Alberta Electric System Operator
System Co-ordination Plan
2025-11-01 to 2025-11-07
Approved Outages

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From To Owner Type Element Scheduled Activity Date/Time Comments Interconnection
26-Jul-24 10:00 31-Jul-26 16:00 ATCO Outage 826s 504R (826s Marguerite Lake) emergency removal to replace failed 502R @834S 735.25 Days
Continuous		  
23-Aug-24 13:45 30-Jun-26 14:29 ALTALINK Outage 157s C1 (157s Lac La Biche) forced outage 676.03 Days
Continuous		  
11-Mar-25 00:00 31-Dec-25 16:00 ALTALINK Outage 377s 473C (377s AML Hardisty) forced outage 295.71 Days
Continuous		  
18-Mar-25 14:00 17-Mar-26 17:30 ALTALINK Outage 217s C1 (217s North Red Deer) cap. bank unavailable and cannot be energized due to Koncar CTs being present 364.15 Days
Daily		  
20-Mar-25 08:00 20-Mar-26 17:00 ALTALINK Outage 256s C1 (256s Harmattan) forced outage 365.38 Days
Continuous		  
31-Mar-25 07:00 19-Dec-25 17:00 EPCOR TE Protection & Control (Woodcroft) Woodcroft: protection blocking for merging unit and protection upgrade. 263.46 Days
Continuous		  
14-May-25 08:00 10-Feb-26 16:00 ENMAX TE Protection & Control (SS-32) 32sub 138kV autoswitching protection outage 272.38 Days
Continuous		  
08-Jun-25 15:00 25-Nov-25 15:30 ALTALINK Outage 397s 864W (397s Benbow) new 864L line construction, new 397s48 (VT6) install 170.06 Days
Continuous		  
13-Jun-25 17:00 11-Feb-26 17:00 EPCOR Outage T3 (Rossdale) Rossdale - TX3 LCR 243.04 Days
Continuous		  
16-Jul-25 07:00 01-Dec-25 23:55 NWE Outage 2366 (NWE Marias) install new equipment at Marias 138.75 Days
Continuous		 AB-MATL
21-Jul-25 09:00 19-Jan-26 17:00 ATCO TE 732s Protection & Control (732s Mitsue) the breaker fail protection will be disabled during the project, as we migrate from the existing to the new protection 182.38 Days
Continuous		  
21-Jul-25 09:00 23-Jan-26 16:30 ATCO TE 732s RTU/SCADA (732s Mitsue) existing RTU system being replaced with new SMP system 186.35 Days
Continuous		  
22-Jul-25 08:30 31-Dec-25 16:30 ALTALINK Outage 263s C1 (263s Strachan) forced outage 162.38 Days
Continuous		  
25-Jul-25 17:01 20-Feb-26 17:00 EPCOR Outage T2 (EP Riverview) bushing test failure (found during OE110184) 210.04 Days
Continuous		  
02-Aug-25 23:30 07-Nov-25 18:00 ATCO Outage 827s SVC (827s Cranberry Lake) forced outage 96.81 Days
Continuous		  
18-Aug-25 07:00 21-Nov-25 17:00 EPCOR TE 805s Protection & Control (805s Jasper) protection blocking for P&C maintenance 95.46 Days
Continuous		  
20-Aug-25 17:00 17-Dec-25 17:00 ALTALINK Outage 1075L (28s West Brooks - 132s Ware Junction) restoration from real time storm 119.04 Days
Continuous		  
25-Aug-25 08:00 03-Apr-26 16:00 ENMAX Outage 32.1TR (SS-32) slip over CT and new power cables installation and P&C works 221.33 Days
Continuous		  
25-Aug-25 09:00 10-Dec-25 17:00 ATCO TE 710s Protection & Control (710s Vermilion) protection and hardwired IO on-site will need to be cut-over to the new SCADA system and tested 107.38 Days
Continuous		  
02-Sep-25 08:00 28-Nov-25 16:00 ENMAX Outage 38.1C (SS-38) capacitor bank switcher replacement 87.38 Days
Continuous		  
05-Sep-25 08:00 24-Nov-25 16:00 ENMAX Outage 1.83L (SS-1 - SS-8) 1 sub Transmission line cut over. Line will terminate at new 1 sub upon return to service. 80.38 Days
Continuous		  
05-Sep-25 08:00 24-Nov-25 16:00 ENMAX Outage 1.85L (SS-1 - SS-8) 1 sub transmission line cut over. line will terminate at new 1 sub upon return to service. 80.38 Days
Continuous		  
12-Sep-25 08:00 06-Mar-26 16:00 ENMAX Outage 33.1TR (SS-33) tap changer refurbishments. soak test required 175.38 Days
Continuous		  
26-Sep-25 07:00 23-Nov-25 11:00 ALTALINK Outage 864L (397s Benbow - 864AL tap), 397s 864W (397s Benbow) 864CL line construction 58.21 Days
Continuous		  
29-Sep-25 08:00 07-Nov-25 16:00 ENMAX Outage 21.2TR (SS-21) 21.2TR replacement 39.38 Days
Continuous		  
06-Oct-25 07:00 06-Nov-25 17:00 ENMAX Outage 1.8TR (SS-1) new 1 sub construction 31.46 Days
Continuous		  
06-Oct-25 10:00 19-Nov-25 16:00 ALTALINK Outage 102s SVC (102s Langdon), 102s T4 (102s Langdon), 102s 252 (102s Langdon), 102s 552 (102s Langdon) the controls change 44.29 Days
Continuous		 AB-BC
14-Oct-25 13:30 04-Nov-25 16:00 ENMAX Outage 8B138-1A0 (SS-8), 8B138-2A0 (SS-8), 1A10 (SS-8), 2A1 (SS-8) 1 sub transmission line cut over, BMR 2a0, and 1.85L protection upgrade related demo and re-connects, commissioning and functions 21.15 Days
Continuous		  
15-Oct-25 12:00 28-Nov-25 17:00 EPCOR Outage 330P 12TC1 (330p Genesee), 330p 805 (330p Genesee) Genesee: 12TC1 emergency bushing investigation 44.25 Days
Continuous		  
16-Oct-25 08:00 24-Nov-25 20:00 SUNCOR Outage 29EDD-61 29PT-653 (29EDD-61 Stony Island), 29EDD-61 30-252-500001 (29EDD-61 Stony Island) 29PT-653 repair / replace burned bonding conductor (9000808061) 39.54 Days
Continuous		  
20-Oct-25 07:00 28-Nov-25 17:00 ALTALINK, EPCOR RB 1044L (EP 805s Jasper - 816s Petrolia) working in proximity (MN872 manhole replacement) 39.46 Days
Continuous		  
20-Oct-25 07:00 14-Nov-25 17:00 EPCOR TE Protection & Control (Rossdale) block A protection for RG1, RG7, RV2 and RV4 25.46 Days
Continuous		  
20-Oct-25 07:00 04-Nov-25 17:00 ALTALINK, CENOVUS TE 539s Protection & Control (539s Sunday Creek) PRC-5 - 5 year maintenance on PCB-9201 & CT-9205 and PCB-9202 & CT-9206 15.46 Days
Daily		  
21-Oct-25 07:00 02-Nov-25 18:00 ALTALINK, ATCO Outage 912L (63s Red Deer - 766s Nevis), 766s 902 (766s Nevis) string overtop 912L STR 147-148 with the new CETO 962L/986L spans 165-166 12.5 Days
Continuous		  
24-Oct-25 20:00 13-Nov-25 20:00 EPCOR Outage 330P GT3 (330p Genesee), 330p 1208 (330p Genesee), 330p 1207 (330p Genesee), 330p 12GT3D (330p Genesee) connection repair 20.04 Days
Continuous		  
26-Oct-25 09:00 02-Nov-25 17:00 ALTALINK IO 887L (48s Pocaterra - 978s BCH Britt Creek) Elk Lakes Beetle Hazard tree removals. 64-08 to 25-01 7.38 Days
Daily		  
27-Oct-25 07:00 13-Nov-25 17:00 ENMAX TE Protection & Control (SS-3) 3 sub 138 kV Z31 bus differential protection outage 17.46 Days
Daily		  
27-Oct-25 07:00 03-Nov-25 07:00 ENMAX Outage 3.3TR (SS-3) 3.3TR transformer protection 'S' protection replacement with 'B' protection 7.04 Days
Continuous		  
27-Oct-25 07:00 03-Nov-25 17:00 ENMAX TE Protection & Control (SS-3) 3 sub BMR82 protection outage 7.46 Days
Daily		  
27-Oct-25 07:00 02-Nov-25 19:00 ATCO RB 9L20 (755s Cordel - 766s Nevis) complete construction activities on CETO project adjacent to 9L20 6.54 Days
Continuous		  
27-Oct-25 07:00 02-Nov-25 16:00 ALTALINK, EPCOR IO 1055L (629s Argyll Transfer Station - 816s Petrolia) ADS2 LCR - Bellamy transducer and DFR cutovers, Bellamy 240 kV SF6 gas tests and leak checks 6.42 Days
Continuous		  
27-Oct-25 07:00 02-Nov-25 19:00 ATCO RB 7L143 (766s Nevis - 769s Stettler) facilitate work adjacent to line for CETO project 6.54 Days
Continuous		  
27-Oct-25 07:00 13-Nov-25 17:00 ENMAX TE Protection & Control (SS-3) 3PT138-Z31 secondary outage 17.46 Days
Daily		  
27-Oct-25 07:30 06-Nov-25 17:30 ALTALINK RB 1097L (356s Milo – 611s Amber) working within proximity on 1036L 10.46 Days
Daily		  
27-Oct-25 07:30 06-Nov-25 17:30 ALTALINK RB 1005AL (991s Little Bow - 1005L tap), 1005L (120s Picture Butte - 1005AL tap), 1005L (356s Milo - 1005AL tap) working within close proximity on 1036L (str 5-45) 10.46 Days
Daily		  
27-Oct-25 08:00 20-Nov-25 16:00 ENMAX Outage 32.83L (SS-32 - SS-40), 32B138-32.83 (SS-32), 40B138-32.83 (SS-40) 32.83L P&C cut over 24.38 Days
Continuous		  
27-Oct-25 08:00 03-Nov-25 17:00 ATCO RB 7L128 (802s Michichi Creek - 7LA128 tap), 7L128 (963s Coyote Lake - 7LA128 tap) hardware tightening on H-frame structures 7.42 Days
Continuous		  
27-Oct-25 09:00 05-Nov-25 17:00 BCH Outage 2L112 (BPA Boundary - BCH Nelway), 2D24 (BCH Nelway), 2D2CB7 (BCH Nelway) NLY 2SA2 2SA12 replacement, BC maintenance does not affect the Alberta ATC 9.38 Days
Continuous		 AB-BC
27-Oct-25 09:00 04-Nov-25 17:00 BCH Outage 5L98 (BCH Nicola - BCH Vaseux Lake) repair damaged conductor and install new mid-span structure in the 102 mile BC maintenance does not affect the Alberta ATC 8.38 Days
Continuous		 AB-BC
27-Oct-25 09:00 02-Nov-25 17:00 BCH Outage 1L274 (48s Pocaterra - 978s BCH Britt Creek) Elk Lakes Beetle hazard tree removals 64-08 to 25-01 BC maintenance does not affect the Alberta ATC 6.38 Days
Daily		 AB-BC
27-Oct-25 12:00 07-Nov-25 16:00 ATCO TE 925s Protection & Control (925s Green Stocking) complete relay testing 11.21 Days
Continuous		  
27-Oct-25 15:00 10-Nov-25 14:00 ATCO Outage 7L49 (729s Otauwau - 732s Mitsue), 732s 702 (732s Mitsue), 732s 703 (732s Mitsue), 729s 705 (729s Otauwau), 732s 7L49D1 (732s Mitsue) protection upgrade, remove old protection, cut over to new protection and cut over equipment status, control and alarms to new station controller 14 Days
Continuous		  
27-Oct-25 19:00 02-Nov-25 16:00 EPCOR, ALTALINK Outage 240BA3 (629s Argyll Transfer Station - 814s Bellamy), 1055L (629s Argyll Transfer Station - 816s Petrolia), 814s B2406 (814s Bellamy), 814s B2407 (814s Bellamy), 814s BDS20 (814s Bellamy) ADS2 LCR - Bellamy transducer and DFR cutovers, Bellamy 240 kV SF6 gas tests and leak checks 5.92 Days
Continuous		  
30-Oct-25 07:00 06-Nov-25 18:00 ATCO, ALTALINK Outage 1036L (356s Milo - 554s Travers) installing interphase spacers and repairing the inner of the conductor (str 5-45) 7.5 Days
Continuous		  
31-Oct-25 07:00 02-Nov-25 18:00 ALTALINK Outage 944L (132s Ware Junction - 275s Jenner) modifying existing structure 944L156 from a tangent assembly to a floating DE/phase raise configuration to tap onto a new adjacent substation 2.5 Days
Continuous		  
31-Oct-25 07:00 02-Nov-25 18:00 ALTALINK RB 951L (132s Ware Junction - 275s Jenner) due to proximity 2.5 Days
Continuous		  
01-Nov-25 08:00 02-Nov-25 18:00 ENMAX Outage 11.82L (SS-11 - SS-14), 11.83L (SS-162 - SS-11), 11.3TR (SS-11), 11.2TR (SS-11), 11B138-11.82 (SS-11), 11B138-11.83 (SS-11), 11B138-BT5 (SS-11) substation - insulator washing (fall).  power factor test 1.46 Days
Continuous		  
02-Nov-25 07:00 09-Nov-25 19:00 ATCO RB 7L16 (766s Nevis - 948s Heatburg) HOP on 7L16 to facilitate work adjacent to line for CETO project 7.5 Days
Continuous		  
02-Nov-25 09:00 04-Nov-25 14:00 ENMAX Outage 33.83L (SS-33 - SS-41), 33B138-33.83 (SS-33), 41B138-33.83 (SS-41) install line surge arrestors at Sub 41 2.21 Days
Continuous		  
03-Nov-25 06:00 10-Nov-25 18:00 ATCO Outage 9L16 (755s Cordel - 972s Tinchebray) install foundations for new 9L16 structures 73 and 74 in preparation of the future line bay re-termination into 972S tinchebray expansion, part2 7.5 Days
Continuous		  
03-Nov-25 07:00 09-Nov-25 17:00 EPCOR Outage 814s T1 (814s Bellamy), 814s B2401 (814s Bellamy), 814s B2407 (814s Bellamy), BR721 (Rossdale), 814s BAB1 (814s Bellamy) bushing replacement and 240kv SF6 gas tests and leak checks 6.42 Days
Continuous		  
03-Nov-25 07:00 04-Nov-25 16:00 ENMAX Outage 3.82L (SS-3 - SS-8), 3.3TR (SS-3), 3B138-3.82 (SS-3), 3MD138-3.3TR (SS-3) 3.3TR transformer protection 'S' protection replacement with 'B' protection, 3MD138-3.3TR commissioning and trip test 3B138-3.82 1.38 Days
Continuous		  
03-Nov-25 07:00 09-Nov-25 19:00 ATCO RB 9L20 (755s Cordel - 766s Nevis) complete construction activities on CETO project adjacent to 9L20 6.5 Days
Continuous		  
03-Nov-25 07:00 21-Nov-25 17:00 EPCOR TE EP 511s Protection & Control (EP 511s Victoria) protection block on “A” protections for VN21 at Victoria 18.42 Days
Continuous		  
03-Nov-25 07:00 19-Dec-25 17:00 EPCOR TE 987s Protection & Control (987s Clover Bar) protection blocking for P&C maintenance at Cloverbar 46.42 Days
Continuous		  
03-Nov-25 07:00 07-Nov-25 17:00 EPCOR TE Protection & Control (Poundmaker) protection blocking for P&C maintenance. at Poundmaker 4.42 Days
Continuous		  
03-Nov-25 07:00 03-Nov-25 17:00 ENMAX RB 2.83L (SS-5 - 2.83L tap), 2.83L (SS-2 - 2.83L tap), 2.83L (SS-13 - 2.83L tap) tree trimming 10 Hours
Daily		  
03-Nov-25 07:00 04-Nov-25 18:00 ALTALINK TE AltaLink Telecom Equipment 947s MPLS node addition upgrade 1.46 Days
Daily		  
03-Nov-25 07:00 04-Nov-25 17:00 EPCOR Outage T3 (EP Hardisty) lighting upgrade (#8) on TX3 1.42 Days
Continuous		  
03-Nov-25 08:00 05-Nov-25 15:30 ALTALINK TE 523s RTU/SCADA (523s Bullshead) upgrade the configuration regarding the card replacement project 2.31 Days
Daily		  
03-Nov-25 08:00 05-Nov-25 15:30 ALTALINK TE 523s Protection & Control (523s Bullshead) removing B21/L1 (600L) from service for card replacements project 2.31 Days
Daily		  
03-Nov-25 08:00 15-Nov-25 16:00 Syncrude Outage AL-2 (Aurora - D05 Syncrude), 222 (Aurora), 223 (Aurora), D05 514 (D05), D05 511 (D05), D05 512 (D05) complete D05 substation zone 3 260kV PM 12.33 Days
Continuous		  
03-Nov-25 08:00 03-Nov-25 17:00 ALTALINK, Lethbridge Outage 667L (146s MacDonald - 370s North Lethbridge), 146s 667 (146s Macdonald) 146s667L open end outage, add CT circuit into new sel ddr, recording and commission, protection outages on 667L "A" protection relay 9 Hours
Continuous		  
03-Nov-25 08:00 03-Nov-25 17:00 ALTALINK, Lethbridge IO 667L (146s MacDonald - 370s North Lethbridge) 146s667L open end outage required to add CT circuit into new SEL DDR and test DDR recording and commission 9 Hours
Daily		  
03-Nov-25 08:00 07-Nov-25 17:30 ALTALINK TE 678s RTU/SCADA (678s Okotoks) major SCADA upgrade project, replacement of D20 RTU with new SG-4260 data concentrator, deficiency cleanup and complete points check 4.4 Days
Daily		  
03-Nov-25 08:00 09-Nov-25 16:00 ATCO RB 7L48 (787s High Prairie - 7L48 tap), 7L48 (794s Valleyview - 7LA48 tap) walk up and climbing inspection 6.33 Days
Continuous		  
03-Nov-25 08:00 04-Nov-25 16:00 ENMAX Outage 12.1TR (SS-12) replace CT terminal 1.33 Days
Continuous		  
03-Nov-25 08:00 06-Nov-25 16:00 ENMAX TE Protection & Control (SS-12) 12sub 138kV bus differential protection CT terminal replacement 3.33 Days
Daily		  
03-Nov-25 08:00 07-Nov-25 17:00 ALTALINK TE 397s RTU/SCADA (397s Benbow) update configuration for L2 protection upgrade and AIS 1159 additions 4.38 Days
Daily		  
03-Nov-25 08:00 07-Nov-25 17:00 ALTALINK TE 347s RTU/SCADA (347s Fox Creek) update config to add and test new 1159AIS points 4.38 Days
Daily		  
03-Nov-25 08:00 04-Nov-25 18:00 ENMAX Outage 2.3TR (SS-2) tap changer Inspection - 2.3-tc. oil filtration maintenance - 2.3-tc 1.42 Days
Continuous		  
03-Nov-25 08:00 03-Nov-25 12:00 ENMAX TE RTU/SCADA (SS-10) transfer of SCADA from JMUX to JPAX at substations in ring 2 4 Hours
Continuous		  
03-Nov-25 08:00 03-Nov-25 16:00 ENMAX TE RTU/SCADA (SS-23) upgrade SDN 8 Hours
Continuous		  
03-Nov-25 09:00 10-Nov-25 16:00 ATCO RB 7L46 (813s Little Smoky - 845s Big Mountain) pole replacement line to ground issue ( Line raise ) 7.29 Days
Continuous		  
03-Nov-25 09:00 10-Nov-25 16:00 ATCO Outage 7L45 (798s Bridge Creek - 813s Little Smoky) pole replacement line to ground issue ( Line raise ) 7.29 Days
Continuous		  
03-Nov-25 09:00 06-Nov-25 09:00 BCH Outage T3 (BCH Natal), 12CB23 (BCH Natal) natal substation replacement and ETM install BC Hydro maintenance does not affect Alberta ATC 3 Days
Continuous		 AB-BC
03-Nov-25 09:00 07-Nov-25 18:00 ALTALINK Outage 477s 138kV Bus (477s Amoco West Pembina), 841L (477s Amoco West Pembina - 489s Petro-Canada Brazeau River), 844L (358s Amoco Brazeau - 477s Amoco West Pembina), 477s T1 (477s Amoco West Pembina), 477s 841X (477s Amoco West Pembina), 477s 844X (477s Amoco West Pembina), 477s 18 (477s Amoco West Pembina), 477s 19 (477s Amoco West Pembina) replace CTs associated with 477s841X & 477s844X, remove PCB light on 358s 844L a-frame 4.38 Days
Continuous		  
03-Nov-25 09:00 05-Nov-25 17:00 ATCO TE ATCO Telecom Equipment Nevis_S-Telecom outage to install new Nokia RS232 & x.21 distribution panels & re cabling. install new SAR A, SDI cards 1.3/1.4 slots, ETH cards 1.1/1.2 2.33 Days
Continuous		  
03-Nov-25 09:00 07-Nov-25 17:00 ALTALINK TE 102s RTU/SCADA (102s Langdon) add T4 ASMA points from the new qualitrol ITM delay 4.33 Days
Daily		  
03-Nov-25 10:00 07-Nov-25 17:00 ALTALINK TE 397s Protection & Control (397s Benbow) settings changes and testing associated with new 11/252, 11/452, & B87/138B protections 4.29 Days
Daily		  
03-Nov-25 10:30 06-Nov-25 17:30 ALTALINK Outage 38s C1 (38s East Edmonton), 38s 3052 (38s East Edmonton) replace CT 3.29 Days
Continuous		  
03-Nov-25 11:30 06-Nov-25 16:30 ALTALINK TE 159s Protection & Control (159s Colinton) protection upgrade 3.21 Days
Daily		  
03-Nov-25 11:30 06-Nov-25 16:30 ALTALINK TE 159s RTU/SCADA (159s Colinton) update RTU database 3.21 Days
Daily		  
03-Nov-25 12:00 06-Nov-25 18:00 ALTALINK Outage 749L (899s Edgerton - 749AL tap), 899s 749X (899s Edgerton) component replacement from 749L123 - 749L292 3.25 Days
Continuous		  
03-Nov-25 12:00 10-Nov-25 17:00 ATCO TE 951s RTU/SCADA (951s Thickwood Hills) firmware upgrades of line protection relays and breaker fail relays 7.21 Days
Continuous		  
03-Nov-25 12:00 06-Nov-25 18:00 ALTALINK Outage 744L (235s Entwistle - 744AL tap), 235s 744W (235s Entwistle) urgent outage to replace rotting arms and fixing conductor at structures 97A, 96A, 94A, 7 3.25 Days
Continuous		  
03-Nov-25 12:30 03-Nov-25 17:00 ENMAX, ALTALINK Outage 50L (44s Bearspaw Plant - SS-21), 44s 50X (44s Bearspaw Plant) 44s50X heater replacement / site inspection 4.5 Hours
Continuous		  
03-Nov-25 12:30 03-Nov-25 17:00 ENMAX, ALTALINK RB 50L (44s Bearspaw Plant - SS-21) 44s50X heater replacement / site inspection 4.5 Hours
Continuous		  
03-Nov-25 13:00 06-Nov-25 17:00 ALTALINK Outage 83s T3 (83s Taber), 83s 64 (83s Taber) leak repair 3.17 Days
Continuous		  
03-Nov-25 13:00 07-Nov-25 11:00 ALTALINK Outage 798L (77s Sagitawah - 364s Whitecourt Industrial), 77s 552 (77s Sagitawah), 77s 352 (77s Sagitawah), 364s 798 (364s Whitecourt Industrial), 77s 798N (77s Sagitawah) replace CTs associated with 77s352 3.92 Days
Continuous		  
03-Nov-25 13:00 13-Nov-25 16:00 Saskpower Outage SaskPower A1R planned outage 10.13 Days
Continuous		 AB-SK
03-Nov-25 14:00 04-Nov-25 17:30 ALTALINK Outage 39s 26 (39s Bickerdike) first trip and breaker maintenance on 39s26 27.5 Hours
Continuous		  
03-Nov-25 14:30 04-Nov-25 17:00 ALTALINK TE 650s Protection & Control (650s Hansman Lake) maintenance on 650s B87/21/67N/L10 (885L) 26.5 Hours
Continuous		  
03-Nov-25 14:30 04-Nov-25 17:00 ALTALINK TE 648s Protection & Control (648s Metiskow) maintenance 648s B87/21/67N/L3 (885L 26.5 Hours
Continuous		  
03-Nov-25 14:30 06-Nov-25 17:30 ALTALINK TE 405s RTU/SCADA (405s Waupisoo) update configuration for SCADA alarm splitting and ACC visibility upgrades 3.13 Days
Daily		  
04-Nov-25 06:00 04-Nov-25 18:00 EPCOR Outage 330p 805 (330p Genesee), 330P 12TC1 (330p Genesee), 330p 1214 (330p Genesee), 330p 1210 (330p Genesee), 330p 1201 (330p Genesee), 330p 1204 (330p Genesee), 330p 1207 (330p Genesee), 330p 500kV Bus 1 (330p Genesee) emergency 500kV BUS #1 outage for removing connection from 12TC1D to 500kV BUS. 12TC1D will be isolated/air gapped from 500kV BUS on restoration of BUS. 12 Hours
Continuous		  
04-Nov-25 07:00 13-Nov-25 17:00 ENMAX TE Protection & Control (SS-3) 3 sub BMR84 protection outage 9.42 Days
Daily		  
04-Nov-25 07:00 05-Nov-25 17:00 ATCO TE 951s Protection & Control (951s Thickwood Hills) 9L112 B relay will be out of service for firmware upgrade and local testing 1.42 Days
Continuous		  
04-Nov-25 07:00 10-Nov-25 17:00 ATCO TE 951s Protection & Control (951s Thickwood Hills) breaker fail relays for firmware upgrade and local testing 6.42 Days
Continuous		  
04-Nov-25 07:00 07-Nov-25 17:00 ALTALINK Outage 409s T1 (409s Shell Scotford) customer to replace T1 NGR 3.42 Days
Continuous		  
04-Nov-25 07:00 04-Nov-25 17:00 ENMAX RB 24.81L (SS-24 - SS-31) tree trimming 10 Hours
Daily		  
04-Nov-25 07:00 04-Nov-25 17:00 ENMAX RB 11.81L (SS-11 - SS-13) tree trimming 10 Hours
Daily		  
04-Nov-25 07:00 04-Nov-25 17:00 ENMAX RB 24.82L (SS-24 - SS-65) tree trimming 10 Hours
Daily		  
04-Nov-25 07:30 13-Nov-25 17:30 ALTALINK RB 1053L (132s Ware Junction - 324s Cassils) install insulators and travelers for new 1075L on open side of tower opposite to 1053L on structures 9.42 Days
Daily		  
04-Nov-25 08:00 04-Nov-25 17:00 Lethbridge Outage 813L (146s MacDonald - 241s Uplands), 146s 813L (146s Macdonald), 241s 813L (241s Uplands) 146s813L open end outage 9 Hours
Continuous		  
04-Nov-25 08:00 04-Nov-25 13:00 ALTALINK Outage 633L (56s Boyle - 405s Waupisoo), 405s 633 (405s Waupisoo) SCADA alarm splitting and ACC visibility upgrades 5 Hours
Daily		  
04-Nov-25 08:00 06-Nov-25 16:00 SUNCOR IO 29EDD-94 Voyageur 29EDD94;S23 meter- meter certification 2.33 Days
Continuous		  
04-Nov-25 08:00 06-Nov-25 16:00 SUNCOR IO 30EDD-2 30EDD2;TG1 S23 meter reverification 2.33 Days
Continuous		  
04-Nov-25 08:00 04-Nov-25 20:00 SUNCOR TE Suncor RTU/SCADA (Suncor) SDC failover test 2025 12 Hours
Continuous		  
04-Nov-25 08:00 04-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment 9932R MPLS firmware upgrade 9 Hours
Daily		  
04-Nov-25 08:00 04-Nov-25 16:00 ENMAX IO Protection & Control (SS-13) 13sub sstr13-1, sstr13-2 outage. automatic transfer switch maintenance 8 Hours
Continuous		  
04-Nov-25 08:00 04-Nov-25 17:00 ALTALINK TE 293s RTU/SCADA (293s Bernese), AltaLink Telecom Equipment upgrade MPLS node 9 Hours
Daily		  
04-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE 104s RTU/SCADA (104s Watson Creek), AltaLink Telecom Equipment upgrade MPLS 2.38 Days
Daily		  
04-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE 384s RTU/SCADA (384s Keystone), AltaLink Telecom Equipment MPLS firmware upgrade 2.38 Days
Daily		  
04-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE 61s RTU/SCADA (61s Lodgepole), AltaLink Telecom Equipment MPLS firmware upgrade 2.38 Days
Daily		  
04-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE 414s RTU/SCADA (414s Gulf Robb), AltaLink Telecom Equipment MPLS firmware upgrade 2.38 Days
Daily		  
04-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE 412s RTU/SCADA (412s Shell Eagle Creek), AltaLink Telecom Equipment MPLS firmware upgrade 2.38 Days
Daily		  
04-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 426s RTU/SCADA (426s Coalspur) MPLS firmware upgrade 2.38 Days
Daily		  
04-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 953s RTU/SCADA (953s Lake Louise), 945s RTU/SCADA (945s Sunshine Village), 115s RTU/SCADA (115s Mount Allan), 437s RTU/SCADA (437s Baymag), 43s RTU/SCADA (43s Shell Canada Jumping Pound Jct) MPLS firmware upgrade 2.38 Days
Daily		  
04-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE 438s RTU/SCADA (438s Westlock), AltaLink Telecom Equipment MPLS firmware upgrade 2.38 Days
Daily		  
04-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE 701s RTU/SCADA (701s Blue Ridge Lumber), AltaLink Telecom Equipment MPLS firmware upgrade 2.38 Days
Daily		  
04-Nov-25 09:00 04-Nov-25 17:00 ATCO TE ATCO Telecom Equipment Linden_T-Telecom- commissioning a new DC power rectifier remove the old Haley rectifiers 8 Hours
Continuous		  
04-Nov-25 09:00 06-Nov-25 17:00 ATCO RB 7L86 (822s Wolf Lake - 1200s Foster Creek) L-G clearance mitigation pole changes. 2.33 Days
Daily		  
04-Nov-25 09:00 24-Nov-25 13:00 ATCO TE 741s RTU/SCADA (741s Fox Creek) SCADA SMP being updated with new points for 7L90 RAS addition 20.17 Days
Continuous		  
04-Nov-25 09:30 04-Nov-25 17:00 ALTALINK TE 69s Protection & Control (69s North Barrhead) settings update on 723L (L3) ‘A’ protection to facilitate the commissioning of the travelling wave relay 7.5 Hours
Daily		  
04-Nov-25 09:30 04-Nov-25 17:00 ALTALINK TE 150s Protection & Control (150s Clyde) settings update on 723L 7.5 Hours
Daily		  
04-Nov-25 10:00 04-Nov-25 18:00 ALTALINK Outage 353s T1 (353s Plamondon), 353s 195 (353s Plamondon) replace broken strain insulators in 25kV bus 1 8 Hours
Daily		  
04-Nov-25 10:00 05-Nov-25 17:00 ATCO TE 732s RTU/SCADA (732s Mitsue) pre-commission new SCADA controls from STG to the Mitsue new RTU 31 Hours
Continuous		  
04-Nov-25 10:30 10-Dec-25 15:00 ATCO TE 710s Protection & Control (710s Vermilion) 86-50BF-1/700BS1 secondary protection block common lockout so we can tie in new BF trips from 7L117 A&B, 7L129 A&B, 7L130 A&B 36.19 Days
Continuous		  
04-Nov-25 10:30 01-Dec-25 15:00 ATCO TE 710s Protection & Control (710s Vermilion) 87BA/700BS1, secondary protection, blocked for 7L129 primary injection as well as 7L117 primary injection as well as local SCADA cutover testing 27.19 Days
Continuous		  
04-Nov-25 13:00 04-Nov-25 18:00 ALTALINK Outage 728L (353s Plamondon - 405s Waupisoo), 405s 728 (405s Waupisoo), 353s 452 (353s Plamondon) SCADA alarm splitting and ACC visibility upgrades 5 Hours
Daily		  
05-Nov-25 07:00 06-Nov-25 17:00 ENMAX TE Protection & Control (SS-3) 3.3TR A and B protection outage 1.42 Days
Daily		  
05-Nov-25 07:00 06-Nov-25 17:00 ATCO TE 951s Protection & Control (951s Thickwood Hills) 9L30 B relay will be out of service for firmware upgrade and local testing 1.42 Days
Continuous		  
05-Nov-25 07:00 05-Nov-25 17:00 ENMAX RB 11.82L (SS-11 - SS-14) tree trimming 10 Hours
Daily		  
05-Nov-25 07:00 07-Nov-25 17:00 EPCOR Outage 72LH8 (EP 803s Lambton - EP Hardisty), T2 (EP Hardisty), H723 (EP Hardisty), H722 (EP Hardisty), HAB2 (EP Hardisty) TX2 zone, lighting upgrade 2.42 Days
Continuous		  
05-Nov-25 08:00 05-Nov-25 18:00 Syncrude TE Syncrude ICCP Outage server update
 10 Hours
Daily		  
05-Nov-25 08:00 05-Nov-25 15:00 ALTALINK, ENMAX Outage 688L (653s Summit - 688AL tap), 688AL (284s Nose Creek - 688L tap), 284s T1 (284s Nose Creek), 653s 688 (653s Summit) 284s strain insulator replacement on the structure inside the 7 Hours
Daily		  
05-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE 650s Protection & Control (650s Hansman Lake) card replacement on 650s B21/79/L12 (7L224) 1.38 Days
Continuous		  
05-Nov-25 08:00 05-Nov-25 18:00 ALTALINK, CascadeP Outage 1135L (39s Bickerdike - 1047s Whisky Jack), 39s 26 (39s Bickerdike), 39s 29 (39s Bickerdike) first trip & breaker maintenance on 39s29, and repair 39s28 10 Hours
Daily		  
05-Nov-25 08:00 05-Nov-25 13:00 ALTALINK Outage 796L (405s Waupisoo - 796AL tap), 796L (282s Grassland - 796AL tap), 796AL (242s Flat Lake - 796L tap), 405s 796 (405s Waupisoo) SCADA alarm splitting and ACC visibility upgrades 5 Hours
Daily		  
05-Nov-25 08:00 06-Nov-25 16:00 ENMAX Outage 12.2TR (SS-12) CT terminal replacement 1.33 Days
Continuous		  
05-Nov-25 08:00 05-Nov-25 12:00 ENMAX TE RTU/SCADA (SS-12) transfer of SCADA from JMUX to JPAX 4 Hours
Continuous		  
05-Nov-25 08:00 05-Nov-25 16:00 ENMAX Outage 39.4TR (SS-39) oil sampling - 39.4-TC. silica gel canister upgrade - 39.4 TR - MT 8 Hours
Continuous		  
05-Nov-25 08:00 05-Nov-25 17:00 ALTALINK, TRANSALTA TE AltaLink Telecom Equipment, 229s RTU/SCADA (229s Glenwood), 502s RTU/SCADA (502s Shell Waterton (#2)) urgent troubleshooting required at 502S and 229S to fix supervisory intermittently failing at 229S that highly suspect caused by 9232R raw socket conversion 9 Hours
Daily		  
05-Nov-25 08:30 05-Nov-25 17:00 ALTALINK TE 140s Protection & Control (140s Thompson) card replacement 8.5 Hours
Daily		  
05-Nov-25 08:30 05-Nov-25 17:00 ALTALINK TE 650s Protection & Control (650s Hansman Lake) card replacement 8.5 Hours
Daily		  
05-Nov-25 09:00 05-Nov-25 16:00 ATCO Outage 7L587 (822s Wolf Lake - 826s Marguerite Lake), 822s 701 (822s Wolf Lake) inspect CT wiring at RTXP test switch and replace
 7 Hours
Continuous		  
05-Nov-25 09:00 05-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 846s Grand Centre RTU/SCADA low BES firewall install 8 Hours
Continuous		  
05-Nov-25 09:00 06-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 766s RTU/SCADA (766s Nevis) low BES firewall install 1.33 Days
Continuous		  
05-Nov-25 09:30 05-Nov-25 16:30 ALTALINK Outage 421s T1 (421s Hays) 421sT1 H3 hot bushing 7 Hours
Daily		  
05-Nov-25 12:00 12-Nov-25 07:00 ENMAX Outage 3.4TR (SS-3) 3.4TR transformer protection 'S' protection replacement with 'B' protection 6.79 Days
Continuous		  
05-Nov-25 13:00 05-Nov-25 18:00 ALTALINK Outage 405s C2 (405s Waupisoo), 405s 23 (405s Waupisoo) SCADA alarm splitting and ACC visibility upgrades 5 Hours
Daily		  
05-Nov-25 13:00 05-Nov-25 14:00 ALTALINK, CENOVUS TE 154s RTU/SCADA (154s Black Spruce), 539s RTU/SCADA (539s Sunday Creek), AltaLink Telecom Equipment upgrade MPLS node 60 Mins
Daily		  
05-Nov-25 17:00 06-Nov-25 18:00 ALTALINK Outage 39s 29 (39s Bickerdike) breaker maintenance on 39s29 25 Hours
Continuous		  
06-Nov-25 07:00 06-Nov-25 13:00 ALTALINK Outage 729L (40s Wetaskiwin - 729AL tap), 729L (542s Ervick - 729AL tap), 6500s T1 (6500s Trueweld Grating), 40s 729E (40s Wetaskiwin) remove PCB ballast fixture on structure 40s126 6 Hours
Daily		  
06-Nov-25 07:00 06-Nov-25 13:00 ALTALINK Outage 397s T2 (397s Benbow), 397s 31 (397s Benbow) breaker trip circuit cutovers and testing 6 Hours
Daily		  
06-Nov-25 07:00 07-Nov-25 17:00 ATCO TE 951s Protection & Control (951s Thickwood Hills) 9L07 B relay will be out of service for firmware upgrade and local testing. 1.42 Days
Continuous		  
06-Nov-25 07:00 06-Nov-25 17:00 ENMAX RB 11.82L (SS-11 - SS-14) tree trimming 10 Hours
Daily		  
06-Nov-25 07:00 06-Nov-25 09:00 ALTALINK TE 83s Protection & Control (83s Taber) remote settings change redundant protection 2 Hours
Daily		  
06-Nov-25 07:00 06-Nov-25 09:00 ALTALINK TE 254s Protection & Control (254s Coaldale) remote settings change redundant protection 2 Hours
Daily		  
06-Nov-25 08:00 06-Nov-25 13:00 ALTALINK Outage 405s C1 (405s Waupisoo), 405s 17 (405s Waupisoo) SCADA alarm splitting and ACC visibility upgrades 5 Hours
Daily		  
06-Nov-25 08:00 06-Nov-25 12:00 ENMAX Outage 40.1TR (SS-40) oil sampling, reversing switch check 4 Hours
Continuous		  
06-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment 898s MPLS chassis and firmware upgrade 9 Hours
Daily		  
06-Nov-25 08:00 06-Nov-25 17:00 ALTALINK TE 45s RTU/SCADA (45s Bretona), 45s Protection & Control (45s Bretona), AltaLink Telecom Equipment upgrade MPLS 9 Hours
Daily		  
06-Nov-25 08:30 06-Nov-25 15:00 ALTALINK TE 993s Protection & Control (993s Abee) card replacement 6.5 Hours
Daily		  
06-Nov-25 08:30 06-Nov-25 17:00 ALTALINK TE 51s Protection & Control (51s Wainwright) card replacement 8.5 Hours
Daily		  
06-Nov-25 09:00 06-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 874s RTU/SCADA (874s McKay River) removal of DJF 8 Hours
Continuous		  
06-Nov-25 09:00 06-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 849s RTU/SCADA (849s Joslyn Creek) firewall install, outage to local network & SCADA communications 8 Hours
Continuous		  
06-Nov-25 09:00 06-Nov-25 12:59 BCH Outage 2L113 (BCH Cranbrook - BCH Natal) F26 AOP 3.98 Hours
Continuous		 AB-BC
06-Nov-25 09:30 07-Nov-25 16:30 ATCO TE 861s RTU/SCADA (861s Eureka River) Scada/RTU upgrades 31 Hours
Continuous		  
06-Nov-25 12:00 06-Nov-25 16:00 ENMAX Outage 6.1TR (SS-6) oil sampling, silica gel canister upgrade 4 Hours
Continuous		  
06-Nov-25 13:00 06-Nov-25 18:00 ALTALINK Outage 40s T2 (40s Wetaskiwin) remove PCB ballast fixture on structure near T2 138 kV risers 5 Hours
Daily		  
06-Nov-25 13:00 18-Nov-25 17:00 BCH Outage 2L113 (BCH Cranbrook - BCH Natal), T3 (BCH Natal), T4 (BCH Natal), 12CB23 (BCH Natal) NTL substation replacement + ETM install 12.17 Days
Continuous		 AB-BC
07-Nov-25 07:00 08-Nov-25 17:00 ATCO TE 951s Protection & Control (951s Thickwood Hills) 9L193-909 B relay - firmware upgrade and local testing 1.42 Days
Continuous		  
07-Nov-25 07:00 07-Nov-25 17:00 ENMAX RB 11.82L (SS-11 - SS-14) tree trimming 10 Hours
Daily		  
07-Nov-25 08:00 18-Nov-25 16:00 ATCO Outage 7L117 (706s Irish Creek - 710s Vermilion), 710s 701 (710s Vermilion), 706s 703 (706s Irish Creek) 7L117 - A and B line protection upgrade 11.33 Days
Continuous		  
07-Nov-25 08:00 18-Nov-25 15:30 ATCO TE 710s Protection & Control (710s Vermilion) protection upgrade 11.31 Days
Continuous		  
07-Nov-25 08:00 07-Nov-25 17:00 ATCO TE 732s Protection & Control (732s Mitsue) block 21B/7L162 to update settings 9 Hours
Continuous		  
07-Nov-25 08:00 07-Nov-25 12:00 ENMAX Outage 31.2TR (SS-31) oil sampling - 31.2-TC 4 Hours
Continuous		  
07-Nov-25 10:30 18-Nov-25 15:00 ATCO TE 710s Protection & Control (710s Vermilion) blocking A and B of each relay for 7L117 secondary injection 11.19 Days
Continuous		  
07-Nov-25 12:01 07-Nov-25 14:00 ENMAX Outage 31.3TR (SS-31) oil sampling, tap changer, oil filtration maintenance 119 Mins
Continuous		  
07-Nov-25 14:01 07-Nov-25 16:00 ENMAX Outage 31.1TR (SS-31) oil sampling - 31.1-TC 119 Mins
Continuous		  

Prepared On:   2025-10-31   16:12:40

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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