Alberta Electric System Operator
System Co-ordination Plan
2025-06-05 to 2025-06-13
Approved Outages

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From To Owner Type Element Scheduled Activity Date/Time Comments Interconnection
05-Oct-18 08:00 30-Aug-25 16:00 EPCOR IO C2 (Rossdale) forced outage 2,521.33 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 01-Aug-25 16:00 ENMAX Outage 32.2TR (SS-32) 32 sub 32.2TR 8 kV bus switchgear demolition 613.29 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 30-Jun-26 14:29 ALTALINK Outage 157s C1 (157s Lac La Biche) forced outage 676.03 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		  
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		  
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 13-Jun-25 17:00 EPCOR Outage T3 (Rossdale), R723 (Rossdale), R724 (Rossdale) Rossdale: TX3 zone LCR demo outage 24.42 Days
Continuous		  
21-May-25 16:00 08-Jul-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 48.04 Days
Continuous		  
25-May-25 07:00 01-Aug-25 17:00 EPCOR Outage 987s GT2 (987s Clover Bar), 987s CGB2 (987s Clover Bar) maintenance 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		  
25-May-25 14:25 06-Jun-25 18:00 ATCO Outage 6L97 (735s Swan River - 739s Edith Lake) forced outage due to wildfire 12.15 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 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 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 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 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		  
27-May-25 17:06 06-Jun-25 18:00 ATCO Outage 6L96 (735s Swan River - 743s Sarah Lake) forced outage due to wildfire 10.04 Days
Continuous		  
29-May-25 07:23 06-Jun-25 18:00 ALTALINK Outage 1116L (167s Ipiatik Lake - 170s Pike) forced outage due to wildfire 8.44 Days
Continuous		  
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 17:31 30-Jun-25 00:00 BHE Canada Outage 120s C1 (120s Picture Butte) forced outage 31.27 Days
Continuous		 AB-MATL
29-May-25 19:52 06-Jun-25 18:00 ALTALINK Outage 971L (154s Black Spruce - 762s Conklin) forced outage due to wildfire 7.92 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 07:00 07-Jun-25 17:00 ALTALINK, EPCOR IO 1056L (89s Ellerslie - 629s Argyll Transfer Station) 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		  
01-Jun-25 14:44 30-Jun-25 17:00 ATCO Outage 7L94 (827s Cranberry Lake - 878s Kidney Lake) forced outage due to wildfire 29.09 Days
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) 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 276s 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) breaker maintenance 43B138-9.83, 9B138-9.83 and 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 06-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 4.33 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 5.4 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 519 (D05), 213 (Aurora), 211 (Aurora), D05 511 (D05), D05 71 (D05), D05 71A (D05), D05 511A (D05), D05 519A (D05), D05 510 (D05), D05 520 (D05), D05 517A (D05), 89-215 (Aurora), D05 519B (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) walk up and climbing inspection 3.33 Days
Continuous		  
02-Jun-25 09:00 12-Jun-25 18:00 ALTALINK Outage 799L (235s Entwistle - 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 12-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 10.46 Days
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 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 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 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 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 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 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) re-calibrate SE-330 for 29EDD-34 29PT-340 and 29PT-341 7.46 Days
Continuous		  
03-Jun-25 14:58 14-Jun-25 00:00 ATCO Outage 888s 919C (888s Dover) forced outage due to ravens nest 10.38 Days
Continuous		  
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 and 1L274-old 6.92 Days
Continuous		 AB-BC
04-Jun-25 07:00 11-Jun-25 16:00 EPCOR Outage 987s GT3 (987s Clover Bar) metering upgrade 7.38 Days
Continuous		  
04-Jun-25 08:00 10-Jun-25 18:00 SUNCOR Outage 29PL7-5 (29EDD-18 Firebag - 29EDD-71), 29EDD-71 752-4613 (29EDD-71), 29EDD-71 752-4614 (29EDD-71) PRC-5 testing 6.42 Days
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 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 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 09:30 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		  
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 points and PCB oil samples from bushings 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, SF6 HGF complete testing 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) 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) maintenance, salvage 4.16kV cable bus associated with T2 17.75 Days
Continuous		  
07-Jun-25 07:00 08-Jun-25 17:30 ALTALINK Outage 223L (150s Clyde - 159s Colinton), 150s 223N (150s Clyde), 159s 223 (159s Colinton) replacing cross arms and insulators on structures 177, 301 & 333 1.44 Days
Continuous		  
07-Jun-25 08:00 10-Jun-25 20:00 SUNCOR Outage 29PL9-3 (29EDD-1 Millennium - 29EDD-3), 29EDD-1 29EDD1s552 (29EDD-1 Millennium), 29EDD-1 29EDD1s652 (29EDD-1 Millennium), 29EDD-1 29EDD1SPL9-3 (29EDD-1 Millennium) PRC-005 check 3.5 Days
Continuous		  
07-Jun-25 08:00 10-Jun-25 14:00 ENMAX Outage 9.2TR (SS-9) grounding improvements, install new surge arrestor insulator supports, and grounding, tap changer inspection - 9.2-TC 3.25 Days
Continuous		  
07-Jun-25 08:30 08-Jun-25 16:00 ATCO TE 791s Protection & Control (791s Rainbow Lake) PRC-005 - relay testing - 50BF/701, 87L-21A/7L122 at 791s 31.5 Hours
Continuous		  
08-Jun-25 08:00 08-Jun-25 18:00 ENMAX Outage 20.82L (SS-20 - SS-21), 20.3TR (SS-20), 21B138-20.82 (SS-21), SW84 (SS-20), 20MD138-20.3TR (SS-20) spring substation washing, check reversing switch 10 Hours
Continuous		  
08-Jun-25 09:00 10-Jun-25 09:00 ENMAX Outage 9.80L (SS-9 - SS-31), 9B138-9.80 (SS-9), 31B138-9.80 (SS-31) grounding improvements, replace both existing overhead shield wire connections to A-frames 2 Days
Continuous		  
08-Jun-25 20:01 19-Jun-25 20:00 SUNCOR Outage 29PL6-2 (30EDD-1 - 29EDD-55), 30EDD-1 622T (30EDD-1), 30EDD-1 626 (30EDD-1), 30EDD-1 625 (30EDD-1), 30EDD-1 624 (30EDD-1), 30EDD-1 622TD (30EDD-1), 30EDD-1 29PL6-2CS (30EDD-1) 5 year preventive maintenance 11 Days
Continuous		  
09-Jun-25 07:00 20-Jun-25 17:00 EPCOR Outage 657s T2 (657s Summerside) Summerside - TX2 DGA LCR 11.42 Days
Continuous		  
09-Jun-25 07:00 13-Jun-25 17:00 EPCOR Outage RG7210 (Rossdale), 72RG1 (Garneau - Rossdale), GDS18 (Garneau) Rossdale/RG1: RG7210 breaker fail upgrade cut overs 4.42 Days
Continuous		  
09-Jun-25 07:00 27-Jun-25 17:00 EPCOR Outage 52s E2401 (52s East Industrial), 52s T1 (52s East Industrial) East Industrial: transformer T1 protection upgrade cutovers 18.42 Days
Continuous		  
09-Jun-25 07:00 20-Jun-25 17:00 EPCOR Outage T3 (Woodcroft), W724 (Woodcroft), W722 (Woodcroft) Woodcroft: Transformer T3 zone, protection upgrade cutovers 11.42 Days
Continuous		  
09-Jun-25 07:00 10-Jun-25 18:00 ATCO, CNRL Outage 859s 702 (859s Primrose) isolate and test breaker 702 in 859s 1.46 Days
Continuous		  
09-Jun-25 07:00 15-Jun-25 17:00 EPCOR Outage H726 (EP Hardisty), EP 803s L721 (EP 803s Lambton), S724 (Strathcona), S723 (Strathcona), T3 (Strathcona), 72LH8 (EP 803s Lambton - EP Hardisty), 72LS24 (EP 803s Lambton - Strathcona), SDS10 (Strathcona), SAB3 (Strathcona) Lambton/Strathcona/Hardisty: LH8 zone doble and relay maintenance, LS24 zone doble, strathcona TX3 doble, LDS13/SDS10/SDS8/SDS9/SAB3/HDS13 disconnect maintenance 6.42 Days
Continuous		  
09-Jun-25 07:00 15-Jun-25 19:00 ATCO RB 9L20 (755s Cordel - 766s Nevis) complete stringing activities on CETO project adjacent to 9L20 6.5 Days
Daily		  
09-Jun-25 07:00 01-Aug-25 17:00 EPCOR TE 330p Protection & Control (330p Genesee) 138/500 kV protection blocking for relay maintenance 53.42 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		  
09-Jun-25 07:30 13-Jun-25 17:30 ALTALINK RB 514L (396s Pincher Creek - 514BL tap), 514L (513s Lundbreck - 514BL tap) component replacement on 514L (str 16-186)& (str 452-453) - live line work 4.42 Days
Daily		  
09-Jun-25 08:00 23-Jun-25 17:00 ATCO TE 808s Protection & Control (808s Procter & Gamble) 7L13 21B relay replacement 14.38 Days
Continuous		  
09-Jun-25 08:00 23-Jun-25 17:00 ATCO TE 845s Protection & Control (845s Big Mountain), 845s RTU/SCADA (845s Big Mountain) 7L13 21B relay replacement and RTU changes required to incorporate new 21B relay 14.38 Days
Continuous		  
09-Jun-25 08:00 12-Jun-25 16:00 ATCO RB 7L61 (780s Lubicon - 796s Nipisi) climbing inspection 3.33 Days
Continuous		  
09-Jun-25 08:00 10-Jun-25 16:00 ENMAX Outage 33.83L (SS-33 - SS-41), 41B138-33.83 (SS-41) breaker maintenance - 41B138-33.83 1.33 Days
Continuous		  
09-Jun-25 08:00 12-Jun-25 16:00 ENMAX Outage 43.1TR (SS-43) tap changer inspection,.reversing switch check and oil sampling 3.33 Days
Continuous		  
09-Jun-25 08:00 12-Jun-25 16:00 ENMAX Outage 13.2TR (SS-13) transformer power factor test, secondary cable test, transformer maintenance, relay fault pressure test, reversing switch check and oil sampling 3.33 Days
Continuous		  
09-Jun-25 08:00 12-Jun-25 16:00 ENMAX Outage 5.1TR (SS-5) transformer power factor test, secondary cable test, transformer maintenance and relay fault pressure test 3.33 Days
Continuous		  
09-Jun-25 08:00 09-Jun-25 16:00 ENMAX TE RTU/SCADA (SS-33) upgrade SDN 8 Hours
Continuous		  
09-Jun-25 09:00 10-Jun-25 16:00 ATCO Outage 700s 707C (700s Bonnyville) breaker maintenance 31 Hours
Continuous		  
09-Jun-25 09:00 13-Jun-25 17:00 BCH Outage 5L75 (BCH Ashton Creek - BCH Revelstoke G.S.) replace damaged insulators, BC Hydro maintenance does not affect the Alberta ATC 4.33 Days
Continuous		 AB-BC
09-Jun-25 09:30 12-Jun-25 16:30 ATCO Outage 7L92 (777s Vilna - 7LA92 tap) Interphase spacers and climbing inspection 3.29 Days
Continuous		  
09-Jun-25 09:30 13-Jun-25 17:30 ATCO Outage 764s 701 (764s Heisler), 764s 701T (764s Heisler) maintenance and testing on transformer, tap changer and breaker 4.33 Days
Continuous		  
09-Jun-25 09:30 10-Jun-25 17:30 ATCO Outage 801s 902 (801s Anderson) breaker min oil HLR partial testing 1.33 Days
Continuous		  
09-Jun-25 10:00 10-Jun-25 17:30 ATCO Outage 813s Little Smoky 144kV Bus 1 DFR updates for AESO streaming

- Replace 700PT disconnects
- Wire 700PTY2 to DFR2		 31.5 Hours
Continuous		  
09-Jun-25 10:00 10-Jun-25 20:00 SUNCOR TE 29EDD-94 RTU/SCADA (29EDD-94 Voyageur) check PMU data collection - AESO not receiving DATA from Voyageur 1.42 Days
Continuous		  
09-Jun-25 11:00 09-Jun-25 17:00 ALTALINK TE 59s Protection & Control (59s Peigan) investigate/repair 956L protection communication trouble between 59s and 103s 6 Hours
Daily		  
09-Jun-25 11:00 09-Jun-25 17:00 ALTALINK TE 103s Protection & Control (103s Goose Lake) investigate/repair 956L protection communication trouble between 59s and 103s 6 Hours
Daily		  
09-Jun-25 12:00 12-Jun-25 17:00 ATCO Outage 951s SVC (951s Thickwood), 951s 919 (951s Thickwood Hills) semi-annual inspection and maintenance 3.21 Days
Continuous		  
09-Jun-25 12:30 11-Jun-25 19:00 ALTALINK Outage 723s 240kV Bus 2 (723s Christina Lake), 723s T2 (723s Christina Lake), 723s 252 (723s Christina Lake), 723s 652 (723s Christina Lake), 723s 12 (723s Christina Lake) 25 kV breaker maintenance, doble, maintenance, leaks repair on transformer, replace cooper cutouts w/ new polymer cutouts and wormgear handle repair 2.27 Days
Continuous		  
09-Jun-25 13:00 12-Jun-25 17:00 ALTALINK Outage 370s 23 (370s North Lethbridge) First Trip, breaker maintenance 3.17 Days
Continuous		  
10-Jun-25 00:00 11-Jun-25 23:30 EPCOR Outage T4 (Rossdale) Rossdale - TX4 outage, for only a 4 hour period to remove TX3 from site 1.98 Days
Continuous		  
10-Jun-25 07:00 11-Jun-25 18:00 ALTALINK Outage 671L (39s Bickerdike - 58s Edson) Install new span of OPGW between 671L69 and 671L70 1.46 Days
Continuous		  
10-Jun-25 07:00 13-Jun-25 17:00 ALTALINK TE 671L (39s Bickerdike - 58s Edson) fix the broken fibers of this OPGW and splice the new section to the existing one 3.42 Days
Continuous		  
10-Jun-25 07:00 11-Jun-25 17:00 ALTALINK RB 758L (534s Eckville - 757L tap), 757L (17s Benalto - 758L tap), 757L (297s Rimbey - 758L tap) urgent - prep work needed for 758L structure replacement taking place on June 12 1.42 Days
Daily		  
10-Jun-25 08:00 12-Jun-25 17:00 ATCO, CNRL TE 838s RTU/SCADA (838s Horizon Mining) RTU updates 2.38 Days
Continuous		  
10-Jun-25 08:00 12-Jun-25 17:00 CNRL TE 842s RTU/SCADA (842s Horizon Upgrading) RTU updates 2.38 Days
Continuous		  
10-Jun-25 08:00 11-Jun-25 17:00 ALTALINK TE 405s Protection & Control (405s Waupisoo) card replacement on 405s B21/25SC/L7 (796L) 1.38 Days
Daily		  
10-Jun-25 08:00 11-Jun-25 17:00 ALTALINK, ALPAC TE 282s Protection & Control (282s Grassland (Alpac)) card replacement on 282s B21/L1 (796L) 1.38 Days
Daily		  
10-Jun-25 08:00 11-Jun-25 17:00 ALTALINK TE 62s RTU/SCADA (62s Brazeau Plant), AltaLink RTU/SCADA (AltaLink) 2025 MPLS firmware upgrade 1.38 Days
Daily		  
10-Jun-25 08:00 10-Jun-25 17:00 ALTALINK TE 618s RTU/SCADA (618s Riverbend) install new configuration on LAN-PS1 RS416 to fix outstanding deficiencies 9 Hours
Daily		  
10-Jun-25 08:00 11-Jun-25 15:00 ALTALINK TE 39s Protection & Control (39s Bickerdike) move and function test the reclose signals 31 Hours
Daily		  
10-Jun-25 08:00 11-Jun-25 17:00 ALTALINK TE AltaLink Telecom Equipment 83s Taber to 158s Vauxhall MW radio hop, increase bandwidth capacity from 25Mbps to 178Mbps, iInstall new IRU600V4 to salvage existing IRU600 1.38 Days
Daily		  
11-Jun-25 06:00 11-Jun-25 17:00 ATCO IO ATCO RTU/SCADA SOC2 backup control centre activation
11 Hours
Continuous		  
11-Jun-25 07:00 12-Jun-25 12:00 ATCO, CNRL Outage 859s 703 (859s Primrose) Testing of breaker 703 trip coils for PRC-005 29 Hours
Continuous		  
11-Jun-25 07:00 11-Jun-25 18:00 ALTALINK, EPCOR Outage 1139L (367s Harry Smith - EP Riverview) ALTALINK - 1139L - GOI @ RIVERVIEW 11 Hours
Continuous		  
11-Jun-25 08:00 12-Jun-25 16:00 ENMAX Outage 33.84L (SS-33 - SS-43), 43B138-33.84 (SS-43) HV Breaker Maintenance - 43B138-33.84 1.33 Days
Continuous		  
11-Jun-25 08:00 11-Jun-25 17:00 ALTALINK TE 799s RTU/SCADA (799s Coleman) coordinated failover to expand RTU database 9 Hours
Daily		  
11-Jun-25 08:00 12-Jun-25 17:00 ALTALINK TE 368s RTU/SCADA (368s Burdett) replacing LAN ES1 1.38 Days
Daily		  
11-Jun-25 08:00 12-Jun-25 19:00 CascadeP Trans Test 1047s GS003 (1047s Whisky Jack), 1047s GS005 (1047s Whisky Jack) POW testing 1.46 Days
Continuous		  
11-Jun-25 08:00 11-Jun-25 17:00 ALTALINK TE AltaLink Telecom Equipment 2025 MPLS firmware upgrade at 62s Brazeau. The work will be completed remotely by MPLS engineer. ACC Supervisory of 62s will be down during outage, 62s AGC will be rerouted in 50m/s, TPR circuits will maintain redundant protection at all times. 9 Hours
Daily		  
11-Jun-25 08:00 12-Jun-25 17:00 ALTALINK TE AltaLink Telecom Equipment Job scope: Rogers is performing a upgrade to some equipment which will result in a fiber outage between 2002s & 103s. 887L RAS & 1201L RAS & 1201L A&B, Supervisory to 48s, B1s & 1201L fault locator will be re-routed in 50ms. ACC, AESO & BC Hydro will receive RAS comm fail alarm.. 1.38 Days
Daily		  
11-Jun-25 08:30 12-Jun-25 14:00 ENMAX Outage 24.81L (SS-24 - SS-31) Grounding improvements. Replace both existing overhead shield wire connections to A-frames. 29.5 Hours
Continuous		  
11-Jun-25 08:30 11-Jun-25 17:00 ALTALINK TE 35s Protection & Control (35s Rundle) PRC maintenance on protection - 85L A21/67N/L1 8.5 Hours
Daily		  
11-Jun-25 09:30 11-Jun-25 17:00 ATCO Outage 739s 602 (739s Edith Lake), 6L11 (739s Edith Lake - 854s Swan Dive) BREAKER SF6 PM-C PARTIAL TESTING - 602 @ 739S 7.5 Hours
Continuous		  
11-Jun-25 09:30 12-Jun-25 17:30 ATCO Outage 801s 903 (801s Anderson) BREAKER MIN OIL HLR PARTIAL TESTING - BREAKER 903 @ 801S 1.33 Days
Continuous		  
11-Jun-25 10:00 11-Jun-25 12:00 ATCO Outage 717s 701 (717s Ethel Lake), 7L28 (717s Ethel Lake - 846s Grand Centre) PRC-005 TRIP COIL TESTING 2 Hours
Continuous		  
11-Jun-25 10:00 12-Jun-25 17:30 ATCO Outage 813s Little Smoky 144kV Bus 2 DFR updates for AESO streaming

- Replace 704PT disconnects
- Wire 704PTY2 to DFR2		 31.5 Hours
Continuous		  
12-Jun-25 02:00 12-Jun-25 16:00 EPCOR Outage 987s GT1 (987s Clover Bar), 987s CGB1 (987s Clover Bar) metering upgrade 14 Hours
Continuous		  
12-Jun-25 06:00 12-Jun-25 18:00 ALTALINK Outage 534s T1 (534s Eckville), 758L (534s Eckville - 757L tap) URGENT Arctic arrow crew will require a GOI on 758L to replace structure 41. 12 Hours
Daily		  
12-Jun-25 07:00 13-Jun-25 17:00 ALTALINK, EPCOR Outage 1045L (310p Sundance - 1045AL tap), 1045L (EP 805s Jasper - 1045AL tap), 1045AL (320p Keephills - 1045L tap), EP 805s J2407 (EP 805s Jasper), EP 805s J2406 (EP 805s Jasper) insulator repair 1.42 Days
Continuous		  
12-Jun-25 07:00 17-Jun-25 17:00 SUNCOR Outage 635EDD-1001 144kV Bus 635PP-1007 (635EDD-1001), 635EDD-1001 635PS-1081 (635EDD-1001), 635EDD-1001 635PS-1087 (635EDD-1001), 635EDD-1001 635PS-1091 (635EDD-1001), 635EDD-1001 635PS-1095 (635EDD-1001), 635EDD-1001 635PS-1101 (635EDD-1001), 635EDD-1001 635PS-1107 (635EDD-1001) 635PP-1007 outage for maintenance 5.42 Days
Continuous		  
12-Jun-25 07:00 13-Jun-25 17:00 ALTALINK Outage 1045L (310p Sundance - 1045AL tap) 1045L: Aerial: Insulator Repair and Relay: Op Checks 1.42 Days
Continuous		  
12-Jun-25 07:00 12-Jun-25 17:00 EPCOR Outage K724 (Kennedale), 72CK12 (987s Clover Bar - Kennedale) Kennedale: K724 Switching School Training 10 Hours
Continuous		  
12-Jun-25 07:30 13-Jun-25 17:30 ALTALINK RB 671L (39s Bickerdike - 58s Edson) complete OPGW splice at structure 671L70 1.42 Days
Daily		  
12-Jun-25 08:00 12-Jun-25 17:00 ALTALINK TE 489s RTU/SCADA (489s Petro Canada Brazeau River) 2025 MPLS firmware, chassis and raw socket upgrade at 489s Petro Canada Brazeau River 9 Hours
Daily		  
12-Jun-25 08:00 13-Jun-25 17:30 ALTALINK TE 678s RTU/SCADA (678s Okotoks) download updated configuration, and complete points check, install and commission new port server 1.4 Days
Daily		  
12-Jun-25 08:00 12-Jun-25 17:00 ALTALINK TE 312s RTU/SCADA (312s Fidler) urgent - replace failing LAN switch 9 Hours
Daily		  
12-Jun-25 08:30 14-Jun-25 19:00 ALTALINK Outage 723s 240kV Bus 1 (723s Christina Lake), 723s T1 (723s Christina Lake), 723s 152 (723s Christina Lake), 723s 1652 (723s Christina Lake), 723s 4 (723s Christina Lake) filter pack leak repair, maintenance 2.44 Days
Continuous		  
12-Jun-25 09:30 13-Jun-25 17:00 ATCO Outage 739s 701 (739s Edith Lake), 7L43 (739s Edith Lake - 809s Louise Creek) BREAKER SF6 HGF COMPLETE TESTING - 701 @ 739S 31.5 Hours
Continuous		  
13-Jun-25 07:00 13-Jun-25 18:00 ALTALINK Outage 123L (19s Wabamun - 352s Onoway), 352s T1 (352s Onoway), 352s 123 (352s Onoway), 19s 123 (19s Wabamun) repairing woodpecker damage on structures 267, 268, 269, 271 and 279 11 Hours
Daily		  
13-Jun-25 08:00 13-Jun-25 11:00 ENMAX Outage 14.83L (SS-14 - SS-36), 36B138-14.83 (SS-36) HV breaker SF6 gas sample - 36B138-14.83 3 Hours
Continuous		  
13-Jun-25 11:00 13-Jun-25 13:00 ENMAX, ALTALINK Outage 36.81L (44s Bearspaw Plant - SS-36), 36B138-36.81 (SS-36) HV breaker SF6 gas sample - 36B138-36.81 2 Hours
Continuous		  
13-Jun-25 11:00 13-Jun-25 13:00 ENMAX, ALTALINK IO 36.81L (44s Bearspaw Plant - SS-36) HV breaker SF6 gas sample - 36B138-36.81 2 Hours
Daily		  
13-Jun-25 13:00 13-Jun-25 16:00 ENMAX Outage 36B138-36BT3 (SS-36) HV breaker SF6 gas sample - 36B138-36BT3 3 Hours
Continuous		  
13-Jun-25 17:00 11-Feb-26 17:00 EPCOR Outage T3 (Rossdale) Rossdale - TX3 LCR 243.04 Days
Continuous		  

Prepared On:   2025-06-04   14:41:09

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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