Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2021-07-10

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
ATCO 17-Jun-21 13:00 12-Jul-21 09:00 24.83 Days
Continuous		 730s 701T (730s Rycroft) transformer class 2 major testing  
ALTALINK 20-Jun-21 11:00 14-Jul-21 18:00 24.29 Days
Continuous		 74s T2 (74s Janet) maintenance  
ATCO 05-Jul-21 08:00 30-Jul-21 15:30 25.31 Days
Continuous		 2075s 917 (2075s Newell), 2075s 918 (2075s Newell), 2075s ACF14 (2075s Newell), 2075s ACF13 (2075s Newell), 2075s ACF12 (2075s Newell), 2075s SVC1 (2075s Newell) cooling system maintenance  
ATCO 05-Jul-21 10:00 13-Jul-21 17:00 8.29 Days
Continuous		 809s 901T (809s Louise Creek), 809s 503R (809s Louise Creek), 809s 504R (809s Louise Creek) modifications to 901T - Louise Creek rebuild project-  
ATCO 05-Jul-21 12:00 12-Jul-21 12:00 7 Days
Continuous		 7L80 (733s Simonette - 740s H.R.Milner) climbing and walk up inspection with insulator repairs  
ALTALINK 08-Jul-21 07:00 13-Jul-21 18:00 5.46 Days
Continuous		 847L (602s Cold Creek - 847AL tap) replace 847L Str 291 and 297 for line clearance mitigation  
ALTALINK 08-Jul-21 07:15 11-Jul-21 17:45 3.44 Days
Continuous		 719L (256s Harmattan - 719CL tap) maintenance work (Strs 4 ~ 72)  
ENMAX 10-Jul-21 12:00 10-Jul-21 18:00 6 Hours
Continuous		 24.81L. 24.83L. 24.1TR. 24PT138-Z31 Substation Summer Washing. Check Reversing Switch . Original Outage June 17th.  
EPCOR 12-Jul-21 07:00 16-Jul-21 17:00 4.42 Days
Continuous		 East Industrial S/S TX2 Bay, 52s T2 (52s East Industrial) Isolate TX2 bay to relocate metering and transformer controls.  
ALTALINK 12-Jul-21 07:30 13-Jul-21 17:00 1.4 Days
Continuous		 205s13 Advice for customer Customer maintenance  
ATCO 12-Jul-21 07:30 16-Jul-21 15:00 4.31 Days
Continuous		 2029S ACF21, 2029S ACF22, 2029S ACF23, 2029s ACF21 (2029s Heathfield), 2029s ACF22 (2029s Heathfield), 2029s ACF23 (2029s Heathfield) PRC testing AC Filter Bank 2
No Filter redundancy during work		  
ENMAX 12-Jul-21 08:00 12-Jul-21 11:00 3 Hours
Continuous		 162B240-RB133, 162B240-RB133 (ENMAX 162) SF6 Sample. Dashpot Checks 162B240-RB133  
EPCOR 12-Jul-21 08:00 16-Jul-21 12:00 4.17 Days
Continuous		 Lambton S/S Tx1 bay outage, EP 803s T1 (EP 803s Lambton) Tower Removal  
ALTALINK 12-Jul-21 08:00 16-Jul-21 16:00 4.33 Days
Continuous		 510s AC Filter 11 - GOI, 510s ACF11 (510s Sunnybrook) Annual Filter Bank outage and inspection  
BCH 12-Jul-21 09:00 16-Jul-21 17:00 4.33 Days
Continuous		 2L294 (A.A. Lambert - Nelway) insulator replacement AB-BC
ALTALINK 12-Jul-21 09:30 14-Jul-21 16:30 2.29 Days
Continuous		 42s906N Advice, 906L (17s Benalto - 42s Sarcee) Migrate and commission all 42s906N & L4-906L at 42s Sarcee associated line protections, recloser, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. .  
ATCO 12-Jul-21 09:30 15-Jul-21 16:00 3.27 Days
Continuous		 885S 901, 885S 902, 9L89, 9L89 (885s McMillan - 2011s Dawes) 901 Breaker Maintenance & 9L89 RTXP switch replacements - The GOI zone can be reduced to 901A, 901B for 885S 901 breaker Maintenance after the RTXP switches have been replaced.  
ATCO 12-Jul-21 10:00 15-Jul-21 16:30 3.27 Days
Continuous		 876S 901T, 876s 901T (876s Brintnell) 901T Leak mitigation, and 901T transformer Maintenance  
ATCO 12-Jul-21 10:00 19-Jul-21 15:00 7.21 Days
Continuous		 7L32, 7L32 (813s Little Smoky - 862s South Bezanson) Crossarm changing  
ENMAX 12-Jul-21 11:00 12-Jul-21 13:00 2 Hours
Continuous		 162B240-RB134, 162B240-RB134 (ENMAX 162) SF6 Sample. Dashpot Checks 162B240-RB134  
ALTALINK, EPCOR 12-Jul-21 11:00 15-Jul-21 18:00 3.29 Days
Continuous		 908L (89s-E816s) - GOI, 89s 652 (89s Ellerslie), 89s 752 (89s Ellerslie), 908L (89s Ellerslie - 816s Petrolia) Replace 240kV PTs 89s75. 89s652 maintenance including 1st trips. Replace 12 grading capacitors.  
ENMAX 12-Jul-21 13:00 12-Jul-21 16:00 3 Hours
Continuous		 162B240-RB131, 162B240-RB131 (ENMAX 162) SF6 Gas Sample, Dashpot Checks 162B240-RB131  
ENMAX 13-Jul-21 08:00 13-Jul-21 16:00 8 Hours
Continuous		 25B240-D132, 25B240-D132 (ENMAX 25) HV Breaker maintenance 25B240-D132  
BCH 13-Jul-21 08:00 13-Jul-21 16:00 8 Hours
Continuous		 1L274 (B1s BCH Natal - 1D1L274) structure refurbishment AB-BC
BCH 13-Jul-21 08:00 13-Jul-21 18:00 10 Hours
Continuous		 1L274 (48s Pocaterra - Britt Creek), 1L275 (799s Coleman - Natal) NTL station work AB-BC
ALTALINK 13-Jul-21 08:00 14-Jul-21 16:00 1.33 Days
Continuous		 510s AC Filter 12 - GOI, 510s ACF12 (510s Sunnybrook) Annual Filter Bank outage and inspections  
ATCO 13-Jul-21 17:01 22-Aug-21 17:00 40 Days
Continuous		 809S 901T, 9L938, 9L938 (77s Sagitawah - 809s Louise Creek) Louise Creek Rebuild project- Replace 912, 900PT1, CT modifications to 906CT, 912CT, and 901T
July 5-13 – Isolation Points: 809S 901TD, 809S 701B, 809S 201TD, 809S 500D1 – 809S 901T OOS
July 13-August 22 – Expand GOI – Isolation points: 809S 911A, 809S 906A, 809S 701A, 809S 500D1, 809S 201TD1 & 77S938N (COG From AltaLink) - 809S 901T OOS & 9L938 OOS
809S 911 Breaker will be in-operable at the end of this outage and will be included on the following GOI for 809S 902T on August 23 2-50617.		  
ALTALINK 14-Jul-21 07:30 15-Jul-21 17:00 1.4 Days
Continuous		 205s14 Advice for customer Customer maintenance  
ENMAX 14-Jul-21 08:00 14-Jul-21 16:00 8 Hours
Continuous		 25B240-D142 HV Breaker maintenance  25B240-D142. Original outage date July 15.  
ALTALINK 14-Jul-21 09:15 19-Jul-21 14:45 5.23 Days
Continuous		 968L (138s - 370s) GOI, 968L (138s Windy Flats - 370s North Lethbridge) Outage required on 240kv bus to install future breaker piles  
ALTALINK 15-Jul-21 07:00 15-Jul-21 18:00 11 Hours
Daily		 729L (542s - 729L13A) - GOI Fire mitigation on Structures #15 & 123  
ALTALINK, Lethbridge 15-Jul-21 08:00 15-Jul-21 13:00 5 Hours
Continuous		 725L (15s Fort MacLeod - 674s Lethbridge Bowron) air break function test and maintance
 
ALTALINK 15-Jul-21 09:00 15-Jul-21 10:30 90 Mins
Daily		 283s836 (836L) - GOI, 836L (61s Lodgepole - 283s Violet Grove) Transformer protection upgrade, trip testing to breaker  
EPCOR 17-Jul-21 07:00 17-Jul-21 17:00 10 Hours
Continuous		 C2403 @ Cloverbar E987S, 987s C2403 (987s Clover Bar) C2403 Dashpot Repair  
ENMAX, ALTALINK 18-Jul-21 08:00 18-Jul-21 18:00 10 Hours
Continuous		 24.83L. 24.81L. 24.1TR, 24.83L (74s Janet - ENMAX 24), 24.81L (ENMAX 24 - ENMAX 31) HV Breaker maintenance 24B138-24.83. SF6 Gas sample 24B138-24BT3. Check reversing switch 24.1TR  
EPCOR 19-Jul-21 07:00 20-Jul-21 17:00 1.42 Days
Continuous		 Summerside S/S SU2401 Bay, 657s SU2401 (657s Summerside) Isolate SU2401 to cutover new controls, status, alarms to new RTU.  
ALTALINK, EPCOR 19-Jul-21 07:00 23-Jul-21 15:00 4.33 Days
Continuous		 1055L (E816s-E814s) Epcor - Info, 1055L (629s Argyll Transfer Station - 816s Petrolia) Epcor Substation Life Cycle Replacement of HV VTs - Petrolia- 1055L CVT and 1055L Line Maintenance  
EPCOR 19-Jul-21 07:00 23-Jul-21 17:00 4.42 Days
Continuous		 Petrolia- 1055L CVT, 1055L (629s Argyll Transfer Station - 816s Petrolia) Substation Life Cycle Replacement of HV VTs - Petrolia- 1055L CVT  
ENMAX 19-Jul-21 08:00 19-Jul-21 16:00 8 Hours
Continuous		 25B240-D138, 25B240-D138 (ENMAX 25) HV Breaker maintenance 25B240-D138  
ALTALINK, ENMAX 19-Jul-21 09:00 22-Jul-21 17:00 3.33 Days
Continuous		 21.80L(42s - Enmax sub #21) GOI, 21.80L (42s Sarcee - ENMAX 21) Migrate and commission all 42s21 (752) & L7-21.80L at 42s Sarcee associated line protections, recloser, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. Install and commission new SCADA meter.  
BCH 19-Jul-21 09:00 23-Jul-21 17:00 4.33 Days
Continuous		 5L91 (Ashton Creek - Selkirk) structure replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ATCO, ALTALINK 19-Jul-21 09:30 22-Jul-21 16:00 3.27 Days
Continuous		 885S 902, 885S 903, 9L55, 9L55 (852s Round Hill - 885s McMillan) 9L55 RTXP replacements
903 Breaker Maintenance
The GOI zone can be reduced to only include 903 breaker after the RTXP switches have been replaced. 903A, 903B		  
ATCO 19-Jul-21 10:00 21-Jul-21 17:00 2.29 Days
Continuous		 813S SVC, 813s SVC (813s Little Smoky) Work on glycol system. Pump replacements and in line filter installation.  
ALTALINK, EPCOR 19-Jul-21 11:00 22-Jul-21 18:00 3.29 Days
Continuous		 908L (89s-E52s-38s) - GOI, 89s 752 (89s Ellerslie), 89s 852 (89s Ellerslie), 908L (89s Ellerslie - 908AL tap), 908AL (52S East Industrial - 908L tap), 908L (38s East Edmonton - 908AL tap) Replace 240kV PTs 89s76. 89s15 maintenance.  
ALTALINK 19-Jul-21 12:30 22-Jul-21 16:30 3.17 Days
Continuous		 562s T1(TX18773) GOI, 562s T1 (562s Cypress) Doble, Maintenance, leak repairs  
ALTALINK 19-Jul-21 13:00 22-Jul-21 17:00 3.17 Days
Continuous		 410s T1 TX18134, 410s T1 (410s Josephburg) 138 kV and 25 kV bushings replacement on Transformer T1. T1 Maintenance, doble, standoffs and oil leaks  
ALTALINK 20-Jul-21 07:00 20-Jul-21 18:00 11 Hours
Daily		 71s1252 - GOI Isolate breaker for ABB representative to complete commissioning  
ALTALINK 20-Jul-21 07:15 21-Jul-21 17:45 1.44 Days
Continuous		 891L (891L1 - 226s) GOI, 891L (226s Garden City - 863L tap) Scope of work includes maintenance on structures 7, 9, 15, 17, 18, 20, 24, 28, 29, 30, 35 and 37  
ENMAX 20-Jul-21 08:00 20-Jul-21 16:00 8 Hours
Continuous		 25B240-D139, 25B240-D139 (ENMAX 25) HV Breaker maintenance 25B240-D139  
ATCO 20-Jul-21 08:00 20-Jul-21 17:00 9 Hours
Continuous		 7L760, 7L760 (767s Oyen - 7LA760 tap), 7LA760 (914s Bindloss - 7LA760 tap) Planned High load to cross under 7L760 in Two locations  
EPCOR 21-Jul-21 07:00 21-Jul-21 17:00 10 Hours
Continuous		 Summerside S/S SU2402 Bay, 657s SU2402 (657s Summerside) Isolate SU2402 to cutover controls, status, alarms to new RTU.  
ALTALINK 21-Jul-21 07:00 21-Jul-21 18:00 11 Hours
Daily		 71s1352 - GOI Isolate breaker for ABB representative to complete commissioning  
ALTALINK 21-Jul-21 08:15 21-Jul-21 17:15 9 Hours
Daily		 63s552 GOI, 63s 552 (63s Red Deer) 1st trip PRC5 maintenance  
EPCOR 22-Jul-21 07:00 22-Jul-21 17:00 10 Hours
Continuous		 Summerside S/S SU2403 Bay, 657s SU2403 (657s Summerside) Isolate SU2403 to cutover new controls, status, alarms to new RTU.  
ALTALINK 22-Jul-21 09:00 22-Jul-21 17:30 8.5 Hours
Daily		 17s2 GOI, 17s 2 (17s Benalto) 240kV breaker maintenance  
EPCOR 23-Jul-21 07:00 23-Jul-21 17:00 10 Hours
Continuous		 Summerside S/S SU2404 Bay, 657s SU2404 (657s Summerside) Isolate SU2404 to cutover new controls, status, alarms to new RTU.  
ENMAX, ALTALINK 23-Jul-21 08:00 10-Aug-21 16:00 18.33 Days
Continuous		 7.82L, 7.82L (42s Sarcee - ENMAX 7) Line relocation at Bow Trail. Phasing required.  
EPCOR, ALTALINK 23-Jul-21 15:00 23-Jul-21 17:00 2 Hours
Continuous		 1055L Extended Zone @ Petrolia E816S and Argyll Transfer Station E629S, 816s P2402 (816s Petrolia), 816s P2403 (816s Petrolia), 1055L (629s Argyll Transfer Station - 816s Petrolia) Extended zone to energize new Petrolia CVT's with breaker.  
ALTALINK 24-Jul-21 07:15 25-Jul-21 12:45 29.5 Hours
Continuous		 419s691 (691) GOI, 691L (74s Janet - 419s Chestermere) Install and commission relays for RAS on 691L, remove RAS from line protection relay.  
ALTALINK 24-Jul-21 08:00 24-Jul-21 17:30 9.5 Hours
Continuous		 74s691 (affect 691L) GOI Replace Breaker 74s691 Grading Capacitors  
EPCOR 26-Jul-21 07:00 29-Jul-21 17:00 3.42 Days
Continuous		 987s GDS1 (987s Cloverbar) Line Maintenance  
EPCOR, ALTALINK 26-Jul-21 07:00 30-Jul-21 17:00 4.42 Days
Continuous		 Dome 909L CVT Replacement, 909L (310p Sundance - 665s Dome) Dome 909LW CVT Replacement  
ENMAX 26-Jul-21 08:00 27-Jul-21 16:00 1.33 Days
Continuous		 833L HV Breaker maintenance 12B138-833L. Original outage June 28-29  
Syncrude 26-Jul-21 08:00 30-Jul-21 20:00 4.5 Days
Continuous		 Significant Outage: T1 Transformer (260/72KV) in D05 Substation Following Circuit Breakers will be operated to isolate T1: 519, 511, 71 Following MOD's will be operated to isolate T1: 519A, 519B, 511A, 511B, 510, 71A, 71B, D05 T1 (D05 Syncrude) Significant Outage:
T1 Transformer (260/72KV) in D05 Substation

Following Circuit Breakers will be operated to isolate T1: 519, 511, 71

Following MOD's will be operated to isolate T1: 519A, 519B, 511A, 511B, 510, 71A, 71B		  
ALTALINK 26-Jul-21 09:00 29-Jul-21 17:00 3.33 Days
Continuous		 916L(42s - 5s) GOI, 916L (5s East Calgary - 42s Sarcee) Migrate and commission all 42s916E (1352) & L13-916L at 42s Sarcee associated line protections, recloser, POW, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. Project PM: Golaleh Rahimi Issue to: Jesse Soonias Contact #: 403-606-8152  
BCH 26-Jul-21 09:00 06-Aug-21 17:00 11.33 Days
Continuous		 5L96 (Selkirk - Vaseux Lake) marker ball installation, BC Maintenance does not affect the Alberta ATC AB-BC
ATCO 26-Jul-21 10:00 29-Jul-21 15:00 3.21 Days
Continuous		 7L40, 7L40 (733s Simonette - 813s Little Smoky) crossarm changes  
ATCO 26-Jul-21 10:00 09-Aug-21 15:00 14.21 Days
Continuous		 7L32 Crossarm changing  
ALTALINK 26-Jul-21 10:30 26-Jul-21 15:30 5 Hours
Daily		 287s552 GOI 240kV breker maintenance  
ALTALINK 26-Jul-21 11:00 26-Jul-21 16:30 5.5 Hours
Daily		 71s1452 - GOI Maintenance on breaker including 1st trip maintenance.  
ATCO 27-Jul-21 08:00 27-Jul-21 11:30 3.5 Hours
Continuous		 2005s 905 Test and Operate. PRC005 Trip coil on Breaker 905  
ATCO 27-Jul-21 09:00 27-Jul-21 15:00 6 Hours
Continuous		 7L89, 7L89 (700s Bonnyville - 721s La Corey) Removing 7L89PT2, as Auto sectionalizing scheme is no longer in required  
ATCO 27-Jul-21 11:45 27-Jul-21 16:30 4.75 Hours
Continuous		 2005s 906 Test and Operate. PRC005 Trip coil on Breaker 906  
ENMAX 28-Jul-21 08:00 28-Jul-21 16:00 8 Hours
Continuous		 36.81L HV Breaker maintenance 36B138-36.81. Original outage date June 30th  
ATCO 28-Jul-21 09:00 28-Jul-21 15:00 6 Hours
Continuous		 7L89 (721s La Corey - 826s Marguerite Lake), 7L89 Removing 7L89PT1, as Auto sectionalizing scheme is no longer in required  
EPCOR 29-Jul-21 07:00 29-Jul-21 17:00 10 Hours
Continuous		 TX3 and 15kV Bus @ Jasper Terminal E805S, 805s T3 (805s Jasper) 15kV Bus PT Inspection with ABB 1007365-039715  
ALTALINK 29-Jul-21 09:00 29-Jul-21 10:30 90 Mins
Daily		 283s836 (836L) - GOI, 836L (61s Lodgepole - 283s Violet Grove) Transformer protection upgrade, trip testing to breaker  
ALTALINK 29-Jul-21 09:30 29-Jul-21 14:30 5 Hours
Daily		 89s252 - GOI Maintenance on breaker including 1st trip maintenance  
EPCOR 30-Jul-21 07:00 05-Aug-21 17:00 6.42 Days
Continuous		 987s GDS3 (987s Cloverbar) Line Maintenance  
ENMAX, ALTALINK 30-Jul-21 08:00 30-Jul-21 16:00 8 Hours
Continuous		 693L. 10.2TR. 10PT138-Z31, 693L (42s Sarcee - ENMAX 10), 10.2TR (ENMAX 10) Power factor test 10PT138-693, 10PT138-Z31  
ALTALINK 03-Aug-21 07:00 06-Aug-21 18:00 3.46 Days
Continuous		 707L (54s-166s), 166s T2 & part. 138kV B 166s maintenance on T2, 166s707X (including 1st trip), & 138kV switches. 54s maintenance on 54s707N (including 1st trip) & 138kV switch. 707L line maintenance.  
ATCO 03-Aug-21 08:00 05-Aug-21 11:30 2.15 Days
Continuous		 848S 907, 848s 907 (848s Ruth Lake) 907 BKR Maintenance  
ATCO 03-Aug-21 08:00 05-Aug-21 17:00 2.38 Days
Continuous		 863S 902, 9L948, 9L948 (650s Hansman Lake - 863s Paintearth) 902 Maintenance  
Syncrude 03-Aug-21 08:00 05-Aug-21 20:00 2.5 Days
Continuous		 Significant Outage: T2 Transfromer (260/72kV) @ D05 Substation Following Breakers will be operated: 78 @ D05 Substation 513 @ D05 Substation 516 @ D05 Substation Following MOD's will be operated: 78A @ D05 Substation 509 @ D05 Substation 513A @ D05 Substa, D05 T2 (D05 Syncrude) Significant Outage:
T2 Transfromer (260/72kV)
@ D05 Substation

Following Breakers will be operated:
78 @ D05 Substation
513 @ D05 Substation
516 @ D05 Substation

Following MOD's will be operated:
78A @ D05 Substation
509 @ D05 Substation
513A @ D05 Substation
516A @ D05 Substation		  
ALTALINK 03-Aug-21 09:15 03-Aug-21 15:45 6.5 Hours
Daily		 514L (513s - 322s - 396s) GOI, 514L (513s Range. Pipe Lundbreck - 514BL tap), 514L (396s Pincher Creek - 514BL tap) 514L2 Replace Insulation  
ALTALINK 03-Aug-21 09:30 05-Aug-21 16:30 2.29 Days
Continuous		 42s Cap bank C2 GOI, 42s C2 (42s Sarcee) Migrate and commission all Cap bank C2 & 42S74 (2152) associated protections, breakers, breaker fail, POW alarms, status, controls, metering and remote access to new RTU and LAN.  
ATCO 03-Aug-21 10:00 09-Aug-21 15:00 6.21 Days
Continuous		 7L40, 7L40 (733s Simonette - 813s Little Smoky) crossarm changes  
ALTALINK 03-Aug-21 11:00 05-Aug-21 17:00 2.25 Days
Daily		 74s552 GOI, 74s 552 (74s Janet) 1st Trip. Crew will get ACC to perform a couple of open and closes as needed when they are ready. Crew may or may not need a GOI depending on the test results of the first trip.  
ALTALINK 03-Aug-21 11:00 12-Aug-21 17:30 9.27 Days
Continuous		 905L (37s - 19s) - GOI, 905L (19s Wabamun - 37s North Calder) Replace 37s77 & 37s79 Switches. Maintenance on 37s76 including first trip testing. Replace grading caps on 37s76.  
ALTALINK 04-Aug-21 08:00 04-Aug-21 17:30 9.5 Hours
Daily		 12s952 - GOI, 12s 952 (12s Heartland) Gas top up and take care of breaker trouble alarm  
ENMAX 04-Aug-21 08:00 05-Aug-21 16:00 1.33 Days
Continuous		 1080L. 25MD240-1080 Replacement  
SUNCOR 04-Aug-21 08:00 10-Aug-21 18:00 6.42 Days
Continuous		 29PL7-2 (29EDD-18 - 29EDD-63) Maintenance and testing of 29PT-179 and 30PT-219, 144 kV breakers/switches, GCB and PRC-005 testing during GTG7 outage  
ALTALINK 05-Aug-21 07:00 05-Aug-21 18:00 11 Hours
Daily		 788L (788L107A - A898s - 602L1) - GOI, 788L (898s Heart Lake - 788AL tap) replacing Structure #285 and maintenance on Structure #284  
ALTALINK 05-Aug-21 07:00 15-Aug-21 18:00 10.46 Days
Continuous		 908L (38s-E52s-89s) - GOI Repair sub bundle, broken inner core between 908L234 and 242. Replace all damaged dead end insulation and jumper strings 908L234. Repair Mid-span OHSW Tie 908L249. Replace all Dead-end insulation to 25 KIP NGK.  
ATCO 05-Aug-21 08:00 06-Aug-21 17:00 1.38 Days
Continuous		 863S 902T, 863s 902T (863s Paintearth) 902T Leak mitigation  
ALTALINK 06-Aug-21 07:15 11-Aug-21 17:45 5.44 Days
Continuous		 444L (217s - 198s) GOI, 444L (198s Blackfalds - 217s North Red Deer) Scope of work includes replacing structures 7, 8, 10 and 12 and maintenance on Structures 1, 2, 6 and 25  
BCH 08-Aug-21 08:00 08-Aug-21 18:00 10 Hours
Continuous		 1L274 (Elkford - EFT1D21), 1L274 (Elkford - EFT1D22) Transformer energization AB-BC
ALTALINK 09-Aug-21 06:00 20-Aug-21 18:00 11.5 Days
Continuous		 121s 138kV North Bus & T5(18407) GOI Cutover of the following protections during outage: 121s831N BF and Control, 831L A&B Prot, 121s814W BF and Control, 814L A&B Prot, 138NB87A, 138NB87B, CVT5 Distribution, T5_A87, T5_B87, 121s37(389) Cont, 121s38(589) Cont.  
EPCOR 09-Aug-21 07:00 11-Aug-21 17:00 2.42 Days
Continuous		 1044L Zone @ Japser Terminal E805S and Petrolia E816S 1044L at Jasper Arrestor Doble, JDS25/JDS6/JDS7 Switch Maintenance  
EPCOR 09-Aug-21 07:00 13-Aug-21 17:00 4.42 Days
Continuous		 805 Bay @ Genesee 330P, 330p 805 (330p Genesee), 330P 12TC1 (330p Genesee) 805 Maintenance and CT Doble  
ATCO 09-Aug-21 08:00 11-Aug-21 17:00 2.38 Days
Continuous		 732S 901 732S 901 Breaker Maintenance  
ATCO 09-Aug-21 08:00 17-Aug-21 17:00 8.38 Days
Continuous		 7L84, 7L84 (722s Crystal Lake - 749s Flyingshot Lake) 7L84 line mitigation project
Modifications to Structures 14,59,128, & 129
Replace switch 702A & 7L84D1		  
ATCO 09-Aug-21 08:00 20-Aug-21 17:30 11.4 Days
Continuous		 2075S 900SST1, 2075s 900SST1 (2075s Newell) - Install Breaker Thermal Windows in LV1 Room at 2075S Newell
- 900SST1 Gasket Repalcements		  
ATCO 09-Aug-21 08:30 11-Aug-21 16:30 2.33 Days
Continuous		 848S 902, 848s 902 (848s Ruth Lake) 902 BKR Maintenance  
ATCO 09-Aug-21 09:00 13-Aug-21 16:00 4.29 Days
Continuous		 766S 901, 9L20 Repair breaker 901 - grading capacitors  
BCH 09-Aug-21 09:00 13-Aug-21 17:00 4.33 Days
Continuous		 5L98 (BCH Nicola - Vaseux Lake) insulator replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK 09-Aug-21 09:30 12-Aug-21 16:30 3.29 Days
Continuous		 42s T2 (Tx18507) GOI, 42s T2 (42s Sarcee) Migrate and commission all T1 TX18507, 42S63 (289), 42S60 (1152) associated transformer protections, tap changer, breaker, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. .  
ATCO 09-Aug-21 12:00 16-Aug-21 15:50 7.16 Days
Continuous		 7L84 Mitigation Work  
ALTALINK 10-Aug-21 07:00 10-Aug-21 18:00 11 Hours
Daily		 787L (71s - 787L29) - GOI, 787L (71s Lamoureux - 787AL tap) Fire mitigation on Structure #8  
ALTALINK 10-Aug-21 07:00 13-Aug-21 18:00 3.46 Days
Continuous		 900L (17s - 63s) - GOI GOI required for Phase Raiser installation on 900L2  
ALTALINK 11-Aug-21 07:30 11-Aug-21 17:00 9.5 Hours
Daily		 166s787W (787L) - GOI, 166s 787W (166s Dow Chem Fort Saskatchewan), 787L (166s Dow Chemical Fort Saskatchewan - 787AL tap) 1st trip and PRC5 maintenance and fix broken shroud  
EPCOR 12-Aug-21 05:00 13-Aug-21 17:00 1.5 Days
Continuous		 1045L @ Jasper Terminal E805S, Keephills 320P, Sundance 310P 1045L at Jasper CVT/Arrestor Doble, JDS27/JDS12 Switch Maintenance  
ATCO 12-Aug-21 08:00 16-Aug-21 17:00 4.38 Days
Continuous		 732S 903 903 Breaker Maintenance  
ALTALINK 12-Aug-21 08:30 12-Aug-21 17:30 9 Hours
Daily		 19s905 (905L) - GOI Replace grading capacitor on 19s905 240kV breaker.  
ENMAX, ALTALINK 13-Aug-21 08:00 13-Aug-21 16:00 8 Hours
Continuous		 1109L., 1109L (ENMAX 25 - ENMAX 65) Power factor test 25MD240-1109 LA. 25 Sub SW152, SW153 Replace Switch Mech  
ATCO 13-Aug-21 08:00 14-Aug-21 17:00 1.38 Days
Continuous		 7L33 Replace Structure 14 on 7L33  
ATCO 13-Aug-21 08:00 20-Aug-21 16:00 7.33 Days
Continuous		 846S 701T, 846S 701TCS, 846S 702T, 846S 702TCS, 7L24, 7L24 (846s Grand Centre - 7LA24 tap), 846s 701T (846s Grand Centre), 846s 702T (846s Grand Centre) Maintenance on 846S
Install mobile sub to by pass 701TCS, 702TCS.		  
ATCO 15-Aug-21 08:00 16-Aug-21 17:00 1.38 Days
Continuous		 7L33 Replace Structure 59 on 7L33  
EPCOR 16-Aug-21 07:00 16-Aug-21 17:00 10 Hours
Continuous		 240BA2 @ Argyll Transfer Station E629S and Bellamy E814S, 240BA2 (629s Argyll Transfer Station - 814s Bellamy) Doble CT/Arrestors  
ATCO 16-Aug-21 08:30 18-Aug-21 16:30 2.33 Days
Continuous		 848S 908, 848s 908 (848s Ruth Lake) 908 BKR Maintenance  
ALTALINK 16-Aug-21 09:30 19-Aug-21 14:30 3.21 Days
Continuous		 17s717W (717L-262s) - GOI, 717L (17s Benalto - 262s Rocky Mountain House) A/B Line prot replacement. Tie in new 138B3 'B' CT cont  
ALTALINK 16-Aug-21 10:30 17-Aug-21 17:30 31 Hours
Continuous		 74s102 (Affecting C3 and C4) Advice PRC5 1st Trip & Maintenance (SF6)  
ALTALINK 16-Aug-21 11:30 19-Aug-21 17:30 3.25 Days
Continuous		 83s T1 GOI, 83s T1 (83s Taber) Replace 138 kV LA’s, TC filter, 25 kV bushings, and 138 kV bushings on T1  
ALTALINK 16-Aug-21 12:00 20-Aug-21 18:00 4.25 Days
Continuous		 946L (89s - 38s) - GOI, 946L (38s East Edmonton - 89s Ellerslie) Component Replacements 946L (Str's Range 30-71)  
ATCO 16-Aug-21 13:00 22-Aug-21 15:30 6.1 Days
Continuous		 930S SVC, 930s SVC (930s Arcenciel) Svc air cooled maintenance, various PRC relay testing  
ALTALINK 17-Aug-21 07:15 19-Aug-21 17:45 2.44 Days
Continuous		 608L (138s - 418s - 528s) GOI and Advice, 608L (138s Windy Flats - 418s Ardenville - 528s Blue Trail Wind Farm) Salvage 608AL31 Airbrake and install at training yard.  
ATCO 17-Aug-21 08:00 19-Aug-21 17:00 2.38 Days
Continuous		 732S 904, 732s 904 (732s Mitsue) 904 Breaker Maintenance  
ALTALINK 17-Aug-21 14:00 17-Aug-21 17:00 3 Hours
Daily		 121s23N Advice, 121s 23N (121s Brooks) 152BF, 452BF, T5 A/B, 138NB A/B protection trip test  
ALTALINK 19-Aug-21 07:00 19-Aug-21 17:30 10.5 Hours
Daily		 166s T1, T2, 707L, 862L & 899L - GOI 1st trip PRC5 maintenance on 166s862N, fix CT shroud and capacitor mount; T1: replace conservator gauge, fix Hydran monitor warning. 166s1 clean and adjust  
ATCO 22-Aug-21 08:00 22-Aug-21 16:00 8 Hours
Continuous		 766S 901T, 766s 901T (766s Nevis) TransAlta GARDEN PLAIN PROJECT
Complete the structural and electrical work related to protection panel, Automation & SCADA panel and telecom panels.
Complete the line work associated with Line 9LA59 which will be connected to 1045S Garden Plain substation.		  
BCH 22-Aug-21 09:00 24-Aug-21 11:00 2.08 Days
Continuous		 1L275 (799s Coleman - Natal) structure replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK 22-Aug-21 10:00 26-Aug-21 17:30 4.31 Days
Continuous		 244s T1(TX18841) GOI, 244s T1 (244s Bowmanton) maintenance, doble, leak repair  
EPCOR 23-Aug-21 07:00 24-Aug-21 17:00 1.42 Days
Continuous		 Summerside/Ellerslie S/S 1057L Outage Isolate 1057L to cut over controls, status, alarms to new RTU at Summerside  
ALTALINK 23-Aug-21 07:00 24-Aug-21 18:00 1.46 Days
Continuous		 862L (166s - 258s) - GOI Replacing 166s4 and also replacing strain insulators on 862L @ 258s  
ATCO 23-Aug-21 08:00 03-Sep-21 17:30 11.4 Days
Continuous		 2075S 900SST2, 2075s 900SST2 (2075s Newell) - Install Breaker Thermal Windows in LV2 Room at 2075S Newell
- 900SST2 Gasket Replacements		  
ATCO 23-Aug-21 08:30 27-Aug-21 17:00 4.35 Days
Continuous		 9L939, 9L939 (77s Sagitawah - 809s Louise Creek) Louise Creek Rebuild project- Replace 911.
9L939 needs to be out of service as it runs over the top of 911 breaker inside the substation		  
ATCO 23-Aug-21 08:30 03-Oct-21 17:00 41.35 Days
Continuous		 809S 902T, 809s 902T (809s Louise Creek) Louise Creek Rebuild project Upgrade 902T protection.
August 23-26, 2021 Replace 911 BKR, Isolation points: 809S 911A, 809S 911B associated with 2-56595 9L939 Outage
Aug 27-Oct.3, 2021
Expand GOI to include all of 902T isolation points 809S 500D1,809S 702A, 809S 910B, & 809S 911B		  
ALTALINK 23-Aug-21 09:30 26-Aug-21 16:30 3.29 Days
Continuous		 42s T1 (Tx18508) GOI, 42s T1 (42s Sarcee) Migrate and commission all T1 TX18508, 42S44 (189), 42S40 (252) associated transformer protections, tap changer, breaker, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. .  
ALTALINK 23-Aug-21 10:00 26-Aug-21 18:00 3.33 Days
Continuous		 258s T1, 138kV Bus 1 & 862L - GOI, 258s T1 (258s Dow Hydro Carbons), 862L (166s Dow Chemical Fort Saskatchewan - 258s Dow Hydro Carbons) T2: maintain, doble, fix leaks, 258s5 adjust, 258s152 PRC maintain  
ATCO 23-Aug-21 10:00 30-Aug-21 15:00 7.21 Days
Continuous		 7L32, 7L32 (813s Little Smoky - 862s South Bezanson) Crossarm changing  
ALTALINK 23-Aug-21 12:00 27-Aug-21 18:00 4.25 Days
Continuous		 946L (89s - 38s) - GOI, 946L (38s East Edmonton - 89s Ellerslie) Component Replacements 946L (Str's Range 30-71)  
ATCO 24-Aug-21 08:00 25-Aug-21 16:00 1.33 Days
Continuous		 793S 704, ATC 793s 704 (ATC 793s West Peace River), 7L04 (ATC 793s West Peace River - 839s Daishowa) Complete 704 Maintenance PM,  
BCH 24-Aug-21 08:00 25-Aug-21 18:00 1.42 Days
Continuous		 1L274 (EFT - 1D2L274) EFD T1 station work. Outage scheduled Aug 24 2300 to Aug 25 0300. AESO/AML supplies GRH and FRO AB-BC
SUNCOR 24-Aug-21 08:00 06-Sep-21 17:00 13.38 Days
Continuous		 635PL9-1000 and 635PT-1000 260kV line structure change for line lift; maintenance of 260kV line, transformer, associated equipment and protection  
ATCO 24-Aug-21 08:30 26-Aug-21 16:30 2.33 Days
Continuous		 848S 905 905 BKR Maintenance  
ATCO 24-Aug-21 10:00 26-Aug-21 14:00 2.17 Days
Continuous		 7L27 Changing a structure and xarms  
ALTALINK 25-Aug-21 07:00 25-Aug-21 19:00 12 Hours
Daily		 13s T2 & 138kV Portion of 13s – GOI Replace 13s JBDC3 with new junction box. DC from the JB supplies 13s101, 13s452, 13s152, 13s552, 13s808N and 13s815W.  
ALTALINK 25-Aug-21 07:00 26-Aug-21 07:00 24 Hours
Continuous		 263s 138kV bus 1, T1, 718L, 870L GOI, 870L (262s Rocky Mountain House - 263s Strachan), 718L (250p Bighorn Plant - 263s Strachan), 263s T1 (263s Strachan) 24hour outage to replace 263s1,138kv motor operated disconnect switch, qty 24 string glass insulators to be changed out.  
BCH 25-Aug-21 08:00 25-Aug-21 16:00 8 Hours
Continuous		 1L274 (B1s BCH Natal - 1D1L274) structure refurbishment AB-BC
ATCO 26-Aug-21 08:00 26-Aug-21 17:00 9 Hours
Continuous		 9L59, 9L59 (801s Anderson - 972s Tinchebray) Change Angle Pole  
ATCO 26-Aug-21 08:00 03-Sep-21 17:00 8.38 Days
Continuous		 740S 700BS2, 740s 144kV Floating Bus (740s H.R.Milner) 740S 770BS2 outage  
BCH 26-Aug-21 09:00 27-Aug-21 17:00 1.33 Days
Continuous		 2L113 (B1s Natal - B2s Cranbrook) conductor repair AB-BC
EPCOR 28-Aug-21 07:00 29-Aug-21 19:00 1.5 Days
Continuous		 TX1 @ Bellamy E814S Bellamy TX1 Oil Clean up and inspection, Doble Bellamy TX1 PT  
EPCOR 30-Aug-21 07:00 30-Aug-21 17:00 10 Hours
Continuous		 LDS4 @ Lambton E803S, 803S EPCOR Lambton, EP 803s L2402 (EP 803s Lambton), EP 803s L2405 (EP 803s Lambton) LDS4 Disconnect Maintenance  
EPCOR 30-Aug-21 07:00 03-Sep-21 17:00 4.42 Days
Continuous		 Dome TX2 Bushing Replacement, 665s T2 (665s Dome) Replace 240kV Bushings (1007378)  
ATCO 30-Aug-21 08:00 02-Sep-21 17:00 3.38 Days
Continuous		 7L91, 7L91 (715s Leming Lake - 826s Marguerite Lake) Clearance Mitigation GOI on 7L91 HOP on 7L66  
ALTALINK, ENMAX 30-Aug-21 09:00 01-Sep-21 17:00 2.33 Days
Continuous		 28.80L(42s - Enmax sub #28) GOI, 28.80L (42s Sarcee - ENMAX 28) Migrate and commission all 42s28 (652) & L6-28.80L at 42s Sarcee associated line protections, recloser, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. .  
ATCO 30-Aug-21 09:00 02-Sep-21 16:00 3.29 Days
Continuous		 7L113, 7L113 (853s Ring Creek - 930s Arcenciel) Time Domain Line Protection Project for circuit modifications required to install new relays at Ring Creek 853S & Arcenceil 930S Substations.  
ALTALINK 30-Aug-21 09:15 03-Sep-21 17:45 4.35 Days
Continuous		 170L (632s - 799s) GOI, 170L (632s Russell - 799s Coleman) Fire Mitigation; Structure Replacements Strs 48-54 AB-BC
ATCO 30-Aug-21 11:00 10-Sep-21 16:00 11.21 Days
Continuous		 840S CONVERTER 6 x 25 kV breaker maintenance, replace station controller, leak repair 901T  
ALTALINK, EPCOR 30-Aug-21 12:00 03-Sep-21 18:00 4.25 Days
Continuous		 947L (89s - E987s) - GOI, 947L (89s Ellerslie - 987s Clover Bar) Component Replacements 947L (Str's Range 2-88)  
ALTALINK 31-Aug-21 08:30 01-Sep-21 16:30 1.33 Days
Daily		 370s T3 (TX18307) GOI Clean up oil spill and repair leak.  
EPCOR 01-Sep-21 07:00 02-Sep-21 17:00 1.42 Days
Continuous		 Summerside S/S TX1 Bay, 657s T1 (657s Summerside) Isolate Summerside TX1 Bay to cut over control, alarms, status to new RTU  
ALTALINK 01-Sep-21 12:30 01-Sep-21 16:30 4 Hours
Daily		 17s49 (17s717W-262s) - Advice, 717L (17s Benalto - 262s Rocky Mountain House) Trip test  
ALTALINK 02-Sep-21 08:45 02-Sep-21 16:15 7.5 Hours
Daily		 908L (89s) - OOS Breaker open on 908L for TPR work.  
ALTALINK 03-Sep-21 07:00 03-Sep-21 18:00 11 Hours
Daily		 861L (258s - 71s) - GOI Replacing strain insulators on 861L @ 258s  
EPCOR 06-Sep-21 07:00 07-Sep-21 17:00 1.42 Days
Continuous		 Summerside S/S TX2 Bay, 657s T2 (657s Summerside) Isolate Summerside TX2 Bay to cut over controls, alarms, status to new RTU  
BCH 06-Sep-21 09:00 06-Sep-21 19:00 10 Hours
Continuous		 1L274 (48s Pocaterra - Britt Creek) Station equipnment inspection AB-BC
ATCO 06-Sep-21 10:00 13-Sep-21 15:00 7.21 Days
Continuous		 7L32, 7L32 (811s Clairmont Lake - 862s South Bezanson) Crossarm changing  
ALTALINK 07-Sep-21 07:45 08-Sep-21 16:45 1.38 Days
Continuous		 1083L (288s - 63s) GOI Fix 63s1083 MOD  
ENMAX, ALTALINK 07-Sep-21 08:00 07-Sep-21 18:00 10 Hours
Continuous		 7.84L. 36.81L. 36.1TR. 36.3TR. 36PT138-Z31., 7.84L (ENMAX 7 - ENMAX 36), 36.81L (44s Bearspaw - ENMAX 36), 36.1TR (ENMAX 36), 36.3TR (ENMAX 36) Fall Substation Washing  
ATCO 07-Sep-21 08:30 09-Sep-21 16:50 2.35 Days
Continuous		 925S 902T, 925s 902T (925s Green Stocking) 902T maintenance  
ATCO 07-Sep-21 08:30 26-Sep-21 17:30 19.38 Days
Continuous		 2029S BUILDING VALVE HALL, 2075S BUILDING VALVE HALL, 13L50 (DC LINK), 13L50 (2029s Heathfield - 2075s Newell) Valve Hall Inspections
- Valve Hall Camera Repairs
- LOP work		  
ALTALINK, ENMAX 07-Sep-21 09:00 09-Sep-21 17:00 2.33 Days
Continuous		 693L (42s - Enmax sub # 10) GOI, 693L (42s Sarcee - ENMAX 10) Migrate and commission all 42s693 (1452) & L5-693L at 42s Sarcee associated line protections, recloser, POW, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN.  
ALTALINK, EPCOR 07-Sep-21 09:00 10-Sep-21 18:00 3.38 Days
Continuous		 947L (89s - E987s) - GOI, 947L (89s Ellerslie - 987s Clover Bar) Component Replacements 947L (Str's Range 2-88)  
ALTALINK 07-Sep-21 09:15 10-Sep-21 17:45 3.35 Days
Continuous		 170L (632s - 799s) GOI, 170L (632s Russell - 799s Coleman) Fire Mitigation; Structure Replacements Strs 48-54 AB-BC
ALTALINK 07-Sep-21 09:30 09-Sep-21 17:00 2.31 Days
Continuous		 17s T3 TX18814 - GOI SCADA alarm/control upgrade for T3, s389, s2852, Tie in new 138B3 'B' CT cont  
ALTALINK 08-Sep-21 07:00 14-Sep-21 18:00 6.46 Days
Continuous		 801L (62s-294s) - GOI, 801L (62s Brazeau - 294s Brazeau Outlet Works) Replace 801L Str 4, 15, 94 and 97 for urgent line clearance mitigation.  
CMH 08-Sep-21 08:00 16-Sep-21 17:00 8.38 Days
Continuous		 T15 (MH69s-1 Power Plant Switchyard) rung T15 north T15 segment upgrade phase 4C  
ALTALINK 08-Sep-21 10:00 08-Sep-21 13:00 3 Hours
Daily		 893L (312s-I112s-I806s-103s) OOS Open 893L for 312s MPLS upgrade.  
ENMAX, ALTALINK 10-Sep-21 08:00 10-Sep-21 16:00 8 Hours
Continuous		 50L. 21.2TR. 138KV PT @ Bearspaw. 21 CAP. 21PT138-Z31, 50L (44s Bearspaw Plant - ENMAX 21), 21.2TR (ENMAX 21) Fall Substation Washing  
ALTALINK 13-Sep-21 07:00 17-Sep-21 17:00 4.42 Days
Continuous		 511s T30 & SVC Plus - GOI, AML 511s T30 (AML 511s Crossings), AML 511s SVC Plus (AML 511s Crossings) Doble T30, SVC Plus maintenance, MSR re-wiring.  
ALTALINK 13-Sep-21 07:30 17-Sep-21 13:00 4.23 Days
Continuous		 63s 138kV North Bus & T3 GOI, 63s T1 (63s Red Deer), 63s 24 (63s Red Deer), 63s 26 (63s Red Deer), 63s T3 (63s Red Deer), 63s 51 (63s Red Deer), 426L (63s Red Deer - 194s South Red Deer) Wire CT contributions for new 138kV bus protections and complete trip testing  
ENMAX 13-Sep-21 08:00 13-Sep-21 16:00 8 Hours
Continuous		 25B240-D131 HV Breaker maintenance 25B240-D131  
ALTALINK 13-Sep-21 08:00 15-Sep-21 16:00 2.33 Days
Continuous		 510s AC Filter 14 - GOI, 510s ACF14 (510s Sunnybrook) Annual Filter Bank outage and inspections  
ATCO 13-Sep-21 08:00 20-Sep-21 16:00 7.33 Days
Continuous		 9L07, 951S 905, 951S 906, 9L07 (951s Thickwood - 2011s Dawes), 951s 905 (951s Thickwood Hills), 951s 906 (951s Thickwood Hills) Cut in CT/'PT/SCADA circuits to the new RAS relays  
ATCO, ALTALINK 13-Sep-21 08:00 20-Sep-21 17:00 7.38 Days
Continuous		 7L77, 7L77 (395s North Holden - 709s Vegreville) GOI on 7L77 from 7L77D1 to 395S Holdon change arms insulators  
ATCO, ALBIAN, SHELL 13-Sep-21 08:30 13-Sep-21 12:00 3.5 Hours
Continuous		 919S 906, 847S 901T, 919s 906 (919s Hartley), 847s 901T (847s Muskeg River) PRC005 Trip coil testing, Test and operate 906, 901T @ 847S OOS
 
ATCO 13-Sep-21 08:30 15-Sep-21 16:50 2.35 Days
Continuous		 925S 901T 901T maintenance  
ALTALINK, ENMAX 13-Sep-21 09:00 15-Sep-21 17:00 2.33 Days
Continuous		 35.81L (42s - Enmax sub # 35) GOI, 35.81L (42s Sarcee - ENMAX 35) Migrate and commission all 42s35 (352) & L3-35.81L at 42s Sarcee associated line protections, recloser, POW, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. .  
BCH 13-Sep-21 09:00 17-Sep-21 17:00 4.33 Days
Continuous		 2L294 (A.A. Lambert - Cranbrook) disconnect switch inspections AB-BC
ATCO, ALBIAN 13-Sep-21 12:00 13-Sep-21 16:00 4 Hours
Continuous		 919S 908, 847S 902T, 919s 908 (919s Hartley), 847s 902T (847s Muskeg River) PRC005 Trip coil testing. Test and operate 908 847S 902T OOS,  
ALTALINK, EPCOR 13-Sep-21 12:00 14-Sep-21 18:00 30 Hours
Continuous		 921L (71s-E987s) & 71s 240kV West Bus -, 921L (71s Lamoureux - 987s Clover Bar) Component Replacements on dead end glass on 921L, and Str's 41 & 72  
ALTALINK 13-Sep-21 12:00 16-Sep-21 18:00 3.25 Days
Continuous		 861L (258s - 71s) - GOI Components insulator replacements (Str's Range 3-15)  
ALTALINK 13-Sep-21 12:00 26-Sep-21 18:00 13.25 Days
Continuous		 37s T6 (Tx 18309) - GOI, 37s T6 (37s North Calder) Maintenance, doble and leak repairs. PRC5 work.  
SUNCOR 14-Sep-21 08:00 27-Sep-21 17:00 13.38 Days
Continuous		 635PL9-1001 and 635PT-1001 260kV line structure change for line lift; maintenance of 260kV line, transformer, associated equipment and protection  
ATCO 14-Sep-21 13:30 14-Sep-21 16:30 3 Hours
Continuous		 828S 703, 7L133, 7L133 (786s High Level - 828s Sulphur Point) PRC-005 - TRIP COIL TESTING - BREAKER 703 @ 828S

703 OOS for duration of work under T&O for trip coil testing.		  
ALTALINK, EPCOR 15-Sep-21 07:00 16-Sep-21 18:00 1.46 Days
Continuous		 920L (71s - E557s) - GOI, 920L (71s Lamoureux - 557s Castle Downs) Component Replacements on 920L Str's Range ( 52D-100 )  
ENMAX, ALTALINK 15-Sep-21 12:00 15-Sep-21 18:00 6 Hours
Continuous		 21.80L. 20.82L. 60S100. 21.1TR. 21.4TR, 21.80L (42s Sarcee - ENMAX 21), 20.82L (ENMAX 20 - ENMAX 21), 21.1TR (ENMAX 21), 21.4TR (ENMAX 21) Fall Substation Washing  
ALTALINK, ENMAX 16-Sep-21 09:15 17-Sep-21 17:15 1.33 Days
Daily		 42s7 (7.82L) GOI, 7.82L (42s Sarcee - ENMAX 7) PRC 1st Trip & Maintenance  
ALTALINK 17-Sep-21 13:00 20-Sep-21 17:00 3.17 Days
Continuous		 63s 240kV North Bus & T1 GOI, 63s T1 (63s Red Deer), 63s 24 (63s Red Deer), 63s 152 (63s Red Deer), 63s 452 (63s Red Deer), 63s 752 (63s Red Deer), 63s 2652 (63s Red Deer) Wire CT contributions for new 138kV bus protections and complete trip testing  
BCH 18-Sep-21 09:00 25-Sep-21 17:00 7.33 Days
Continuous		 5L92 (Cranbrook - Selkirk) insulator replacement AB-BC
ATCO 19-Sep-21 08:30 23-Sep-21 15:00 4.27 Days
Continuous		 790S 703T, 790s 703T (790s Poplar Hill) 703T main
704 top up low pole with SF6		  
ATCO 19-Sep-21 09:00 23-Sep-21 17:00 4.33 Days
Continuous		 790S 704, 790S 703T Replace 1 phase on 790S 704, 790S 703T maintenance  
ATCO 20-Sep-21 08:00 23-Sep-21 16:00 3.33 Days
Continuous		 951S 900BS2, 951S 908, 951S 903, 951S 906, 951s 903 (951s Thickwood Hills), 951s 906 (951s Thickwood Hills), 951s 908 (951s Thickwood Hills) 951S construction for 9L162 & 9L193 addition
AESO should be notified of any changes to below workplan:

Jan 20, 2021 – Feb 20, 2021
Isolation pts: 908B,909A
Impact: BKR 908 OOS
Scope of work: Demo bus & install 909A & 909B
Feb 21, 2021 – Feb 23, 2021
Expand to isolation pts:903B, 906B,908B
Impact: BKR 903,BKR 906, 900BS2 OOS
Scope of work: Make connections to 909A & 912A		  
ATCO 20-Sep-21 08:00 28-Sep-21 16:00 8.33 Days
Continuous		 12L44 Suncor Capacity increase project
Cut in new CT and PT circuit extension to the new RAS relays, T&O Line Terminal Open (LTO) on 1206, 1207, and 12L44D1 @ 939S APL Livock and 1244D1, 1205, 1206, 1201TA, and 901TA @ 951S APL Thickwood. Complete commissioning of RAS relays, end-to-end tests including output to Thickwood RAS		  
ALTALINK, ATCO 20-Sep-21 12:30 23-Sep-21 17:30 3.21 Days
Continuous		 650s T3 & SVC - GOI, 650s T3 (650s Hansman Lake), 650S SVC (650s Hansman Lake) Maintenance on SVC. T3 maintenance, doble Schedued By: Tyler Schiltroth Requested By: MAPS North Contact #: Issue to: Jory Schell Contact #:403-318-4758  
ATCO 21-Sep-21 08:30 22-Sep-21 16:30 1.33 Days
Continuous		 848S 906 906 BKR Maintenance  
ENMAX, ALTALINK 21-Sep-21 12:00 21-Sep-21 16:00 4 Hours
Continuous		 23.80L. 23.4TR, 23.80L (74s Janet - ENMAX 23), 23.4TR (ENMAX 23) Fall Substation Washing  
ATCO 22-Sep-21 09:00 23-Sep-21 17:00 1.33 Days
Continuous		 790S 702, 7L22 790S 702 maintenance, 7L22 open ended  
ATCO 24-Sep-21 08:00 26-Sep-21 16:00 2.33 Days
Continuous		 951S 900BS1, 951s 1201T (951s Thickwood Hills), 951s 920C (951s Thickwood) 951S construction for 240kv expansion - 9L162 & 9L193 addition
Connect 910A to 900BS1
Impact: 900BS1 OOS, BKR 901 OOS, BKR 904 OOS, BKR 907 OOS, 920C OOS		  
ALTALINK 25-Sep-21 06:15 29-Sep-21 17:45 4.48 Days
Continuous		 121s23N GOI, 121s 23N (121s Brooks) 121s23N Protection and control replacement.  
EPCOR 27-Sep-21 07:00 01-Oct-21 17:00 4.42 Days
Continuous		 SDS2L @ Cloverbar E987S, 987s T2 (987s Clover Bar) Substation Manual Disconnect Switches LCR - Clover Bar SDS2L
- SST2 Outage		  
EPCOR 27-Sep-21 07:00 12-Nov-21 17:00 46.46 Days
Continuous		 Victoria TX5, EP 511s Victoria T5 (EP 511s Victoria) Victoria TX5 regasketing  
ALTALINK 27-Sep-21 07:30 01-Oct-21 14:00 4.27 Days
Continuous		 63s 138kV South Bus & T4 GOI, 63s T4 (63s Red Deer), 63s T2 (63s Red Deer), 63s 25 (63s Red Deer), 63s 51 (63s Red Deer), 63s 427 (63s Red Deer), 63s 648 (63s Red Deer), 427L (63s Red Deer - 247s Piper Creek), 648L (63s Red Deer - 580s Sylvan Lake) Wire CT contributions for new 138kV bus protections and complete trip testing  
BCH 27-Sep-21 08:00 27-Sep-21 18:00 10 Hours
Continuous		 1L274 (48s Pocaterra - Britt Creek) BCK station work AB-BC
ENMAX, ALTALINK 27-Sep-21 08:00 17-Oct-21 16:00 20.33 Days
Continuous		 7.82L, 7.82L (42s Sarcee - ENMAX 7) HW 8 relocation. Line relocation at 101 street.. Phasing required.  
BCH 27-Sep-21 09:00 08-Oct-21 17:00 11.33 Days
Continuous		 2L293 (Nelway - Selkirk) structure replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK 27-Sep-21 12:00 17-Oct-21 18:00 20.25 Days
Continuous		 320P T6 – GOI, 320p T6 (320p Keephills) T6 Maintenance, leaks, CT replacement, Model 11 Relay replacements.  
ATCO 27-Sep-21 14:00 04-Oct-21 12:00 6.92 Days
Continuous		 850S 701T, 850s 701T (850s Rainbow Cogen) Perform maintenance testing on the following equipment:
850S 701T
850S 701T Protective Relays
850S RB4 Switchgear breakers
791S BKR 459		  
ALTALINK 28-Sep-21 08:00 03-Oct-21 18:00 5.42 Days
Continuous		 62s T5 (Tx 18580) - GOI 62sT5 PRC5 doble, maintenance, buck indicator, gas monitor failure, Connect IDD, LA base insulators, leak from H1, LTC push buttons replace for MR  
ATCO 29-Sep-21 08:00 01-Oct-21 16:00 2.33 Days
Continuous		 9L59, 9L59 (801s Anderson - 972s Tinchebray) TransAlta GARDEN PLAIN PROJECT
Line 9LA59 tie-in to Garden Plain Sub		  
ATCO 29-Sep-21 08:00 01-Oct-21 16:00 2.33 Days
Continuous		 801S 903, 801S 902, 9L59, 9L59 (801s Anderson - 972s Tinchebray) TransAlta GARDEN PLAIN PROJECT
Relay Settings changes		  
ATCO 29-Sep-21 08:00 01-Oct-21 16:00 2.33 Days
Continuous		 972S 901, 972S 902, 9L59, 9L59 (801s Anderson - 972s Tinchebray) TransAlta GARDEN PLAIN PROJECT
Relay Settings Changes		  
CMH 01-Oct-21 08:00 03-Oct-21 16:00 2.33 Days
Continuous		 MHS9 T11 (MHS9 Power Plant) install new PT  
ATCO 01-Oct-21 08:00 05-Oct-21 16:00 4.33 Days
Continuous		 757S 911, 9L79, 757s 9L79D1 (757s Battle River) Replace Breaker operating mech's on 911  
ATCO 01-Oct-21 09:00 05-Oct-21 16:30 4.31 Days
Continuous		 9L79, 755S 902, 755S 9L79 CHANNEL A TP FAIL, 755S 9L79 CHANNEL B TP FAIL, 755S 9L79 Protection Relay, 757s 9L79D1 (757s Battle River) Protection upgrade to 9L79 relays, testing of MODs @755s. PRC005 at the 757s Battle River end on Breaker 911  
ALTALINK 01-Oct-21 14:00 04-Oct-21 17:00 3.13 Days
Continuous		 63s 240kV South BUS & T2 GOI, 63s T2 (63s Red Deer), 63s 352 (63s Red Deer), 63s 652 (63s Red Deer), 63s 952 (63s Red Deer), 63s 2752 (63s Red Deer) Wire CT contributions for new 138kV bus protections and complete trip testing  
EPCOR 04-Oct-21 07:00 06-Oct-21 17:00 2.42 Days
Continuous		 1201 Bay @ Genesee 330P, 330p 1201 (330p Genesee) 1201 Maintenance and CT Doble  
EPCOR 04-Oct-21 07:00 15-Oct-21 17:00 11.42 Days
Continuous		 240CV5 @ Victoria E511S and CastleDowns E557S, CV5 (EP 511s Victoria - 557s Castle Downs) CV5 Manhole Inspections  
ALTALINK 04-Oct-21 07:00 15-Oct-21 17:00 11.42 Days
Continuous		 CV5 (E511s-E557s) EPCOR - Info Epcor CV5 Manhole Inspections  
ATCO 04-Oct-21 08:00 08-Oct-21 16:00 4.33 Days
Continuous		 720S 902T 902T leak mitigation and transformer maintenance  
ATCO, ALTALINK 04-Oct-21 08:00 08-Oct-21 17:00 4.38 Days
Continuous		 7L77, 7L77 (395s North Holden - 709s Vegreville) GOI on 7L77 from 7L77D1 to 395S Holdon change arms insulators  
ATCO 04-Oct-21 08:00 18-Oct-21 17:00 14.38 Days
Continuous		 9L939, 9L939 (77s Sagitawah - 809s Louise Creek) Louise Creek Rebuild project

Wiring for 905/906BF relays.
CT ratio changes.
Relay programming.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ALTALINK 04-Oct-21 09:00 07-Oct-21 14:00 3.21 Days
Continuous		 39s T1 & 240kV Bus 1 - GOI Replace 240kV CTs associated with 39s26. Repair 39s25.  
ALTALINK 04-Oct-21 09:30 06-Oct-21 16:30 2.29 Days
Continuous		 42s Cap Bank 3 (C3) GOI, 42s 76 (42s Sarcee), 42s C3 (42s Sarcee) Migrate and commission all Cap bank C3 & 42S76 (2252) associated protections, breakers, breaker fail, POW alarms, status, controls, metering and remote access to new RTU and LAN.  
ALTALINK 04-Oct-21 11:00 08-Oct-21 13:00 4.08 Days
Continuous		 61s 138kV Bus 1 (T1, 202L, 836L) - GOI Replacing 61s13 and strain insulators on 836L  
ALTALINK 04-Oct-21 12:15 08-Oct-21 17:45 4.23 Days
Continuous		 48s887X (887L) GOI, 887L (48s Pocaterra - BCH Britt Creek) Install breaker failure protection for breaker 252 AB-BC
ALTALINK 07-Oct-21 07:30 07-Oct-21 18:00 10.5 Hours
Daily		 48s Station & 777L (48s - 245s) GOI, 777L (48s Pocaterra - 245s Seebe) Install breaker failure protection for breaker 252  
ATCO 11-Oct-21 08:00 18-Oct-21 16:00 7.33 Days
Continuous		 9L23, 848S 905, 848S 906, 9L23 (848s Ruth Lake - 977s Salt Creek), 848s 906 (848s Ruth Lake), 848s 905 (848s Ruth Lake) Cut in new CT and PT circuit extension to the new RAS relays, complete SCADA terminations  
BCH 11-Oct-21 09:00 05-Nov-21 17:00 25.33 Days
Continuous		 2L112 (Boundary - Nelway) oil containment install, BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK 11-Oct-21 09:30 13-Oct-21 18:00 2.35 Days
Continuous		 1206L (89s-12s) - GOI Scope of work includes maintenance on structures 2, 7, 16, 31, 48, 50, 51, 52, 55, 77 and 78.  
EPCOR 12-Oct-21 07:00 12-Oct-21 17:00 10 Hours
Continuous		 DDS4 and TX2 @ Dome E665S, 665s DDS4 (665s Dome), 665s T2 (665s Dome) DDS4 maintenance  
EPCOR 12-Oct-21 07:00 14-Oct-21 17:00 2.42 Days
Continuous		 330p 1204 (330p Genesee), 330p 1205 (330p Genesee) 1204 Bay Doble, G2 Arrestor Doble, G2 Zone Relay Maintenance  
ALTALINK, ENMAX 12-Oct-21 09:00 14-Oct-21 17:00 2.33 Days
Continuous		 42s7.82 (42s - Enmax Sub #7) Advice, 7.82L (42s Sarcee - ENMAX 7) Migrate and commission all 42s7 (1552) & L15-7.82L at 42s Sarcee associated line protections, recloser, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. Install and commission new SCADA meter.  
ALTALINK 13-Oct-21 07:00 13-Oct-21 18:00 11 Hours
Daily		 903L (17s-320p) - GOI, 903L (17s Benalto - 320p Keephills) Asset Management request for crew to hold GOI and escort Acuren to inspect welds on 903L66  
ALTALINK 14-Oct-21 07:00 16-Oct-21 18:00 2.46 Days
Continuous		 1212L (89s-12s) - GOI Scope of work includes maintenance on structures 31, 42, 46, 71 and 76  
ALTALINK 14-Oct-21 08:15 15-Oct-21 15:45 31.5 Hours
Continuous		 368s 138kV Bus1 (T1, C1, C2, 879L) GOI, 879L (244s Bowmanton - 368s Burdett), 368s C1 (368s Burdett), 368s C2 (368s Burdett), 368s T1 (368s Burdett) install/commission new protections (rattlesnake ridge)  
ALTALINK 15-Oct-21 07:15 18-Oct-21 17:45 3.44 Days
Continuous		 820L (254s - 315s - 67s) GOI, 820L (254s Coaldale - 820AL tap), 820L (67s Stirling - 820AL tap) Scope of work includes maintenance on structures 160, 161, 168, 175, 176, 177, 179, 187, 190, 197 and 198  
EPCOR 15-Oct-21 17:00 16-Oct-21 17:00 24 Hours
Continuous		 72kV Bus 1 and 2 @ Cloverbar E987s and Namao, 987s Cloverbar 72kV Bus 1, 987s Cloverbar 72kV Bus 2 Arrestor Support Replacement, CDS4 repair, Bus 1/2 doble, CN10 Line Arrestor doble  
ALTALINK 16-Oct-21 08:15 17-Oct-21 15:45 31.5 Hours
Continuous		 368s 138kV Bus2 (T2, C1, C2, 612L, 722L), 722L (107s Westfield - 368s Burdett), 612L (336s Fincastle - 368s Burdett), 368s C1 (368s Burdett), 368s C2 (368s Burdett), 368s T2 (368s Burdett) install/commission new protections (rattlesnake ridge)  
ALTALINK 17-Oct-21 07:00 18-Oct-21 18:00 1.46 Days
Continuous		 1209L (89s-E330p) - GOI Scope of work includes maintenance on structures 57, 59, 62, 67 and 68  
ENMAX 18-Oct-21 08:00 21-Oct-21 16:00 3.33 Days
Continuous		 833L 12B138-833L CT Replacement  
ATCO 18-Oct-21 08:00 26-Oct-21 16:00 8.33 Days
Continuous		 12L41 Suncor Capacity increase Project
Cut in new CT and PT circuit extension to the new RAS relays, T&O Line Terminal Open (LTO) on 1206, 1207, and 12L41D1 @ 939S APL
Livock and @ 510S Sunnybrook (Altalink). Complete commissioning of RAS relays, end-to-end tests including output to Thickwood RAS		  
BCH 18-Oct-21 09:00 21-Oct-21 17:00 3.33 Days
Continuous		 5L94 (Cranbrook - 102s Langdon) NERC PM AB-BC
ALTALINK 18-Oct-21 09:00 29-Oct-21 18:00 11.38 Days
Continuous		 1201L (520s - B2s) GOI, 1201L (520s Bennett - BCH Cranbrook) components-structure range 383-464 AB-BC
MONTANA 18-Oct-21 09:00 29-Oct-21 18:00 11.38 Days
Continuous		 MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
ALTALINK 18-Oct-21 09:30 19-Oct-21 16:30 31 Hours
Continuous		 42s70 GOI, 42s 70 (42s Sarcee) Migrate and commission all 42s70 (1052) at 42s Sarcee associated protections, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. Project PM: Golaleh Rahimi Issue to: Jesse Soonias Contact #: 403-606-8152  
ALTALINK 18-Oct-21 10:05 25-Oct-21 17:30 7.31 Days
Continuous		 520s552 GOI 520s552 Replace "A Phase" pole, & Corona Ring Bent Replacement  
ALTALINK 18-Oct-21 11:00 21-Oct-21 18:00 3.29 Days
Continuous		 89s T1 & 240kV West Bus 1 - GOI Replace 240kV PTs 89s80 & 89s90  
ALTALINK, Lethbridge 19-Oct-21 08:00 19-Oct-21 13:00 5 Hours
Continuous		 667L (146s Lethbridge MacDonald - 370s North Lethbridge), 146s 667 (146s Lethbridge McDonald) test trip and breaker fail trip  
ATCO 19-Oct-21 08:00 01-Nov-21 17:00 13.38 Days
Continuous		 9L05, 9L05 (809s Louise Creek - 813s Little Smoky) Louise Creek Rebuild project
Wiring for 904/905BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
EPCOR 20-Oct-21 07:00 22-Oct-21 17:00 2.42 Days
Continuous		 C2404 and C2406 @ Cloverbar E987S, 987s C2404 (987s Clover Bar), 987s C2406 (987s Clover Bar) 240CVT 85/86/87 and C2404 Bay CT's Doble  
ATCO 20-Oct-21 09:00 20-Oct-21 17:00 8 Hours
Continuous		 811S 709, 7L39 811S 709 partial maintenance  
ALTALINK 21-Oct-21 07:00 21-Oct-21 18:00 11 Hours
Daily		 913L (338s - 69s) - GOI, 913L (69s North Barrhead - 338s Cherhill) Crews performing mtce. on Structure #913L124  
EPCOR 25-Oct-21 07:00 29-Oct-21 17:00 4.42 Days
Continuous		 LSD2 @ Lambton E803S Lambton LDS2 LCR  
ENMAX 25-Oct-21 08:00 28-Oct-21 16:00 3.33 Days
Continuous		 832L 12B138-832L CT Replacement  
ATCO 25-Oct-21 08:00 01-Nov-21 16:00 7.33 Days
Continuous		 848S 901T, 848s 901T (848s Ruth Lake) Complete cut in CT/'PT/SCADAcircuits to the new RAS relays  
BCH 25-Oct-21 09:00 29-Oct-21 17:00 4.33 Days
Continuous		 5L51 (Custer - Ingledow) insulator replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ATCO 25-Oct-21 09:00 11-Nov-21 15:30 17.31 Days
Continuous		 757S 704, 757S 704B, 757S 704PT, 757s 704 (757s Battle River)
PRC005 work on 704 Breaker, 704T Maintenance
PRC005 work on 704 Breaker		  
ALTALINK 25-Oct-21 11:00 28-Oct-21 18:00 3.29 Days
Continuous		 89s T2 & 240kV East Bus 2 - GOI Replace 240kV PTs 89s91. Maintainance on 89s8, 89s16, 89s32.  
ALTALINK, EPCOR 25-Oct-21 12:00 28-Oct-21 18:00 3.25 Days
Continuous		 908L (89s-E816s) - GOI, 908L (89s Ellerslie - 816s Petrolia) Component replacements and fire mitigation on 908L Str's Range 200-232  
EPCOR 25-Oct-21 12:00 28-Oct-21 18:00 3.25 Days
Continuous		 ALTALINK - 908L - DE-ENERGIZE LINE Component replacements and fire mitigation on 908L Str's Range 200-232  
EPCOR, ALTALINK 26-Oct-21 07:00 29-Oct-21 17:00 3.42 Days
Continuous		 TX1 and 1059L @ East Industrial E52S and East Edmonton 38S and Lambton E803S, 1059L (38s East Edmonton - EP 803s Lambton), 52s T1 (52s East Industrial) TX1 Tap Changer Maintenance, 1059L CT and Arrestor Doble, EDS1 Maintenance  
ALTALINK, Lethbridge 27-Oct-21 08:00 27-Oct-21 13:00 5 Hours
Daily		 667L (146s Lethbridge MacDonald - 370s North Lethbridge), 813L (146s Lethbridge MacDonald - 241s Lethbridge Uplands) energize new distribution transformer  
BCH 27-Oct-21 08:00 27-Oct-21 18:00 10 Hours
Continuous		 1L274 (48s Pocaterra - Britt Creek) BCK station work AB-BC
ALTALINK 01-Nov-21 07:00 04-Nov-21 18:00 3.46 Days
Continuous		 121s 25kV BUS 1 GOI, 121s T5 (121s Brooks) Replace 121s38 Switch Glass. Migrate 25kV Bus 1 PT distribution to new building.  
EPCOR 01-Nov-21 07:00 05-Nov-21 17:00 4.42 Days
Continuous		 LDS5 @ Lambton E803S Lambton LDS5 LCR  
ATCO 01-Nov-21 08:00 03-Nov-21 17:00 2.38 Days
Continuous		 740S 701T, 740S 702T, 740S 703T, 740s 701T (740s H.R.Milner), 740s 702T (740s H.R.Milner), 740s 703T (740s H.R.Milner) maintenance  
Lethbridge 01-Nov-21 08:00 04-Nov-21 16:00 3.33 Days
Continuous		 667L ( 146S) Air break and switch function test and maintance  
BCH 01-Nov-21 09:00 05-Nov-21 17:00 4.33 Days
Continuous		 5L52 (Custer - Ingledow) insulator replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK 01-Nov-21 09:30 20-Nov-21 17:00 19.35 Days
Continuous		 17s 138kV Bus 4 & T2 TX18477 - GOI Replace 138kv Bus 4 bus prots, Replace breaker fails on s92, s85, s848X Replace s85 sync check, Replace line protections on 848L, Tie in new 138B3 'B' CT cont, and Tie in new 138B3 'B' CT cont  
ALTALINK 01-Nov-21 12:00 04-Nov-21 18:00 3.25 Days
Continuous		 908L (38s-E52s-89s) - GOI, 908L (38s East Edmonton - 89s Ellerslie) Component replacements and fire mitigation on Str's Range 233-298  
EPCOR 01-Nov-21 12:00 04-Nov-21 18:00 3.25 Days
Continuous		 ALTALINK - 908L(89s-E52s-38s) - DE-ENERGIZE LINE Component replacements and fire mitigation on Str's Range 233-298  
ATCO 08-Nov-21 08:00 15-Nov-21 16:00 7.33 Days
Continuous		 848S 902T, 848s 902T (848s Ruth Lake) Cut in new CT and PT circuit extension to the new RAS relays, complete SCADA terminations.  
EPCOR, ALTALINK 08-Nov-21 09:30 10-Nov-21 16:00 2.27 Days
Continuous		 930L, 930L (37s North Calder - Poundmaker) Line Maintenance  
ALTALINK 08-Nov-21 12:00 10-Nov-21 18:00 2.25 Days
Continuous		 908L (38s-E52s-89s) - GOI Component replacements and fire mitigation on Str's Range 233-298  
ALTALINK 08-Nov-21 12:00 10-Nov-21 18:00 2.25 Days
Continuous		 1059L (38s-E52s-E803s) - RB RB for component replacements and fire mitigation on 908L Str's Range 233-298  
ATCO, ALTALINK 12-Nov-21 08:00 14-Nov-21 17:00 2.38 Days
Continuous		 7L129, 7L129 (526s Buffalo Creek - 7LA129 tap) GOI 7L129D3 to 526S Buffalo Creek Reroute Transmission Line around water  
ATCO 13-Nov-21 08:00 14-Nov-21 17:00 1.38 Days
Continuous		 740S 701T, 740S 702T, 740S 703T, 740s 701T (740s H.R.Milner), 740s 702T (740s H.R.Milner), 740s 703T (740s H.R.Milner) maintenance  
ATCO 14-Nov-21 08:00 29-Nov-21 17:00 15.38 Days
Continuous		 9L40, 9L40 (732s Mitsue - 809s Louise Creek) Louise Creek Rebuild project
Wiring for 903/904BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF protections.		  
EPCOR 15-Nov-21 07:00 19-Nov-21 17:00 4.42 Days
Continuous		 1058L and LDS6 @ Lambton E806S and Summerside E657S 1058L Line Maintenance and Lambton LDS6 LCR  
ALTALINK 15-Nov-21 11:15 25-Nov-21 15:45 10.19 Days
Continuous		 370s47 GOI, 370s 1252 (370s North Lethbridge), 370s 47 (370s North Lethbridge), 968L (138s Windy Flats - 370s North Lethbridge) 370s N.Lethbridge 240kV Breaker (370s47) replacement  
ALTALINK 15-Nov-21 12:00 18-Nov-21 18:00 3.25 Days
Continuous		 905L (37s - 19s) - GOI, 905L (19s Wabamun - 37s North Calder) Component replacements and fire mitigation(Str's Range 905L( 2-180)  
EPCOR, ALTALINK 22-Nov-21 09:30 26-Nov-21 17:00 4.31 Days
Continuous		 1059L, 1059L (38s East Edmonton - EP 803s Lambton) Line Maintenance  
ALTALINK 22-Nov-21 12:00 25-Nov-21 18:00 3.25 Days
Continuous		 905L (37s - 19s) - GOI, 905L (19s Wabamun - 37s North Calder) Component replacements and fire mitigation(Str's Range 905L( 2-180)  
ALTALINK 22-Nov-21 12:30 26-Nov-21 17:30 4.21 Days
Continuous		 74s103 and 74s102 (affect C3 and C4) GOI, 74s C3 (74s Janet), 74s C4 (74s Janet) 74s C4 relay replacement  
EPCOR, ALTALINK 29-Nov-21 09:30 01-Dec-21 16:00 2.27 Days
Continuous		 930L, 930L (37s North Calder - Poundmaker) Line Maintenance  
ALTALINK 29-Nov-21 10:00 29-Nov-21 12:00 2 Hours
Daily		 17s43 (17s1652) - Advice Trip test from 17s85 BF Replacement  
ALTALINK 29-Nov-21 12:00 02-Dec-21 18:00 3.25 Days
Continuous		 905L (37s - 19s) - GOI, 905L (19s Wabamun - 37s North Calder) Component replacements and fire mitigation(Str's Range 905L( 2-180)  
ALTALINK 29-Nov-21 12:30 29-Nov-21 14:30 2 Hours
Daily		 17s23 (17s3) - Advice Trip test from 17s85 BF replacement  
ALTALINK 29-Nov-21 15:00 29-Nov-21 17:00 2 Hours
Daily		 17s39 (17s9) - Advice Trip test from 17s85 BF Replacement  
ATCO 30-Nov-21 08:00 14-Dec-21 17:00 14.38 Days
Continuous		 9L02, 9L02 (809s Louise Creek - 813s Little Smoky) Louise Creek Rebuild project
Wiring for 903/910BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF protections.		  
ALTALINK 30-Nov-21 10:00 30-Nov-21 12:00 2 Hours
Daily		 17s34 (17s4) - Advice Trip test from 17s85 BF Replacement  
ALTALINK 30-Nov-21 12:30 30-Nov-21 14:30 2 Hours
Daily		 17s59 (17s13) - Advice Trip test from s85 BF  
ALTALINK 30-Nov-21 15:00 30-Nov-21 17:00 2 Hours
Daily		 17s79 (C1) - Advice Trip test from s85 BF  
ATCO 06-Dec-21 08:00 13-Dec-21 16:00 7.33 Days
Continuous		 9L74, 888S 905, 888S 906, 9L74 (888s Dover - 960s Birchwood Creek), 888s 905 (888s Dover), 888s 906 (888s Dover) Cut in new CT and PT circuit extension to the new RAS relays, complete SCADA terminations.  
ALTALINK 06-Dec-21 12:00 09-Dec-21 18:00 3.25 Days
Continuous		 905L (37s - 19s) - GOI, 905L (19s Wabamun - 37s North Calder) Component replacements and fire mitigation(Str's Range 905L( 2-180)  
ALTALINK 07-Dec-21 07:15 23-Dec-21 18:45 16.48 Days
Continuous		 887L/1L274 (48s) - BCH Advice transmission refurbishment. Advice needed by BC Hydro on 48s38. AB-BC
BCH 07-Dec-21 08:00 23-Dec-21 18:00 16.42 Days
Continuous		 1L274 (48s Pocaterra - Britt Creek) transmission refurbishment AB-BC
ALTALINK 07-Dec-21 15:00 07-Dec-21 18:00 3 Hours
Daily		 17s49 (17s717W-262s) - Advice, 717L (17s Benalto - 262s Rocky Mountain House) Trip test  
ALTALINK 08-Dec-21 08:00 08-Dec-21 11:00 3 Hours
Daily		 17s46 (17s2852- 17s T3) - Advice Trip test from new s92 breaker fail and s757N breaker fail  
ALTALINK 13-Dec-21 09:00 14-Dec-21 18:00 1.38 Days
Continuous		 789L (A898s - 602L1 - 789L192A) - GOI Maintenance on Structures #77 & 78.  
ATCO 17-Jan-22 08:00 24-Jan-22 16:00 7.33 Days
Continuous		 9L84, 934S 905, 934S 906, 9L84 (934s Black Fly - 977s Salt Creek), 934s 905 (934s Blackfly), 934s 906 (934s Blackfly) Cut in new CT and PT circuit extension to the new RAS relays, complete SCADA terminations.  
ATCO, CNRL 27-Jan-22 08:00 07-Feb-22 17:00 11.38 Days
Continuous		 75-PLH-902, 75-PLH-902 (838s Horizon Mining - 849s Joslyn) ATCO 9L32-9L66 CNRL- Horizon Project
Disconnect existing 75-PLH-902 from Horizon substation 75
Connect new bus Horizon substation 75 (former 75-PLH-902 bay)to new 838S-900BS1
Reroute and connect 9L137 (former 75-PLH-902) to new 838S and energize
Commission 87L/900BS1 protection, end-to-end testing
Upgrade 21B/9L137 line protection @ 849S Joslyn
Commission line protection, SCADA and end-to-end testing, BF/DTT to 838S		  
ATCO, CNRL 08-Feb-22 08:00 19-Feb-22 17:00 11.38 Days
Continuous		 75-PLH-901, 75-PLH-901 (838s Horizon Mining - 849s Joslyn) ATCO 9L32-9L66 CNRL- Horizon Project
Disconnect existing 75-PLH-901 from Horizon substation 75
Connect new bus Horizon substation 75 (former 75-PLH-901 bay) to new 838S-900BS2
Reroute and connect 9L155 (former 75-PLH-901) to new 838S and energize
Commission 87L/900BS1 protection, end-to-end testing
Upgrade 21B/9L155 line protection @ 849S Joslyn
Commission line protection, SCADA and end-to-end testing, BF/DTT to 838S		  
ATCO, ALTALINK 14-Feb-22 08:00 14-Feb-22 18:00 10 Hours
Continuous		 7L65, 7L77, 7L77 (395s North Holden - 709s Vegreville), 7L65 (709s Vegreville - 710s Vermilion) String over 7L65 and 7L77  
ATCO 20-Feb-22 08:00 23-Feb-22 17:00 3.38 Days
Continuous		 9L66, 9L66 (847s Muskeg River - 849s Joslyn Creek) ATCO 9L32-9L66 CNRL- Horizon Project
Disconnect existing line 9L66 at tap point and connect new line segment to 838S Horizon Expansion
Disconnect existing 9L66 from Joslyn 849S
Commissioning upgrade - relay settings @ 847S		  
ATCO 24-Feb-22 08:00 27-Feb-22 17:00 3.38 Days
Continuous		 9L32, 9L32 (849s Joslyn Creek - 2005s Secord) ATCO 9L32-9L66 CNRL- Horizon Project
Disconnect existing line 9L32 at tap point and connect new line segment to 838S Horizon Expansion
Disconnect existing 9L32 from Joslyn 849S
Commissioning upgrade - relay settings @ 2005S		  
ATCO 01-Mar-22 08:00 03-Mar-22 17:00 2.38 Days
Continuous		 9L46, 9L46 (932s Pemukan - 959s Lanfine) Sharp Hills Wind Farm Project
Outage for structure foundations work directly under 9L46		  
ATCO 14-Mar-22 08:00 15-Mar-22 17:00 1.38 Days
Continuous		 766S 901T, 766s 901T (766s Nevis) Sharp Hills Wind Farm Project
Installation of new RAS panel at 766S Nevis		  
ATCO, ALTALINK 22-Mar-22 07:00 22-Mar-22 17:00 10 Hours
Continuous		 7L77, 7L77 (395s North Holden - 709s Vegreville) 7L65 Rebuild Project  
EPCOR 28-Mar-22 07:00 01-Apr-22 17:00 4.42 Days
Continuous		 1098L @ Jasper Terminal E805S and Poundmaker Jasper 1098L VT LCR
1007295 WO: 037069		  
ATCO 09-Apr-22 08:00 15-Apr-22 17:00 6.38 Days
Continuous		 9L46, 9L46 (932s Pemukan - 959s Lanfine) Sharp Hills Wind Farm Project
Outage for Line termination to 363S Sedalia on 9L46		  
EPCOR 11-Apr-22 07:00 06-May-22 17:00 25.42 Days
Continuous		 P2401 @ Petrolia E816S Petrolia P2401 LCR
1007155 WO: 036932		  
ATCO 02-May-22 08:00 15-May-22 00:17 12.68 Days
Continuous		 7L01, 7L01 (813s Little Smoky - 881s Sturgeon) 813S Little Smoky Rebuild
BKR 711 and 712 P&C wiring, remove old panel 8G, set up new panel 7P2, prep work
Relay programming and functionality
Commission control, alarms and status		  
EPCOR 09-May-22 07:00 03-Jun-22 17:00 25.42 Days
Continuous		 P2406 @ Petrolia E816S Petrolia P2406 LCR
1007155 WO: 038105		  
ATCO 16-May-22 08:00 29-May-22 17:00 13.38 Days
Continuous		 7L46, 7L46 (813s Little Smoky - 845s Big Mountain) 813S Little Smoky Rebuild
Replace 705CT and 706CT junction boxes
705, 706 P&C wiring, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 30-May-22 08:00 12-Jun-22 17:00 13.38 Days
Continuous		 7L45, 7L45 (813s Little Smoky - 845s Big Mountain) 813S Little Smoky Rebuild813S Little Smoky Rebuild
BKR 703 and 704 P&C wiring, remove old panel 7G, set up new panel 7P4, prep work
Relay programming and functionality
Commission control, alarms and status		  
EPCOR 06-Jun-22 07:00 30-Jun-22 17:00 24.42 Days
Continuous		 P2404 @ Petrolia E816S Petrolia P2404 LCR
1007156 WO: 037002		  
ATCO 13-Jun-22 08:00 26-Jun-22 17:00 13.38 Days
Continuous		 7L54, 7L54 (794s Valleyview - 813s Little Smoky) 813S Little Smoky Rebuild813S Little Smoky Rebuild
BKR 703 and 704 P&C wiring, remove old panel 7G, set up new panel 7P4, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 15-Jun-22 07:00 28-Jul-22 17:00 43.42 Days
Continuous		 972S 900BS2, 9L16, 9L16 (755s Cordel - 972s Tinchebray), 972s 240kV Bus 900BS2 (972s Tinchebray) Outage on 9L16 to cut the line over to the new bay  
ATCO 29-Jun-22 07:00 01-Jul-22 17:00 2.42 Days
Continuous		 766S 701, 766S 901T, 766s 901T (766s Nevis), 766s 701 (766s Nevis) RAS modifications for the Pattern Lanfine WAGF project  
ATCO 12-Jul-22 07:00 16-Jul-22 17:00 4.42 Days
Continuous		 7L224, 774S 701, 7L224 (650s Hansman Lake - 774s Monitor), 774s 701 (774s Monitor) RAS modifications for the Pattern Lanfine WAGF project  
ATCO 25-Jul-22 08:00 07-Aug-22 17:00 13.38 Days
Continuous		 7L40, 7L40 (733s Simonette - 813s Little Smoky) 813S Little Smoky Rebuild
BKR 709 and 710 P&C wiring, remove old panels 3G and 4G, set up new panel 7P1, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 27-Jul-22 06:00 28-Jul-22 17:00 1.46 Days
Continuous		 972S 900BS2, 9L16, 9L16 (755s Cordel - 972s Tinchebray), 972s 240kV Bus 900BS2 (972s Tinchebray) Outage on 9L16 to cut the line over to the new bay  
ATCO 27-Jul-22 07:00 31-Jul-22 17:00 4.42 Days
Continuous		 7L760, 767S 702, 7L760 (767s Oyen - 7L760D2), 767s 702 (767s Oyen) RAS modifications for the Pattern Lanfine WAGF project  
ATCO 29-Jul-22 07:00 03-Aug-22 17:00 5.42 Days
Continuous		 9L177, 9L177 (620s Goldeye - 972s Tinchebray) Installing new 240Kv Bay (connect 907B to BUS 1) for 620S Goldeye substation connection  
ATCO 08-Aug-22 08:00 21-Aug-22 17:00 13.38 Days
Continuous		 7L32, 7L32 (813s Little Smoky - 862s South Bezanson) 813S Little Smoky Rebuild
BKR 701 and 702 P&C wiring, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 22-Aug-22 08:00 29-Aug-22 16:00 7.33 Days
Continuous		 766S 901T, 766s 901T (766s Nevis) Joss Jenner 2 Power Project Connection
Complete CT, PT, P&C cutover, commission
relays and DTT to 770S Three Hills (option 1) or 1-114S
Ghost Pine (option 2)		  
ATCO 05-Sep-22 08:00 24-Sep-22 17:00 19.38 Days
Continuous		 813S 901T, 813s 901T (813s Little Smoky) 813S Little Smoky Rebuild
Remove panels 3K,4K - install new panel 9T1 - BKR 901, 701, 705, 718 P&C wiring, prep work
Replace 500PT disconnect assembly
Relay programming and functionality
Commission control, alarms and status		  
ATCO 05-Sep-22 08:00 30-Sep-22 16:00 25.33 Days
Continuous		 972S 900BS2, 972s 240kV Bus 900BS2 (972s Tinchebray) CETO project  
ATCO 26-Sep-22 08:00 19-Oct-22 17:00 23.38 Days
Continuous		 813S 902T, 813s 902T (813s Little Smoky) 813S Little Smoky Rebuild
Remove panels 1K,2K - install new panel 9T2 - BKR 904, 710, 711, 713, 717 P&C wiring, prep work
Replace cap bank protection relays
Replace 501PT disconnect assembly
Relay settings update for capacitor banks 714C, 715C, 716C
Relay programming and functionality
Commission control, alarms and status		  
ATCO 22-Oct-22 07:00 02-Nov-22 17:00 11.42 Days
Continuous		 7L129, 7L129 (710s Vermilion - 918s Bauer) Re stringing conductor  
ATCO 24-Oct-22 08:00 06-Nov-22 17:00 13.42 Days
Continuous		 9L11, 9L11 (813s Little Smoky - 834s Wesley Creek) 813S Little Smoky Rebuild
Remove panels 5H,6H - install new panel 9P3 - BKR 905 and 906 P&C wiring, prep work
Relay programming and functionality
Commission control, alarms and status		  
EPCOR 31-Oct-22 07:00 04-Nov-22 17:00 4.42 Days
Continuous		 1164L @ Petrolia E816S and Riverview Petrolia 1164L VT LCR
1007295 WO: 037070		  
ATCO 07-Nov-22 08:00 20-Nov-22 17:00 13.38 Days
Continuous		 9L05, 9L05 (809s Louise Creek - 813s Little Smoky) 813S Little Smoky Rebuild
Remove panels 5H,6H - install new panel 9P3 - BKR 905 and 906 P&C wiring, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 21-Nov-22 08:00 04-Dec-22 17:00 13.38 Days
Continuous		 9L02, 9L02 (809s Louise Creek - 813s Little Smoky) 813S Little Smoky Rebuild
Remove panels 5H,6H - install new panel 9P3 - BKR 905 and 906 P&C wiring, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 05-Dec-22 08:00 18-Dec-22 17:00 13.38 Days
Continuous		 813S SVC, 813s SVC (813s Little Smoky) 813S Little Smoky Rebuild
Cutover new filter bank relays, P&C wiring
Relay programming and functionality
Commission control, alarms and status		  
ATCO 15-Dec-22 07:00 23-Dec-22 17:00 8.42 Days
Continuous		 730S 702, 730S 704, 730s 702 (730s Rycroft), 7L73 (730s Rycroft - 829s Boucher Creek), 730s 704 (730s Rycroft) SVC addition and 144 kv bus rebuild.  
ATCO 21-Mar-23 08:00 22-Mar-23 17:00 1.38 Days
Continuous		 7L53, 7LA53, 7L53 (700s Bonnyville - 706s Irish Creek) Cold Lake Area Energy Centre Project
7LA53 (New Line T-Tap)
1064S Garnier Lake Sub (Customer)

Build 6km 7LA53 144kV from T-Tap to 1064S Garnier Lake Substation.
Remote end protection upgrades		  
ATCO 27-Mar-23 08:00 30-Mar-23 17:00 3.38 Days
Continuous		 7L91, 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		  

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: 2021-07-05   9:49:07 AM


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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