Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2024-11-02

The table below contains the significant transmission outages submitted as tentative to the AESO.
These Outages have not yet necessarily been approved, but are listed for awareness and coordination purposes.
An Outage has been considered significant for this table if it meets any one (1) or more of the following criteria:
  1. it affects a transmission facility operating at two hundred and forty (240) kV or greater;
  2. it affects an intertie;
  3. it affects an element connecting facilities owned by two (2) or more different legal owners of transmission facilities;
  4. it affects an element that connects a generating unit or an aggregated generating facility to the interconnected electric system;
  5. it requires the ISO to issue a dispatch or directive for generation in order to facilitate the planned outage;
  6. it affects a cutplane limit;
  7. it limits or reduces the operability of a synchronous condenser, static VAr compensator, static compensator or other similar dynamic device; or
  8. it affects high voltage direct current facilities.
Note: Where a transmission outage requires generation curtailments, the adjustments to generation will typically happen in the hours before the scheduled transmission outage and in the hour after the element is returned to service.

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Owner From To Duration Element Scheduled Activity Affected Intertie
ALTALINK 19-Aug-24 07:00 18-Nov-24 08:00 91.08 Days
Continuous		 19s 240kV Bus A (19S Wabamun), 19s 240kV Transfer Bus (19S Wabamun) issue salvage clearance on 19s 240kV ‘A’ & Transfer Busses.  
EPCOR 16-Sep-24 07:00 15-Nov-24 17:00 60.46 Days
Continuous		 557s T1 (557s Castle Downs) S/S Tx1 outage for secondary duct bank modification  
ATCO, ALTALINK 04-Oct-24 01:05 31-Dec-24 23:59 89 Days
Continuous		 840s McNeill Station, 830L (562s Cypress - 840s McNeill Station), 840s 701T (840s McNeill Station), 840s 901T (840s McNeill Station), 840s 702C (840s McNeill Station), 840s 703C (840s McNeill Station) forced outage AB-SK
BHE Canada 05-Oct-24 00:00 29-Nov-24 17:00 55.75 Days
Continuous		 120s C1 (120s Picture Butte) forced outage  
EPCOR 07-Oct-24 07:00 08-Nov-24 17:00 32.46 Days
Continuous		 816s T2 (816s Petrolia), 816s P2404 (816s Petrolia), 816s P2405 (816s Petrolia), 816s PAB2 (816s Petrolia), 816s ELSP72 (816s Petrolia), 816s BESS-1-1 (816s Petrolia), 816s PV-1-1 (816s Petrolia) P2404 and P2405 breaker LCR  
ATCO 07-Oct-24 10:00 07-Nov-24 17:00 31.33 Days
Continuous		 9L100 (801s Anderson - 807s Sheerness), 807s 902T (807s Sheerness), 807s 902 (807s Sheerness), 801s 910 (801s Anderson), 801s 911 (801s Anderson), 801s 910A (801s Anderson), 801s 911A (801s Anderson), 801S 9L100D1 (801s Anderson), 807S 902B (807s Sheerness) replace breaker 902 at 807s  
ALTALINK 07-Oct-24 10:00 29-Nov-24 10:00 53.04 Days
Continuous		 62s 11 (62s Brazeau Plant) maintenance  
ATCO 15-Oct-24 11:00 08-Nov-24 17:30 24.31 Days
Continuous		 840s McNeill Station, 840s 701T (840s McNeill Station), 840s 901T (840s McNeill Station), 840s 901 (840s McNeill Station), 840s 701 (840s McNeill Station), 840s 702C (840s McNeill Station), 840s 703C (840s McNeill Station) transformer 701T and 901T bushing replacements and annual maintenance AB-SK
EPCOR 28-Oct-24 07:00 02-Nov-24 17:00 5.42 Days
Continuous		 1164L (816s Petrolia - EP Riverview), RW2401 (EP Riverview), RW2402 (EP Riverview), 816s P2403 (816s Petrolia), 816s P2404 (816s Petrolia), 816s PDS12 (816s Petrolia), RWDS11 (EP Riverview) P2404 breaker LCR commissioning, disconnect maintenance and insulator replacement  
ATCO 29-Oct-24 09:00 05-Nov-24 17:00 7.38 Days
Continuous		 7L171 (802s Michichi Creek - 804s Wintering Hills) 7L171 critical crossing, Line to Ground and Line to Line Mitigation.
Cross arm and insulator replacement on 7L171, 30 Structures		  
ALTALINK 30-Oct-24 07:15 02-Nov-24 17:45 3.44 Days
Continuous		 1206L (12s Heartland - 89s Ellerslie) WMP: replace insulator at structure 43. replace jumper at structure 32. repair download and install ground rod at structure 59. replace broken insulators at structures 100, 103  
ALTALINK 03-Nov-24 07:15 04-Nov-24 17:45 1.44 Days
Continuous		 1212L (12s Heartland - 89s Ellerslie) WMP: Replace insulator at structure 46, 48. Replace jumper at structure 32  
ALTALINK, EPCOR 04-Nov-24 07:00 05-Nov-24 17:00 1.42 Days
Continuous		 1044L (EP 805s Jasper - 816s Petrolia), 816s P2405 (816s Petrolia), 816s P2406 (816s Petrolia), EP 805s J2403 (EP 805s Jasper), EP 805s J2404 (EP 805s Jasper) Petrolia and Jasper/1044L: P2405 Breaker LCR Commissioning (PDS14 Op Checks) and Jasper DFR Cutover and Commissioning  
EPCOR 04-Nov-24 07:00 07-Nov-24 10:00 3.13 Days
Continuous		 987s GT1 (987s Clover Bar) Cloverbar: maintenance  
EPCOR 04-Nov-24 07:00 08-Nov-24 17:00 4.42 Days
Continuous		 330P GT2 (330p Genesee) Genesee: Op checks  
ALTALINK 04-Nov-24 07:30 07-Nov-24 14:30 3.29 Days
Continuous		 37s T5 (37s North Calder), 37s T6 (37s North Calder), 37s 138kV Bus (37s North Calder), 37s 4 (37s North Calder) Switch replacement (37s3)  
ATCO, CNRL 04-Nov-24 08:00 06-Nov-24 10:00 2.08 Days
Continuous		 838s 75-BC-1916 (838s Horizon Mining) urgent replaced failed 260 kV dead tank breaker heaters  
ALTALINK 04-Nov-24 08:00 09-Nov-24 17:00 5.38 Days
Continuous		 760L (760AL tap - 7LA760 tap) Replace cross arms and insulators on 7L760, 242 structures  
ALTALINK, EPCOR 04-Nov-24 09:30 15-Nov-24 17:00 11.31 Days
Continuous		 915L (38s East Edmonton - 987s Clover Bar), 987s C2403 (987s Clover Bar), 987s C2405 (987s Clover Bar) 915L: Cloverbar Teleprotection Upgrade w/AltaLink  
ALTALINK, EPCOR 04-Nov-24 09:30 15-Nov-24 17:00 11.31 Days
Continuous		 915L (38s East Edmonton - 987s Clover Bar), 38s 7152 (38s East Edmonton), 38s 7252 (38s East Edmonton) 915L Cloverbar Teleprotection Upgrade w/AltaLink  
ATCO 04-Nov-24 10:00 07-Nov-24 16:30 3.27 Days
Continuous		 7L50 (757s Battle River - 491L tap) Structure, cross arm and insulator replacement on 7L50 between battle river and Jarrow.  
ATCO 04-Nov-24 10:00 08-Nov-24 16:00 4.25 Days
Continuous		 951s 901T (951s Thickwood Hills), 951s 902T (951s Thickwood Hills), 951s SVC (951s Thickwood) SVC fall inspections and maintenance, IPCOMM (SVC Data Concentrator) relay replacement/ commissioning/ RTU Config updates  
ATCO 05-Nov-24 08:00 08-Nov-24 16:00 3.33 Days
Continuous		 930s Syn Condenser (930s Arcenciel) maintenance on Synchronous Condenser  
BCH 05-Nov-24 09:00 08-Nov-24 17:00 3.33 Days
Continuous		 5L91 (BCH Ashton Creek - BCH Selkirk) Outage required to replaced badly damaged portion of steel tower 39-2, discovered during September 2024 line maintenance BC maintenance does not affect the Alberta ATC AB-BC
ATCO, CNRL 06-Nov-24 13:00 08-Nov-24 10:00 1.88 Days
Continuous		 838s 75-BC-1912 (838s Horizon Mining) urgent - replace 260 kV dead tank breaker heaters  
EPCOR 07-Nov-24 07:00 11-Nov-24 10:00 4.13 Days
Continuous		 987s GT3 (987s Clover Bar) Cloverbar: maintenance  
ALTALINK 07-Nov-24 09:00 07-Nov-24 14:00 5 Hours
Daily		 925L (63s Red Deer - 74s Janet) 925L Dead end Hardware on the A frame at 74s  
ENMAX 08-Nov-24 08:00 08-Nov-24 12:00 4 Hours
Continuous		 162B240-RB131 (SS-162) CT Terminal Block Replacement  
ENMAX, ALTALINK 08-Nov-24 08:00 12-Nov-24 16:00 4.33 Days
Continuous		 936L (5s East Calgary - 102s Langdon) Tower climbing inspections. Install dampers  
ENMAX, ALTALINK 08-Nov-24 08:00 12-Nov-24 16:00 4.33 Days
Continuous		 937L (5s East Calgary - 102s Langdon) Tower climbing inspections. Install dampers  
ENMAX, ALTALINK 08-Nov-24 08:00 12-Nov-24 16:00 4.33 Days
Continuous		 936L (5s East Calgary - 102s Langdon) Tower climbing inspections. Install dampers.  
ENMAX, ALTALINK 08-Nov-24 08:00 12-Nov-24 16:00 4.33 Days
Continuous		 937L (5s East Calgary - 102s Langdon) Tower climbing inspections. Install dampers.  
ENMAX 08-Nov-24 12:00 08-Nov-24 16:00 4 Hours
Continuous		 162B240-RB132 (SS-162) CT Terminal Block Replacement  
ATCO, CNRL 08-Nov-24 13:00 11-Nov-24 18:00 3.21 Days
Continuous		 838s 75-BC-1911 (838s Horizon Mining) Heater Replacement  
EPCOR 10-Nov-24 07:00 19-Nov-24 10:00 9.13 Days
Continuous		 987s GT2 (987s Clover Bar) Cloverbar: maintenance  
ALTALINK 11-Nov-24 07:00 11-Nov-24 11:00 4 Hours
Daily		 879L (244s Bowmanton - 879AL tap), 879L (368s Burdett - 879L tap) Open East side jumpers at Str 457A. Install and Commission new CT circuits to new RAS protections  
EPCOR, ALTALINK 11-Nov-24 07:00 13-Nov-24 17:00 2.42 Days
Continuous		 330p 1208 (330p Genesee), 330p 1209 (330p Genesee), 1209L (89s Ellerslie - 330p Genesee) Genesee: 1209L RTU Upgrade Project
• Scope of Work: Re work EPCOR SCADA RTU Open / Close Commands to 1209LD (Line Disconnect), Open / Close Commands to 1209 breaker. Move all status indications from above equipment to the new RTU as well as alarm indications.
• Equipment worked on directly requir		  
ALTALINK, EPCOR 11-Nov-24 07:00 13-Nov-24 17:00 2.42 Days
Continuous		 1209L (89s Ellerslie - 330p Genesee) Genesee: 1209L - RTU Upgrade Project Cutovers/Commissioning  
ALTALINK 11-Nov-24 09:00 22-Nov-24 12:00 11.13 Days
Continuous		 15s 138kV Bus1 (15s Fort Macleod), 15s T1 (15s Fort Macleod), 180L (15s Fort Macleod - 180AL tap), 463L (15s Fort Macleod - 463AL tap) Install and commission new T1 protections, 15s22 control, VT1 distribution, 138kV bus differential protection upgrades, 138V/25kV trip testing pertaining to the 15s building upgrade project.  
ALTALINK 11-Nov-24 11:00 21-Nov-24 14:00 10.13 Days
Continuous		 879L (244s Bowmanton - 879AL tap) Replace cross-arms, pole replacement and bird diverter installation between str 303-450 - VATD. Update line protection settings and RAS.  
EPCOR 12-Nov-24 07:00 14-Nov-24 17:00 2.42 Days
Continuous		 52s T2 (52s East Industrial), 52s E2402 (52s East Industrial) East Industrial: TX2 MV BUS OC Upgrade Cutovers and Commissioning  
ALTALINK 12-Nov-24 07:00 14-Nov-24 18:00 2.46 Days
Continuous		 1041L (370s North Lethbridge - 554s Travers) *P5* South will be replacing dampers on 1041L195,196, 221, 223, 267, 269 See also 291617 1005L (356s-I_991s_120s) RB, that goes with this due to proximity  
EPCOR 12-Nov-24 07:00 13-Dec-24 17:00 31.42 Days
Continuous		 816s P2402 (816s Petrolia) Petrolia: P2402 Breaker LCR  
ENMAX 12-Nov-24 08:00 12-Nov-24 12:00 4 Hours
Continuous		 162B240-RB134 (SS-162) CT Terminal Block Replacement  
ALTALINK, EPCOR 12-Nov-24 08:00 15-Nov-24 17:00 3.38 Days
Continuous		 1043L (320p Keephills - 367s Harry Smith) Replace CVT1 and 1043L strain insulators.  
BCH 12-Nov-24 09:00 22-Nov-24 17:00 10.33 Days
Continuous		 T3 (BCH Natal) NTL station rebuild. T3 OOS for PN replacement AB-BC
EPCOR 13-Nov-24 07:00 15-Nov-24 17:00 2.42 Days
Continuous		 805s T1 (805s Jasper), 72JM18 (EP 805s Jasper - Meadowlark), 72JW19 (EP 805s Jasper - Woodcroft), EP 805s J722 (EP 805s Jasper), EP 805s J724 (EP 805s Jasper) Jasper: TX1 DFR Cutovers and Commissioning  
ENMAX, ALTALINK 13-Nov-24 08:00 13-Nov-24 12:00 4 Hours
Continuous		 7.82L (42s Sarcee - SS-7), 7B138-7.82 (SS-7) Breaker Trip Circuit Test - 7B138-7.82, Trip Coil Test - 7B138-7.82  
ENMAX 13-Nov-24 08:00 13-Nov-24 18:00 10 Hours
Continuous		 162.1TR (SS-162) Oil Sampling TC, Bushing. Check reversing switch.  
SUNCOR 13-Nov-24 08:00 20-Nov-24 18:00 7.42 Days
Continuous		 29EDD-71 29PT-234 (29EDD-71) Firebag: 6 year PM 30EDD240 30PP-121 system  
ATCO 13-Nov-24 09:00 14-Nov-24 16:00 31 Hours
Continuous		 9L59 (801s Anderson - 9LA59 tap), 801s 902 (801s Anderson), 801s 903 (801s Anderson) DFR Upgrade at Anderson.
Cutover and commission the following inputs to the new DFR: CT902-X, CT903-Y, 902PTY2, 902 status, and 903 status.
Demo inputs from existing DSM: CT902-X, CT903-Y, and 902PTY1.
Cutover 903A from existing RTU I/O to new SEL DPAC I/O and verify status and control to local HM		  
ATCO 13-Nov-24 09:00 18-Nov-24 17:00 5.33 Days
Continuous		 7L171 (802s Michichi Creek - 804s Wintering Hills) 7L171 critical crossing, Line to Ground and Line to Line Mitigation.
Cross arm and insulator replacement on 7L171, 30 Structures		  
ATCO 13-Nov-24 09:00 20-Nov-24 17:00 7.33 Days
Continuous		 7L81 (791s Rainbow Lake - BCH Harvest Energy FNC Tap), 791s 702 (791s Rainbow Lake) 7L81 upgrade @ 791S and
scada system upgrade @ 791S		  
ALTALINK 13-Nov-24 12:00 13-Nov-24 17:30 5.5 Hours
Daily		 244s 3152 (244s Bowmanton), 244s 3252 (244s Bowmanton), 879L (244s Bowmanton - 879AL tap) Cutover CTs to new PMU for 244s voltage control project.  
EPCOR 14-Nov-24 07:00 15-Nov-24 17:00 1.42 Days
Continuous		 330p 1208 (330p Genesee) Genesee: 1208 Bay RTU Upgrade Project
• Scope of Work: Re work EPCOR SCADA Open / Close Commands to 1208 breaker. Move all status indications from above equipment to the new RTU as well as alarm indications.
• Equipment worked on directly requiring outage: 1208 Breaker
• Emergency Restoration tim		  
ENMAX 14-Nov-24 08:00 14-Nov-24 12:00 4 Hours
Continuous		 25B240-D142 (SS-25) Breaker Trip Circuit Test - 25B240-D142  
ENMAX 14-Nov-24 08:00 14-Nov-24 18:00 10 Hours
Continuous		 162.2TR (SS-162) Oil Sampling TC, Bushing. Check reversing switch.  
ATCO 14-Nov-24 08:30 14-Nov-24 16:30 8 Hours
Continuous		 7L65 tap, 7L65 (709s Vegreville - 7LA65 tap), 7L65 (710s Vermilion - 7LA65 tap), 7LA65 (708s Grizzly Bear - 7L65 tap) Replace Damaged 7LA65D1 switch vacuum bottles. Full Line Outage on 7L65 required.
Inspect and make adjustments to 7LA65D1, 7L65D2, 7L65D3		  
ENMAX 15-Nov-24 08:00 15-Nov-24 12:00 4 Hours
Continuous		 25B240-D138 (SS-25) Breaker Trip Circuit Test - 25B240-D138  
ATCO 15-Nov-24 09:00 16-Nov-24 16:00 31 Hours
Continuous		 801s 903 (801s Anderson), 801s 904 (801s Anderson), 9L70 (801s Anderson - 946s Oakland) Cutover and commission the following inputs to the new DFR: CT903-X, CT904-Y, and 904 status.  
ENMAX 15-Nov-24 12:00 15-Nov-24 16:00 4 Hours
Continuous		 25B240-D139 (SS-25) Breaker Trip Circuit Test - 25B240-D139  
ATCO 17-Nov-24 09:00 18-Nov-24 16:00 31 Hours
Continuous		 9L950 (132s Ware Junction - 801s Anderson), 801s 911 (801s Anderson), 801s 912 (801s Anderson) DFR Upgrade at Anderson.
Cutover and commission the following inputs to the new DFR: CT911-X & CT912-X, 911PTY2, and 912 status.
Demo inputs from existing DSM: CT911-X & CT912-X, 911PTY1
PRC-005 - TRIP & CLOSE COIL TESTING - BREAKER 912		  
ALTALINK, DOW 18-Nov-24 07:00 19-Nov-24 17:00 1.42 Days
Continuous		 166s T1 (166s Dow Chemical Fort Saskatchewan) maintenance  
EPCOR 18-Nov-24 07:00 19-Nov-24 17:00 1.42 Days
Continuous		 330P 12TC1 (330p Genesee), 330p 805 (330p Genesee), 330p 1210 (330p Genesee), 330p 1214 (330p Genesee), 330p 1201 (330p Genesee), 330p 1204 (330p Genesee), 330p 1207 (330p Genesee) Genesee: 500kV BUS 1 RTU Upgrade Project
• Scope of Work: Re work EPCOR SCADA RTU Open / Close Commands to 12TC1D (TX Disconnect), Raise / Lower and Auto / Manual controls to 12TC1 transformer.
• Equipment worked on directly requiring outage: 12TC1D and 12TC1 Transformer
• Emergency Restoration 		 
ALTALINK 18-Nov-24 07:00 21-Nov-24 18:00 3.46 Days
Continuous		 19s T10 (19s Wabamun), 19s 240kV Bus A (19S Wabamun), 905L (19s Wabamun - 37s North Calder), 902L (19s Wabamun - 310p Sundance) Proximity outage to complete the salvage of 19s 240kV ‘A’ Bus & 240kV Transfer Bus. Replace 19s905 CTs. RSLD 3 to be implemented at the start of the outage.  
EPCOR 18-Nov-24 07:00 23-Nov-24 17:00 5.42 Days
Continuous		 EP 803s T2 (EP 803s Lambton), EP 803s L2402 (EP 803s Lambton), EP 803s L2405 (EP 803s Lambton) Lambton: LDS9 LCR and TX2 Leak Repair and L2402 P&C Maintenance  
ALTALINK, TRANSALTA 18-Nov-24 07:30 19-Nov-24 16:30 1.38 Days
Continuous		 733L (179s Gleichen - 428s Namaka), 179s 733 (179s Gleichen) Add A27 and B27 Protections (new secondary CT circuits)  
ENMAX 18-Nov-24 08:00 18-Nov-24 12:00 4 Hours
Continuous		 65B240-D130 (SS-65) Trip Circuit Testing - 65B240-D130  
ATCO 18-Nov-24 08:30 21-Nov-24 17:30 3.38 Days
Continuous		 9L36 (825s Whitefish Lake - 826s Marguerite Lake), 825s 902 (825s Whitefish Lake), 825s 906 (825s Whitefish Lake) 902 PRC Trip Coil Testing
9L36 PRC Aux. relay testing
9L36 RTXP replacement		  
ALTALINK, EPCOR 18-Nov-24 09:30 29-Nov-24 17:00 11.31 Days
Continuous		 921L (71s Lamoureux - 987s Clover Bar), 987s C2404 (987s Clover Bar), 987s C2406 (987s Clover Bar) 921L: Cloverbar Teleprotection Upgrade w/AltaLink  
ALTALINK, EPCOR 18-Nov-24 09:30 29-Nov-24 17:00 11.31 Days
Continuous		 921L (71s Lamoureux - 987s Clover Bar), 71s 1252 (71s Lamoureux), 71s 1352 (71s Lamoureux) 921L Cloverbar Teleprotection Upgrade w/AltaLink  
ALTALINK 18-Nov-24 11:30 18-Nov-24 17:00 5.5 Hours
Daily		 901L (74s Janet - 901AL tap), 901L (63s Red Deer - 901AL tap), 901AL (64s East Crossfield - 901L tap) First trip and breaker maintenance 74s2552 and replace hardware on the A frame.  
ALTALINK 18-Nov-24 13:00 19-Nov-24 16:30 27.5 Hours
Continuous		 205s 452 (205s Castle Rock Ridge), 205s 352 (205s Castle Rock Ridge), 1071L (205s Castle Rock Ridge - 312s Fidler) 205s452 Breaker maintenance and first trip. Exercise/ repair 205s7.  
ALTALINK 18-Nov-24 13:00 22-Nov-24 17:00 4.17 Days
Continuous		 702L (137s Sedgewick - 377s AML Hardisty) 702L Component Replacement (STR 269 - 455)  
ATCO 18-Nov-24 13:00 25-Nov-24 08:00 6.79 Days
Continuous		 7L40 (733s Simonette - 813s Little Smoky) 7l40 Line to ground mitigation  
ALTALINK 18-Nov-24 17:00 22-Nov-24 17:00 4 Days
Continuous		 74s 2552 (74s Janet) First trip and breaker maintenance.  
ALTALINK 19-Nov-24 07:00 22-Nov-24 17:30 3.44 Days
Continuous		 74s 23.80W (74s Janet) Replace 74s23.80 (1352) Breaker CT  
ENMAX 19-Nov-24 07:00 22-Nov-24 17:30 3.44 Days
Continuous		 23.80L (74s Janet - SS-23) Altalink outage. Replace 74s23.80 (1352) Breaker CT. 1. Recloser block for 23.80L at C23s  
ENMAX 19-Nov-24 08:00 20-Nov-24 16:00 1.33 Days
Continuous		 65B240-D135 (SS-65) Relay Protection Test - 65RLY240-D135 (BM26)  
ATCO 19-Nov-24 09:00 21-Nov-24 16:00 2.29 Days
Continuous		 13L50 (2029s Heathfield - 2075s Newell) Bird Mitigation on 2075S DC FILTER DCF11.  
ATCO 19-Nov-24 09:00 24-Nov-24 17:00 5.33 Days
Continuous		 7L701 (757s Battle River - 7LA701 tap) Replace overhead shield wire with OPGW cable on 7L701 from Structure 1 to 11.  
ALTALINK 20-Nov-24 07:00 20-Nov-24 18:00 11 Hours
Continuous		 463L (15s Fort Macleod - 463AL tap) Replacing crossarms and insulators on Structure 106. Repairing bonding and grounding on Structures 76 & 110.  
ALTALINK, DOW 20-Nov-24 07:00 21-Nov-24 17:00 1.42 Days
Continuous		 166s T2 (166s Dow Chemical Fort Saskatchewan) maintenance  
EPCOR 20-Nov-24 07:00 22-Nov-24 17:00 2.42 Days
Continuous		 52s T1 (52s East Industrial), 52s E2401 (52s East Industrial) East Industrial: TX1 MV BUS OC Upgrade Cutovers and Commissioning  
ENMAX, ALTALINK 20-Nov-24 07:00 24-Nov-24 18:00 4.46 Days
Continuous		 50L (44s Bearspaw Plant - SS-21) Repair woodpecker damage at structures 119 & 122. Replace structures 116 & 117.  
ENMAX, ALTALINK 20-Nov-24 07:00 24-Nov-24 18:00 4.46 Days
Continuous		 50L (44s Bearspaw Plant - SS-21) Altalink outage. 50L will be removed from service to repair woodpecker damage on Structures #119 & 122. Also, crews will be replacing Structures #116 & 117. Reclose block required on 50L.  
ENMAX, ALTALINK 20-Nov-24 08:00 20-Nov-24 12:00 4 Hours
Continuous		 37.82L (74s Janet - SS-37), 37B138-37.82 (SS-37) Breaker Trip Circuit Test - 37B138-37.82  
ENMAX, ALTALINK 20-Nov-24 08:00 20-Nov-24 12:00 4 Hours
Daily		 37.82L (74s Janet - SS-37) Breaker Trip Circuit Test - 37B138-37.82  
ENMAX, ALTALINK 20-Nov-24 08:30 20-Nov-24 17:30 9 Hours
Daily		 1109L (SS-25 - SS-65) LOA issue, remove 1109L potheads from structure.  
ENMAX, ALTALINK 20-Nov-24 08:30 20-Nov-24 17:30 9 Hours
Continuous		 1109L (SS-25 - SS-65) Altalink outage. LOA issue, remove 1109L potheads from structures on ROW and in C25s  
ALTALINK 20-Nov-24 10:00 21-Nov-24 16:00 30 Hours
Continuous		 1048L (59s Peigan - 138s Windy Flats) 59s952 First Trip and Maint. replace densimeter. 59s23 switch repair.  
EPCOR 21-Nov-24 07:00 22-Nov-24 17:00 1.42 Days
Continuous		 330p 12TC2 (330p Genesee), 330p 1211 (330p Genesee), 330p 1215 (330p Genesee), 330p 809 (330p Genesee), 330p 1203 (330p Genesee), 330p 1206 (330p Genesee), 330p 1209 (330p Genesee) Genesee: 500kV BUS 2 RTU Upgrade Project
• Scope of Work: Re work EPCOR SCADA RTU Open / Close Commands to 12TC2D (TX Disconnect), Raise / Lower and Auto / Manual controls to 12TC2 transformer.
• Equipment worked on directly requiring outage: 12TC2D and 12TC2 Transformer
• Emergency Restoration		  
ENMAX 21-Nov-24 08:00 22-Nov-24 16:00 1.33 Days
Continuous		 65B240-D131 (SS-65) Relay Protection Test - 65RLY240-D131 (BMR22)  
ALTALINK, EPCOR 21-Nov-24 09:00 21-Nov-24 17:00 8 Hours
Daily		 510s 3052 (510s Sunnybrook), 510s 2952 (510s Sunnybrook), 1238L (330p Genesee - 510s Sunnybrook) Replace damaged corona ring on bus expansion joint.  
ALTALINK 21-Nov-24 14:00 21-Nov-24 18:00 4 Hours
Daily		 879L (244s Bowmanton - 879AL tap), 879L (368s Burdett - 879L tap) Close East side jumpers at Str 457A. Install and Commission new CT circuits to new RAS protection.  
ALTALINK 23-Nov-24 07:00 25-Nov-24 17:00 2.42 Days
Continuous		 725L (674s Bowron - 725AL tap) Replace protections and install new risers on 674s4  
Lethbridge, ALTALINK 23-Nov-24 07:30 25-Nov-24 17:00 2.4 Days
Continuous		 674s 725W (674s Bowron), 725L (674s Bowron - 725AL tap) Install new A & B protections and perform local commissioning at 674s.  
ALTALINK, EPCOR 25-Nov-24 07:00 29-Nov-24 17:00 4.42 Days
Continuous		 1239L (330p Genesee - 510s Sunnybrook) Genesee: 1239L - RTU Upgrade Project Cutovers/Commissioning  
ALTALINK, EPCOR 25-Nov-24 07:00 29-Nov-24 17:00 4.42 Days
Continuous		 1239L (330p Genesee - 510s Sunnybrook), 330p 1205 (330p Genesee), 330p 1206 (330p Genesee) Genesee: 1239L RTU Upgrade Project
• Scope of Work: Re work EPCOR SCADA RTU Open / Close Commands to 1239LD, Open / Close Commands to 1205 Breaker, and Open / Close Commands to 1206 Breaker
• Equipment worked on directly requiring outage: 1239LD, 1205 Breaker and 1206 Breaker.
• Emergency Restor		  
ENMAX, ALTALINK 25-Nov-24 08:00 28-Nov-24 16:00 3.33 Days
Continuous		 918L (281s Johnson - SS-162) 162 Substation -Surge Arrester Addition  
ENMAX, ALTALINK 25-Nov-24 08:00 28-Nov-24 16:00 3.33 Days
Continuous		 918L (281s Johnson - SS-162) 162 Substation -Surge Arrester Addition  
ENMAX, ALTALINK 25-Nov-24 08:00 28-Nov-24 16:00 3.33 Days
Continuous		 918L (281s Johnson - SS-162) 162 Substation -Surge Arrester Addition  
ALTALINK 25-Nov-24 08:00 07-Dec-24 17:00 12.38 Days
Continuous		 702L (137s Sedgewick - 757s Battle River) 702L Component Replacement (STR 26 - 167)  
ALTALINK 25-Nov-24 09:30 10-Dec-24 17:30 15.33 Days
Continuous		 74s 2452 (74s Janet) Replace 74s2452 Breaker to new SF6 Type  
ENMAX, ALTALINK 25-Nov-24 11:30 26-Nov-24 17:00 29.5 Hours
Continuous		 693L (42s Sarcee - SS-10) 693L U/G cables seal flooded vaults from water ingress.  
ALTALINK 26-Nov-24 07:00 26-Nov-24 17:00 10 Hours
Daily		 498s T1 (498s Tilley) Modify A87/50/51/T1 CT contribuition. Test 67/67N/79/81/96/L7 Breaker fail trip to 498s29 and 498s257E.Modify B87/50/51/51NN/T1  
ENMAX, ALTALINK 26-Nov-24 07:00 26-Nov-24 18:00 11 Hours
Continuous		 1107L (237s Foothills - SS-65) Altalink outage. Replace insulators at structure 33. Block reclosers on 1107L.  
ALTALINK 26-Nov-24 07:30 28-Nov-24 07:30 2 Days
Continuous		 15s 725 (15s Fort Macleod), 725L (15s Fort MacLeod - 725BL tap), 725BL (240s McBride Lake - 725L tap), 725L (674s Bowron - 725BL tap) 15s725 breaker outage required for installation and commissioning of new relays and circuits on 725L protections pertaining to the 15s Stage 3 building upgrade project.  
ATCO, FMGW 26-Nov-24 08:00 28-Nov-24 17:30 2.4 Days
Continuous		 1024s PT-6001 (1024s Granlea), 1024s PT-6002 (1024s Granlea) SGRE uprate work, relay work for hybrid contact swap, Firewall and network changes – remote/on-site, AE will perform point-to-point check, GE MPT 1 leak repairs.  
ALTALINK 26-Nov-24 08:30 26-Nov-24 17:30 9 Hours
Continuous		 523s 880 (523s Bullshead), 880L (321s Al Rothbauer - 523s Bullshead) Tank heater replacement  
ATCO 26-Nov-24 09:00 27-Nov-24 16:00 31 Hours
Continuous		 9L97 (801s Anderson - 946s Oakland), 801s 905 (801s Anderson), 801s 906 (801s Anderson) DFR Upgrade at Anderson.
Cutover and commission the following inputs to the new DFR: CT905-X, CT906-X, and 905 status.
Demo inputs from existing DSM: CT905-X, CT906-X
Cutover 905a / 905b / 906a from existing RTU I/O to new SEL DPAC I/O and verify status and control to local HMI and SOC.
PRC-005 - T		  
ATCO 26-Nov-24 09:00 03-Dec-24 17:00 7.33 Days
Continuous		 7L171 (802s Michichi Creek - 804s Wintering Hills) 7L171 critical crossing, Line to Ground and Line to Line Mitigation.
Cross arm and insulator replacement on 7L171, 30 Structures		  
ALTALINK 26-Nov-24 10:30 26-Nov-24 17:00 6.5 Hours
Daily		 100L (498s Tilley - 895s Suffield) 895s100 – PRC5 First Trip / breaker maintenance / PRC5  
ALTALINK 27-Nov-24 11:00 28-Nov-24 17:30 30.5 Hours
Continuous		 916L (5s East Calgary - 42s Sarcee) 916L U/G cables seal flooded vaults from water ingress.  
ALTALINK 28-Nov-24 07:00 28-Nov-24 18:00 11 Hours
Continuous		 612L (336s Fincastle - 368s Burdett) Replacing arms and insulators on structure 85 .  
ALTALINK 28-Nov-24 07:30 29-Nov-24 17:00 1.4 Days
Continuous		 725L (15s Fort MacLeod - 725BL tap), 725L (674s Bowron - 725BL tap), 725BL (240s McBride Lake - 725L tap) Line outage to perform end to end and functional testing requiring trips at 674s and 15s  
Lethbridge 28-Nov-24 07:30 29-Nov-24 17:00 1.4 Days
Continuous		 674s 725W (674s Bowron) 725LW Line outage to perform end-to-end and functional testing at 15s and 674s  
ATCO 28-Nov-24 09:00 29-Nov-24 16:00 31 Hours
Continuous		 9L933 (132s Ware Junction - 801s Anderson), 801s 907 (801s Anderson), 801s 908 (801s Anderson) DFR Upgrade at Anderson.
Cutover and commission the following inputs to the new DFR: CT907-X & CT908-Y, and 908 status.
Demo inputs from existing DSM: None
Cutover 907a / 908b / 908a / 9l933d1 / 908 alarms from existing RTU I/O to new SEL DPAC I/O and verify status and control to local HMI and SOC.		  
ATCO 30-Nov-24 09:00 01-Dec-24 16:00 31 Hours
Continuous		 9L934 (132s Ware Junction - 801s Anderson), 801s 909 (801s Anderson), 801s 910 (801s Anderson) DFR Upgrade at Anderson.
Cutover and commission the following inputs to the new DFR: CT909-X, CT910-X, 909PTY2, and 909 status.
Demo inputs from existing DSM: CT909, CT910, and 909pty1.		  
ALTALINK 02-Dec-24 07:00 02-Dec-24 12:30 5.5 Hours
Daily		 616L (59s Peigan - 616AL tap), 616L (103s Goose Lake - 616AL tap), 616AL (383s Kettles Hill Windfarm - 616L tap) Closing Open Point 'C' @ Structure #39  
ALTALINK, EPCOR 02-Dec-24 07:00 06-Dec-24 17:00 4.42 Days
Continuous		 1238L (330p Genesee - 510s Sunnybrook) Genesee: 1238L/1239 - RTU Upgrade Project Cutovers/Commissioning  
ALTALINK, EPCOR 02-Dec-24 07:00 06-Dec-24 17:00 4.42 Days
Continuous		 1209L (89s Ellerslie - 330p Genesee) Genesee: 1209L - RTU Upgrade Project Cutovers/Commissioning  
ALTALINK, EPCOR 02-Dec-24 07:00 06-Dec-24 17:00 4.42 Days
Continuous		 1238L (330p Genesee - 510s Sunnybrook), 330p 1201 (330p Genesee), 330p 1202 (330p Genesee) Genesee: 1238L RTU Upgrade Project
• Scope of Work: Re work EPCOR SCADA RTU Open / Close Commands to 1238LD, Open / Close Commands to 1201 Breaker, and Open / Close Commands to 1201 Breaker.
• Equipment worked on directly requiring outage: 1238LD, 1201 Breaker and 1202 Breaker.
• Emergency Rest		  
ATCO 02-Dec-24 10:00 09-Dec-24 08:00 6.92 Days
Continuous		 7L40 (733s Simonette - 813s Little Smoky) 7l40 Line to ground mitigation  
EPCOR 03-Dec-24 07:00 04-Dec-24 17:00 1.42 Days
Continuous		 T1 (EP Riverview), RW2405 (EP Riverview), RW2401 (EP Riverview) Riverview: RWDS1/RWAB1 Disconnect Maintenance  
ALTALINK 03-Dec-24 07:00 13-Dec-24 17:30 10.44 Days
Continuous		 74s C3 (74s Janet), 74s C4 (74s Janet) Upgrade A&B C3/C4 Protections,Implement Visimax POW for C3/C4 Breakers, Replace Optical CTs on C3/C4 with CTs and VT  
ALTALINK 04-Dec-24 07:00 08-Dec-24 18:00 4.46 Days
Continuous		 100L (498s Tilley - 895s Suffield) Upgrade 100L for 1061s Alderson Park Interconnection Project - str 242-297. Replace 100L A protection at 895s and 498s  
ALTALINK 04-Dec-24 10:00 04-Dec-24 14:00 4 Hours
Daily		 250p 11 (250p Bighorn Plant) maintenance  
ALTALINK, EPCOR 05-Dec-24 07:00 06-Dec-24 17:00 1.42 Days
Continuous		 1055L (629s Argyll Transfer Station - 816s Petrolia), 816s P2402 (816s Petrolia), 816s P2403 (816s Petrolia) Petrolia: P2402 Breaker LCR Commissioning (PDS11 Op Checks)  
ALTALINK 05-Dec-24 10:00 05-Dec-24 14:00 4 Hours
Daily		 250p 22 (250p Bighorn Plant) maintenance  
ALTALINK 08-Dec-24 07:00 08-Dec-24 17:00 10 Hours
Daily		 514BL (322s Cowley Ridge Windplant - 514L tap), 514L (396s Pincher Creek - 514BL tap), 514L (513s Lundbreck - 514BL tap) URGENT: Arctic arrow crew will require a GOI on 514L to relocate an existing nesting platform from 514L138 to an area near 514L140.  
EPCOR 09-Dec-24 07:00 10-Dec-24 17:00 1.42 Days
Continuous		 816s P2402 (816s Petrolia), 816s P2401 (816s Petrolia), 816s T1 (816s Petrolia) Petrolia: P2402 Breaker LCR Commissioning (PAB1 Op Checks)  
EPCOR 09-Dec-24 07:00 10-Dec-24 17:00 1.42 Days
Continuous		 330p 1203 (330p Genesee) Genesee: 1203 Bay RTU Upgrade Project
• Scope of Work: Re work EPCOR SCADA Open / Close Commands to 1203 breaker. Move all status indications from above equipment to the new RTU as well as alarm indications.
• Equipment worked on directly requiring outage: 1203 Breaker
• Emergency Restoration tim		  
BCH 09-Dec-24 09:00 20-Dec-24 17:00 11.33 Days
Continuous		 T4 (BCH Natal) NTL station rebuild, T4 out of service for PN replacement AB-BC
ATCO 09-Dec-24 10:00 16-Dec-24 08:00 6.92 Days
Continuous		 7L32 (811s Clairmont Lake - 862s South Bezanson) Changing rotten X Arms and rotten poles from Test and Treat  
ALTALINK 09-Dec-24 12:00 12-Dec-24 17:30 3.23 Days
Continuous		 244s 240kV Bus 1 (244s Bowmanton), 244s 138kV Bus 1 (244s Bowmanton), 244s T1 (244s Bowmanton), 244s 152 (244s Bowmanton), 244s 452 (244s Bowmanton), 244s 2189 (244s Bowmanton), 244s 2152 (244s Bowmanton), 244s 2552 (244s Bowmanton), 244s 3752 (244s Bowmanton) Connect risers to new C1 and C2. Trip test breakers and connect CTs.  
EPCOR 10-Dec-24 07:00 11-Dec-24 17:00 1.42 Days
Continuous		 330p 1204 (330p Genesee) Genesee: 1204 Bay RTU Upgrade Project
• Scope of Work: Re work EPCOR SCADA Open / Close Commands to 1204 breaker. Move all status indications from above equipment to the new RTU as well as alarm indications.
• Equipment worked on directly requiring outage: 1204 Breaker
• Emergency Restoration tim		  
ALTALINK 10-Dec-24 07:15 11-Dec-24 17:45 1.44 Days
Continuous		 926L (17s Benalto - 310p Sundance) LCM; install phase raisers on bottom phase (str24)  
ATCO 10-Dec-24 09:00 17-Dec-24 17:00 7.33 Days
Continuous		 7L171 (802s Michichi Creek - 804s Wintering Hills) 7L171 critical crossing, Line to Ground and Line to Line Mitigation.
Cross arm and insulator replacement on 7L171, 30 Structures		  
ENMAX, ALTALINK 10-Dec-24 16:30 10-Dec-24 17:30 60 Mins
Daily		 985L (74s Janet - SS-25) Line outage needed in order to energize new 74s2452 breaker via C25s  
EPCOR 11-Dec-24 07:00 12-Dec-24 17:00 1.42 Days
Continuous		 330p 1207 (330p Genesee) Genesee: 1207 Bay RTU Upgrade Project
• Scope of Work: Re work EPCOR SCADA Open / Close Commands to 1207 breaker. Move all status indications from above equipment to the new RTU as well as alarm indications.
• Equipment worked on directly requiring outage: 1207 Breaker
• Emergency Restoration tim		  
ENMAX, ALTALINK 11-Dec-24 08:00 16-Dec-24 16:00 5.33 Days
Continuous		 21.80L (42s Sarcee - SS-21) 21 Substation -Surge Arrester Addition  
ENMAX, ALTALINK 11-Dec-24 08:00 16-Dec-24 16:00 5.33 Days
Continuous		 932L (74s Janet - SS-162) 162 Substation -Surge Arrester Addition  
ENMAX, ALTALINK 11-Dec-24 08:00 16-Dec-24 16:00 5.33 Days
Continuous		 21.80L (42s Sarcee - SS-21) 21 Substation -Surge Arrester Addition  
ENMAX, ALTALINK 11-Dec-24 08:00 16-Dec-24 16:00 5.33 Days
Continuous		 932L (74s Janet - SS-162) 21 Substation -Surge Arrester Addition  
ALTALINK 12-Dec-24 07:15 13-Dec-24 18:45 1.48 Days
Continuous		 922L (17s Benalto - 310p Sundance) LCM; install phase raisers on bottom phase (str24)  
ALTALINK, TRANSALTA 12-Dec-24 13:00 16-Dec-24 17:00 4.17 Days
Continuous		 59s T1 (59s Peigan), 616L (59s Peigan - 616AL tap) Demo/Remove 59s11 and 59s8 and convert into bus support structures.  
ALTALINK 13-Dec-24 07:30 16-Dec-24 12:00 3.19 Days
Continuous		 244s 138kV Bus 2 (244s Bowmanton), 244s T2 (244s Bowmanton), 244s 240kV Bus 2 (244s Bowmanton), 244s 352 (244s Bowmanton), 244s 652 (244s Bowmanton), 244s 2389 (244s Bowmanton), 244s 2252 (244s Bowmanton), 244s 2652 (244s Bowmanton), 244s 2489 (244s Bowmanton) Connect risers to new C3. Trip test breakers and connect CTs.  
ALTALINK 15-Dec-24 07:00 19-Dec-24 18:00 4.46 Days
Continuous		 929L (74S Janet - 287s Hazelwood) Arctic Arrow requires a GOI on 929L to complete installation on interphase spacers in spans 117-120, 363, & 388-399. See also 290369 925L RB and 290370 932L RB that goes with this due to proximity  
ATCO 16-Dec-24 10:00 23-Dec-24 16:00 7.25 Days
Continuous		 7L40 (733s Simonette - 813s Little Smoky) Changing Poles and Cross Arms  
ALTALINK, EPCOR 18-Dec-24 08:00 18-Dec-24 17:30 9.5 Hours
Daily		 809L (320p Keephills - 510s Sunnybrook) Replace tight riser wire to 320p809X  
ALTALINK 18-Dec-24 23:00 19-Dec-24 03:00 4 Hours
Daily		 62s 11 (62s Brazeau Plant) maintenance  
ALTALINK 19-Dec-24 03:00 19-Dec-24 07:00 4 Hours
Daily		 62s 12 (62s Brazeau Plant) maintenance  
ATCO 06-Jan-25 08:00 13-Jan-25 16:00 7.33 Days
Continuous		 7L68 (730s Rycroft - 811s Clairmont Lake) Line to line and line to ground mitigation  
ATCO 06-Jan-25 10:00 13-Jan-25 16:00 7.25 Days
Continuous		 7L40 (733s Simonette - 813s Little Smoky) Changing rotten X Arms and rotten poles from Test and Treat  
ATCO 07-Jan-25 09:00 10-Jan-25 16:00 3.29 Days
Continuous		 801s 901T (801s Anderson), 801s 902 (801s Anderson), 801s 704 (801s Anderson) DFR Upgrade at Anderson.
Cutover and commission the following inputs to the new DFR: CT901-X, CT902-Y, and 704 status.
Relay settings updates: 87tb/901t and 51tv-59n-51n/901t and associated wiring modifications.
Scada configuration changes, including verification of alarms to local HMI and SOC.		  
ALTALINK 08-Jan-25 07:00 09-Jan-25 13:30 30.5 Hours
Daily		 892L (244s Bowmanton - 895s Suffield) Cutover, test LTO, CT circuits at 244s and 895s to new RAS209 relays. Trip test 895s892 from new ‘B’ Bus protection and Breaker Fail relay. New maintenance switch being installed for breaker 244s2952 and 244s3052.  
ATCO 11-Jan-25 09:00 12-Jan-25 17:00 1.33 Days
Continuous		 801s 705 (801s Anderson), 7L85 (801s Anderson - ATC 803s Bullpound) DFR Upgrade at Anderson.
Demo inputs from existing DSM: 705CT, 21A/7L85 and 21B/7L85 DSM trigger, 94-700BS1 trigger (requires blocking of 87BA/700BS1 during wire removal), and 700PT1Y1 input (requires blocking during wire removal).
7L85 relay setting updates.		  
EPCOR 13-Jan-25 07:00 17-Jan-25 17:00 4.42 Days
Continuous		 987s T2 (987s Clover Bar), 987s C2410 (987s Clover Bar), 987s C2406 (987s Clover Bar), 987s CC721 (987s Clover Bar) Cloverbar: TX2 VRR Cut Overs  
ALTALINK 13-Jan-25 07:00 17-Jan-25 17:00 4.42 Days
Continuous		 100L (498s Tilley - 895s Suffield) Replace 100L B protection at 895s and 498s  
ATCO 13-Jan-25 10:00 20-Jan-25 08:00 6.92 Days
Continuous		 7L32 (811s Clairmont Lake - 862s South Bezanson) Changing rotten X Arms and rotten poles from Test and Treat  
ALTALINK 13-Jan-25 12:00 17-Jan-25 18:00 4.25 Days
Continuous		 190L (17s Benalto - 320p Keephills) Component replacement on 190L (STR24-417)  
ATCO 14-Jan-25 10:00 14-Jan-25 17:00 7 Hours
Continuous		 801s 902 (801s Anderson) Final connection of Bkr 902/52a single pole status inputs to DFR, Commission  
ATCO 15-Jan-25 10:00 15-Jan-25 17:00 7 Hours
Continuous		 801S 903, 801s 903 (801s Anderson) Final connection of Bkr 903 52a single pole status inputs to DFR, Commission  
ATCO 16-Jan-25 10:00 16-Jan-25 17:00 7 Hours
Continuous		 801S 904, 801s 904 (801s Anderson) Final connection of Bkr 904 52a single pole status inputs to DFR, Commission  
ATCO 17-Jan-25 10:00 17-Jan-25 17:00 7 Hours
Continuous		 801s 905 (801s Anderson) Final connection of Bkr 905 52a single pole status inputs to DFR, Commission  
ATCO 18-Jan-25 10:00 18-Jan-25 17:00 7 Hours
Continuous		 801s 906 (801s Anderson) Final connection of Bkr 906 52a single pole status inputs to DFR, Commission  
ATCO 19-Jan-25 10:00 19-Jan-25 17:00 7 Hours
Continuous		 801s 907 (801s Anderson) Final connection of Bkr 907 52a single pole status inputs to DFR, Commission  
ATCO 20-Jan-25 08:00 27-Jan-25 16:00 7.33 Days
Continuous		 7L68 (730s Rycroft - 811s Clairmont Lake) Line to line and line to ground mitigation  
ATCO, ALTALINK 20-Jan-25 10:00 23-Jan-25 16:30 3.27 Days
Continuous		 7L129 (526s Buffalo Creek - 7LA129 tap) Replace structures, cross arms and insulators on 7L129  
ALTALINK 20-Jan-25 10:00 23-Jan-25 16:30 3.27 Days
Continuous		 526s 20 (526s Buffalo Creek) Replace structures, cross arms and insulators on 7L129  
ATCO 20-Jan-25 10:00 24-Jan-25 12:00 4.08 Days
Continuous		 741s 701T (741s Fox Creek), 741s 701 (741s ATC Fox Creek), 741s 702 (741s ATC Fox Creek), 741s 702T (741s Fox Creek), 741s 703 (741s ATC Fox Creek), 741s 704 (741s ATC Fox Creek), 741s 705C (741s Fox Creek), 741s 705 (741s ATC Fox Creek), 7L90 (741s ATC Fox Creek - 7LA90 tap), 7L199 (347s AML Fox Creek - 741s ATC Fox Creek) Install new 144kV PT to 144kV bus in a new location.  
ALTALINK 20-Jan-25 12:00 21-Jan-25 18:00 30 Hours
Continuous		 190L (17s Benalto - 320p Keephills) Component replacement on 190L (STR24-417)  
ATCO, ALTALINK 27-Jan-25 10:00 30-Jan-25 16:30 3.27 Days
Continuous		 7L129 (526s Buffalo Creek - 7LA129 tap) Replace structures, cross arms and insulators on 7L129  
ALTALINK 27-Jan-25 10:00 30-Jan-25 16:30 3.27 Days
Continuous		 526s 20 (526s Buffalo Creek) Replace structures, cross arms and insulators on 7L129  
ATCO 27-Jan-25 10:00 03-Feb-25 08:00 6.92 Days
Continuous		 7L32 (811s Clairmont Lake - 862s South Bezanson) Changing rotten X Arms and rotten poles from Test and Treat  
ALTALINK 27-Jan-25 12:00 31-Jan-25 18:00 4.25 Days
Continuous		 190L (17s Benalto - 320p Keephills) Component replacement on 190L (STR24-417)  
ATCO 28-Jan-25 10:00 28-Jan-25 17:00 7 Hours
Continuous		 801s 908 (801s Anderson) Final connection of Bkr 908 52a single pole status inputs to DFR, Commission  
ATCO 29-Jan-25 10:00 29-Jan-25 17:00 7 Hours
Continuous		 801s 909 (801s Anderson) Final connection of Bkr 909 52a single pole status inputs to DFR, Commission  
ATCO 30-Jan-25 10:00 30-Jan-25 17:00 7 Hours
Continuous		 801s 910 (801s Anderson) Final connection of Bkr 910 52a single pole status inputs to DFR, Commission  
ATCO 31-Jan-25 10:00 31-Jan-25 17:00 7 Hours
Continuous		 801s 911 (801s Anderson) Final connection of Bkr 911 52a single pole status inputs to DFR, Commission  
ATCO 01-Feb-25 10:00 01-Feb-25 17:00 7 Hours
Continuous		 801s 912 (801s Anderson) Final connection of Bkr 912 52a single pole status inputs to DFR, Commission  
ATCO 03-Feb-25 08:00 10-Feb-25 16:00 7.33 Days
Continuous		 7L68 (730s Rycroft - 811s Clairmont Lake) Line to line and line to ground mitigation  
ATCO 03-Feb-25 09:00 10-Feb-25 16:00 7.29 Days
Continuous		 9L10 (876s Brintnell - 939s Livock) Line to Ground Mitigation  
ALTALINK 03-Feb-25 12:00 06-Feb-25 18:00 3.25 Days
Continuous		 190L (17s Benalto - 320p Keephills) Component replacement on 190L (STR24-417)  
ATCO 10-Feb-25 08:00 13-Feb-25 17:00 3.38 Days
Continuous		 7L85 (803s ATC Bullpound - 7LA85 tap) Install interphase spacers  
ATCO 10-Feb-25 10:00 17-Feb-25 08:00 6.92 Days
Continuous		 7L32 (811s Clairmont Lake - 862s South Bezanson) Changing rotten X Arms and rotten poles from Test and Treat  
ALTALINK 10-Feb-25 12:00 14-Feb-25 18:00 4.25 Days
Continuous		 903L (17s Benalto - 320p Keephills) Structure replacement at 903L24  
ATCO 10-Feb-25 12:30 13-Feb-25 15:00 3.1 Days
Continuous		 7L85 (804s Wintering Hills - 7LA85 tap) Cross arm and insulator replacement on 7L85
insulator replacement on 7L85		  
ATCO 14-Feb-25 08:00 17-Feb-25 17:00 3.38 Days
Continuous		 7L85 (804s Wintering Hills - 7LA85 tap) Install interphase spacers  
ATCO 17-Feb-25 09:00 24-Feb-25 16:00 7.29 Days
Continuous		 9L10 (876s Brintnell - 939s Livock) Line to Ground Mitigation  
ATCO 17-Feb-25 12:01 03-Mar-25 12:00 14 Days
Continuous		 7L199 (347s AML Fox Creek - 741s ATC Fox Creek), 741s 702 (741s ATC Fox Creek) Fox Creek Substation Upgrade project. Demo old cables, install and terminate new cables, cut over to new protection.
  
ALTALINK 17-Feb-25 12:01 03-Mar-25 12:30 14.02 Days
Continuous		 199L (347s AML Fox Creek - 741s ATC Fox Creek) A741s work by ATCO  
ATCO 24-Feb-25 07:00 17-Mar-25 17:00 21.38 Days
Continuous		 730s 701T (730s Rycroft) install new relays, new 2z panel, end to end testing.  
ATCO 24-Feb-25 08:00 03-Mar-25 17:00 7.38 Days
Continuous		 7L85 (801s Anderson - ATC 803s Bullpound) Crossarm Replacements, install interphase spacers, clearance mitigation  
ENMAX, ALTALINK 24-Feb-25 08:00 14-Mar-25 16:00 18.29 Days
Continuous		 20.82L (SS-20 - SS-21), 21.80L (42s Sarcee - SS-21), 21.1TR (SS-21) HV SW Replacement 21SW81, 21SW82, 21SW83, 21MD138-21.1TR, 21.4TR (SS-21)  
ENMAX, ALTALINK 24-Feb-25 08:00 14-Mar-25 16:00 18.29 Days
Continuous		 21.80L (42s Sarcee - SS-21) HV SW Replacement 21SW81, 21SW82, 21SW83, 21MD138-21.1TR, 21.4TR (SS-21)  
BCH 24-Feb-25 09:00 28-Feb-25 17:00 4.33 Days
Continuous		 5L51 (BPA Custer - BCH Ingledow) ING 5CB3 Insp and doble AB-BC
ATCO 24-Feb-25 10:00 03-Mar-25 16:00 7.25 Days
Continuous		 7L32 (811s Clairmont Lake - 862s South Bezanson) Changing rotten X Arms and rotten poles from Test and Treat  
ATCO 03-Mar-25 09:00 10-Mar-25 16:00 7.25 Days
Continuous		 9L10 (876s Brintnell - 939s Livock) Line to Ground Mitigation  
ATCO 10-Mar-25 08:00 13-Mar-25 17:00 3.38 Days
Continuous		 7L28 (717s Ethel Lake - 846s Grand Centre) 7L28 Line to ground clearance mitigation  
ATCO 10-Mar-25 08:00 17-Mar-25 17:00 7.38 Days
Continuous		 7L85 (801s Anderson - ATC 803s Bullpound) Crossarm Replacements, install interphase spacers, clearance mitigation  
ATCO 10-Mar-25 10:00 17-Mar-25 16:00 7.25 Days
Continuous		 7L32 (811s Clairmont Lake - 862s South Bezanson) Changing rotten X Arms and rotten poles from Test and Treat  
ALTALINK 17-Mar-25 07:00 28-Mar-25 18:00 11.46 Days
Continuous		 610L (83s Taber - 336s Fincastle) VATD - Rebuild 610L. Cut over from Old 610L to New 610L.  
ENMAX, ALTALINK 17-Mar-25 08:00 27-Mar-25 16:00 10.33 Days
Continuous		 50L (44s Bearspaw Plant - SS-21) HV SW Replacement 21SW87, 21SW88, 21SW89, 21MD138-21.2TR  
ENMAX, ALTALINK 17-Mar-25 08:00 27-Mar-25 16:00 10.33 Days
Continuous		 50L (44s Bearspaw Plant - SS-21), 21.1C (SS-21), 21.2TR (SS-21) HV SW Replacement 21SW87, 21SW88, 21SW89, 21MD138-21.2TR  
ATCO 18-Mar-25 08:00 19-Mar-25 17:00 1.38 Days
Continuous		 7L53 (706s Irish Creek - 7LA53 tap), 7LA53 (969s Lindbergh - 7L53 tap), 7L53 (700s Bonnyville - 7LA53 tap) Cold Lake Area Project to connect 1064s  
ATCO 24-Mar-25 08:00 27-Mar-25 17:00 3.38 Days
Continuous		 7L91 (715s Leming Lake - 826s Marguerite Lake) Cold Lake Area Energy Centre Project
Cutover CT/PT/P&C ccts for new Thermal RAS relays
Complete commissioning 49A/49B/7L91 relays
End-to-end testing to 1064S		  
ATCO 24-Mar-25 08:00 31-Mar-25 17:00 7.38 Days
Continuous		 7L85 (801s Anderson - ATC 803s Bullpound) Crossarm Replacements, install interphase spacers, clearance mitigation  
ATCO, ALTALINK 24-Mar-25 10:00 27-Mar-25 16:30 3.27 Days
Continuous		 7L129 (526s Buffalo Creek - 7LA129 tap) Replace structures, cross arms and insulators on 7L129  
ATCO 24-Mar-25 10:00 31-Mar-25 16:00 7.25 Days
Continuous		 7L32 (811s Clairmont Lake - 862s South Bezanson) Changing rotten X Arms and rotten poles from Test and Treat  
ATCO 07-Apr-25 10:00 14-Apr-25 16:00 7.25 Days
Continuous		 7L32 (811s Clairmont Lake - 862s South Bezanson) Changing rotten X Arms and rotten poles from Test and Treat  
ATCO 21-Apr-25 08:00 24-Apr-25 17:00 3.38 Days
Continuous		 7L86 (822s Wolf Lake - 1200s Foster Creek) Cenovus is expanding their 1200S substation 26m to the south, toward structure 449.
We will be relocating the conductor north of structure 449 to the new A-Frame structure that Cenovus is installing inside their substation.		  
ATCO 22-Apr-25 10:00 28-Apr-25 16:00 6.25 Days
Continuous		 7L32 (811s Clairmont Lake - 862s South Bezanson) Changing rotten X Arms and rotten poles from Test and Treat  
ENMAX, ALTALINK 25-Apr-25 08:00 28-Apr-25 16:00 3.33 Days
Continuous		 20.82L (SS-20 - SS-21), 21.80L (42s Sarcee - SS-21), 21.1TR (SS-21), 50L (44s Bearspaw Plant - SS-21), 21.1C (SS-21), 21.2TR (SS-21) HV SW Replacement 21SW86. Full substation outage  
ALTALINK, ENMAX 25-Apr-25 08:00 28-Apr-25 16:00 3.33 Days
Continuous		 42s 22 (42s Sarcee), 21.80L (42s Sarcee - SS-21) HV SW Replacement 21SW86. Full substation outage  
ENMAX, ALTALINK 25-Apr-25 08:00 28-Apr-25 16:00 3.33 Days
Continuous		 50L (44s Bearspaw Plant - SS-21) HV SW Replacement 21SW86. Full substation outage  
SUNCOR 03-May-25 09:00 15-May-25 16:00 12.29 Days
Continuous		 29EDD-1 T2 (29EDD-1 Millennium) BP-29EDD-1 - TA - T2 OLTC Maintenance and Testing; 29EDD-1 T2 72LV Arrester replacement (CG)
300199837, 300203566		  
ATCO 05-May-25 09:00 06-May-25 15:00 30 Hours
Continuous		 755s 901 (755s Cordel) BREAKER 901 SF6 GL315 COMPLETE TESTING @ 755S Cordel  
ATCO 07-May-25 09:00 08-May-25 15:00 30 Hours
Continuous		 755s 902 (755s Cordel) BREAKER 902 SF6 GL315 COMPLETE TESTING @ 755S Cordel  
ATCO 20-May-25 08:00 27-May-25 17:00 7.38 Days
Continuous		 7L224 (650s Hansman Lake - 774s Monitor) Install interphase spacers on 7L224  
SUNCOR 06-Jun-25 00:00 22-Jun-25 00:00 16 Days
Continuous		 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) FB-Maintenance and Testing - 29PT-260, 29PL7-4, 29PT-241, 29PT-257, 29PS-243 (450236799, 450233735, 31773784, 450237159)  
ATCO 09-Jun-25 09:00 23-Jun-25 17:30 14.35 Days
Continuous		 2029S BUILDING VALVE HALL, 2029s 1205 (2029s Heathfield), 2029s 1206 (2029s Heathfield) Annual EATL outage at 2075s & 2029s.

2029s & 2075s AC & DC O&M.

USE 2-70215 FOR 13L50 GOI
USE 2-70216 FOR 2029s GOI
USE 2-70217 FOR 2075s GOI		  
ATCO 09-Jun-25 09:00 23-Jun-25 17:30 14.35 Days
Continuous		 2075S BUILDING VALVE HALL, 2075s 916 (2075s Newell), 2075s 917 (2075s Newell) Annual EATL outage at 2075s & 2029s.

2029s & 2075s AC & DC O&M.

USE 2-70215 FOR 13L50 GOI
USE 2-70216 FOR 2029s GOI
USE 2-70217 FOR 2075s GOI		  
ATCO 09-Jun-25 09:00 23-Jun-25 17:30 14.35 Days
Continuous		 13L50 (DC LINK), 13L50 (2029s Heathfield - 2075s Newell) Annual EATL outage at 2075s & 2029s.

2029s & 2075s AC & DC O&M.

USE 2-70215 FOR 13L50 GOI
USE 2-70216 FOR 2029s GOI
USE 2-70217 FOR 2075s GOI		  
ENMAX, ALTALINK 16-Jun-25 08:00 19-Jun-25 16:00 3.33 Days
Continuous		 28.80L (42s Sarcee - SS-28) HV SW Replacement. 28SW80  
ENMAX, ALTALINK 16-Jun-25 08:00 19-Jun-25 16:00 3.33 Days
Continuous		 28.80L (42s Sarcee - SS-28) HV SW Replacement 28SW80  
ENMAX, ALTALINK 27-Jun-25 08:00 03-Jul-25 16:00 6.33 Days
Continuous		 37.2TR (SS-37), 37.82L (74s Janet - SS-37) HV SW Replacement. 37SW84, 37SW85, 37SW86  
ENMAX, ALTALINK 27-Jun-25 08:00 03-Jul-25 16:00 6.33 Days
Continuous		 50L (44s Bearspaw Plant - SS-21) HV SW Replacement. 37SW84, 37SW85, 37SW86  
SUNCOR 01-Jul-25 00:00 18-Jul-25 00:00 17 Days
Continuous		 29PL7-3 (29EDD-65 - 29EDD-71), 29EDD-65 29PT-0236 (29EDD-65) FB-Maintenance and Testing - 29PT-250, 29PL7-3, 29PT-246, 29PT-236 (450237140, 450237180, 450237158)  
ATCO 03-Jul-25 08:00 05-Jul-25 17:00 2.38 Days
Continuous		 7L701 (757s Battle River - 7LA701 tap) Install interphase spacers  
ATCO, ALTALINK 06-Jul-25 08:00 08-Jul-25 17:00 2.38 Days
Continuous		 7L701D1 (7LA701 tap), 701L (223s Strome - 7LA701 tap) Install interphase spacers  
ATCO 05-Aug-25 08:00 07-Aug-25 16:30 2.35 Days
Continuous		 7L702 (137s Sedgewick - 757s Battle River) Interphase spacers and pole replacements  
ATCO 11-Aug-25 10:00 14-Aug-25 16:30 3.27 Days
Continuous		 7L702 (137s Sedgewick - 757s Battle River) Interphase spacers and pole replacements  
ATCO 18-Aug-25 10:00 21-Aug-25 16:30 3.27 Days
Continuous		 7L702 (137s Sedgewick - 757s Battle River) Interphase spacers and pole replacements  
ATCO, ALTALINK 18-Aug-25 10:00 27-Aug-25 17:00 9.29 Days
Continuous		 7L129 (526s Buffalo Creek - 7LA129 tap), 710s 704 (710s Vermilion) 7L129 - A and B line protection upgrade.  
ATCO, ALTALINK 29-Sep-25 09:00 03-Oct-25 17:00 4.33 Days
Continuous		 7L77 (395s North Holden - 709s Vegreville) Install interphase spacers  
ALTALINK 01-Oct-25 08:00 11-Nov-25 17:00 41.42 Days
Continuous		 102s SVC (102s Langdon), 102s T4 (102s Langdon) the controls change AB-BC
ATCO 14-Oct-25 08:00 21-Oct-25 17:00 7.38 Days
Continuous		 7L171 (802s Michichi Creek - 804s Wintering Hills) Install interphase spacers  
ATCO 03-Nov-25 12:00 09-Dec-25 17:00 36.21 Days
Continuous		 9L99 (801s Anderson - 807s Sheerness) Replace Breaker 901 @ 807S Sheerness, complete line 21A, 21B/9L99 protection upgrade and Commissioning  
ATCO 08-Dec-25 13:00 11-Dec-25 15:00 3.08 Days
Continuous		 7L89 (721s La Corey - 826s Marguerite Lake) Line to ground clearance mitigation spans 202-203; 209-210; 216-217-218; 217-218; 221-222-223-224; 255-256; 313-314-315  
ATCO 15-Dec-25 13:00 18-Dec-25 15:00 3.08 Days
Continuous		 7L89 (721s La Corey - 826s Marguerite Lake) Line to ground clearance mitigation spans 202-203; 209-210; 216-217-218; 217-218; 221-222-223-224; 255-256; 313-314-315  
ATCO 13-Apr-26 10:00 18-Apr-26 17:00 5.29 Days
Continuous		 7L22 (790s Poplar Hill - 7L88 tap) Cut open 7L22, connect new line section to new 2061S Dobbs
7L22/21B relay upgrades at 790S Poplar Hill and 811S Clairmont Lake
On completion energize new 2061S Dobbs substation		  
ATCO 03-May-26 10:00 04-May-26 17:00 31 Hours
Continuous		 7L22 (811s Clairmont Lake - 7L88 tap) 7L22/21B relay upgrade at 811S Clairmont Lake
Upon completion new 2061S Dobbs substation ready to energize		  
ATCO 08-Mar-27 10:00 17-Mar-27 17:00 9.25 Days
Continuous		 9L24 (946s Oakland - 959s Lanfine), 959s 906 (959s Lanfine), 959s 905 (959s Lanfine), 946s 902 (946s Oakland), 946s 903 (946s Oakland) Replace A/B protection relays at 959S Lanfine and 946S Oakland
Cut in and reroute 9L24
Connect new 9LA24 T-tap
Commission Telecom and Protection to new 1072S Rose Lynn substation		  

AB-BC, AB-SK & AB-MATL: refer to AESO web posting: http://itc.aeso.ca/itc/public/atc
Also,
AB-BC, AB-SK & AB-MATL: refer to ISO Rule 203.6: http://www.aeso.ca/rulesprocedures/18592.html

Prepared On: 2024-10-23   15:25:23


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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