Alberta Electric System Operator
System Co-ordination Plan
2026-03-28 to 2026-04-03
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		  
20-Mar-25 08:00 29-May-26 17:00 ALTALINK Outage 256s C1 (256s Harmattan) forced outage 435.38 Days
Continuous		  
31-Mar-25 07:00 01-May-26 17:00 EPCOR TE Protection & Control (Woodcroft) Woodcroft: protection blocking for merging unit and protection upgrade. 396.42 Days
Continuous		  
25-Jul-25 17:01 17-Apr-26 17:00 EPCOR Outage T2 (EP Riverview) bushing test failure (found during OE110184) 266 Days
Continuous		  
12-Sep-25 08:00 19-Jun-26 16:00 ENMAX Outage 33.1TR (SS-33) tap changer refurbishments. soak test required 280.33 Days
Continuous		  
25-Nov-25 17:46 18-Sep-26 18:00 ATCO Outage 876s 901T (876s Brintnell) forced outage oil leaking 296.97 Days
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 730.33 Days
Daily		  
04-Jan-26 08:00 02-Sep-26 16:00 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 241.29 Days
Continuous		  
08-Jan-26 15:00 30-Mar-26 14:00 ALTALINK Outage 42s C2 (42s Sarcee) forced outage 80.92 Days
Daily		  
12-Jan-26 07:00 03-Jul-26 17:00 EPCOR TE 330p Protection & Control (330p Genesee) protect blocking, annual relay maintenance and password changes 172.38 Days
Continuous		  
12-Jan-26 07:00 01-May-26 17:00 EPCOR TE Protection & Control (Rossdale) protection blocking, relay maintenance 109.38 Days
Continuous		  
12-Jan-26 07:00 03-Apr-26 17:00 EPCOR TE 987s Protection & Control (987s Clover Bar) protection blocking, relay maintenance 81.38 Days
Continuous		  
17-Jan-26 11:00 30-Apr-26 17:00 BHE Canada Outage 120s C2 (120s Picture Butte) forced outage 103.21 Days
Continuous		  
21-Jan-26 08:00 30-Oct-26 16:00 ENMAX Outage 5.7TR (SS-5) 25kV switchgear replacement 282.29 Days
Continuous		  
03-Feb-26 09:00 30-Jun-26 17:00 ATCO TE 972s RTU/SCADA (972s Tinchebray) config changes needed throughout the CETO project 147.29 Days
Continuous		  
06-Feb-26 07:00 30-Mar-26 17:30 ALTALINK RB 793L (87s Gaetz - 535s Joffre) crews will be setting structures on 986L/962L STR’s 41-56 & 24-41 and will require a Reclosure Block on
793L		 52.4 Days
Daily		  
08-Feb-26 07:00 06-Apr-26 18:00 ALTALINK Outage 799L (235s Entwistle - 443s South Mayerthorpe), 235s 799N (235s Entwistle) 799L rebuild between Str 721B-758 (Section B) 57.42 Days
Continuous		  
09-Feb-26 09:00 26-Jun-26 17:00 ATCO TE 972s Protection & Control (972s Tinchebray) block all 50BF protection until cutovers and associated commissioning are complete 137.29 Days
Continuous		  
17-Feb-26 12:00 09-Apr-26 13:31 ATCO TE 882s RTU/SCADA (882s Triangle) updating RTU/station controller configuration during SCADA upgrade project 51.02 Days
Continuous		  
06-Mar-26 17:00 13-Nov-26 17:00 EPCOR Outage T1 (Woodcroft) woodcroft: TX1 LCR civil 252 Days
Continuous		  
10-Mar-26 09:00 14-Apr-26 17:00 ATCO Outage 972s 240kV Bus 900BS2 (972s Tinchebray), 972s 903 (972s Tinchebray) install breakers 905/906, 905CT/906CT, switches 905A/906B
 35.33 Days
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 265.33 Days
Continuous		  
11-Mar-26 13:45 31-Mar-26 16:00 ALTALINK Outage 535s C1 (535s Joffre) breaker maintenance 20.09 Days
Continuous		  
13-Mar-26 16:00 24-Apr-26 17:00 ATCO Outage 7L122 (791s Rainbow Lake - 930s Arcenciel), 791s 701 (791s Rainbow Lake) phase replacement 42.04 Days
Continuous		  
14-Mar-26 07:00 30-Mar-26 17:00 EPCOR Outage 330p 500kV Bus 1 (330p Genesee), 330P 12TC1 (330p Genesee), 330p 1207 (330p Genesee), 330p 1204 (330p Genesee), 330p 1201 (330p Genesee), 330p 1210 (330p Genesee), 330p 1214 (330p Genesee), 330p 12TC1D (330p Genesee), 330p 805 (330p Genesee) POW project installation 16.42 Days
Continuous		  
15-Mar-26 07:00 01-Apr-26 17:00 EPCOR Outage 330p 1211 (330p Genesee), 330p 1210 (330p Genesee) POW project installation 17.42 Days
Continuous		  
15-Mar-26 07:00 01-Apr-26 17:00 EPCOR Outage 330P GT6 (330p Genesee) maintenance and POW project installation 17.42 Days
Continuous		  
16-Mar-26 07:00 01-Apr-26 17:00 EPCOR Outage 987s GT1 (987s Clover Bar), 987s CGB1 (987s Clover Bar) maintenance 16.42 Days
Continuous		  
16-Mar-26 07:30 16-Apr-26 15:30 CMH TE MHS-2 RTU/SCADA (MHS-2 North Industrial) replacement of existing Axiom Scout RTAC with SEL 3350 RTAC. 31.33 Days
Continuous		  
16-Mar-26 09:00 31-Mar-26 17:00 ALTALINK Outage 773L (127s Bruderheim - 308s Albchem Beaverhill Creek), 308s 773E (308s Albchem Beaverhill Creek), 127s 773W (127s Bruderheim) CT replacement associated with 308s773E. 15.33 Days
Continuous		  
16-Mar-26 13:00 30-Mar-26 17:00 ATCO TE 882s Protection & Control (882s Triangle) Block 701T protection to test trip/close of breaker 503 and to test inter-relay signals to new 5L482 relay 14.17 Days
Continuous		  
22-Mar-26 07:00 02-Apr-26 17:00 EPCOR Outage 72JW19 (EP 805s Jasper - Woodcroft), T1 (Woodcroft), W721 (Woodcroft), W722 (Woodcroft), EP 805s J724 (EP 805s Jasper), WAB1 (Woodcroft), EP 805s JDS28 (EP 805s Jasper) Woodcroft - TX1 LCR civil (pile installs) 11.42 Days
Continuous		  
22-Mar-26 13:00 15-Apr-26 17:00 BHE Canada Outage 120s C1 (120s Picture Butte) forced outage 24.17 Days
Continuous		  
23-Mar-26 07:00 28-Mar-26 16:00 ALTALINK TE 28s RTU/SCADA (28s West Brooks) add new ACC alarms 5.38 Days
Continuous		  
23-Mar-26 08:00 31-Mar-26 16:00 ATCO Outage 7L48 (794s Valleyview - 7LA48 tap), 794s 703 (794s Valleyview) pole and cross arm replacement from T&T 8.33 Days
Continuous		  
23-Mar-26 08:00 06-Apr-26 16:00 ATCO, ALTALINK Outage 199L (347s AML Fox Creek - 741s ATC Fox Creek), 347s 199W (347s AML Fox Creek), 741s 702 (741s ATC Fox Creek) breaker replacement 14.33 Days
Continuous		  
23-Mar-26 08:00 29-Mar-26 17:00 ATCO, USPCE RB 7L15 (841s Long Lake - 856s Kinosis) complete 7L15 pole changes, live line work 6.38 Days
Daily		  
23-Mar-26 10:00 29-Mar-26 17:00 ATCO RB 7L08 (830s Carmon - 834s Wesley Creek) maintenance program, 32 pole changes, 21 crossarm changes, other structure deficiencies 6.29 Days
Continuous		  
24-Mar-26 08:00 29-Mar-26 17:00 ALTALINK Outage 747L (99s North St. Albert - 711L tap), 99s 747X (99s North St. Albert) replace/relocate structures 62 to 69 5.38 Days
Continuous		  
24-Mar-26 08:00 02-Apr-26 15:00 CMH TE MHS-7 Protection & Control (MHS-7 Brier Park) PRC-005 testing - remove TPR-138-T71-B from service to complete element, functional 9.29 Days
Continuous		  
26-Mar-26 02:00 03-Apr-26 17:00 ALTALINK Outage 937L (5s East Calgary - 102s Langdon), 102s 6452 (102s Langdon), 102s 6552 (102s Langdon) forced outage -- PT exploded 8.63 Days
Continuous		  
27-Mar-26 07:00 01-Apr-26 16:00 ALTALINK TE 347s RTU/SCADA (347s Fox Creek) add new ACC alarms for s199W breaker 5.38 Days
Continuous		  
28-Mar-26 07:00 28-Mar-26 17:00 EPCOR TE 657s RTU/SCADA (657s Summerside) RTU outage, . substation firewall replacement – Full communications outage 10 Hours
Continuous		  
28-Mar-26 08:00 28-Mar-26 16:00 ENMAX TE Protection & Control (SS-65) 65 sub 86BF D81 lockout relay protection outage - relays, lockout testing 65RLY138-D81 8 Hours
Continuous		  
28-Mar-26 08:00 29-Mar-26 16:00 ENMAX TE Protection & Control (SS-36) 36 sub autoswitching protection outage - install isolations for 36 sub C30 relay 1.33 Days
Daily		  
28-Mar-26 12:00 14-May-26 17:00 ATCO TE 833s RTU/SCADA (833s Mariana) updating RTU/station controller configuration during SCADA upgrade project 47.21 Days
Continuous		  
28-Mar-26 12:30 28-Mar-26 14:30 ALTALINK, BCH TE 5L94 (BCH Cranbrook - 520s Bennett) BPA annual RAS signal testing 2 Hours
Continuous		 AB-BC
28-Mar-26 12:30 28-Mar-26 14:30 ALTALINK TE 520s Protection & Control (520s Bennett) BPA annual RAS testing, 5L94 trip testing (signal check only no tripping) 2 Hours
Continuous		  
30-Mar-26 07:00 02-Apr-26 17:00 EPCOR Outage 987s T3 (987s Clover Bar), 987s C2407 (987s Clover Bar) breaker maintenance and TX3 relay maintenance 3.42 Days
Continuous		  
30-Mar-26 07:00 31-Mar-26 17:00 EPCOR Outage 805s T1 (805s Jasper), 805s C1 (805s Jasper), EP 805s J2401 (EP 805s Jasper), EP 805s J2403 (EP 805s Jasper), EP 805s J724 (EP 805s Jasper), EP 805s J722 (EP 805s Jasper), 72JW19 (EP 805s Jasper - Woodcroft), 72JM18 (EP 805s Jasper - Meadowlark), EP 805s JDS28 (EP 805s Jasper), EP 805s JDS29 (EP 805s Jasper), M721 (Meadowlark), EP 805s JAB1 (EP 805s Jasper), EP 805s JAB5 (EP 805s Jasper), W721 (Woodcroft) Jasper TX1, cap bank relay maintenance, JDS21 repair 1.42 Days
Continuous		  
30-Mar-26 07:00 08-Apr-26 18:00 ALTALINK Outage 914L (86s Bigstone - 87s Gaetz), 87s 240kV East Bus (87s Gaetz), 87s T2 (87s Gaetz), 87s 2352 (87s Gaetz), 87s 1252 (87s Gaetz), 87s 1652 (87s Gaetz), 87s 1952 (87s Gaetz), 87s 1352 (87s Gaetz), 87s 1552 (87s Gaetz) installing new 87s1352 & 87s1552, closing open points 'E', 'J', 'K' & 'L', creating permanent bus cut between 87s27 & 87s 240kV East bus 9.46 Days
Continuous		  
30-Mar-26 07:00 03-Apr-26 17:00 EPCOR Outage RR723 (Rossdale) Rossdale RR723 breaker fail upgrade project 4.42 Days
Continuous		  
30-Mar-26 07:00 31-Mar-26 17:00 EPCOR TE 72PM25 (Poundmaker - Meadowlark) PM25 protection blocking, SOM module replacement 1.42 Days
Continuous		  
30-Mar-26 07:00 02-Apr-26 17:00 ALTALINK TE 87s RTU/SCADA (87s Gaetz) SCADA change for CETO project 3.42 Days
Continuous		  
30-Mar-26 07:00 01-Apr-26 17:00 EPCOR TE EP 803s RTU/SCADA (EP 803s Lambton) RTU/SCADA maintenance 2.42 Days
Continuous		  
30-Mar-26 07:30 01-Apr-26 17:30 ALTALINK RB 615L (104s Watson Creek - 602s Cold Creek) component replacement structure 82-84 2.42 Days
Daily		  
30-Mar-26 08:00 01-Apr-26 17:00 ATCO, ALTALINK Outage 7L50 (757s Battle River - 491L tap), 757s 709 (757s Battle River) reeplace structure 7L50-235 2.38 Days
Continuous		  
30-Mar-26 08:00 30-Mar-26 11:00 ENMAX Outage 9.83L (SS-9 - SS-43), 9B138-9.83 (SS-9), 43B138-9.83 (SS-43) spring pothead washing 3 Hours
Continuous		  
30-Mar-26 08:00 30-Mar-26 16:00 ENMAX, ALTALINK RB 21.80L (42s Sarcee - SS-21) spring transmission line washing 8 Hours
Continuous		  
30-Mar-26 08:00 08-Apr-26 16:00 ALTALINK TE 87s Protection & Control (87s Gaetz) relay setting and wiring changes to A87/W138B & B87/W138B 9.33 Days
Continuous		  
30-Mar-26 08:00 08-Apr-26 16:00 ALTALINK TE 87s Protection & Control (87s Gaetz) relay setting and wiring changes to A87/W240B & B87/W240B 9.33 Days
Continuous		  
30-Mar-26 08:00 08-Apr-26 16:00 ALTALINK TE 87s Protection & Control (87s Gaetz) relay setting and wiring changes to A87/E138B & B87/E138B 9.33 Days
Continuous		  
30-Mar-26 08:00 30-Mar-26 16:00 ENMAX, ALTALINK RB 21.80L (42s Sarcee - SS-21) spring transmission line washing 8 Hours
Continuous		  
30-Mar-26 08:00 30-Mar-26 17:00 ALTALINK RB 615L (104s Watson Creek - 602s Cold Creek) component replacement structure 82-84 9 Hours
Continuous		  
30-Mar-26 08:00 01-Apr-26 17:00 ALTALINK, CHDI RB 514BL (322s Cowley Ridge Windplant - 514L tap), 514L (396s Pincher Creek - 514BL tap), 514L (513s Lundbreck - 514BL tap) component replacement 2.38 Days
Continuous		  
30-Mar-26 08:00 02-Apr-26 16:00 ALTALINK Outage 726L (37s North Calder - 71s Lamoureux), 37s 726E (37s North Calder) p&c upgrades (37s726E) 3.33 Days
Continuous		  
30-Mar-26 08:00 30-Mar-26 14:00 ALTALINK Outage 37s 138kV Bus (37s North Calder), 898L (37s North Calder - 92s Viscount), 747L (37s North Calder - 711L tap), 37s T3 (37s North Calder), 37s 747W (37s North Calder), 37s 726E (37s North Calder), 37s 898 (37s North Calder), 37s 12 (37s North Calder) 37s 138kV bus outage for p&c upgrades to PT1 (37s8) 6 Hours
Continuous		  
30-Mar-26 08:00 01-Apr-26 16:00 ENMAX Outage 162.3TR (SS-162) relay protection test - 162RLY138-162.3TR A GE, 162RLY138-162.3TR S SEL, reversing switch check 2.33 Days
Continuous		  
30-Mar-26 08:00 03-Apr-26 17:00 ALTALINK TE 37s RTU/SCADA (37s North Calder) RTU database updates 4.38 Days
Continuous		  
30-Mar-26 08:00 08-Apr-26 16:00 ALTALINK TE 87s Protection & Control (87s Gaetz) reconfiguration of the B DC chain fed from B8-4 9.33 Days
Continuous		  
30-Mar-26 08:00 30-Mar-26 16:00 ALTALINK TE 37s Protection & Control (37s North Calder) P&C protection upgrades 8 Hours
Continuous		  
30-Mar-26 08:00 31-Mar-26 16:00 ENMAX Outage 34.1TR (SS-34) tap changer inspection - 34.1-TC, reversing switch check, oil sampling MT, TC 1.33 Days
Continuous		  
30-Mar-26 08:30 04-May-26 16:30 ALTALINK Outage 62s T1 (62s Brazeau Plant), 62s 1 (62s Brazeau Plant) maintenance 35.33 Days
Continuous		  
30-Mar-26 09:00 09-Apr-26 17:00 Lethbridge Outage 823L (146s MacDonald - 593s Lakeview), 146s T2 (146s Macdonald), 146s 823L (146s Macdonald), 593s 823L (593s Lakeview), 146s 9 (146s Macdonald) replace switch 10.33 Days
Continuous		  
30-Mar-26 09:00 15-Apr-26 17:00 BCH RB 2L294 (BCH A. A. Lambert - BCH Cranbrook), 2L294 (BCH A. A. Lambert - BCH Nelway) ANRP for tree removal 16.33 Days
Continuous		 AB-BC
30-Mar-26 12:00 02-Apr-26 16:00 ATCO TE 898s Protection & Control (898s Heart Lake) PRC-005 relay testing, relay software vulnerability upgrades
3.17 Days
Continuous		  
30-Mar-26 13:00 02-Apr-26 16:00 ALTALINK Outage 430s 652 (430s Ursus) 430s652 CT replacement 3.13 Days
Continuous		  
30-Mar-26 13:30 03-Apr-26 18:00 ALTALINK, EPCOR RB 1045L (EP 805s Jasper - 1045AL tap) Altalink - CT replacement for 320p 1352 4.19 Days
Continuous		  
30-Mar-26 14:01 01-Apr-26 16:00 ALTALINK Outage 42s C2 (42s Sarcee), 42s C3 (42s Sarcee) 42s C2/C3 - complete repair to 42sC2 re-energize once work is completed, replace the damaged capacitors and associated testing 2.08 Days
Continuous		  
30-Mar-26 15:00 01-Apr-26 16:00 ALTALINK Outage 71s 252 (71s Lamoureux) PRC5 breaker maintenance & first trip 2.04 Days
Continuous		  
31-Mar-26 07:00 07-Apr-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) 50BF/701, 50BF/702, 50BF/703, 50BF/704 for relay testing 7.44 Days
Continuous		  
31-Mar-26 07:00 07-Apr-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) relay settings change for 51HV/701T 7.44 Days
Continuous		  
31-Mar-26 07:00 07-Apr-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) relay settings for 51MV/701T 7.44 Days
Continuous		  
31-Mar-26 07:00 31-Mar-26 17:00 EPCOR TE 805s RTU/SCADA (805s Jasper) Jasper: RTU/COMMS outage for emergency switch repair 10 Hours
Continuous		  
31-Mar-26 08:00 31-Mar-26 16:00 ENMAX RB 9.83L (SS-9 - SS-43) spring transmission line washing 8 Hours
Continuous		  
31-Mar-26 08:00 31-Mar-26 16:00 ENMAX RB 20.82L (SS-20 - SS-21) spring transmission line washing 8 Hours
Continuous		  
31-Mar-26 08:00 03-Apr-26 16:00 ALTALINK TE 37s Protection & Control (37s North Calder) trip testing 37s726E 3.33 Days
Continuous		  
31-Mar-26 09:00 31-Mar-26 11:00 ATCO TE ATCO Telecom Equipment Heart Lake_S-telecom - upgrading Heart lake net 1 and net 11 SARs to v21, then v22.2 separate outage 2 Hours
Continuous		  
31-Mar-26 09:00 31-Mar-26 16:00 ATCO TE 823s RTU/SCADA (823s Wapiti) RTU updates 7 Hours
Continuous		  
31-Mar-26 09:00 31-Mar-26 16:00 ALTALINK Outage 428s 733N (428s Namaka), 733L (151s Strathmore - 428S Namaka), 151s 733E (151s Strathmore) 428s733N 138kV CB maintenance 7 Hours
Continuous		  
31-Mar-26 09:00 05-Apr-26 17:00 SUNCOR TE 29EDD-34 RTU/SCADA (29EDD-34) change few setting / parameter in server RTU (SEL-3350) configuration and download again 5.33 Days
Continuous		  
31-Mar-26 09:00 31-Mar-26 14:00 ATCO, ALTALINK Outage 7L794 (157s Lac La Biche - 819s Whitby Lake), 819s 702 (819s Whitby Lake) 702 low gas 5 Hours
Continuous		  
31-Mar-26 10:00 07-Apr-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) 21B/7L55 for relay testing,
21B/7L172 for relay settings change
, 21B/7L67 for relay settings change
 7.31 Days
Continuous		  
31-Mar-26 10:00 07-Apr-26 17:30 ATCO TE 743s Protection & Control (743s Sarah Lake) 21B/7L67 for relay settings change 7.31 Days
Continuous		  
01-Apr-26 07:00 02-Apr-26 17:00 EPCOR TE 72LS24 (EP 803s Lambton - Strathcona) protection blocking, SOM module replacement 1.42 Days
Continuous		  
01-Apr-26 08:00 01-Apr-26 18:00 Syncrude TE Syncrude ICCP Outage SCADA - server update whole syncrude visibility loss 10 Hours
Daily		  
01-Apr-26 08:00 01-Apr-26 16:00 ENMAX RB 31.84L (SS-31 - SS-32) spring transmission line washing 8 Hours
Continuous		  
01-Apr-26 08:00 01-Apr-26 16:00 ENMAX RB 24.82L (SS-24 - SS-65) spring transmission line washing 8 Hours
Continuous		  
01-Apr-26 08:00 01-Apr-26 16:00 ENMAX RB 24.81L (SS-24 - SS-31) spring transmission line washing 8 Hours
Continuous		  
01-Apr-26 08:00 01-Apr-26 17:00 ALTALINK Outage 708L (233s Beamer - 708AL tap), 233s 708X (233s Beamer) OHSW maintenance 9 Hours
Continuous		  
01-Apr-26 08:00 02-Apr-26 18:00 ALTALINK, NOVACORP, NOVAC Outage 330L1 (535s Joffre - 330s Nova Joffre), 535s 5652 (535s Joffre), 535s 5552 (535s Joffre), 330s BR-52 (330s Nova Joffre), 196s R3-BR-A (196s Nova Chemicals), 535s 96N (535s Joffre) electrical equipment maintenance, corrective work, line OPGW fiber testing and PRC-005 testing 1.42 Days
Continuous		  
01-Apr-26 08:00 01-Apr-26 17:00 ALTALINK TE 43s RTU/SCADA (43s Shell Canada Jumping Pound Jct) firmware upgrade on MPLS node A, firewall upgrade 9 Hours
Continuous		  
01-Apr-26 08:00 01-Apr-26 16:00 ALTALINK TE 43s RTU/SCADA (43s Shell Canada Jumping Pound Jct) split the existing SCADA VLAN from 1 to 1 and 2 8 Hours
Continuous		  
01-Apr-26 08:00 02-Apr-26 16:00 ENMAX Outage 16.2TR (SS-16) tap changer inspection - 16.2-TC, reversing switch check, oil sampling MT, TC 1.33 Days
Continuous		  
01-Apr-26 08:00 01-Apr-26 12:00 ENMAX Outage 15.60L (SS-15 - SS-21), 21B69-15.60 (SS-21), 15B69-15.60 (SS-15), SW65 (SS-21) HV breaker SF6 gas sample - 21B69-15.60 4 Hours
Continuous		  
01-Apr-26 09:00 01-Apr-26 11:00 ATCO TE ATCO Telecom Equipment Newell telecom upgrade Net 11 and Net 2
 2 Hours
Continuous		  
01-Apr-26 09:00 02-Apr-26 17:00 ALTALINK IO 535s 5652 (535s Joffre), 535s 5552 (535s Joffre) repair hot spot on 535s96N 1.33 Days
Continuous		  
01-Apr-26 10:00 01-Apr-26 16:00 ALTALINK Outage 56s 138kV Bus 2 (56s Boyle), 710L (56s Boyle - 159s Colinton), 56s T2 (56s Boyle), 56s C1 (56s Boyle), 56s 710X (56s Boyle), 56s 652 (56s Boyle), 159s 710 (159s Colinton) transformer maintenance 6 Hours
Continuous		  
01-Apr-26 10:00 01-Apr-26 16:00 ALTALINK Outage 507L (83s Taber - 257s Hull), 83s 507 (83s Taber), 257s 507 (257s Hull) 83s507 minor maintenance and first trip 6 Hours
Continuous		  
01-Apr-26 12:00 01-Apr-26 16:00 NOVAC TE 196s RTU/SCADA (196s Nova Chemicals) fiber testing and repair if required 4 Hours
Continuous		  
01-Apr-26 12:01 01-Apr-26 16:00 ENMAX Outage 21.61L (SS-21 - SS-34), 21B69-21.61 (SS-21), 34B69-21.61 (SS-34) HV breaker SF6 gas sample 3.98 Hours
Continuous		  
01-Apr-26 18:00 02-Apr-26 18:30 ATCO, ALTALINK IO 7L199 (347s AML Fox Creek - 741s ATC Fox Creek), 347s 199W (347s AML Fox Creek) operate A741s 702 to facilitate 1st energization of 347s199W 24.5 Hours
Continuous		  
02-Apr-26 08:00 02-Apr-26 16:00 ENMAX RB 11.82L (SS-11 - SS-14) spring transmission line washing 8 Hours
Continuous		  
02-Apr-26 08:00 02-Apr-26 16:00 ENMAX RB 14.83L (SS-14 - SS-36) spring transmission line washing 8 Hours
Continuous		  
02-Apr-26 08:00 13-Apr-26 16:00 ENMAX Outage 33.84L (SS-33 - SS-43), 33B138-33.84 (SS-33), 43B138-33.84 (SS-43) shield wire and O-ring replacement 11.33 Days
Continuous		  
02-Apr-26 08:00 02-Apr-26 17:00 ALTALINK TE AltaLink Telecom Equipment firmware upgrade on MPLS node A, firewall upgrade 9 Hours
Continuous		  
02-Apr-26 08:00 02-Apr-26 16:00 ALTALINK TE 535s Protection & Control (535s Joffre) communication card change/end to end testing 8 Hours
Continuous		  
02-Apr-26 08:00 02-Apr-26 16:00 ENMAX Outage 162.4TR (SS-162) relays, lockout testing 162RLY138-162.4TR, tap changer reversing switch check 8 Hours
Continuous		  
02-Apr-26 08:00 02-Apr-26 16:00 ENMAX Outage 21.1C (SS-21), 21B138-21.CAP (SS-21) HV breaker maintenance 8 Hours
Continuous		  
03-Apr-26 08:00 03-Apr-26 16:00 ENMAX, ALTALINK Outage 36.81L (44s Bearspaw Plant - SS-36), 44s 36.81E (44s Bearspaw Plant), 36B138-36.81 (SS-36) shield wire replacement 8 Hours
Continuous		  
03-Apr-26 08:00 03-Apr-26 12:00 ENMAX Outage 15.62L (SS-15 - SS-16) spring transmission line washing 4 Hours
Continuous		  
03-Apr-26 08:00 03-Apr-26 12:00 ENMAX Outage 16.60L (SS-16 - SS-34) spring transmission line washing 4 Hours
Continuous		  
03-Apr-26 08:00 03-Apr-26 16:00 ENMAX RB 3.84L (SS-3 - SS-13) pole hold on a new development outside 3 sub 8 Hours
Continuous		  
03-Apr-26 08:00 03-Apr-26 16:00 ALTALINK TE 28s RTU/SCADA (28s West Brooks) split the existing SCADA VLAN from 1 to 1 and 2 8 Hours
Continuous		  
03-Apr-26 09:00 03-Apr-26 16:00 ALTALINK, ENMAX IO 44s 36.81E (44s Bearspaw Plant), 36.81L (44s Bearspaw Plant - SS-36) shield wire replacement 7 Hours
Continuous		  
03-Apr-26 12:00 03-Apr-26 16:00 ENMAX Outage 15.60L (SS-15 - SS-21) spring transmission line washing 4 Hours
Continuous		  
03-Apr-26 12:00 03-Apr-26 16:00 ENMAX Outage 21.61L (SS-21 - SS-34) spring transmission line washing 4 Hours
Continuous		  

Prepared On:   2026-03-30   16:34:09

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