Alberta Electric System Operator
System Co-ordination Plan
2026-09-17 to 2026-09-25
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 30-Sep-26 17:00 ALTALINK Outage 256s C1 (256s Harmattan) forced outage 13,425 Hours
Continuous
 
25-Nov-25 17:46 18-Sep-26 18:00 ATCO Outage 876s 901T (876s Brintnell) forced outage oil leaking 7,127.23 Hours
Continuous
 
27-Nov-25 08:30 27-Nov-27 16:30 ALTALINK TE 89s Protection & Control (89s Ellerslie) DSP card replacements on1057L B87/L3 and B240B1 B87/240B1 17,528 Hours
Daily
 
04-Jan-26 08:00 16-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
 
21-Jan-26 08:00 30-Oct-26 16:00 ENMAX Outage 5.7TR (SS-5) 25kV switchgear replacement 6,775 Hours
Continuous
 
06-Mar-26 17:00 13-Nov-26 17:00 EPCOR Outage T1 (Woodcroft) woodcroft: TX1 LCR civil 6,048 Hours
Continuous
 
10-Mar-26 10:00 30-Nov-26 17:00 ATCO TE 743s RTU/SCADA (743s Sarah Lake) throughout the course of the project, different apparatus are being replaced, RTU will be blocked prior to download 6,368 Hours
Continuous
 
01-May-26 17:00 25-Nov-26 17:00 EPCOR Outage T1 (Meadowlark) T1 LCR civil work 4,993 Hours
Continuous
 
19-May-26 07:00 02-Oct-26 17:00 EPCOR TE 987s Protection & Control (987s Clover Bar) protection blocking - relay maintenance and bus differential upgrade project 2,434 Hours
Continuous
 
27-May-26 18:00 30-Sep-26 17:00 ALTALINK Outage 526s C1 (526s Buffalo Creek) forced outage 3,023 Hours
Daily
 
04-Jun-26 07:01 10-Feb-27 17:00 EPCOR Outage T1 (Rossdale) rossdale: TX1 lcr civil 6,034.98 Hours
Continuous
 
07-Jun-26 17:05 01-Oct-26 00:00 ACCIONA, ENBRIDGE, ICPCL Outage 139s C1 (139s Hillridge) forced outage 2,766.92 Hours
Continuous
 
08-Jun-26 07:00 04-Dec-26 17:00 EPCOR TE EP 511s Protection & Control (EP 511s Victoria) 72kV breaker fail protection blocking 2,626 Hours
Continuous
 
15-Jun-26 07:00 18-Dec-26 17:00 EPCOR TE 805s Protection & Control (805s Jasper) protection blocking, breaker replacement project 1,954 Hours
Continuous
 
19-Jun-26 17:00 03-Dec-27 17:00 EPCOR Outage EP 511s Victoria T3 (EP 511s Victoria) emergency outage due to degraded asset condition 12,769 Hours
Continuous
 
10-Jul-26 08:00 18-Nov-26 16:00 Syncrude Outage 815 (Syncrude Mildred Lake), 816 (Syncrude Mildred Lake) replace 72 kV underground feeder cables on west mine feeder 2,696 Hours
Continuous
 
14-Jul-26 08:00 22-Oct-26 17:00 ALTALINK Outage 287s 552 (287s Hazelwood) 287s552 must be open during 443L and 417L outage for the 214s AIS to work properly 1,905 Hours
Continuous
 
15-Jul-26 14:01 22-Oct-26 09:00 ALTALINK Outage 417L (55s Olds - 281s Johnson), 55s T1 (55s Olds), 55s T2 (55s Olds), 55s 417 (55S Olds), 287s 552 (287s Hazelwood), 55s 2 (55s Olds) mobile install at 55s for P_C major upgrade, repair/replace s80, s83, s84. salvage s51. 1,962.98 Hours
Continuous
 
20-Jul-26 07:00 31-Dec-26 17:00 EPCOR TE Protection & Control (Woodcroft) woodcroft: protection blocking for TX1 LCR, line protection testing, and repairs 3,947 Hours
Continuous
 
03-Aug-26 08:00 30-Oct-26 16:00 ALTALINK TE 55s RTU/SCADA (55s Olds) adding/testing new alarms & controls associated with the 55s P&C 2,120 Hours
Daily
 
04-Aug-26 07:03 17-Sep-26 17:00 ALTALINK Outage 869L (163s Amoco Empress - 204s Sandy Point), 204s T1 (204s Sandypoint), 163s 869W (163s Amoco Empress) customer maintenance work 777.95 Hours
Continuous
 
10-Aug-26 07:30 09-Oct-26 17:00 ALTALINK Outage 434s T3 (434s East Stony Plain) T3 transformer replacement 1,281.5 Hours
Continuous
 
13-Aug-26 16:31 24-Sep-26 17:00 ALTALINK Outage 71s T1 (71s Lamoureux) bushing issue 1,008.48 Hours
Continuous
 
20-Aug-26 09:00 09-Oct-26 10:00 ALTALINK Outage 58s T1 (58s Edson) 58s T1 transformer replacement and containment install 1,201 Hours
Continuous
 
25-Aug-26 07:00 21-Sep-26 17:00 ATCO TE 743s Protection & Control (743s Sarah Lake) 21A/7L55 for relay testing and wiring, element will be out of service under GOI 2-81723 658 Hours
Continuous
 
25-Aug-26 08:00 21-Sep-26 17:00 ATCO TE 743s Protection & Control (743s Sarah Lake) 21B/7L55 for relay testing and wiring, element will be out of service under GOI 2-81723 657 Hours
Continuous
 
25-Aug-26 08:00 21-Sep-26 17:00 ATCO TE 743s Protection & Control (743s Sarah Lake) 86-50BF-1/700BS1, 94-50BF-1/700BS1 657 Hours
Continuous
 
25-Aug-26 08:00 21-Sep-26 17:00 ATCO TE 743s Protection & Control (743s Sarah Lake) 50BF/701 for relay testing 657 Hours
Continuous
 
26-Aug-26 12:00 21-Sep-26 11:00 ATCO Outage 743s 701 (743s Sarah Lake), 743s 701A (743s Sarah Lake), 743s 7L55D3 (743s Sarah Lake), 7L55 (743s Sarah Lake - 809s Louise Creek), 809s 705 (809s Louise Creek) 743s Sarah lake rebuild 623 Hours
Continuous
 
31-Aug-26 07:00 17-Sep-26 17:00 ALTALINK Outage 869L (163s Amoco Empress - 204s Sandy Point), 204s T1 (204s Sandypoint), 163s 869W (163s Amoco Empress), 204s 869E (204s Sandy Point) 869L protection upgrades at 163s (iconic), replace 869L line protections at 204s, replace T1 meter 346 Hours
Continuous
 
31-Aug-26 07:00 19-Sep-26 17:00 ALTALINK, DOW RB 787L (166s Dow Chemical Fort Saskatchewan - 787AL tap), 787L (71s Lamoureux - 787AL tap) urgent repair - transmission line work 466 Hours
Daily
 
31-Aug-26 08:00 17-Sep-26 16:00 ALTALINK TE 204s RTU/SCADA (204s Sandy Point) RTU configuration updates for 869L - line protection and T1 meter replacement 416 Hours
Daily
 
31-Aug-26 08:00 17-Sep-26 16:00 ALTALINK TE 163s RTU/SCADA (163s Amoco Empress) SCADA configuration changes involving 869L protections 416 Hours
Daily
 
31-Aug-26 13:00 06-Oct-26 07:30 ATCO TE 790s Protection & Control (790s Poplar Hill), 790s RTU/SCADA (790s Poplar Hill) wire new breaker 508, 508 feeder protection into the station RTU and 701T protection 858.5 Hours
Continuous
 
02-Sep-26 07:00 21-Oct-26 15:00 ALTALINK, TRANSALTA Outage 320p GT3 (320p Keephills) maintenance 1,184 Hours
Continuous
 
02-Sep-26 09:00 21-Sep-26 13:00 BCH Outage 5L96 (BCH Selkirk - BCH Vaseux Lake) maintenance, BC maintenance does not affect the Alberta ATC 460 Hours
Continuous
AB-BC
06-Sep-26 08:00 20-Sep-26 19:00 ATCO RB 13L50 (2029s Heathfield - 2075s Newell) installing SVDs from str 1-775, then 975-1387 347 Hours
Continuous
 
06-Sep-26 08:30 18-Sep-26 00:00 ALTALINK Outage 234s T2 (234s Fort Assiniboine) emergency outage 279.5 Hours
Daily
 
08-Sep-26 07:00 23-Oct-26 17:00 EPCOR Outage 805s T4 (805s Jasper), EP 805s J2405 (EP 805s Jasper), EP 805s J2406 (EP 805s Jasper), EP 805s JAB4 (EP 805s Jasper) replacement LCR Jasper J2406/JDS10 1,090 Hours
Continuous
 
08-Sep-26 07:00 04-Oct-26 17:00 EPCOR Outage 72KN23 (Kennedale - Namao) UGT oil degasification project 634 Hours
Continuous
 
08-Sep-26 07:00 26-Sep-26 17:00 EPCOR Outage 72PM25 (Poundmaker - Meadowlark), T4 (Poundmaker), PM2402 (Poundmaker), PM2403 (Poundmaker), PM721 (Poundmaker), PMDS4 (Poundmaker), M726 (Meadowlark) doble Poundmaker TX4 130 Hours
Continuous
 
08-Sep-26 07:00 18-Dec-26 17:00 EPCOR TE EP 803s Protection & Control (EP 803s Lambton) protection blocking, DFR upgrade cutovers and commissioning 2,435 Hours
Continuous
 
08-Sep-26 08:00 13-Nov-26 17:00 ALTALINK, REDDEER Outage 464L (87s Gaetz - 209s Timberlands), 209s 464E (209s Timberlands) P&C panel replacements, 138 kV bus and line arrestor testing, transformer testing 1,594 Hours
Continuous
 
08-Sep-26 08:00 19-Sep-26 16:00 Syncrude Outage Mildred T19 (Syncrude Mildred Lake), 1935 (Syncrude Mildred Lake) complete bus 19 6-year PM 320 Hours
Continuous
 
08-Sep-26 09:00 13-Nov-26 17:00 ALTALINK, REDDEER Outage 768L (209s Timberlands - 217s North Red Deer), 209s T1 (209s Timberlands), 217s 768 (217s North Red Deer), 209s 768W (209s Timberlands) P&C panel replacements, 138 kV bus and line arrestor testing, transformer testing 1,593 Hours
Continuous
 
08-Sep-26 09:30 21-Sep-26 17:30 ATCO Outage 766s 701T (766s Nevis) 2026 apparatus leak repairs - 701T bushing replacements at 766s Nevis, transformer maintenance
320 Hours
Continuous
 
08-Sep-26 09:30 05-Oct-26 12:00 ATCO Outage 7L170 (875s Algar - 2011s Dawes), 7L38 (875s Algar - 917s Horse River), 875s 701T (875s Algar), 875s 701 (875s Algar), 875s 702 (875s Algar), 875S 701TCS (875s Algar) replace 701TCS + SCADA / protection upgrade 650.5 Hours
Continuous
 
08-Sep-26 09:30 05-Oct-26 17:30 ATCO TE 875s Protection & Control (875s Algar) replace 701TCS and SCADA / protection upgrade
656 Hours
Continuous
 
08-Sep-26 09:30 05-Oct-26 17:30 ATCO TE 917s Protection & Control (917s Horse River) replace 701TCS and SCADA / protection upgrade at 875s 656 Hours
Continuous
 
08-Sep-26 09:30 05-Oct-26 17:30 ATCO TE 2011s Protection & Control (2011s Dawes) replace 701TCS and SCADA / protection upgrade at 875s 656 Hours
Continuous
 
09-Sep-26 07:00 02-Oct-26 17:00 EPCOR Outage 72RV6 (EP 511s Victoria - Rossdale), EP 511s Victoria T3 (EP 511s Victoria), EP 511s V724 (EP 511s Victoria), EP 511s V725 (EP 511s Victoria), RV722 (Rossdale), EP 511s V723 (EP 511s Victoria), EP 511s VDS9 (EP 511s Victoria), EP 511s VAB3 (EP 511s Victoria) RV6/Victoria: RV6/TX3 Zone, civil works for emergency TX3 replacement 226 Hours
Continuous
 
10-Sep-26 08:00 22-Sep-26 16:00 ALTALINK TE 58s RTU/SCADA (58s Edson) update RTU/HMI configuration for the new T1 alarms/metering/controls 296 Hours
Daily
 
12-Sep-26 08:00 20-Sep-26 16:00 CNRL Outage 842s 75-TR-4701 (842s Horizon Upgrading), 842s 75-1903 (842s Horizon Upgrading), 842s 75-1904 (842s Horizon Upgrading), 842s 75-4701 (842s Horizon Upgrading), 842s 75-1903B (842s Horizon Upgrading), 842s 75-1904A (842s Horizon Upgrading) maintenance of transformer, breakers, disconnects, and protective relays 200 Hours
Continuous
 
12-Sep-26 08:00 27-Nov-26 16:00 SUNCOR Outage 29EDD-18 29PT-100 (29EDD-18 Firebag) replace secondary cables on 29PT-100 1,833 Hours
Continuous
 
12-Sep-26 16:30 18-Sep-26 08:30 ALTALINK Outage 123s T3 (123s Banff) test T3 and replace bushings. 474s mobile will bypass T3. 160 Hours
Continuous
 
14-Sep-26 06:00 18-Sep-26 19:00 ALTALINK RB 610L (83s Taber - 336s Fincastle) install temporary understrung line, stringing wire, Fortis 83s15L is understrung on 610L 109 Hours
Daily
 
14-Sep-26 07:00 20-Sep-26 17:00 EPCOR Outage EP 803s L2402 (EP 803s Lambton) Lambton - L2402 (min oil) breaker maintenance and CT doble 154 Hours
Continuous
 
14-Sep-26 07:00 25-Sep-26 17:30 ALTALINK RB 747L (37s North Calder - 711L tap), 747L (99s North St. Albert - 711L tap) aerial washing program 274.5 Hours
Continuous
 
14-Sep-26 07:00 25-Sep-26 17:00 EPCOR TE 72LH8 (EP 803s Lambton - EP Hardisty) LH8 - protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous
 
14-Sep-26 07:00 25-Sep-26 17:00 EPCOR TE 72CH9 (987s Clover Bar - EP Hardisty) CH9 - protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous
 
14-Sep-26 07:00 25-Sep-26 17:00 EPCOR TE 72CH11 (987s Clover Bar - EP Hardisty) CH11 - protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous
 
14-Sep-26 07:00 25-Sep-26 17:00 EPCOR TE 72LS24 (EP 803s Lambton - Strathcona) LS24 - protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous
 
14-Sep-26 07:00 25-Sep-26 17:00 EPCOR TE 72CN10 (987s Clover Bar - Namao) CN10 - protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous
 
14-Sep-26 07:00 25-Sep-26 17:00 EPCOR TE 72KN23 (Kennedale - Namao) KN23 - protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous
 
14-Sep-26 08:00 19-Sep-26 12:00 ENMAX Outage 1.81L (SS-1 - SS-20), 20B138-1.81 (SS-20), 1MD138-1.81 (SS-1) construction 1.81L river crossing 124 Hours
Continuous
 
14-Sep-26 08:00 27-Sep-26 16:00 SUNCOR Outage 29PL6-5 (29EDD-1 Millennium - 29EDD-2 Tar Island), 29EDD-1 29PS-196 (29EDD-1 Millennium), 29PS-44 (29EDD-22), 29EDD-1 29EDD1s1652 (29EDD-1 Millennium), 29EDD-1 29EDD1s1752 (29EDD-1 Millennium) 29EDD22;29PT-84 and 29PL6-5 system maintenance, 29PT-84 tap changer, 29PS-196 closing concern, 352-1700T racking mech to be adjusted 320 Hours
Continuous
 
14-Sep-26 08:00 17-Sep-26 16:00 ALTALINK, TRANSALTA TE 179s Protection & Control (179s Gleichen) complete PRC maintenance 80 Hours
Daily
 
14-Sep-26 08:00 18-Sep-26 15:00 CMH, TCPL TE MH-65L (MHS-7 Brier Park - Cancarb Energy Medicine Hat) carry out maintenance on the LDR-65L-A 103 Hours
Continuous
 
14-Sep-26 08:00 17-Dec-26 17:00 ATCO TE 738s RTU/SCADA (738s Virginia Hills), 738s Protection & Control (738s Virginia Hills) SCADA/protection upgrade at 738s Virginia Hills, cut over to the new SCADA system and tested 2,266 Hours
Continuous
 
14-Sep-26 08:00 07-Oct-26 16:00 ALTALINK TE 434s RTU/SCADA (434s Stony Plain) RTU database update 560 Hours
Daily
 
14-Sep-26 08:00 02-Oct-26 16:00 ALTALINK TE 434s Protection & Control (434s Stony Plain) new T3 protections cutover/testing 440 Hours
Daily
 
14-Sep-26 08:00 17-Sep-26 16:00 ENMAX, ALTALINK Outage 833L (SS-2 - SS-12), 2B138-D87 (SS-2), 2B138-D88 (SS-2), 12B138-833L (SS-12), MD93 (SS-2), MD94 (SS-2), 2MD138-833L (SS-2) install ITBs - 2RLY138-D87-D88 (BMR4), relay maintenance 32 Hours
Continuous
 
14-Sep-26 08:00 17-Sep-26 16:00 ENMAX, ALTALINK IO 833L (SS-2 - SS-12) install ITBs and relay maintenance 80 Hours
Continuous
 
14-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 431s RTU/SCADA (431s Hussar) migrate all the existing ACC points from the D20 RTU to the new SMP-4260 RTU 248 Hours
Daily
 
14-Sep-26 08:00 17-Sep-26 16:30 ALTALINK TE 185s RTU/SCADA (185s Bretville) RTU database update 80.5 Hours
Daily
 
14-Sep-26 08:00 18-Sep-26 16:00 ALTALINK TE 102s RTU/SCADA (102s Langdon) RTU outages for SCADA configuration updates involving new DLR and 77-1/175RAS protections 104 Hours
Daily
 
14-Sep-26 08:00 17-Sep-26 16:00 ENMAX Outage 5.6TR (SS-5) transformer power factor test, secondary cable test, transformer maintenance, relay fault pressure test, oil sampling MT, TC 80 Hours
Continuous
 
14-Sep-26 08:00 18-Sep-26 16:00 ALTALINK, Travers2SolarLP TE 102s Protection & Control (102s Langdon), 991s Protection & Control (991s Little Bow) protection outages for circuit cutovers and testing associated with the DLR project 104 Hours
Daily
 
14-Sep-26 08:00 18-Sep-26 16:00 ALTALINK, Travers2SolarLP TE 991s Protection & Control (991s Little Bow) protection outages for the replacement of A77-1/175RAS and B77-1/175RAS protections at 102s 104 Hours
Continuous
 
14-Sep-26 08:00 18-Sep-26 16:00 ALTALINK TE 356s Protection & Control (356s Milo) load encroachment settings changes required for DLR project 104 Hours
Daily
 
14-Sep-26 09:00 22-Sep-26 17:00 BCH RB 2L294 (BCH A. A. Lambert - BCH Cranbrook), 2L294 (BCH A. A. Lambert - BCH Nelway) tree removal 200 Hours
Continuous
AB-BC
14-Sep-26 09:30 25-Sep-26 17:00 ALTALINK, EPCOR RB 711L (113s Inland Cement - 747L tap) aerial washing program 271.5 Hours
Continuous
 
14-Sep-26 10:00 28-Sep-26 17:30 ATCO, ALTALINK Outage 830L (562s Cypress - 840s McNeill Station), 840s 901T (840s McNeill Station), 840s 701T (840s McNeill Station), 840s 701 (840s McNeill Station), 840s 901 (840s McNeill Station), 840s 702C (840s McNeill Station), 840s 703C (840s McNeill Station) replace 901T bushings, upgrading and testing 343.5 Hours
Continuous
AB-SK
14-Sep-26 10:00 20-Sep-26 11:00 ATCO Outage 739s 701T (739s Edith Lake), 739s 601 (739s Edith Lake) installation of secondary oil containment, modify cable tray, new ground rods, and insulating gravel 172 Hours
Continuous
 
14-Sep-26 10:00 17-Sep-26 17:30 ALTALINK Outage 444L (198s Blackfalds - 217s North Red Deer), 198s 444 (198s Blackfalds), 217s 444 (217s North Red Deer) replace structure 79.5 Hours
Continuous
 
14-Sep-26 10:00 28-Sep-26 17:30 Saskpower IO Sask Power S1M Line maintenance 343.5 Hours
Continuous
AB-SK
14-Sep-26 10:30 21-Sep-26 15:30 ATCO, ALTALINK RB 199L (347s AML Fox Creek - 741s ATC Fox Creek) 14 red tag pole change program 173 Hours
Continuous
 
14-Sep-26 14:00 25-Sep-26 14:00 ATCO Outage 930s Syn Condenser (930s Arcenciel), 930s 719 (930s Arcenciel), 930s 702T (930s Arcenciel) level 4 service / overhaul by ABB
- DFR replacement
343.5 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 07:30 17-Sep-26 17:30 ALTALINK, TRANSALTA Outage 33s T2 (33s Spray) testing 58 Hours
Continuous
 
15-Sep-26 07:30 17-Sep-26 12:30 ALTALINK, TRANSALTA Outage 33s T1 (33s Spray) testing 53 Hours
Continuous
 
15-Sep-26 08:00 24-Sep-26 17:00 ALTALINK, Lethbridge Outage 725AL (618s Riverbend - 725L tap), 725L (674s Bowron - 725AL tap), 725LE (111s Coalbanks - 725AL tap), 618s 725 (618s Riverbend), 111s 725LE (111s Coalbanks), 674s 725E (674s Bowron) line outage on 725LE at 674s to replace 674s12 switch and 674sPT5-CVT 225 Hours
Continuous
 
15-Sep-26 08:00 17-Sep-26 17:00 ALTALINK TE AltaLink Telecom Equipment LAN switch settings and firmware upgrade on MPLS nodes A and B, firewall upgrade
9 Hours
Continuous
 
15-Sep-26 08:00 19-Sep-26 16:00 ATCO, CNRL Outage 75-PLH-904 (838s Horizon Mining - 842s Horizon Upgrading), 838s 75-BC-1914 (838s Horizon Mining), 838s 75-BC-1913 (838s Horizon Mining), 838s 75-BC-1912 (838s Horizon Mining), 838s 903 (838s Horizon Mining), 838s 906 (838s Horizon Mining), 838s 75-SD-901 (838s Horizon Mining), 838s 75-SD-1912A (838s Horizon Mining), 838s 75-SD-1913A (838s Horizon Mining), 838s 75-SD-1913B (838s Horizon Mining), 842s 75-904A (842s Horizon Upgrading), 838s 75-SD-1914A (838s Horizon Mining) relay firmware update and testing 104 Hours
Continuous
 
15-Sep-26 08:00 19-Sep-26 16:00 ATCO, CNRL IO 838s 75-SD-901 (838s Horizon Mining), 838s 903 (838s Horizon Mining), 838s 906 (838s Horizon Mining) relay update and testing 104 Hours
Continuous
 
15-Sep-26 08:00 17-Sep-26 13:00 ALTALINK, TRANSALTA Outage 35s T2 (35s Rundle Plant) maintenance 53 Hours
Continuous
 
15-Sep-26 08:00 17-Sep-26 16:00 ALTALINK TE 312s Protection & Control (312s Fidler) PRC maintenance 56 Hours
Daily
 
15-Sep-26 08:00 17-Sep-26 16:00 ALTALINK TE AltaLink Telecom Equipment radio hop is erroring and causing issues with point 514LN_TRANS_TRIP_RX and needs to be repaired to rectify the alarm condition 56 Hours
Daily
 
15-Sep-26 08:00 17-Sep-26 18:00 ALTALINK, EXPPIPE RB 703BL (329s HRT Express - 703L tap), 703L (213s Hughenden - 703BL tap), 703L (377s AML Hardisty - 703BL tap) replace cross arms and insulation - str 22, 27, 60, 133,142,158 58 Hours
Daily
 
15-Sep-26 08:00 17-Sep-26 16:00 ALTALINK TE 328s RTU/SCADA (328s Pine Creek) RTU database update 56 Hours
Daily
 
15-Sep-26 09:00 24-Sep-26 17:30 ALTALINK, Lethbridge IO 725AL (618s Riverbend - 725L tap), 725L (111s Coalbanks - 725AL tap), 725L (674s Bowron - 725AL tap), 618s 725 (618s Riverbend) outage required to replace 674s12 - disconnect switch and 674sPT5-CVT 224.5 Hours
Continuous
 
15-Sep-26 09:00 17-Sep-26 17:00 ALTALINK Outage 535s C1 (535s Joffre) replace failed POW controller to bring breaker back to an operational state 56 Hours
Continuous
 
15-Sep-26 10:30 18-Sep-26 15:00 ALTALINK Outage 337s T1 (337s Canada Liquidair) 337s T1 testing, maintenance and leak repairs 76.5 Hours
Continuous
 
15-Sep-26 11:00 05-Nov-26 19:00 ATCO TE 888s RTU/SCADA (888s Dover) RTU updates for 9L74 protection upgrade 1,233 Hours
Continuous
 
15-Sep-26 16:01 17-Sep-26 17:00 ALTALINK Outage 283s T2 (283s Violet Grove) transformer maintenance 48.98 Hours
Continuous
 
16-Sep-26 07:00 19-Sep-26 17:00 ALTALINK, WINNIFRED RB 498L (523s Bullshead - 1054s Holsom) work on fiber optic canister on structure 169 82 Hours
Daily
 
16-Sep-26 07:30 17-Sep-26 18:30 ALTALINK RB 760L (163s Amoco Empress - 760AL tap) installing marker cones at str span 410, 411 35 Hours
Continuous
 
16-Sep-26 08:00 20-Sep-26 16:00 CNRL Outage 842s 75-TR-7701 (842s Horizon Upgrading), 842s 75-1904 (842s Horizon Upgrading), 842s 75-1905 (842s Horizon Upgrading), 842s 75-1904A (842s Horizon Upgrading), 842s 75-1905A (842s Horizon Upgrading), 842s 75-7701 (842s Horizon Upgrading) maintenance 104 Hours
Continuous
 
16-Sep-26 08:00 17-Sep-26 18:00 ATCO RB 7L760 (767s Oyen - 7LC760 tap) installing marker cones at str span 410, 411 34 Hours
Continuous
 
16-Sep-26 08:00 17-Sep-26 19:00 ATCO RB 7L128 (963s Coyote Lake - 7LA128 tap), 7L128 (802s Michichi Creek - 7LA128 tap) installing marker cones on 7L128 at str span 85 35 Hours
Continuous
 
16-Sep-26 08:00 19-Sep-26 17:00 ALTALINK TE AltaLink Telecom Equipment opening OPGW splice cannister at structure 169 of 498L 81 Hours
Daily
 
16-Sep-26 08:00 18-Sep-26 16:00 ATCO, Syncrude Outage RL2 (848s Ruth Lake - D05), T2 (D05 Syncrude), D05 78 (D05), D05 516 (D05), D05 513 (D05), D05 512 (D05), D05 509 (D05), D05 516A (D05), D05 513B (D05), D05 513A (D05), D05 512A (D05), 848s RL-2D1 (848s Ruth Lake) maintenance 56 Hours
Continuous
 
16-Sep-26 23:30 17-Sep-26 02:30 ALTALINK Outage 62s T1 (62s Brazeau Plant) maintenance 3 Hours
Continuous
 
17-Sep-26 01:30 17-Sep-26 06:00 ALTALINK TE AltaLink RTU/SCADA (AltaLink) Telus upgrading LTE 4.5 Hours
Continuous
 
17-Sep-26 03:30 17-Sep-26 06:30 ALTALINK Outage 62s T2 (62s Brazeau Plant) maintenance 3 Hours
Continuous
 
17-Sep-26 07:00 17-Sep-26 17:30 ALTALINK Outage 264s 252 (264s Elkwater) CT testing 8 Hours
Continuous
 
17-Sep-26 07:30 18-Sep-26 19:30 ATCO, ALTALINK RB 1088L (324s Cassils - 2075s Newell) installing marker cones on 9L1035/1068, str spans 4 and 8 36 Hours
Continuous
 
17-Sep-26 07:30 18-Sep-26 19:30 ATCO, ALTALINK RB 1087L (324s Cassils - 2075s Newell) installing marker cones on 9L1067/923 at str span 6 36 Hours
Continuous
 
17-Sep-26 07:30 18-Sep-26 19:30 ATCO, ALTALINK RB 923L (356s Milo - 2075s Newell) installing marker cones on 9L923/1067 at str span 6 36 Hours
Continuous
 
17-Sep-26 08:00 17-Sep-26 16:00 ALTALINK TE AltaLink Telecom Equipment split the existing SCADA VLAN from 1 to 1 and 2 8 Hours
Continuous
 
17-Sep-26 08:00 18-Sep-26 19:00 ATCO, ALTALINK RB 9L1088 (324s Cassils - 2075s Newell) installing marker cones on 9L1035/1068, str spans 4 and 8 35 Hours
Continuous
 
17-Sep-26 08:00 18-Sep-26 19:00 ATCO, ALTALINK RB 9L1087 (324s Cassils - 2075s Newell) installing marker cones on 9L1067/923 at str span 6 35 Hours
Continuous
 
17-Sep-26 08:00 18-Sep-26 19:00 ATCO, ALTALINK RB 923L (356s Milo - 2075s Newell) installing marker cones on 9L923/1067 at str span 6 35 Hours
Continuous
 
17-Sep-26 08:00 17-Sep-26 18:00 ENMAX Outage 2.81L (SS-2 - SS-9), 9.83L (SS-9 - SS-43), 9.2TR (SS-9), 9.3TR (SS-9), 9B138-2.81 (SS-9), 9B138-9.83 (SS-9), SW83 (SS-9), SW84 (SS-9), 9MD138-9.3TR (SS-9) fall substation washing 10 Hours
Continuous
 
17-Sep-26 08:00 17-Sep-26 17:30 ALTALINK Outage 332s T1 (332s Ellis) maintenance 9.5 Hours
Continuous
 
17-Sep-26 08:00 17-Sep-26 16:00 ENMAX TE Protection & Control (SS-162) 162 sub BF-1 86 protection outage - relays, lockout testing 162RLY138C60-4 8 Hours
Continuous
 
17-Sep-26 08:00 17-Sep-26 20:00 ATCO IO ATCO's system operations centre, 7L128 (802s Michichi Creek - 7LA128 tap), 7L128 (963s Coyote Lake - 7LA128 tap), 7L32 (813s Little Smoky - 862s South Bezanson) upgrading dynamic load rating server for bug fixes
12 Hours
Continuous
 
17-Sep-26 08:00 17-Sep-26 16:00 ALTALINK TE 225s Protection & Control (225s Magrath), 618s Protection & Control (618s Riverbend) MPLS maintenance 8 Hours
Continuous
 
17-Sep-26 08:30 17-Sep-26 13:00 ATCO TE ATCO Telecom Equipment IRU radio majors 4.5 Hours
Continuous
 
17-Sep-26 09:00 17-Sep-26 17:00 BCH, BPA Outage 5L51 (BPA Custer - BCH Ingledow) maintenance 8 Hours
Continuous
AB-BC
17-Sep-26 09:00 17-Sep-26 16:00 ATCO TE ATCO Telecom Equipment, 878s RTU/SCADA (878s Kidney Lake) 7750-2 integration, swapping site networking to VPLS 11 7 Hours
Continuous
 
17-Sep-26 13:00 17-Sep-26 17:00 ATCO TE ATCO Telecom Equipment, 7L106 (834s Wesley Creek - 905s Meikle), 7L131 (834s Wesley Creek - 905s Meikle) Weberville_T-Telecom/Wesley Creek_S-Telecom- IRU radio majors 4 Hours
Continuous
 
18-Sep-26 07:00 18-Sep-26 17:00 ALTALINK Outage 535s T5 (535s Joffre) cutover CT circuit from T5 and operate interposing main breaker relay for 952 (535s49) to new 138B2 relay 10 Hours
Continuous
 
18-Sep-26 07:30 18-Sep-26 17:30 ALTALINK RB 54AL (29s Cascade - 54L tap), 54L (118s Canmore - 85L tap), 54L (123s Banff - 177s West Cascade), 54L (177s West Cascade - 54AL tap), 85L (35s Rundle Plant - 54L tap) remove 474s mobile at 123s for urgent transformer testing and bushing replacement - disconnect 474s to 54L using live line technique and close open point 'A' 10 Hours
Continuous
 
18-Sep-26 08:00 18-Sep-26 18:00 ENMAX Outage 20.1TR (SS-20), 20MD138-20.1TR (SS-20), SW83 (SS-20) fall substation washing 10 Hours
Continuous
 
18-Sep-26 08:00 18-Sep-26 16:00 ALTALINK TE 149s RTU/SCADA (149s Nisku), AltaLink Telecom Equipment MPLS 7705 node firmware upgrade 8 Hours
Daily
 
18-Sep-26 08:00 18-Sep-26 16:00 ALTALINK TE 123s Protection & Control (123s Banff) settings changes to facilitate mobile removal, remove trip circuit from mobile to s551W 8 Hours
Continuous
 
18-Sep-26 08:00 18-Sep-26 18:00 ALTALINK Outage 332s T2 (332s Ellis) maintenance 10 Hours
Continuous
 
18-Sep-26 09:00 18-Sep-26 10:00 ATCO TE ATCO Telecom Equipment strome_T-Telecom- upgrading Strome tower SAR to V21, then V22 1 Hour
Continuous
 
18-Sep-26 09:00 18-Sep-26 16:00 ATCO TE ATCO Telecom Equipment, 755s Cordel radio major, radio digital constellation maintenance at Cordel 1755 E (to Paintearth) 7 Hours
Continuous
 
18-Sep-26 09:00 18-Sep-26 12:59 ALTALINK Outage 123s T2 (123s Banff) disconnect mobile 474s 3.98 Hours
Continuous
 
18-Sep-26 13:00 21-Sep-26 16:00 ALTALINK Outage 123s T2 (123s Banff) crew may not have enough time to restore settings for T2 and may need to extend T2 outage 75 Hours
Continuous
 
18-Sep-26 14:00 18-Sep-26 17:00 ALTALINK Outage 337s T1 (337s Canada Liquidair), 337s T2 (337s Canada Liquidair), 337s 746BW (337s Canadian Liquid Air) close 337s open point 'A' on the high side of T1 3 Hours
Daily
 
19-Sep-26 06:00 19-Sep-26 12:00 ENMAX, ALTALINK Outage SS-47, 771L (SS-47 - SS-162), 47.1TR (SS-47), 47.2TR (SS-47), 162B138-RB82 (SS-162), 162B138-RB81 (SS-162), 162MD138-771L (SS-162), 47B138-771/1 (SS-47), 47B138-771 (SS-47), 47B138-BT3 (SS-47), 47MD138-47.1TR (SS-47), 47MD138-47.2TR (SS-47) summer substation washing 162SUB, 138kV, 162MD138-771 5 Hours
Continuous
 
19-Sep-26 07:00 19-Sep-26 17:00 ALTALINK Outage 535s 152 (535s Joffre) cutover CT circuit from 152 (535s152), trip & breaker fail to new 138B2 relay 10 Hours
Continuous
 
19-Sep-26 07:00 27-Sep-26 18:00 ALTALINK RB 929L (74S Janet - 287s Hazelwood) work on 691L - close vicinity 203 Hours
Daily
 
19-Sep-26 07:00 27-Sep-26 18:00 ENMAX, ALTALINK RB 932L (74s Janet - SS-162) work on 691L - close vicinity 203 Hours
Daily
 
19-Sep-26 07:00 27-Sep-26 18:00 ALTALINK RB 925L (63s Red Deer - 74s Janet) work on 691L - close vicinity 203 Hours
Daily
 
19-Sep-26 07:00 27-Sep-26 18:00 ALTALINK RB 901L (74s Janet - 901AL tap) work on 691L - close vicinity 203 Hours
Daily
 
19-Sep-26 08:00 25-Sep-26 18:00 ATCO TE ATCO RTU/SCADA EMS upgrade on the SCADA system Application at both the SOC and SOC2 locations. September 20 between 09:30 – 12:30, cutover all field traffic to the new upgraded SOC2 servers. THIS WILL RESULT IN A LOSS OF ALL SCADA VISIBILITY AND CONTROL FOR UP TO 30 MINUTES. 154 Hours
Continuous
 
19-Sep-26 12:30 03-Oct-26 12:00 ENMAX Outage 20.82L (SS-20 - SS-21) Construction 20.82L River Crossing. Drill and set both South & North sides 335.5 Hours
Continuous
 
20-Sep-26 08:00 20-Sep-26 12:00 ENMAX Outage 38.3TR (SS-38), 38.1C (SS-38), 38.83L (SS-38 - SS-39), 38.1TR (SS-38) Fall Substation Washing. Reversing Switch Check - 38.3-TC 4 Hours
Continuous
 
20-Sep-26 08:00 21-Sep-26 18:00 ENMAX Outage 20.1TR (SS-20) soffit repair above transformer 34 Hours
Continuous
 
20-Sep-26 09:00 20-Sep-26 16:00 TCPL, CMH Outage Cancarb Energy Medicine Hat, MH-65L (MHS-7 Brier Park - Cancarb Energy Medicine Hat), MHS-7 MH69-709 (MHS-7 Brier Park), BKR-900 (Cancarb Energy Medicine Hat), BKR-901A (Cancarb Energy Medicine Hat) hydrovac the line due to pre-engineering of a road upgrade 7 Hours
Continuous
 
20-Sep-26 09:00 20-Sep-26 16:00 CMH Outage MH-60L (MHS-5 NE Crescent Heights - MHS-7 Brier Park), MHS-7 MH69-712 (MHS-7 Brier Park), MHS-5 MH69-514 (MHS-5 NE Crescent Heights) hydrovac for Pre-engineering of road 7 Hours
Continuous
 
20-Sep-26 12:00 20-Sep-26 18:00 ENMAX Outage 37.81L (SS-37 - SS-38), 38.2TR (SS-38), 38.3TR (SS-38), 38.1C (SS-38) Fall Substation Washing. Reversing Switch Check - 38.2-TC 6 Hours
Continuous
 
21-Sep-26 06:00 25-Sep-26 19:00 ALTALINK RB 610L (83s Taber - 336s Fincastle) install temporary understrung line, stringing wire, Fortis 83s15L is understrung on 610L 109 Hours
Daily
 
21-Sep-26 07:00 25-Sep-26 17:00 EPCOR Outage R723 (Rossdale) Rossdale: R723, Breaker Fail and DFR Cutovers and Commissioning 106 Hours
Continuous
 
21-Sep-26 07:00 21-Sep-26 17:00 ALTALINK Outage 535s T1 (535s Joffre) cutover CT circuit from T1(Tx18341) CT & operate interposing customer main breaker relay for 452 (535s20) to new 138B2 relay. 10 Hours
Continuous
 
21-Sep-26 07:00 28-Sep-26 18:00 ALTALINK Outage 691L (74s Janet - 419s Chestermere) Line move for structures 4-12. 179 Hours
Continuous
 
21-Sep-26 07:00 02-Oct-26 17:00 EPCOR TE 1055L (629s Argyll Transfer Station - 816s Petrolia), 240BA3 (629s Argyll Transfer Station - 814s Bellamy) 1055L/240BA3 - protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous
 
21-Sep-26 07:00 02-Oct-26 17:00 ALTALINK, EPCOR TE 1044L (EP 805s Jasper - 816s Petrolia) 1044L - - protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous
 
21-Sep-26 07:00 02-Oct-26 17:00 EPCOR TE 1098L (EP 805s Jasper - Poundmaker) 1098L - protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous
 
21-Sep-26 07:00 02-Oct-26 17:00 EPCOR TE 1164L (816s Petrolia - EP Riverview) 1164L - protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous
 
21-Sep-26 07:00 02-Oct-26 17:00 ALTALINK, EPCOR TE 1058L (657s Summerside - EP 803s Lambton) 1058L - protection blocking for MPLS cutovers and commissioning 274 Hours
Continuous
 
21-Sep-26 07:00 24-Sep-26 17:00 ALTALINK RB 7L230 (69s North Barrhead - 888AL tap) ATCO climbing inspection 82 Hours
Daily
 
21-Sep-26 07:00 25-Sep-26 17:00 EPCOR TE RTU/SCADA (University of Alberta) university of Alberta - RTU Outage, cutovers and commissioning 106 Hours
Continuous
 
21-Sep-26 07:00 22-Sep-26 18:00 ALTALINK RB 174L (197s Bardo - 289s Saunders Lake) replacing cross arm and insulators on 730L structure #1 35 Hours
Daily
 
21-Sep-26 08:00 24-Sep-26 16:00 SUNCOR Outage 29EDD-1 72kV North Bus (29EDD-1 Millennium) 29EDD-1 PVT 1B Low oil level and leak - 9000855432 80 Hours
Continuous
 
21-Sep-26 08:00 02-Oct-26 16:00 Syncrude Outage 34 (Aurora), 33B (Aurora), 34A (Aurora), 89-37 (Aurora), G21 (Aurora) Zone 3 6yr PM 272 Hours
Continuous
 
21-Sep-26 08:00 25-Sep-26 15:00 CMH, TCPL TE MH-65L (MHS-7 Brier Park - Cancarb Energy Medicine Hat) carry out maintenance on the LDR-65L-B. 103 Hours
Continuous
 
21-Sep-26 08:00 28-Sep-26 16:00 CNRL Outage 842s 75-1901 (842s Horizon Upgrading), 842s 75-1905 (842s Horizon Upgrading), 842s 75-1906 (842s Horizon Upgrading), 842s 75-TR-5701 (842s Horizon Upgrading), 842s 75-TR-8701 (842s Horizon Upgrading) 5YR PMs of Transformer, Breakers, Disconnects, and Protective Relays 176 Hours
Continuous
 
21-Sep-26 08:00 21-Sep-26 10:00 ATCO RB 7L16 (766s Nevis - 948s Heatburg) tap down 2000s to 7L16 2 Hours
Continuous
 
21-Sep-26 08:00 21-Sep-26 18:00 ENMAX Outage 32.83L (SS-32 - SS-40), 32.2TR (SS-32), 32.1TR (SS-32), 26.81L (SS-26 - SS-32), 32B138-32BT5 (SS-32) Fall Substation Washing 10 Hours
Continuous
 
21-Sep-26 08:00 01-Oct-26 16:00 Syncrude Outage AL-2 (Aurora - D05 Syncrude), D05 512 (D05), D05 511 (D05), 223 (Aurora), 222 (Aurora) installing a 260kV power line as a temp bypass for future work and this outage is required to tie in the OPGW running on AL-2 248 Hours
Continuous
 
21-Sep-26 08:00 04-Oct-26 19:00 ATCO RB 13L50 (2029s Heathfield - 2075s Newell) installing SVDs from str 1-775, then 975-1387 323 Hours
Continuous
 
21-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 185s RTU/SCADA (185s Bretville) RTU database update 80 Hours
Daily
 
21-Sep-26 08:00 22-Sep-26 16:00 ALTALINK TE 74s Protection & Control (74s Janet) 74s firmware upgrade and testing of the C3 B and C4 B relays 32 Hours
Daily
 
21-Sep-26 08:00 24-Sep-26 17:00 ATCO, ALTALINK RB 7L230 (743s Sarah Lake - 888AL tap) walk up and climbing inspection on 7L230 81 Hours
Continuous
 
21-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 415s RTU/SCADA (415s Drywood) RTU outage for sublan upgrade project - install new rs416 port server, update the subnet of all IEDs at the station 80 Hours
Daily
 
21-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 415s Protection & Control (415s Drywood) transformer protection outage to update IP address as part of sublan program 80 Hours
Daily
 
21-Sep-26 08:00 24-Sep-26 18:00 ALTALINK, EXPPIPE RB 703BL (329s HRT Express - 703L tap), 703L (213s Hughenden - 703BL tap), 703L (377s AML Hardisty - 703BL tap) 703L str. 22,27,60,133,142,158 to replace cross arms and insulation 82 Hours
Daily
 
21-Sep-26 08:00 24-Sep-26 16:00 ENMAX TE 2.83L (SS-5 - 2.83L tap), 5B138-2.83 (SS-5) relay protection test - 5RLY138-5.Z32, 5.Z33, lockout testing 80 Hours
Continuous
 
21-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 38s RTU/SCADA (38s East Edmonton) RTU outage for telecom upgrades 80 Hours
Daily
 
21-Sep-26 08:00 23-Sep-26 16:00 ALTALINK TE 536s RTU/SCADA (536s Brookfield) SCADA configuration updates for T1 meter upgrade 56 Hours
Daily
 
21-Sep-26 08:00 09-Oct-26 16:00 ALTALINK TE 281s RTU/SCADA (281s Johnson) SCADA configuration updates involving 417L protection upgrades for 55s P&C major project 440 Hours
Daily
 
21-Sep-26 08:00 23-Sep-26 16:00 ENMAX TE Protection & Control (SS-5) 5 sub zone 32 138 kV bus differential protection outage - relay protection test - 5RLY138-5.Z32, lockout testing 56 Hours
Continuous
 
21-Sep-26 08:00 22-Sep-26 16:00 ENMAX Outage 5.5TR (SS-5) 8 KV bus outage - make adjustments on the 5B13-5.5TR breaker due to an alignment/racking issue 32 Hours
Continuous
 
21-Sep-26 08:00 22-Sep-26 16:00 ENMAX Outage 3.3TR (SS-3) 3.3TR CT terminal block replacement 32 Hours
Continuous
 
21-Sep-26 08:00 24-Sep-26 16:00 ENMAX TE Protection & Control (SS-3) 3 sub zone 31 138 kV bus differential protection outage - CT terminal replacement commissioning 80 Hours
Daily
 
21-Sep-26 08:00 25-Sep-26 16:00 CMH Outage MHS-3 MH69-306 (MHS-3 Southridge), MH-20L (MHS-3 Southridge - MHS-6 CMH Riverview), MHS-3 MH69-T32 (MHS-3 Southridge), MHS-3 MH69-T33 (MHS-3 South Ridge), MHS-3 MH138-T34 (MHS-3 Southridge), MHS-3 MH138-317 (MHS-3 Southridge), MHS-6 MH138-T63 (MHS-6 Riverview), MHS-6 MH138-620 (MHS-6 CMH Riverview), MHS-3 MH69-302 (MHS-3 Southridge), MHS-3 MH69-314 (MHS-3 Southridge), MHS-3 MH69-316 (MHS-3 Southridge), MHS-6 MH69-611 (MHS-6 CMH Riverview), MHS-3 MH69-304 (MHS-3 Southridge), MHS-3 MH69-313 (MHS-3 Southridge) facilitate installation of lightning protection NW-3 and NW-1 at MHS-3S South Ridge substation 104 Hours
Continuous
 
21-Sep-26 08:00 21-Sep-26 12:00 ENMAX TE Protection & Control (SS-16) 16 sub Zone 21 69 kV bus differential protection -16 sub GE B30 internal battery replacement 4 Hours
Continuous
 
21-Sep-26 09:00 22-Sep-26 16:00 ATCO Outage 848s 604 (848s Ruth Lake) breaker maintenance 31 Hours
Continuous
 
21-Sep-26 09:00 23-Sep-26 12:00 ALTALINK Outage 889L (535s Joffre - 536s Brookfield), 536s T1 (536s Brookfield), 535s 106 (535s Joffre) replace VT1 at 536s Brookfield 51 Hours
Continuous
 
21-Sep-26 09:00 21-Sep-26 10:00 ATCO TE ATCO Telecom Equipment, ATC 793s RTU/SCADA (ATC 793s West Peace River) Weberville_T-Telecom work 1 Hour
Continuous
 
21-Sep-26 09:00 24-Sep-26 17:30 ALTALINK Outage 76L (33s Spray - 115s Mount Allan), 33s 76 (33s Spray) 76L structure 103 and 108 Change Arm 80.5 Hours
Continuous
 
21-Sep-26 09:00 21-Sep-26 16:00 ATCO TE ATCO Telecom Equipment, 927s RTU/SCADA (927s Buchanan Creek) 7750-2 integration, swapping site networking to VPLS 11 7 Hours
Continuous
 
21-Sep-26 09:00 22-Oct-26 08:00 ALTALINK Outage 417L (55s Olds - 281s Johnson), 281s 1152 (281s Johnson), 281s 1252 (281s Johnson) Upgrade 417L protections at 281s. 743 Hours
Continuous
 
21-Sep-26 10:00 24-Sep-26 16:00 ATCO Outage 888s 906 (888s Dover) 21B/9L74 relay replacement, cutover breaker and CT to new protection 78 Hours
Continuous
 
21-Sep-26 10:00 24-Sep-26 16:00 ATCO Outage 715s 702T (715s Leming Lake) transformer maintenance 78 Hours
Continuous
 
21-Sep-26 10:00 25-Sep-26 17:30 ALTALINK Outage 730L (197s Bardo - 732L tap) 730L Line Maintenance
103.5 Hours
Continuous
 
21-Sep-26 10:00 02-Oct-26 14:00 ATCO Outage 706s 701T (706s Irish Creek), 706s 701 (706s Irish Creek) breaker, transformer and voltage regulator maintenance 268 Hours
Continuous
 
21-Sep-26 11:00 09-Oct-26 19:00 ATCO TE 888s Protection & Control (888s Dover) Block 21B/9L74 to replace with new relay. 21A/9L74 will remain in service
In conjunction with GOI# 2-95406 Bkr 906 Sept 21-24, GOI# 2-95408 Bkr 905 Sept 25-28
Block Ras-B/9L74 because it shares CT circuits with new 21B/9L74. RAS-A/9L74 will be in service for the duration of the permit.
440 Hours
Continuous
 
21-Sep-26 11:05 21-Sep-26 14:59 ATCO Outage 743s 144kV Bus 700BS1 (743s Sarah Lake), 7L55 (743s Sarah Lake - 809s Louise Creek), 7L172 (739s Edith Lake - 743s Sarah Lake), 743s 701T (743s Sarah Lake), 743s 701 (743s Sarah Lake), 743s 704 (743s Sarah Lake), 809s 705 (809s Louise Creek), 743s 705 (743s Sarah Lake), 739s 702 (739s Edith Lake) remove jumper J1 - re-install low bus to high bus connection 3.9 Hours
Continuous
 
21-Sep-26 11:30 24-Sep-26 17:00 ALTALINK Outage 316s 752A (316s West Crossfield), 316s T1 (316s West Crossfield) 316sT1 oil leak repair SFRA, doble, WRT 77.5 Hours
Continuous
 
21-Sep-26 12:00 21-Sep-26 16:00 ENMAX TE 22.81L (SS-22 - SS-39) 22 Sub 22.81L 'A' protection outage. 22.81L L90 Replace Relay Internal Battery. Fault clearing time 5.5 cycles 4 Hours
Continuous
 
21-Sep-26 12:30 24-Sep-26 13:30 ALTALINK RB 760L (163s Amoco Empress - 760AL tap) installing interphase spacers on 7L760 live line 73 Hours
Continuous
 
21-Sep-26 13:00 24-Sep-26 13:00 ATCO RB 7L760 (767s Oyen - 7LC760 tap) installing interphase spacers on 7L760 live line 72 Hours
Continuous
 
21-Sep-26 13:00 23-Sep-26 16:00 ALTALINK TE 535s RTU/SCADA (535s Joffre) Loss of 535s visibility for up to 15 minutes to update the RTU configuration for new 138B1 & 138B2 bus relays 51 Hours
Daily
 
21-Sep-26 13:00 24-Sep-26 17:00 ALTALINK Outage 818s C1 (818s Winefred) C1 "A" protection recently failed and will be replaced like for like retro fit under urgent repair 76 Hours
Continuous
 
21-Sep-26 14:30 24-Sep-26 17:00 ALTALINK Outage 648s T1 (648s Metiskow) - VR2 Maintenance and leak repairs, 648s2011 Maintenance, 648s19 switch repair 74.5 Hours
Continuous
 
21-Sep-26 15:00 24-Sep-26 17:00 ALTALINK Outage 942L (71s Lamoureux - 681s Bannerman), 71s 1752 (71s Lamoureux), 71s 1652 (71s Lamoureux) 240kV switch repair 71s49, 71s50
240kV breaker maintenance 71s1652
74 Hours
Continuous
 
21-Sep-26 15:00 24-Sep-26 16:00 ALTALINK, EPCOR RB 920L (71s Lamoureux - 557s Castle Downs) 920LE - Altalink work 73 Hours
Continuous
 
21-Sep-26 15:01 25-Sep-26 17:00 ALTALINK Outage 77s T2 (77s Sagitawah) Transformer maintenance 100 Hours
Continuous
 
22-Sep-26 07:00 22-Sep-26 17:00 ALTALINK Outage 889L (535s Joffre - 536s Brookfield), 535s 106 (535s Joffre) Cutover CT circuit from 252 (535s106), trip & breaker fail to new 138B2 relay. 10 Hours
Continuous
 
22-Sep-26 07:00 28-Sep-26 17:00 ALTALINK Outage 233s T1 (233s Beamer) Customer Maintenance 154 Hours
Continuous
 
22-Sep-26 08:00 01-Oct-26 16:00 ATCO, CNRL Outage 838s 75-BC-1917 (838s Horizon Mining), 838s 75-BC-1916 (838s Horizon Mining), 838s 75-TR-2801 (838s Horizon Mining) Upgrade 75-RPX-2801B From SEL 387 to SEL 487, Transformer, Breaker and Disconnect testing 224 Hours
Continuous
 
22-Sep-26 08:00 22-Sep-26 18:00 ENMAX Outage 31.84L (SS-31 - SS-32), 32.3TR (SS-32), 32B138-32BT5 (SS-32) Fall Substation Washing 10 Hours
Continuous
 
22-Sep-26 08:00 22-Sep-26 16:00 ALTALINK TE AltaLink Telecom Equipment radio maintenance and repair on Calder - Lamoureaux radio 8 Hours
Daily
 
22-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 818s Winefred RTU/SCADA update FW on SMP16 and to add additional component alarms associated with C1 protection replacement 56 Hours
Daily
 
22-Sep-26 08:00 22-Sep-26 16:00 ALTALINK TE 523s RTU/SCADA (523s Bullshead) push new configuration to add points for future SCADA fault reporting project 8 Hours
Continuous
 
22-Sep-26 08:00 22-Sep-26 16:00 ALTALINK TE 678s Protection & Control (678s Okotoks) PRC maintenance 8 Hours
Continuous
 
22-Sep-26 08:00 22-Sep-26 17:00 ATCO TE ATCO Telecom Equipment LUBICON_S scheduled firmware upgrade 9 Hours
Continuous
 
22-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 415s Protection & Control (415s Drywood) protection outage to update IP address 56 Hours
Daily
 
22-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 415s Protection & Control (415s Drywood) protection outage to update ip address.T2 B protection, B87/T2 SEL-351A 56 Hours
Daily
 
22-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 415s Protection & Control (415s Drywood) protection outage to update ip adresses 56 Hours
Daily
 
22-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 415s Protection & Control (415s Drywood) protection outage to update ip address, Ge c60 breaker control module 56 Hours
Daily
 
22-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 415s Protection & Control (415s Drywood) protection outage to update ip address 56 Hours
Daily
 
22-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 415s Protection & Control (415s Drywood) protection outage to update ip adresses 56 Hours
Daily
 
22-Sep-26 08:00 23-Sep-26 17:00 ATCO TE 888s Protection & Control (888s Dover) tie in signals between 21A/9L09 and the new 21B/9L74 33 Hours
Continuous
 
22-Sep-26 08:00 22-Sep-26 16:00 ALTALINK TE 394s Protection & Control (394s Empress) PRC maintenance 8 Hours
Daily
 
22-Sep-26 08:00 24-Sep-26 16:00 ATCO TE 930s RTU/SCADA (930s Arcenciel) 930S Arcenciel synchronous condenser DFR upgrade 56 Hours
Continuous
 
22-Sep-26 08:00 22-Sep-26 16:00 ENMAX TE Protection & Control (SS-14) 14 sub 138 kV zone 31 bus differential protection outage - hazard - 14 sub Z31 69A & 69B trips not on same side 8 Hours
Continuous
 
22-Sep-26 08:00 22-Sep-26 16:00 ENMAX TE Protection & Control (SS-14) 14 sub BMR-82 protection outage, hazard - 14 sub Z31 69A & 69B trips, not on same side 8 Hours
Continuous
 
22-Sep-26 08:00 22-Sep-26 16:30 ATCO TE 977s RTU/SCADA (977s Salt Creek) SALTCREEK_S - scheduled upgrade to maintain system security and to remove any bugs on the system 8.5 Hours
Continuous
 
22-Sep-26 08:00 22-Sep-26 16:30 ATCO TE 828s RTU/SCADA (828s Sulphur Point) SULPHURPOINT_S - scheduled upgrade to maintain system security and to remove any bugs on the system 8.5 Hours
Continuous
 
22-Sep-26 09:00 22-Sep-26 10:00 ATCO TE ATCO Telecom Equipment, 738s RTU/SCADA (738s Virginia Hills) Virginia Hills_T-Telecom - upgrading Virginia Hills tower 'A' SAR OS to V21, then V22 1 Hour
Continuous
 
22-Sep-26 09:00 22-Sep-26 10:30 ATCO TE ATCO Telecom Equipment upgrading NEWELL_DC 'A' & NEWELL DC 'B' SARS to V21, then V22 1.5 Hours
Continuous
 
22-Sep-26 09:00 23-Sep-26 17:00 ATCO TE ATCO Telecom Equipment Crystal Lake_S-Telecom 32 Hours
Continuous
 
22-Sep-26 09:00 22-Sep-26 16:00 ATCO TE ATCO Telecom Equipment, 892s RTU/SCADA (892s Ribstone Creek) 7750-2 integration, VPLS 11 work Ribstone_S and Fleet tower 7 Hours
Continuous
 
22-Sep-26 09:00 23-Sep-26 17:00 ATCO TE ATCO Telecom Equipment replacement of SAR A SDI cards, slot 1.3, 1.4 32 Hours
Continuous
 
22-Sep-26 09:00 19-Oct-26 17:00 ATCO TE 743s Protection & Control (743s Sarah Lake) CSP needed for 86-94/700BS1 to test protection logic for breaker 702 656 Hours
Continuous
 
22-Sep-26 09:00 19-Oct-26 17:00 ATCO TE 743s Protection & Control (743s Sarah Lake) 21B/7L67 relay testing and wiring 656 Hours
Continuous
 
22-Sep-26 09:00 19-Oct-26 17:00 ATCO TE 743s Protection & Control (743s Sarah Lake) 50BF/702 relay testing and wiring 656 Hours
Continuous
 
22-Sep-26 09:00 22-Sep-26 16:00 ATCO TE ATCO Telecom Equipment Daishowa_S-Telecom- 7750-2 integration, swapping site networking to VPLS 11 7 Hours
Continuous
 
22-Sep-26 09:30 22-Sep-26 17:00 ATCO TE ATCO Telecom Equipment, 705s RTU/SCADA (705s Kitscoty) radio maintenance 7.5 Hours
Continuous
 
22-Sep-26 10:00 23-Sep-26 11:55 ATCO, ALTALINK Outage 743s 144kV Bus 700BS2 (743s Sarah Lake), 743s 702 (743s Sarah Lake), 743s 703 (743s Sarah Lake), 7L67 (743s Sarah Lake - 824s Fieldgate), 7L230 (743s Sarah Lake - 888AL tap) Create Jumper J2 - lower bus to upper bus connection. Remove OHSW from breaker bay 702 25.92 Hours
Continuous
 
22-Sep-26 10:00 28-Sep-26 14:00 ATCO Outage 739s 702T (739s Edith Lake) replace and upgrade - oil containment, cable tray, ground rods, and insulating gravel 148 Hours
Continuous
 
22-Sep-26 10:00 22-Sep-26 16:00 ATCO TE 715s Protection & Control (715s Leming Lake) update password on 715S 7L91 A protection relay 6 Hours
Continuous
 
22-Sep-26 13:30 22-Sep-26 18:00 ALTALINK Outage 452L (367s Harry Smith - 434s Stony Plain), 434s 452 (434s Stony Plain) trip testing from new T3 protections 4.5 Hours
Daily
 
23-Sep-26 07:30 23-Sep-26 14:00 ALTALINK Outage 790L (434s Stony Plain - 790AL tap), 434s 790 (434s Stony Plain) trip testing from new T3 protections 6.5 Hours
Daily
 
23-Sep-26 08:00 23-Sep-26 16:00 ENMAX Outage 14.1C (SS-14), 14.2C (SS-14), 14.83L (SS-14 - SS-36), 14.4TR (SS-14), 14.2TR (SS-14) Fall Substation Washing 8 Hours
Continuous
 
23-Sep-26 08:00 23-Sep-26 16:00 ALTALINK TE 312s Protection & Control (312s Fidler) outage required to install temp settings in the morning and revert to standard settings in the afternoon when ATCO is completed their work. 8 Hours
Daily
 
23-Sep-26 08:00 23-Sep-26 16:00 ALTALINK, WINDYPWPL TE 112s Protection & Control (112s Windy Point) 'outage required to install temp settings in the morning and revert to standard settings in the afternoon when ATCO is completed their work on the listed line protections 8 Hours
Daily
 
23-Sep-26 08:00 25-Sep-26 18:00 ATCO Outage 806s 701T (806s Oldman River) maintenance 34 Hours
Continuous
 
23-Sep-26 08:00 23-Sep-26 16:00 ALTALINK TE 185s Protection & Control (185s Bretville) settings change 8 Hours
Daily
 
23-Sep-26 08:00 23-Sep-26 17:00 ATCO TE ATCO Telecom Equipment Whitby Lake_S-Telecom - both firewalls at the Whitby Lake_S will undergo a scheduled firmware upgrade 9 Hours
Continuous
 
23-Sep-26 08:00 24-Sep-26 17:00 ALTALINK TE 83s Protection & Control (83s Taber) test trips to new 83s263E 33 Hours
Daily
 
23-Sep-26 08:00 23-Sep-26 17:00 ALTALINK TE 331s RTU/SCADA (331s Ponoka), AltaLink Telecom Equipment firmware upgrade MPLS node A 9 Hours
Daily
 
23-Sep-26 08:00 23-Sep-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
 
23-Sep-26 08:00 09-Oct-26 17:00 ATCO RB 12L44 (939s Livock - 951s Thickwood Hills) installing replacement corona rings on 12L44 due to failure, replacement warranty 393 Hours
Continuous
 
23-Sep-26 08:00 24-Sep-26 16:00 ENMAX Outage 3.4TR (SS-3) 3.4TR CT terminal block replacement 32 Hours
Continuous
 
23-Sep-26 08:00 23-Sep-26 16:30 ATCO TE 844s RTU/SCADA (844s AEC Mill) AECMILL_S - scheduled upgrade to maintain system security and to remove any bugs on the system 8.5 Hours
Continuous
 
23-Sep-26 08:00 23-Sep-26 16:30 ATCO TE 804s RTU/SCADA (804s Wintering Hills) Wintering Hills_S - scheduled upgrade to maintain system security and to remove any bugs on the system 8.5 Hours
Continuous
 
23-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE AltaLink Telecom Equipment ATCO UPS replacement. 806s SPV, 893L (312s-806s) & 893L (112s-806s) TPR A&B, ATCO EPIPE will be OOS for 2 days. All other TPR ccts will be rerouted in 50ms. 806s Will be out of service. 32 Hours
Continuous
 
23-Sep-26 08:00 23-Sep-26 16:00 ALTALINK TE 312s Protection & Control (312s Fidler) 'outage required to install temp settings in the morning and revert to standard settings in the afternoon on the line protections listed.
Protections are redundant and this work is related to ATCO UPS work at 806s. No AltaLink equipment at 806s in CROW.
8 Hours
Daily
 
23-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE AltaLink Telecom Equipment assist with ATCO's planned UPS replacement work of AltaLink Telecom equipment. 32 Hours
Daily
 
23-Sep-26 09:00 24-Sep-26 16:00 ATCO Outage 848s 605 (848s Ruth Lake) breaker maintenance 31 Hours
Continuous
 
23-Sep-26 09:00 23-Sep-26 17:00 ALTALINK, WPLP Outage 268s 268 (268s Whitecourt), 268s 503 (268s Whitecourt), 503L (268s Whitecourt - 323s Whitecourt Power) 268s268 breaker maint. and heater replacement 8 Hours
Daily
 
23-Sep-26 09:00 23-Sep-26 16:00 ATCO TE ATCO Telecom Equipment, 861s RTU/SCADA (861s Eureka River) 7750-2 integration, swapping site networking to VPLS 11 7 Hours
Continuous
 
23-Sep-26 09:00 23-Sep-26 17:00 CNRL TE 1034s RTU/SCADA (1034s Margie) revenue meters are obsolete and end of life and have to be replaced 8 Hours
Continuous
 
23-Sep-26 12:00 19-Oct-26 11:00 ATCO Outage 7L67 (743s Sarah Lake - 824s Fieldgate), 743s 702 (743s Sarah Lake), 743s 702A (743s Sarah Lake) 743S Sarah lake rebuild. replace bkr 702, gang switches 702A, 7L67D2 623 Hours
Continuous
 
23-Sep-26 12:00 26-Sep-26 17:00 ALTALINK, ATCO Outage 510s R3 (510s Sunnybrook), 510s 2952 (510s Sunnybrook), 510s 2852 (510s Sunnybrook), 12L41 (510s Sunnybrook - 939s Livock) reactor maintenance, LA replacement 75 Hours
Continuous
 
23-Sep-26 12:00 26-Sep-26 17:00 ATCO, ALTALINK IO 12L41 (510s Sunnybrook - 939s Livock) AltaLink is planning work at 510s Sunnybrook and require a recloser block from ATCO on 1241L. 77 Hours
Continuous
 
24-Sep-26 07:30 27-Sep-26 16:30 ATCO, ALTALINK RB 950L (132s Ware Junction - 801s Anderson) installing aerial marker on 9L950 at str spans 212, 213 ATCO 81 Hours
Daily
 
24-Sep-26 08:00 05-Oct-26 18:00 SUNCOR Outage 29EDD-63 29PT-179 (29EDD-63 Firebag Co-Gen), 29PL7-2 (29EDD-18 Firebag - 29EDD-63), 29EDD-63 30-252-11301 (29EDD-63), 29EDD-63 91-152-500201 (29EDD-63), 29EDD-18 29-752-105 (29EDD-18 Firebag), 29EDD-18 29-752-104 (29EDD-18 Firebag) replace air bladder and 29PT-179 T60 replacement 346 Hours
Continuous
 
24-Sep-26 08:00 27-Sep-26 16:00 ATCO, ALTALINK RB 9L950 (132s Ware Junction - 801s Anderson) installing aerial marker on 9L950 at str spans 212, 213 80 Hours
Continuous
 
24-Sep-26 08:00 24-Sep-26 18:00 ENMAX Outage 11.81L (SS-11 - SS-13), 11.4TR (SS-11), 11.1TR (SS-11), 11B138-11.81 (SS-11), 11B138-BT5 (SS-11), SW83 (SS-11) fall substation washing 10 Hours
Continuous
 
24-Sep-26 08:00 24-Sep-26 16:00 ATCO TE ATCO Telecom Equipment Thornton_S – Telecom - bringing new fiber link to 845s Big mountain on line, site switch updates 8 Hours
Continuous
 
24-Sep-26 08:00 24-Sep-26 16:00 ATCO RB 7L128 (963s Coyote Lake - 7LA128 tap), 7L128 (802s Michichi Creek - 7LA128 tap) deficiency repair on 7L128 structures 182 and 183 28 Hours
Continuous
 
24-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 312s Protection & Control (312s Fidler) 312s revert settings back to their original settings on the lines listed - 893L (L9) line prot, 893L (L9) line prot 8 Hours
Continuous
 
24-Sep-26 08:00 24-Sep-26 16:00 ALTALINK, WINDYPWPL TE 112s Protection & Control (112s Windy Point) protection outage to revert settings back to original settings 8 Hours
Continuous
 
24-Sep-26 08:00 24-Sep-26 16:00 ENMAX TE Protection & Control (SS-5) 5 Sub Zone 33 138kV Bus Differential Protection outage. Back-up fault clearing time 26.5 cycles. Relays, Lockout Testing 5RLY138-Z33 8 Hours
Continuous
 
24-Sep-26 08:00 24-Sep-26 17:00 ALTALINK TE 288s RTU/SCADA (288s Wolf Creek), AltaLink Telecom Equipment MPLS node maintenance 9 Hours
Daily
 
24-Sep-26 08:00 25-Sep-26 16:00 ALTALINK TE AltaLink Telecom Equipment MPLS maintenance and upgrade 32 Hours
Daily
 
24-Sep-26 08:00 24-Sep-26 16:00 ALTALINK TE 312s Protection & Control (312s Fidler) revert line settings changes back to original settings 8 Hours
Continuous
 
24-Sep-26 09:00 24-Sep-26 16:00 BCH, BPA Outage 5L52 (BPA Custer - BCH Ingledow) end to end trip checks, BC Maintenance does not affect the Alberta ATC 7 Hours
Continuous
AB-BC
24-Sep-26 09:00 24-Sep-26 16:00 ATCO TE 869s RTU/SCADA (869s Seal Lake), ATCO Telecom Equipment 7750-2 integration, swapping site networking to VPLS 11 7 Hours
Continuous
 
24-Sep-26 09:00 24-Sep-26 14:00 Saskpower Outage Sask Power AS905 maintenance 5 Hours
Continuous
AB-SK
24-Sep-26 10:00 24-Sep-26 16:00 ATCO TE ATCO Telecom Equipment 7750-2 integration, swapping site networking to VPLS 11 6 Hours
Continuous
 
25-Sep-26 07:00 25-Sep-26 19:00 ALTALINK Outage 149s 455 (149s Nisku), 149s 3 (149s Nisku), 149s C1 (149s Nisku), 149s 1 (149s Nisku), 149s T1 (149s Nisku), 149s 138kV North Bus (149s Nisku) Cut existing T1, 149s1, 149s11, 149s22 free from 138kV and 25kV Bus 12 Hours
Continuous
 
25-Sep-26 08:00 25-Sep-26 12:00 ENMAX Outage 13.82L (SS-13 - SS-22), 22.3TR (SS-22), 22.1TR (SS-22), 22B138-22BT8 (SS-22) Fall Substation Washing 4 Hours
Continuous
 
25-Sep-26 08:00 25-Sep-26 12:00 ENMAX Outage 1.84L (SS-1 - SS-5), 5B138-1.84 (SS-5) Breaker Trip Circuit Test - 5B138-1.84 4 Hours
Continuous
 
25-Sep-26 08:00 25-Sep-26 16:00 ATCO RB 7L80 (733s Simonette - 857s Kakwa Ridge), 7L80 (740s H.R. Milner - 857s Kakwa Ridge) high load hot lift required 8 Hours
Continuous
 
25-Sep-26 08:00 05-Oct-26 16:00 ALTALINK TE 149s RTU/SCADA (149s Nisku) add new transformer alarms for T1 (TX 18363) 248 Hours
Daily
 
25-Sep-26 09:00 25-Sep-26 16:00 ATCO TE 886s RTU/SCADA (886s Updike), ATCO Telecom Equipment 7750-2 integration, swapping site networking to VPLS 11 7 Hours
Continuous
 
25-Sep-26 10:00 28-Sep-26 16:00 ATCO Outage 888s 905 (888s Dover) 21B/9L74 relay replacement. Cutover breaker and CT to new protection 78 Hours
Continuous
 
25-Sep-26 12:00 25-Sep-26 18:00 ENMAX Outage 22.81L (SS-22 - SS-39), 22.2TR (SS-22), 22B138-22BT8 (SS-22) Fall Substation Washing 6 Hours
Continuous
 
25-Sep-26 12:00 25-Sep-26 16:00 ENMAX Outage 1.82L (SS-1 - SS-5), 5B138-1.82 (SS-5) Breaker Trip Circuit Test - 5B138-1.82 4 Hours
Continuous
 
25-Sep-26 16:00 02-Oct-26 07:00 ALTALINK Outage 149s T1 (149s Nisku) Move s1, s11, s22 to new T1 location 159 Hours
Continuous
 

Prepared On:   2026-09-16   11:46:27

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

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