Alberta Electric System Operator
System Co-ordination Plan
2025-08-14 to 2025-08-22
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		  
10-Feb-25 00:00 23-Dec-25 23:00 ATCO, ALTALINK IO 840s McNeill Station, 830L (562s Cypress - 840s McNeill Station), 840s 701T (840s McNeill Station), 840s 901T (840s McNeill Station) available for emergency use only 316.96 Days
Continuous		 AB-SK
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 03-Oct-25 17:00 EPCOR Outage 987s T1 (987s Clover Bar), 987s CCP7213 (987s Clover Bar), 987s CCP7214 (987s Clover Bar) Cloverbar - TX1 LCR 186.42 Days
Continuous		  
31-Mar-25 07:00 29-Aug-25 17:00 EPCOR TE 987s Protection & Control (987s Clover Bar) Cloverbar: protection blocking, 240 kV bus 3 differential for TX1 LCR duration 151.42 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		  
09-Jun-25 07:00 15-Aug-25 17:00 EPCOR TE Protection & Control (Poundmaker) protection blocking for relay maintenance 67.42 Days
Continuous		  
13-Jun-25 17:00 11-Feb-26 17:00 EPCOR Outage T3 (Rossdale) Rossdale - TX3 LCR 243.04 Days
Continuous		  
05-Jul-25 08:00 05-Sep-25 16:00 ENMAX TE Protection & Control (SS-21) 21sub auto switching protection outage, 21.1TR replacement 62.33 Days
Daily		  
07-Jul-25 08:00 05-Sep-25 16:00 ENMAX Outage 21.1TR (SS-21) 21.1TR replacement 60.33 Days
Continuous		  
12-Jul-25 08:00 18-Sep-25 16:00 ENMAX Outage 14.1C (SS-14), 14.2C (SS-14) capacitor bank switcher replacement 68.33 Days
Continuous		  
14-Jul-25 08:00 27-Sep-25 17:00 ALTALINK TE 294s RTU/SCADA (294s Brazeau Outletworks) RTU database updates 75.38 Days
Daily		  
16-Jul-25 07:00 19-Sep-25 17:00 NWE Outage 2366 (NWE Marias) install new equipment at Marias 65.42 Days
Continuous		 AB-MATL
17-Jul-25 08:30 31-Aug-25 16:30 ALTALINK Outage 74s C3 (74s Janet) forced outage 45.33 Days
Daily		  
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 22-Aug-25 17:00 EPCOR Outage T2 (EP Riverview) bushing test failure (found during OE110184) 28 Days
Continuous		  
29-Jul-25 08:00 25-Sep-25 17:00 ALTALINK, TRANSALTA Outage 33s 2 (33s Spray), 33s T2 (33s Spray) maintenance 58.38 Days
Continuous		  
30-Jul-25 14:00 28-Aug-25 07:30 ALTALINK, BCH Outage 799s T1 (799s Coleman), 799s 138kV Bus (799s Coleman), 786L (799s Coleman - BCH Natal), 799s 786W (799s Coleman), 1D24 (BCH Natal) pile repair at s1 and s25 and install back on new foundation and adjust switches 28.73 Days
Continuous		 AB-BC
01-Aug-25 10:00 02-Sep-25 17:00 ALTALINK Outage 294s T2 (294s Brazeau Outlet Works) transformer replacement and maintenance 32.29 Days
Continuous		  
02-Aug-25 23:30 12-Sep-25 18:00 ATCO Outage 827s SVC (827s Cranberry Lake) forced outage 40.77 Days
Continuous		  
03-Aug-25 14:01 18-Aug-25 14:00 ATCO Outage 7L162 (729s Otauwau - 732s Mitsue), 732s 705 (732s Mitsue), 732s 706 (732s Mitsue), 729s 704 (729s Otauwau), 732s 7L162D1 (732s Mitsue) protection upgrade, remove old protection, cut over to new protection and cut over equipment status, control and alarms to new station controller 15 Days
Continuous		  
08-Aug-25 08:00 18-Aug-25 20:00 SUNCOR Outage 29PL9-15 (29EDD-34 - 29EDD-56), 29EDD-56 29PT-190 (29EDD-56), 29EDD-56 952-501 (29EDD-56) 29EDD-56;29PT-190 SYSTEM;PM 5y; 29EDD56;29PP-41H SYSTEM;PM 5Y/10Y 10.5 Days
Continuous		  
11-Aug-25 00:00 29-Aug-25 17:00 BCH Outage 5L98 (BCH Nicola - BCH Vaseux Lake) replace spacers and marker balls 18.71 Days
Continuous		 AB-BC
11-Aug-25 07:00 22-Aug-25 17:00 EPCOR Outage EP 511s Victoria T3 (EP 511s Victoria), EP 511s V724 (EP 511s Victoria), EP 511s V725 (EP 511s Victoria), EP 511s V722 (EP 511s Victoria) VDS11/VDS12/VAB3 disconnect maintenance 11.42 Days
Continuous		  
11-Aug-25 07:00 17-Aug-25 17:00 EPCOR Outage EP 803s L2401 (EP 803s Lambton), EP 803s L2402 (EP 803s Lambton), EP 803s T1 (EP 803s Lambton), S724 (Strathcona) LAB1/LDS2/LDS3 disconnect maintenance 6.42 Days
Continuous		  
11-Aug-25 07:00 29-Aug-25 17:00 EPCOR Outage 72VN21 (EP 511s Victoria - Namao), N725 (Namao) VN21: Pole LCR 18.42 Days
Continuous		  
11-Aug-25 07:00 24-Aug-25 17:00 EPCOR, ALTALINK Outage 657s T1 (657s Summerside), 657s SU2404 (657s Summerside), 657s SU2405 (657s Summerside) TX1 DGA apparatus Install, doble/disconnect maintenance and P&C/SCADA DGA commissioning 13.42 Days
Continuous		  
11-Aug-25 07:00 15-Aug-25 17:00 ALTALINK, EPCOR Outage 1045L (EP 805s Jasper - 1045AL tap), 1045L (310p Sundance - 1045AL tap), 1045AL (320p Keephills - 1045L tap), EP 805s J2407 (EP 805s Jasper), EP 805s J2406 (EP 805s Jasper), 320p 1352 (320p Keephills) infrastructure upgrade project 4.42 Days
Continuous		  
11-Aug-25 07:00 15-Aug-25 18:00 ALTALINK, EPCOR Outage 1045AL (320p Keephills - 1045L tap), 1045L (310p Sundance - 1045AL tap), 1045L (EP 805s Jasper - 1045AL tap) infrastructure upgrade project 4.46 Days
Continuous		  
11-Aug-25 07:00 15-Aug-25 17:00 EPCOR Outage 72RG1 (Garneau - Rossdale), G724 (Garneau), G725 (Garneau), RG7210 (Rossdale) Garneau metering upgrade cutovers 4.42 Days
Continuous		  
11-Aug-25 07:00 14-Aug-25 17:00 ALTALINK TE 86s Protection & Control (86s Bigstone) 914L (86s-87s) line protection outage to update telecom channels, relay settings, perform end to end testing. 3.42 Days
Continuous		  
11-Aug-25 07:00 14-Aug-25 17:00 ALTALINK TE 87s Protection & Control (87s Gaetz), 914L (86s Bigstone - 87s Gaetz) update telecom channels, relay settings, perform end to end testing 3.42 Days
Continuous		  
11-Aug-25 07:00 17-Aug-25 19:00 ATCO RB 9L20 (755s Cordel - 766s Nevis) hold off on 9l20 to complete construction activities on CETO project adjacent to 9L20 6.5 Days
Daily		  
11-Aug-25 07:00 14-Aug-25 17:00 ALTALINK TE 87s RTU/SCADA (87s Gaetz) update RTU configuration for 914L analog TPR upgrade 3.42 Days
Daily		  
11-Aug-25 07:00 14-Aug-25 17:00 ALTALINK TE 86s RTU/SCADA (86s Bigstone) update RTU configuration for 914L analog TPR upgrade 3.42 Days
Daily		  
11-Aug-25 08:00 14-Aug-25 13:00 ALTALINK, TRANSALTA Outage 33s 138kV Bus (33s Spray), 33s T1 (33s Spray), 33s T2 (33s Spray), 33s 76 (33s Spray), 33s 113 (33s Spray), 33s 84 (33s Spray), 33s 2 (33s Spray), 33s 1 (33s Spray) replace 33s1 ct13 all 3 phases. remove old tau communication cable 3.21 Days
Continuous		  
11-Aug-25 08:00 27-Aug-25 17:00 ALTALINK TE 233s RTU/SCADA (233s Beamer) update config for metering upgrades. restoration time 5 minutes 16.38 Days
Daily		  
11-Aug-25 08:00 14-Aug-25 16:00 ENMAX IO Protection & Control (SS-37) 37 sub STATION SERVICE Transformer outage. cut in new station service transformers for old and new building and add ats 3.33 Days
Continuous		  
11-Aug-25 08:00 15-Aug-25 17:30 ALTALINK TE 678s Protection & Control (678s Okotoks) major SCADA upgrade project 4.4 Days
Daily		  
11-Aug-25 08:00 15-Aug-25 17:30 ALTALINK TE 678s RTU/SCADA (678s Okotoks) major scada upgrade project. replacement of D20 RTU with new SG-4260 data concentrator 4.4 Days
Daily		  
11-Aug-25 08:00 15-Aug-25 17:00 ALTALINK TE 347s Protection & Control (347s Fox Creek) protection outages on A87/138B, & B87/138B for battery charger move 4.38 Days
Daily		  
11-Aug-25 08:00 15-Aug-25 17:30 ALTALINK Outage 217s C1 (217s North Red Deer) replace perimeter fence 4.4 Days
Continuous		  
11-Aug-25 09:00 21-Aug-25 18:00 ALTALINK Outage 799L (235s Entwistle - 443s South Mayerthorpe), 235s 799N (235s Entwistle) 799L rebuild (Str 731-830) 10.38 Days
Continuous		  
11-Aug-25 09:30 14-Aug-25 16:30 ATCO Outage 7L92 (709s Vegreville - 7LA92 tap), 709s 705 (709s Vegreville) interphase spacers and climbing inspection 3.29 Days
Continuous		  
11-Aug-25 10:00 14-Aug-25 17:30 ATCO Outage 813s 901T (813s Little Smoky) prc-005 - spr testing - transformer 901T 3.31 Days
Continuous		  
11-Aug-25 10:30 14-Aug-25 17:30 ALTALINK Outage 87s T2 (87s Gaetz) prc005 doble, maintenance, leaks 3.29 Days
Continuous		  
11-Aug-25 11:00 14-Aug-25 17:00 ALTALINK TE 28s Protection & Control (28s West Brooks) maintenance 3.25 Days
Daily		  
11-Aug-25 11:00 14-Aug-25 17:00 ALTALINK TE 405s RTU/SCADA (405s Waupisoo) rtu database update 3.25 Days
Daily		  
11-Aug-25 11:30 14-Aug-25 16:30 ALTALINK TE 159s Protection & Control (159s Colinton) card replacement/testing, fiber replacement, qualified switchman on site for the duration 3.21 Days
Daily		  
11-Aug-25 11:30 14-Aug-25 16:30 ALTALINK TE 159s RTU/SCADA (159s Colinton) rtu database update, qualified switchman on site for the duration 3.21 Days
Daily		  
11-Aug-25 12:00 19-Aug-25 17:00 ALTALINK Outage 233s T1 (233s Beamer) replace SS1, install bird cover on low side bushings, replace and decommission transducer meter modules, install new meters and commission. 233s35 (2115L) protection maintenance, nutrien trip testing 8.21 Days
Continuous		  
11-Aug-25 12:30 15-Aug-25 18:00 ALTALINK Outage 410s T2 (410s Josephburg) replace h2 bushing, doble, maint, oil leaks 4.23 Days
Continuous		  
11-Aug-25 12:30 14-Aug-25 17:30 ALTALINK Outage 405s C2 (405s Waupisoo), 405s 23 (405s Waupisoo) c2 'a' protection upgrade, techs will be replacing the protection and testing functionality to 405s23 3.21 Days
Continuous		  
12-Aug-25 09:00 14-Aug-25 16:00 ATCO TE 951s Protection & Control (951s Thickwood Hills), 951s RTU/SCADA (951s Thickwood Hills) automation & SCADA @ 951S-APL 2.29 Days
Continuous		  
13-Aug-25 08:00 14-Aug-25 16:00 ENMAX Outage 21.61L (SS-21 - SS-34), 34B69-21.61 (SS-34), 21B69-21.61 (SS-21) HV breaker maintenance 1.33 Days
Continuous		  
13-Aug-25 08:00 14-Aug-25 16:00 ATCO TE 802s Protection & Control (802s Michichi Creek) firmware upgrade for SEL-2414 transformer monitor relay - 701T at 802s Michichi 1.33 Days
Continuous		  
13-Aug-25 08:30 14-Aug-25 17:30 ALTALINK Outage 526s C1 (526s Buffalo Creek) 138kV breaker maintenance 1.38 Days
Daily		  
13-Aug-25 08:30 14-Aug-25 14:00 ATCO Outage 786s 701TCS (786s High Level), 786s 701T (786s High Level), 786s 505C (786s High Level), 786s 506C (786s High Level) bird proofing and bus work 29.5 Hours
Continuous		  
13-Aug-25 09:00 18-Aug-25 20:00 SUNCOR Outage 29PL6-2 (30EDD-1 - 29EDD-55) 29PT-165 maintenance 5.46 Days
Continuous		  
13-Aug-25 09:30 14-Aug-25 17:30 ATCO Outage 6L05 (757s Battle River - 843s Bigknife Creek), 757s 602 (757s Battle River) breaker partial testing 1.33 Days
Continuous		  
13-Aug-25 09:30 14-Aug-25 17:00 ATCO Outage 7L121 (917s Horse River - 7LA121 tap), 917s 705 (917s Horse River) breaker testing 31.5 Hours
Continuous		  
14-Aug-25 06:00 16-Aug-25 17:45 ALTALINK Outage 712L (99s North St. Albert - 595s Spruce Grove), 99s 712X (99s North St. Albert), 595s 712 (595s Spruce Grove) install concrete caisson foundations for structures 2.49 Days
Continuous		  
14-Aug-25 08:00 19-Aug-25 18:00 SUNCOR Outage 29EDD-85 752-10020 (29EDD-85) maintenance, Aph gas levels 5.42 Days
Continuous		  
14-Aug-25 08:00 21-Aug-25 16:00 ENMAX, ALTALINK Outage 20.82L (SS-20 - SS-21), 21.80L (42s Sarcee - SS-21), 21.1TR (SS-21), 21.4TR (SS-21), 21B138-20.82 (SS-21), 21B138-21.80 (SS-21) 21.1TR replacement 7.33 Days
Continuous		  
14-Aug-25 08:00 21-Aug-25 16:00 ENMAX, ALTALINK Outage 21.80L (42s Sarcee - SS-21) 21.1TR replacement 7.33 Days
Continuous		  
14-Aug-25 08:00 21-Aug-25 16:00 ENMAX Outage 21.1C (SS-21) 21.1TR replacement, outage required for 21sub 138kV bus differential protection outage 7.33 Days
Continuous		  
14-Aug-25 08:00 21-Aug-25 16:00 ENMAX TE Protection & Control (SS-21) 21sub 138kV bus differential protection outage 7.33 Days
Daily		  
14-Aug-25 09:00 14-Aug-25 17:00 ATCO Outage 876s 901T (876s Brintnell) investigate ground fault on gas trip 8 Hours
Continuous		  
14-Aug-25 09:00 14-Aug-25 10:00 CMH TE MHS-9 RTU/SCADA (MHS-9 South Saskatchwan), APS# 616 CMH T11 and T71 Transformer Overload Mitigation Scheme communications outage 60 Mins
Continuous		  
14-Aug-25 10:00 14-Aug-25 16:00 ATCO TE ATCO Telecom Equipment touchwood t-telecom pm on the iru radios 6 Hours
Continuous		  
14-Aug-25 10:00 14-Aug-25 16:00 ALTALINK IO AltaLink Telecom Equipment Touchwood T-Telecom PM on the IRU radios 6 Hours
Daily		  
14-Aug-25 14:00 25-Sep-25 17:00 ALTALINK Outage 33s 3 (33s Spray) condition assessment and T1 compliance testing 42.13 Days
Continuous		  
15-Aug-25 08:00 15-Aug-25 12:00 ENMAX Outage 24.81L (SS-24 - SS-31), 24B138-24.81 (SS-24), SW81 (SS-31), 24MD138-24.1TR (SS-24), 24B138-24BT3 (SS-24), 24B138-24.83 (SS-24) HV breaker SF6 gas sample - 24B138-24.81. 24B138-24.81 breaker racking support install 4 Hours
Continuous		  
15-Aug-25 08:00 15-Aug-25 09:00 ALTALINK TE AltaLink Telecom Equipment NOC needs to change the Quality Of Service (QOS) of this for configuration alignment. 60 Mins
Daily		  
15-Aug-25 10:00 15-Aug-25 16:00 ATCO TE 846s Protection & Control (846s Grand Centre)
replace defective tapchanger controller.
Isolate, replace, commission		 6 Hours
Continuous		  
15-Aug-25 12:01 15-Aug-25 16:00 ENMAX Outage 26.83L (SS-26 - SS-65), 26B138-26.83 (SS-26), 65MD138-26.83 (SS-65) 26B138-26.83 broken counter - repair/replace 3.98 Hours
Continuous		  
16-Aug-25 08:00 16-Aug-25 18:00 ENMAX Outage 13.2TR (SS-13) tap changer inspection - 13.2, investigate gas alarm circuit 10 Hours
Continuous		  
16-Aug-25 08:30 16-Aug-25 14:30 ALTALINK Outage 828L (178s Cynthia - 489s Petro-Canada Brazeau River), 178s 828X (178s Cynthia) remove PCB ballast fixture on steel structure adjacent to 178s31 6 Hours
Daily		  
17-Aug-25 06:00 20-Aug-25 18:00 ALTALINK Outage 860L (44s Bearspaw Plant - 291s Cochrane), 291s 860 (291s Cochrane), 44s 860W (44s Bearspaw Plant) installing a concrete caisson at new structures 51 and 51A 3.5 Days
Continuous		  
18-Aug-25 07:00 21-Aug-25 17:00 ALTALINK TE 86s RTU/SCADA (86s Bigstone) update RTU config for 914L analog TPR upgrade 3.42 Days
Daily		  
18-Aug-25 07:00 21-Aug-25 17:00 ALTALINK TE 87s RTU/SCADA (87s Gaetz) update RTU config for 914L analog TPR upgrade 3.42 Days
Daily		  
18-Aug-25 07:00 21-Aug-25 17:00 ALTALINK TE 86s Protection & Control (86s Bigstone) 914L (86s-87s) line protection outage to update telecom channels, relay settings, perform end to end testing 3.42 Days
Continuous		  
18-Aug-25 07:00 21-Aug-25 17:00 ALTALINK TE 87s Protection & Control (87s Gaetz) 914L (86s-87s) line protection outage to update telecom channels, relay settings, perform end to end testing 3.42 Days
Continuous		  
18-Aug-25 07:00 17-Oct-25 17:00 EPCOR Outage T2 (Garneau), GT2 (Garneau) garneau S/S Tx2 bay outage, repair w/vendor 60.42 Days
Continuous		  
18-Aug-25 07:00 24-Aug-25 19:00 ATCO RB 9L20 (755s Cordel - 766s Nevis) complete construction activities on CETO project adjacent to 9L20 6.5 Days
Daily		  
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		  
18-Aug-25 08:00 25-Aug-25 16:00 ATCO Outage 7L56 (738s Virginia Hills - 809s Louise Creek) Installing Vibration Damper on the line
Due to 7L56D6 being deamed as Dead Line Only, we will be having a momentary outage to 725S and 738S to open/close the D6 switch		 7.33 Days
Continuous		  
18-Aug-25 08:00 19-Aug-25 16:00 ENMAX Outage 15.62L (SS-15 - SS-16), 16B69-15.62 (SS-16), 15B69-15.62 (SS-15) breaker maintenance - 16B69-15.62 1.33 Days
Continuous		  
18-Aug-25 08:00 20-Aug-25 16:00 ATCO, AIRLIQUIDE Outage ALC03L (402s Scotford Expansion One - 408s Air Liquide Scotford), 408s 52-A45 (408s Air Liquide Scotford), 408s 52-A51 (408s Air Liquide Scotford) maintenance testing, function testing, cleaning, lubrication and inspection at 408s 2.33 Days
Continuous		  
18-Aug-25 08:00 28-Aug-25 18:00 ENMAX Outage 37.2TR (SS-37) equipment inspections and maintenance 10.42 Days
Continuous		  
18-Aug-25 08:00 08-Sep-25 17:00 ALTALINK, TRANSALTA Outage 35s T1 (35s Rundle Plant), 35s T2 (35s Rundle Plant), 35s T3 (35s Rundle Plant), 85L (35s Rundle Plant - 54L tap), 84L (33s Spray - 35s Rundle Plant) maintenance 21.38 Days
Continuous		  
18-Aug-25 08:00 18-Aug-25 16:00 ATCO TE ATCO Telecom Equipment, 705s RTU/SCADA (705s Kitscoty) Kitscoty_T-Telecom-Kitscoty Sub to Kitscoty Tower Aprisa XE PM. Loss of 705s KITSCOTY RTU for the outage duration. 8 Hours
Continuous		  
18-Aug-25 08:00 20-Aug-25 16:00 ENMAX Outage 37.3TR (SS-37) training on switchgear and cell bonding 2.33 Days
Continuous		  
18-Aug-25 09:00 18-Aug-25 12:00 ENMAX TE 13.82L (SS-13 - SS-22) 13.82L A and B Line Protection Outage. Transfer from JMUX to JPAX circuits. Back-up protection fault clearing time 26.5 cycles. 3 Hours
Continuous		  
18-Aug-25 09:30 19-Aug-25 17:30 ATCO Outage 757s 603 (757s Battle River), 6L03 (757s Battle River - 6L17 tap) breaker bulk oil FKP complete testing - 603 @ 757S 1.33 Days
Continuous		  
18-Aug-25 09:30 21-Aug-25 17:30 ATCO Outage 801s 911 (801s Anderson) BREAKER MIN OIL HLR COMPLETE TESTING - 911 @ 801S 3.33 Days
Continuous		  
18-Aug-25 09:30 19-Aug-25 17:30 ATCO Outage 813s 717 (813s Little Smoky) breaker complete testing - 717 @ 813S 1.33 Days
Continuous		  
18-Aug-25 10:00 18-Aug-25 16:00 ATCO TE ATCO Telecom Equipment, 716s RTU/SCADA (716s Lloydminster) maintenance on the XE radios 6 Hours
Continuous		  
18-Aug-25 10:00 20-Aug-25 17:00 ATCO TE 898s Heart Lake RTU/SCADA configuration update on RTU and SEL 2032 to implement ITM trip supervision 2.29 Days
Continuous		  
18-Aug-25 10:00 18-Aug-25 13:00 Lethbridge TE 146s RTU/SCADA (146s Macdonald) SCADA outage required at 146s Substation in order to replace wiring to Digital Input & Analog Input Cards. The cabling on the Scout RTU is too tight to accommodate the wiring of the new RTAC to be installed in the same cabinet. Didn't notice issue until contractor was on site. 3 Hours
Continuous		  
18-Aug-25 10:30 19-Aug-25 17:30 ATCO, ALTALINK RB 9L960 (13s Deerland - 825s Whitefish Lake) repair damaged tower members found during inspection on 9L960/9L961 Structure #52 31 Hours
Continuous		  
18-Aug-25 10:30 19-Aug-25 17:30 ATCO, ALTALINK RB 9L961 (13s Deerland - 825s Whitefish Lake) repair damaged tower members found during inspection on 9L960/9L961 Structure #52 31 Hours
Continuous		  
18-Aug-25 11:00 26-Aug-25 16:00 ATCO Outage 898s 902T (898s Heart Lake), 898s 704 (898s Heart Lake), 898s 708 (898s Heart Lake) transformer maintenance 8.21 Days
Continuous		  
18-Aug-25 11:00 19-Aug-25 17:00 ATCO Outage 7L133 (786s High Level - 828s Sulphur Point), 786s 704 (786s High Level), 828s 703 (828s Sulphur Point) breaker maintenance 704 @ 786S 30 Hours
Continuous		  
18-Aug-25 11:00 26-Aug-25 16:00 ATCO TE 898s Protection & Control (898s Heart Lake) settings changes and wiring updates to 87T-A/50/51-TV -- 902T, 50-51-51N-59N/902T and ITM/902T for ITM trip supervision project 8.21 Days
Continuous		  
18-Aug-25 11:00 18-Aug-25 15:30 ALTALINK Outage 527s T1 (527s Coal Valley) remove PCB ballast fixture on 527s1 structure 4.5 Hours
Daily		  
18-Aug-25 11:00 18-Aug-25 17:00 ALTALINK TE 217s Protection & Control (217s North Red Deer) techs to isolate trips associated with CT4 6 Hours
Daily		  
18-Aug-25 11:00 18-Aug-25 17:00 ALTALINK TE 257s Protection & Control (257s Hull) relay maintenance on 27/BAT1 & 87/138B 6 Hours
Daily		  
18-Aug-25 11:00 21-Aug-25 17:00 ALTALINK TE 45s RTU/SCADA (45s Bretona) RTU database update 3.25 Days
Daily		  
18-Aug-25 11:00 19-Aug-25 17:00 ATCO, ALTALINK RB 9L960 (13s Deerland - 825s Whitefish Lake) repair Damaged tower members found during inspection. 9L960/9L961 Structure 52 30 Hours
Continuous		  
18-Aug-25 11:00 19-Aug-25 17:00 ATCO, ALTALINK RB 9L961 (13s Deerland - 825s Whitefish Lake) repair damaged tower members on 9L960/9L961 structure 52 30 Hours
Continuous		  
18-Aug-25 12:00 19-Aug-25 17:00 ATCO Outage 917s 706C (917s Horse River) breaker SF6 LTB145D1/B complete testing - 706 @ 917S 29 Hours
Continuous		  
18-Aug-25 12:00 19-Aug-25 17:00 ALTALINK TE 233s Protection & Control (233s Beamer) install 233sT1 tripping module 29 Hours
Daily		  
18-Aug-25 12:00 18-Aug-25 17:00 ALTALINK TE 233s RTU/SCADA (233s Beamer) update configuration for 233sT1 & 233sT2 tripping module 5 Hours
Daily		  
18-Aug-25 12:30 21-Aug-25 17:30 ALTALINK Outage 325s T1 (325s Leduc) doble and maintenance 3.21 Days
Continuous		  
18-Aug-25 12:30 28-Aug-25 17:30 ALTALINK Outage 217s 778E (217s North Red Deer), 778L (87s Gaetz - 217s North Red Deer) Replacing CT4 & 217s778E with a new dead tank breaker which will have the new CTs 10.21 Days
Continuous		  
18-Aug-25 13:00 25-Aug-25 10:00 ATCO, ALTALINK RB 6L530 (104s Watson Creek - 2085s Sheridan) climbing Inspection 6.88 Days
Continuous		  
18-Aug-25 13:00 25-Aug-25 10:00 ATCO, ALTALINK RB 530L (104s Watson Creek - 2085s Sheridan) climbing Inspection 6.88 Days
Daily		  
18-Aug-25 13:00 21-Aug-25 15:00 ATCO RB 7L79 (771s Veteran - 932s Pemukan), 7L79 (771s Veteran - 892s Ribstone Creek) install frost mitigation inter-phase spacers 3.08 Days
Continuous		  
18-Aug-25 13:00 19-Aug-25 16:00 ATCO TE 939s Protection & Control (939s Livock), 939s RTU/SCADA (939s Livock) CIP update password - automation & SCADA @ 939S-APL 27 Hours
Continuous		  
18-Aug-25 14:00 21-Aug-25 16:00 ALTALINK Outage 336s T1 (336s Fincastle), 336s 752 (336s Fincastle) 336sT1 Doble possible bushing replacement 3.08 Days
Continuous		  
18-Aug-25 14:01 01-Sep-25 14:00 ATCO Outage 732s 704 (732s Mitsue), 732s 705 (732s Mitsue), 732s 901 (732s Mitsue), 732s 902T (732s Mitsue), 732s 906 (732s Mitsue) Protection upgrade. Remove old protection, cut over to new protection and cut over equipment status, control and alarms to new station controller. 14 Days
Continuous		  
19-Aug-25 07:00 23-Aug-25 19:00 ATCO Outage 7L16 (766s Nevis - 948s Heatburg), 766s 702 (766s Nevis), 948s 703 (948s Heatburg) OPGW upgrade on str 7L16-698 to 7L16-712 4.5 Days
Daily		  
19-Aug-25 07:00 22-Aug-25 17:30 ALTALINK Outage 69s T2 (69s North Barrhead), 69s T5 (69s North Barrhead) grounding improvements to T2 3.44 Days
Continuous		  
19-Aug-25 07:30 19-Aug-25 16:30 ALTALINK Outage 233s 807X (233s Beamer), 807L (233s Beamer - 807AL tap) relocate metering function to L2 protections 9 Hours
Daily		  
19-Aug-25 08:00 29-Aug-25 20:00 SUNCOR Outage 29EDD-56 29PT-191 (29EDD-56) maintenance 10.5 Days
Continuous		  
19-Aug-25 08:00 20-Aug-25 18:00 ENMAX Outage 2.3TR (SS-2) tap changer inspection and oil filtration maintenance 1.42 Days
Continuous		  
19-Aug-25 08:00 19-Aug-25 16:00 ALTALINK TE 233s Protection & Control (233s Beamer) relocate metering function to L1 protections 8 Hours
Daily		  
19-Aug-25 08:00 20-Aug-25 17:00 ALTALINK TE 83s Protection & Control (83s Taber) maintenance 1.38 Days
Daily		  
19-Aug-25 08:00 19-Aug-25 17:00 ALTALINK TE AltaLink Telecom Equipment to complete MPLS upgrade and Lan switch replacement 9 Hours
Daily		  
19-Aug-25 08:30 19-Aug-25 17:30 ALTALINK Outage 325s C1 (325s Leduc) breaker maintenance 9 Hours
Daily		  
19-Aug-25 08:30 27-Aug-25 14:30 ALTALINK Outage 178s T1 (178s Cynthia) oil processing 8.25 Days
Continuous		  
19-Aug-25 08:30 21-Aug-25 17:00 ALTALINK TE 320p RTU/SCADA (320P Keephills) RTU database update 2.35 Days
Daily		  
19-Aug-25 09:00 19-Aug-25 10:00 ATCO TE 875s RTU/SCADA (875s Algar), ATCO Telecom Equipment, 917s RTU/SCADA (917s Horse River) Algar/Horse River Telecom

Upgrading SAR to V.21 then V.22

Impact to the following Traffic for approx 30 mins:
Algar Sub Low BES SCADA
Horse River Sub SCADA
7L38A - Algar / Horse River
7L38B - Algar / Horse River		 60 Mins
Continuous		  
19-Aug-25 09:00 19-Aug-25 12:00 ENMAX TE 20.82L (SS-20 - SS-21) A and B line protection outage - transfer from JMUX to JPAX circuits 3 Hours
Continuous		  
19-Aug-25 09:00 19-Aug-25 17:00 ATCO TE ATCO Telecom Equipment, 778s RTU/SCADA (778s Big Valley) replace old SIM card with IoT SIM and re-configure Microhard Modem with NSG 8 Hours
Continuous		  
19-Aug-25 09:30 25-Aug-25 14:30 ATCO RB 7L199 (347s AML Fox Creek - 741s ATC Fox Creek) 347s199W breaker maintenance switch and associated circuits 6.21 Days
Continuous		  
19-Aug-25 09:30 25-Aug-25 14:30 ALTALINK RB 199L (347s AML Fox Creek - 741s ATC Fox Creek) piles and telecom tower install at 347s 6.21 Days
Continuous		  
19-Aug-25 10:00 19-Aug-25 16:00 ATCO TE ATCO Telecom Equipment Paradise Valley preventative maintenance on the XE radios 6 Hours
Continuous		  
19-Aug-25 11:30 25-Aug-25 17:30 ALTALINK, ATCO Outage 912L (63s Red Deer - 766s Nevis), 766s 902 (766s Nevis) repairing 9L912D1 6.25 Days
Continuous		  
19-Aug-25 12:00 25-Aug-25 17:00 ATCO Outage 9L912 (63s Red Deer - 766s Nevis), 766s 9L912D1 (766s Nevis), 766s 902 (766s Nevis) repair 9L912D1 line disconnect switch 6.21 Days
Continuous		  
19-Aug-25 13:00 19-Aug-25 16:00 ENMAX TE 1.80L (SS-1 - SS-28) 1.80L A and B Line Protection Outage. Transfer from JMUX to JPAX circuits. Back-up protection fault clearing time 26.5 cycles. 3 Hours
Continuous		  
20-Aug-25 07:00 21-Aug-25 18:00 ALTALINK TE 308s Protection & Control (308s Albchem Beaverhill Creek), AltaLink Telecom Equipment MPLS node addition 1.46 Days
Daily		  
20-Aug-25 07:00 21-Aug-25 17:00 ALTALINK TE AltaLink Telecom Equipment upgrading existing MW radio capacity 1.42 Days
Continuous		  
20-Aug-25 07:00 20-Aug-25 18:00 ALTALINK IO 535s RTU/SCADA (535s Joffre) Access being requested for the following sites to perform an MPLS Node Addition Upgrade. 535s controls will be off. 11 Hours
Daily		  
20-Aug-25 07:30 20-Aug-25 16:30 ALTALINK Outage 708L (233s Beamer - 708AL tap), 233s 708X (233s Beamer) isolate & demo metering transducers and move metering function to line protection 9 Hours
Daily		  
20-Aug-25 08:00 23-Aug-25 18:00 SUNCOR Outage 29EDD-85 752-10040 (29EDD-85) PRC-5 testing 3.42 Days
Continuous		  
20-Aug-25 08:00 26-Aug-25 16:00 ALTALINK Outage 233s T2 (233s Beamer) replace ss2, install bird cover on low side bushings, replace and decommission transducer meter modules, install new meters and commission, replace distribution protection, trip testing 6.33 Days
Continuous		  
20-Aug-25 08:00 01-Sep-25 17:00 ALTALINK Outage 799s 138kV Bus (799s Coleman), 170L (632s Russell - 799s Coleman), 799s T3 (799s Coleman), 799s 170E (799s Coleman) remove s29 from foundation, repair foundation, install s29 and adjust. Remove 25kV temp feed 12.38 Days
Continuous		 AB-BC
20-Aug-25 08:00 20-Aug-25 16:00 ENMAX Outage 162B240-RB131 (SS-162) hv breaker maintenance - 162b240-rb131, dashpot checks 8 Hours
Continuous		  
20-Aug-25 08:00 28-Aug-25 18:00 ALTALINK Outage 420s 731 (420s Broadmoor) replace 420s731 breaker 8.42 Days
Continuous		  
20-Aug-25 08:00 20-Aug-25 16:00 ALTALINK TE 233s Protection & Control (233s Beamer) relocate metering function to L2 protections 8 Hours
Daily		  
20-Aug-25 08:00 04-Sep-25 16:00 Syncrude Outage D05 76 (D05), D05 76A (D05), D05 76B (D05), Mildred T1 (Syncrude Mildred Lake), Mildred T2 (Syncrude Mildred Lake), Mildred T3 (Syncrude Mildred Lake), Mildred Lake 72kV Bus B (Sycrude Mildred Lake), Mildred T19 (Syncrude Mildred Lake), Mildred T14 (Syncrude Mildred Lake), Mildred T16 (Syncrude Mildred Lake), 1335 (Syncrude Mildred Lake), 135 (Syncrude Mildred Lake), 134 (Syncrude Mildred Lake), 1434 (Syncrude Mildred Lake), 1435 (Syncrude Mildred Lake), 1634 (Syncrude Mildred Lake), 1635 (Syncrude Mildred Lake), 1934 (Syncrude Mildred Lake), 1935 (Syncrude Mildred Lake), 234 (Syncrude Mildred Lake), 2235 (Syncrude Mildred Lake), 334 (Syncrude Mildred Lake), 335 (Syncrude Mildred Lake), 3235 (Syncrude Mildred Lake), 814 (Syncrude Mildred Lake), 815 (Syncrude Mildred Lake), 816 (Syncrude Mildred Lake), 914 (Syncrude Mildred Lake), 915 (Syncrude Mildred Lake), 916 (Syncrude Mildred Lake), 1224A (Syncrude Mildred Lake), 1224B (Syncrude Mildred Lake), 1225 (Syncrude Mildred Lake) 72kV "B" Bus PM at Mildred Lake 15.33 Days
Continuous		  
20-Aug-25 08:00 22-Aug-25 18:00 SUNCOR TE Suncor RTU/SCADA (Suncor), SUNCOR DNP Outage BP(Abin) - Upgrading AESO Gateway and DCS gateway RTU's as per CIP requirements. 2.42 Days
Continuous		  
20-Aug-25 08:00 28-Aug-25 18:30 ALTALINK TE 420s Protection & Control (420s Broadmoor) protection outages during 420s731(252) breaker replacement 8.44 Days
Daily		  
20-Aug-25 08:00 01-Sep-25 17:00 ALTALINK IO 170L (632s Russell - 799s Coleman) placeholder for 170L 12.38 Days
Continuous		 AB-BC
20-Aug-25 08:00 20-Aug-25 17:00 ALTALINK TE AltaLink Telecom Equipment 9342R MPLS upgrade 9 Hours
Daily		  
20-Aug-25 08:00 22-Aug-25 18:00 SUNCOR TE 29EDD-34 RTU/SCADA (29EDD-34) RTU firmware upgrade and reboot 2.42 Days
Continuous		  
20-Aug-25 08:00 01-Sep-25 18:00 ALTALINK TE 799s Protection & Control (799s Coleman) disable 786L protections to prevent misoperation due to 799s34 PT outage 12.42 Days
Continuous		  
20-Aug-25 08:30 21-Aug-25 16:00 ATCO Outage 786s 703T (786s High Level), 786s 703 (786s High Level), 786s SVC (786s High Level) breaker testing 31.5 Hours
Continuous		  
20-Aug-25 09:00 26-Aug-25 20:00 SUNCOR Outage 29EDD-3 29PT-5 (29EDD-3), 29PL9-4 (29EDD-1 Millennium - 29EDD-3) Complete the PRC5 checks for 29PT-5, verify the function of the sudden pressure and lockout relay - 300506238
29PL9-4 Firmware Upgrade to 8.6 - 300506600		 6.46 Days
Continuous		  
20-Aug-25 09:00 20-Aug-25 17:00 ATCO TE ATCO Telecom Equipment, 765s RTU/SCADA (765s Mannix Mine) replace old SIM card with IoT SIM and re-configure checkpoint FW with NSG 8 Hours
Continuous		  
20-Aug-25 09:30 21-Aug-25 17:30 ATCO Outage 757s 607 (757s Battle River), 757s 607C (757s Battle River) breaker testing 1.33 Days
Continuous		  
20-Aug-25 09:30 21-Aug-25 17:30 ATCO Outage 813s 718 (813s Little Smoky) BREAKER SF6 GL312 COMPLETE TESTING - 718 @ 813S 1.33 Days
Continuous		  
20-Aug-25 09:30 21-Aug-25 17:00 ATCO Outage 917s 703 (917s Horse River), 917s 703C (917s Horse River) breaker testing 31.5 Hours
Continuous		  
20-Aug-25 13:00 20-Aug-25 15:00 ATCO TE ATCO Telecom Equipment, 2081s RTU/SCADA (2081s Meadow Creek), 856s RTU/SCADA (856s Kinosis) Kinosis_S-Telecom/Meadow Creek_S-Telecom- SAR OS UPGRADES TO V21 THEN V 22.10.R6. IMPACT TO THE FOLLOWING TRAFFIC FOR UP TO 1 HOUR: 9L85 A, 9L45 A, 856s KINOSIS RTU, 2081s MEADOW CREEK RTU
 2 Hours
Continuous		  
20-Aug-25 23:00 21-Aug-25 03:00 ALTALINK Outage 62s T1 (62s Brazeau Plant), 62s 1 (62s Brazeau Plant) maintenance 4 Hours
Continuous		  
21-Aug-25 03:01 21-Aug-25 07:00 ALTALINK Outage 62s T2 (62s Brazeau Plant), 62s 2 (62s Brazeau Plant) maintenance 3.98 Hours
Continuous		  
21-Aug-25 07:00 06-Sep-25 17:00 ALTALINK TE 35s Protection & Control (35s Rundle) protection outage of line TPR protection relays for module relocation 16.42 Days
Daily		  
21-Aug-25 07:00 06-Sep-25 17:00 ALTALINK TE 118s Protection & Control (118s Canmore) module relocation 16.42 Days
Daily		  
21-Aug-25 07:00 21-Aug-25 10:00 ALTALINK TE 35s Protection & Control (35s Rundle) settings changes 3 Hours
Daily		  
21-Aug-25 07:00 21-Aug-25 10:00 ALTALINK TE 118s Protection & Control (118s Canmore) settings change 3 Hours
Daily		  
21-Aug-25 07:30 22-Aug-25 16:30 ATCO, ALTALINK Outage ALC01L (408s Air Liquide Scotford - 409s Shell Scotford), 409s 107 (409s Shell Scotford) complete maintenance testing, function testing, cleaning, lubrication and inspection at 408s 1.38 Days
Continuous		  
21-Aug-25 08:00 21-Aug-25 16:00 ENMAX Outage 162B240-RB132 (SS-162) HV breaker maintenance - 162B240-RB132. dashpot checks 8 Hours
Continuous		  
21-Aug-25 08:00 22-Aug-25 16:00 ATCO IO ALC01L (408s Air Liquide Scotford - 409s Shell Scotford) Air Liquide- Complete maintenance testing, function testing, cleaning, lubrication and inspection at 408s 1.33 Days
Continuous		  
21-Aug-25 08:00 08-Sep-25 17:00 ALTALINK TE 35s RTU/SCADA (35s Rundle Plant) to cutover supervisory indication, control and metering 18.38 Days
Daily		  
21-Aug-25 08:00 22-Aug-25 18:00 ENMAX Outage 14.1TR (SS-14) tap changer inspection, reversing switch check 1.42 Days
Continuous		  
21-Aug-25 08:00 05-Sep-25 17:30 ATCO TE 815s Protection & Control (815s Goodfare) PRC-005 - microprocessor relay testing 51-81-79 @ 815S 15.4 Days
Continuous		  
21-Aug-25 08:00 21-Aug-25 15:00 ALTALINK Outage 514L (396s Pincher Creek - 514BL tap), 514L (513s Lundbreck - 514BL tap), 396s 514N (396s Pincher Creek) urgent outage to replace arms and insulation 7 Hours
Daily		  
21-Aug-25 09:00 21-Aug-25 11:00 ATCO TE ATCO Telecom Equipment, 2082s RTU/SCADA (2082s Dog Rib) Dog Rib_S-Telecom- Upgrading OS version to v.21 to 22.10.R6.
Impact to the following for up to 1 hour:
SUPEP119 - DOG RIB SUB SCADA
TPRCP209 / 7L71 A - DOG RIB / RUTH LAKE
TPRCP210 / 7L71 B - DOG RIB / RUTH LAKE
TPRCP211 / 7L71 A - DOG RIB / PARSONS CREEK
TPRCP212 / 7L71 B - DOG RIB / PARSONS CREEK		 2 Hours
Continuous		  
21-Aug-25 09:00 21-Aug-25 18:00 ALTALINK TE 35s RTU/SCADA (35s Rundle Plant), AltaLink Telecom Equipment A complete Telecom outage will be required including the below services - Altalink 35s SCADA - 54/85L "A" TPR to 118s - 54/85L "B" TPR to 118s - 35s OPSLAN/VOIP 9 Hours
Daily		  
21-Aug-25 09:00 22-Aug-25 17:00 ATCO Outage 951s SVC (951s Thickwood) repair sensor 1.33 Days
Continuous		  
21-Aug-25 09:00 21-Aug-25 17:00 ATCO TE ATCO Telecom Equipment, 874s RTU/SCADA (874s McKay River) LOW BES firewall install 8 Hours
Continuous		  
21-Aug-25 10:00 21-Aug-25 17:00 ATCO TE ATCO Telecom Equipment, 776s RTU/SCADA (776s Richdale) SIPA phase out project - replace old SIM card with Iot SIM and re-configure checkpoint FW with NSG
 7 Hours
Continuous		  
22-Aug-25 07:00 26-Aug-25 18:00 ENMAX, ALTALINK Outage 50L (44s Bearspaw Plant - SS-21) Replacing structures 116 & 117. 4.46 Days
Continuous		  
22-Aug-25 07:00 26-Aug-25 18:00 ENMAX, ALTALINK IO 50L (44s Bearspaw Plant - SS-21) Altalink outage. : Replacing structures 116 & 117 4.46 Days
Continuous		  
22-Aug-25 07:00 26-Aug-25 17:00 ENMAX, ALTALINK Outage 50L (44s Bearspaw Plant - SS-21) 21.1TR Replacement. Trip testing. 4.42 Days
Continuous		  
22-Aug-25 07:00 06-Sep-25 17:00 ALTALINK TE 35s Protection & Control (35s Rundle) alarm/metering testing at 35s 15.42 Days
Daily		  
22-Aug-25 07:00 06-Sep-25 17:00 ALTALINK TE 33s Protection & Control (33s Spray) alarm/metering testing at 35s 15.42 Days
Daily		  
22-Aug-25 08:00 24-Aug-25 16:00 ATCO, CNRL Outage 838s 75-BC-1911 (838s Horizon Mining) 260kV Breaker Tank Heater Replacement 2.33 Days
Continuous		  
22-Aug-25 08:00 22-Aug-25 17:00 ALTALINK IO 887L (48s Pocaterra - 978s BCH Britt Creek) FRO project work 9 Hours
Continuous		  
22-Aug-25 08:00 22-Aug-25 09:00 ALTALINK TE AltaLink Telecom Equipment change the quality of service of this for configuration alignment 60 Mins
Daily		  
22-Aug-25 08:00 22-Aug-25 16:00 ENMAX, ALTALINK Outage 21.80L (42s Sarcee - SS-21) HV Breaker Maintenance - 21B138-21.80. 8 Hours
Daily		  
22-Aug-25 08:00 26-Aug-25 17:00 ALTALINK RB 860L (44s Bearspaw Plant - 291s Cochrane) due to proximity to 50L outage 4.38 Days
Daily		  
22-Aug-25 08:30 22-Aug-25 17:00 ALTALINK, PR TE 306s Protection & Control (306s Halsbury) investigate why customer knife blade is pulled 8.5 Hours
Daily		  
22-Aug-25 09:00 22-Aug-25 17:00 ATCO TE ATCO Telecom Equipment, 759s RTU/SCADA (759s Castor) SIPA phase out project
- replace old SIM card with Iot SIM and re-configure checkpoint FW with NSG		 8 Hours
Continuous		  
22-Aug-25 09:30 22-Aug-25 17:30 ATCO RB 815s Goodfare tap up mobile substation to144kV bus 8 Hours
Continuous		  
22-Aug-25 15:00 22-Aug-25 17:00 ALTALINK Outage 887L (48s Pocaterra - 978s BCH Britt Creek) FRO project work. BCH to close their switch 1D23 de-energized 2 Hours
Continuous		 AB-BC
22-Aug-25 15:00 22-Aug-25 18:00 ALTALINK TE 35s Protection & Control (35s Rundle) settings changes 3 Hours
Daily		  
22-Aug-25 15:00 22-Aug-25 18:00 ALTALINK TE 118s Protection & Control (118s Canmore) settings change 3 Hours
Daily		  
22-Aug-25 16:00 22-Aug-25 17:00 BCH Outage 1L274 (48s Pocaterra - 978s BCH Britt Creek) switching activity for Bower tower bypass 60 Mins
Continuous		 AB-BC

Prepared On:   2025-08-13   16:25:30

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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