Alberta Electric System Operator
System Co-ordination Plan
2025-11-20 to 2025-11-28
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		  
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-Feb-26 16:00 ENMAX Outage 38.1C (SS-38) capacitor bank switcher replacement 179.38 Days
Continuous		  
05-Sep-25 08:00 28-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. 84.38 Days
Continuous		  
05-Sep-25 08:00 28-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. 84.38 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		  
15-Oct-25 12:00 01-Dec-25 17:00 EPCOR Outage 330P 12TC1 (330p Genesee), 330p 805 (330p Genesee) Genesee: 12TC1 emergency bushing investigation 47.25 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		  
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		  
01-Nov-25 12:00 01-Feb-26 18:00 ALTALINK Outage AML 511s ACF12 (AML 511s Crossings) forced outage 92.29 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		  
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 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 10-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 36.19 Days
Continuous		  
12-Nov-25 07:30 21-Nov-25 17:30 ATCO, ALTALINK RB 1036L (356s Milo - 554s Travers) crews will be within close proximity on 1005L (STR 3-75) 9.42 Days
Daily		  
12-Nov-25 08:00 21-Nov-25 16:00 ENMAX Outage 20.1TR (SS-20) maintenance 9.33 Days
Continuous		  
13-Nov-25 18:00 24-Nov-25 12:00 ALTALINK Outage 1005L (356s Milo - 1005AL tap) repairing the inner between STR 3-75 on 1005L 10.75 Days
Continuous		  
14-Nov-25 07:00 03-Dec-25 18:00 ALTALINK RB 931L (28s West Brooks - 132s Ware Junction) required for 1053L GOI due to proximity 19.46 Days
Daily		  
14-Nov-25 07:00 24-Nov-25 17:30 ALTALINK RB 759L (87s Gaetz - 276s Prentiss) prep structure 27-30 for the upcoming GOI and setting structures on 986L/962L near 10-21 10.44 Days
Daily		  
14-Nov-25 09:30 03-Dec-25 18:00 ALTALINK Outage 1053L (132s Ware Junction - 324s Cassils) install ~6.8 km of new conductor for new 1075L on open side of tower opposite to 1053L on structures 19.35 Days
Continuous		  
14-Nov-25 16:00 23-Nov-25 11:00 ALTALINK IO 714L (397s Benbow – 1117s South Kaybob) complete work inside of 714L breaker bay 8.79 Days
Continuous		  
17-Nov-25 07:00 25-Nov-25 17:00 EPCOR TE Protection & Control (Namao) protection blocking for NW15 line protection upgrade 8.42 Days
Continuous		  
17-Nov-25 07:00 23-Nov-25 17:00 EPCOR Outage 814s T2 (814s Bellamy), 814s B2402 (814s Bellamy), 814s B2406 (814s Bellamy), BR722 (Rossdale) TX2 bushing replacement and 240kv SF6 gas tests and leak checks 6.42 Days
Continuous		  
17-Nov-25 07:00 21-Nov-25 08:00 ALTALINK Outage 409s T2 (409s Shell Scotford) replace T2 NGR 4.04 Days
Continuous		  
17-Nov-25 07:00 11-Dec-25 17:00 EPCOR TE 814s Protection & Control (814s Bellamy) protection blocking, DFR commissioning 24.42 Days
Continuous		  
17-Nov-25 07:00 21-Nov-25 17:00 EPCOR TE 72DS26 (665s Dome - Strathcona) protection blocking for 72DS26 line protection A upgrade 4.42 Days
Continuous		  
17-Nov-25 07:30 24-Nov-25 16:30 ALTALINK RB 913L (69s North Barrhead - 732s Mitsue) walk up and climbing inspection 7.38 Days
Continuous		  
17-Nov-25 08:00 20-Nov-25 17:00 ATCO IO ATCO Telecom Equipment Lanfine_S-Telecom upgrade 3.38 Days
Continuous		  
17-Nov-25 08:00 24-Nov-25 16:00 ATCO RB 7L61 (780s Lubicon - 796s Nipisi) walk up and climbing inspection 7.33 Days
Continuous		  
17-Nov-25 08:00 24-Nov-25 16:00 ATCO RB 9L913 (69s North Barrhead - 732s Mitsue) walk up and climbing inspection 7.33 Days
Continuous		  
17-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE 397s RTU/SCADA (397s Benbow) update configuration for L2 protection upgrade, AIS 1159 additions, and 43M addition 10.38 Days
Daily		  
17-Nov-25 08:00 21-Nov-25 17:00 ALTALINK TE 312s RTU/SCADA (312s Fidler) split breaker alarms 4.38 Days
Daily		  
17-Nov-25 08:00 20-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 262s RTU/SCADA (262s Rocky Mountain House) MPLS firmware upgrade 3.38 Days
Daily		  
17-Nov-25 08:00 20-Nov-25 17:00 ALTALINK TE 250p RTU/SCADA (250P Bighorn Plant), AltaLink Telecom Equipment MPLS firmware upgrade 3.38 Days
Daily		  
17-Nov-25 08:00 20-Nov-25 17:00 ALTALINK TE 482s RTU/SCADA (482s Haynes), AltaLink Telecom Equipment MPLS firmware upgrade 3.38 Days
Daily		  
17-Nov-25 08:00 20-Nov-25 17:00 ALTALINK TE 297s RTU/SCADA (297s Rimbey), AltaLink Telecom Equipment MPLS firmware upgrade 3.38 Days
Daily		  
17-Nov-25 08:00 20-Nov-25 17:00 ALTALINK TE 581s RTU/SCADA (581s Amoco Ricinus), AltaLink Telecom Equipment MPLS firmware upgrade 3.38 Days
Daily		  
17-Nov-25 08:00 20-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 142s RTU/SCADA (142s Magcan) MPLS firmware upgrade 3.38 Days
Daily		  
17-Nov-25 08:30 20-Nov-25 16:30 ALTALINK IO 913L (69s North Barrhead - 732s Mitsue) protection upgrade 3.33 Days
Continuous		  
17-Nov-25 08:30 20-Nov-25 17:00 ALTALINK TE 409s Protection & Control (409s Shell Scotford) protection outages for SCADA upgrades 3.35 Days
Daily		  
17-Nov-25 08:30 20-Nov-25 17:00 ALTALINK TE 409s RTU/SCADA (409s Shell Scotford) update config for new functionality on existing RTU 3.35 Days
Daily		  
17-Nov-25 09:00 27-Nov-25 18:00 ALTALINK Outage 799L (235s Entwistle - 443s South Mayerthorpe), 235s 799N (235s Entwistle) 799L rebuild (Str 830-858) 10.38 Days
Continuous		  
17-Nov-25 09:00 20-Nov-25 16:00 ATCO, ALTALINK Outage 9L913 (69s North Barrhead - 732s Mitsue), 732s 903 (732s Mitsue), 732s 904 (732s Mitsue), 69s 913N (69s North Barrhead) protection upgrade 3.29 Days
Continuous		  
17-Nov-25 09:00 28-Nov-25 17:30 ALTALINK TE 177s RTU/SCADA (177s West Cascade) SCADA cutover 11.35 Days
Daily		  
17-Nov-25 10:00 26-Nov-25 16:00 ATCO Outage 7L106 (834s Wesley Creek - 905s Meikle) soil around the tower footings has eroded ( tower replacement ) 9.25 Days
Continuous		  
17-Nov-25 10:00 26-Nov-25 16:00 ATCO Outage 7L131 (834s Wesley Creek - 905s Meikle), 834s 708 (834s Wesley Creek), 834s 710 (834s Wesley Creek), 834s 7L131D2 (834s Wesley Creek) soil around the tower footings has eroded ( Tower Replacement ) 9.25 Days
Continuous		  
17-Nov-25 10:00 24-Nov-25 16:00 ATCO Outage 7L90 (741s ATC Fox Creek - 7LA90 tap), 741s 701 (741s ATC Fox Creek) RAS installation and commissioning 7.25 Days
Continuous		  
17-Nov-25 10:00 25-Nov-25 17:00 ALTALINK TE 397s Protection & Control (397s Benbow) settings changes & testing 8.29 Days
Daily		  
17-Nov-25 10:00 20-Nov-25 17:00 ATCO RB 7L86 (822s Wolf Lake - 1200s Foster Creek) L-G clearance mitigation pole changes 3.29 Days
Continuous		  
17-Nov-25 11:30 21-Nov-25 10:30 ALTALINK Outage 184s 34 (184s Petro-Canada Edmonton) replace koncar CTs associated with 184s34 3.96 Days
Continuous		  
17-Nov-25 11:30 20-Nov-25 17:00 ALTALINK TE 42s Protection & Control (42s Sarcee) protections required to isolate CTs associated with 42s7 3.23 Days
Daily		  
17-Nov-25 12:00 28-Nov-25 18:30 ALTALINK Outage 29s T2 (29s Cascade) SCADA cutovers from T29s RTU to 177s RTU 11.27 Days
Continuous		  
17-Nov-25 12:00 24-Nov-25 17:00 ATCO TE 951s RTU/SCADA (951s Thickwood Hills) firmware upgrades of line protection relays and breaker fail relays for that week
RTU Config changes may be required		 7.21 Days
Continuous		  
17-Nov-25 12:30 27-Nov-25 17:30 ALTALINK TE 62s RTU/SCADA (62s Brazeau Plant) RTU database updates 10.21 Days
Daily		  
17-Nov-25 13:00 28-Nov-25 17:30 ALTALINK TE 562s RTU/SCADA (562s Cypress) ACC Visbility project 11.19 Days
Daily		  
17-Nov-25 14:00 20-Nov-25 17:00 ENMAX, ALTALINK Outage 7.82L (42s Sarcee - SS-7), 42s 7 (42s Sarcee) 42s7 CT replacement 3.13 Days
Continuous		  
17-Nov-25 14:00 20-Nov-25 17:00 ENMAX, ALTALINK RB 7.82L (42s Sarcee - SS-7) 42s7 CT replacement 3.13 Days
Continuous		  
18-Nov-25 07:00 24-Nov-25 17:00 ATCO TE 951s Protection & Control (951s Thickwood Hills) breaker fail relays for firmware upgrade and local testing, 50bf/911
2. 50bf/910
3. 9L07-906		 6.42 Days
Continuous		  
18-Nov-25 08:00 20-Nov-25 16:00 ENMAX Outage 16.61L (SS-16 - SS-27), 27B69-16.61 (SS-27), 16B69-16.61 (SS-16) 27 sub security upgrade - security post proximity to line 2.33 Days
Continuous		  
18-Nov-25 09:00 20-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 2075s RTU/SCADA (2075s Newell) med bes firewall install - outage to local network & scada communications 2.33 Days
Continuous		  
18-Nov-25 13:00 28-Nov-25 17:00 BCH Outage T4 (BCH Natal) natal substation replacement and etm install 10.17 Days
Continuous		 AB-BC
19-Nov-25 07:00 20-Nov-25 17:00 ATCO TE 951s Protection & Control (951s Thickwood Hills) firmware upgrades on 94BA/900-1200BS1 (SEL-2440) and 94BA/900-1200BS1 (SEL-2440), including post upgrade commissioning 1.42 Days
Continuous		  
19-Nov-25 07:00 20-Nov-25 18:00 ALTALINK TE AltaLink Telecom Equipment addition of secondary MPLS node - MPLS 7705B, to provide diversity to the existing circuits 1.46 Days
Continuous		  
19-Nov-25 07:00 23-Nov-25 10:49 ATCO RB 7L16 (766s Nevis - 948s Heatburg) facilitate work adjacent to line for CETO project 4.16 Days
Continuous		  
19-Nov-25 08:00 21-Nov-25 20:00 SUNCOR TE 29PL6-3 (29EDD-1 Millennium - 30EDD-1), 30EDD-1 627 (30EDD-1) 29PL6-3 A87L GE L90 firmware 8.6 - 300477554 2.5 Days
Continuous		  
19-Nov-25 09:00 20-Nov-25 16:00 ATCO TE 939s Protection & Control (939s Livock) relay work
 31 Hours
Continuous		  
19-Nov-25 09:00 20-Nov-25 20:00 SUNCOR TE 29EDD-2 29PT-3 (29EDD-2 Tar Island), 29EDD-2 Protection & Control (29EDD-2 Tar Island) 29EDD-2, 29PT-3 94T-A - replacement 1.46 Days
Continuous		  
19-Nov-25 10:00 20-Nov-25 17:00 ALTALINK TE 353s Protection & Control (353s Plamondon) standard relay maintenance 31 Hours
Daily		  
19-Nov-25 10:00 21-Nov-25 17:30 ATCO TE 834s Protection & Control (834s Wesley Creek), 834s RTU/SCADA (834s Wesley Creek) 834S 7L131 21A protection communication card replacement
 2.31 Days
Continuous		  
20-Nov-25 07:00 20-Nov-25 17:00 ATCO Outage 7L42 (716s Lloydminster - 751s Hill), 751s 702 (751s Hill) structure alterations to accommodate new development 75th Ave and 19th Street in the City of Lloydminster 10 Hours
Continuous		  
20-Nov-25 07:00 20-Nov-25 16:30 ALTALINK Outage AML 511s T30 (AML 511s Crossings), AML 511s SVC Plus (AML 511s Crossings), AML 511s 1152 (AML 511s Crossings) annual fire system maintenance on the SVC+ 9.5 Hours
Daily		  
20-Nov-25 07:00 21-Nov-25 17:00 ATCO TE 951s Protection & Control (951s Thickwood Hills) firmware upgrades on 94BA/SVS (SEL-2440) and 94BA/SVS (SEL-2440), including post upgrade commissioning 1.42 Days
Continuous		  
20-Nov-25 08:00 20-Nov-25 17:00 ALTALINK TE APS# 112 Cypress 562s - Power/Under & Over Frequency Scheme, 562s Protection & Control (562s Cypress) adding supervisory controls to RAS112 scheme 9 Hours
Daily		  
20-Nov-25 08:00 20-Nov-25 15:00 ALTALINK Outage 312s 552 (312s Fidler) splitting alarm contact and wiring each alarm point from breaker control cabinet to D25 in control building 7 Hours
Daily		  
20-Nov-25 08:00 20-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 242s RTU/SCADA (242s Flat Lake) upgrade MPLS node 9 Hours
Daily		  
20-Nov-25 08:00 20-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 28s RTU/SCADA (28s West Brooks) 2025 MPLS firmware upgrade 9 Hours
Daily		  
20-Nov-25 09:00 21-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 767s RTU/SCADA (767s Oyen) low BES firewall install - outage to local network & SCADA communications 1.33 Days
Continuous		  
20-Nov-25 09:00 20-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 825s Whitefish Lake RTU/SCADA Whitefish Lake_S_Telecom - firewall install - outage to local network & SCADA communications 8 Hours
Continuous		  
20-Nov-25 09:00 21-Nov-25 17:00 BCH IO T4 (BCH Natal) NTL 2CB2 BFPN, 2CT2 inspection 1.33 Days
Continuous		 AB-BC
21-Nov-25 07:00 22-Nov-25 17:00 ATCO TE 951s Protection & Control (951s Thickwood Hills) firmware upgrades on 87VB-51B-27B-59B/920C (SEL-487V) and 51-27-59/920C (SEL-351S) including post upgrade commissioning 1.42 Days
Continuous		  
21-Nov-25 07:00 25-Nov-25 18:00 NWE, BHE Canada, BHE Outage Hay Lake (NorthWestern Energy) - Marias (MATL), North Series Capacitor (BHE Hay Lake), Marias Shunt Capacitor, 2302 (NWE Marias), 2305 (NWE Marias) string wire into Marias from new Glacier sub and install new airbreaks 4.46 Days
Continuous		 AB-MATL
21-Nov-25 08:00 02-Dec-25 21:00 SUNCOR TE 29EDD-94 29-952-9707 (29EDD-94 Voyageur), 29EDD-94 29-952-9708 (29EDD-94 Voyageur), 29EDD-94 29-952-9709 (29EDD-94 Voyageur), 29EDD-94 29-952-9710 (29EDD-94 Voyageur), 29EDD-94 29-952-9711 (29EDD-94 Voyageur), 29EDD-94 29-952-9712 (29EDD-94 Voyageur) perform rolling regulatory GE C60 firmware 8.6 updates on the following breakers at 29EDD-94 - 952-9707/9708/9709/9712/9711/9710 11.54 Days
Continuous		  
21-Nov-25 08:00 21-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 9.5 Hours
Daily		  
21-Nov-25 08:00 21-Nov-25 17:30 ALTALINK TE 678s Protection & Control (678s Okotoks) major SCADA upgrade project-replacement of D20 RTU with new SG-4260 data concentrator and deficiency cleanup 9.5 Hours
Daily		  
21-Nov-25 08:00 21-Nov-25 12:00 ENMAX Outage 3.3TR (SS-3) oil sampling - 3.3-TC, MT snd Silica Gel Canister upgrade - 3.3 TR - MT 4 Hours
Continuous		  
21-Nov-25 08:00 20-Dec-25 16:00 ENMAX Outage 38.3TR (SS-38) 38.3TR secondary cable replacement 29.33 Days
Continuous		  
21-Nov-25 08:30 21-Nov-25 17:30 ALTALINK Outage 678s T2 (678s Okotoks), 678s 452 (678s Okotoks) completing deficiencies on T2 OLTC SCADA controls 9 Hours
Daily		  
21-Nov-25 09:00 24-Nov-25 16:00 ATCO Outage 9L56 (720s Wabasca - 732s Mitsue), 732s 904 (732s Mitsue), 732s 906 (732s Mitsue) protection upgrade 3.29 Days
Continuous		  
21-Nov-25 09:00 21-Nov-25 13:00 ATCO RB 7L63 (780s Lubicon - 812s Norcen), 7L63 (788s Hotchkiss - 7LA63 tap) high load move lift bottom phase 4 Hours
Continuous		  
21-Nov-25 09:00 21-Nov-25 15:06 BCH Outage 2CB2 (BCH Nelway) 5CB13 CN PM BC maintenance does not affect the Alberta ATC 6.1 Hours
Continuous		 AB-BC
21-Nov-25 09:30 21-Nov-25 18:00 ATCO Outage 7L65 (710s Vermilion - 7LA65 tap), 710s 703 (710s Vermilion) relocate breaker 703 controls to a new smaller mounting plate 8.5 Hours
Continuous		  
21-Nov-25 11:00 21-Nov-25 15:00 ATCO RB 7L23 (732s Mitsue - 7L23 tap), 7L23 (796s Nipisi - 7L23 tap) high load move lift bottom phase 2 locations - 7L23-212 & 7L23-440 4 Hours
Continuous		  
21-Nov-25 18:00 23-Nov-25 08:00 ENMAX, ALTALINK IO 936L (5s East Calgary - 102s Langdon) crew working in vicinity of 937L 1.58 Days
Continuous		  
21-Nov-25 18:00 23-Nov-25 08:00 ENMAX, ALTALINK Outage 937L (5s East Calgary - 102s Langdon), 5s 1552 (5s East Calgary), 5s 1652 (5s East Calgary) re-conductor between str 15 to 18 on both circuits for line clearance mitigation 1.58 Days
Continuous		  
21-Nov-25 18:00 23-Nov-25 08:00 ENMAX, ALTALINK Outage 936L (5s East Calgary - 102s Langdon) crew working in vicinity of 937L 1.58 Days
Continuous		  
21-Nov-25 18:00 23-Nov-25 08:00 ENMAX, ALTALINK IO 937L (5s East Calgary - 102s Langdon) re-conductor between str 15 to 18 on both circuits for line clearance mitigation 1.58 Days
Continuous		  
22-Nov-25 08:00 03-Dec-25 16:00 ATCO Outage 7L129 (710s Vermilion - 7LA129 tap), 710s 704 (710s Vermilion) 7L129 A and B line protection upgrade 11.33 Days
Continuous		  
22-Nov-25 08:00 03-Dec-25 16:00 ATCO TE 710s Protection & Control (710s Vermilion) 7L129 relays being replaced 11.33 Days
Continuous		  
22-Nov-25 08:30 22-Nov-25 13:00 ALTALINK Outage 562s 1352 (562s Cypress) ACC visibility project work 4.5 Hours
Daily		  
22-Nov-25 09:00 03-Dec-25 17:00 ATCO TE 710s Protection & Control (710s Vermilion) protection work 11.33 Days
Continuous		  
22-Nov-25 13:01 22-Nov-25 17:00 ALTALINK Outage 562s 1452 (562s Cypress) ACC visibility project work 3.98 Hours
Continuous		  
23-Nov-25 08:00 26-Nov-25 16:00 ENMAX, ALTALINK RB 936L (5s East Calgary - 102s Langdon) working in the vicinity of the line, 937L Tower climbing inspections, install dampers 3.33 Days
Continuous		  
23-Nov-25 08:00 28-Nov-25 16:00 Syncrude Outage AL-2 (Aurora - D05 Syncrude), 222 (Aurora), 223 (Aurora), D05 514 (D05), D05 511 (D05), D05 512 (D05), 222A (Aurora), 222B (Aurora), 223A (Aurora), 223B (Aurora), 89-225 (Aurora), D05 511A (D05), D05 511B (D05), D05 512A (D05), D05 512B (D05) complete D05 substation zone 4 260kV PM 5.33 Days
Continuous		  
23-Nov-25 08:00 23-Nov-25 16:00 ENMAX Outage 24.2TR (SS-24) breaker stuck in cell - need bus outage 8 Hours
Continuous		  
23-Nov-25 08:30 23-Nov-25 13:00 ALTALINK Outage 562s 1652 (562s Cypress) visibility project work, breaker alarms splitting 4.5 Hours
Daily		  
23-Nov-25 09:00 26-Nov-25 14:00 ENMAX Outage 40.81L (SS-40 - SS-41), 41B138-40.81 (SS-41), 40B138-40.81 (SS-40) install three new line surge arrestors 3.21 Days
Continuous		  
23-Nov-25 10:00 09-Dec-25 09:00 ALTALINK Outage 864L (397s Benbow - 864AL tap), 397s 864W (397s Benbow), 864CL (397s Benbow – 1117s South Kaybob) close 864CL open point 'AA', open Point 'BB', open point 'CC' 15.96 Days
Continuous		  
23-Nov-25 13:00 23-Nov-25 17:00 ALTALINK Outage 562s 1752 (562s Cypress) visibility project work, breaker alarms splitting 4 Hours
Daily		  
24-Nov-25 07:00 30-Nov-25 17:00 EPCOR Outage EP 803s T3 (EP 803s Lambton), EP 803s L721 (EP 803s Lambton), 72LH8 (EP 803s Lambton - EP Hardisty), 72LS24 (EP 803s Lambton - Strathcona) LDS11 and LDS12 LCR 6.42 Days
Continuous		  
24-Nov-25 07:00 05-Dec-25 17:00 EPCOR Outage 72NW15 (Namao - Woodcroft), W723 (Woodcroft), N726 (Namao) NW15: line protection upgrade cutovers 11.42 Days
Continuous		  
24-Nov-25 07:00 28-Nov-25 17:00 ALTALINK, EPCOR Outage 1044L (EP 805s Jasper - 816s Petrolia), 816s P2405 (816s Petrolia), 816s P2406 (816s Petrolia), 816s PDS14 (816s Petrolia) Petrolia 1044L CT LCR 4.42 Days
Continuous		  
24-Nov-25 07:00 02-Dec-25 12:00 ENMAX, ALTALINK Outage 832L (SS-10 - SS-12), 10.1TR (SS-10), 10B138-832 (SS-10), 10MD138-10.1TR (SS-10) 10.1TR 'S' protection replacement, trip test 10B138-832L, and protection operation 10MD138-10.1TR 8.21 Days
Continuous		  
24-Nov-25 07:00 11-Dec-25 17:00 ENMAX TE Protection & Control (SS-10) 10 sub 138KV bus diff protection outage, 10.1TR and 10.2TR 'S' protection replacement 17.42 Days
Daily		  
24-Nov-25 07:00 11-Dec-25 17:00 ENMAX TE Protection & Control (SS-10) 10PT138-Z31 secondary outage, 10.1TR and 10.2TR 'S' protection replacement 17.42 Days
Daily		  
24-Nov-25 07:00 11-Dec-25 17:00 ENMAX TE Protection & Control (SS-10) 10sub auto switching scheme outage, 10.1TR and 10.2TR 'S' protection replacement 17.42 Days
Daily		  
24-Nov-25 07:00 02-Dec-25 12:00 ENMAX, ALTALINK IO 832L (SS-10 - SS-12) 10.1TR 'S' protection replacement, trip test 10B138-832L, protection operation 10MD138-10.1TR 8.21 Days
Daily		  
24-Nov-25 07:00 24-Nov-25 16:00 ENMAX TE Protection & Control (SS-14) 14.1TR A and B transformer protection outage 9 Hours
Continuous		  
24-Nov-25 07:00 30-Nov-25 18:00 ATCO RB 7L16 (766s Nevis - 948s Heatburg) HOP on 7L16 to facilitate work adjacent to line for CETO project 6.46 Days
Continuous		  
24-Nov-25 07:00 28-Nov-25 17:00 EPCOR TE Protection & Control (Strathcona) Strathcona: Protection Blocking, TX1 and S721. DS26 Line Protection "A" Upgrade. Cutover protection on to the MPLS. Redundant protection to remain in service at all times. 4.42 Days
Continuous		  
24-Nov-25 07:30 04-Dec-25 17:30 ATCO, ALTALINK RB 1036L (356s Milo - 554s Travers) crews will be within close proximity on 1005L (STR 88-228) 10.42 Days
Daily		  
24-Nov-25 07:30 04-Dec-25 17:30 ALTALINK RB 1041L (370s North Lethbridge - 554s Travers) crews will be within close proximity on 1005L (STR 88-228) 10.42 Days
Daily		  
24-Nov-25 08:00 24-Nov-25 16:00 ENMAX Outage 14.83L (SS-14 - SS-36), 14B138-14.83 (SS-14) transformer protection replacement, trip test/BF init 8 Hours
Continuous		  
24-Nov-25 08:00 25-Nov-25 17:00 ALTALINK TE 39s RTU/SCADA (39s Bickerdike) update config to add 1159AIS alarms 1.38 Days
Daily		  
24-Nov-25 08:00 25-Nov-25 17:00 ALTALINK TE 1012s RTU/SCADA (1012s Deer Hill) update config to add 43m/252 (1012s854) & 1159AIS alarms 1.38 Days
Daily		  
24-Nov-25 08:00 25-Nov-25 17:00 ALTALINK TE 1012s Protection & Control (1012s Deer Hill) settings changes and testing associated with the addition of 1159AIS scheme on 854L A21/L2 & B21/L2 protections 1.38 Days
Daily		  
24-Nov-25 08:00 25-Nov-25 17:00 ALTALINK TE 1012s Protection & Control (1012s Deer Hill) settings changes and testing associated with the addition of 1159AIS scheme on 685L A21/L1 & B21/L1 protections 1.38 Days
Daily		  
24-Nov-25 08:00 24-Nov-25 16:00 ENMAX TE 2.80L (SS-2 - SS-23) 2.80L A protection outage 8 Hours
Continuous		  
24-Nov-25 08:00 24-Nov-25 18:00 ALTALINK TE AltaLink Telecom Equipment, AltaLink RTU/SCADA (AltaLink) support BC Hydro to complete RTU upgrade at Cranbrook 2002s 10 Hours
Daily		  
24-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 142s RTU/SCADA (142s Magcan) MPLS firmware upgrade to be completed remotely and MPLS router 7705hm to be rebooted during the upgrade 3.38 Days
Daily		  
24-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 392s RTU/SCADA (392s Black Diamond) MPLS firmware upgrade to be completed remotely and MPLS router 7705hm to be rebooted during the upgrade 3.38 Days
Daily		  
24-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment MPLS firmware upgrade 3.38 Days
Daily		  
24-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 284s RTU/SCADA (284s Nose Creek) MPLS firmware upgrade to be completed remotely and MPLS router 7705hm to be rebooted during the upgrade, PSLAN and Firewall will be done during the outage 3.38 Days
Daily		  
24-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 428s RTU/SCADA (428s Namaka) MPLS firmware upgrade, PSLAN and Firewall will be done during the outage 3.38 Days
Daily		  
24-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment MPLS firmware upgrade to be completed remotely and MPLS router 7705hm to be rebooted during the upgrade, PSLAN and Firewall will be down during the outage 3.38 Days
Daily		  
24-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment MPLS firmware upgrade 3.38 Days
Daily		  
24-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE 337s RTU/SCADA (337s Canada Liquidair), AltaLink Telecom Equipment update MPLS firmware 3.38 Days
Daily		  
24-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 522s RTU/SCADA (522s Cooking Lake) update MPLS firmware 3.38 Days
Daily		  
24-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 191s RTU/SCADA (191s N.W. Cardiff) update MPLS firmware 3.38 Days
Daily		  
24-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 99s RTU/SCADA (99s North St. Albert) update MPLS firmware 3.38 Days
Daily		  
24-Nov-25 08:00 24-Nov-25 16:00 ENMAX TE RTU/SCADA (SS-38) SDN upgrade 8 Hours
Continuous		  
24-Nov-25 08:30 24-Nov-25 13:00 ALTALINK Outage 562s 1852 (562s Cypress) ACC visibility project work - breaker alarms splitting 4.5 Hours
Daily		  
24-Nov-25 09:00 08-Dec-25 17:30 ATCO Outage 2075s ACF21 (2075s Newell), 2075s 902T (2075s Newell), 2075S 930 (2075s Newell) valve cooling skid modifications 14.35 Days
Continuous		  
24-Nov-25 10:00 25-Nov-25 17:00 ALTALINK TE 39s Protection & Control (39s Bickerdike) settings changes and testing associated with the addition of 1159AIS scheme on 854L A21/L1 & B21/L1 protections 31 Hours
Daily		  
24-Nov-25 11:00 28-Nov-25 11:00 ALTALINK Outage 606L (184s Petro-Canada Edmonton - 185s Bretville), 184s 606 (184s Petro-Canada Edmonton) replace koncar CTs associated with 184s606 4 Days
Continuous		  
24-Nov-25 11:00 24-Nov-25 17:00 ALTALINK TE 38s Protection & Control (38s East Edmonton) DSP card replacements on the following: T3 B87/50/51/51NN/T3 and T2 B87/50/51/51NN/T2 6 Hours
Daily		  
24-Nov-25 11:00 28-Nov-25 17:00 ALTALINK TE 58s RTU/SCADA (58s Edson) RTU database updates 4.25 Days
Daily		  
24-Nov-25 11:00 28-Nov-25 17:00 ALTALINK TE 207s RTU/SCADA (207s Pinedale) RTU database updates 4.25 Days
Daily		  
24-Nov-25 11:00 28-Nov-25 17:00 ALTALINK, CascadeP TE 1047s RTU/SCADA (1047s Whisky Jack) RTU database updates 4.25 Days
Daily		  
24-Nov-25 11:30 27-Nov-25 17:00 ALTALINK TE 42s Protection & Control (42s Sarcee) protections required to isolate CTs associated with 42s50 3.23 Days
Daily		  
24-Nov-25 11:30 24-Nov-25 16:00 ALTALINK TE 338s Protection & Control (338s Cherhill) DSP card replacements on the following: 240B2 A87/240B2 URB30 4.5 Hours
Daily		  
24-Nov-25 12:00 24-Nov-25 18:00 ALTALINK, Travers2SolarLP Outage 1005AL (991s Little Bow - 1005L tap), 1005L (120s Picture Butte - 1005AL tap), 1005L (356s Milo - 1005AL tap), 991s Little Bow, 991s 240-1 (991s Little Bow), 991s 34-1 (991s Little Bow), 991s 34-11 (991s Little Bow), 991s 34-13 (991s Little Bow), 991s 34-15 (991s Little Bow), 991s 34-17 (991s Little Bow), 991s 34-3 (991s Little Bow), 991s 34-5 (991s Little Bow), 991s 34-7 (991s Little Bow), 991s 34-9 (991s Little Bow) modifying 1005L85A and closing open point 'A' and creating open point 'B' on the 120s Picture Butte side of 1005L85A 6 Hours
Daily		  
24-Nov-25 12:00 05-Dec-25 08:00 ALTALINK, SHELL Outage 409s T3 (409s Shell Scotford), 409s 1252 (409s Shell Scotford) remove trips from 409s1252. Polaris new breaker 52-84D2 install 10.83 Days
Daily		  
24-Nov-25 12:00 25-Nov-25 17:00 ALTALINK TE 397s Protection & Control (397s Benbow) settings changes and testing associated with the addition of 1159AIS scheme on 685L A21/79/L3 & B21/L3 protections 29 Hours
Daily		  
24-Nov-25 13:00 24-Nov-25 17:00 ALTALINK Outage 562s 2052 (562s Cypress) ACC Visibility project work - Breaker alarms splitting. 4 Hours
Daily		  
24-Nov-25 13:00 27-Nov-25 15:00 ALTALINK TE 102s Protection & Control (102s Langdon) removing relays one at a time to replace failing DSP cards 3.08 Days
Daily		  
24-Nov-25 13:00 27-Nov-25 15:00 ALTALINK TE 520s Protection & Control (520s Bennett) techs to replace failing DSP cards on B500T1B, B87B/500T1B, URB30 3.08 Days
Daily		  
24-Nov-25 13:30 27-Nov-25 16:30 ALTALINK Outage 42s 80 (42s Sarcee) CT replacement 3.13 Days
Continuous		  
24-Nov-25 14:00 27-Nov-25 13:00 ATCO Outage 7L129 (710s Vermilion - 7LA129 tap), 710s 704 (710s Vermilion) replace 7L129 structure's 557 and 558 2.96 Days
Continuous		  
24-Nov-25 18:01 04-Dec-25 08:30 ALTALINK Outage 1005L (120s Picture Butte - 1005AL tap) completing maintenance on 1005L (STR 88-228) 9.6 Days
Continuous		  
25-Nov-25 07:00 29-Nov-25 17:00 EPCOR Outage 814s T1 (814s Bellamy), BR721 (Rossdale), 814s B2401 (814s Bellamy), 814s B2407 (814s Bellamy), 814s BAB1 (814s Bellamy) metering upgrade cutovers 4.42 Days
Continuous		  
25-Nov-25 07:00 07-Dec-25 18:00 ALTALINK Outage 759L (87s Gaetz - 276s Prentiss), 87s 759E (87s Gaetz), 276s 759W (276s Prentiss), 87s 552 (87s Gaetz), 87s 652 (87s Gaetz) salvage the old structure 28-30, set new structure and re-string 12.46 Days
Continuous		  
25-Nov-25 07:00 07-Dec-25 17:30 ALTALINK RB 793L (87s Gaetz - 535s Joffre) south crew working within close proximity on 759L 12.44 Days
Daily		  
25-Nov-25 07:30 26-Nov-25 12:00 ALTALINK Outage 391s 25 (391s Balzac) customer repair damaged structure 28.5 Hours
Continuous		  
25-Nov-25 08:00 27-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 951s RTU/SCADA (951s Thickwood Hills) card maintenance 2.38 Days
Continuous		  
25-Nov-25 08:00 25-Nov-25 14:00 ENMAX Outage 1.80L (SS-1 - SS-28), 28.1TR (SS-28), 28B138-1.80 (SS-28) 28.2TR protection upgrade and test trip 52-80, 52-T1A and 52-T1B 6 Hours
Continuous		  
25-Nov-25 08:00 25-Nov-25 14:00 ENMAX TE Protection & Control (SS-28) 28.2TR protection upgrade and test trip 52-80, 52-T1A and 52-T1B 6 Hours
Continuous		  
25-Nov-25 08:00 25-Nov-25 13:00 ALTALINK Outage 62s 31 (62s Brazeau Plant), 62s T3 (62s Brazeau Plant) ACC visibility upgrades 5 Hours
Daily		  
25-Nov-25 08:00 27-Nov-25 17:00 ATCO RB 7L86 (822s Wolf Lake - 1200s Foster Creek) L-G clearance mitigation pole changes 2.38 Days
Continuous		  
25-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE 405s Protection & Control (405s Waupisoo) standard relay maintenance 2.38 Days
Daily		  
25-Nov-25 08:00 28-Nov-25 16:00 ENMAX IO Protection & Control (SS-1) initial energization 1.1TR 3.33 Days
Continuous		  
25-Nov-25 08:00 25-Nov-25 17:00 ALTALINK TE 305s Protection & Control (305s Acheson) DSP card replacements 9 Hours
Daily		  
25-Nov-25 08:00 25-Nov-25 17:00 ALTALINK, ATCO, FMGW TE AltaLink Telecom Equipment, 1024s RTU/SCADA (1024s Granlea) MPLS upgrade 9 Hours
Daily		  
25-Nov-25 08:00 25-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment MPLS firmware upgrade 9 Hours
Daily		  
25-Nov-25 08:30 25-Nov-25 13:00 ALTALINK Outage 562s 152 (562s Cypress) ACC visibility project work - breaker alarms splitting 4.5 Hours
Daily		  
25-Nov-25 09:00 25-Nov-25 12:00 ALTALINK Outage 33s 5 (33s Spray) testing 3 Hours
Continuous		  
25-Nov-25 09:00 25-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 58s RTU/SCADA (58s Edson) card failure on site, replace P4LTb modules at both ends of power line carrier 8 Hours
Daily		  
25-Nov-25 09:00 25-Nov-25 11:00 ATCO TE 925s RTU/SCADA (925s Green Stocking), 934s RTU/SCADA (934s Black Fly) upgrading NET 1 and NET 11 SAR OS 2 Hours
Continuous		  
25-Nov-25 09:30 27-Nov-25 16:30 ATCO TE 795s Protection & Control (795s Zama) 795S settings update 2.29 Days
Continuous		  
25-Nov-25 10:00 27-Nov-25 16:00 ATCO TE ATCO Telecom Equipment, 731s Protection & Control (731s Elmworth), 731s RTU/SCADA (731s Elmworth) installation of new steel mono pole. 2.25 Days
Continuous		  
25-Nov-25 10:30 26-Nov-25 16:00 ATCO Outage 783s 701T (783s Cadotte River), 783s 701TD (783s Cadotte River) replace 701TD fused disconnect switch and fuses 29.5 Hours
Continuous		  
25-Nov-25 13:00 25-Nov-25 16:00 ALTALINK, TRANSALTA Outage 33s T2 (33s Spray) testing 3 Hours
Daily		  
25-Nov-25 13:00 25-Nov-25 17:00 ALTALINK Outage 562s 252 (562s Cypress) ACC visibility project work - breaker alarms splitting 4 Hours
Daily		  
25-Nov-25 13:01 25-Nov-25 18:00 ALTALINK Outage 62s C1 (62s Brazeau Plant) ACC visibility upgrades 4.98 Hours
Daily		  
26-Nov-25 08:00 26-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 844s RTU/SCADA (844s AEC Mill) AEC Mill_S_Telecom- LOW BES Firewall Install - Outage to Local Network & SCADA Communications
Loss of 844s RTU for 90 mins.		 9 Hours
Continuous		  
26-Nov-25 08:00 26-Nov-25 17:30 ALTALINK Outage 62s 995X (62s Brazeau Plant), 995L (62s Brazeau Plant Plant - 995AL tap) ACC Visibility Upgrades 9.5 Hours
Daily		  
26-Nov-25 08:00 26-Nov-25 17:00 ALTALINK, ALPAC TE 282s Protection & Control (282s Grassland (Alpac)) standard relay maintenance 9 Hours
Daily		  
26-Nov-25 08:00 28-Nov-25 16:00 ENMAX IO Protection & Control (SS-1) Initial energization 1.2TR 2.33 Days
Continuous		  
26-Nov-25 08:00 28-Nov-25 16:00 ENMAX IO Protection & Control (SS-1) initial energization 1.3TR 2.33 Days
Continuous		  
26-Nov-25 08:00 28-Nov-25 16:00 ENMAX IO Protection & Control (SS-1) initial energization 1.4TR 2.33 Days
Continuous		  
26-Nov-25 08:00 28-Nov-25 16:00 ENMAX IO Protection & Control (SS-1) initial energization new 1 sub diameter Q01, Q02, Q03, Q04 Z32 Bus 138kV, Z31 Bus 138kV 2.33 Days
Continuous		  
26-Nov-25 08:00 26-Nov-25 17:00 ALTALINK TE 13s Protection & Control (13s Deerland) standard relay maintenance 9 Hours
Daily		  
26-Nov-25 08:00 26-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, AltaLink RTU/SCADA (AltaLink) the project is to complete MPLS upgrade at 806S 9 Hours
Daily		  
26-Nov-25 08:00 26-Nov-25 10:00 ENMAX Outage 2B138-D86 (SS-2) breaker trip coil test 2 Hours
Continuous		  
26-Nov-25 08:30 26-Nov-25 13:00 ALTALINK Outage 562s 1052 (562s Cypress) ACC visibility project work 4.5 Hours
Daily		  
26-Nov-25 08:30 26-Nov-25 17:00 ALTALINK TE 409s Protection & Control (409s Shell Scotford) maintenance on ALC01L A87/21/L4 & ALC01L B87/21/L4 8.5 Hours
Daily		  
26-Nov-25 08:30 26-Nov-25 11:30 ALTALINK TE 510s Protection & Control (510s Sunnybrook) card replacements 3 Hours
Daily		  
26-Nov-25 09:00 28-Nov-25 16:00 ATCO Outage 13L50L2 (2029s Heathfield - 2075s Newell) repair Shield wire that has broken strands
 2.29 Days
Continuous		  
26-Nov-25 09:00 26-Nov-25 17:30 ALTALINK TE 177s 20 (177s West Cascade) Cutover of 177s20 A/B controls and indication to new RTU. Since we cannot open 177s20, we'll need to be able to decouple the 177s20 mech and operate the motor from the new A/B module and check status contacts. 8.5 Hours
Daily		  
26-Nov-25 09:00 26-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 801s RTU/SCADA (801s Anderson) Anderson_S-Telecom- MED BES Firewall Install - Outage to Local Network & SCADA Communications.
801s RTU Outage for 90 mins expected.		 8 Hours
Continuous		  
26-Nov-25 09:00 26-Nov-25 17:00 ATCO TE ATCO Telecom Equipment connecting new rectifiers 8 Hours
Continuous		  
26-Nov-25 09:00 27-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 731s RTU/SCADA (731s Elmworth) low bes firewall install 1.33 Days
Continuous		  
26-Nov-25 10:00 26-Nov-25 13:00 ENMAX Outage 2B138-D87 (SS-2) breaker trip coil test 3 Hours
Continuous		  
26-Nov-25 11:00 26-Nov-25 15:00 ALTALINK TE 438s RTU/SCADA (438s Westlock), AltaLink Telecom Equipment 9374R MPLS node updates. Loss of visibility of 438s for 4 hours in the timeframe indicated. All TPR reroute in <50ms. 4 Hours
Daily		  
26-Nov-25 12:30 26-Nov-25 16:00 ALTALINK TE 19s Protection & Control (19s Wabamun) DSP card replacements 3.5 Hours
Daily		  
26-Nov-25 13:00 26-Nov-25 17:00 ALTALINK Outage 562s 1152 (562s Cypress) ACC Visibility project work - Breaker alarms splitting. 4 Hours
Daily		  
26-Nov-25 13:00 26-Nov-25 16:00 ENMAX Outage 2B138-D88 (SS-2) breaker trip coil test 3 Hours
Continuous		  
26-Nov-25 23:00 27-Nov-25 03:00 ALTALINK Outage 62s T1 (62s Brazeau Plant) maintenance 4 Hours
Continuous		  
27-Nov-25 03:00 27-Nov-25 07:00 ALTALINK Outage 62s T2 (62s Brazeau Plant), 62s 2 (62s Brazeau Plant) maintenance 4 Hours
Daily		  
27-Nov-25 08:00 27-Nov-25 17:00 ATCO, ALTALINK, SHELL TE ATCO Telecom Equipment, 402s RTU/SCADA (402s Scotford Expansion 1) Scotford (AUS) S-Telecom
LOW BES firewall install
 9 Hours
Continuous		  
27-Nov-25 08:00 27-Nov-25 11:00 ALTALINK Outage 409s 20 (409s Shell Scotford) remove trips from 409s20 3 Hours
Daily		  
27-Nov-25 08:00 27-Nov-25 15:30 ALTALINK Outage 790L (432s Carvel - 790AL tap), 432s 790 (432s Carvel) replace failing tank heater 7.5 Hours
Daily		  
27-Nov-25 08:00 27-Nov-25 17:00 ATCO TE 710s 703T (710s Vermilion) scada cutover of the 703T tap changer and will need to tap up and down the transformer to check controls and position 9 Hours
Continuous		  
27-Nov-25 08:00 28-Nov-25 16:00 ENMAX IO Protection & Control (SS-1) initial energization new 1 sub 8kV AIS J bus, K bus, transfer buses. Transfer J bus to 1.1TR 1.33 Days
Continuous		  
27-Nov-25 08:00 28-Nov-25 16:00 ATCO RB 7L46 (813s Little Smoky - 845s Big Mountain) high load move 7L46 str 158 1.33 Days
Continuous		  
27-Nov-25 08:00 28-Nov-25 16:00 ATCO RB 7L45 (798s Bridge Creek - 845s Big Mountain), 7L45 (798s Bridge Creek - 813s Little Smoky) high load move 7L45 str 158 1.33 Days
Continuous		  
27-Nov-25 08:00 27-Nov-25 17:00 ALTALINK TE AltaLink Telecom Equipment, 255s RTU/SCADA (255s Vulcan) MPLS firmware upgrade 9 Hours
Daily		  
27-Nov-25 08:00 01-Dec-25 18:00 ENMAX Outage 33.84L (SS-33 - SS-43) kls needs to cross the direct buried line with water services for a new high rise 4.42 Days
Continuous		  
27-Nov-25 08:00 27-Nov-25 10:00 ENMAX Outage 2B138-D89 (SS-2) breaker trip coil test - 2B138-D89 2 Hours
Continuous		  
27-Nov-25 08:00 27-Nov-25 16:00 ENMAX TE 21.1TR (SS-21) 21.1TR A protection outage and settings changes 8 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 730.33 Days
Daily		  
27-Nov-25 10:01 27-Nov-25 13:00 ENMAX Outage 2B138-D90 (SS-2) breaker trip coil test - 2B138-D90 2.98 Hours
Continuous		  
27-Nov-25 13:01 27-Nov-25 16:00 ENMAX Outage 2B138-D85 (SS-2) Breaker Trip Coil Test - 2B138-D85 2.98 Hours
Continuous		  
28-Nov-25 06:15 28-Nov-25 17:45 ALTALINK, DOW Outage 862L (166s Dow Chemical Fort Saskatchewan - 258s Dow Hydrocarbons), 166s 862N (166s Dow Chemical Fort Saskatchewan) line move to modify the existing alignment between structures 9-10 11.5 Hours
Daily		  
28-Nov-25 08:00 07-Dec-25 16:00 Syncrude, ATCO Outage RL2 (848s Ruth Lake - D05), D05 512 (D05), D05 513 (D05), D05 512B (D05), D05 513B (D05), 848s RL-2D1 (848s Ruth Lake) D05 substation zone 3 260 kV maintenance 9.33 Days
Continuous		  
28-Nov-25 08:00 28-Nov-25 17:00 ATCO TE 918s Protection & Control (918s Bauer) block 85-1 (Sel 2506) to send DTT to 710s Vermilion, testing coms for the new 7L129 protection at 710s related to 1-00490432 9 Hours
Continuous		  
28-Nov-25 08:00 28-Nov-25 16:00 ENMAX Outage 2.82L (SS-2 - SS-5), 5B138-2.82 (SS-5) investigate sagging cables in manhole 8 Hours
Continuous		  
28-Nov-25 08:00 28-Nov-25 16:00 ENMAX IO Protection & Control (SS-1) new 1sub 1.84L infeed bus, after soak test is complete open and ground bus section in preparation for future line work 8 Hours
Continuous		  
28-Nov-25 08:00 28-Nov-25 16:00 ENMAX IO Protection & Control (SS-1) new 1sub 1.80L infeed bus, after soak test is complete open and ground bus section in preparation for future line work 8 Hours
Continuous		  
28-Nov-25 08:00 28-Nov-25 16:00 ENMAX IO Protection & Control (SS-1) new 1sub 1.81L infeed bus, after soak test is complete open and ground bus section in preparation for future line work 8 Hours
Continuous		  
28-Nov-25 08:00 28-Nov-25 16:00 ENMAX IO Protection & Control (SS-1) new 1sub 1.82L infeed bus, after soak test is complete open and ground bus section in preparation for future line work 8 Hours
Continuous		  
28-Nov-25 08:00 28-Nov-25 12:00 ENMAX Outage 2B138-D83 (SS-2) breaker trip coil test - 2B138-D83 4 Hours
Continuous		  
28-Nov-25 09:00 28-Nov-25 17:00 ATCO TE ATCO Telecom Equipment, 898s Heart Lake RTU/SCADA Heart Lake_S-telecom- MED BES firewall install - outage to local network & SCADA communications 8 Hours
Continuous		  
28-Nov-25 12:01 28-Nov-25 16:00 ENMAX Outage 2B138-D84 (SS-2) breaker trip coil test - 2B138-D84 3.98 Hours
Continuous		  
28-Nov-25 18:00 30-Nov-25 08:00 ENMAX, ALTALINK Outage 936L (5s East Calgary - 102s Langdon) reconductor between str 15 to 18 on both circuits for line clearance mitigation 1.58 Days
Continuous		  
28-Nov-25 18:00 30-Nov-25 08:00 ENMAX, ALTALINK Outage 937L (5s East Calgary - 102s Langdon) working in vicinity of 936L 1.58 Days
Continuous		  
28-Nov-25 18:00 30-Nov-25 08:00 ENMAX, ALTALINK Outage 937L (5s East Calgary - 102s Langdon), 5s 1552 (5s East Calgary), 5s 1652 (5s East Calgary) working in vicinity of 936L 1.58 Days
Continuous		  
28-Nov-25 18:00 30-Nov-25 08:00 ENMAX, ALTALINK IO 936L (5s East Calgary - 102s Langdon) reconductor between str 15 to 18 on both circuits for line clearance mitigation 1.58 Days
Continuous		  

Prepared On:   2025-11-19   15:45:43

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