar-25 17:00 BCH, ALTALINK Outage 1L275 (799s Coleman - BCH Natal), 1CB2 (BCH Natal) NTL 1CB2 Ras testing 8 Hours
Continuous		 AB-BC
04-Mar-25 09:00 04-Mar-25 15:00 ATCO TE ATCO Telecom Equipment Telecom OPGW Splice enclosure Repair on Structure 128 North of Sedalia Sub. Full Outage to OPGW Telecom Fiber Carrier and Circuits 6 Hours
Continuous		  
04-Mar-25 09:00 06-Mar-25 16:00 ATCO TE 826s Protection & Control (826s Marguerite Lake) repair leak on 901T DGA device 2.29 Days
Continuous		  
04-Mar-25 09:00 04-Mar-25 17:00 ALTALINK TE 304s RTU/SCADA (304s Shell Limestone) factory reset on LAN-ES1 and replace HMI 8 Hours
Daily		  
04-Mar-25 09:30 04-Mar-25 17:30 ATCO Outage 946s 903 (946s Oakland), 946s 903B (946s Oakland) trip coil testing 8 Hours
Continuous		  
04-Mar-25 10:00 04-Mar-25 18:00 BCH Outage 2L113 (BCH Cranbrook - BCH Natal) Placeholder NTL 2D21 & 2L113 OOS for 2D21 control cutover and testing. For Natal Substation rebuild project. BC maintenance does not affect the Alberta ATC 8 Hours
Continuous		 AB-BC
04-Mar-25 10:00 14-Mar-25 16:00 ATCO TE 939s RTU/SCADA (939s Livock) install new BMS 10.21 Days
Continuous		  
05-Mar-25 08:00 05-Mar-25 16:00 ALTALINK Outage 126L1 (6L126 tap) Install MOD on 126L1, test operate, adjust switch as necessary. 8 Hours
Daily		  
05-Mar-25 08:00 05-Mar-25 18:00 ATCO TE ATCO Telecom Equipment, 740s RTU/SCADA (740s H.R.Milner), 810s RTU/SCADA (810s Dome Cutbank) Smokey River Telecom. Work on Battery Banks. 10 Hours
Continuous		  
05-Mar-25 08:00 05-Mar-25 18:00 Syncrude TE Syncrude ICCP Outage SCL (Jing) - SCADA - Server Update
Whole Syncrude Visibility loss		 10 Hours
Daily		  
05-Mar-25 08:00 05-Mar-25 15:00 ATCO Outage 6L126 (743s Sarah Lake - 515L tap) AltaLink Work: Install MOD on 126L1, test operate, adjust switch as necessary. 7 Hours
Continuous		  
05-Mar-25 08:00 05-Mar-25 16:00 ENMAX TE RTU/SCADA (SS-15) SCADA RTU Test - RTU-15. SCADA Alarm Test - RTU-15 ANN 8 Hours
Continuous		  
05-Mar-25 08:00 05-Mar-25 17:00 ALTALINK TE 358s Protection & Control (358s Amoco Brazeau) Standard relay maintenance, cap protection is redundant. Meter Reseal on the following 358S 287L and 358S 5955T Temporary loss of analogs on the listed meters while being replaced . 9 Hours
Daily		  
05-Mar-25 08:00 05-Mar-25 17:00 ALTALINK TE 542s Protection & Control (542s Ervick) standard relay maintenance, redundant protection in place at all times 9 Hours
Daily		  
05-Mar-25 08:30 05-Mar-25 17:30 ALTALINK Outage 216s 29 (216s Knightsbridge) First trip & breaker maintenance 9 Hours
Daily		  
05-Mar-25 08:30 05-Mar-25 17:30 ALTALINK Outage 331s 422 (331s Ponoka), 422L (288s Wolf Creek - 331s Ponoka) Replace failing tank heaters 9 Hours
Daily		  
05-Mar-25 09:00 05-Mar-25 17:00 ALTALINK IO 887L (48s Pocaterra - 978s BCH Britt Creek) NTL 1CB1 Ras testing 8 Hours
Continuous		  
05-Mar-25 09:00 05-Mar-25 17:00 ALTALINK, BCH Outage 1L274 (BCH Natal - BCH Line Creek tap), 1CB1 (BCH Natal) NTL 1CB1 Ras testing 8 Hours
Continuous		 AB-BC
05-Mar-25 09:00 07-Mar-25 16:00 ATCO TE 718s Protection & Control (718s Parsons Creek) PRC Relay testing.
Redundant protection in service at all times.		 2.29 Days
Continuous		  
05-Mar-25 09:00 06-Mar-25 18:00 Saskpower Outage SASK POWER P2C maintenance 1.38 Days
Continuous		 AB-SK
05-Mar-25 09:00 05-Mar-25 17:00 ATCO TE ATCO Telecom Equipment, 957s RTU/SCADA (957s McClelland) Loss of visibility and control for 90min during this work. 8 Hours
Continuous		  
05-Mar-25 09:30 05-Mar-25 17:30 ATCO Outage 946s 905 (946s Oakland) trip coil testing 8 Hours
Continuous		  
06-Mar-25 07:00 06-Mar-25 18:00 ALTALINK Outage 100L (498s Tilley - 895s Suffield), 498s 100X (498s Tilley), 895s 100 (895s Suffield) replace bus protection CT circuit 11 Hours
Daily		  
06-Mar-25 07:00 06-Mar-25 17:00 ALTALINK TE 895s Protection & Control (895s Suffield) update T3 A protection settings 10 Hours
Daily		  
06-Mar-25 07:00 15-Mar-25 18:00 ALTALINK TE 347s Protection & Control (347s Fox Creek) disable trips on 77/85/L2 9.42 Days
Continuous		  
06-Mar-25 08:00 06-Mar-25 16:00 ALTALINK Outage 45s Bretona, 874L (45s Bretona - 522s Cooking Lake), 897L (38s East Edmonton - 45s Bretona), 45s T1 (45s Bretona), 45s 138kV Bus (45s Bretona), 45s 897 (45s Bretona), 45s 874 (45s Bretona), 45s 9 (45s Bretona), 522s 874 (522s Cooking Lake), 38s 897 (38s East Edmonton) replace 45s16 failing cooper cutout, replace 45s874 tank heaters, replace 45s14 vt fuse 8 Hours
Daily		  
06-Mar-25 08:00 06-Mar-25 16:00 ENMAX TE RTU/SCADA (SS-27) SCADA RTU test - RTU-27, SCADA alarm test 8 Hours
Continuous		  
06-Mar-25 08:00 06-Mar-25 17:00 ALTALINK TE 54s RTU/SCADA (54s Fort Saskatchewan) RTU database update 9 Hours
Daily		  
06-Mar-25 08:00 06-Mar-25 17:00 ALTALINK TE 178s Protection & Control (178s Cynthia) standard relay maintenance 9 Hours
Daily		  
06-Mar-25 08:00 06-Mar-25 17:00 ALTALINK TE 212s Protection & Control (212s Lacombe) PRC maintenance 9 Hours
Daily		  
06-Mar-25 08:30 06-Mar-25 11:30 ALTALINK Outage 185L (379s Shell Canada Waterton - 396s Pincher Creek), 396s 185 (396s Pincher Creek), 379s 185N (379s Shell Canada Waterton) techs to remove pistol handle from breaker control module switch due to reliability hazard 3 Hours
Daily		  
06-Mar-25 08:30 06-Mar-25 12:30 ALTALINK Outage 865L (38s East Edmonton - 216s Knightsbridge), 216s 865X (216s Knightsbridge), 38s 865N (38s East Edmonton) first trip & breaker maintenance 4 Hours
Daily		  
06-Mar-25 09:30 06-Mar-25 17:30 ATCO Outage 946s 909 (946s Oakland) Trip coil testing 8 Hours
Continuous		  
06-Mar-25 12:30 06-Mar-25 17:30 ALTALINK Outage 705L (184s Petro-Canada Edmonton - 216s Knightsbridge), 216s 32 (216s Knightsbridge), 184s 705W (184s Petro-Canada Edmonton) first trip & breaker maintenance 5 Hours
Daily		  
07-Mar-25 09:00 07-Mar-25 16:00 ATCO RB 7L46 (813s Little Smoky - 845s Big Mountain) High load move at structure 7L46-23 7 Hours
Continuous		  
07-Mar-25 09:00 07-Mar-25 16:00 ATCO RB 7L228 (845s Big Mountain - 7L20 tap) Lift will be needed @ structure 774 to accommodate the height of the load. 7 Hours
Continuous		  
07-Mar-25 10:00 07-Mar-25 17:00 ATCO TE ATCO Telecom Equipment, 706s RTU/SCADA (706s Irish Creek) Elk Point Telecom
maintenance		 7 Hours
Continuous		  

Prepared On:   2025-02-26   16:35:31

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