Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2024-06-22

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
EPCOR 18-Jun-24 07:00 22-Jun-24 17:00 4.42 Days
Continuous
1098L (EP 805s Jasper - Poundmaker), EP 805s J2401 (EP 805s Jasper), EP 805s J2407 (EP 805s Jasper) JDS1 LCR  
ALTALINK 20-Jun-24 07:00 26-Jun-24 17:00 6.42 Days
Continuous
74s T2 (74s Janet) Upgrade Transformer Protection Relays,Upgrade Breaker Fail Relay for 74s77. Modify Existing CT connections.  
ATCO, ALTALINK 22-Jun-24 08:00 27-Jun-24 17:30 5.4 Days
Continuous
7L50 (757s Battle River - 491L tap), 7L50 (526s Buffalo Creek - 491L tap) AltaLink request for Advice for 252s Station (408L, 491L) GOI  
ALTALINK, ENMAX 23-Jun-24 07:00 23-Jun-24 12:00 5 Hours
Daily
74s 24.83X (74s Janet), 24.83L (74s Janet - SS-24) Trip Testing 74s24.83X from new 74s77 Breaker Fail Relay  
ENMAX, ALTALINK 23-Jun-24 07:00 23-Jun-24 12:00 5 Hours
Continuous
24.83L (74s Janet - SS-24) Altalink outage. Trip Testing 74s24.83X from new 74s77 Breaker Fail Relay. Enmax to block reclosing on 24.83L  
ALTALINK 23-Jun-24 10:00 26-Jun-24 17:00 3.29 Days
Continuous
725L (674s Bowron - 725BL tap), 725L (15s Fort MacLeod - 725BL tap), 725BL (240s McBride Lake - 725L tap) Replace crossarms and insulators with line post insulators at structures 2, 162, 163 233 & 234. Replace H-Frame double dead-end crossarm and insulators at structure 147. Replace arms and insulators at structures 231, 232 & 262. Install ground rod and repair downlead at structure 223.  
ALTALINK 23-Jun-24 10:00 26-Jun-24 17:00 3.29 Days
Continuous
725BL (240s McBride Lake - 725L tap), 725BL54 (725BL tap) maintenance on the 300L  
ALTALINK, ENMAX 23-Jun-24 12:00 23-Jun-24 17:00 5 Hours
Daily
74s 23.80W (74s Janet), 23.80L (74s Janet - SS-23) Trip Testing 74s24.80 from new 74s77 Breaker Fail Relay  
ENMAX 23-Jun-24 12:00 23-Jun-24 17:00 5 Hours
Continuous
23.80L (74s Janet - SS-23) Altalink outage. Trip Testing 74s23.80 from new 74s77 Breaker Fail Relay. Enmax to block reclosing on 23.80L  
EPCOR 24-Jun-24 07:00 24-Jun-24 17:00 10 Hours
Continuous
EP 805s J2408 (EP 805s Jasper) Jasper: J2408 Pole Density Switch Repair  
EPCOR 24-Jun-24 07:00 29-Jun-24 17:00 5.42 Days
Continuous
T1 (EP Riverview), RW2405 (EP Riverview), RW2401 (EP Riverview) Riverview: TX1 Doble and RWAB1, RWDS1, RWDS10 Disconnect Maintenance  
ATCO 24-Jun-24 08:00 28-Jun-24 16:00 4.33 Days
Continuous
2075s 902T (2075s Newell) ANNUAL SVC MAINTENANCE @ NEWELL 2075S SVC 2  
ALTALINK 24-Jun-24 09:30 24-Jun-24 17:00 7.5 Hours
Daily
74s C3 (74s Janet), 74s C4 (74s Janet), 74s 104 (74s Janet) Trip Testing from new T2 Protections, Breaker Fail Initiate from T2 Protections, Block Close Testing from T2, & Protections Trip Testing from new 74s77 Breaker Fail Relay  
ATCO 24-Jun-24 09:30 28-Jun-24 17:30 4.33 Days
Continuous
12L85 (12s Heartland - 2029s Heathfield) PRC-005 - TRIP COIL TESTING - BREAKER 1207 @ 2029S
PRC-005 - TRIP COIL TESTING - BREAKER 1208 @ 2029S
PRC-005 - PROTECTION TESTING - MULTIPLE DEVICES RELATED TO 12L85 AND BREAKERS 1207 & 1208
 
ATCO 24-Jun-24 09:30 28-Jun-24 17:30 4.33 Days
Continuous
834s 901T (834s Wesley Creek), 834s 901 (834s Wesley Creek), 834s 904 (834s Wesley Creek) PRC-005 - SPR TESTING - TRANSFORMER 901T @ 834S
TRANSFORMER CLASS1 MAJOR TESTING - 901T @ 834S
RTXP Test Switch Mitigation and Replacement: 87TA/901T @ 834S
RTXP Test Switch Mitigation and Replacement: 87TB/901T @ 834S
Repair AUX Contacts on 901TD
Reduce isolation on Jun 24 to 901TD EOD
 
ALTALINK 24-Jun-24 10:00 24-Jun-24 12:00 2 Hours
Daily
74s 352 (74s Janet) Trip Testing from new T2 Protections,Breaker Fail Initiate from T2 Protections,Block Close Testing from T2 Protections, & Trip Testing from new 74s77 Breaker Fail Relay  
ATCO 24-Jun-24 10:00 27-Jun-24 16:00 3.25 Days
Continuous
7L50 (757s Battle River - 491L tap) 7L50 Pole and arm replacement  
ALTALINK 24-Jun-24 12:30 28-Jun-24 12:30 4 Days
Continuous
650s SVC (650s Hansman Lake) SVC resistor replacement, maintenance  
ALTALINK 24-Jun-24 13:30 26-Jun-24 17:30 2.17 Days
Continuous
410s T1 (410s Josephburg) Rad leaks, doble and LR/SFRA testing  
EPCOR 24-Jun-24 17:00 26-Jul-24 17:00 32 Days
Continuous
816s P2406 (816s Petrolia) Petrolia: P2406 Breaker LCR  
ALTALINK 25-Jun-24 07:00 25-Jun-24 12:00 5 Hours
Daily
74s 2252 (74s Janet) Trip Testing from new T2 Protections,Breaker Fail Initiate from T2 Protections,Block Close Testing from T2 Protections, & Trip Testing from new 74s77 Breaker Fail Relay  
ALTALINK 25-Jun-24 12:00 25-Jun-24 17:00 5 Hours
Daily
74s 2352 (74s Janet) Trip Testing from new T2 Protections,Breaker Fail Initiate from T2 Protections,Block Close Testing from T2 Protections, & Trip Testing from new 74s77 Breaker Fail Relay  
ALTALINK 26-Jun-24 07:00 26-Jun-24 12:00 5 Hours
Daily
74s 2852 (74s Janet) Trip Testing from new T2 Protections,Breaker Fail Initiate from T2 Protections,Block Close Testing from T2 Protections, & Trip Testing from new 74s77 Breaker Fail Relay  
ATCO 26-Jun-24 09:30 27-Jun-24 17:30 1.33 Days
Continuous
811s 707 (811s Clairmont Lake) BREAKER 707 MIN OIL HLR PARTIAL TESTING at 811s Clairmont  
ATCO 26-Jun-24 10:00 26-Jun-24 12:00 2 Hours
Continuous
957s 901 (957s McClelland) prc-005 trip coil testing,  
ATCO 26-Jun-24 12:00 26-Jun-24 14:00 2 Hours
Continuous
957s 902 (957s McClelland) prc-005 trip coil testing,  
ALTALINK 26-Jun-24 12:00 26-Jun-24 17:00 5 Hours
Daily
74s 3852 (74s Janet) Trip Testing from new T2 Protections,Breaker Fail Initiate from T2 Protections,Block Close Testing from T2 Protections, & Trip Testing from new 74s77 Breaker Fail Relay  
ATCO 26-Jun-24 14:00 26-Jun-24 16:00 2 Hours
Continuous
957s 903 (957s McClelland) prc-005 trip coil testing,  
ALTALINK 27-Jun-24 09:00 27-Jun-24 17:00 8 Hours
Continuous
108s T2 (108s Amelia), 108s 452 (108s Amelia), 108s 352 (108s Amelia) VT4 Sample oil, test CVT and lower oil in CVT head.  
ALTALINK 28-Jun-24 08:00 28-Jun-24 17:00 9 Hours
Daily
786L (799s Coleman - BCH Natal) Repair woodpecker damage on structures 97 & 109 Hardware tighten structure 108. AB-BC
BCH 28-Jun-24 09:00 28-Jun-24 18:00 9 Hours
Continuous
1L275 (799s Coleman - BCH Natal) coordinated outage 786L/1L275 AB-BC
ATCO 29-Jun-24 08:00 01-Jul-24 17:00 2.38 Days
Continuous
9L912 (63s Red Deer - 766s Nevis) Repair switch 9L912D1  
ALTALINK 29-Jun-24 08:00 01-Jul-24 17:00 2.38 Days
Continuous
912L (63s Red Deer - 766s Nevis) Repair switch 9L912D1  
EPCOR 02-Jul-24 07:00 02-Jul-24 17:00 10 Hours
Continuous
EP 803s T2 (EP 803s Lambton) Lambton: Yard light repair  
ALTALINK 02-Jul-24 07:00 05-Jul-24 18:00 3.46 Days
Continuous
701L (223s Strome - 7LA701 tap) 701L CRU & WMP Component Replacement (STR 423 - 449)  
ATCO 02-Jul-24 07:00 05-Jul-24 18:00 3.46 Days
Continuous
7L701 (757s Battle River - 7LA701 tap) AltaLink Scope: 701L CRU & WMP Component Replacement (STR 423 - 449)  
Syncrude 02-Jul-24 08:00 15-Jul-24 16:00 13.33 Days
Continuous
Syncrude Plant 30-2 30-2PTR72-A1 (UE-1 Syncrude Plant 30-2), UE-1 1501 (UE-1 Syncrude Plant 30-2), UE-1 72-02 (UE-1 Syncrude Plant 30-2), UE-1 7202 (UE-1 Syncrude Plant 30-2) SCL - Require 72kV transformer outage to investigate junction box on top of transformer and replace with through cable. We have had transformers trip in the past from moisture ingress and do not want this to happen on this one.  
ALTALINK 02-Jul-24 14:00 11-Jul-24 17:30 9.15 Days
Continuous
214s T2 (214s Innisfail) 214sT2 oil reclaim  
ATCO, AIRLIQUIDE 03-Jul-24 09:00 03-Jul-24 16:00 7 Hours
Continuous
ALC03L (402s Scotford Expansion One - 408s Air Liquide Scotford) clean contaminated insulators structures 8-15  
ATCO 03-Jul-24 10:00 10-Jul-24 15:00 7.21 Days
Continuous
774s 701 (774s Monitor) Modifications to panel 1G including relocation of breaker 701 control switches and 7L224 ION meter in preparation for addition of RAS enable / disable control.  
ALTALINK 03-Jul-24 12:00 03-Jul-24 17:00 5 Hours
Continuous
892L (244s Bowmanton - 895s Suffield) URGENT 895s48 LA Replacement due to hotspot.  
ALTALINK 04-Jul-24 07:30 04-Jul-24 16:30 9 Hours
Daily
510s 3752 (510s Sunnybrook) Replace Breaker HV Capacitor  
ALTALINK 06-Jul-24 07:00 06-Jul-24 18:00 11 Hours
Daily
409s 110 (409s Shell Scotford) Installation of new 138KV Bus B protection requiring CT contributions from 409s110. Trip testing to 409s110. Add 43M/1052. RSLD 3 to be implemented after outage is complete.  
SUNCOR 06-Jul-24 08:00 18-Jul-24 18:00 12.42 Days
Continuous
29EDD-65 29-952-4813 (29EDD-65), 29EDD-65 29-952-4823 (29EDD-65), 29EDD-65 260kV Bus 29PP-0049 (29EDD-65) FB-29-952-4813, 4823 5y PM 29PP-49 SYSTEM;PM 5y (46555392, 46555395, 450237141)  
ALTALINK, Lethbridge 06-Jul-24 22:00 07-Jul-24 07:00 9 Hours
Continuous
207L (111s Coalbanks - 370s North Lethbridge), 725LE (111s Coalbanks - 725AL tap), 725LE (674s Bowron - 725AL tap) 111S Station Outage Required to Inspect, Clean/Lube & Operate 138KV Breakers & Airbreak Switches.  
ALTALINK 06-Jul-24 22:00 07-Jul-24 07:00 9 Hours
Continuous
725AL (618s Riverbend - 725L tap), 725L (111s Coalbanks - 725AL tap), 725L (674s Bowron - 725AL tap) 111S Station Outage Required to Inspect, Clean/Lube & Operate 138KV Breakers & Airbreak Switches.  
ALTALINK, Lethbridge 06-Jul-24 22:00 07-Jul-24 07:00 9 Hours
Continuous
207L (111s Coalbanks - 370s North Lethbridge) 111S Station Outage Required to Inspect, Clean/Lube & Operate 138KV Breakers & Airbreak Switches.  
ALTALINK, EPCOR 08-Jul-24 07:00 31-Jul-24 17:00 23.42 Days
Continuous
1058L (657s Summerside - EP 803s Lambton), EP 803s L2404 (EP 803s Lambton), EP 803s L2403 (EP 803s Lambton) Lambton 1058L: Steel Structure Refurbishment  
ALTALINK 08-Jul-24 08:00 11-Jul-24 17:00 3.38 Days
Continuous
1042L (485s Blackspring Ridge - 554s Travers) Substation 5 year major BOP maintenance scope.  
ATCO 08-Jul-24 08:00 15-Jul-24 16:00 7.33 Days
Continuous
7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
ATCO 08-Jul-24 09:00 09-Jul-24 17:00 1.33 Days
Continuous
849s 902 (849s Joslyn Creek) breaker maintenance  
ALTALINK 08-Jul-24 09:00 10-Jul-24 18:00 2.38 Days
Continuous
326s 240kV Bus 2 (326s Murray lake) Install 240kV SS1 station service transformer and transfer switch on 240kV Bus 2  
ATCO 08-Jul-24 09:00 11-Jul-24 16:00 3.29 Days
Continuous
809s 902T (809s Louise Creek) transformer maintenance  
ATCO 08-Jul-24 09:00 11-Jul-24 16:00 3.29 Days
Continuous
809s 910 (809s Louise Creek) breaker maintenance  
BCH 08-Jul-24 09:00 12-Jul-24 17:00 4.33 Days
Continuous
2L294 (BCH A. A. Lambert - BCH Cranbrook) replace end of life structure. BC maintenance does not affect the Alberta ATC AB-BC
ATCO 08-Jul-24 09:30 10-Jul-24 10:00 2.02 Days
Continuous
834s 902T (834s Wesley Creek), 834s 702 (834s Wesley Creek), 834s 703 (834s Wesley Creek), 834s 902 (834s Wesley Creek), 834s 903 (834s Wesley Creek) Test and Repair 902TD and 702TD at 834s Wesley Creek
TCM Program. RTXP Test Switch Mitigation and Replacement: 87TA/902T @ 834S
TCM Program. RTXP Test Switch Mitigation and Replacement: 87TB/902T @ 834S
Release this permit and proceed to 2-82787
 
ALTALINK 08-Jul-24 14:30 09-Jul-24 17:30 27 Hours
Continuous
59s 752 (59s Peigan) 59s752 First Trip and Maint. replace densimeter.  
ALTALINK 09-Jul-24 07:30 10-Jul-24 15:30 1.33 Days
Continuous
AML 511s ACF11 (AML 511s Crossings) Install bird mitigation in ACF11 reactor housing  
SUNCOR 09-Jul-24 08:00 16-Jul-24 16:00 7.33 Days
Continuous
29EDD-94 29PS-393 (29EDD-94 Voyageur) BP - 29EDD-94, 29PS-393 Control Fail Alarm
 
SUNCOR 09-Jul-24 08:00 21-Jul-24 16:00 12.33 Days
Continuous
29PL6-22 (29EDD-1 Millennium - 29EDD-2 Tar Island), 29EDD-2 29PT-3 (29EDD-2 Tar Island), 29EDD-1 29EDD1s1352 (29EDD-1 Millennium), 29EDD-1 29EDD1S1452 (29EDD-1 Millennium) BP - 29EDD1;29CVT-7 SYSTEM;PM 5y,10y;bus; test breaker 29EDD1S1352
 
ALTALINK 09-Jul-24 08:30 10-Jul-24 17:00 1.35 Days
Continuous
562s 152 (562s Cypress) Breaker trouble (voltage relay), first trip, PRC 5  
ALTALINK 09-Jul-24 10:00 09-Jul-24 15:00 5 Hours
Daily
853L (28s West Brooks - 853AL tap) Commission 853L LTO to new AIS relays and install new 43Ms on 28s25 and 28s28  
ALTALINK, Lethbridge 10-Jul-24 07:30 10-Jul-24 18:00 10.5 Hours
Daily
172L (181s Chinook - 370s North Lethbridge) Test LTO to new AIS relay.  
ALTALINK 10-Jul-24 07:30 11-Jul-24 14:30 31 Hours
Continuous
510s ACF11 (510s Sunnybrook), 510s ACF12 (510s Sunnybrook), 510s ACF13 (510s Sunnybrook), 510s ACF14 (510s Sunnybrook), 510s ACF14 - Spare (510s Sunnybrook) Multiply Outdoor Grounding Switch Maintenances (510s1157, 510s1257, 510s1357, 510s1457)  
ALTALINK 10-Jul-24 08:00 12-Jul-24 16:00 2.33 Days
Continuous
786L (799s Coleman - BCH Natal) We need to move this fiber run to accommodate construction for a wildlife underpass. We will have all infrastructure installed before we cut the existing line and reroute it to our new locations. AB-BC
ALTALINK 10-Jul-24 08:30 11-Jul-24 15:30 31 Hours
Continuous
59s 952 (59s Peigan) 59s952 First Trip and Maint. replace densimeter.  
ATCO 10-Jul-24 09:00 11-Jul-24 17:00 1.33 Days
Continuous
849s 903 (849s Joslyn Creek) breaker maintenance  
ATCO 10-Jul-24 09:30 12-Jul-24 17:30 2.33 Days
Continuous
834s 902T (834s Wesley Creek) PRC-005 - SPR TESTING - TRANSFORMER 902T @ 834S
902T TRANSFORMER CLASS1 MAJOR TESTING @ 834s Wesley Creek
Reduction from 2-82877 just just include 902T and restore both 240kV/144kV buses
 
CNRL, ATCO 10-Jul-24 11:00 10-Jul-24 13:00 2 Hours
Continuous
859s 52G (859s Primrose), 859s 501TD (859s Primrose) Transfer all load from 25kV Bus B to 25kV Bus A. Note 501TD is a 25kV switch not 144kV.  
ATCO 10-Jul-24 16:31 11-Jul-24 16:00 23.48 Hours
Continuous
7L749 (899s Edgerton - 7LB749 tap) Climbing Inspection 7L749 Between 7L749D3 (7LB749 tap) and Alta Link Tie  
ALTALINK 10-Jul-24 16:31 11-Jul-24 16:00 23.48 Hours
Continuous
749L (899s Edgerton - 7LB749 tap) Climbing Inspection 7L749 Between 7L749D3 (7LB749 tap) and AltaLink Tie  
EPCOR 15-Jul-24 07:00 19-Jul-24 17:00 4.42 Days
Continuous
805s T1 (805s Jasper), EP 805s J2401 (EP 805s Jasper) Jasper: JDS2 LCR  
Lethbridge 15-Jul-24 08:00 15-Jul-24 17:00 9 Hours
Continuous
181s 463L (181s Chinook) Replace faulty tank heaters on 181S463L Breaker  
ALTALINK 15-Jul-24 08:00 19-Jul-24 15:00 4.29 Days
Continuous
102s SVC (102s Langdon) Maintenance/ Inspection of SVC Components.  
ENMAXEC 15-Jul-24 08:00 19-Jul-24 18:00 4.42 Days
Continuous
383s T1 (383s Kettles Hill Windfarm), 383s T2 (383s Kettles Hill Windfarm) substation maintenance  
SUNCOR 15-Jul-24 08:00 21-Jul-24 16:00 6.33 Days
Continuous
29EDD-1 29EDD1s1252 (29EDD-1 Millennium) BP - 29EDD1;29CVT-2 SYSTEM;PM 5y,10y; 29EDD1S252 Breaker
 
ATCO 15-Jul-24 08:30 19-Jul-24 16:00 4.31 Days
Continuous
2029s ACF11 (2029s Heathfield), 2029s ACF12 (2029s Heathfield), 2029s ACF13 (2029s Heathfield), 2029s ACF14 (2029s Heathfield) FILTER BANK AC MAINTENANCE  
ALTALINK 15-Jul-24 09:00 16-Jul-24 09:00 24 Hours
Continuous
616L (103s Goose Lake - 616AL tap), 616L (59s Peigan - 616AL tap) 4 yr maintenance & testing on substation isolation switch 89-S1  
ATCO 15-Jul-24 09:00 16-Jul-24 17:00 1.33 Days
Continuous
849s 906 (849s Joslyn Creek) breaker maintenance  
ALTALINK 15-Jul-24 10:00 22-Jul-24 14:00 7.17 Days
Continuous
138s T1 (138s Windy Flats) Transformer internal inspection and repair from Siemens 138s T1 Tx18979  
ATCO 15-Jul-24 11:00 18-Jul-24 15:00 3.17 Days
Continuous
7L85 (801s Anderson - ATC 803s Bullpound) Cross arm and insulator replacement on 7L85  
ALTALINK 15-Jul-24 11:30 19-Jul-24 17:00 4.23 Days
Continuous
42s T2 (42s Sarcee) 42sT2 Maint. and leak repair  
ALTALINK 16-Jul-24 06:00 16-Jul-24 20:00 14 Hours
Continuous
1148L (251s Whitla - 1018s Shamrock) Annual Substation Maintenance Outage  
ALTALINK 16-Jul-24 08:00 29-Jul-24 17:00 13.38 Days
Continuous
463L (15s Fort Macleod - 463AL tap) Crossarm & Insulator replacement 79-127 as well as minor conductor/downlead repairs 123 - 224  
ALTALINK 16-Jul-24 08:30 17-Jul-24 17:30 1.38 Days
Continuous
723s 252 (723s Christina Lake), 723s T2 (723s Christina Lake) 240kV Breaker maintenance, dashpot repair  
ATCO 16-Jul-24 08:30 18-Jul-24 17:30 2.38 Days
Continuous
700s 701 (700s Bonnyville), 7L70 (700s Bonnyville - 707s St. Paul) 701 Partial Breaker testing.  
ATCO 16-Jul-24 09:30 17-Jul-24 17:30 1.33 Days
Continuous
834s 901 (834s Wesley Creek) PRC-005 - TRIP COIL TESTING
RTXP Test Switch Mitigation and Replacement: 50BF/901 @ 834S
 
ATCO 16-Jul-24 10:00 17-Jul-24 16:00 30 Hours
Continuous
827s SVC (827s Cranberry Lake), 827s 703T (827s Cranberry Lake), 827s 703 (827s Cranberry Lake) SVC Maintenance  
ALTALINK 17-Jul-24 07:30 19-Jul-24 14:00 2.27 Days
Continuous
15s 138kV Bus1 (15s Fort Macleod), 463L (15s Fort Macleod - 463AL tap), 180L (15s Fort Macleod - 180AL tap), 15s T1 (15s Fort Macleod) Install and commission new T1 protections, 15s22 control, VT1 distribution and trip testing  
ATCO 17-Jul-24 09:00 18-Jul-24 17:00 1.33 Days
Continuous
849s 907 (849s Joslyn Creek) breaker maintenance  
ALTALINK 17-Jul-24 10:00 17-Jul-24 14:00 4 Hours
Daily
250p 11 (250p Bighorn Plant) maintenance  
ALTALINK 18-Jul-24 08:00 18-Jul-24 12:30 4.5 Hours
Daily
17s 11 (17s Benalto) 240kV breaker maintenance  
ALTALINK 18-Jul-24 08:30 18-Jul-24 17:30 9 Hours
Daily
723s 252 (723s Christina Lake) 240kV Breaker Maintenance  
ATCO 18-Jul-24 09:30 19-Jul-24 17:30 1.33 Days
Continuous
834s 902 (834s Wesley Creek) PRC-005 - TRIP COIL TESTING
RTXP Test Switch Mitigation and Replacement: 50BF/902 @ 834S
 
ALTALINK 18-Jul-24 10:00 18-Jul-24 14:00 4 Hours
Daily
250p 22 (250p Bighorn Plant) maintenance  
SUNCOR 19-Jul-24 08:00 30-Jul-24 18:00 11.42 Days
Continuous
29EDD-65 260kV Bus 29PP-0048 (29EDD-65), 29EDD-65 29-952-4811 (29EDD-65), 29EDD-65 29-952-4821 (29EDD-65) FB-29-952-4811, 4821 5y PM 29PP-48 SYSTEM;PM 5y (46555392, 46555395, 450237141)  
ENMAX, ALTALINK 21-Jul-24 08:00 21-Jul-24 18:00 10 Hours
Continuous
24.81L (SS-24 - SS-31), 24.83L (74s Janet - SS-24), 24.1TR (SS-24), 24B138-24BT3 (SS-24) Power Factor Test - 24B138-24.83-CT, 24PT138-Z31  
ENMAX, ALTALINK 21-Jul-24 08:00 21-Jul-24 18:00 10 Hours
Daily
24.83L (74s Janet - SS-24) Power Factor Test - 24B138-24.83-CT, 24PT138-Z31.  
SUNCOR 21-Jul-24 08:00 08-Aug-24 18:00 18.42 Days
Continuous
29PL9-24 (29EDD-94 Voyageur - 29EDD-60 Inglis Island) BP-29PL9-24 OPGW Installation between STR 1-4
Removal of Temporary Patching of OPGW from 29PL9-25 @ Cogen and Voyageur
Splicing OPGW @ STR 1, 4 and HFG 1
A&B Protection Outage (PD)
 
ALTALINK 22-Jul-24 07:00 25-Jul-24 18:00 3.46 Days
Continuous
172L (254s Coaldale - 370s North Lethbridge) Updating and testing new line protection settings and RAS Relays for the new RAS 219  
ATCO 22-Jul-24 08:00 25-Jul-24 16:00 3.33 Days
Continuous
7L228 (845s Big Mountain - 7L20 tap) Changing rotten cross arm and poles  
ATCO 22-Jul-24 08:00 03-Aug-24 17:00 12.38 Days
Continuous
788s 703 (788s Hotchkiss), 7L63 (788s Hotchkiss - 7LA63 tap) 703 breaker replacement  
ATCO 22-Jul-24 09:00 26-Jul-24 17:00 4.33 Days
Continuous
849s 901T (849s Joslyn Creek) transformer maintenance, will require load transfer of 5L593 feeder to adjacent sub  
ATCO 22-Jul-24 09:00 26-Jul-24 17:30 4.35 Days
Continuous
834s 708 (834s Wesley Creek), 834s 710 (834s Wesley Creek), 7L131 (834s Wesley Creek - 905s Meikle) 834S 708 Densimters replacement
Repair 708B Gang Switch at 834s Wesley Creek
834S Wesley Creek BREAKER 708 SF6 HPL PARTIAL TESTING
BREAKER SF6 HPL COMPLETE TESTING - 708 @ 834S
TCM Program. RTXP Test Switch Mitigation and Replacement: 50BF/708 @ 834S

Reduce GOI to: 708A & 708B on July 24th at 17:30
 
ATCO 22-Jul-24 09:30 26-Jul-24 17:30 4.33 Days
Continuous
813s 902T (813s Little Smoky) TRANSFORMER CLASS1 TAP CHANGER - 902T @ 813S
TRANSFORMER 902T CLASS1 MAJOR TESTING
 
ATCO 22-Jul-24 11:00 25-Jul-24 15:00 3.17 Days
Continuous
7L85 (801s Anderson - ATC 803s Bullpound) Cross arm and insulator replacement on 7L85  
ALTALINK, EPCOR 23-Jul-24 07:00 24-Jul-24 17:00 1.42 Days
Continuous
908L (89s Ellerslie - 816s Petrolia), 816s PDS13 (816s Petrolia), 816s P2401 (816s Petrolia), 816s P2406 (816s Petrolia) Petrolia: P2406 Breaker LCR Commissioning (PDS13 Op Checks)  
SUNCOR 23-Jul-24 08:00 23-Jul-24 20:00 12 Hours
Continuous
29EDD-34 29PT-341 (29EDD-34) BP-Modification on the wiring for the NGR, JB Butt splice (CG)  
SUNCOR 23-Jul-24 08:00 27-Jul-24 18:00 4.42 Days
Continuous
29PL9-25 (29EDD-94 Voyageur - 29EDD-61 Stony Island) BP-29PL9-24 OPGW Installation between STR 1-4, outage is required due to close proximity to line 24(in LOA).
Removal of Temporary Patching of OPGW from 29PL9-25 @ Cogen and Voyageur
A&B Protection Outage (PD)
 
ATCO 23-Jul-24 09:00 23-Jul-24 11:00 2 Hours
Continuous
7L68 (730s Rycroft - 811s Clairmont Lake) HIGH LOAD UNDER LINE AT 7L68-416  
ATCO 23-Jul-24 13:00 23-Jul-24 15:00 2 Hours
Continuous
7L73 (730s Rycroft - 829s Boucher Creek) HIGH LOAD UNDER LINE AT 7L73-348  
ALTALINK, EPCOR 25-Jul-24 07:00 26-Jul-24 17:00 1.42 Days
Continuous
1044L (EP 805s Jasper - 816s Petrolia), 816s P2405 (816s Petrolia), 816s P2406 (816s Petrolia), 816s PDS14 (816s Petrolia) Petrolia: P2406 Breaker LCR Commissioning (PDS14 Op Checks)  
SUNCOR 25-Jul-24 08:00 25-Jul-24 20:00 12 Hours
Continuous
29EDD-34 29PT-340 (29EDD-34) BP-Modification on the wiring for the NGR, JB Butt splice (CG)  
EPCOR 29-Jul-24 07:00 02-Aug-24 17:00 4.42 Days
Continuous
330p 1201 (330p Genesee), 330p 1204 (330p Genesee), 330p 1207 (330p Genesee), 330P 12TC1 (330p Genesee), 330p 805 (330p Genesee) Genesee: BUS 1 CVT Doble and 1201A, 1204A, 1207A Disconnect Maintenance  
EPCOR 29-Jul-24 07:00 30-Aug-24 17:00 32.42 Days
Continuous
816s P2404 (816s Petrolia) Petrolia: P2404 Breaker LCR  
ATCO 29-Jul-24 08:00 01-Aug-24 16:00 3.33 Days
Continuous
7L228 (845s Big Mountain - 7L20 tap) Changing rotten cross arm and poles  
SUNCOR 29-Jul-24 08:00 12-Aug-24 16:00 14.33 Days
Continuous
29EDD-94 29PS-392 (29EDD-94 Voyageur), 29EDD-94 29PS-393 (29EDD-94 Voyageur), 29EDD-94 407T (29EDD-94 Voyageur), 29EDD-94 29-952-9705 (29EDD-94 Voyageur), 29EDD-94 29-952-9704 (29EDD-94 Voyageur) BP-BPC-24-052 - 29PP-83 & 29PT-410; 5 Year PM
29PS-392 Bad contactor coil
29PT-407 - Replace AVR (CG)
 
ATCO 29-Jul-24 08:30 02-Aug-24 16:00 4.31 Days
Continuous
2029s ACF21 (2029s Heathfield), 2029s ACF22 (2029s Heathfield), 2029s ACF23 (2029s Heathfield) FILTER BANK AC MAINTENANCE @ HEATHFIELD 2029S ACF21, ACF22, ACF23  
ATCO 29-Jul-24 09:00 01-Aug-24 17:30 3.35 Days
Continuous
801s 901T (801s Anderson), 801s Protection & Control (801s Anderson) 901T Major testing
tap changer maintenance.
PRC-005 testing
901T ETM/ITM setting update/wiring
 
ATCO 29-Jul-24 09:00 02-Aug-24 17:00 4.33 Days
Continuous
2015s 901T (2015s Yeo) transformer maintenance,  
ATCO 29-Jul-24 09:00 09-Aug-24 17:30 11.35 Days
Continuous
932s 901T (932s Pemukan), 932s Protection & Control (932s Pemukan) 901T Major testing
tap changer maintenance.
PRC-005 SPR testing
 
ATCO 29-Jul-24 09:30 30-Jul-24 17:30 1.33 Days
Continuous
813s 901 (813s Little Smoky) BREAKER SF6 HGF COMPLETE TESTING 901  
ATCO 29-Jul-24 12:30 01-Aug-24 15:00 3.1 Days
Continuous
7L85 (801s Anderson - ATC 803s Bullpound) Cross arm and insulator replacement on 7L85
Clearance Mitigation Structures 490 & 532
 
ALTALINK 29-Jul-24 13:00 01-Aug-24 17:30 3.19 Days
Continuous
289s T2 (289s Saunders Lake) Doble, Maintenance, IDD monitor  
ALTALINK 29-Jul-24 14:30 30-Jul-24 17:00 26.5 Hours
Continuous
59s 1152 (59s Peigan), 1049L (59s Peigan - 138s Windy Flats) 59s1152 first trip and gas density gauge.  
ALTALINK, TRANSALTA 31-Jul-24 09:00 01-Aug-24 16:00 31 Hours
Continuous
59s T1 (59s Peigan), 616L (59s Peigan - 616AL tap) 59sT1 Cycling alarm DC ground repair.  
ATCO 31-Jul-24 09:30 01-Aug-24 17:30 1.33 Days
Continuous
813s 904 (813s Little Smoky) BREAKER SF6 HGF COMPLETE TESTING 904  
ALTALINK 31-Jul-24 13:30 01-Aug-24 17:00 27.5 Hours
Daily
205s 352 (205s Castle Rock Ridge) 205s352 HPL maint. First trip Thermostat replacement.  
ALTALINK 31-Jul-24 23:00 01-Aug-24 03:00 4 Hours
Daily
62s 11 (62s Brazeau Plant) maintenance  
ALTALINK 01-Aug-24 03:00 01-Aug-24 07:00 4 Hours
Daily
62s 12 (62s Brazeau Plant) maintenance  
SUNCOR 01-Aug-24 08:00 06-Aug-24 18:00 5.42 Days
Continuous
29EDD-65 29-952-4812 (29EDD-65) FB-29EDD65;29-952-4812 MAIN & TEST;PM 5y (46555391)  
ALTALINK 01-Aug-24 08:30 01-Aug-24 17:30 9 Hours
Daily
72s 652 (72s Leismer) 240kV Breaker Maintenance  
ATCO 04-Aug-24 10:00 04-Aug-24 17:00 7 Hours
Continuous
801S 902, 801s 902 (801s Anderson) Final connection of Bkr 902/52a single pole status inputs to DFR, Commission  
ALTALINK 06-Aug-24 07:00 06-Aug-24 17:00 10 Hours
Daily
928s 180X (928s East Stavely) Crew will call in to operate 928s180X air break to check the proper status of the contacts to new AIS protection.  
ALTALINK 06-Aug-24 07:30 09-Aug-24 14:30 3.29 Days
Continuous
510s ACF21 (510s Sunnybrook), 510s ACF22 (510s Sunnybrook) ACF21 filter bank inspection/maintenance, multiply Outdoor Grounding Switch Maintenances (510s2157, 510s2257)  
ENMAX 06-Aug-24 08:00 06-Aug-24 11:00 3 Hours
Continuous
162B240-RB133 (SS-162) HV Breaker SF6 Gas Sample - 162B240-RB133  
ALTALINK 06-Aug-24 08:00 06-Aug-24 17:00 9 Hours
Daily
180L (15s Fort Macleod - 180AL tap) Re-tie OHSW at structure 538 & 539.  
ATCO 06-Aug-24 08:30 08-Aug-24 17:00 2.35 Days
Continuous
802s 704 (802s Michichi Creek), 7L128 (802s Michichi Creek - 7LA128 tap) BREAKER 704 MIN OIL HLR COMPLETE TESTING  
ATCO 06-Aug-24 09:00 09-Aug-24 17:00 3.33 Days
Continuous
2015s 902T (2015s Yeo) transformer maintenance,  
ATCO 06-Aug-24 09:00 12-Aug-24 16:00 6.29 Days
Continuous
7L64 (779s Chinchaga River - 789s Keg River) Changing Red Tag Poles from T&T  
ATCO 06-Aug-24 09:30 07-Aug-24 17:30 1.33 Days
Continuous
813s 905 (813s Little Smoky) BREAKER SF6 HGF COMPLETE TESTING 905
 
ALTALINK, EPCOR 06-Aug-24 09:30 29-Aug-24 17:00 23.31 Days
Continuous
1059L (EP 803s Lambton - 1059AL tap), 1059AL (52s East Industrial - 1059L tap), 1059L (38s East Edmonton - 1059AL tap), EP 803s L2401 (EP 803s Lambton), EP 803s L2404 (EP 803s Lambton), 52s E2401 (52s East Industrial), 52s T1 (52s East Industrial) Lambton: LDS8,1059L CVT LCR, and Steel Structure Refurbishment  
ALTALINK, EPCOR 06-Aug-24 09:30 29-Aug-24 17:00 23.31 Days
Continuous
1059L (38s East Edmonton - 1059AL tap), 1059L (EP 803s Lambton - 1059AL tap) Lambton: LDS8,1059L CVT LCR, and Steel Structure Refurbishment  
ATCO 06-Aug-24 10:00 09-Aug-24 16:00 3.25 Days
Continuous
2075s ACF22 (2075s Newell), 2075s ACF23 (2075s Newell), 2075s ACF24 (2075s Newell) FILTER BANK AC MAINTENANCE @ NEWELL 2075S ACF22, 2075S ACF23, & 2075S ACF24  
ENMAX 06-Aug-24 11:00 06-Aug-24 13:00 2 Hours
Continuous
162B240-RB131 (SS-162) HV Breaker SF6 Gas Sample - 162B240-RB131  
ENMAX 06-Aug-24 13:00 06-Aug-24 16:00 3 Hours
Continuous
162B240-RB134 (SS-162) HV Breaker SF6 Gas Sample - 162B240-RB134  
SUNCOR 07-Aug-24 08:00 12-Aug-24 18:00 5.42 Days
Continuous
29EDD-65 29-952-4822 (29EDD-65) FB-29EDD65;29-952-4822 MAIN & TEST;PM 5y (46555394)  
ALTALINK 08-Aug-24 10:30 08-Aug-24 15:30 5 Hours
Daily
42s 906N (42s Sarcee), 906L (17s Benalto - 42s Sarcee) PRC5 First Trip followed by maintenance.  
EPCOR 12-Aug-24 07:00 06-Mar-25 17:00 206.46 Days
Continuous
987s T1 (987s Clover Bar) LCR: Cloverbar TX1  
ATCO 12-Aug-24 08:00 15-Aug-24 16:00 3.33 Days
Continuous
7L228 (845s Big Mountain - 7L20 tap) Changing rotten cross arm and poles  
BCH 12-Aug-24 09:00 16-Aug-24 17:00 4.33 Days
Continuous
2L294 (BCH A. A. Lambert - BCH Nelway) 2L294 (AAL-NLY) replace structure BC maintenance does not affect the Alberta ATC AB-BC
ATCO 12-Aug-24 09:00 16-Aug-24 17:30 4.35 Days
Continuous
700s 704 (700s Bonnyville), 7L146 (700s Bonnyville - 970s Bourque) HPL Breaker 704 Complete testing
Replace Densimeter Covers
 
ATCO 12-Aug-24 09:30 13-Aug-24 17:30 1.33 Days
Continuous
813s 908 (813s Little Smoky) BREAKER SF6 HGF COMPLETE TESTING 908  
ATCO 12-Aug-24 10:00 15-Aug-24 17:00 3.29 Days
Continuous
959s SVC (959s Lanfine) Converter inspection, fire system inspection  
ALTALINK 12-Aug-24 14:30 13-Aug-24 17:00 26.5 Hours
Continuous
562s 252 (562s Cypress) 562s252 Maint.  
ALTALINK 13-Aug-24 07:00 15-Aug-24 17:00 2.42 Days
Continuous
83s T1 (83s Taber) The roof of the control building is leaking. Crew needs access to roof to repair. 25kV bus is within limits of approach when workers are on roof. Clearance cannot be achieved to perform work without an outage.  
SUNCOR 13-Aug-24 08:00 27-Aug-24 16:00 14.33 Days
Continuous
29EDD-94 406T (29EDD-94 Voyageur), 29EDD-94 29-952-9702 (29EDD-94 Voyageur), 29EDD-94 29-952-9703 (29EDD-94 Voyageur), 29EDD-94 29-952-9704 (29EDD-94 Voyageur), 29EDD-94 29PS-399 (29EDD-94 Voyageur), 29EDD-94 29PS-391 (29EDD-94 Voyageur) BP-BPC-24-49 - 29EDD-94-29PT-409; 29PP-98; 29PP-67; 5 year PM 29PPS-399 Replace Coil; 29PT-406 Replace AVR; 29PS-391 (CG)  
ALTALINK 13-Aug-24 08:30 15-Aug-24 13:30 2.21 Days
Continuous
103s 552 (103s Goose Lake) 103s552 First Trip, gas leak repair and Maint.  
ATCO 13-Aug-24 10:00 13-Aug-24 17:00 7 Hours
Continuous
801S 903, 801s 903 (801s Anderson) Final connection of Bkr 903 52a single pole status inputs to DFR, Commission  
ALTALINK 14-Aug-24 08:30 15-Aug-24 14:30 30 Hours
Continuous
562s 1152 (562s Cypress) 562s252 Maint.  
ATCO 14-Aug-24 10:00 14-Aug-24 17:00 7 Hours
Continuous
801S 904, 801s 904 (801s Anderson) Final connection of Bkr 904 52a single pole status inputs to DFR, Commission  
ALTALINK, EPCOR 15-Aug-24 07:00 15-Aug-24 18:00 11 Hours
Daily
1059L (38s East Edmonton - 1059AL tap), 1059L (EP 803s Lambton - 1059AL tap) Cutover new alarms, controls, and statuses to new SCADA system.  
ATCO 15-Aug-24 10:00 15-Aug-24 17:00 7 Hours
Continuous
801s 905 (801s Anderson) Final connection of Bkr 905 52a single pole status inputs to DFR, Commission  
ATCO 16-Aug-24 10:00 16-Aug-24 17:00 7 Hours
Continuous
801s 906 (801s Anderson) Final connection of Bkr 906 52a single pole status inputs to DFR, Commission  
ATCO 17-Aug-24 10:00 17-Aug-24 17:00 7 Hours
Continuous
801s 907 (801s Anderson) Final connection of Bkr 907 52a single pole status inputs to DFR, Commission  
ATCO 18-Aug-24 10:00 18-Aug-24 17:00 7 Hours
Continuous
801s 908 (801s Anderson) Final connection of Bkr 908 52a single pole status inputs to DFR, Commission  
EPCOR 19-Aug-24 07:00 22-Aug-24 17:00 3.42 Days
Continuous
EP 803s T1 (EP 803s Lambton) Lambton: TX1 PDR and Conservator Leak Repair  
ALTALINK, EPCOR 19-Aug-24 07:00 25-Aug-24 17:00 6.42 Days
Continuous
1239L (330p Genesee - 510s Sunnybrook), 330p 1205 (330p Genesee), 330p 1206 (330p Genesee) Genesee: 1239L CVT, Arrestor Doble and 1239LD, 1205b, 1206B Disconnect Maintenance and 1239L, 1205, 1206 P&C Maintenance  
ATCO 19-Aug-24 08:00 22-Aug-24 16:00 3.33 Days
Continuous
7L228 (845s Big Mountain - 7L20 tap) Changing rotten cross arm and poles  
BCH 19-Aug-24 09:00 30-Aug-24 17:00 11.33 Days
Continuous
5L92 (BCH Cranbrook - BCH Selkirk) 5L92 replace insulators & spacers BC maintenance does not affect the Alberta ATC AB-BC
ALTALINK, EPCOR 19-Aug-24 09:30 25-Aug-24 17:00 6.31 Days
Continuous
1239L (330p Genesee - 510s Sunnybrook) Genesee: 1239L CVT, Arrestor Doble and 1239LD, 1205b, 1206B Disconnect Maintenance and 1239L, 1205, 1206 P&C Maintenance  
ALTALINK 19-Aug-24 12:30 20-Aug-24 17:00 28.5 Hours
Daily
205s 452 (205s Castle Rock Ridge) 205s452 Maint. First Trip  
ALTALINK 19-Aug-24 13:00 22-Aug-24 17:30 3.19 Days
Continuous
89s 952 (89s Ellerslie) Breaker maint. + First Trip, repair riser hot spot  
ATCO 20-Aug-24 09:30 21-Aug-24 17:30 1.33 Days
Continuous
834s 903 (834s Wesley Creek) 903 B Phase Counter Replacement at 834s Wesley Creek
PRC-005 - TRIP COIL TESTING
 
ENMAX, ALTALINK 21-Aug-24 07:00 25-Aug-24 18:00 4.46 Days
Continuous
50L (44s Bearspaw Plant - SS-21) Repair woodpecker damage at structures 119 & 122. Replace structures 116 & 117.  
EPCOR 22-Aug-24 07:00 23-Aug-24 17:00 1.42 Days
Continuous
816s T2 (816s Petrolia), 816s P2404 (816s Petrolia), 816s P2405 (816s Petrolia) Petrolia: P2404 Breaker LCR Commissioning (PAB2 Op Checks)  
ATCO 22-Aug-24 08:00 27-Aug-24 12:00 5.17 Days
Continuous
7L224 (650s Hansman Lake - 774s Monitor) Pole change under TCM L-L mitigation project 1102671  
ATCO 22-Aug-24 09:30 23-Aug-24 17:30 1.33 Days
Continuous
834s 904 (834s Wesley Creek) RTXP Test Switch Mitigation and Replacement
BREAKER SF6 HPL COMPLETE TESTING
PRC-005 - TRIP COIL TESTING
 
EPCOR 26-Aug-24 07:00 27-Aug-24 17:00 1.42 Days
Continuous
1164L (816s Petrolia - EP Riverview), 816s P2404 (816s Petrolia), 816s P2403 (816s Petrolia) Petrolia: P2404 Breaker LCR Commissioning (PDS12 Op Checks)  
EPCOR 26-Aug-24 07:00 30-Aug-24 17:00 4.42 Days
Continuous
987s T1 (987s Clover Bar), 987s CCP7213 (987s Clover Bar), 987s CCP7214 (987s Clover Bar), 987s C2401 (987s Clover Bar), 987s C2403 (987s Clover Bar), 987s CDS18 (987s Cloverbar) PT retest and C2401 dashpot repair  
EPCOR 26-Aug-24 07:00 31-Aug-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  
EPCOR 26-Aug-24 07:00 31-Aug-24 17:00 5.42 Days
Continuous
T4 (Poundmaker), PM2403 (Poundmaker), PM2402 (Poundmaker), PM721 (Poundmaker) Poundmaker: (TX4 Zone) PM2402, PM2403 Breaker Maintenance and BUS 3 CVT Doble and PMAB4, PMDS4, PMDS5 Disconnect Maintenance  
ATCO 26-Aug-24 08:00 29-Aug-24 16:00 3.33 Days
Continuous
7L228 (845s Big Mountain - 7L20 tap) Changing rotten cross arm and poles  
ATCO 26-Aug-24 08:00 30-Aug-24 16:00 4.33 Days
Continuous
7L69 (731s Elmworth - 815s Goodfare) Changing rotten poles  
ATCO 26-Aug-24 08:00 20-Sep-24 17:30 25.4 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 post replacement testing HMI Server 1 replacement and commissioning. Annual maintenance AB-SK
ALTALINK 26-Aug-24 12:00 26-Aug-24 16:00 4 Hours
Daily
180L (15s Fort Macleod - 180AL tap) Commission 15s180N status LTO to new AIS relays  
ALTALINK 26-Aug-24 12:30 28-Aug-24 17:30 2.21 Days
Continuous
28s 5 (28s West Brooks) PRC5 First Trip followed by maintenance.  
ALTALINK 27-Aug-24 08:30 28-Aug-24 16:30 1.33 Days
Continuous
562s 1052 (562s Cypress) 562s1052 – PRC5 First Trip / breaker maintenance / PRC5  
ATCO 27-Aug-24 10:00 27-Aug-24 17:00 7 Hours
Continuous
801s 909 (801s Anderson) Final connection of Bkr 909 52a single pole status inputs to DFR, Commission  
ALTALINK 27-Aug-24 12:30 27-Aug-24 17:00 4.5 Hours
Daily
463L (15s Fort Macleod - 463AL tap) Commission 15s463 status LTO to new AIS relays  
ALTALINK 27-Aug-24 23:00 29-Aug-24 07:00 1.33 Days
Continuous
250p 22 (250p Bighorn Plant) maintenance  
ALTALINK 28-Aug-24 07:00 29-Aug-24 07:00 24 Hours
Continuous
250p 11 (250p Bighorn Plant) maintenance  
ALTALINK 28-Aug-24 07:30 28-Aug-24 17:30 10 Hours
Continuous
349s T1 (349s Stavely) Commission new LTO status to new AIS relays . Update and test new settings for tx prot  
ATCO 28-Aug-24 10:00 28-Aug-24 17:00 7 Hours
Continuous
801s 910 (801s Anderson) Final connection of Bkr 910 52a single pole status inputs to DFR, Commission  
ALTALINK 29-Aug-24 08:30 29-Aug-24 15:30 7 Hours
Daily
100L (498s Tilley - 895s Suffield) 895s100 – PRC5 First Trip / breaker maintenance / PRC5  
ATCO 29-Aug-24 10:00 29-Aug-24 17:00 7 Hours
Continuous
801s 911 (801s Anderson) Final connection of Bkr 911 52a single pole status inputs to DFR, Commission  
ATCO 30-Aug-24 10:00 30-Aug-24 17:00 7 Hours
Continuous
801s 912 (801s Anderson) Final connection of Bkr 912 52a single pole status inputs to DFR, Commission  
EPCOR 03-Sep-24 07:00 06-Sep-24 17:00 3.42 Days
Continuous
EP 805s J2405 (EP 805s Jasper) Jasper: J2405 CT Doble  
EPCOR, ALTALINK 03-Sep-24 07:00 07-Sep-24 17:00 4.42 Days
Continuous
EP 803s T3 (EP 803s Lambton), EP 803s L2403 (EP 803s Lambton), EP 803s L2405 (EP 803s Lambton), EP 803s L721 (EP 803s Lambton) Lambton: LDS10 LCR and L2405 P&C Maintenance  
EPCOR 03-Sep-24 07:00 13-Sep-24 17:00 10.42 Days
Continuous
816s P2404 (816s Petrolia), 816s P2405 (816s Petrolia), 816s T2 (816s Petrolia) Petrolia: P2405 Breaker LCR and TX2 Zone Doble and Disconnect Maintenance (042066)  
ALTALINK, TRANSALTA 03-Sep-24 08:00 06-Sep-24 17:00 3.38 Days
Daily
33s T1 (33s Spray) maintenance  
ALTALINK, TRANSALTA 03-Sep-24 08:00 06-Sep-24 17:00 3.38 Days
Daily
33s T2 (33s Spray) maintenance  
ATCO 03-Sep-24 08:00 09-Sep-24 16:00 6.33 Days
Continuous
7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
SUNCOR 03-Sep-24 08:00 19-Sep-24 16:00 16.33 Days
Continuous
29EDD-1 T1 (29EDD-1 Millennium) BP - 29EDD-1 T1 Bushings; 72kv Arresters Replacement; 29EDD1S1052 Densimeter Replacement; 29EDD1S852 Replace Densimeter; OLTC Maintenance and Testing  
ATCO, ALTALINK 03-Sep-24 08:30 05-Sep-24 17:30 2.38 Days
Continuous
825s 901 (825s Whitefish Lake), 9L960 (13s Deerland - 825s Whitefish Lake), 825s 902 (825s Whitefish Lake) 901 PRC Trip Coil Testing
901 NISSIN CT Testing/Inspection
902 PRC Trip Coil Testing
902 NISSIN CT Testing/Inspection
RTXP replacement
 
BCH 03-Sep-24 09:00 13-Sep-24 17:00 10.33 Days
Continuous
5L91 (BCH Ashton Creek - BCH Selkirk) replace insulators & marker balls BC maintenance does not affect the Alberta ATC AB-BC
ALTALINK 03-Sep-24 12:30 04-Sep-24 16:30 28 Hours
Continuous
428s 733X (428s Namaka), 733L (179s Gleichen - 428s Namaka) PRC5 First Trip followed by maintenance.  
ALTALINK 03-Sep-24 12:30 05-Sep-24 16:30 2.17 Days
Continuous
205s 152 (205s Castle Rock Ridge) 205s152 – PRC5 First Trip / breaker maintenance / PRC5  
ALTALINK, EPCOR 04-Sep-24 07:00 04-Sep-24 18:00 11 Hours
Daily
915L (38s East Edmonton - 987s Clover Bar) Cutover new alarms, controls, and statuses to new SCADA system.  
BCH 04-Sep-24 09:00 06-Sep-24 17:00 2.33 Days
Continuous
5L91 (BCH Ashton Creek - BCH Selkirk), 5D44 (BCH Ashton Creek) 5D44, 5D1CB4, 5D2CB3 disconnects inspection BC maintenance does not affect the Alberta ATC AB-BC
ATCO 05-Sep-24 08:00 10-Sep-24 12:00 5.17 Days
Continuous
7L224 (650s Hansman Lake - 774s Monitor) Pole change under TCM L-L mitigation project 1102671  
ATCO 07-Sep-24 09:00 18-Sep-24 17:00 11.33 Days
Continuous
7L29 (791s Rainbow Lake - 850s Rainbow Co-Gen), 791s 705 (791s Rainbow Lake), 850s 701T (850s Rainbow Cogen), 850s 702T (850s Rainbow Cogen) 7L29 protection upgrade @ 791S and 850S. SCADA system upgrade @ 791S and 850S.  
ALTALINK 08-Sep-24 07:00 08-Sep-24 12:30 5.5 Hours
Daily
38s T4 (38s East Edmonton), 38s 240kV Bus 2 (38s East Edmonton) Cutover new alarms, controls, and statuses to new SCADA system.  
ALTALINK 08-Sep-24 11:30 12-Sep-24 17:30 4.25 Days
Continuous
254s T1 (254s Coaldale) Maint. and bushing replacement  
ALTALINK 08-Sep-24 12:30 08-Sep-24 17:30 5 Hours
Daily
38s T1 (38s East Edmonton), 38s 240kV Bus 1 (38s East Edmonton) Cutover new alarms, controls, and statuses to new SCADA system.  
ATCO 09-Sep-24 08:30 13-Sep-24 17:30 4.38 Days
Continuous
825s 902 (825s Whitefish Lake) 902 PRC Trip Coil Testing
902 NISSIN CT Testing/Inspection
 
ATCO 09-Sep-24 10:00 12-Sep-24 17:00 3.29 Days
Continuous
806s 701T (806s Oldman River) 701 for testing  
ATCO 09-Sep-24 10:00 16-Sep-24 17:00 7.29 Days
Continuous
7L62 (797s Kemp River - 905s Meikle) Connect new DFR to 7L62PTY1, 7L62/21A, 21B and commission
Migrate SCADA alarms, control, analogs from the existing RTU to the new Station Controller, end-to-end commissioning
 
ALTALINK 09-Sep-24 12:30 13-Sep-24 15:30 4.13 Days
Continuous
370s T5 (370s North Lethbridge) 370sT5 Maintenance 370s2252 Maint.  
ALTALINK 10-Sep-24 07:00 10-Sep-24 18:00 11 Hours
Daily
908L (38s East Edmonton - 908AL tap), 908L (89s Ellerslie - 908AL tap) Cutover new alarms, controls, and statuses to new SCADA system.  
ALTALINK 10-Sep-24 08:00 11-Sep-24 17:30 1.4 Days
Continuous
899s 749N (899s Edgerton), 749L (899s Edgerton - 7LB749 tap) Replace 749LN A21/L8 line protection.  
ALTALINK 11-Sep-24 07:00 11-Sep-24 18:00 11 Hours
Daily
946L (38s East Edmonton - 89s Ellerslie) Cutover new alarms, controls, and statuses to new SCADA system.  
ALTALINK 11-Sep-24 23:00 12-Sep-24 03:00 4 Hours
Daily
62s 12 (62s Brazeau Plant) maintenance  
ALTALINK 12-Sep-24 07:00 24-Sep-24 18:00 12.46 Days
Continuous
880L (321s Al Rothbauer - 523s Bullshead) Stringing new circuit above 880L between Structures #77 - 89  
EPCOR 13-Sep-24 07:00 04-Oct-24 17:00 21.42 Days
Continuous
816s P2405 (816s Petrolia) Petrolia: P2405 Breaker LCR  
ATCO 13-Sep-24 10:00 13-Sep-24 16:00 6 Hours
Continuous
951s 920C (951s Thickwood), 951s 920 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
EPCOR 14-Sep-24 07:00 23-Sep-24 17:00 9.42 Days
Continuous
CV5 (EP 511s Victoria - 557s Castle Downs), EP 511s Victoria T5 (EP 511s Victoria), EP 511s V2401 (EP 511s Victoria), 557s CD2405 (557s Castle Downs), 557s CD2406 (557s Castle Downs) CV5: Manhole Inspections and Victoria TX5 Zone Doble, VDS25, CDDS16, CDDS11, CDDS10 Disconnect Maintenance and CD2405 P&C Maintenance  
ATCO 16-Sep-24 08:00 23-Sep-24 16:00 7.33 Days
Continuous
7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
ENMAX 16-Sep-24 08:00 04-Oct-24 16:00 18.33 Days
Continuous
65.1TR (SS-65) Transformer Power Factor Test - 65.1TR. Tap Changer Inspection - 65.1-TC  
ATCO 16-Sep-24 09:00 17-Sep-24 17:30 1.35 Days
Continuous
826s 908 (826s Marguerite Lake) Nissin CT inspection and Testing.  
BCH 16-Sep-24 09:00 20-Sep-24 17:00 4.33 Days
Continuous
5L98 (BCH Nicola - BCH Vaseux Lake) replace insulators & marker balls BC maintenance does not affect the Alberta ATC AB-BC
ATCO 16-Sep-24 09:00 23-Sep-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 16-Sep-24 12:30 19-Sep-24 16:30 3.17 Days
Continuous
64s T2 (64s East Crossfield), 64s 138kV Bus1 (64s East Crossfield) 64sT2 Maint, PRC5 checks, and repair 64s33  
ALTALINK 16-Sep-24 12:30 21-Sep-24 17:30 5.21 Days
Continuous
368s T2 (368s Burdett) Maint. and bushing replacement  
ALTALINK 17-Sep-24 07:00 18-Sep-24 18:00 1.46 Days
Continuous
1042L (485s Blackspring Ridge - 554s Travers) Arctic Arrow requires a GOI on 1042L Urgent repair. The project has 13 notifications. 12 notifications consisting of retying overheads and 1 notification of tightening hardware between structures 3-62 at various locations.  
ALTALINK 17-Sep-24 08:00 17-Sep-24 17:00 9 Hours
Daily
100L (498s Tilley - 895s Suffield) Repair OHSW bond at structure 180.  
ALTALINK 18-Sep-24 08:00 18-Sep-24 17:00 9 Hours
Daily
763L (158s Vauxhall - 257s Hull) Repair conductor damage at structure 491.  
ALTALINK 19-Sep-24 08:00 19-Sep-24 17:00 9 Hours
Daily
880L (321s Al Rothbauer - 523s Bullshead) Re-tie OHSW at structure 8.  
ATCO 19-Sep-24 10:00 19-Sep-24 16:00 6 Hours
Continuous
951s 908 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
SUNCOR 20-Sep-24 09:00 28-Sep-24 16:00 8.29 Days
Continuous
29EDD-1 T2 (29EDD-1 Millennium) BP-29EDD-1 - TA - T2 OLTC Maintenance and Testing; 29EDD-1 T2 72LV Arrester replacement (CG)  
EPCOR 23-Sep-24 07:00 23-Sep-24 17:00 10 Hours
Continuous
PM2401 (Poundmaker) Poundmaker: PM2401 Breaker Maintenance  
ALTALINK 23-Sep-24 07:00 29-Sep-24 17:00 6.42 Days
Continuous
850L (525s Carseland - 678s Okotoks) Arctic arrow will require a GOI on 850L to fix the steel core on 1201L 30-44. Once work in the span of 30-44 is completed the crew will return the GOI on 850L. 1201L crosses over 850L at 1201L31-32 span.  
ALTALINK 23-Sep-24 07:15 27-Sep-24 17:45 4.44 Days
Continuous
919L (77s Sagitawah - 310p Sundance) Clearance issue at 77s, re: 77s14 breaker replacement  
ALTALINK 23-Sep-24 08:00 02-Oct-24 17:00 9.38 Days
Continuous
77s 14 (77s Sagitawah) new breaker and foundation install  
ALTALINK 23-Sep-24 08:00 04-Oct-24 18:00 11.42 Days
Continuous
1201L (520s Bennett - BCH Cranbrook) Maintenance tasks str range 18-513.  
ALTALINK 23-Sep-24 08:00 04-Oct-24 18:00 11.42 Days
Continuous
48s 887X (48s Pocaterra), 887L (48s Pocaterra - 978s BCH Britt Creek) 887L required to be open due to 1201L as per AESO Rule AB-BC
ALTALINK 23-Sep-24 08:00 04-Oct-24 18:00 11.42 Days
Daily
786L (799s Coleman - BCH Natal), 799s 786W (799s Coleman) 887L required to be open due to 1201L as per AESO Rule AB-BC
BHE Canada 23-Sep-24 09:00 04-Oct-24 17:00 11.33 Days
Continuous
MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
AESO 23-Sep-24 09:00 04-Oct-24 17:00 11.33 Days
Continuous
Path 1 (AIES Islanding) 5L94 replace insulators & spacers AB-BC
ALTALINK 23-Sep-24 12:00 26-Sep-24 18:00 3.25 Days
Continuous
310p T30 (310p Sundance) 310p T30 25kV Bushing replacement, 69kV Bushing replacement, 69kV LA install, leak repair, maintenance, doble. RSLD 1 to be implemented at the end of the outage.  
ALTALINK 23-Sep-24 13:30 26-Sep-24 17:30 3.17 Days
Continuous
310p 2452 (310p Sundance) Breaker maint. + First Trip on 310p2452  
ALTALINK 23-Sep-24 23:00 06-Nov-24 16:00 43.75 Days
Continuous
62s 11 (62s Brazeau Plant) Major maintenance  
EPCOR 24-Sep-24 07:00 24-Sep-24 17:00 10 Hours
Continuous
PM2404 (Poundmaker) Poundmaker: PM2404 Breaker Maintenance  
EPCOR 24-Sep-24 07:00 11-Oct-24 17:00 17.42 Days
Continuous
240BA3 (629s Argyll Transfer Station - 814s Bellamy) 240BA3: Oil Degassing UGT  
ALTALINK 24-Sep-24 08:30 25-Sep-24 17:30 1.38 Days
Daily
520s T1 (520s Bennett), 520s 552 (520s Bennett) 520sT1, 552 Maintenance..  
ATCO 26-Sep-24 10:00 26-Sep-24 16:00 6 Hours
Continuous
951S 902 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
BCH 30-Sep-24 08:00 04-Oct-24 16:00 4.33 Days
Continuous
5L94 (BCH Cranbrook - 102s Langdon) 5L94 replace insulators & spacers AB-BC
BCH 30-Sep-24 08:00 04-Oct-24 16:00 4.33 Days
Continuous
1L275 (799s Coleman - BCH Natal) 5L94 replace insulators & spacers AB-BC
ATCO 30-Sep-24 08:00 07-Oct-24 16:00 7.33 Days
Continuous
7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
ATCO 30-Sep-24 08:30 03-Oct-24 17:30 3.38 Days
Continuous
825s 903 (825s Whitefish Lake) 903 PRC Trip Coil Testing
903 NISSIN CT Testing/Inspection
 
ATCO 30-Sep-24 09:00 07-Oct-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 01-Oct-24 07:00 01-Oct-24 11:00 4 Hours
Daily
523s 880 (523s Bullshead), 880L (321s Al Rothbauer - 523s Bullshead) Test Trip from new T1 ‘A’ and T1 ‘B’ protection relays  
ALTALINK, EPCOR 01-Oct-24 07:00 02-Oct-24 17:00 1.42 Days
Continuous
1044L (EP 805s Jasper - 816s Petrolia), 816s P2405 (816s Petrolia), 816s P2406 (816s Petrolia) Petrolia: P2405 Breaker LCR Commissioning (PDS14 Op Checks)  
ALTALINK 01-Oct-24 07:00 03-Oct-24 18:00 2.46 Days
Continuous
727L52N (727AL tap), 727L52S (727AL tap), 727A1L (303s Saddlebrook - 727L tap), 727AL (142s Magcan - 727L tap) Replace Dead-end insulators at structures 7 & 20. Replace crossarms and insulators at structure 11.  
EPCOR 01-Oct-24 07:00 11-Oct-24 17:00 10.42 Days
Continuous
987s T3 (987s Clover Bar), 987s C2407 (987s Clover Bar) Cloverbar TX3 DGA Install  
BCH 01-Oct-24 08:00 01-Oct-24 16:00 8 Hours
Continuous
1L274 (48s Pocaterra - 978s BCH Britt Creek) CBK 5RX5 / CBK 5B5 / 5L94 - 5CVT5 Inspection AB-BC
BCH 01-Oct-24 08:00 01-Oct-24 16:00 8 Hours
Continuous
1L275 (799s Coleman - BCH Natal) CBK 5RX5 / CBK 5B5 / 5L94 - 5CVT5 Inspection AB-BC
BCH 01-Oct-24 09:00 11-Oct-24 17:00 10.33 Days
Continuous
T3 (BCH Natal) NTL station rebuild. T3 OOS for PN replacement AB-BC
ALTALINK 01-Oct-24 12:30 03-Oct-24 16:30 2.17 Days
Daily
59s 352 (59s Peigan) Maint. and gauge replacement  
ENMAX, ALTALINK 02-Oct-24 08:00 06-Oct-24 16:00 4.33 Days
Continuous
936L (5s East Calgary - 102s Langdon) Tower climbing inspections. Install dampers.  
ENMAX, ALTALINK 02-Oct-24 08:00 06-Oct-24 16:00 4.33 Days
Continuous
937L (5s East Calgary - 102s Langdon) Tower climbing inspections. Install dampers.  
ATCO 02-Oct-24 10:00 02-Oct-24 16:00 6 Hours
Continuous
951s 906 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
ALTALINK 02-Oct-24 11:00 02-Oct-24 15:00 4 Hours
Daily
523s 676 (523s Bullshead), 676L (244s Bowmanton - 523s Bullshead) Test Trip from new T1 ‘A’ and T1 ‘B’ protection relays  
EPCOR 03-Oct-24 07:00 04-Oct-24 17:00 1.42 Days
Continuous
816s T2 (816s Petrolia), 816s P2404 (816s Petrolia), 816s P2405 (816s Petrolia) Petrolia: P2405 Breaker LCR Commissioning (PAB2 Op Checks)  
ALTALINK 04-Oct-24 08:00 06-Oct-24 17:00 2.38 Days
Continuous
607L (135s Conrad - 607AL tap) Replace x-brace at structure 213. Install Post insulators on structure 222. Replace structure 242.  
EPCOR 07-Oct-24 07:00 11-Oct-24 17:00 4.42 Days
Continuous
EP 803s T3 (EP 803s Lambton), EP 803s L721 (EP 803s Lambton) Lambton: L721 Bay PT LCR  
ALTALINK 07-Oct-24 07:00 16-Oct-24 17:00 9.42 Days
Continuous
1325L (510s Sunnybrook - AML 511s Crossings) WATL Annual Link Outage, DC Yard maintenance, Valve Hall Grading Electrode Inspections, VCS work, 511s5957 Ground Switch Repairs  
EPCOR 07-Oct-24 07:00 08-Nov-24 17:00 32.46 Days
Continuous
816s P2402 (816s Petrolia) Petrolia: P2402 Breaker LCR  
ENMAX 07-Oct-24 08:00 25-Oct-24 16:00 18.33 Days
Continuous
65.2TR (SS-65) Transformer Power Factor Test - 65.2TR. Tap Changer Inspection - 65.2-TC  
BCH 07-Oct-24 09:00 07-Oct-24 17:00 8 Hours
Continuous
2L293 (BCH Nelway - BCH Selkirk) NLY 2D22 disconnect maintenance BC maintenance does not affect the Alberta ATC

AB-BC
ATCO 07-Oct-24 09:00 16-Oct-24 18:00 9.38 Days
Continuous
7L20 (740s H.R. Milner - 810s Dome Cutbank) Changing several structures on 7L20 between 740S HR Milner and 810S Dome Cutbank, from STR 306-58 on 7L20.  
BCH 07-Oct-24 09:00 01-Nov-24 17:00 25.33 Days
Continuous
2L293 (BCH Nelway - BCH Selkirk) 2L293 replace structure & crossarms BC maintenance does not affect the Alberta ATC AB-BC
ATCO 07-Oct-24 10:00 10-Oct-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 07-Oct-24 10:00 21-Oct-24 15:00 14.21 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) Relocate 700PT1 connections to the east side of the PT structure & create a J1 on the west side of the PT structure.  
ATCO 07-Oct-24 10:00 28-Oct-24 17:00 21.29 Days
Continuous
9L100 (801s Anderson - 807s Sheerness) Replace Breaker 902 @ 807S Sheerness, complete line 21A, 21B/9L100 protection upgrade and Commissioning  
ALTALINK 07-Oct-24 13:00 10-Oct-24 17:30 3.19 Days
Continuous
89s 352 (89s Ellerslie) Breaker maint. + First Trip, replace leaking grading capacitor  
ALTALINK 10-Oct-24 07:30 11-Oct-24 16:30 1.38 Days
Continuous
AML 511s T30 (AML 511s Crossings), AML 511s SVC Plus (AML 511s Crossings) ACF14 and SVC+ Inspection & Maintenance.  
ATCO 10-Oct-24 10:00 10-Oct-24 16:00 6 Hours
Continuous
951s 905 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
ALTALINK 11-Oct-24 08:00 12-Oct-24 17:00 1.38 Days
Continuous
507L (83s Taber - 257s Hull) replace OHSW assembly at structures 3 & 4, replace structure 22  
ATCO 14-Oct-24 09:00 21-Oct-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
 
ATCO 14-Oct-24 10:00 17-Oct-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 15-Oct-24 08:00 21-Oct-24 16:00 6.33 Days
Continuous
7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
ALTALINK 16-Oct-24 07:00 16-Oct-24 18:00 11 Hours
Daily
913L (69s North Barrhead - 732s Mitsue) Replace Insulators at structure 150.  
ALTALINK 16-Oct-24 07:00 16-Oct-24 18:00 11 Hours
Daily
463AL (492s Monarch - 463L tap), 463L (15s Fort Macleod - 463AL tap), 492s T1 (492s Monarch) Hardware tighten structures 48 & 49. Repair downlead at structures 32 & 36.  
ALTALINK 16-Oct-24 07:00 25-Oct-24 18:00 9.46 Days
Continuous
820AL (315s Chin Chute - 820L tap), 820BL (967s Redcoat - 820L tap), 820L (254s Coaldale - 820AL tap), 820L (67s Stirling - 820BL tap), 820L (820AL tap - 820BL tap), 67s T2 (67s Stirling) LCM & WFM on several structures between Structures #172 - 325  
ATCO 16-Oct-24 09:00 28-Oct-24 17:00 12.33 Days
Continuous
7L81 (791s Rainbow Lake - BCH Harvest Energy FNC Tap), 791s 702 (791s Rainbow Lake) 7L81 upgrade @ 791S.
Scada system upgrade @ 791S
 
ALTALINK 16-Oct-24 10:00 16-Oct-24 14:00 4 Hours
Daily
250p 11 (250p Bighorn Plant) maintenance  
ALTALINK 17-Oct-24 07:00 18-Oct-24 18:00 1.46 Days
Continuous
765L (151s Strathmore - 419s Chestermere) Perform maintenance work on structures 63, 64, 65, 290, 292 and 293.  
ALTALINK, Lethbridge 17-Oct-24 08:00 19-Oct-24 17:00 2.38 Days
Continuous
207L (111s Coalbanks - 370s North Lethbridge) Install post insulators on structure 6. Hardware tighten structure 8. Replace structure at structure 11.  
ALTALINK 17-Oct-24 09:00 17-Oct-24 15:00 6 Hours
Daily
1202L (89s Ellerslie - 320p Keephills), 320p 3152 (320p Keephills), 320p 3052 (320p Keephills) connect Summated 1202L CT from 320p3152 & 320p3052 to new PMU  
ALTALINK 17-Oct-24 10:00 17-Oct-24 14:00 4 Hours
Daily
250p 22 (250p Bighorn Plant) maintenance  
ALTALINK, EPCOR 18-Oct-24 09:00 18-Oct-24 15:00 6 Hours
Daily
1203L (320p Keephills - 510s Sunnybrook), 320p 3452 (320p Keephills), 320p 2952 (320p Keephills) connect Summated 1203L CT from 320p3452 & 320p2952 to new PMU  
ALTALINK 20-Oct-24 07:00 20-Oct-24 18:00 11 Hours
Daily
944L (132s Ware Junction - 275s Jenner) Re-tie OHSW at Structure #944L199  
ALTALINK 20-Oct-24 07:00 21-Oct-24 18:30 1.48 Days
Continuous
275s 240kV Bus 2 (275s Jenner), 275s T2 (275s Jenner) Replace CVT8, replace JB and wire, like for like replacement  
ALTALINK 21-Oct-24 08:00 26-Oct-24 17:00 5.38 Days
Continuous
760L (760AL tap - 7LA760 tap) Replace cross arms and insulators on 7L760, 242 structures  
ALTALINK 21-Oct-24 09:00 21-Oct-24 15:00 6 Hours
Daily
1045AL (320p Keephills - 1045L tap), 320p 1352 (320p Keephills) Connect 1045AL CT from 320p1352 to new PMU  
BCH 21-Oct-24 09:00 25-Oct-24 17:00 4.33 Days
Continuous
5L51 (BPA Custer - BCH Ingledow) ING 5CB3 insp, BC maintenance does not affect the Alberta ATC AB-BC
ATCO 21-Oct-24 10:00 24-Oct-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.  
ALTALINK 21-Oct-24 13:30 24-Oct-24 17:30 3.17 Days
Continuous
320p 3152 (320p Keephills) 500kV breaker maintenance  
ALTALINK, EPCOR 22-Oct-24 09:00 22-Oct-24 15:00 6 Hours
Daily
1043L (320p Keephills - 367s Harry Smith), 320p 252 (320p Keephills), 320p 352 (320p Keephills) Connect Summated 1043L CT from 320p252 & 320p352 to new PMU  
ALTALINK 23-Oct-24 09:00 23-Oct-24 15:00 6 Hours
Daily
190L (17s Benalto - 320p Keephills), 320p 652 (320p Keephills), 320p 552 (320p Keephills) Connect Summated 190L CT from 320p552 & 320p652 to new PMU  
ALTALINK, EPCOR 24-Oct-24 09:00 24-Oct-24 15:00 6 Hours
Daily
930L (37s North Calder - Poundmaker), 320p 2052 (320p Keephills), 320p 2152 (320p Keephills) Connect Summated 903L CT from 320p2052 & 320p2152 to new PMU  
ALTALINK 28-Oct-24 07:00 10-Nov-24 18:00 13.5 Days
Continuous
100L (498s Tilley - 895s Suffield) Upgrade 100L for 1061s Alderson Park Interconnection Project.  
ALTALINK 28-Oct-24 08:00 02-Nov-24 17:00 5.38 Days
Continuous
760L (760AL tap - 7LA760 tap) Replace cross arms and insulators on 7L760, 242 structures  
ATCO 28-Oct-24 08:00 04-Nov-24 16:00 7.38 Days
Continuous
7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
ATCO 28-Oct-24 09:00 04-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
 
BCH 28-Oct-24 09:00 08-Nov-24 17:00 11.38 Days
Continuous
T4 (BCH Natal) NTL station rebuild, T4 out of service for PN replacement AB-BC
ALTALINK 28-Oct-24 13:30 31-Oct-24 17:30 3.17 Days
Continuous
89s 1752 (89s Ellerslie) 500kV breaker maintenance  
EPCOR 29-Oct-24 07:00 31-Oct-24 17:00 2.42 Days
Continuous
816s P2402 (816s Petrolia), 816s P2401 (816s Petrolia), 816s T1 (816s Petrolia) Petrolia: P2402 Breaker LCR Commissioning (PAB1 Op Checks)  
ALTALINK 29-Oct-24 09:00 29-Oct-24 15:00 6 Hours
Daily
320p 3052 (320p Keephills), 320p 2952 (320p Keephills) Connect Summated KH3 CT from 320p3052, 320p2952 to new PMU  
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 downlead and install ground rod at structure 59. Replace broken insulators at structures 100, 103  
ALTALINK, TRANSALTA 30-Oct-24 09:00 30-Oct-24 15:00 6 Hours
Daily
320p 852 (320p Keephills) Connect KH2 CT from 320p852 to new PMU  
ALTALINK 30-Oct-24 23:00 31-Oct-24 03:00 4 Hours
Daily
62s 11 (62s Brazeau Plant) maintenance  
ALTALINK 31-Oct-24 03:00 31-Oct-24 07:00 4 Hours
Daily
62s 12 (62s Brazeau Plant) maintenance  
ALTALINK 31-Oct-24 07:00 04-Nov-24 18:30 4.52 Days
Continuous
944L (132s Ware Junction - 275s Jenner) Replace VT5 and CT (275s5), install new JB and cabling, like for like replacement.  
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
1055L (629s Argyll Transfer Station - 816s Petrolia), 816s P2402 (816s Petrolia), 816s P2403 (816s Petrolia) Petrolia: P2402 Breaker LCR Commissioning (PDS11 Op Checks)  
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 04-Nov-24 11:00 18-Nov-24 15:00 14.17 Days
Continuous
199L (347s AML Fox Creek - 741s ATC Fox Creek) A741s work by ATCO  
ATCO 04-Nov-24 16:00 18-Nov-24 15:00 13.96 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 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 457A.  
ENMAX, ALTALINK 11-Nov-24 08:00 15-Nov-24 16:00 4.33 Days
Continuous
936L (5s East Calgary - 102s Langdon) Tower climbing inspections. Install dampers  
ENMAX, ALTALINK 11-Nov-24 08:00 15-Nov-24 16:00 4.33 Days
Continuous
937L (5s East Calgary - 102s Langdon) Tower climbing inspections. Install dampers  
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.  
ATCO 12-Nov-24 08:00 18-Nov-24 16:00 6.33 Days
Continuous
7L68 (730s Rycroft - 811s Clairmont Lake) Line Mitigation clearance issue  
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
 
ALTALINK 16-Nov-24 07:00 18-Nov-24 18:00 2.46 Days
Continuous
676L (244s Bowmanton - 523s Bullshead) OPGW will be cut and spliced into to bring the fiber down for the new 1011s Dunmore Substation  
ALTALINK 16-Nov-24 08:00 20-Nov-24 17:00 4.38 Days
Continuous
851L (253s Blackie - 525s Carseland) Replace dead-end insulators at structures 125, 132, 133 & 139. Replace arms and insulators at structures 130, 134, 150, 153 & 155. Replace arms and insulators with line post insulators at structure 131. Repair downlead at structures 139 & 150  
ATCO, ALTALINK 20-Nov-24 07:00 21-Nov-24 18:00 1.46 Days
Continuous
1036L (356s Milo - 554s Travers) Repairing conductor and adjusting sag between structures 18 and 28 See also 290050 1005L (120s-991s-356s) - RB Required due to proximity  
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 457A.  
ATCO 25-Nov-24 08:00 02-Dec-24 16:00 7.33 Days
Continuous
7L68 (730s Rycroft - 811s Clairmont Lake) Line Mitigation clearance issue  
ATCO 25-Nov-24 09:00 02-Dec-24 16:00 7.29 Days
Continuous
7L40 (733s Simonette - 813s Little Smoky) 7l40 Line to ground mitigation  
ENMAX, ALTALINK 26-Nov-24 07:00 26-Nov-24 18:00 11 Hours
Daily
1107L (237s Foothills - SS-65) Replace insulators at structure 33. See also 289764 1106L RB that goes with this.  
ALTALINK 26-Nov-24 07:00 30-Nov-24 18:00 4.46 Days
Continuous
850L (525s Carseland - 678s Okotoks) Replace aerial marker at structure 147. Replace insulators at structure 111, 128 & 129. Replace arms and insulators at structure 130 & 148. Repair downlead at structures 131, 133, 134, 135, 136, 138, 139 & 140.  
ALTALINK 26-Nov-24 08:30 27-Nov-24 17:00 1.35 Days
Continuous
763L (158s Vauxhall - 257s Hull) 158s763N – PRC5 First Trip / breaker maintenance / PRC5  
ALTALINK 28-Nov-24 07:00 03-Dec-24 18:00 5.46 Days
Continuous
612L (336s Fincastle - 368s Burdett) Component replacement STR 36-212.  
ALTALINK 04-Dec-24 10:00 04-Dec-24 14:00 4 Hours
Daily
250p 11 (250p Bighorn Plant) maintenance  
ALTALINK 05-Dec-24 10:00 05-Dec-24 14:00 4 Hours
Daily
250p 22 (250p Bighorn Plant) maintenance  
ATCO 09-Dec-24 08:00 16-Dec-24 16:00 7.33 Days
Continuous
7L68 (730s Rycroft - 811s Clairmont Lake) Line Mitigation clearance issue  
ENMAX, ALTALINK 09-Dec-24 08:00 18-Dec-24 16:00 9.33 Days
Continuous
50L (44s Bearspaw Plant - SS-21) HV SW Replacement 21SW87, 21SW88, 21SW89, 21MD138-21.2TR  
ATCO 09-Dec-24 09:00 16-Dec-24 16:00 7.29 Days
Continuous
7L40 (733s Simonette - 813s Little Smoky) 7l40 Line to ground mitigation  
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)  
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 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  
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 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 17-Feb-25 08:00 20-Feb-25 17:00 3.38 Days
Continuous
7L128 (802s Michichi Creek - 7LA128 tap) Installation of dynamic line rating sensors.  
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 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  
ALTALINK 18-Mar-25 07:00 31-Mar-25 18:00 13.46 Days
Continuous
610L (83s Taber - 336s Fincastle) VATD - Rebuild 610L.  
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
 
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  
ATCO 29-Apr-25 10:00 20-May-25 17:00 21.29 Days
Continuous
9L99 (801s Anderson - 807s Sheerness) Replace Breaker 901 @ 807S Sheerness, complete line 21A, 21B/9L99 protection upgrade and Commissioning  
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 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  
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, 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.  
ALTALINK 01-Oct-25 08:00 05-Nov-25 17:00 35.42 Days
Continuous
102s SVC (102s Langdon), 102s T4 (102s Langdon) the controls change  
ALTALINK 01-Oct-25 08:00 05-Nov-25 18:00 35.46 Days
Continuous
1201L (520s Bennett - BCH Cranbrook) Replacing 102s SVC controls  
ALTALINK 01-Oct-25 08:00 05-Nov-25 18:00 35.46 Days
Continuous
786L (799s Coleman - BCH Natal) 887L required to be open due to 1201L as per AESO Rule  
ALTALINK 01-Oct-25 08:00 05-Nov-25 18:00 35.46 Days
Continuous
887L (48s Pocaterra - 978s BCH Britt Creek) 887L required to be open due to 1201L as per AESO Rule AB-BC

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: 2024-06-12   15:29:06


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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