Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2021-08-07

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 13-Jul-21 17:01 22-Aug-21 17:00 40 Days
Continuous		 9L938 (77s Sagitawah - 809s Louise Creek), 809s 901T (809s Louise Creek), 809s 503R (809s Louise Creek), 809s 504R (809s Louise Creek) Louise Creek rebuild project  
ATCO 26-Jul-21 10:00 09-Aug-21 15:00 14.21 Days
Continuous		 7L32 (813s Little Smoky - 862s South Bezanson) crossarm changing  
ATCO 03-Aug-21 10:00 09-Aug-21 15:00 6.21 Days
Continuous		 7L40 (733s Simonette - 813s Little Smoky) crossarm changes  
SUNCOR, ATCO 04-Aug-21 08:00 14-Aug-21 18:00 10.42 Days
Continuous		 29EDD-1 72kV South Bus (29EDD-1 Millennium), 29EDD-1 260kV South Bus 1 (29EDD-1 Millennium), 29EDD-1 260kV South Bus 2 (29EDD-1 Millennium), 29EDD-1 29EDD1s1052 (29EDD-1 Millennium), 29EDD-1 29EDD1S1452 (29EDD-1 Millennium), 29EDD-1 29EDD1s1852 (29EDD-1 Millennium), 29EDD-1 29EDD1s352 (29EDD-1 Millennium), 29EDD-1 29EDD1s652 (29EDD-1 Millennium), 29PL9-2 (29EDD-1 Millennium - 848s Ruth Lake), 29EDD-1 952-103 (29EDD-1 Millennium), 29EDD-1 952-106 (29EDD-1 Millennium) preventative maintenance  
ALTALINK, EPCOR 05-Aug-21 07:00 15-Aug-21 18:00 10.46 Days
Continuous		 908L (38s East Edmonton - 89s Ellerslie), 908AL (52S East Industrial - 908L tap) replace damaged insulation, jumper strings  
ALTALINK 06-Aug-21 07:15 11-Aug-21 17:45 5.44 Days
Continuous		 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  
ALTALINK 08-Aug-21 08:00 08-Aug-21 17:30 9.5 Hours
Continuous		 74s691 (affect 691L) GOI, 691L (74s Janet - 419s Chestermere), 74s 691 (74s Janet) Replace Breaker 74s691 Grading Capacitors  
BCH 08-Aug-21 08:00 08-Aug-21 18:00 10 Hours
Continuous		 1L274 (Elkford - EFT1D21), 1L274 (Elkford - EFT1D22) Transformer energization AB-BC
EPCOR, ALTALINK 09-Aug-21 07:00 11-Aug-21 17:00 2.42 Days
Continuous		 1044L Zone @ Japser Terminal E805S and Petrolia E816S, 1044L (805s Jasper - 816s Petrolia), 805s J2404 (805s Jasper), 805s J2403 (805s Jasper) 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 (732s Mitsue) 732S 901 Breaker Maintenance  
ATCO 09-Aug-21 08:00 17-Aug-21 17:00 8.38 Days
Continuous		 7L84 -1, 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		  
ENMAX 09-Aug-21 08:00 27-Aug-21 16:00 18.33 Days
Continuous		 7.82L Line relocation at Bow Trail. Phasing required across SW82.  
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  
ALTALINK 09-Aug-21 09:00 10-Aug-21 17:30 1.35 Days
Continuous		 74s2752 GOI, 74s 2752 (74s Janet) Replace Breaker 74s2752 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. .  
ALTALINK 09-Aug-21 10:00 12-Aug-21 16:00 3.25 Days
Daily		 526s T1, VR1 & 25kV Bus 2 - GOI, 526s T1 (526s Buffalo Creek) wiring new CT circuit to new protection and installing 25kV PT on 336L  
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, 900L (17s Benalto - 63s Red Deer) GOI required for Phase Raiser installation on 900L2  
ALTALINK 11-Aug-21 07:00 11-Aug-21 18:00 11 Hours
Daily		 707L, 787L (166s - 787L33), 166s T2/T3 &, 707L (54s Fort Saskatchewan - 166s Dow Chemical Fort Saskatchewan), 787L (166s Dow Chemical Fort Saskatchewan - 787AL tap), 166s T2 (166s Dow Chemical Fort Saskatchewan), 166s T3 (166s Dow Chemical Fort Saskatchewan) 1st trip and PRC5 maintenance on 166s787W, fix broken shroud on CT & mtce. on 166s10/11  
ALTALINK 11-Aug-21 09:00 12-Aug-21 17:30 1.35 Days
Continuous		 74s2852 GOI, 74s 2852 (74s Janet) Replace Breaker 74s2852 Grading Capacitors  
EPCOR 12-Aug-21 07:00 13-Aug-21 17:00 1.42 Days
Continuous		 1045L @ Jasper Terminal E805S, Keephills 320P, Sundance 310P 1045L at Jasper CVT/Arrestor Doble, JDS27/JDS12 Switch Maintenance  
ALTALINK 12-Aug-21 07:15 12-Aug-21 10:45 3.5 Hours
Daily		 850L (525s - 678s) GOI Mobile Connect (470s)  
ATCO 12-Aug-21 08:00 12-Aug-21 11:30 3.5 Hours
Continuous		 2005s 905 Test and Operate. PRC005 Trip coil on Breaker 905  
ATCO 12-Aug-21 08:00 16-Aug-21 17:00 4.38 Days
Continuous		 732S 903, 732s 903 (732s Mitsue) 903 Breaker Maintenance  
ALTALINK 12-Aug-21 08:30 12-Aug-21 17:30 9 Hours
Daily		 19s905 (905L) - GOI, 905L (19s Wabamun - 37s North Calder), 19s 905 (19s Wabamun) Replace grading capacitor on 19s905 240kV breaker.  
ATCO 12-Aug-21 11:45 12-Aug-21 16:30 4.75 Hours
Continuous		 2005s 906 Test and Operate. PRC005 Trip coil on Breaker 906  
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 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.		  
SUNCOR 15-Aug-21 08:00 23-Aug-21 18:00 8.42 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  
SUNCOR, ATCO 15-Aug-21 08:00 30-Aug-21 18:00 15.42 Days
Continuous		 29EDD-1 72kV North Bus (29EDD-1 Millennium), 29EDD-1 260kV North Bus 1 (29EDD-1 Millennium), 29EDD-1 260kV North Bus 2 (29EDD-1 Millennium), 29EDD-1 29EDD1s1152 (29EDD-1 Millennium), 29EDD-1 29EDD1s152 (29EDD-1 Millennium), 29EDD-1 29EDD1s1552 (29EDD-1 Millennium), 29EDD-1 29EDD1s452 (29EDD-1 Millennium), 29EDD-1 29EDD1s952 (29EDD-1 Millennium), 29PL9-1 (29EDD-1 Millennium - 848s Ruth Lake) preventative maintenance  
ALTALINK 15-Aug-21 11:30 18-Aug-21 17:30 3.25 Days
Continuous		 83s T1 GOI Replace 138 kV LA’s, TC filter, 25 kV bushings, and 138 kV bushings on T1  
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) GOI PRC5 1st Trip & Maintenance (SF6)  
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)  
ALTALINK 17-Aug-21 07:00 18-Aug-21 18:00 1.46 Days
Continuous		 787L, 787AL & 906s Station - GOI, 787L (71s Lamoureux - 166s Dow Chemical Fort Saskatchewan) T1: maintain, doble, fix GT, tip up oil, filter motor trouble, rad leak, conservator pipe leak T3: maintain, doble, top up oil, Tx valve leak, TS1 SS sign install. 906s1 needs some adjusting  
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  
SUNCOR 17-Aug-21 08:00 01-Sep-21 17:00 15.38 Days
Continuous		 635PL9-1000 and 635PT-1000 260kV line structure change for line lift; maintenance of 260kV line, transformer, associated equipment and protection  
ALTALINK 19-Aug-21 07:00 19-Aug-21 18:00 11 Hours
Daily		 707L/862L/899L, 166s T1/T2, 258s T1/138k, 707L (54s Fort Saskatchewan - 166s Dow Chemical Fort Saskatchewan), 862L (166s Dow Chemical Fort Saskatchewan - 258s Dow Hydro Carbons), 899L (166s Dow Chemical Fort Saskatchewan - 218s Fort Saskatchewan Co-Gen), 166s T1 (166s Dow Chemical Fort Saskatchewan), 166s T2 (166s Dow Chemical Fort Saskatchewan), 258s T1 (258s Dow Hydro Carbons) 1st trip PRC5 maintenance on 166s862N, fix CT shroud and capacitor mount; 166s899N capacitor mounting kit; T1: replace conservator gauge, fix Hydran monitor warning. 166s1 & 166s24 clean and adjust  
ALTALINK 19-Aug-21 18:00 20-Aug-21 18:00 24 Hours
Continuous		 862L/899L, 166s T1, 258s T1/138kV Bus 1, 166s T1 (166s Dow Chemical Fort Saskatchewan), 862L (166s Dow Chemical Fort Saskatchewan - 258s Dow Hydro Carbons), 899L (166s Dow Chemical Fort Saskatchewan - 218s Fort Saskatchewan Co-Gen), 258s T1 (258s Dow Hydro Carbons) Migrate alarms and controls from the existing SCADA system to the new system. This will include 138kV Bus 1 protection, T1 Protection, breakers 258s252, 258s652, and 258s552 controls and status, MOD 258s862X control and status, and 862L protection alarms.  
ALTALINK 20-Aug-21 18:00 01-Sep-21 18:00 12 Days
Continuous		 862L, 258s T1 & 138kV Bus 1 - GOI, 862L (166s Dow Chemical Fort Saskatchewan - 258s Dow Hydro Carbons), 258s T1 (258s Dow Hydro Carbons), 258s 138kV Bus 1 (258s Dowhydrocarbons) Migrate alarms and controls from the existing SCADA system to the new system. This will include 138kV Bus 1 protection, T1 Protection, breakers 258s252, 258s652, and 258s552 controls and status, MOD 258s862X control and status, and 862L protection alarms. 166s4 switch replacement and strain insulator replacement on 862L @ 258s  
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  
ATCO 22-Aug-21 17:00 30-Aug-21 17:00 8 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 22-Aug-21 17:00 30-Aug-21 17:00 8 Days
Continuous		 809S 911, 809s 911 (809s Louise Creek) Louise Creek Rebuild project Upgrade - 809S 911 BKR Replacement
To be issued once the work on 809S 901T is complete.
On August 30th once the GOI for 809S 902T (2-50617) is issued this permit will be released as it will be within the zone of that GOI		  
SUNCOR 23-Aug-21 08:00 26-Aug-21 18:00 3.42 Days
Continuous		 29PL7-4 (29EDD-65 - 29EDD-71) 29EDD65 ;29PT-260 & 29PL7-4 SYSTEM;PM 5y  
SUNCOR 23-Aug-21 08:00 28-Aug-21 18:00 5.42 Days
Continuous		 29EDD-71, 29EDD-71 Edd71Sub, 29PL7-4 (29EDD-65 - 29EDD-71) 29EDD-71;29PT-241 & 29PL7-4 SYSTEM;5y(A)  
SUNCOR 23-Aug-21 08:00 28-Aug-21 18:00 5.42 Days
Continuous		 29PL7-4 (29EDD-65 - 29EDD-71) 29EDD65, ;29PT-257, & 29PL7-4,
SYSTEMs;PM 5y		  
SUNCOR 23-Aug-21 08:00 28-Aug-21 18:00 5.42 Days
Continuous		 29EDD-65 -1 29EDD65, ;29PT-257, & 29PL7-4,
SYSTEMs;PM 5y		  
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		  
EPCOR, ALTALINK 23-Aug-21 09:30 24-Aug-21 17:00 31.5 Hours
Continuous		 Summerside/Ellerslie S/S 1057L Outage, 1057L (89s Ellerslie - 657s Summerside) Isolate 1057L to cut over controls, status, alarms to new RTU at Summerside  
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. .  
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)  
ALTALINK 23-Aug-21 12:00 27-Aug-21 18:00 4.25 Days
Continuous		 947L (89s - E987s) - GOI Component Replacements 947L (Str's Range 2-88)  
ATCO 23-Aug-21 13:00 23-Aug-21 17:00 4 Hours
Continuous		 809S 901T, 7L19, 7L55, 7L43 Aug 23, 2021 13:00 -15:00 - 144Kv Bus partial outage, 809S 901T OOS, 7L19 OOS, 7L55 OOS 7L43 tied to 7L56 with N.O. 809S 700D1 - 2 Hour outage to remove existing 700PT and Cut in J1 jumper. See attached SLD -Isolation points:809S 700B, 809S 7L43D1, 809S 7L55D1, 809S 7L19D1, 809S 701A  
ATCO 23-Aug-21 15:00 25-Aug-21 09:30 1.77 Days
Continuous		 809S 901T, 7L55, 7L43 Aug 23, 2021 15:00 - Aug 25, 2021 09:30 - 144Kv Bus partial outage, 7L55 OOS, 7L43 tied to 7L56 - Install New 700PT1 - Isolation Points: J1, 7L43D1, 7L55D1 - install and commission new 700PT.
Work will proceed under fair weather conditions only		  
ALTALINK 24-Aug-21 07:15 27-Aug-21 09:45 3.1 Days
Continuous		 428sT2 & 25kV BUS 2 GOI, 428s T2 (428s Namaka) Installation of CT’s for P1932  
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 27-Aug-21 17:00 3.38 Days
Continuous		 635PP-1000 Bus-Side Disconnect Repairs Main Sub 635EDD-1000  
ATCO 24-Aug-21 08:30 26-Aug-21 16:30 2.33 Days
Continuous		 848S 905, 848s 905 (848s Ruth Lake) 905 BKR Maintenance  
ATCO 24-Aug-21 09:00 24-Aug-21 16:00 7 Hours
Continuous		 919S 907, 9LJH-2 PRC005 Trip coil testing.
Test and operate 907		  
ATCO 24-Aug-21 09:00 24-Aug-21 16:00 7 Hours
Continuous		 920S 902, 920S 902T PRC-005 - TRIP COIL TESTING - BREAKER 902, 920S 902T OOS  
ATCO 24-Aug-21 10:00 26-Aug-21 14:00 2.17 Days
Continuous		 7L27, 7L27 (ATC 793s West Peace River - 834s Wesley Creek) Changing a structure and xarms  
ATCO 24-Aug-21 13:00 28-Aug-21 15:30 4.1 Days
Continuous		 930S SVC, 930s SVC (930s Arcenciel) SVC air cooling maintenance, various PRC relay testing  
ALTALINK 25-Aug-21 07:00 25-Aug-21 19:00 12 Hours
Daily		 13s T2 & 138kV Bus (808L, 815L) – GOI, 13s T2 (13s Deerland), 808L (13s Deerland - 808AL tap), 815L (13s Deerland - 127s Bruderheim) Replace 13s JBDC3 with new junction box. DC from the JB supplies 13s101, 13s452, 13s152, 13s552, 13s808N and 13s815W.  
ATCO 25-Aug-21 09:30 25-Aug-21 11:30 2 Hours
Continuous		 809S 901T, 7L19, 7L55, 7L43 .Aug 25, 2021 09:30 - 11:30 - 144Kv Bus partial outage, 809S 901T OOS, 7L19 OOS, 7L55 OOS 7L43 tied to 7L56 with N.O. 809S 700D1 - 2 Hour outage to Re-attach Jumper J1 at 809S - Isolation points:809S 700B, 809S 7L43D1, 809S 7L55D1, 809S 7L19D1, 809S 701A - 7L43 & 7L56 Tie Split at end of this work open N.O. 809S 700D1
Work will proceed under fair weather conditions only		  
EPCOR 26-Aug-21 07:00 27-Aug-21 17:00 1.42 Days
Continuous		 Summerside/Lambton S/S 1058L Bays Isolate 1058L to cut over alarms, status and controls to new RTU at Summerside  
ATCO 26-Aug-21 08:00 26-Aug-21 17:00 9 Hours
Continuous		 9L59, 9L59 (801s Anderson - 972s Tinchebray) Change Angle Pole  
BCH 26-Aug-21 09:00 27-Aug-21 17:00 1.33 Days
Continuous		 2L113 (B1s Natal - B2s Cranbrook) conductor repair AB-BC
ALTALINK 27-Aug-21 08:00 01-Sep-21 08:00 5 Days
Continuous		 33s 5 (33s Spray) inspection  
EPCOR 28-Aug-21 07:00 29-Aug-21 19:00 1.5 Days
Continuous		 TX1 @ Bellamy E814S, 814s T1 (814s Bellamy), 814s B2407 (814s Bellamy), 814s B2401 (814s Bellamy) Bellamy TX1 Oil Clean up and inspection, Doble Bellamy TX1 PT  
ATCO 29-Aug-21 09:00 01-Sep-21 16:00 3.29 Days
Continuous		 930S 702T, 930S Synchronous Condenser, 930s 702T (930s Arcenciel), 930s Syn Condenser (930s Arcenciel) 702T Maintenance, PRC Testing  
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  
ATCO 30-Aug-21 08:30 03-Oct-21 17:00 34.35 Days
Continuous		 809S 902T, 809s 902T (809s Louise Creek) Louise Creek Rebuild project Upgrade 902T protection. Replacing 809S 911 BKR  
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
ALTALINK 30-Aug-21 10:30 30-Aug-21 17:30 7 Hours
Daily		 320p401 (SS3) - GOI 1st trip and PRC5 maintenance, replace tank heater relay; New C60 breaker fail trip testing on breaker 1452 (320p401)  
ATCO 30-Aug-21 11:00 10-Sep-21 16:00 11.21 Days
Continuous		 840s 901T (840s MCNEILLSTATION), 840S McNeill Station, 840s 701T (840s MCNEILLSTATION) 6 x 25 kV breaker maintenance, replace station controller, leak repair 901T AB-SK
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 08:00 31-Aug-21 11:00 3 Hours
Daily		 17s46 (17s2852- 17s T3) - Advice, 17s 46 (17s Benalto), 17s 2852 (17s Benalto), 17s T3 (17s Benalto) Trip test  
ATCO 31-Aug-21 08:00 01-Sep-21 16:00 1.33 Days
Continuous		 7L04, 793S 704, 7L04 (ATC 793s West Peace River - 839s Daishowa), ATC 793s 704 (ATC 793s West Peace River) Complete 704 Maintenance PM, Mercer is aware they will be islanded for the duration  
SUNCOR 31-Aug-21 08:00 07-Sep-21 18:00 7.42 Days
Continuous		 29EDD-65 29PT-236 & 29PL7-3 SYST;PM 5y(A)  
ALTALINK 31-Aug-21 08:30 01-Sep-21 16:30 1.33 Days
Daily		 370s T3 (TX18307) GOI, 370s T3 (370s North Lethbridge) Clean up oil spill and repair leak.  
ALTALINK 31-Aug-21 09:30 31-Aug-21 16:30 7 Hours
Daily		 320p400 (SSTA & SSTB) - GOI 1st trip and PRC5 maintenance; New C60 breaker fail trip testing on breaker 1552 (320p400)  
ALTALINK 01-Sep-21 08:00 01-Sep-21 16:00 8 Hours
Daily		 33s 138 kV Bus GOI 33s5 switch maintenance  
ALTALINK 01-Sep-21 08:00 02-Sep-21 16:00 1.33 Days
Continuous		 33s 6 (33s Spray) maintenance  
ALTALINK 01-Sep-21 08:00 05-Sep-21 18:00 4.42 Days
Continuous		 33s 3 (33s Spray) Inspection  
ALTALINK 01-Sep-21 08:30 01-Sep-21 12:00 3.5 Hours
Daily		 525s850N (850L) GOI, 850L (525s Carseland - 678s Okotoks) Demo old T3 'S' Protection breaker fail trip. Cut in and commission new T3 'B' protection breaker fail trip and new VR2 protection trip to 525s850N. Re-prove breaker fail protection trip to 525s45 (525s45 to remain closed/in service at all times)  
ATCO 01-Sep-21 09:00 01-Sep-21 16:00 7 Hours
Continuous		 919S 905, 9LJH-1 PRC005 Trip coil testing.
Test and operate 905		  
ATCO 01-Sep-21 09:00 01-Sep-21 16:00 7 Hours
Continuous		 920S 901, 920S 901T PRC-005 - TRIP COIL TESTING - BREAKER 901, 920S 901T OOS  
ALTALINK 01-Sep-21 12:30 01-Sep-21 16:00 3.5 Hours
Daily		 525s851X (851L) GOI, 851L (253s Blackie - 525s Carseland) Demo old T3 'S' Protection breaker fail trip. Cut in and commission new T3 'B' protection breaker fail trip and new VR2 protection trip to 525s851X. Re-prove breaker fail protection trip to 525s45 (525s45 to remain closed/in service at all times)  
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 08:00 02-Sep-21 16:00 8 Hours
Daily		 33s2 GOI breaker maintenance  
ALTALINK 02-Sep-21 08:45 02-Sep-21 16:15 7.5 Hours
Daily		 908L (89s) - OOS, 908L (89s Ellerslie - 908AL tap) Breaker open on 908L for TPR work.  
ALTALINK 03-Sep-21 07:00 18-Sep-21 18:00 15.46 Days
Continuous		 861L, 258s T2 & 138kV Bus 2 - GOI, 861L (71s Lamoureux - 258s Dow Hydro Carbons), 258s T2 ( 258s Dow Hydro Carbons), 258s 138kV Bus 2 (258s Dowhydrocarbons) Migrate alarms and controls from the existing SCADA system to the new system. This will include 138kV Bus 2 protection, T2 Protection, breakers 258s152, 258s252, and 258s552 controls and status, MOD 258s861W control and status, and 861L protection alarms. Strain insulators for 861L into the substation will be replaced.  
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  
EPCOR 07-Sep-21 00:00 08-Sep-21 00:00 24 Hours
Continuous		 Poundmaker S/S Tx3 Bay Outage Removal of 240 kV bus work for PM2405 bay installation for WETUP project.

Tx3 to be energized from through PM2404 breaker during the restoration of this outage with 240 kV bus removed from PMDS1 to PMAB3 for the duration on PM2405 bay installation. Physical bus separation from PMDS1 to PMAB3 to remain upon Tx3 restoration.		  
ALTALINK 07-Sep-21 07:45 08-Sep-21 16:45 1.38 Days
Continuous		 1083L (288s - 63s) GOI, 1083L (63s Red Deer - 288s Wolf Creek) Fix 63s1083 MOD  
ALTALINK 07-Sep-21 08:00 07-Sep-21 11:00 3 Hours
Daily		 39s847W (847L-Open) - Advice - LL Required to open jumpers at 847L Str. 847L58, Hot Line Work  
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  
SUNCOR 07-Sep-21 08:00 22-Sep-21 17:00 15.38 Days
Continuous		 635PL9-1001 and 635PT-1001 260kV line structure change for line lift; maintenance of 260kV line, transformer, associated equipment and protection  
ATCO 07-Sep-21 08:30 07-Sep-21 12:00 3.5 Hours
Continuous		 919S 906, 847S 901T PRC005 Trip coil testing  
ATCO 07-Sep-21 08:30 10-Sep-21 16:50 3.35 Days
Continuous		 925S 902T 902T maintenance, load transferred to 901T  
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, 17s T3 (17s Benalto) SCADA alarm/control upgrade for T3, s389, s2852, Tie in new 138B3 'B' CT cont  
ALTALINK 07-Sep-21 11:30 15-Sep-21 12:00 8.02 Days
Continuous		 847L (39s-Open Point 'B'- 847L Str. XXX) Issue 847L and Temp bypass GOI to move 847L slack span to make room for future expansion, And Connect Temp bypass to 847L (Close Open Point ‘A’)  
ATCO 07-Sep-21 12:00 07-Sep-21 16:00 4 Hours
Continuous		 919S 908, 847S 902T PRC005 Trip coil testing.  
ALTALINK 08-Sep-21 07:00 14-Sep-21 18:00 6.46 Days
Continuous		 409s 138 kV Bus 1, T2, & 856L - GOI, 856L (409s Shell Scotford - 410s Josephburg) 409s T2 Oil reclamation & maintenance, T2 NGR maintenance, 409s107 breaker maintenance, 410s SCADA upgrade work. Transition from 409s T2 - GOI.  
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.  
ENMAX 08-Sep-21 08:00 08-Sep-21 16:00 8 Hours
Continuous		 25B240-D131 HV Breaker maintenance 25B240-D131  
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 (103s Goose Lake - 893BL tap), 893L (312s-I112s-I806s-103s) OOS, 893L (312s Fidler - 806s Oldman River), 893AL (112s Windy Point - 893L tap) Open 893L for 312s MPLS upgrade.  
EPCOR 09-Sep-21 00:00 10-Sep-21 00:00 24 Hours
Continuous		 Poundmaker S/S Tx2 Bay Outage and PM2401 bay outage Continuation of 240 kV ring re-configuration for WETUP project. 240 kV bus to be removed from PMDS1 and PMAB3 in order to make room for PM2405 breaker bay and CVT installation.

Tx3 to be energized from through PM2404 breaker during this outage.		  
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  
EPCOR 13-Sep-21 00:00 15-Nov-21 00:00 63.04 Days
Continuous		 Poundmaker S/S Tx3 Bay Outage Continuation of 240 kV ring re-configuration for WETUP project.

Tx3 bay to be isolated for 240 kV bus re-configuration and installation of PM2405, PMDS11 and CVT's.

Upon restoration Tx3 to be energized from PM2404 and a new isolation point of PMDS11 disconnect to remain open.		  
EPCOR 13-Sep-21 07:00 14-Sep-21 17:00 1.42 Days
Continuous		 Summerside S/S TX1 Bay Isolate Summerside TX1 Bay to cut over control, alarms, status to new RTU  
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  
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  
SUNCOR 13-Sep-21 08:00 17-Sep-21 17:00 4.38 Days
Continuous		 635PP-1001 Bus-Side Disconnect Repairs Main Sub 635EDD-1000  
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  
SUNCOR 13-Sep-21 08:00 22-Sep-21 18:00 9.42 Days
Continuous		 29EDD-65 29EDD65;29PT-250 & 29PL7-3 SYSTEM;PM 5y  
ATCO 13-Sep-21 08:30 15-Sep-21 16:50 2.35 Days
Continuous		 925S 901T, 925s 901T (925s Green Stocking) 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
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  
ATCO 13-Sep-21 12:00 16-Sep-21 17:00 3.21 Days
Continuous		 786S 703T, 786S SVC, 786s 703 (786s High Level), 786s 703T (786s High Level), 786s SVC (786s High Level) 703T Maintenance  
ALTALINK 13-Sep-21 12:00 16-Sep-21 18:00 3.25 Days
Continuous		 861L (258s - 71s) - GOI, 861L (71s Lamoureux - 258s Dow Hydro Carbons) 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.  
ATCO 14-Sep-21 09:30 14-Sep-21 10:30 60 Mins
Continuous		 828S 701, 7L93 PRC-005 - TRIP COIL TESTING - BREAKER 701 @ 828S
701 T&O required for testing TRIP & CLOSE coils
Open 7L93D2 for test and operate on 701		  
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 15-Sep-21 15:30 15-Sep-21 16:00 30 Mins
Daily		 39s847W (847L-Open) - Advice Required to close CPS1 Switch  
EPCOR 16-Sep-21 07:00 17-Sep-21 17:00 1.42 Days
Continuous		 Summerside S/S TX2 Bay Isolate Summerside TX2 Bay to cut over controls, alarms, status to new RTU  
ALTALINK 16-Sep-21 07:00 22-Sep-21 17:00 6.42 Days
Continuous		 847L (406s - Open) - Info 847L Will be open at 406s and supplying 740L during this time  
ALTALINK 16-Sep-21 07:00 22-Sep-21 18:00 6.46 Days
Continuous		 409s 138 kV Bus 1, T2, & 856L - GOI, 856L (409s Shell Scotford - 410s Josephburg) 409s T1 Oil reclamation & maintenance, T1 & T3 NGR maintenance, 409s807N & 409s110 breaker maintenance, 410s SCADA upgrade work. Transition to 409sT1 outage.  
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 10:15 17-Sep-21 13:45 3.5 Hours
Daily		 850L (525s Carseland - 678s Okotoks), 850L (525s - 678s) GOI Mobile Disconnect (470s)  
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 24-Sep-21 17:00 5.33 Days
Continuous		 790S 704, 790S 703T Replace 1 phase on 790S 704, 790S 703T maintenance  
ALTALINK 20-Sep-21 07:15 27-Sep-21 16:45 7.4 Days
Continuous		 12L44, 12L41(510s-A939s-A951s)ATCO-Advice 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  
ATCO 20-Sep-21 08:00 27-Sep-21 16:00 7.33 Days
Continuous		 12L44, 12L41, 951S 900BS1 Suncor Capacity increase project
Cut in new CT and PT circuit extension to the new RAS relays. Complete commissioning of RAS relays, end-to-end tests including output to Thickwood RAS		  
ATCO 20-Sep-21 10:00 22-Sep-21 12:00 2.08 Days
Continuous		 800S 701, 7L75 800S Friedenstal Breaker 701 Maintenance  
ALTALINK 20-Sep-21 12:30 23-Sep-21 16:30 3.17 Days
Continuous		 5s T1(TX18903) GOI, 5s T1 (5s East Calgary) maintenance, doble  
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  
ATCO 21-Sep-21 08:30 22-Sep-21 16:30 1.33 Days
Continuous		 848S 906, 848s 906 (848s Ruth Lake) 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  
ALTALINK 22-Sep-21 07:30 23-Sep-21 12:30 29 Hours
Continuous		 151s765 (765L) GOI, 151s 765W (151s Strathmore), 765L (151s Strathmore - 419s Chestermere) Install and commission relays for RAS on 765L, remove RAS from line protection relay.  
ATCO 22-Sep-21 12:00 24-Sep-21 17:00 2.21 Days
Continuous		 800S 702, 7L73 800S Friedenstal Breaker 702 Maintenance  
ALTALINK 22-Sep-21 14:30 22-Sep-21 17:00 2.5 Hours
Daily		 39s847W (847L - Open) - Advice Required to close jumpers at 847L Str.847L58  
ALTALINK 23-Sep-21 07:15 23-Sep-21 14:00 6.75 Hours
Daily		 498s T2 (Tx18854) & 25kV BUS 2 GOI T2 outage to complete trip testing on 498s22, settings change, and CT wiring for new protections  
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  
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 11:00 27-Sep-21 17:30 6.5 Hours
Daily		 12s952 - GOI, 12s 952 (12s Heartland) Gas top up and take care of breaker trouble alarm  
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, 62s T5 (62s Brazeau) 62sT5 PRC5 doble, maintenance, buck indicator, gas monitor failure, Connect IDD, LA base insulators, leak from H1, LTC push buttons replace for MR  
ALTALINK 28-Sep-21 09:00 06-Oct-21 17:00 8.33 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.  
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 05-Oct-21 17:00 1.42 Days
Continuous		 240kV Bus 1/2 and 1164L @ Riverview and Petrolia E816S, 1164L (816s Petrolia - EPCOR Riverview), RW2401 (EPCOR Riverview), RW2402 (EPCOR Riverview) RWDS2 / RWDS3 / RWDS11 adjustments  
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 08-Oct-21 17:00 4.42 Days
Continuous		 TX3 @ Jasper Terminal E805S Isolate TX3 to cutover and commission 15 KV protection  
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, EPCOR 04-Oct-21 07:00 15-Oct-21 17:00 11.42 Days
Continuous		 CV5 (E511s-E557s) EPCOR - Info, 553s T5 (553s 511s Victoria Trail), CV5 (EP 511s Victoria - 557s Castle Downs) Epcor CV5 Manhole Inspections  
ATCO 04-Oct-21 08:00 08-Oct-21 16:00 4.33 Days
Continuous		 720S 902T, 720s 902T (720s Wabasca) 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 08:30 06-Oct-21 17:00 2.35 Days
Continuous		 304s/581s/764L/719AL - GOI (719AL) maintenance on structure 81. (764L) maintenance on structures 1, 7, 50, 53, 143. (304s) 25kV breaker maintenance (304s281X). Maintenance, doble (T2 (TX18585)), install polymer insulator and ring. (581s) hotspots, adjust switches (581s2, 581s719AL)  
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, 61s T1 (61s Lodgepole), 202L (61s Lodgepole - 62s Brazeau), 836L (61s Lodgepole - 283s Violet Grove) Replacing 61s13 and strain insulators on 836L  
ALTALINK 04-Oct-21 12:00 06-Oct-21 17:00 2.21 Days
Continuous		 253s753W (753L) GOI, 253s 753W (253s Blackie), 753L (65s High River - 253s Blackie) 138kV breaker maintenance, replace grading caps, remove birds nest  
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
ATCO 05-Oct-21 08:00 11-Oct-21 16:00 6.33 Days
Continuous		 9L07, 951S 905, 951S 906 Cut in CT/'PT/SCADA circuits to the new RAS relays  
EPCOR 06-Oct-21 07:00 06-Oct-21 17:00 10 Hours
Continuous		 RWDS12 and 1139L @ Riverview and Harry Smith 367S RWDS12 adjustment  
CMH 06-Oct-21 08:00 13-Oct-21 08:00 7 Days
Continuous		 MH-16L (MH69S-2 - MH69S-16), MH69s2 MH69-224 (MH69s2 North Industrial) construction at the CMH facility  
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  
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, 1206L (12s Heartland - 89s Ellerslie) 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 15-Oct-21 17:00 3.42 Days
Continuous		 TX4 @ Jasper Terminal E805S Isolate TX4 to cutover and commission 15 KV protection  
ATCO 12-Oct-21 08:30 15-Oct-21 16:50 3.35 Days
Continuous		 977S 901T 901T maintenance  
ALTALINK 12-Oct-21 09:00 14-Oct-21 17:00 2.33 Days
Continuous		 42s7.82 (42s - Enmax Sub #7) GOI 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 12-Oct-21 13:30 15-Oct-21 13:00 2.98 Days
Continuous		 39s T1 & 240kV Bus 1 - GOI, 39s T1 (39s Bickerdike) Replace 240kV CTs associated with 39s26. Repair 39s25.  
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 13-Oct-21 07:15 14-Oct-21 17:45 1.44 Days
Continuous		 719L (256s - 719L134) GOI, 719L (256s Harmattan - 719CL tap) maintenance work on Strs 65, 68, 69, 70 and 72  
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 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), install/commission new protections (rattlesnake ridge) (P2212)  
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)  
ENMAX, ALTALINK 18-Oct-21 08:00 21-Oct-21 16:00 3.33 Days
Continuous		 833L, 833L (ENMAX 2 - ENMAX 12) 12B138-833L CT Replacement  
ATCO 18-Oct-21 09:00 20-Oct-21 16:15 2.3 Days
Continuous		 888S 906, 888S 906 Recloser 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 10:05 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  
ALTALINK 19-Oct-21 07:00 09-Nov-21 17:30 21.48 Days
Continuous		 39s1052 - GOI, 39s 1052 (39s Bickerdike) GOI to allow for the addition of breaker 1152 and associated equipment. New 39s1152 Being installed between 39s11A, and 39s31, Part of 240kV Expansion cascade project.  
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, 7L39 (811s Clairmont Lake - 7L39 tap), 811s 709 (811s Clairmont Lake) 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, EP 803s T1 (EP 803s Lambton), EP 803s L2401 (EP 803s Lambton), EP 803s L2402 (EP 803s Lambton) Lambton LDS2 LCR  
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  
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  
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		  
ATCO 25-Oct-21 10:00 27-Oct-21 16:00 2.25 Days
Continuous		 790S 702, 7L22 790S 702 maintenance, 7L22 open ended  
ALTALINK 25-Oct-21 11:00 28-Oct-21 18:00 3.29 Days
Continuous		 89s T2 & 240kV East Bus 2 - GOI, 89s T2 (89s Ellerslie), 289s 240kV Bus 2 (289s Saunders Lake) 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, 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, 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
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, 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  
ATCO 01-Nov-21 08:00 04-Nov-21 17:00 3.38 Days
Continuous		 7L69, 7L69 (731s Elmworth - 815s Goodfare) 731S Elmworth Project
Test and Operate 815S 704		  
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, 848L (17s Benalto - 848AL tap), 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 10-Nov-21 17:30 9.31 Days
Continuous		 905L (37s - 19s) - GOI 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  
EPCOR, ALTALINK 01-Nov-21 12:00 04-Nov-21 18:00 3.25 Days
Continuous		 ALTALINK - 908L(89s-E52s-38s) - DE-ENERGIZE LINE, 908L (38s East Edmonton - 89s Ellerslie), 908AL (52S East Industrial - 908L tap) Component replacements and fire mitigation on Str's Range 233-298  
ALTALINK 02-Nov-21 07:15 03-Nov-21 17:15 1.42 Days
Continuous		 312s 138kV BUS GOI, 312s T1 (312s Fidler), 312s 138kV Bus 1 (312s Fidler) Attempt repair / oil top up of VT22. One phase has a slow leak.  
ATCO 05-Nov-21 08:00 08-Nov-21 17:00 3.42 Days
Continuous		 7L03, 7L03 (731s Elmworth - 749s Flying Shot) 731S Elmworth Project  
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, 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  
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  
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 (657s Summerside - EP 803s Lambton) 1058L Line Maintenance and Lambton LDS6 LCR  
ATCO 15-Nov-21 08:00 18-Nov-21 17:00 3.38 Days
Continuous		 7L22, 7L22 (790s Poplar Hill - 7L88 tap), 7L22 (811s Clairmont Lake - 7L88 tap) 731S Elmworth Project  
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 17-Nov-21 00:00 20-Dec-21 00:00 33 Days
Continuous		 Poundmaker S/S Tx2 Bay Outage, 1098L bay outage and PM2405 bay outage 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.		  
ATCO 19-Nov-21 08:00 22-Nov-21 17:00 3.38 Days
Continuous		 7L07, 7L07 (790s Poplar Hill - 815s Goodfare) 731S Elmworth Project  
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, 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  
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, 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  
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)  
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, 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 Lambton LDS5 LCR
(Isolates 72LH8 and 72LS24 from Lambton)		  
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 17-Dec-21 07:00 18-Dec-21 17:30 1.44 Days
Continuous		 39s T2 & 240B2 & New 240KV - GOI GOI on 240B2 to close open point K to new sub expansion equipment  
ALTALINK 18-Dec-21 17:30 18-Jan-22 07:00 30.56 Days
Continuous		 339s New 240KV Equipment - GOI GOI on New substation equipment - required for continued construction  
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		  
ALTALINK 02-Feb-22 08:00 10-Feb-22 17:00 8.38 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.  
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		  
ALTALINK 12-Feb-22 08:00 20-Feb-22 17:00 8.38 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 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 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.		  
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 28-Feb-22 08:00 02-Mar-22 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 28-Feb-22 08:00 02-Mar-22 16:00 2.33 Days
Continuous		 801S 903, 801S 902, 9L59, 9L59 (801s Anderson - 972s Tinchebray) TransAlta GARDEN PLAIN PROJECT
Relay Settings changes		  
ATCO, GREENGATEP 28-Feb-22 08:00 02-Mar-22 16:00 2.33 Days
Continuous		 972S 901, 972S 902, 9L59, 972s 901 (972s Tinchebray), 972s 902 (972s Tinchebray), 9L59 (801s Anderson - 972s Tinchebray) TransAlta GARDEN PLAIN PROJECT
Relay Settings Changes		  
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 14-Mar-22 08:00 01-Apr-22 16:00 18.33 Days
Continuous		 951S 900BS2, 951S 908, 951S 903, 951S 906 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		  
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, 1098L (805s Jasper - Poundmaker), 805s J2407 (805s Jasper), 805s J2401 (805s Jasper) 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, 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 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 WIND FARM 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 WIND FARM 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 23-May-22 08:00 26-May-22 16:00 3.33 Days
Continuous		 9L23, 848S 905, 848S 906 Cut in new CT and PT circuit extension to the new RAS relays, complete SCADA terminations  
ATCO 27-May-22 08:00 30-May-22 16:00 3.33 Days
Continuous		 848S 901T Complete cut in CT/'PT/SCADAcircuits to the new RAS relays  
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 06-Jun-22 08:00 09-Jun-22 16:00 3.33 Days
Continuous		 848S 902T Cut in new CT and PT circuit extension to the new RAS relays, complete SCADA terminations.  
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 BER Hand Hills Wind 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 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: 2021-07-28   3:03:57 PM


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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