Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2021-10-16

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

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Owner From To Duration Element Scheduled Activity Affected Intertie
ALTALINK 06-Sep-21 07:00 20-Oct-21 20:00 44.54 Days
Continuous		 62s 11 (62s Brazeau) maintenance  
ALTALINK 10-Sep-21 12:30 01-Nov-21 16:30 52.17 Days
Continuous		 320p 2089 (320p Keephills) maintenance  
EPCOR 13-Sep-21 07:00 15-Nov-21 17:00 63.46 Days
Continuous		 T3 (Poundmaker) 240 kV ring re-configuration (P1649)  
EPCOR 27-Sep-21 07:00 12-Nov-21 17:00 46.46 Days
Continuous		 EP 511s Victoria T5 (EP 511s Victoria), CV5 (EP 511s Victoria - 557s Castle Downs) regasketing Victoria T5  
ENMAX, ALTALINK 27-Sep-21 08:00 24-Oct-21 16:00 27.33 Days
Continuous		 7.82L (42s Sarcee - ENMAX 7) line relocation at 101 street  
ALTALINK 28-Sep-21 09:30 17-Oct-21 18:00 19.35 Days
Continuous		 320p T6 (320p Keephills), 320p PS2 (320p Keephills), 320p 2652 (320p Keephills), 320p 2852 (320p Keephills) maintenance, leaks, CT replacement, model 11 relay replacements  
ATCO 04-Oct-21 08:01 24-Oct-21 17:00 20.37 Days
Continuous		 9L02 (809s Louise Creek - 813s Little Smoky), 809s 903 (809s Louise Creek), 809s 910 (809s Louise Creek) Louise Creek rebuild project  
SUNCOR 06-Oct-21 08:00 21-Oct-21 17:00 15.38 Days
Continuous		 635PL7-1004 (635EDD-1001 - 635EDD-1002), 635PT-1036 (635EDD-1001), 635EDD-1001 635-752-651 (635EDD-1001), 635EDD-1001 635-752-652 (635EDD-1001), 635EDD-1001 635-752-653 (635EDD-1001) dia 5 equipment outage at 635EDD-1001  
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
REDDEER, ALTALINK 12-Oct-21 15:00 25-Oct-21 09:00 12.75 Days
Continuous		 209S Timberlands, 209s 768W (209s Timberlands), 464L (87s Gaetz - 209s Timberlands), 768L (209s Timberlands - 217s North Red Deer), 209s T1 (209s Timberlands) City of Red Deer: P&C relay testing and maintenance  
ALTALINK 13-Oct-21 07:00 16-Oct-21 18:00 3.46 Days
Continuous		 927L (102s Langdon - 356s Milo) structure maintenance  
ALTALINK 14-Oct-21 07:00 16-Oct-21 18:00 2.46 Days
Continuous		 1212L (89s-12s) - GOI, 1212L (12s Heartland - 89s Ellerslie) Scope of work includes maintenance on structures 31, 42, 46, 71 and 76  
ALTALINK 17-Oct-21 07:15 19-Oct-21 17:45 2.44 Days
Continuous		 820L (254s - 315s - 67s) GOI, 820L (254s Coaldale - 820AL tap), 820AL (315s Chin Chute - 820L 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  
ALTALINK 18-Oct-21 07:30 22-Oct-21 17:30 4.42 Days
Continuous		 510s ACF14 - GOI, 510s ACF14 (510s Sunnybrook) Replace point on wave relay associated with 510s1452 and ACF14 TX 18882  
Syncrude 18-Oct-21 08:00 18-Oct-21 20:00 12 Hours
Daily		 Significant Outage: T2 Transformer (260/72KV) in D05 Substation Following Circuit Breakers will be operated to isolate T2: 516, 513, 78 Following MOD's will be operated to isolate T1: 516A, 516B, 513A, 513B, 509, 78A, 78B Significant Outage:
T2 Transformer (260/72KV) in D05 Substation

Following Circuit Breakers will be operated to isolate T2: 516, 513, 78

Following MOD's will be operated to isolate T1: 516A, 516B, 513A, 513B, 509, 78A, 78B		  
ALTALINK 18-Oct-21 08:00 29-Oct-21 18:00 11.42 Days
Continuous		 1034L(324s - 244s) GOI (URGENT), 1034L (244s Bowmanton - 324s Cassils) GOI required for P5 Urgent Repair damper scope between structures 82 and 262. *Completion of Damper Replacement CRU scope between Structures 300 & 367 will coincide with this outage.  
ALTALINK 18-Oct-21 08:55 18-Oct-21 18:30 9.58 Hours
Daily		 941L(M120 - Hay Lake) GOI Annual maintenance routine - in conjunction with south bound and 1201L outage. The following maintenance items will be completed; K-Line Line maintenance  
ALTALINK 18-Oct-21 08:55 18-Oct-21 18:30 9.58 Hours
Continuous		 M120s Station GOI Annual maintenance routine - in conjunction with south bound and 1201L outage. The following maintenance items will be completed; RTU outage as needed to complete ORION change out and complete alarm checks to ACC and timer modification as needed… station will be out, PS1; diverter, filters, exciter tank conservator bladder, switch maintenance, Relay PMs for site… operating lockouts and AC station service outage for testing ATS  
MONTANA 18-Oct-21 09:00 18-Oct-21 18:00 9 Hours
Continuous		 MATL (120s Picture Butte - Montana) annual maintenance routine AB-MATL
MONTANA 18-Oct-21 09:00 18-Oct-21 18:00 9 Hours
Continuous		 MATL (120s Picture Butte - Montana) annual maintenance routine AB-MATL
ATCO 18-Oct-21 09:00 20-Oct-21 16:15 2.3 Days
Continuous		 888S 906, 888S 906 Recloser, 888s 906 (888s Dover) Breaker Maintenance 906  
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.  
ALTALINK 18-Oct-21 10:00 18-Oct-21 17:30 7.5 Hours
Daily		 67s T2(TX18703) GOI, 67s T2 (67s Stirling) investigate and replace failing LTC controller  
ATCO 18-Oct-21 10:00 20-Oct-21 12:00 2.08 Days
Continuous		 800S 701, 7L75, 7L75 (ATC 793s West Peace River - 800s Friedenstal) 800S Friedenstal Breaker 701 Maintenance  
ALTALINK 18-Oct-21 10:05 25-Oct-21 17:30 7.31 Days
Continuous		 520s552 GOI, 520s 552 (520s Benett) 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, 89s T1 (89s Ellerslie), 289s 240kV Bus 1 (289s Saunders Lake) Replace 240kV PTs 89s80 & 89s90  
ATCO 18-Oct-21 12:00 01-Nov-21 11:00 13.96 Days
Continuous		 7L59, 7L59 (789s Keg River - 7L59 tap) Replace crossarms and replace poles  
ALTALINK 18-Oct-21 17:25 23-Oct-21 18:30 5.05 Days
Continuous		 M120s and 941L(M120 - Hay Lake) GOI Annual maintenance routine - in conjunction with south bound and 1201L outage. The following maintenance items will be completed; Rising Edge -RTU outage as needed to complete ORION change out and complete alarm checks to ACC and timer modification as needed… station will be out -PS1; diverter, filters, exciter tank conservator bladder -switch maintenance -Relay PMs for site… operating lockouts… -AC station service outage for testing ATS KLINE -line maintenance  
MONTANA 18-Oct-21 18:00 23-Oct-21 18:00 5 Days
Continuous		 MATL (120s Picture Butte - Montana) annual maintenance routine AB-MATL
ALTALINK 19-Oct-21 07:00 23-Nov-21 18:00 35.5 Days
Continuous		 39s1052 - GOI, 39s 1052 (39s Bickerdike) GOI to allow for the addition of new breaker 39s1152 and associated equipment. New 39s1152 is Being installed between 39s11A, and 39s31, Part of 240kV Expansion cascade project. and Add new 39s973 MOD which will remain normal open until the 973L is relocated to this diameter.Add New 39s56 switch (P2032)  
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  
ALTALINK 19-Oct-21 09:15 20-Oct-21 17:00 31.75 Hours
Continuous		 42s C3 GOI, 42s C3 (42s Sarcee) Techs will require 42sC3 Cap bank OOS to complete PRC005 compliant relay maintenance and trip path verifications.  
ALTALINK 19-Oct-21 09:15 20-Oct-21 17:00 31.75 Hours
Continuous		 42s C3 Advice Techs will require 42sC3 Cap bank OOS to complete PRC005 compliant relay maintenance and trip path verifications.  
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  
ALTALINK 20-Oct-21 09:30 21-Oct-21 17:30 1.33 Days
Continuous		 77s26 - GOI Urgent Replace failed grading capacitors and do an internal inspection on the phase's contacts that had the cap failure  
ATCO 20-Oct-21 12:00 22-Oct-21 17:00 2.21 Days
Continuous		 800S 702, 7L73, 7L73 (730s Rycroft - 800s Friedenstal) 800S Friedenstal Breaker 702 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  
SUNCOR 22-Oct-21 08:00 23-Oct-21 18:00 1.42 Days
Continuous		 29EDD-71 29EDD71; BREAKER FUNCTIONAL TEST REG 5y_A
29-752-4613;29-752-4614;29-752-4621;29-752-4622;29-752-4623
29-752-4624; 29-752-4631; 29-752-4632; 29-752-4633; 29-752-4634
29-752-4641;29-752-4642;29-752-4644
29-752-4651;29-752-4652;29-752-4654		  
ALTALINK 23-Oct-21 17:25 29-Oct-21 19:00 6.07 Days
Continuous		 M120s Station GOI Annual maintenance routine - in conjunction with south bound and 1201L outage. The following maintenance items will be completed; RTU outage as needed to complete ORION change out and complete alarm checks to ACC and timer modification as needed… station will be out, PS1; diverter, filters, exciter tank conservator bladder, switch maintenance, Relay PMs for site… operating lockouts and AC station service outage for testing ATS. KLINE line maintenance  
MONTANA 23-Oct-21 18:00 29-Oct-21 18:00 6 Days
Continuous		 MATL (120s Picture Butte - Montana) annual maintenance routine AB-MATL
ATCO 24-Oct-21 17:01 25-Oct-21 07:59 14.97 Hours
Continuous		 809s 903 (809s Louise Creek) Louise Creek rebuild project  
EPCOR 25-Oct-21 07:00 29-Oct-21 17:00 4.42 Days
Continuous		 LDS2 @ Lambton E803S Lambton LDS2 LCR  
EPCOR, ALTALINK 25-Oct-21 07:00 05-Nov-21 17:00 11.42 Days
Continuous		 1201, 1202, 1238LD @ Genesee 330P, 1238L (330p Genesee - 510s Sunnybrook) Spire #6 and # 7 repair  
ENMAX, ALTALINK 25-Oct-21 08:00 25-Oct-21 16:00 8 Hours
Continuous		 50L. 21.2TR. 138KV PT @ Bearspaw. 21 CAP. 21PT138-Z31, 50L (44s Bearspaw Plant - ENMAX 21) Fall Substation Washing. Original date Sept 10th.  
ENMAX, ALTALINK 25-Oct-21 08:00 28-Oct-21 16:00 3.33 Days
Continuous		 832L, 832L (ENMAX 10 - ENMAX 12) 12B138-832L CT Replacement  
ATCO, ALTALINK 25-Oct-21 08:00 30-Oct-21 17:00 5.38 Days
Continuous		 7L77, 7L77 (395s North Holden - 709s Vegreville) change arms & insulators  
ALTALINK 25-Oct-21 09:00 28-Oct-21 17:00 3.33 Days
Continuous		 5s T2(TX18835) GOI, 5s T2 (5s East Calgary) change conservator bladder  
ATCO 25-Oct-21 09:00 29-Oct-21 17:30 4.35 Days
Continuous		 2029S 500SST1, 2029S 500SST2 Breaker thermal window installs in LV1 & LV2.
One LV will be performed at a time, then the other switched out.
500 kV breakers on transformer primary will be opened for a few moments while opening 501VRA & 502VRA.		  
ALTALINK 25-Oct-21 09:45 03-Nov-21 17:45 9.33 Days
Continuous		 1005L (120s - 356s) GOI, 1005L (120s Picture Butte - 356s Milo) Build new T-tap into new 991s substation (Little Bow). Install/commission new line protections  
ATCO 25-Oct-21 10:00 27-Oct-21 16:00 2.25 Days
Continuous		 790S 702, 7L22, 7L22 (790s Poplar Hill - 7L88 tap), 790s 702 (790s Poplar Hill) 790S 702 maintenance, 7L22 open ended  
ALTALINK 25-Oct-21 11:00 29-Oct-21 15:00 4.17 Days
Continuous		 77s919X (919L) - GOI, 919L (77s Sagitawah - 310p Sundance) Replacement of 77s919x  
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, ALTALINK 25-Oct-21 12:00 28-Oct-21 18:00 3.25 Days
Continuous		 ALTALINK - 908L - DE-ENERGIZE LINE, 908L (89s Ellerslie - 816s Petrolia) Component replacements and fire mitigation on 908L Str's Range 200-232  
ALTALINK 25-Oct-21 12:00 05-Nov-21 17:30 11.23 Days
Continuous		 89s1252 - GOI, 89s 1252 (89s Ellerslie) Replace 89s1252 breaker fail relay  
ALTALINK 26-Oct-21 07:30 26-Oct-21 12:30 5 Hours
Continuous		 151s765 (765L) GOI, 765L (151s Strathmore - 419s Chestermere) Install and commission relays for RAS179 on 765L  
ALTALINK 26-Oct-21 08:30 26-Oct-21 17:30 9 Hours
Daily		 17s85 (T2)- GOI, 17s 85 (17s Benalto), 17s T2 (17s Benalto) Replace 6 grading capacitors on 17s85 breaker like for like. Other maintenance work on the breaker as required,  
ALTALINK 27-Oct-21 07:00 30-Oct-21 18:00 3.46 Days
Continuous		 853L(504s - 853L76A) GOI, 853L (504s Queenstown - 853AL tap) GOI required for Bird Flight Diverter Installation on 853L Structures 282-330  
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  
ATCO 27-Oct-21 09:00 27-Oct-21 17:00 8 Hours
Continuous		 811S 709, 7L39, 7L39 (811s Clairmont Lake - 7L39 tap), 811s 709 (811s Clairmont Lake) 811S 709 partial maintenance  
ALTALINK 28-Oct-21 09:30 01-Nov-21 17:30 4.33 Days
Continuous		 68s T2 and 68s552 GOI, 68s T2 (68s Willesden Green) Tie in new CT circuit for ne A87 protection. Modify Transformer protection relays setting and Test trip to 68s3103 Modify 370s552 Breaker Fail Protection and Test trip to 68s3103  
EPCOR 01-Nov-21 07:00 02-Nov-21 17:00 1.42 Days
Continuous		 240kV Bus 1/2 and 1164L @ Riverview and Petrolia E816S, 1164L (816s Petrolia - EPCOR Riverview) RWDS2 / RWDS3 / RWDS11 adjustments  
Lethbridge, ALTALINK 01-Nov-21 08:00 04-Nov-21 16:00 3.33 Days
Continuous		 667L ( 146S), 667L (146s Lethbridge MacDonald - 370s North Lethbridge) Air break and switch function test and maintance  
SUNCOR 01-Nov-21 08:00 13-Nov-21 18:00 12.46 Days
Continuous		 29EDD-1 260kV North Bus 1 (29EDD-1 Millennium), 29EDD-1 29EDD1s152 (29EDD-1 Millennium), 29EDD-1 29EDD1s452 (29EDD-1 Millennium) preventative maintenance  
ALTALINK 01-Nov-21 08:30 01-Nov-21 13:30 5 Hours
Daily		 320p400 (SSTA & SSTB) - GOI, 320p 400 (320p Keephills) 1st trip and PRC5 maintenance; New C60 breaker fail trip testing on breaker 1552 (320p400)  
ATCO 01-Nov-21 09:00 05-Nov-21 17:30 4.35 Days
Continuous		 2075S 500SST1, 2075S 500SST2 Breaker thermal window installs in LV1 & LV2.
As Each Station service is removed-from and returned-to service the 240Kv breakers will be opened temporarily to allow for isolating the low voltage devices. (2075S 920 & 2075S 921 for 500SST1) & (2075S 904 & 2075S 905 for 500SST2)
One LV will be performed at a time, then the other switched out.		  
ATCO 01-Nov-21 09:00 11-Nov-21 15:30 10.31 Days
Continuous		 757S 704, 757S 704B, 757S 704PT, 757s 704 (757s Battle River) 704T maintenance work and PRC005 work on 704 Breaker  
ALTALINK 01-Nov-21 09:30 20-Nov-21 18:00 19.4 Days
Continuous		 17s 138kV Bus 4 & T2 TX18477 - Advice, 17s 138kV Bus 4 (17s Benalto), 17s T2 (17s Benalto) 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 11:00 04-Nov-21 18:00 3.29 Days
Continuous		 89s T2 & 240kV East Bus 2 - GOI, 89s T2 (89s Ellerslie), 89s Ellerslie 240kV Bus 2 Replace 240kV PTs 89s91. Maintenance on 89s8, 89s16, 89s32. Trip testing from replacement 89s1252 breaker fail relay.  
ALTALINK 01-Nov-21 11:00 10-Nov-21 17:30 9.31 Days
Continuous		 905L (37s - 19s) - GOI, 905L (19s Wabamun - 37s North Calder) Replace 37s77 & 37s79 Switches. Salvage 37s74. Maintenance on 37s76 including first trip testing. Replace grading caps on 37s76. RSLD1 to be implemented after outage is complete.  
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  
ATCO, ALTALINK 02-Nov-21 08:00 11-Nov-21 17:00 9.42 Days
Continuous		 1035L (244s Bowmanton - 2075s Newell), 1035L(244s - A2075s) GOI (URGENT) GOI required for completion of Damper Replacement CRU scope between Structures 300 & 367  
SUNCOR 02-Nov-21 08:00 16-Nov-21 17:00 14.42 Days
Continuous		 635PL9-1001 and 635PT-1001, 635PL9-1001 (2005s Secord - 635EDD-1000) 260kV line structure change for line lift; maintenance of 260kV line, transformer, associated equipment and protection  
ATCO 02-Nov-21 13:00 02-Nov-21 15:00 2 Hours
Continuous		 7L63, 7L63 (780s Lubicon - 812s Norcen) High load crossing  
EPCOR 03-Nov-21 07:00 03-Nov-21 17:00 10 Hours
Continuous		 RWDS12 and 1139L @ Riverview and Harry Smith 367S, 1139L (367s Harry Smith - EPCOR Riverview) RWDS12 adjustment  
ALTALINK 04-Nov-21 08:00 04-Nov-21 13:00 5 Hours
Daily		 89s1952 - GOI, 89s 1952 (89s Ellerslie) Trip testing from replacement 89s1252 breaker fail relay.  
ALTALINK 04-Nov-21 13:00 04-Nov-21 17:30 4.5 Hours
Daily		 89s2252 - GOI, 89s 2252 (89s Ellerslie) Trip testing from replacement 89s1252 breaker fail relay.  
ALTALINK 04-Nov-21 14:30 04-Nov-21 17:00 2.5 Hours
Daily		 245s777X (777L) Advice, 777L (48s Pocaterra - 245s Seebe) Functional Trip Test (245s3E); re T2 protection replacements AB-BC
EPCOR 05-Nov-21 07:00 22-Nov-21 17:00 17.46 Days
Continuous		 Summerside S/S Tx2 Outage, 657s T2 (657s Summerside) Tx2 isolation required for SUBT23 cell install as part of Southeast Expansion Project  
ALTALINK 05-Nov-21 12:00 05-Nov-21 17:00 5 Hours
Daily		 89s1152 (946L) - GOI, 89s 1152 (89s Ellerslie) Trip testing from replacement 89s1252 breaker fail relay. Outage coincides with 277255 89s1252 - GOI and will take 946L OOS.  
ALTALINK 08-Nov-21 07:00 16-Nov-21 18:00 8.46 Days
Continuous		 749L (899s-7L749D3) - GOI, 749L (899s Edgerton - 7LB749 tap) GOI required for Urgent Repair Installation of Clamp Star assemblies on 749L Str 295B - 472  
ENMAX, ALTALINK 08-Nov-21 08:00 11-Nov-21 16:00 3.33 Days
Continuous		 833L, 833L (ENMAX 2 - ENMAX 12) 12B138-833L CT Replacement  
SUNCOR 08-Nov-21 08:00 15-Nov-21 17:00 7.38 Days
Continuous		 635PP-1001, 635EDD-1000 635-952-635PT-1001 (635EDD-1000) Bus-Side Disconnect Repairs Main Sub 635EDD-1000  
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, EPCOR 08-Nov-21 12:00 10-Nov-21 18:00 2.25 Days
Continuous		 908L (38s-E52s-89s) - GOI, 908L (38s East Edmonton - 89s Ellerslie), 908AL (52S East Industrial - 908L tap) Component replacements and fire mitigation on Str's Range 233-298  
ATCO 09-Nov-21 08:00 11-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), 740s 701 (740s H.R. Milner) HR Milner uprate Project  
ALTALINK 10-Nov-21 09:00 10-Nov-21 17:00 8 Hours
Daily		 245s1 (245sT1) GOI, 245s T1 (245s Horseshoe) Functional Trip Test (245s3E); re T2 protection replacements  
ATCO 12-Nov-21 08:00 24-Nov-21 17:00 12.38 Days
Continuous		 740S 700BS2 HR Milner Upgrade Project
740S 770BS2 outage		  
ALTALINK, EPCOR 13-Nov-21 07:00 14-Nov-21 18:00 1.46 Days
Continuous		 1209L (89s-E330p) - GOI, 1209L (89s Ellerslie - 330p Genesee) Scope of work includes maintenance on structures 57, 59, 62, 67 and 68  
ENMAX, ALTALINK 13-Nov-21 08:00 13-Nov-21 18:00 10 Hours
Continuous		 21.80L. 20.82L. 60S100. 21.1TR. 21.4TR, 21.80L (42s Sarcee - ENMAX 21), 20.82L (ENMAX 20 - ENMAX 21) Fall Substation Washing.  
ENMAX 14-Nov-21 08:00 14-Nov-21 16:00 8 Hours
Continuous		 25B240-D131, 25B240-D131 (ENMAX 25) HV Breaker maintenance 25B240-D131  
EPCOR 15-Nov-21 07:00 19-Nov-21 17:00 4.42 Days
Continuous		 1058L and LDS6 @ Lambton E806S and Summerside E657S, 1058L (657s Summerside - EP 803s Lambton) 1058L Line Maintenance and Lambton LDS6 LCR  
EPCOR 15-Nov-21 07:00 19-Nov-21 17:00 4.42 Days
Continuous		 12TC2 and 12BU2 @ Genesee 330P, 330P 12TC2 (330p Genesee) Spire #3 repair  
ENMAX, ALTALINK 15-Nov-21 08:00 16-Nov-21 16:00 1.33 Days
Continuous		 1080L., 1080L (ENMAX 25 - ENMAX 65) 25MD240-1080 Replacement  
ENMAX, ALTALINK 15-Nov-21 08:00 21-Nov-21 16:00 6.33 Days
Continuous		 28.80L., 28.80L (42s Sarcee - ENMAX 28) HPL breaker refurbishments on 28B138-28.80  
BCH 15-Nov-21 09:00 19-Nov-21 17:00 4.33 Days
Continuous		 5L52 (Custer - Ingledow) insulator replacement, BC maintenance does not affect the Alberta ATC AB-BC
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)  
ATCO 15-Nov-21 12:00 29-Nov-21 17:00 14.21 Days
Continuous		 7L59, 7L59 (789s Keg River - 7L59 tap) Replace crossarms and replace poles  
ALTALINK 16-Nov-21 09:00 16-Nov-21 17:00 8 Hours
Daily		 723s252, T2, & 25kV Bus 2 – GOI, 723s 252 (723s Christina Lake), 723s T2 (723s Christina Lake) Replace fuse holder for 723s31. SF6 top up & maintenance on 723s252. Sub checks  
EPCOR 17-Nov-21 07:00 20-Dec-21 17:00 33.42 Days
Continuous		 Poundmaker S/S Tx2 Bay Outage, 1098L bay outage and PM2405 bay outage, 1098L (805s Jasper - Poundmaker), T2 (Poundmaker) Continuation of 240 kV ring re-configuration for WETUP project.

HV bus re-configuration to tie Tx2 in between PM2401 and newly installed PM2405. Outage will provide isolation for HV bus re work and PMDS12 installation.		  
ALTALINK 17-Nov-21 07:15 13-Dec-21 17:45 26.44 Days
Continuous		 225L(225s-313s-67s) GOI, 225AL (313s Raymond Reservoir - 225L tap), 225L (67s Stirling - 225s Magrath) Scope of work includes rebuilding a portion of 225L from structure 241 to structure 281  
ATCO 17-Nov-21 11:00 28-Nov-21 18:00 11.29 Days
Continuous		 930S Synchronous Condenser ABB Rep Repair Investigation  
ENMAX 22-Nov-21 08:00 22-Nov-21 16:00 8 Hours
Continuous		 162.1TR, 162.1TR (162s Beddington), 240kV North Bus (ENMAX 162), 138kV North Bus (ENMAX 162) Relays - Fault Pressure Testing - 240-162.1TR. Lock out relay testing 86-Z43A, 86-T1A, 86-T1B, 86-Z43B, 86-Z31A, 86-Z31B  
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  
EPCOR, ALTALINK 22-Nov-21 09:30 26-Nov-21 17:00 4.31 Days
Continuous		 1238L and 12TC2 @ Genesee 330P, 1238L (330p Genesee - 510s Sunnybrook) Spire #2 Repair  
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 23-Nov-21 07:00 24-Nov-21 17:00 1.42 Days
Continuous		 Summerside S/S Tx1 bay outage, 657s T1 (657s Summerside) Removal of 240 kV bus work for SU2405 bay installation for South East Expansion Project.

Tx1 to be energized from SU2404 breaker during the restoration of this outage with 240 kV bus removed from SUDS2 to SUAB1 for the duration on SU2405 bay installation. Physical bus separation from SUDS2 to SUAB1 to remain upon Tx1 restoration.		  
ALTALINK 23-Nov-21 07:15 25-Nov-21 15:45 2.35 Days
Continuous		 275s T1(Tx18457) GOI, 275s T1 (275s Jenner) Isolation of T1 Tx 18457 to install new Bird mitigation for the secondary side of T1 bus work and new reactor portion.  
ENMAX 23-Nov-21 08:00 23-Nov-21 16:00 8 Hours
Continuous		 162.2TR (162s Beddington) Resolve online monitoring project punch list items. Relays - Fault Pressure Testing - 240-162.2TR, Lock out relay testing 86-Z44A, 86-Z44B, 86-Z32A, 86-Z32B, 86-T2A, 86-T2B  
ATCO 24-Nov-21 08:00 26-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) HR Milner Upgrade project
 
ALTALINK 24-Nov-21 09:00 24-Nov-21 15:30 6.5 Hours
Daily		 42s906N (906L) GOI, 906L (17s Benalto - 42s Sarcee) replace heater  
EPCOR 25-Nov-21 07:00 26-Nov-21 17:00 1.42 Days
Continuous		 Summerside S/S Tx2 Bay Outage and SU2401 bay outage, 657s T2 (657s Summerside), 657s SU2401 (657s Summerside) Continuation of 240 kV ring re-configuration for South East Expansion Project. 240 kV bus to be removed from SUDS2 and SUAB1 in order to make room for SU2405 breaker bay and CVT installation.

Tx1 to be energized from through SU2404 breaker during this outage.		  
ATCO 25-Nov-21 08:00 27-Nov-21 17:00 2.38 Days
Continuous		 7L03, 7L03 (731s Elmworth - 749s Flying Shot) Northstone DG at 731S Elmworth Project  
ALTALINK 25-Nov-21 09:00 25-Nov-21 15:30 6.5 Hours
Daily		 102s7452 GOI replace heater  
ENMAX, ALTALINK 26-Nov-21 12:00 26-Nov-21 16:00 4 Hours
Continuous		 23.80L, 23.80L (74s Janet - ENMAX 23) 23 Sub 138kV DFR Equipment Upgrade  
ATCO 28-Nov-21 18:00 01-Dec-21 18:00 3 Days
Continuous		 930S Synchronous Condenser, 930S 407 ABB Rep Repair Investigation.

Sync Condenser will be offline from November 17 - December 1 (except when in service during T&O). Test and Operate on sync condenser after GOI 2-59836.

Breaker 407 will be operated during test and operate.		  
EPCOR 29-Nov-21 07:00 03-Dec-21 17:00 4.42 Days
Continuous		 1205 @ Genesee 330P, 330p 1205 (330p Genesee) Spire #8 Repair  
EPCOR 29-Nov-21 07:00 11-Feb-22 17:00 74.42 Days
Continuous		 Summerside S/S Tx1 bay outage, 657s T1 (657s Summerside) Continuation of 240 kV ring re-configuration for South East Expansion Project.

Tx1 bay to be isolated for 240 kV bus re-configuration and installation of SU2405, SUDS11 and CVT's.

Upon restoration Tx1 to be energized from SU2404 and a new isolation point of SUDS11 disconnect to remain open.		  
ALTALINK 29-Nov-21 10:00 29-Nov-21 12:00 2 Hours
Daily		 17s43 (17s1652) - Advice, 17s 43 (17s Benalto), 17s 1652 (17s Benalto) 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, 17s 23 (17s Benalto), 17s 3 (17s Benalto) Trip test from 17s85 BF replacement  
ALTALINK 29-Nov-21 15:00 29-Nov-21 17:00 2 Hours
Daily		 17s39 (17s9) - Advice, 17s 39 (17s Benalto), 17s 9 (17s Benalto) Trip test from 17s85 BF Replacement  
ALTALINK 30-Nov-21 09:30 30-Nov-21 15:30 6 Hours
Daily		 324s2152 GOI heater replacement  
ALTALINK 30-Nov-21 10:00 30-Nov-21 12:00 2 Hours
Daily		 17s34 (17s4) - Advice, 17s 34 (17s Benalto), 17s 4 (17s Benalto) Trip test from 17s85 BF Replacement  
ALTALINK 30-Nov-21 12:30 30-Nov-21 14:30 2 Hours
Daily		 17s59 (17s13) - Advice, 17s 13 (17s Benalto), 17s 59 (17s Benalto) Trip test from s85 BF  
ALTALINK 30-Nov-21 15:00 30-Nov-21 17:00 2 Hours
Daily		 17s79 (C1) - Advice, 17s C1 (17s Benalto) Trip test from s85 BF  
ALTALINK, Lethbridge 01-Dec-21 07:15 01-Dec-21 17:45 10.5 Hours
Daily		 370s175 (172L) GOI, 172L (181s Chinook - 370s North Lethbridge) Isolate breaker to complete P&C Cutovers, Remove and Add Trips, Modify Block Close  
ALTALINK, Lethbridge 02-Dec-21 07:15 02-Dec-21 17:45 10.5 Hours
Daily		 370s207X GOI, 207L (111s Coalbanks - 370s North Lethbridge) Isolate breaker to complete P&C Cutovers, Remove and Add Trips, Modify Block Close  
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)  
ATCO 06-Dec-21 12:00 20-Dec-21 17:00 14.21 Days
Continuous		 7L59, 7L59 (789s Keg River - 7L59 tap) Replace crossarms and replace poles.  
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 08-Dec-21 08:00 08-Dec-21 11:00 3 Hours
Daily		 17s46 (17s2852- 17s T3) - Advice, 17s 2852 (17s Benalto), 17s T3 (17s Benalto) Trip test from new s92 breaker fail and s757N breaker fail  
EPCOR 13-Dec-21 07:00 17-Dec-21 17:00 4.42 Days
Continuous		 LDS5 @ Lambton E803S and Hardisty and Strathcona, EP 803s L2403 (EP 803s Lambton), EP 803s L2405 (EP 803s Lambton), EP 803s T3 (EP 803s Lambton), 72LH8 (EP 803s Lambton - EPCOR Hardisty), 72LS24 (EP 803s Lambton - Strathcona) Lambton LDS5 LCR
(Isolates 72LH8 and 72LS24 from Lambton)		  
ATCO 13-Dec-21 08:00 16-Dec-21 12:00 3.17 Days
Continuous		 7L199, 741s 7L199D1 (741s Fox Creek), 7L199 (347s Fox Creek - 741s Fox Creek) Changing X Arms  
ATCO 13-Dec-21 08:00 16-Dec-21 16:00 3.33 Days
Continuous		 7L54, 7L54 (794s Valleyview - 813s Little Smoky) Changing X Arms  
ALTALINK 13-Dec-21 09:00 14-Dec-21 18:00 1.38 Days
Continuous		 789L (A898s - 602L1 - 789L192A) - GOI, 789L (898s Heart Lake - 789BL tap) Maintenance on Structures #77 & 78.  
ALTALINK 14-Dec-21 06:00 15-Dec-21 18:00 1.5 Days
Continuous		 39s T1 & 240B1 & New 240KV - GOI, 39s T1 (39s Bickerdike) GOI on 240B2 to close open point J to new sub expansion equipment  
ATCO 20-Dec-21 08:00 22-Dec-21 16:00 2.33 Days
Continuous		 7L54, 7L54 (794s Valleyview - 813s Little Smoky) Changing X Arms  
ATCO 03-Jan-22 08:00 05-Jan-22 17:00 2.38 Days
Continuous		 7L69, 7L69 (731s Elmworth - 815s Goodfare) Test and Operate 815S 704  
EPCOR 10-Jan-22 07:00 28-Jan-22 17:00 18.42 Days
Continuous		 Poundmaker S/S Tx4 bay outage Continuation of 240 kV ring re-configuration for WETUP project.

Outage will provide isolation for tie in of new Tx4. (P1649)		  
ATCO 10-Jan-22 08:00 13-Jan-22 17:00 3.38 Days
Continuous		 7L07 Project (P2394)  
ATCO 10-Jan-22 09:00 30-Jan-22 17:00 20.33 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.		  
ATCO 17-Jan-22 08:00 19-Jan-22 17:00 2.38 Days
Continuous		 7L22 Elmworth Project  
ALTALINK 20-Jan-22 08:00 22-Jan-22 17:00 2.38 Days
Continuous		 973L (39s-310p) - GOI, 973L (39s Bickerdike - 310p Sundance) Install new 973L Str 2 in the existing line. Install new 1135L3 in the existing 973L line. Install conductor between new Str 2 and 1C to connect 973L in the new alignment. Remove conductor between new 973L2 and 1135L3.  
ALTALINK 23-Jan-22 08:00 25-Jan-22 17:00 2.38 Days
Continuous		 974L (39s-310p) - GOI, 974L (39s Bickerdike - 310p Sundance) Install new 974L Str 2 in the existing line. Install new 1084L Str 3 in the existing 974L line. Install conductor between new 974L Str 2 and 1C to connect 974L in the new alignment. Remove conductor between new 974L2 and 1084L3.  
ATCO, ALTALINK 24-Jan-22 08:00 27-Jan-22 17:00 3.38 Days
Continuous		 7L129, 7L129 (526s Buffalo Creek - 7LA129 tap) GOI 7L129D3 to 526S Buffalo Creek Reroute Transmission Line around water  
ALTALINK, EPCOR 25-Jan-22 07:00 25-Jan-22 18:00 11 Hours
Daily		 920L (71s - E557s) - GOI, 920L (71s Lamoureux - 557s Castle Downs) Maintenance on structure 48  
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		  
ALTALINK 02-Feb-22 07:00 06-Feb-22 18:00 4.46 Days
Continuous		 39s 240kV Bus 2 (39s Bickerdike), 39s 240kV Bus 2 - GOI Install new 973L, 974L and 1168L into A-frames at 39S as part of Cascade Project. New spans to 973L, 974L and 1168L A-frames to cross over 39S 240 kV bus 2.  
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		  
EPCOR 14-Feb-22 07:00 18-Feb-22 17:00 4.42 Days
Continuous		 TX3 @ Jasper Terminal E805S 15kV BUS PT Replacement  
EPCOR 14-Feb-22 07:00 11-Mar-22 17:00 25.42 Days
Continuous		 Summerside S/S Tx2 bay outage, 1057L bay outage and SU2405 bay outage, 657s T2 (657s Summerside) Continuation of 240 kV ring re-configuration for South East Expansion Project.

Outage will provide isolation for HV bus re work and SUDS12 installation.		  
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  
ALTALINK 14-Feb-22 08:00 23-Feb-22 18:30 9.44 Days
Continuous		 39s 138kV B2, T2, 240B2, & 973L - GOI, 39s T2 (39s Bickerdike), 973L (39s Bickerdike - 310p Sundance) Complete relocation of 973L, Complete connection of 1135L Close open point ‘K’,Complete breaker fail, T2 trip testing from/to 39s452, 39s852, 39s1152, 39s29, 39s1752  
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 21-Feb-22 08:00 21-Feb-22 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.		  
ALTALINK 23-Feb-22 17:30 30-Mar-22 15:30 34.88 Days
Continuous		 1084L (39s-1047s) - GOI, 1084L (59s Peigan - 278s Kaiyatree) Complete 1084L Line relay testing between 39s and 1047s  
ALTALINK 24-Feb-22 07:00 24-Feb-22 18:00 11 Hours
Continuous		 310p 240kV B Bus - GOI, 310p 240kV Bus B (310p Sundance) Scope of work includes replacing insulators on structures 310P and 1 on 1046L, we require a GOI on the B bus in order to safely handle the conductor running over the bus work as well as safely set up the equipment inside the 310p Sundance Substation. Required due to proximity for 1046L GOI See also SAP: 277114  
ALTALINK 24-Feb-22 07:00 27-Feb-22 18:00 3.46 Days
Continuous		 1046L (310p-338s) - GOI, 1046L (310p Sundance - 338s Cherhill) Scope of work includes maintenance on structures 310p, 1 ,21, 22, 23, 24, 25, 26, 55, 57, 74, 75, 80, 89, 90, 91, 102, 110, 111, 120 and 121. See also 310p 240kV Bus SAP: 277113 Required due to proximity to 1046L and also SAP: 277115 902L R/B required due to proximity to 1046L  
ALTALINK 24-Feb-22 07:00 05-Mar-22 18:00 9.46 Days
Continuous		 974L (39s-310p) - GOI, 974L (39s Bickerdike - 310p Sundance) Install new 974L Str 2 in the existing line. Install new 1084L Str 3 in the existing 974L line. Install conductor between new 974L Str 2 and 1C to connect 974L in the new alignment. Remove conductor between new 974L2 and 1084L3.  
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		  
EPCOR 28-Feb-22 07:00 04-Mar-22 17:00 4.42 Days
Continuous		 TX1 @ Jasper Terminal E805S Surge Arrestor Replacement  
ALTALINK 01-Mar-22 07:00 08-Mar-22 16:00 7.38 Days
Continuous		 39s T1, 138kV B1, 240B1, 974L, 1084L, 1168L -, 974L (39s Bickerdike - 310p Sundance), 39s T1 (39s Bickerdike) Complete relocation of 974L (close open point ‘L’) Terminate 1084L, Terminate 1168L (close open point ‘M’) Complete breaker fail, T1 trip testing from/to 39s1552, 39s26, 39s33, 39s38, 39s152, 39s1052  
ALTALINK 05-Mar-22 15:30 30-Mar-22 15:30 24.96 Days
Continuous		 1168L (39s-1047s) - GOI Complete 1168L relay testing between 39s and 1047s  
ALTALINK 05-Mar-22 16:00 30-Mar-22 15:30 24.94 Days
Continuous		 1135L (39s-1047s) - GOI Complete 1135L relay testing between 39s and 1047s  
ATCO 14-Mar-22 08:00 15-Mar-22 17:00 1.38 Days
Continuous		 766S 901T, 766s 901T (766s Nevis) Sharp Hills Project
Installation of new RAS panel at 766S Nevis		  
ATCO 14-Mar-22 08:00 01-Apr-22 16:00 18.33 Days
Continuous		 951S 900BS2, 951S 908, 951S 903, 951S 906, 951S 907 951S construction for 9L162 & 9L193 addition
AESO should be notified of any changes to below workplan:

Isolation pts: 908B,909A
Impact: BKR 908 OOS
Scope of work: Demo bus & install 909A & 909B
March 31, 2022 – April 01, 2022
Expand to isolation pts:903B, 906B,908B
Impact: BKR 903,BKR 906, 900BS2 OOS
Scope of work: Make connections to 909A & 912A		  
ALTALINK 14-Mar-22 12:00 17-Mar-22 18:00 3.25 Days
Continuous		 1206L (89s - 12s) - GOI, 1206L (12s Heartland - 89s Ellerslie) Component Replacements on 1206L ( Structure Range 2-193)  
ALTALINK 21-Mar-22 12:00 24-Mar-22 18:00 3.25 Days
Continuous		 1206L (89s - 12s) - GOI, 1206L (12s Heartland - 89s Ellerslie) Component Replacements on 1206L ( Structure Range 2-193)  
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  
ALTALINK 28-Mar-22 12:00 31-Mar-22 18:00 3.25 Days
Continuous		 1212L (89s - 12s) - GOI, 1212L (12s Heartland - 89s Ellerslie) Component Replacements on 1212L ( Structure Range 20-194)  
EPCOR 04-Apr-22 07:00 08-Apr-22 17:00 4.42 Days
Continuous		 1098L @ Jasper Terminal E805S and Poundmaker Jasper 1098L VT LCR
1007295 WO: 037069		  
SUNCOR 04-Apr-22 08:00 07-Apr-22 18:00 3.42 Days
Continuous		 29EDD-65 Edd65Sub 29EDD65 ;29PT-259 SYSTEM;PM 5y line 29PL9-12  
ALTALINK 04-Apr-22 12:00 07-Apr-22 18:00 3.25 Days
Continuous		 1212L (89s - 12s) - GOI, 1212L (12s Heartland - 89s Ellerslie) Component Replacements on 1212L ( Structure Range 20-194)  
ATCO 09-Apr-22 08:00 15-Apr-22 17:00 6.38 Days
Continuous		 9L46, 9L46 (932s Pemukan - 959s Lanfine) Sharp Hills 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, 816s P2401 (816s Petrolia) Petrolia P2401 LCR
1007155 WO: 036932		  
ATCO 11-Apr-22 08:00 12-Apr-22 16:00 1.33 Days
Continuous		 951S 900BS1, 951s 240kV 900BS1 (951s Thickwood Hills), 951s 1201T (951s Thickwood Hills) 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		  
ATCO 12-Apr-22 08:00 15-Apr-22 17:00 3.38 Days
Continuous		 801S 901T, 801s 901T (801s Anderson) WHEATLAND PROJECT
801S Anderson Sub Protection Upgrade		  
ATCO 24-Apr-22 08:00 27-Apr-22 17:00 3.38 Days
Continuous		 766S 901T, 766s 901T (766s Nevis) WHEATLAND PROJECT
766S Nevis Sub Protection Upgrade		  
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, 816s P2406 (816s Petrolia) 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, EP 803s L2404 (EP 803s Lambton) 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 907B and 908A for the installation and commissioning of 907 and 907CT  
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 11-Aug-22 17:00 3.38 Days
Continuous		 9L29, 9L29 (946s Oakland - 963s Coyote Lake) BER Hand Hills Project
P & C circuit cutovers
Commission LTO 908 & 909 52b open status and line
MOD 9L29D2 89b open status @ 946S and LTO 901
open status and line MOD, 9L29D1 open status @ 963S,
end-to-end testing		  
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, 1164L (816s Petrolia - EPCOR Riverview), 816s P2404 (816s Petrolia), 816s P2403 (816s Petrolia) 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 08-Nov-22 08:00 08-Nov-22 17:00 9 Hours
Continuous		 7L32 (813s Little Smoky - 862s South Bezanson) 862S S. Bezanson Substation Rebuild Project, Disconnect and remove 7L32PT2  
ATCO 08-Nov-22 08:00 08-Nov-22 17:00 9 Hours
Continuous		 7L32 (811s Clairmont Lake - 862s South Bezanson) 862S S. Bezanson Substation Rebuild Project, Disconnect and remove 7L32PT3  
ATCO 21-Nov-22 08:00 04-Dec-22 17:00 13.38 Days
Continuous		 9L02, 9L02 (809s Louise Creek - 813s Little Smoky) "Louise Creek Rebuild project - On Oct 24 - Breaker 903 will remain open overnight as this breaker will be part of the following GOI on 9L40 2-50614. Reason: Protection on this breaker is only partially upgraded at this point.
Wiring for 903/910BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF protections."		  
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: 2021-10-06   14:45:54


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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