Alberta Electric System Operator
System Co-ordination Plan
2025-09-18 to 2025-09-26
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 30-Oct-25 17:30 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 262.69 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 24-Oct-25 17:00 EPCOR Outage 987s T1 (987s Clover Bar), 987s CCP7213 (987s Clover Bar), 987s CCP7214 (987s Clover Bar) Cloverbar - TX1 LCR 207.42 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		  
13-Jun-25 17:00 11-Feb-26 17:00 EPCOR Outage T3 (Rossdale) Rossdale - TX3 LCR 243.04 Days
Continuous		  
07-Jul-25 08:00 26-Sep-25 16:00 ENMAX Outage 21.1TR (SS-21) 21.1TR replacement 81.33 Days
Continuous		  
12-Jul-25 08:00 03-Oct-25 16:00 ENMAX Outage 14.1C (SS-14), 14.2C (SS-14) capacitor bank switcher replacement 83.33 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
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 30-Jan-26 17:00 EPCOR Outage T2 (EP Riverview) bushing test failure (found during OE110184) 189.04 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		  
02-Aug-25 23:30 03-Oct-25 18:00 ATCO Outage 827s SVC (827s Cranberry Lake) forced outage 61.77 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 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 15-Oct-25 17:00 ALTALINK Outage 931L (28s West Brooks - 132s Ware Junction), 28s 931N (28s West Brooks), 28s 5 (28s West Brooks), 28s 8 (28s West Brooks) Restoration from real time storm 56 Days
Continuous		  
20-Aug-25 17:00 15-Oct-25 17:00 ALTALINK Outage 1075L (28s West Brooks - 132s Ware Junction) restoration from real time storm 56 Days
Continuous		  
25-Aug-25 08:00 10-Oct-25 16:00 ENMAX Outage 32.1TR (SS-32) slip over CT and new power cables installation and P&C works 46.33 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		  
26-Aug-25 08:00 27-Sep-25 17:00 ALTALINK Outage 294s T1 (294s Brazeau Outlet Works), 294s 1 (294s Brazeau Outlet Works), 294s 2 (294s Brazeau Outlet Works), 294s 24 (294s Brazeau Outlet Works) replace T1 and associated protections 32.38 Days
Continuous		  
28-Aug-25 08:00 28-Sep-25 23:00 SUNCOR Outage 29PL9-24 (29EDD-94 Voyageur - 29EDD-60 Inglis Island), 29EDD-60 29PT-702 (29EDD-60 Inglis Island), 29EDD-60 30-252-400001 (29EDD-60 Inglis Island) 29pt-702 - repair / replace burned bonding conductor (9000807989) 31.63 Days
Continuous		  
01-Sep-25 08:00 25-Sep-25 16:00 ENMAX Outage 39.2TR (SS-39) secondary cable replacement 24.33 Days
Continuous		  
02-Sep-25 07:00 12-Oct-25 17:00 EPCOR Outage 557s T2 (557s Castle Downs) transformer bay outage 40.42 Days
Continuous		  
02-Sep-25 07:00 26-Sep-25 17:00 EPCOR Outage 805s T1 (805s Jasper) jasper: tx1 bushing replacement (pcb) 24.42 Days
Continuous		  
02-Sep-25 07:00 26-Sep-25 17:00 EPCOR Outage 72JW19 (EP 805s Jasper - Woodcroft), W721 (Woodcroft), EP 805s J724 (EP 805s Jasper), EP 805s JDS28 (EP 805s Jasper) jw19: ofpt degass maintenance (ugt) 24.42 Days
Continuous		  
02-Sep-25 08:00 26-Sep-25 16:00 ENMAX Outage 38.1C (SS-38) capacitor bank switcher replacement 24.33 Days
Continuous		  
04-Sep-25 07:00 22-Sep-25 19:30 ALTALINK RB 784AL (482s Haynes - 784L tap), 784L (332s Ellis - 784AL tap), 784L (535s Joffre - 784AL tap) stringing new CETO lines over top 18.52 Days
Daily		  
05-Sep-25 08:00 07-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. 63.38 Days
Continuous		  
05-Sep-25 08:00 07-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. 63.38 Days
Continuous		  
08-Sep-25 07:00 19-Sep-25 17:00 EPCOR RB 711L (113s Inland Cement - 747L tap) washing program 11.42 Days
Continuous		  
08-Sep-25 07:00 19-Sep-25 17:00 ALTALINK RB 747L (37s North Calder - 711L tap), 747L (99s North St. Albert - 711L tap) washing program 11.42 Days
Continuous		  
08-Sep-25 07:00 18-Sep-25 16:00 ENMAX TE Protection & Control (SS-14) 14PT138-Z31 secondary outage, relocate secondary wiring to new panel, 14.1TR transformer protection replacement 10.38 Days
Daily		  
08-Sep-25 07:00 18-Sep-25 16:00 ENMAX TE Protection & Control (SS-14) 14sub 138kV 87 bus diff Z31protection outage, 14.1TR transformer protection replacement 10.38 Days
Daily		  
08-Sep-25 09:00 18-Sep-25 17:00 BCH IO 5L92 (BCH Cranbrook - BCH Selkirk) replace insulators and spacers 10.33 Days
Continuous		 AB-BC
08-Sep-25 09:00 18-Sep-25 20:00 BCH Outage 5L92 (BCH Cranbrook - BCH Selkirk), T3 (BCH Cranbrook) insulator replacement project step 5 10.46 Days
Continuous		 AB-BC
08-Sep-25 10:00 19-Sep-25 17:30 ATCO TE 740s RTU/SCADA (740s H.R.Milner), 740s Protection & Control (740s H.R.Milner) RTU upgrades 11.31 Days
Continuous		  
08-Sep-25 14:00 03-Oct-25 17:30 ATCO TE 840s RTU/SCADA (840s McNeill Station) pull cables or prep prior to the outage, valve cooling system improvements, server replacement, valve hall camera install, fire system inspections 25.15 Days
Continuous		  
09-Sep-25 07:00 22-Sep-25 19:30 ALTALINK RB 775L (276s Prentiss - 535s Joffre) stringing overtop 775L str 94-95 with the new CETO 962L/986L spans 56-57 13.52 Days
Daily		  
09-Sep-25 07:00 22-Sep-25 19:30 ALTALINK RB 793L (87s Gaetz - 535s Joffre) stringing near 793L str 65-67 with the new CETO 962L/986L spans 56-57 13.52 Days
Daily		  
12-Sep-25 06:00 20-Sep-25 18:00 ALTALINK Outage 860L (44s Bearspaw Plant - 291s Cochrane), 291s 860 (291s Cochrane), 44s 860W (44s Bearspaw Plant) reroute str 51-58 8.5 Days
Continuous		  
12-Sep-25 07:00 23-Sep-25 08:00 ALTALINK Outage 185s T1 (185s Bretville) NGR maintenance, T1 meter replacement.,T1 doble 11.04 Days
Continuous		  
12-Sep-25 08:00 07-Oct-25 16:00 ENMAX Outage 33.1TR (SS-33) tap changer refurbishments. soak test required 25.33 Days
Continuous		  
12-Sep-25 13:00 26-Sep-25 17:00 BCH Outage T4 (BCH Natal) Natal substation replacement and ETM install 14.17 Days
Continuous		 AB-BC
14-Sep-25 00:00 29-Sep-25 16:00 Syncrude Outage G20 (Aurora), T3 (Aurora), 89-15 (Aurora) replace bushing and test transformer T3 in G02 substation 15.67 Days
Continuous		  
15-Sep-25 07:00 19-Sep-25 17:00 EPCOR Outage EP 511s Victoria T1 (EP 511s Victoria), EP 511s V721 (EP 511s Victoria), EP 511s V722 (EP 511s Victoria) Victoria - TX1 zone (V721 PT) LCR 4.42 Days
Continuous		  
15-Sep-25 07:00 18-Sep-25 17:00 ALTALINK TE 17s RTU/SCADA (17s Benalto) RTU configuration update 3.42 Days
Daily		  
15-Sep-25 07:00 18-Sep-25 17:00 ALTALINK TE 297s RTU/SCADA (297s Rimbey) RTU configuration update 3.42 Days
Daily		  
15-Sep-25 07:00 20-Sep-25 17:00 EPCOR Outage 987s T1 (987s Clover Bar), 987s T3 (987s Clover Bar), 987s CCP7214 (987s Clover Bar), 987s CCP7213 (987s Clover Bar), 987s C2401 (987s Clover Bar), 987s C2403 (987s Clover Bar), 987s C2402 (987s Clover Bar) cloverbar: TX1 and TX3 zone, Insulator stand install and CT removal 5.42 Days
Continuous		  
15-Sep-25 07:00 21-Sep-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
Continuous		  
15-Sep-25 07:30 18-Sep-25 18:30 ATCO, ALTALINK RB 530L (104s Watson Creek - 2085s Sheridan) climbing inspection 3.46 Days
Continuous		  
15-Sep-25 08:00 19-Sep-25 16:00 ALTALINK TE 297s Protection & Control (297s Rimbey) cutover and commission transfer trip to L9 feeder protection relay 4.33 Days
Daily		  
15-Sep-25 08:00 19-Sep-25 17:00 ALTALINK TE 297s Protection & Control (297s Rimbey) re-commission circuits 4.38 Days
Daily		  
15-Sep-25 08:00 26-Sep-25 17:00 ALTALINK TE 294s Protection & Control (294s Brazeau Outletworks) trip testing from new T2 protection 11.38 Days
Daily		  
15-Sep-25 08:00 18-Sep-25 18:00 ATCO, ALTALINK RB 6L530 (104s Watson Creek - 2085s Sheridan) climbing Inspection 3.42 Days
Continuous		  
15-Sep-25 08:00 18-Sep-25 16:00 ENMAX TE Protection & Control (SS-8) 8 sub 138kV secondary PT-E1 X and Y core. 8 sub panel upgrades for 1 sub transmission cut over 3.33 Days
Daily		  
15-Sep-25 08:00 18-Sep-25 16:00 ENMAX TE Protection & Control (SS-8) panel upgrades for 1 sub transmission cut over 3.33 Days
Daily		  
15-Sep-25 08:00 18-Sep-25 16:00 ENMAX TE Protection & Control (SS-8) 8 sub 138kV secondary PT-E5 X and Y core 3.33 Days
Daily		  
15-Sep-25 08:30 20-Sep-25 14:00 ALTALINK Outage 184s T2 (184s Petro-Canada Edmonton) T2 doble, maintenance, leaks and customer switchgear, bus duct, and NGR inspection 5.23 Days
Continuous		  
15-Sep-25 09:00 19-Sep-25 17:00 ATCO Outage 729s 703T (729s Otauwau), 729s 703 (729s Otauwau) 703T major and 503VR major/tap changer 4.33 Days
Continuous		  
15-Sep-25 09:00 26-Sep-25 12:00 ATCO Outage 7L06 (784s Donnelly - ATC 793s West Peace River), 784s 701T (784s Donnelly), ATC 793s 703 (ATC 793s West Peace River), 784s 701 (784s Donnelly), 784s 7L06D2 (784s Donnelly) replace failed 7L06D2 mod 11.13 Days
Continuous		  
15-Sep-25 09:00 18-Sep-25 18:00 ALTALINK Outage 799L (235s Entwistle - 443s South Mayerthorpe), 235s 799N (235s Entwistle) 799L rebuild (str 830-858) 3.38 Days
Continuous		  
15-Sep-25 09:00 18-Sep-25 16:00 ATCO RB 7L20 (810s Dome Cutbank - 7L228 tap), 7L20 (740s H.R. Milner - 810s Dome Cutbank) installing overhead guy wire to support H Frame structure 52 3.29 Days
Continuous		  
15-Sep-25 09:30 21-Sep-25 17:00 ALTALINK, EPCOR Outage 909L (310p Sundance - 665s Dome), 665s T2 (665s Dome), 665s D2403 (665s Dome), 665s D2402 (665s Dome) Dome - 909LW/TX2 doble and DDS4/DDS5/DAB2 disconnect maintenance and relay maintenance 6.31 Days
Continuous		  
15-Sep-25 09:30 21-Sep-25 17:00 ALTALINK, EPCOR Outage 909L (310p Sundance - 665s Dome), 310p 1352 (310p Sundance), 310p 1452 (310p Sundance) Dome - 909LE/TX2 doble and DDS4/DDS5/DAB2 disconnect maintenance and relay maintenance 6.31 Days
Continuous		  
15-Sep-25 09:30 18-Sep-25 12:30 ALTALINK Outage 33s 1 (33s Spray) replacement 3.13 Days
Continuous		  
15-Sep-25 10:00 03-Oct-25 17:30 ATCO Outage 840s McNeill Station converter inspection @ mcneill 840s breaker sf6 hpl complete testing 18.31 Days
Continuous		 AB-SK
15-Sep-25 10:30 02-Oct-25 12:00 ALTALINK, TRANSALTA Outage 33s T1 (33s Spray) testing 17.06 Days
Daily		  
15-Sep-25 13:00 18-Sep-25 15:00 ATCO RB 7L79 (771s Veteran - 932s Pemukan), 7L79 (771s Veteran - 892s Ribstone Creek) install frost mitigation inter-phase spacers (live line) 3.08 Days
Continuous		  
15-Sep-25 13:30 19-Sep-25 17:30 ALTALINK Outage 514L (513s Lundbreck - 514BL tap), 513s T1 (513s Lundbreck), 513s 1 (513s Lundbreck) 513s T1 PCB bushing replacement 4.17 Days
Continuous		  
15-Sep-25 14:01 29-Sep-25 14:00 ATCO Outage 7L30 (732s Mitsue - 844s AEC Mill), 732s 704 (732s Mitsue), 732s 707 (732s Mitsue), 844s 703 (844s AEC Mill), 732s 7L30D1 (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		  
15-Sep-25 15:00 18-Sep-25 15:00 ATCO Outage 7L53 (700s Bonnyville - 7LA53 tap), 700s 702 (700s Bonnyville) line to ground clearance mitigation for span 619-620, line to line clearance mitigation for span 702-703 3 Days
Continuous		  
15-Sep-25 18:00 18-Sep-25 17:00 ALTALINK, HSLP Outage 421s T2 (421s Hays), 421s 467E (421s Hays), 421s 89-L1 (421s Hays), 421s 52-1 (421s Hays), 421s 52-F01 (421s Hays), 421s 52-F02 (421s Hays) urgent replacement of 421s14 due to bird contact and switch contact cleaning of 421s18 due to maintenance identified hotspot 2.96 Days
Continuous		  
16-Sep-25 07:00 18-Sep-25 17:00 ALTALINK TE 17s Protection & Control (17s Benalto) B & A protections implement and test temporary settings as part of September 17 17s757N outage 2.42 Days
Daily		  
16-Sep-25 07:00 18-Sep-25 17:00 ALTALINK TE 580s Protection & Control (580s Sylvan Lake) 637L B & A protections implement and test temporary settings on 637L line protection relays as part of september 17 17s757N outage to meet 17s SLD note 7 requirements 2.42 Days
Daily		  
16-Sep-25 08:00 18-Sep-25 17:00 ALTALINK TE 368s Protection & Control (368s Burdett) PRC relay maintenance s879 96/752 oos less than 6 hours 2.38 Days
Daily		  
16-Sep-25 09:00 19-Sep-25 17:00 BCH Outage 5L72 (BCH Mica G.S. - BCH Nicola) F26 AOP NERC CN PM on NIC 5CB3, 5CB13 and 5B43. CPC to enter PN's OOS OAT
3.33 Days
Continuous		  
16-Sep-25 09:00 18-Sep-25 17:00 ALTALINK TE 368s RTU/SCADA (368s Burdett) cleaning up scada/cabling deficiencies 2.33 Days
Daily		  
16-Sep-25 10:30 18-Sep-25 17:30 ALTALINK Outage 478s T2 (478s Tucuman) transformer/LTC maint and sudden pressure relay repair 2.29 Days
Continuous		  
16-Sep-25 10:30 18-Sep-25 15:00 ATCO TE 710s Protection & Control (710s Vermilion) test existing 707C A & B relays as well as 707C Ion to new SCADA system 2.19 Days
Continuous		  
16-Sep-25 11:00 18-Sep-25 17:00 ALTALINK Outage 368s C1 (368s Burdett) cap bank protection PRC maintenance 2.25 Days
Continuous		  
17-Sep-25 07:30 18-Sep-25 18:30 TAYLORPP, ALTALINK Outage 148s T1 (148s Schantz), 148s T2 (148s Schantz), 148s T3 (148s Schantz), 256s 228X (256s Harmattan), 148s AG-EB25A (148s Schantz), 148s AG-EB510B (148s Schantz), 148s AG-EB510C (148s Schantz), 148s AG-EB510D (148s Schantz) LAN switch replacement 1.46 Days
Continuous		  
17-Sep-25 08:00 24-Sep-25 18:00 SUNCOR Outage 29PL7-4 (29EDD-65 - 29EDD-71), 29EDD-65 29PS-0284 (29EDD-65 Edd65Sub), 29EDD-71 29PS-243 (29EDD-71 Edd71Sub), 29EDD-65 29PT-0257 (29EDD-65), 29EDD-71 752-4624 (29EDD-71), 29EDD-71 752-4623 (29EDD-71), 29EDD-71 29PS-244 (29EDD-71 Edd71Sub), 29EDD-65 29PS-0279 (29EDD-65 Edd65Sub), 29EDD-65 29-952-4812 (29EDD-65), 29EDD-65 29-952-4813 (29EDD-65) maintenance, repairs and testing 7.42 Days
Continuous		  
17-Sep-25 08:00 18-Sep-25 18:00 ALTALINK TE AltaLink Telecom Equipment, 256s 228X (256s Harmattan) LAN switch replacement 1.42 Days
Continuous		  
17-Sep-25 11:30 18-Sep-25 12:30 ALTALINK Outage 142s C1 (142s Magcan) repair open fence on capacitor bank and replace stolen copper 25 Hours
Continuous		  
18-Sep-25 07:00 18-Sep-25 16:00 ENMAX TE Protection & Control (SS-14) 14.1TR A and B and 14.1TR transformer protection replacement 9 Hours
Continuous		  
18-Sep-25 07:00 18-Sep-25 17:00 ENMAX RB 14.83L (SS-14 - SS-36) fall transmission line washing 10 Hours
Continuous		  
18-Sep-25 07:00 18-Sep-25 17:00 ENMAX RB 39.82L (SS-39 - SS-162) fall transmission line washing 10 Hours
Continuous		  
18-Sep-25 07:00 18-Sep-25 17:00 ENMAX RB 38.83L (SS-38 - SS-39) fall transmission line washing 10 Hours
Continuous		  
18-Sep-25 08:00 18-Sep-25 16:00 ATCO TE 769s RTU/SCADA (769s Stettler), ATCO Telecom Equipment MDR8000 radio link major PM between Lonepine T and Stettler 8 Hours
Continuous		  
18-Sep-25 08:00 22-Sep-25 16:00 CNRL Outage 842s 75-1904 (842s Horizon Upgrading) breaker tank heater repair 4.33 Days
Continuous		  
18-Sep-25 08:00 18-Sep-25 17:00 ALTALINK TE 349s RTU/SCADA (349s Stavely) perform maintenance on 9269R 9 Hours
Daily		  
18-Sep-25 08:00 18-Sep-25 17:00 ALTALINK TE 245s Protection & Control (245s Seebe) on site settings changes 9 Hours
Daily		  
18-Sep-25 08:00 18-Sep-25 17:00 ALTALINK TE 291s Protection & Control (291s Cochrane) on site settings changes 9 Hours
Daily		  
18-Sep-25 08:00 18-Sep-25 17:00 ALTALINK, TRANSALTA TE 229s RTU/SCADA (229s Glenwood), 502s RTU/SCADA (502s Shell Waterton (#2)), AltaLink Telecom Equipment MPLS upgrade at 9232R 9 Hours
Daily		  
18-Sep-25 08:00 18-Sep-25 12:00 ENMAX Outage 11.82L (SS-11 - SS-14), 14B138-11.82 (SS-14) Sub 14 Capacitor Bank Switcher Replacement. Bus outage required for initial energization on new 14B138-14.CAP. GOI on 14CAP (25N1050) to be released prior to outage. 4 Hours
Continuous		  
18-Sep-25 09:00 18-Sep-25 17:30 ALTALINK Outage 62s T5 (62s Brazeau Plant), 62s 207 (62s Brazeau Plant) install bushing monitoring devices 8.5 Hours
Daily		  
18-Sep-25 09:00 19-Sep-25 16:00 ATCO TE 848s Protection & Control (848s Ruth Lake) investigate soft control/ DNP mapping and test with SOC/ HMI to confirm the expected bits are being sent to/ from the relay 31 Hours
Continuous		  
18-Sep-25 09:00 18-Sep-25 12:00 ENMAX TE 41.84L (SS-41 - SS-54) 41.84L A and B Line protection outage 3 Hours
Continuous		  
18-Sep-25 09:00 18-Sep-25 17:00 ALTALINK TE 325s Protection & Control (325s Leduc) standard relay maintenance 8 Hours
Daily		  
18-Sep-25 09:30 18-Sep-25 17:00 ALTALINK TE 62s RTU/SCADA (62s Brazeau Plant) RTU database update 7.5 Hours
Daily		  
18-Sep-25 12:00 18-Sep-25 16:00 ENMAX Outage 14.2TR (SS-14) trip testing and tranformer protection replacement 4 Hours
Continuous		  
18-Sep-25 12:00 18-Sep-25 16:00 ENMAX Trans Test 14.1C (SS-14), 14.2C (SS-14) testing cap bank switcher 4 Hours
Continuous		  
18-Sep-25 13:00 18-Sep-25 16:00 ENMAX TE 35.81L (42s Sarcee - SS-35) 35.81L A and B line protection outage 3 Hours
Continuous		  
18-Sep-25 17:00 19-Sep-25 18:00 ALTALINK Outage 421s T1 (421s Hays) closing open point 'A' on 25kV bus 1 25 Hours
Daily		  
19-Sep-25 07:00 28-Sep-25 17:00 ALTALINK Outage 1201L (520s Bennett - BCH Cranbrook) completing component replacement from 1201L21 – 1201L435 9.42 Days
Continuous		 AB-BC
19-Sep-25 07:00 28-Sep-25 17:00 ALTALINK Outage 786L (799s Coleman - BCH Natal), 799s 786W (799s Coleman) aligned with 1201L outage 9.42 Days
Continuous		 AB-BC
19-Sep-25 07:00 28-Sep-25 17:00 ALTALINK Outage 887L (48s Pocaterra - 978s BCH Britt Creek), 48s 887X (48s Pocaterra) aligned with 1201L outage 9.42 Days
Continuous		 AB-BC
19-Sep-25 07:00 28-Sep-25 17:00 BHE Canada Outage MATL (120s Picture Butte - Montana) align with 1201L outage 9.42 Days
Continuous		 AB-MATL
19-Sep-25 07:00 28-Sep-25 17:00 AESO Outage Path 1 (AIES Islanding) align with 1201L outage 9.42 Days
Continuous		 AB-BC
19-Sep-25 07:00 20-Sep-25 17:00 ENMAX, ALTALINK RB 1065L (74s Janet - 102s Langdon) fall transmission line washing 1.42 Days
Daily		  
19-Sep-25 07:00 20-Sep-25 17:00 ENMAX, ALTALINK RB 1064L (74s Janet - 102s Langdon) fall transmission line washing 1.42 Days
Daily		  
19-Sep-25 07:00 25-Sep-25 17:00 ALTALINK Outage 520s T1 (520s Bennett), 520s R7 (520s Bennett), 520s 552 (520s Bennett) south 520sT1 and R7 maintenance 6.42 Days
Continuous		 AB-BC
19-Sep-25 08:00 19-Sep-25 18:00 ENMAX Outage 11.81L (SS-11 - SS-13), 11.4TR (SS-11), 11.1TR (SS-11), 11B138-BT5 (SS-11), 11B138-11.81 (SS-11), 11MD138-11.1TR (SS-11), 11MD138-11.4TR (SS-11) substation insulator washing (fall), SW83 west phase hard to seat in jaw fixing, reversing switch check and oil sampling 10 Hours
Continuous		  
19-Sep-25 08:00 19-Sep-25 13:00 ALTALINK Outage 410s T1 (410s Josephburg) urgent extend 410sT1 CT wiring to DDR PRC002 compliance 5 Hours
Daily		  
19-Sep-25 09:00 08-Oct-25 17:00 ALTALINK TE 58s RTU/SCADA (58s Edson) update configuration for cap bank protection replacements 19.33 Days
Daily		  
19-Sep-25 09:30 08-Oct-25 18:00 ALTALINK Outage 58s C1 (58s Edson) replace 58s C1 and associated protections 19.35 Days
Continuous		  
19-Sep-25 13:01 19-Sep-25 18:00 ALTALINK Outage 410s T2 (410s Josephburg) urgent extend 410sT1 CT wiring to DDR PRC002 compliance 4.98 Hours
Continuous		  
20-Sep-25 08:00 24-Sep-25 17:00 ALTALINK RB 850L (525s Carseland - 678s Okotoks) crossing 850L106 - 107 removing spacers from 1201L31 – 32 proximity 4.38 Days
Daily		  
21-Sep-25 18:00 26-Sep-25 17:30 ALTALINK, BHE Canada Outage 120s 27 (120s Picture Butte) 120s MATL - full substation outage, maintenance on 240 kV breakers 4.98 Days
Continuous		 AB-MATL
22-Sep-25 07:00 22-Sep-25 17:00 EPCOR RB 746AL (524s Owens Corning - 746L tap) washing program 10 Hours
Continuous		  
22-Sep-25 07:00 22-Sep-25 17:00 ALTALINK RB 731L (38s East Edmonton - 746L tap), 731L (420s Broadmoor - 746L tap), 746L (731L tap - 746BL tap) washing program 10 Hours
Continuous		  
22-Sep-25 07:00 26-Sep-25 17:00 EPCOR Outage 72RG7 (Garneau - Rossdale), G722 (Garneau), G723 (Garneau), RG725 (Rossdale), GDS4 (Garneau) metering upgrade cutovers 4.42 Days
Continuous		  
22-Sep-25 07:00 28-Sep-25 19:00 ATCO RB 9L20 (755s Cordel - 766s Nevis) complete construction activities on CETO project adjacent to 9L20 6.5 Days
Continuous		  
22-Sep-25 07:00 26-Sep-25 10:00 EPCOR Outage 987s GT3 (987s Clover Bar) maintenance 4.13 Days
Continuous		  
22-Sep-25 07:00 26-Sep-25 17:00 EPCOR TE 814s Protection & Control (814s Bellamy) protection blocking for metering upgrade settings update 4.42 Days
Continuous		  
22-Sep-25 07:00 28-Sep-25 19:00 ATCO RB 7L143 (766s Nevis - 769s Stettler) facilitate work adjacent to line for CETO project 6.5 Days
Continuous		  
22-Sep-25 08:00 25-Sep-25 15:00 CMH Outage MH-30L (MHS-3 Southridge - MHS-5 NE Crescent Heights), MHS-5 MH69-502 (MHS-5 NE Crescent Heights), MHS-3 MH69-308 (MHS-3 Southridge) isolation of MH69-30/40L transmission line to facilitate maintenance 3.29 Days
Continuous		  
22-Sep-25 08:00 25-Sep-25 16:30 Lethbridge Outage 823L (146s MacDonald - 593s Lakeview), 146s 823L (146s Macdonald), 593s 823L (593s Lakeview) line outage on 823L to cutover SCADA points from SURVALENT scout to SEL RTAC 3.35 Days
Continuous		  
22-Sep-25 08:00 23-Sep-25 16:00 ATCO, CNRL, ALBIAN Outage 847s 902T (847s Muskeg River), 919s 908 (919s Hartley) remove potential for protection trips during function testing of new G60-A relay 1.33 Days
Continuous		  
22-Sep-25 08:00 26-Sep-25 17:30 ALTALINK TE 678s RTU/SCADA (678s Okotoks) major SCADA upgrade project - replacement of D20 RTU with new SG-4260 data concentrator, cutting over controls 4.4 Days
Daily		  
22-Sep-25 08:00 26-Sep-25 16:00 ENMAX, ALTALINK Outage 21.80L (42s Sarcee - SS-21), 20.82L (SS-20 - SS-21), 21.4TR (SS-21), 21.1TR (SS-21), 42s 21 (42s Sarcee), 21B138-20.82 (SS-21), 21B138-21.80 (SS-21), 21B69-21.4TR (SS-21), 21MD138-21.1TR (SS-21), 20B138-20.82 (SS-20), 21MD138-21.4TR (SS-21) 21.1TR replacement 4.33 Days
Continuous		  
22-Sep-25 08:00 23-Sep-25 17:30 ALTALINK TE 678s Protection & Control (678s Okotoks) major SCADA upgrade project 1.4 Days
Daily		  
22-Sep-25 08:00 24-Sep-25 16:00 ENMAX TE Protection & Control (SS-21) 21.2TR replacement and commissioning checks 2.33 Days
Continuous		  
22-Sep-25 08:00 24-Sep-25 16:00 ENMAX Outage 21.1C (SS-21) 21.2TR replacement 2.33 Days
Continuous		  
22-Sep-25 08:00 22-Sep-25 16:00 ENMAX TE Protection & Control (SS-32) wiring changes 8 Hours
Continuous		  
22-Sep-25 08:00 22-Sep-25 16:00 ENMAX TE RTU/SCADA (SS-14) SDN upgrade 8 Hours
Continuous		  
22-Sep-25 08:00 22-Sep-25 16:00 ENMAX, ALTALINK IO 21.80L (42s Sarcee - SS-21) 21.1TR replacement 8 Hours
Daily		  
22-Sep-25 08:30 29-Sep-25 14:00 ALTALINK Outage 184s T3 (184s Petro-Canada Edmonton) switchgear and NGR inspection 7.23 Days
Continuous		  
22-Sep-25 09:00 25-Sep-25 18:00 ALTALINK Outage 799L (235s Entwistle - 443s South Mayerthorpe), 235s 799N (235s Entwistle) 799L rebuild (Str 830-858) 3.38 Days
Continuous		  
22-Sep-25 09:00 22-Sep-25 17:00 ALTALINK TE AltaLink Telecom Equipment cutover to the new node 8 Hours
Daily		  
22-Sep-25 10:00 22-Sep-25 17:30 ATCO Outage 740s 700 (740s H.R. Milner) PRC-005 - TRIP COIL TESTING - BREAKER 700 @ 740S
TCM Program. RTXP Test Switch Mitigation and Replacement: 21A/700 @ 740S
TCM Program. RTXP Test Switch Mitigation and Replacement: 21B 700 @ 74		 7.5 Hours
Continuous		  
22-Sep-25 10:00 22-Sep-25 17:30 ATCO TE 740s Protection & Control (740s H.R.Milner) TCM program, RTXP test switch mitigation and replacement on 21A/700 at 740s
and 21B 700 at 740s
(aligned with 740s 700 outage)		 7.5 Hours
Continuous		  
22-Sep-25 10:00 25-Sep-25 17:00 ALTALINK TE 59s Protection & Control (59s Peigan) relay maintenance, investigate IED trouble alarm 3.29 Days
Daily		  
22-Sep-25 10:00 25-Sep-25 17:00 ALTALINK TE 332s Protection & Control (332s Ellis) PRC relay maintenance 3.29 Days
Daily		  
22-Sep-25 10:30 29-Sep-25 15:30 ATCO TE 710s Protection & Control (710s Vermilion) test 702 ETM, 703T ETM and battery alarms to the new SCADA system 7.21 Days
Continuous		  
22-Sep-25 12:00 22-Sep-25 14:00 ATCO RB 840s 901 (840s McNeill Station) work on a transformer 2 Hours
Continuous		  
22-Sep-25 12:30 25-Sep-25 16:30 ALTALINK Outage 310p T30 (310p Sundance), 310P 69 (310p Sundance) bushing replacement, maintenance and leak repair 3.17 Days
Continuous		  
22-Sep-25 12:30 25-Sep-25 17:30 ALTALINK TE 353s RTU/SCADA (353s Plamondon) configuration update for 2073L protection replacement 3.21 Days
Daily		  
22-Sep-25 12:30 25-Sep-25 17:00 ALTALINK TE 432s RTU/SCADA (432s Carvel) RTU database update 3.19 Days
Daily		  
22-Sep-25 13:00 25-Sep-25 17:00 ALTALINK, EPCOR Outage 1043L (320p Keephills - 367s Harry Smith), 320p 352 (320p Keephills), 320p 252 (320p Keephills), 320p 289 (320p Keephills) replace 320p289 3.17 Days
Continuous		  
22-Sep-25 13:00 25-Sep-25 16:00 ATCO Outage 7L28 (717s Ethel Lake - 846s Grand Centre) 7L28 Line to ground clearance mitigation 3.13 Days
Continuous		  
22-Sep-25 13:00 25-Sep-25 15:00 ATCO RB 7L79 (771s Veteran - 932s Pemukan), 7L79 (771s Veteran - 892s Ribstone Creek) install frost mitigation inter-phase spacers (live line) 3.08 Days
Continuous		  
22-Sep-25 13:00 23-Sep-25 17:00 ALTALINK IO AltaLink PMU PRC18 maintenance on the PMU PMU/L3 (aligned with 1201L outage) 28 Hours
Daily		  
22-Sep-25 13:00 23-Sep-25 17:00 ALTALINK TE 520s RTU/SCADA (520s Bennett) perform firmware updates on ruggedcom various devices (aligned with 1201L outage) 28 Hours
Daily		  
22-Sep-25 14:00 25-Sep-25 17:30 ALTALINK Outage 478s T1 (478s Tucuman) transformer or LTC maintenance and leak repair 3.15 Days
Continuous		  
22-Sep-25 22:59 23-Sep-25 06:00 ALTALINK Outage 723L (150s Clyde - 438s Westlock), 723L (438s Westlock - 724L tap), 438s T1 (438s Westlock), 438s 723E (438s Westlock), 438s 552 (438s Westlock), 438s 723W (438s Westlock) remove PCB ballast fixture on 438s 723L (L1) & 723L (150s) dead end steel structures 7.02 Hours
Daily		  
23-Sep-25 07:00 25-Sep-25 18:00 ALTALINK Outage 185s 138kV Bus 1 (185s Bretville), 185s T1 (185s Bretville), 185s 152 (185s Bretville), 185s 352 (185s Bretville), 185s 9 (185s Bretville) trip testing from customer protections to 185s152 and 185s352, T1 metering replacement, 185s152 maintenance 2.46 Days
Continuous		  
23-Sep-25 08:00 23-Sep-25 12:00 ENMAX Outage 2.80L (SS-2 - SS-23), 23.3TR (SS-23), 23B138-2.80 (SS-23), 23MD138-23.3TR (SS-23), SW83 (SS-23) fall substation insulator washing 4 Hours
Continuous		  
23-Sep-25 08:00 23-Sep-25 16:00 ENMAX Outage 40.81L (SS-40 - SS-41), 41B138-40.81 (SS-41), 40B138-40.81 (SS-40) shield wire corrosion testing 8 Hours
Continuous		  
23-Sep-25 08:00 23-Sep-25 13:00 SUNCOR IO 29EDD-1 Protection & Control (29EDD-1 Millennium) P&C building - BLAN network switch replacements 5 Hours
Continuous		  
23-Sep-25 08:00 10-Oct-25 17:00 ALTALINK TE 267s RTU/SCADA (267s Killarney Lake) RTU database update 17.38 Days
Daily		  
23-Sep-25 08:00 10-Oct-25 17:00 ALTALINK TE 267s Protection & Control (267s Killarney Lake) protection testing 17.38 Days
Daily		  
23-Sep-25 08:00 23-Sep-25 17:00 ALTALINK TE AltaLink Telecom Equipment cutover to the new node 9 Hours
Daily		  
23-Sep-25 08:00 13-Oct-25 16:00 ENMAX Outage 8B138-3A0 (SS-8), 8B138-4A0 (SS-8) 1 sub transmission line cut over, BMR installs for 3a0, 4a0 BF upgrade 20.33 Days
Continuous		  
23-Sep-25 08:00 24-Sep-25 09:06 BCH Outage 5CB22 (BCH Vaseux Lake) VAS 5CB22 CN PM/5RX1 PY/SYPN PM

25.1 Hours
Continuous		  
23-Sep-25 08:30 23-Sep-25 17:30 ALTALINK TE 184s RTU/SCADA (184s Petro-Canada Edmonton) update configuration for Hydran to Coresense replacement 9 Hours
Daily		  
23-Sep-25 09:00 24-Sep-25 17:30 ATCO Outage 740s 701 (740s H.R. Milner) PRC-005 - trip coil testing 1.35 Days
Continuous		  
23-Sep-25 09:00 23-Sep-25 17:00 ATCO TE ATCO Telecom Equipment, 764s RTU/SCADA (764s Heisler) Strome and Heisler telecom
Aprisa radio maintenance		 8 Hours
Continuous		  
23-Sep-25 09:30 24-Sep-25 12:00 ATCO Outage 780s 701 (780s Lubicon) breaker SF6 LTB145D1/B complete testing 26.5 Hours
Continuous		  
23-Sep-25 09:30 25-Sep-25 16:30 ALTALINK Outage 1071L (205s Castle Rock Ridge - 312s Fidler), 205s 352 (205s Castle Rock Ridge), 205s 452 (205s Castle Rock Ridge), 312s 1071 (312s Fidler) 205s352, 452, Koncar CT testing, repair 205s7 seized switch 2.29 Days
Daily		  
23-Sep-25 12:00 23-Sep-25 18:00 ENMAX Outage 23.80L (74s Janet - SS-23), 23.4TR (SS-23), 23B138-23.80 (SS-23), 23MD138-23.4TR (SS-23), SW84 (SS-23) fall substation insulator washing 6 Hours
Continuous		  
23-Sep-25 12:00 23-Sep-25 18:00 ALTALINK IO 74s 23.80W (74s Janet) substation - insulator washing (fall) 6 Hours
Continuous		  
23-Sep-25 12:30 02-Oct-25 10:00 ALTALINK Outage 267s T1 (267s Killarney Lake) install new line PT, 25kV a/b, connect 2055L neutral to new neutral JB 8.9 Days
Continuous		  
24-Sep-25 08:00 24-Sep-25 16:00 ENMAX Outage 9.80L (SS-9 - SS-31), 9.1TR (SS-9), 31B138-9.80 (SS-31), 9B138-9.80 (SS-9) fall substation insulator washing 8 Hours
Continuous		  
24-Sep-25 08:00 24-Sep-25 13:00 SUNCOR IO 29EDD-34 Protection & Control (29EDD-34) 29EDD-34 - 41RA-1630 P&C building 5 Hours
Continuous		  
24-Sep-25 08:00 25-Sep-25 17:00 ALTALINK TE 237s Protection & Control (237s Foothills) protection maintenance 1.38 Days
Daily		  
24-Sep-25 08:00 24-Sep-25 17:00 ALTALINK TE AltaLink Telecom Equipment outage to cutover to the new node 9 Hours
Daily		  
24-Sep-25 08:00 24-Sep-25 10:00 ENMAX TE Protection & Control (SS-38) 38PT138-Z31 secondary voltage outage - capacitor bank switcher replacement sub 38 2 Hours
Continuous		  
24-Sep-25 08:30 25-Sep-25 17:00 ALTALINK TE 320p RTU/SCADA (320P Keephills) update configuration for T6 A/B/C 1.35 Days
Daily		  
24-Sep-25 09:00 24-Sep-25 17:00 ATCO TE ATCO Telecom Equipment, 763s RTU/SCADA (763s Hanna)
Anderson and Hanna telecom - Aprisa radio maintenance
 8 Hours
Continuous		  
24-Sep-25 09:30 24-Sep-25 13:30 ATCO TE ATCO Telecom Equipment, 865s RTU/SCADA (865s Saddlehills) SaddleHills_S-Telecom- replace the SIM card in the firewall modem, program the firewall 4 Hours
Continuous		  
24-Sep-25 10:00 24-Sep-25 16:00 ALTALINK Outage 223L (150s Clyde - 159s Colinton), 150s 223N (150s Clyde), 159s 223 (159s Colinton) remove PCB ballast fixture on 159s42 structure 6 Hours
Daily		  
24-Sep-25 10:00 24-Sep-25 12:00 ENMAX TE Protection & Control (SS-38) 38 sub BMR 83 protection outage - capacitor bank switcher replacement sub 38 2 Hours
Continuous		  
24-Sep-25 12:30 25-Sep-25 17:00 ATCO Outage 780s 702 (780s Lubicon) breaker SF6 LTB145D1/B complete testing - breaker 702 @ 780S 28.5 Hours
Continuous		  
24-Sep-25 12:30 24-Sep-25 14:30 ENMAX TE Protection & Control (SS-38) 38 sub BMR 81 protection outage - capacitor bank switcher replacement sub 38 2 Hours
Continuous		  
24-Sep-25 14:30 24-Sep-25 16:30 ENMAX TE Protection & Control (SS-38) 38 sub autoswitching protection scheme outage - capacitor bank switcher replacement sub 38 2 Hours
Continuous		  
25-Sep-25 07:00 25-Sep-25 17:00 ALTALINK, EPCOR RB 909L (89s Ellerslie - 665s Dome) washing program 10 Hours
Continuous		  
25-Sep-25 07:00 25-Sep-25 17:00 ALTALINK, EPCOR RB 909L (89s Ellerslie - 665s Dome) washing program 10 Hours
Daily		  
25-Sep-25 07:00 25-Sep-25 17:00 EPCOR Outage RV726 (Rossdale), 72RV4 (EP 511s Victoria - Rossdale) Rossdale/RV4: RV726 breaker maintenance (SF6) 10 Hours
Continuous		  
25-Sep-25 08:00 25-Sep-25 12:00 ENMAX Outage 27.2TR (SS-27), 13.60L (SS-13 - SS-27) Substation - Insulator Washing (Fall) 4 Hours
Continuous		  
25-Sep-25 08:00 27-Sep-25 17:00 ATCO Outage 710s 702T (710s Vermilion) SCADA upgrade to station controller, cutover and commission 706/702T/502TD1 protection/status/control/alarms/analogs.
Load transfer to 703T via 500D2		 2.38 Days
Continuous		  
25-Sep-25 08:00 25-Sep-25 13:00 SUNCOR IO 29EDD-34 Protection & Control (29EDD-34) 29EDD-34 - 41RA-1780 - P&C Building - Duffney Substation - BLAN network switch replacements. During this time desk phones/swipe/security cameras will be offline but will station security personal during this time. There will be no SCADA visibility loss. 5 Hours
Continuous		  
25-Sep-25 08:00 25-Sep-25 10:00 ENMAX TE Protection & Control (SS-38) 38 sub 138 kV Z31 bus differential protection outage, capacitor bank switcher replacement sub 38 2 Hours
Continuous		  
25-Sep-25 08:00 28-Sep-25 17:00 ALTALINK RB 850L (525s Carseland - 678s Okotoks) crossing 850L106 - 107 removing spacers from 1201L31 – 32 proximity 3.38 Days
Daily		  
25-Sep-25 09:00 26-Sep-25 17:30 ATCO Outage 740s 705 (740s H.R. Milner) BREAKER SF6 HGF COMPLETE TESTING
PRC-005 - TRIP AND CLOSE COIL TESTING		 1.35 Days
Continuous		  
25-Sep-25 09:00 26-Sep-25 17:30 ATCO TE 740s Protection & Control (740s H.R.Milner) TCM program - RTXP test switch mitigation and replacement 21A/7L80 at 740s, 21B/7L80 at 740s
(aligned with 740s 705 outage)		 1.35 Days
Continuous		  
25-Sep-25 09:00 25-Sep-25 17:00 ATCO TE ATCO Telecom Equipment, 860s RTU/SCADA (860s Crow) crow telecom
SIPA phase out project
- replace old SIM card with IoT SIM and re-configure microhard modem with NSG		 8 Hours
Continuous		  
25-Sep-25 09:00 25-Sep-25 17:00 ATCO TE ATCO Telecom Equipment, 892s RTU/SCADA (892s Ribstone Creek) Fleet/Ribstone telecom - Aprisa radio maintenance 8 Hours
Continuous		  
25-Sep-25 09:00 25-Sep-25 17:00 ATCO TE ATCO Telecom Equipment, 888s RTU/SCADA (888s Dover) Dover telecom
LOW BES firewall install 		8 Hours
Continuous		  
25-Sep-25 09:30 25-Sep-25 17:30 ATCO TE ATCO Telecom Equipment, 862s RTU/SCADA (862s South Bezanson) replace the SIM card on the checkpoint and work with NSG to program the checkpoint firewall 8 Hours
Continuous		  
25-Sep-25 12:00 25-Sep-25 18:00 ENMAX Outage 16.61L (SS-16 - SS-27), 27.1TR (SS-27) Substation - Insulator Washing (Fall) 6 Hours
Continuous		  
25-Sep-25 12:30 25-Sep-25 14:00 ENMAX Outage 38.1TR (SS-38) capacitor bank switcher replacement Sub 38. commisioning and wiring changes 90 Mins
Continuous		  
25-Sep-25 14:00 25-Sep-25 15:30 ENMAX Outage 38.2TR (SS-38) capacitor bank switcher replacement Sub 38. commisioning and wiring changes 90 Mins
Continuous		  
25-Sep-25 15:30 25-Sep-25 17:00 ENMAX Outage 38.3TR (SS-38) capacitor bank switcher replacement Sub 38. commisioning and wiring changes 90 Mins
Continuous		  
25-Sep-25 17:21 27-Sep-25 17:21 ATCO TE 710s Protection & Control (710s Vermilion) wiring changes for 702T protection 2 Days
Continuous		  
26-Sep-25 07:00 26-Sep-25 17:00 ALTALINK, EPCOR RB 909L (310p Sundance - 665s Dome) washing program 10 Hours
Continuous		  
26-Sep-25 07:00 26-Sep-25 17:00 ALTALINK, EPCOR RB 909L (310p Sundance - 665s Dome) washing program 10 Hours
Daily		  
26-Sep-25 07:00 26-Sep-25 13:00 ALTALINK Outage 728L (353s Plamondon - 405s Waupisoo), 405s 728 (405s Waupisoo), 353s 452 (353s Plamondon) remove PCB ballast fixture on 353s23 structure 6 Hours
Daily		  
26-Sep-25 07:00 26-Sep-25 17:00 EPCOR Outage 72RV6 (EP 511s Victoria - Rossdale), EP 511s V723 (EP 511s Victoria), EP 511s V724 (EP 511s Victoria), RV722 (Rossdale), EP 511s VDS9 (EP 511s Victoria) victoria/rv6: vds9 ground switch repair 10 Hours
Continuous		  
26-Sep-25 07:00 23-Nov-25 11:00 ALTALINK Outage 397s 864W (397s Benbow), 864L (397s Benbow - 864AL tap) 864CL line construction, tie in 864CL to 397s17 by closing 864CL open point 'AA', tie in 864CL to 1117s 23-DS1 by closing 864CL open point 'CC', install new 397s48 (VT6) 58.21 Days
Continuous		  
26-Sep-25 08:00 26-Sep-25 10:00 ENMAX Outage 38.83L (SS-38 - SS-39), 38B138-38.83 (SS-38) capacitor bank switcher replacement sub 38, commisioning and wiring changes 2 Hours
Continuous		  
26-Sep-25 08:30 26-Sep-25 16:30 ATCO TE 890s RTU/SCADA (890s Melito), ATCO Telecom Equipment Melito_S -Telecom- replace the SIM card on the checkpoint and work with NSG to program the checkpoint firewall 8 Hours
Continuous		  
26-Sep-25 10:00 26-Sep-25 12:00 ENMAX Outage 37.81L (SS-37 - SS-38), 38.2TR (SS-38), 38.3TR (SS-38), 38B138-37.81 (SS-38), SW83 (SS-38) capacitor bank switcher replacement sub 38, commisioning and wiring change 2 Hours
Continuous		  
26-Sep-25 12:00 26-Sep-25 16:00 ATCO Outage 7L06 (784s Donnelly - 787s High Prairie), 787s 705 (787s High Prairie) remove mobile substation from 784s 4 Hours
Continuous		  
26-Sep-25 12:00 26-Sep-25 14:00 ATCO RB 840s 901 (840s McNeill Station) transformer work 2 Hours
Continuous		  
26-Sep-25 12:01 26-Sep-25 16:00 ENMAX Outage 38.1C (SS-38) capacitor bank switcher replacement sub 38, ten open close operations required to commission 3.98 Hours
Continuous		  
26-Sep-25 13:00 26-Sep-25 16:00 ALTALINK, TRANSALTA Outage 33s T2 (33s Spray) testing 3 Hours
Daily		  
26-Sep-25 13:01 26-Sep-25 18:00 ALTALINK Outage 728L (157s Lac La Biche - 353s Plamondon), 353s 552 (353s Plamondon), 157s 728W (157s Lac La Biche) remove PCB ballast fixture on 353s27 structure 4.98 Hours
Continuous		  

Prepared On:   2025-09-17   16:45:51

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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