Alberta Electric System Operator
System Co-ordination Plan
2025-05-29 to 2025-06-06
Approved Outages

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From To Owner Type Element Scheduled Activity Date/Time Comments Interconnection
05-Oct-18 08:00 30-Jun-26 16:00 EPCOR IO C2 (Rossdale) forced outage 2,825.33 Days
Continuous		  
24-Oct-18 01:13 30-May-27 16:00 EPCOR IO C1 (Rossdale) forced outage 3,140.62 Days
Continuous		  
27-Nov-23 08:00 20-Jun-25 16:00 ENMAX Outage 32.2TR (SS-32) 32 sub 32.2TR 8 kV bus switchgear demolition 571.29 Days
Continuous		  
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 31-May-25 14:29 ALTALINK Outage 157s C1 (157s Lac La Biche) forced outage 281.03 Days
Continuous		  
23-Sep-24 10:00 29-May-25 12:00 ATCO TE 741s RTU/SCADA (741s Fox Creek) RTU configuration on new and old RTU's onsite 248.08 Days
Continuous		  
21-Oct-24 12:00 29-May-25 17:30 ATCO TE 741s Protection & Control (741s Fox Creek) block 144kv and 25 kv bus protection and breaker fail protection for the duration of 741s project 220.23 Days
Continuous		  
03-Jan-25 07:00 27-Jun-25 17:00 EPCOR TE 805s Protection & Control (805s Jasper), 805s RTU/SCADA (805s Jasper) protection blocking for P&C maintenance at Jasper 175.38 Days
Continuous		  
24-Jan-25 00:00 31-Dec-25 16:00 ALTALINK Outage 74s C3 (74s Janet) forced outage 341.67 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-Feb-25 10:00 23-Jun-25 16:00 ATCO TE 940s Protection & Control (940s Beartrap) relay testing 132.21 Days
Continuous		  
11-Mar-25 00:00 31-Dec-25 16:00 ALTALINK Outage 377s C1 (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 263s C1 (263s Strachan) forced outage 365.38 Days
Continuous		  
20-Mar-25 08:00 20-Mar-26 17:00 ALTALINK Outage 256s C1 (256s Harmattan) forced outage 365.38 Days
Continuous		  
28-Mar-25 17:31 02-Jun-25 16:00 ATCO TE APS# 203 7L128-963S Overload Mitigation DLR integration checks 65.94 Days
Continuous		  
31-Mar-25 07:00 07-Aug-25 17:00 EPCOR Outage 987s T1 (987s Clover Bar), 987s CCP7213 (987s Clover Bar), 987s CCP7214 (987s Clover Bar) Cloverbar - TX1 LCR 129.42 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 04-Jul-25 17:00 EPCOR TE Protection & Control (Woodcroft) Woodcroft: protection blocking for merging unit and protection upgrade. 95.42 Days
Continuous		  
12-May-25 08:00 29-Jun-25 16:00 ENMAX Outage 3.84L (SS-3 - SS-13), 3B138-3.84 (SS-3), 13B138-3.84 (SS-13) complete reconductoring of 3.84 line 48.33 Days
Continuous		  
12-May-25 09:00 17-Jun-25 20:00 SUNCOR TE 29EDD-94 Protection & Control (29EDD-94 Voyageur) block 7 relays CWP16 36.46 Days
Continuous		  
13-May-25 08:00 30-May-25 09:00 BCH Outage T3 (BCH Natal) disconnect T3 17.04 Days
Continuous		 AB-BC
14-May-25 04:01 14-Jul-25 07:30 ALTALINK Outage 799s T3 (799s Coleman) replace T3 61.15 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		  
20-May-25 07:00 30-May-25 17:00 EPCOR Outage T3 (Rossdale), R723 (Rossdale), R724 (Rossdale) Rossdale: TX3 zone LCR demo outage 10.42 Days
Continuous		  
20-May-25 09:00 30-May-25 17:00 BCH Outage T3 (BCH Natal), 2CB1 (BCH A. A. Lambert) reconfigure NTL T3 bus connection and cut over to new station equipment 10.33 Days
Continuous		 AB-BC
21-May-25 09:00 29-May-25 20:00 SUNCOR Outage 29EDD-1 T2 (29EDD-1 Millennium) OLTC maintenance and testing, 29EDD-1 T2 72LV arrester replacement 8.46 Days
Continuous		  
21-May-25 16:00 13-Jun-25 17:00 ATCO RB 7L20 (810s Dome Cutbank - 7L228 tap), 7L80 (740s H.R. Milner - 857s Kakwa Ridge), 7L80 (733s Simonette - 857s Kakwa Ridge) due to damaged structure on 7L20 23.04 Days
Continuous		  
23-May-25 14:00 02-Jun-25 10:00 ENMAX, ALTALINK Outage 1109L (SS-25 - SS-65), 25B240-D136 (SS-25), 25B240-D139 (SS-25), 25B240-D133 (SS-25), 25B240-D141 (SS-25), 25B240-D142 (SS-25), 25MD240-1109 (SS-25) cable testing, close cable open points on 1109L and salvage temp O/H 1109L. expanding zone to include 1109L C25s bus. Enmax grounding required, and Enmax to close 1109L risers removed from bus to potthead. soak test June 2nd 10:00 9.83 Days
Continuous		  
23-May-25 14:00 03-Jun-25 12:00 ENMAX, ALTALINK IO 240kV West Bus (SS-25), 1109L (SS-25 - SS-65) Altalink outage. Cable testing, close cable open points on 1109L and salvage Temp O/H 1109L. Expanding zone to include 1109L C25s Bus. Enmax grounding required, and Enmax to close 1109L risers removed from bus to potthead. Soak test June 2nd 10:00 10.92 Days
Continuous		  
25-May-25 07:00 01-Aug-25 17:00 EPCOR Outage 987s GT2 (987s Clover Bar), 987s CGB2 (987s Clover Bar) CPC request. 68.42 Days
Continuous		  
25-May-25 09:00 14-Jun-25 14:00 NOVACORP Outage 330s 330-PTR-04 (330s Nova Corp) replacement of transformer low voltage 13.8 kV bushings and low voltage 13.8 kV bus duct 20.21 Days
Continuous		  
26-May-25 07:00 06-Jun-25 17:00 EPCOR Outage 72JM18 (EP 805s Jasper - Meadowlark), 72JW19 (EP 805s Jasper - Woodcroft), 805s T1 (805s Jasper), 805s C1 (805s Jasper), EP 805s J2401 (EP 805s Jasper), EP 805s J2403 (EP 805s Jasper), EP 805s J2408 (EP 805s Jasper), EP 805s J724 (EP 805s Jasper), EP 805s J722 (EP 805s Jasper), M721 (Meadowlark), W721 (Woodcroft), EP 805s JAB1 (EP 805s Jasper), EP 805s JAB5 (EP 805s Jasper), EP 805s JAB2 (EP 805s Jasper) doble and disconnect maintenance and relay maintenance 11.42 Days
Continuous		  
26-May-25 07:00 07-Jun-25 17:00 ALTALINK, EPCOR IO 1056L (89s Ellerslie - 629s Argyll Transfer Station) pole refurbishment 12.42 Days
Continuous		  
26-May-25 07:00 29-May-25 17:30 ALTALINK Outage 122s T1 (122s Alberta Newsprint) T1 doble, maintenance, oil leaks. T1 CT repair 3.44 Days
Continuous		  
26-May-25 07:00 29-May-25 17:30 ALTALINK Outage 122s T2 (122s Alberta Newsprint) T2 doble, maintenance. T2 CT repair 3.44 Days
Continuous		  
26-May-25 07:00 01-Jun-25 19:00 ATCO RB 9L20 (755s Cordel - 766s Nevis) complete stringing activities on CETO project adjacent to 9L20 6.5 Days
Daily		  
26-May-25 07:30 30-May-25 17:30 ALTALINK RB 113L (20s Ghost - 33s Spray) component replacement str 114-193 4.42 Days
Daily		  
26-May-25 08:00 29-May-25 16:00 ATCO RB 7L08 (830s Carmon - 834s Wesley Creek) climbing inspection 3.33 Days
Continuous		  
26-May-25 08:00 15-Jun-25 16:00 ENMAX TE 37.81L (SS-37 - SS-38) 37.81L A and B protection outages - commissioning of the new relays Z31/Z32 bus diff, ASW and BMR-BT5 20.33 Days
Daily		  
26-May-25 08:00 15-Jun-25 16:00 ENMAX TE Protection & Control (SS-37) 37sub 138 kV bus differential Z31 protection outage - decommission the old protection and commission the new protection 20.33 Days
Continuous		  
26-May-25 08:00 15-Jun-25 16:00 ENMAX, ALTALINK TE 37.82L (74s Janet - SS-37) 37.82L A and B protection outages - commissioning of the new relays Z31/Z32 bus diff, ASW and BMR-BT5 20.33 Days
Daily		  
26-May-25 08:00 15-Jun-25 16:00 ENMAX TE Protection & Control (SS-37) 37sub 138 kV auto switching protection outage - decommission the old protection and commission the new protection 20.33 Days
Continuous		  
26-May-25 08:00 15-Jun-25 16:00 ENMAX TE Protection & Control (SS-37) 37sub BMR-82 outage - commissioning of the new relays (Z31/Z32 bus diff, ASW and BMR-BT5) 20.33 Days
Daily		  
26-May-25 08:00 15-Jun-25 16:00 ENMAX TE Protection & Control (SS-37) 37sub BMR-81 outage - commissioning of the new relays (Z31/Z32 bus diff, ASW and BMR-BT5) 20.33 Days
Daily		  
26-May-25 08:00 31-May-25 16:00 ENMAX, ALTALINK Outage 37.82L (74s Janet - SS-37), 37.2TR (SS-37), 74s 37.82W (74s Janet), 37B138-37.82 (SS-37) capacity upgrade. accommodate the commissioning of the new relays (Z31/Z32 bus diff, ASW and BMR-BT5) 5.33 Days
Continuous		  
26-May-25 08:00 15-Jun-25 16:00 ENMAX, ALTALINK TE 37.82L (74s Janet - SS-37) 37.82L A and B protection outages - commissioning of the new relays Z31/Z32 bus diff, ASW and BMR-BT5 20.33 Days
Daily		  
26-May-25 08:00 31-May-25 16:00 ENMAX, ALTALINK IO 37.82L (74s Janet - SS-37) capacity upgrade. accommodate the commissioning of the new relays Z31/Z32 bus diff, ASW and BMR-BT5 5.33 Days
Continuous		  
26-May-25 08:00 29-May-25 16:00 ENMAX Outage 33.2TR (SS-33) tap changer inspection 3.33 Days
Continuous		  
26-May-25 08:00 29-May-25 16:00 ENMAX Outage 5.10TR (SS-5) transformer power factor test, secondary cable test, transformer maintenance, relay fault pressure test 3.33 Days
Continuous		  
26-May-25 08:00 30-May-25 17:00 ALTALINK RB 3L (245s Seebe - 3AL tap), 3L (272s Springbank - 3AL tap), 3L (42s Sarcee - 272s Springbank) working in proximity of 3L during 113L component replacement 4.38 Days
Daily		  
26-May-25 08:00 30-May-25 17:30 ALTALINK TE 678s RTU/SCADA (678s Okotoks) download updated configuration, and complete points check 4.4 Days
Daily		  
26-May-25 08:00 30-May-25 17:30 ALTALINK TE 678s Protection & Control (678s Okotoks) changes relay settings 4.4 Days
Daily		  
26-May-25 08:00 29-May-25 16:00 ENMAX Outage 12.1TR (SS-12) transformer tests and maintenance, relay fault pressure test, reversing switch check, oil sampling MT, TC 3.33 Days
Continuous		  
26-May-25 09:00 08-Jun-25 17:30 ATCO Outage 2029s 1205 (2029s Heathfield), 2029s 1206 (2029s Heathfield), 2029s 1201 (2029s Heathfield), 2029s 1201A (2029s Heathfield), 2029s 1201B (2029s Heathfield), 2029s 1202 (2029s Heathfield), 2029s 1202A (2029s Heathfield), 2029s 1202B (2029s Heathfield), 2029s 1203 (2029s Heathfield), 2029s 1203A (2029s Heathfield), 2029s 1203B (2029s Heathfield), 2029s 1204 (2029s Heathfield), 2029s 1204A (2029s Heathfield), 2029s 1204B (2029s Heathfield), 2029s 1205A (2029s Heathfield), 2029s 1205B (2029s Heathfield), 2029s 1206A (2029s Heathfield), 2029s 1206B (2029s Heathfield), 2029s 1207 (2029s Heathfield), 2029s 1207A (2029s Heathfield), 2029s 1207B (2029s Heathfield), 2029s 1208 (2029s Heathfield), 2029s 1208A (2029s Heathfield), 2029s 1208B (2029s Heathfield), 2029s 1209 (2029s Heathfield), 2029s 1209A (2029s Heathfield), 2029s 1209B (2029s Heathfield), 2029s 1213A (2029s Heathfield), 2029s 1214 (2029s Heathfield), 2029s 1214A (2029s Heathfield), 2029s 1214B (2029s Heathfield), 2029s 1215 (2029s Heathfield), 2029s 1215A (2029s Heathfield), 2029s 1215B (2029s Heathfield), 2029s 1218A (2029s Heathfield), 2029s 1218 (2029s Heathfield), 2029s 1219 (2029s Heathfield), 2029s 1219A (2029s Heathfield), 2029s 1220 (2029s Heathfield), 2029s 1220A (2029s Heathfield), 2029s 1221 (2029s Heathfield), 2029s 1221A (2029s Heathfield), 2029s 1222 (2029s Heathfield), 2029s 1222A (2029s Heathfield), 2029s 1223 (2029s Heathfield), 2029s 1223A (2029s Heathfield), 2029s 1224 (2029s Heathfield), 2029s 1224A (2029s Heathfield), 2029s 1200SST1D1 (2029s Heathfield), 2029s 1200SST2D1 (2029s Heathfield), 2029s ACF1D1 (2029s Heathfield), 2029s ACF2D1 (2029s Heathfield) annual EATL outage at 2075s & 2029s 13.35 Days
Continuous		  
26-May-25 09:00 08-Jun-25 17:30 ATCO Outage 2075s 916 (2075s Newell), 2075s 917 (2075s Newell), 2075s 916B (2075s Newell), 2075s 917A (2075s Newell) annual EATL outage at 2075s & 2029s 13.35 Days
Continuous		  
26-May-25 09:00 08-Jun-25 17:30 ATCO Outage 13L50 (2029s Heathfield - 2075s Newell), 2029s T11 (2029s Heathfield), 2075s T11 (2075s Newell) annual EATL outage at 2075s & 2029s 13.35 Days
Continuous		  
26-May-25 09:00 29-May-25 18:00 ALTALINK Outage 799L (235s Entwistle - 443s South Mayerthorpe), 235s 799N (235s Entwistle) 799L rebuild (str 858-889) 3.38 Days
Continuous		  
26-May-25 10:00 29-May-25 16:00 ATCO TE 739s Protection & Control (739s Edith Lake), 739s RTU/SCADA (739s Edith Lake) update RTU with new building temp sensor scaling 3.25 Days
Continuous		  
26-May-25 10:00 05-Jun-25 17:00 ATCO TE 755s Protection & Control (755s Cordel) firmware upgrade 10.29 Days
Continuous		  
26-May-25 10:00 05-Jun-25 17:00 ATCO TE 755s Protection & Control (755s Cordel) firmware upgrade 10.29 Days
Continuous		  
26-May-25 10:00 05-Jun-25 17:00 ATCO TE 757s Protection & Control (757s Battle River) firmware upgrade 10.29 Days
Continuous		  
26-May-25 10:00 05-Jun-25 17:00 ATCO TE 757s Protection & Control (757s Battle River) firmware upgrade 10.29 Days
Continuous		  
26-May-25 10:00 11-Jun-25 17:00 ATCO TE 755s RTU/SCADA (755s Cordel) firmware upgrades to SEL-RTAC, station gateway (RTU), SEL I/O modules, ethernet switch 16.29 Days
Continuous		  
26-May-25 10:00 11-Jun-25 17:00 ATCO TE 755s Protection & Control (755s Cordel) firmware upgrade on RAS A & B / 9L16 relays 16.29 Days
Continuous		  
26-May-25 10:00 11-Jun-25 17:00 ATCO TE 755s Protection & Control (755s Cordel) firmware upgrade on RAS A & B / 9L20 relays 16.29 Days
Continuous		  
26-May-25 11:00 29-May-25 17:00 ATCO, ALTALINK RB 9L960 (13s Deerland - 825s Whitefish Lake) climbing inspection 3.25 Days
Continuous		  
26-May-25 11:00 29-May-25 17:00 ATCO, ALTALINK RB 9L961 (13s Deerland - 825s Whitefish Lake) climbing inspection 3.25 Days
Continuous		  
26-May-25 11:00 29-May-25 17:00 ATCO, ALTALINK RB 9L960 (13s Deerland - 825s Whitefish Lake) climbing inspection 3.25 Days
Continuous		  
26-May-25 11:00 29-May-25 17:00 ATCO, ALTALINK RB 9L961 (13s Deerland - 825s Whitefish Lake) climbing inspection 3.25 Days
Continuous		  
26-May-25 11:30 29-May-25 17:30 ALTALINK Outage 102s T4 (102s Langdon), 102s SVC (102s Langdon), 102s 252 (102s Langdon), 102s 552 (102s Langdon) PRC 005, doble and replace PD monitor 3.25 Days
Continuous		  
26-May-25 12:00 29-May-25 17:00 ATCO Outage 883s 701T (883s Gregoire), 883S 701TCS (883s Gregoire) 883s 701T major and tap changer refurbishment 3.21 Days
Continuous		  
26-May-25 12:30 30-May-25 17:00 ALTALINK Outage 83s T3 (83s Taber), 83s 64 (83s Taber) 83s T3 urgent leak repair 4.19 Days
Continuous		  
26-May-25 13:30 29-May-25 17:30 ALTALINK Outage 310p 452 (310p Sundance) replacement of 240 kV Koncar CTs associated with 310p452 3.17 Days
Continuous		  
27-May-25 07:00 30-May-25 17:00 ALTALINK, EPCOR RB 809L (320p Keephills - 510s Sunnybrook) washing program 3.42 Days
Continuous		  
27-May-25 07:00 30-May-25 17:00 ALTALINK, EPCOR RB 809L (320p Keephills - 510s Sunnybrook) washing program 3.42 Days
Daily		  
27-May-25 07:00 30-May-25 17:00 ENMAX, ALTALINK RB 1064L (74s Janet - 102s Langdon) salvaging 1109L temp OH near 1064L str 16, 17 3.42 Days
Daily		  
27-May-25 23:00 29-May-25 07:00 ALTALINK, TRANSALTA Outage 250p T1 (250p Bighorn Plant) maintenance 1.33 Days
Continuous		  
28-May-25 07:00 31-May-25 15:00 ALTALINK, TRANSALTA Outage 250p T2 (250p Bighorn Plant) maintenance 3.33 Days
Continuous		  
28-May-25 08:00 04-Jun-25 18:00 SUNCOR, ATCO Outage 635EDD-1000 144kV Bus 635PP-1001 (635EDD-1000), 635PL9-1001 (2005s Secord - 635EDD-1000), 635EDD-1000 635PT-1001 (635EDD-1000), 635EDD-1000 635-752-163 (635EDD-1000), 635EDD-1000 635-752-153 (635EDD-1000), 635EDD-1000 635-752-143 (635EDD-1000), 635EDD-1000 635-752-133 (635EDD-1000), 635EDD-1000 635-752-123 (635EDD-1000), 635EDD-1000 635-752-113 (635EDD-1000), 635EDD-1000 635-752-635PT-1001 (635EDD-1000), 635EDD-1000 635PS-9521 (635EDD-1000), 635EDD-1000 635PS-1003 (635EDD-1000), 2005s 1001D1 (2005s Secord) 635PP-1001 bus maintenance 7.42 Days
Continuous		  
28-May-25 08:00 02-Jun-25 18:00 SUNCOR Outage 29EDD-71 144kV Bus 29PP-47 (29EDD-71), 29EDD-71 752-4654 (29EDD-71), 29EDD-71 752-4644 (29EDD-71), 29EDD-71 752-4634 (29EDD-71), 29EDD-71 752-4624 (29EDD-71), 29EDD-71 752-4614 (29EDD-71) 29EDD71 29PP-47/29PT-576 system PM 5-year and PRC-005 testing 5.42 Days
Continuous		  
28-May-25 08:00 29-May-25 16:00 ENMAX Outage 16.61L (SS-16 - SS-27), 27B69-16.61 (SS-27), 16B69-16.61 (SS-16) breaker maintenance 27B69-16.61 1.33 Days
Continuous		  
29-May-25 07:00 30-May-25 17:00 ENMAX, ALTALINK RB 1080L (SS-25 - SS-65) Altalink outage - temp 1109L salvage near 1080L1 1.42 Days
Continuous		  
29-May-25 07:00 30-May-25 17:00 ENMAX, ALTALINK RB 1080L (SS-25 - SS-65) temp 1109L salvage near 1080L1 1.42 Days
Daily		  
29-May-25 07:00 29-May-25 18:00 ALTALINK Outage 777L (48s Pocaterra - 245s Seebe), 245s 777X (245s Seebe) urgent replace failing crossarm at 777L98, 58L/90L/76L RB 295028 due to proximity 11 Hours
Daily		 AB-BC
29-May-25 07:00 29-May-25 17:30 BHE Canada Outage 120s MATL PST (120s Picture Butte), 120s C1 (120s Picture Butte), 120s C2 (120s Picture Butte), 120s 1052 (120s Picture Butte), 120s 1152S (120s Picture Butte) oltc filter change, pt commissioning, motor starter replacement 10.5 Hours
Continuous		 AB-MATL
29-May-25 07:30 29-May-25 17:30 ALTALINK RB 58L (32s Barrier - 245s Seebe), 90L (32s Barrier - 115s Mount Allan) proximity to 777L 10 Hours
Daily		  
29-May-25 08:00 08-Jun-25 20:00 SUNCOR Outage 29PL6-3 (29EDD-1 Millennium - 30EDD-1), 30EDD-1 622T (30EDD-1), 30EDD-1 624T (30EDD-1), 30EDD-1 628 (30EDD-1), 30EDD-1 627 (30EDD-1), 30EDD-1 626 (30EDD-1), 30EDD-1 625 (30EDD-1), 30EDD-1 622TD (30EDD-1), 30EDD-1 624TD (30EDD-1) 29PP-116I,J,A, B, C 5 year preventive maintenance, ; 622T; 624T pm 10.5 Days
Continuous		  
29-May-25 08:00 29-May-25 17:30 ALTALINK Outage 186s T2 (186s Dry Creek) replace a failed tap changer transducer 9.5 Hours
Daily		  
29-May-25 08:00 29-May-25 17:00 ALTALINK TE 975s RTU/SCADA (975s Dalehurst) configuration update to fix RTU error 9 Hours
Daily		  
29-May-25 08:00 29-May-25 10:00 EPCOR Outage 524s T1 (524s Owens Corning) metering CT/PT inspection 2 Hours
Continuous		  
29-May-25 08:00 29-May-25 17:00 ALTALINK TE 525s RTU/SCADA (525s Carseland) urgent - supervisory/sisibility outage to troubleshoot RTU comm fail at 525s 9 Hours
Daily		  
29-May-25 08:00 29-May-25 17:00 ALTALINK TE 65s RTU/SCADA (65s High River) Emergency supervisory outage required to add alarm for new 25kV ABB RMAG breaker due to urgent replacement of 65s2213 9 Hours
Daily		  
29-May-25 10:00 29-May-25 17:30 ATCO TE 2091s RTU/SCADA (2091s Thornton) SCADA updates
 7.5 Hours
Continuous		  
30-May-25 08:30 31-May-25 17:00 ATCO TE 834s Protection & Control (834s Wesley Creek) urgent - replace failed relay - 21B/9L15 at 934s Wesley Creek 1.35 Days
Continuous		  
30-May-25 10:00 30-May-25 17:30 ATCO TE 798s RTU/SCADA (798s Bridge Creek) SCADA updates
 7.5 Hours
Continuous		  
30-May-25 17:00 11-Feb-26 17:00 EPCOR Outage T3 (Rossdale) Rossdale - TX3 LCR 257.04 Days
Continuous		  
31-May-25 07:00 07-Jun-25 17:00 ALTALINK, EPCOR Outage 1056L (89s Ellerslie - 629s Argyll Transfer Station) pole refurbishment 7.42 Days
Continuous		  
31-May-25 07:00 07-Jun-25 17:00 ALTALINK, EPCOR RB 1055L (629s Argyll Transfer Station - 816s Petrolia) pole refurbishment 7.42 Days
Continuous		  
31-May-25 07:30 10-Jun-25 17:30 ALTALINK Outage 276s 25 (276s Prentiss) urgent removal of Koncar CT unit #8 (A,B,C Phases) and existing live tank breaker 852 (276s25) and replace the combo set with a new 138kV dead-tank breaker 10.42 Days
Continuous		  
31-May-25 08:00 31-May-25 16:00 ENMAX Outage 14.2TR (SS-14) replace winding temperature gauge, oil sampling MT, TC, reversing switch check 8 Hours
Continuous		  
01-Jun-25 02:00 07-Jun-25 16:00 EPCOR Outage 987s CGB2 (987s Clover Bar), 987s GT2 (987s Clover Bar) metering upgrade 6.58 Days
Continuous		  
01-Jun-25 08:00 01-Jun-25 12:00 ENMAX Outage 9.83L (SS-9 - SS-43), 9B138-9.83 (SS-9), 43.1TR (SS-43), 43B138-9.83 (SS-43) summer substation washing, reversing switch check 4 Hours
Continuous		  
01-Jun-25 12:00 01-Jun-25 18:00 ENMAX Outage 33.84L (SS-33 - SS-43), 33B138-33.84 (SS-33), 43.2TR (SS-43), 43B138-33.84 (SS-43) summer substation washing, reversing switch check 6 Hours
Continuous		  
02-Jun-25 07:00 08-Jun-25 17:00 EPCOR Outage 816s P2401 (816s Petrolia), 816s P2402 (816s Petrolia), 816s T1 (816s Petrolia), 816s PAB1 (816s Petrolia) petrolia tx1 zone doble and disconnect maintenance 6.42 Days
Continuous		  
02-Jun-25 07:00 06-Jun-25 17:00 EPCOR RB 711L (113s Inland Cement - 747L tap) 711L reclose block, washing program 4.42 Days
Continuous		  
02-Jun-25 07:00 06-Jun-25 17:00 ALTALINK RB 747L (37s North Calder - 711L tap), 747L (99s North St. Albert - 711L tap) 711L / 747L reclose block for EPCOR serial washing program 4.42 Days
Daily		  
02-Jun-25 07:00 27-Jun-25 17:00 EPCOR Outage 557s T1 (557s Castle Downs) Castle Downs S/S Tx1 bay outage 25.42 Days
Continuous		  
02-Jun-25 07:00 06-Jun-25 17:00 EPCOR TE 72RV2 (EP 511s Victoria - Rossdale), 72RV4 (EP 511s Victoria - Rossdale), 72RV6 (EP 511s Victoria - Rossdale) protection firmware updates 4.42 Days
Continuous		  
02-Jun-25 07:00 08-Jun-25 19:00 ATCO RB 9L20 (755s Cordel - 766s Nevis) hold off on 9l20 to complete stringing activities on CETO project adjacent to 9L20 6.5 Days
Daily		  
02-Jun-25 07:00 10-Jun-25 17:00 ALTALINK TE 276s RTU/SCADA (276s Union Carbide Prentiss) Update the RTU/HMI config to split breaker alarms. Loss of ACC visibility for approx. 15 min. while updating the RTU/HMI configuration. 8.42 Days
Daily		  
02-Jun-25 07:30 06-Jun-25 16:30 ALTALINK Outage AML 511s 240kV ACF 1 Bus (511s Crossings), AML 511s T30 (AML 511s Crossings), AML 511s SVC Plus (AML 511s Crossings), AML 511s ACF11 (AML 511s Crossings), AML 511s ACF12 (AML 511s Crossings), AML 511s ACF13 (AML 511s Crossings), AML 511s 5352 (AML 511s Crossings), AML 511s 82 (AML 511s Crossings), AML 511s 81 (AML 511s Crossings), AML 511s 5252 (AML 511s Crossings), AML 511s 148 (AML 511s Crossings), AML 511s 152 (AML 511s Crossings), AML 511s 153 (AML 511s Crossings), AML 511s 154 (AML 511s Crossings), AML 511s 1152 (AML 511s Crossings) 511s1652 breaker maintenance and SVC+ inspections and maintenance 4.38 Days
Continuous		  
02-Jun-25 07:30 05-Jun-25 17:30 ALTALINK RB 113L (20s Ghost - 33s Spray) component replacement str 114-193. 3.42 Days
Daily		  
02-Jun-25 08:00 15-Jun-25 16:00 ENMAX Outage 37.81L (SS-37 - SS-38), 37.1TR (SS-37), 37MD138-37.1TR (SS-37), 37B138-37.81 (SS-37) 37sub Capacity Upgrade. Commission new relays (Z31/Z32 bus diff, ASW and BMR-BT5), remove the temporary 138kV bus and install risers to BT5. 37B138-37BT5, 37.3TR 138kV bus, new 37PT138-Z31, new 138kV switches in service on return. 13.33 Days
Continuous		  
02-Jun-25 08:00 07-Jun-25 08:00 ATCO, CNRL Outage 859s 701T (859s Primrose), 859s 701TD (859s Primrose), 859s 704 (859s Primrose), 859s 701 (859s Primrose) perform maintenance activities in 859S. 5 Days
Continuous		  
02-Jun-25 08:00 08-Jun-25 17:00 ATCO, CNRL TE 859s Protection & Control (859s Primrose), 859s RTU/SCADA (859s Primrose) perform maintenance activities in 859S. 6.38 Days
Continuous		  
02-Jun-25 08:00 05-Jun-25 16:00 ATCO RB 7L39 (722s Crystal Lake - 7LA39 tap), 7L39 (811s Clairmont Lake - 7LA39 tap) 7L39 climbing inspection 3.33 Days
Continuous		  
02-Jun-25 08:00 10-Jun-25 16:00 ENMAX Outage 21.61L (SS-21 - SS-34), 21B69-21.61 (SS-21) 21.61L line protection replacement 8.33 Days
Continuous		  
02-Jun-25 08:00 05-Jun-25 16:00 ENMAX Outage 38.2TR (SS-38) power factor test, secondary cable test, transformer maintenance, relay fault pressure test and oil sampling MT, TC 3.33 Days
Continuous		  
02-Jun-25 08:00 05-Jun-25 16:00 ENMAX Outage 9.83L (SS-9 - SS-43), 9B138-9.83 (SS-9), 43B138-9.83 (SS-43) HV Breaker Maintenance - 43B138-9.83, HV Breaker Maintenance - 9B138-9.83. Replace stand-off insulator 3.33 Days
Continuous		  
02-Jun-25 08:00 12-Jun-25 18:00 ALTALINK Outage 928L (17s Benalto - 42s Sarcee) 21 sub expansion - Iconic civil work, drilling ground wells in vicinity of the line. 10.42 Days
Continuous		  
02-Jun-25 08:00 05-Jun-25 16:00 ENMAX Outage 9.2TR (SS-9) power factor test, secondary cable test, transformer maintenance, relay fault pressure test and oil sampling MT, TC 3.33 Days
Continuous		  
02-Jun-25 08:00 07-Jun-25 17:30 ALTALINK TE 678s RTU/SCADA (678s Okotoks) Download updated configuration, and complete points check. Install and commission new port server. Loss of visibility of 678s for 15 minutes in the timeframe indicated. 5.4 Days
Daily		  
02-Jun-25 08:00 04-Jun-25 17:30 ALTALINK TE 678s Protection & Control (678s Okotoks) SCADA upgrade project requires various protection outages. Redundant protection in service. 2.4 Days
Daily		  
02-Jun-25 08:00 16-Jun-25 16:00 Syncrude Outage AL-1 (Aurora - D05), 260kV Bus 1 (D05), T1 (D05 Syncrude), D05 517 (D05), D05 517A (D05), D05 519 (D05), D05 519A (D05), D05 519B (D05), D05 511A (D05), D05 511 (D05), D05 71 (D05), D05 71A (D05), D05 510 (D05), D05 520 (D05) urgent 6 year zone PM 14.33 Days
Continuous		  
02-Jun-25 08:00 05-Jun-25 16:00 ATCO RB 7L51 (788s Hotchkiss - 927s Buchanan Creek), 7L51 (ATC 793s West Peace River - 927s Buchanan Creek) 7L51 Walk up and climbing inspection 3.33 Days
Continuous		  
02-Jun-25 08:00 03-Jun-25 16:00 ENMAX Outage 41.1TR (SS-41) tap changer inspection, reversing switch check, oil sampling and tap changer oil filtration maintenance 1.33 Days
Continuous		  
02-Jun-25 08:00 02-Jun-25 16:00 ENMAX TE Protection & Control (SS-32) 32PT138-Z31 outage. 32sub arc flash construction and cutover the PT circuits to the new building 8 Hours
Continuous		  
02-Jun-25 09:00 03-Jun-25 16:00 ATCO Outage 700s 705C (700s Bonnyville) breaker maintenance 31 Hours
Continuous		  
02-Jun-25 09:00 12-Jun-25 18:00 ALTALINK Outage 799L (235s Entwistle - 443s South Mayerthorpe), 443s 799N (443s South Mayerthorpe) 799L rebuild (str 858-889) 10.38 Days
Continuous		  
02-Jun-25 09:00 05-Jun-25 17:00 ATCO RB 7L92 (709s Vegreville - 7LA92 tap), 7L92 (777s Vilna - 7LA92 tap), 7L92 (777s Vilna - 819s Whitby Lake) climbing inspection on 7L92 3.33 Days
Daily		  
02-Jun-25 09:00 06-Jun-25 20:00 SUNCOR TE 29EDD-94 RTU/SCADA (29EDD-94 Voyageur), Suncor PMU fiber circuit testing at 29EDD-94 to investigate/fix the issues on PMU data 4.46 Days
Continuous		  
02-Jun-25 09:30 05-Jun-25 17:00 ALTALINK, EPCOR Outage 1057L (89s Ellerslie - 657s Summerside), 657s SU2402 (657s Summerside), 657s SU2401 (657s Summerside) Summerside: 1057L Zone Doble and SUDS1/SUDS3/SUDS9 Disconnect Maintenance 3.31 Days
Continuous		  
02-Jun-25 09:30 05-Jun-25 17:00 ALTALINK, EPCOR IO 1057L (89s Ellerslie - 657s Summerside), 89s 452 (89s Ellerslie), 89s 352 (89s Ellerslie) summerside, 1057L Zone doble and SUDS1/SUDS3/SUDS9 disconnect maintenance 3.31 Days
Continuous		  
02-Jun-25 09:30 03-Jun-25 17:30 ATCO Outage 7L48 (794s Valleyview - 7LA48 tap), 794s 703 (794s Valleyview) trip coil testing - breaker 703 @ 794s 1.33 Days
Continuous		  
02-Jun-25 09:30 03-Jun-25 16:00 ATCO TE 844s RTU/SCADA (844s AEC Mill) Dates Column Missing from Alarm Screen at 844S AEC Mill. Will lose visibility for RTU for 5-10 minutes during the update 30.5 Hours
Continuous		  
02-Jun-25 10:00 20-Jun-25 17:30 ATCO TE 813s Protection & Control (813s Little Smoky), 813s RTU/SCADA (813s Little Smoky) update DFR for AESO streaming

, replace 700PT disconnects
, wire 700PTY2 to DFR2
, replace 704PT disconnects
, wire 704PTY2 to DFR2
and install new satellite clock

- SCADA updates
 18.31 Days
Continuous		  
02-Jun-25 10:00 05-Jun-25 17:00 ATCO TE 755s Protection & Control (755s Cordel) firmware upgrade on 87L-21A/9L953.and end to end testing 3.29 Days
Continuous		  
02-Jun-25 10:00 03-Jun-25 12:00 ENMAX, ALTALINK Outage 1109L (SS-25 - SS-65) Soak 1109L for 24 hours. 1109L will remain energized from C65s to open switch 25MD240-1109. 26 Hours
Daily		  
02-Jun-25 10:00 02-Jun-25 17:00 ALTALINK TE 59s Protection & Control (59s Peigan) investigate/repair 956L prot comm trbl between 59s & 103s 956L A21/L7 7 Hours
Daily		  
02-Jun-25 10:00 02-Jun-25 17:00 ALTALINK TE 103s Protection & Control (103s Goose Lake) investigate/repair 956L prot comm trbl between 59s & 103s 956L A21/L8 7 Hours
Daily		  
02-Jun-25 10:30 02-Jun-25 14:30 ALTALINK Outage 514L (513s Lundbreck - 514BL tap) URGENT South Crew will be removing a nest from 514L452 4 Hours
Daily		  
02-Jun-25 12:00 04-Jun-25 17:00 ALTALINK TE 1012s Protection & Control (1012s Deer Hill) settings update on 685L A21/L1 & B21/L1 protections, redundant protection always in service 2.21 Days
Daily		  
02-Jun-25 12:00 02-Jun-25 16:00 ATCO TE 2082s RTU/SCADA (2082s Dog Rib), 2082s Protection & Control (2082s Dog Rib) UFLS settings updates - PRC006 on 5L736 relay,
RTU config updates will lose visibility for 5-10 minutes during updates		 4 Hours
Continuous		  
02-Jun-25 12:00 06-Jun-25 17:00 ATCO TE 716s Protection & Control (716s Lloydminster), 716s RTU/SCADA (716s Lloydminster) settings updates to 701T, new alarm points, RTU updates required,lose visibility for 5-10 minutes 4.21 Days
Continuous		  
02-Jun-25 13:00 02-Jun-25 16:00 ATCO Outage 2082s 701 (2082s Dog Rib) trip coil testing - breaker 701 @ 2082S 3 Hours
Continuous		  
02-Jun-25 13:00 05-Jun-25 17:00 ALTALINK TE 574s Protection & Control (574s Nilrem) update FW and end to end testing on the following relay A87/21/L4 3.17 Days
Daily		  
03-Jun-25 02:00 10-Jun-25 16:00 EPCOR Outage 987s GT3 (987s Clover Bar) metering upgrade 7.58 Days
Continuous		  
03-Jun-25 06:00 03-Jun-25 19:00 ALTALINK, BCH Outage 1L274 (BCH Natal - BCH Line Creek tap), T1 (BCH Natal), T2 (BCH Natal) NTL Station Upgrade Project. Extend 1L274 to new NTL section; isolate NTL T1 & T2 section
NTL T1, NTL T2 (permanent removal)
13 Hours
Continuous		 AB-BC
03-Jun-25 07:00 05-Jun-25 18:00 ALTALINK Outage 861L (71s Lamoureux - 258s Dow Hydrocarbons) maintenance and component replacements on various structures between 4-55 2.46 Days
Continuous		  
03-Jun-25 07:00 03-Jun-25 18:00 ALTALINK Outage 76L (33s Spray - 115s Mount Allan), 33s 76 (33s Spray) urgent - replacing failing crossarm at 76L75 11 Hours
Daily		  
03-Jun-25 07:30 05-Jun-25 16:30 ALTALINK, ENEL Outage 205s T2 (205s Castle Rock Ridge), 205s C1 (205s Castle Rock Ridge), 205s 52M2 (205s Castle Rock Ridge), 205s 89T2 (205s Castle Rock Ridge), 205s 89F11 (205s Castle Rock Ridge), 205s 89F12 (205s Castle Rock Ridge), 205s 89F13 (205s Castle Rock Ridge), 205s 89R11 (205s Castle Rock Ridge) facilitate 240 kV CTPT replacement, MPT leak repair, and annual maintenance checklist items 2.38 Days
Continuous		  
03-Jun-25 07:30 03-Jun-25 16:00 ENMAX TE Protection & Control (SS-21) 21sub 69 kV PT sec. fuses - 21.4TR directional over current protection, 21.61L line protection replacement 8.5 Hours
Continuous		  
03-Jun-25 07:30 03-Jun-25 16:00 ENMAX TE Protection & Control (SS-34) 34 sub 69 kV PT sec. fuses, 21.61l Line protection replacement 8.5 Hours
Continuous		  
03-Jun-25 07:30 05-Jun-25 16:00 ENMAX TE Protection & Control (SS-21) 21sub 69 kV bus differential protection outage - 21.61L line protection replacement 2.35 Days
Continuous		  
03-Jun-25 08:00 10-Jun-25 17:00 ALTALINK, BCH Outage 1L274 (BCH Natal - BCH Line Creek tap) NTL station rebuild stage 6.2 BC maintenance does not affect the Alberta ATC
7.38 Days
Continuous		 AB-BC
03-Jun-25 08:00 03-Jun-25 17:00 ALTALINK TE AltaLink Telecom Equipment flash card failure, replace on site, and software upgrade of radio hop 9 Hours
Daily		  
03-Jun-25 08:00 06-Jun-25 17:00 ALTALINK RB 757L (17s Benalto - 758L tap), 757L (297s Rimbey - 758L tap) replacing Arms and Insulation on 757L STRs 62-273 3.38 Days
Daily		  
03-Jun-25 08:00 03-Jun-25 17:00 ALTALINK TE 746s Protection & Control (746s Sherwood Park) update configuration to add back the 138 kV bus auto-restoration alarm 9 Hours
Daily		  
03-Jun-25 08:30 04-Jun-25 16:00 ATCO Outage 7L109 (791s Rainbow Lake - 930s Arcenciel), 791s 703 (791s Rainbow Lake), 930s 7L109D2 (930s Arcenciel) PRC-005 trip coil testing and SF6 HGF complete testing for breaker 703 at 791s 31.5 Hours
Continuous		  
03-Jun-25 09:00 03-Jun-25 17:00 ATCO Outage 7L71 (718s Parsons Creek - 2082s Dog Rib), 718s 702 (718s Parsons Creek) breaker min oil HLD partial testing -
PRC-005 - trip coil testing - breaker 702		 8 Hours
Continuous		  
03-Jun-25 09:00 10-Jun-25 17:00 ALTALINK, BCH Outage 1L274 (BCH Natal - BCH Line Creek tap) Replace end-of-life SPAR crossarms BC maintenance does not affect the Alberta ATC
7.33 Days
Continuous		 AB-BC
03-Jun-25 09:00 05-Jun-25 18:00 ALTALINK Outage 331s T2 (331s Ponoka) doble, maintenance, qualitrol repair, bird coverup, cooper cutout replacements (331s42, 331s43) 2.38 Days
Continuous		  
03-Jun-25 09:00 10-Jun-25 20:00 SUNCOR TE 29EDD-34 29PT-340 (29EDD-34), 29EDD-34 29PT-341 (29EDD-34) 29EDD-34 - 29PT-340 / 29PT-341 - Re-Calibrate SE-330 7.46 Days
Continuous		  
03-Jun-25 09:00 03-Jun-25 17:00 BCH Outage 5L72 (BCH Mica G.S. - BCH Nicola) Clearance required to replace broken and flashed insulators and install arcing horns 8 Hours
Continuous		 AB-BC
03-Jun-25 19:01 10-Jun-25 17:00 ALTALINK, BCH Outage 1L274 (BCH Natal - BCH Line Creek tap), 1CB1 (BCH Natal) NTL Station Upgrade Project. EVR owned 60L288 OOS to remove conductors above on 1L274, 1L274-old 6.92 Days
Continuous		 AB-BC
04-Jun-25 07:00 06-Jun-25 17:00 EPCOR Outage EP 511s Victoria T2 (EP 511s Victoria), EP 511s V722 (EP 511s Victoria), EP 511s V723 (EP 511s Victoria) Victoria: TX2 Zone, VAB2 Control Cable Relocate 2.42 Days
Continuous		  
04-Jun-25 07:30 04-Jun-25 16:00 ENMAX TE Protection & Control (SS-21) 21sub auto switching protection outage - 21.61L line protection replacement 8.5 Hours
Continuous		  
04-Jun-25 07:30 04-Jun-25 16:00 ENMAX TE Protection & Control (SS-34) 34sub 69kV Bus Differential Protection Outage. 21.61L Line Protection Replacement 8.5 Hours
Continuous		  
04-Jun-25 07:30 04-Jun-25 16:00 ENMAX TE Protection & Control (SS-34) 34sub Auto switching protection outage. 21.61L Line Protection Replacement 8.5 Hours
Continuous		  
04-Jun-25 08:00 04-Jun-25 18:00 Syncrude TE Syncrude ICCP Outage SCL - SCADA - Server Update
Whole Syncrude Visibility loss		 10 Hours
Daily		  
04-Jun-25 08:00 10-Jun-25 18:00 SUNCOR Outage 29EDD-71 29PS-232 (29EDD-71 Edd71Sub), 29EDD-71 29PS-234 (29EDD-71 Edd71Sub), 29EDD-71 752-4613 (29EDD-71), 29PL7-5 (29EDD-18 Firebag - 29EDD-71) FIREBAG 29EDD71;29-752-4613 10Y, PRC-5 TESTING, 29PS-232 REPAIR, 29PS-234 REPAIR 6.42 Days
Continuous		  
04-Jun-25 08:00 04-Jun-25 16:00 ATCO RB 7L32 (811s Clairmont Lake - 862s South Bezanson), 7L32 (813s Little Smoky - 862s South Bezanson) replace failed DLR senor on 7L32 between structures 409 & 410 using barehand techniques 8 Hours
Continuous		  
04-Jun-25 08:00 05-Jun-25 16:00 ENMAX Outage 16.1TR (SS-16) 16 sub 69 kV PT outage - tap changer inspection, reversing switch check, oil sampling MT, TC 1.33 Days
Continuous		  
04-Jun-25 08:00 05-Jun-25 15:00 ALTALINK TE 39s Protection & Control (39s Bickerdike) move and function test the reclose signals from the AltaLink A87/21/79_1135L, B87/21_1135L, A87/21/79_1168L, & B87/21/79_1168L 31 Hours
Daily		  
04-Jun-25 08:30 06-Jun-25 16:00 ATCO TE 933s Protection & Control (933s Tower Road) change relay settings on 7L165 for closing 700D2 at 718S. 2-94370 and 2-94372 2.31 Days
Continuous		  
04-Jun-25 08:30 06-Jun-25 16:00 ATCO TE 848s Protection & Control (848s Ruth Lake) change relay settings on 7L47 for closing 700D2 at 718S. 2-94370 and 2-94372 2.31 Days
Continuous		  
04-Jun-25 09:00 05-Jun-25 18:00 Saskpower Outage SASK POWER P2C maintenance 1.38 Days
Continuous		 AB-SK
04-Jun-25 09:00 04-Jun-25 17:00 ATCO Outage 718s 703 (718s Parsons Creek) trip coil testing- breaker 703 8 Hours
Continuous		  
04-Jun-25 09:00 04-Jun-25 17:00 ALTALINK, TRANSALTA Outage 245s 138kV North Bus (245s Seebe), 245s T1 (245s Seebe), 56L (20s Ghost - 245s Seebe), 87L (2s Kananaskis - 245s Seebe), 754L (245s Seebe - 742L tap) Urgent outage to repair hotspots on 245s53 & 245s44 prior to G7. 8 Hours
Daily		  
04-Jun-25 09:30 05-Jun-25 17:30 ATCO Outage 813s 706 (813s Little Smoky) trip coil testing 1.33 Days
Continuous		  
04-Jun-25 10:00 08-Jun-25 16:00 ATCO TE 791s RTU/SCADA (791s Rainbow Lake), 791s Protection & Control (791s Rainbow Lake) UFLS settings updates 4.25 Days
Continuous		  
04-Jun-25 11:00 04-Jun-25 17:00 ALTALINK TE 818s Protection & Control (818s Winefred) settings changes to eliminate nuisance alarming when cap banks are opened 6 Hours
Daily		  
05-Jun-25 08:00 10-Jun-25 18:00 SUNCOR Outage 635EDD-1000 144kV Bus 635PP-1000 (635EDD-1000), 635EDD-1000 635PT-1000 (635EDD-1000), 635EDD-1000 635PS-1002 (635EDD-1000), 635EDD-1000 635PS-1004 (635EDD-1000), 635EDD-1000 635PS-1010 (635EDD-1000), 635EDD-1000 635PS-1022 (635EDD-1000), 635EDD-1000 635PS-1026 (635EDD-1000), 635EDD-1000 635PS-1030 (635EDD-1000), 635EDD-1000 635PS-1016 (635EDD-1000), 635EDD-1000 635-752-635PT-1000 (635EDD-1000), 635EDD-1000 635PS-9520 (635EDD-1000), 635EDD-1000 635-752-111 (635EDD-1000), 635EDD-1000 635-752-121 (635EDD-1000), 635EDD-1000 635-752-131 (635EDD-1000), 635EDD-1000 635-752-142 (635EDD-1000), 635EDD-1000 635-752-152 (635EDD-1000), 635EDD-1000 635-752-161 (635EDD-1000) 635PP-1000 bus maintenance 5.42 Days
Continuous		  
05-Jun-25 08:00 05-Jun-25 16:00 ALTALINK Outage 864AL (346s Kaybob - 864L tap), 864BL (355s Chevron Knight - 864L tap), 864L (397s Benbow - 864AL tap), 864L (551s Chevron Kaybob - 864BL tap), 551s T1 (551s Chevron Kaybob), 346s T1 (346s Kaybob), 355s T1 (355s Chevron Knight), 355s T2 (355s Chevron Knight) Create Open Point 'A' on 864L. Create Open Point 'B' on 346s 4.16kV Bus. Create Open Point 'C' on 355s T2 4.16kV Bus. PCB oil samples from bushings of 551sT1,551sT2, SST1 and bus PTs. Investigate 551s864N operating issue. 8 Hours
Daily		  
05-Jun-25 08:00 06-Jun-25 10:30 ATCO TE 800s Protection & Control (800s Friedenstal) relay settings changes on 701T and 702T B, breaker fail firmware, settings, and testing 26.5 Hours
Continuous		  
05-Jun-25 08:30 06-Jun-25 16:00 ATCO Outage 791s 701 (791s Rainbow Lake), 7L122 (791s Rainbow Lake - 930s Arcenciel) PRC-005 - TRIP COIL TESTING - BREAKER 701 @ 791S
BREAKER SF6 HGF COMPLETE TESTING - BREAKER 701 @ 791S		 31.5 Hours
Continuous		  
05-Jun-25 09:00 05-Jun-25 12:00 ATCO Outage 718s 701 (718s Parsons Creek) PRC-005 - TRIP COIL TESTING - BREAKER 701 @ 718S
will close 700D2 to keep 7L47 and 7L165 energized 		3 Hours
Continuous		  
05-Jun-25 09:00 06-Jun-25 14:00 ENMAX Outage 31.84L (SS-31 - SS-32), 32B138-31.84 (SS-32), 31B138-31.84 (SS-31) Grounding improvements. Replace both existing overhead shield wire connections to A-frames. 29 Hours
Continuous		  
05-Jun-25 09:00 05-Jun-25 17:00 ATCO TE 925s RTU/SCADA (925s Green Stocking) RTU configuration updates 8 Hours
Continuous		  
05-Jun-25 10:00 05-Jun-25 12:00 ALTALINK TE AltaLink RTU/SCADA (AltaLink) RigSat needs to remotely upgrade our satellite equipment. 2 Hours
Daily		  
05-Jun-25 15:00 25-Nov-25 15:30 ALTALINK Outage 397s 864W (397s Benbow), 864L (397s Benbow - 864AL tap) New 864L line construction, New 397s48 (VT6) install 173.06 Days
Continuous		  
05-Jun-25 15:00 23-Jun-25 09:00 ALTALINK Outage 355s T1 (355s Chevron Knight), 355s T2 (355s Chevron Knight) Customer maintenance. Customer to salvage 4.16kV cable bus associated with T2 17.75 Days
Continuous		  
06-Jun-25 08:00 06-Jun-25 16:00 ALTALINK Outage 133L (234L tap - 522L tap), 866s T1 (866s Sundance Make-Up), 868s T1 (868s Keephills Make-Up), 866s 1 (866s Sundance Make-Up), 868s 1 (868s Keephills Make-Up) replace crossarm and insulators on structure 685A 8 Hours
Daily		  

Prepared On:   2025-05-28   16:45:30

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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