Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2018-02-24

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.

Previous Version
Download CSV

Owner From To Duration Element Scheduled Activity Affected Intertie
ATCO 06-Nov-17 15:01 02-Mar-18 16:00 116.04 Days
Continuous
863S Paintearth,9L948 (650s Hansman Lake - 863s Paintearth) 240 kV switch replacement - changed to forced outage  
ALTALINK 06-Feb-18 10:00 15-Mar-18 15:30 37.19 Days
Continuous
526L (268s Whitecourt - 526DL185) work between structures 1 - 151  
ATCO 19-Feb-18 07:00 02-Mar-18 17:00 11.42 Days
Continuous
7L90 (813s Little Smoky - 741s Fox Creek) attach Muir t-tap switch  
ATCO 20-Feb-18 08:00 26-Feb-18 17:00 6.38 Days
Continuous
7L64 (930s Arcenciel - 7L64D5) line mitigation  
ALTALINK 20-Feb-18 12:31 08-Mar-18 13:00 16.02 Days
Continuous
932L (74s Janet - 162s Beddington),74s T1 (74s Janet),929L (74S Janet - 287s Hazelwood) 74s352 CT, 74s552 CT, 74s92 PT, 74s94 PT replacements  
ALTALINK 22-Feb-18 18:46 28-Feb-18 18:45 6 Days
Continuous
1002L (275s Jenner - 163s Amoco Empress) interphase spacer installation  
ALTALINK 26-Feb-18 07:30 26-Feb-18 11:30 4 Hours
Daily
289s1452 & 289s1552 (1140L) GOI [SWEATD] [SWEATD] Install Grounding stirrups on 1140L stub bus  
ALTALINK 26-Feb-18 11:00 26-Feb-18 18:00 7 Hours
Daily
1048L (59s - 138s) Breaker Open Advice RAS scheme 129, 604, 605 modifications as directed by AESO. affecting 1048L protections  
ALTALINK 26-Feb-18 12:00 26-Feb-18 17:30 5.5 Hours
Daily
289s1752 & 289s1852 (1112L) GOI [SWEATD] [SWEATD] Install Grounding stirrups on 1112L stub bus  
ALTALINK 26-Feb-18 13:00 26-Feb-18 16:00 3 Hours
Daily
320p2152 GOI (Emergency Work) South PH low in gas  
ALTALINK 27-Feb-18 07:30 27-Feb-18 11:30 4 Hours
Daily
289s1352 & 289s1452 (910L) GOI [SWEATD] [SWEATD] Install Grounding stirrups on 910L stub bus  
ALTALINK 27-Feb-18 08:00 27-Feb-18 13:00 5 Hours
Daily
1049L (59s - 138s) Breaker Open Advice RAS scheme 129, 604, 605 modifications as directed by AESO. affecting 1049L protections  
BCH, ALTALINK 27-Feb-18 09:00 27-Feb-18 17:00 8 Hours
Continuous
1L274 (48s Pocaterra - Britt Creek),887L (48s Pocaterra - BCH Britt Creek) NIC 1L274 RAS TT TO POC OOS for teleprotection PM. End to End testing with AltaLink. There will be no TT redundancy during this outage,Testing of RAS DTT. Coordinated for workers at both ends. AB-BC
ALTALINK 27-Feb-18 12:00 27-Feb-18 17:30 5.5 Hours
Daily
289s1652 & 289s1752 (914L) GOI [SWEATD] [SWEATD] Install Grounding stirrups on 914L stub bus  
ALTALINK 27-Feb-18 13:00 27-Feb-18 18:00 5 Hours
Daily
955L (59s-103s) Breaker Open Advice RAS scheme 129, 604, 605 modifications as directed by AESO. affecting 955L protections  
ALTALINK 28-Feb-18 07:00 28-Feb-18 13:00 6 Hours
Daily
956L (59s-103s) Breaker Open Advice RAS scheme 129, 604, 605 modifications as directed by AESO. affecting 956L protections  
ATCO 28-Feb-18 07:00 01-Mar-18 18:00 1.46 Days
Continuous
9L07 Install pilings for new structures on 9L07 for new 951S Thickwood Hills substation.  
ENMAX 28-Feb-18 08:00 01-Mar-18 16:00 1.33 Days
Continuous
932L Repair SW145 and SW144@ 162sub. Piggy back on Altalink outage. Enmax crew to sign onto Altalink GOI at 74s.  
ALTALINK 01-Mar-18 12:00 01-Mar-18 17:30 5.5 Hours
Daily
289s 138kV Bus 2 (858L) GOI [SWEATD] [SWEATD] Install Grounding stirrups on 858L stub bus & 138kv bus 2  
ALTALINK 05-Mar-18 07:30 05-Mar-18 12:00 4.5 Hours
Daily
367s1352 & 367s1552 (1139L) GOI [SWEATD] [SWEATD] Install 240kV ground stirrups  
BCH 05-Mar-18 09:00 08-Mar-18 15:30 3.27 Days
Continuous
5L72 (Mica Creek - Nicola) MCA 5CB7 OOS for timing tests and PM. This testing also requires 5L72 and 5RX3 OOS AB-BC
ALTALINK 05-Mar-18 09:00 09-Mar-18 12:00 4.13 Days
Daily
17s5 - GOI Protections Upgrade - C60 installation for 17s5 Breaker/ trip  
ATCO 05-Mar-18 09:30 07-Mar-18 17:00 2.31 Days
Continuous
7L701 7L701 Arm Change  
ALTALINK 05-Mar-18 13:00 05-Mar-18 17:30 4.5 Hours
Daily
367s1652 & 367s1852 (1043L) GOI [SWEATD] [SWEATD] Install 240kV ground stirrups  
ALTALINK 06-Mar-18 07:30 06-Mar-18 17:30 10 Hours
Daily
367s 138kV Bus 1 (T1,452L,453L) GOI [S [SWEATD] Install ground stirrups on 138KV bus  
ALTALINK 06-Mar-18 08:00 06-Mar-18 15:00 7 Hours
Daily
28s MPLS -TPR Investigate cause of low signal on fiber for 7705A at 28S West Brooks  
ALTALINK 06-Mar-18 08:00 06-Mar-18 17:00 9 Hours
Daily
33s6 (33s Spray) maintenance  
ALTALINK 06-Mar-18 08:00 13-Mar-18 18:00 7.38 Days
Continuous
41s station,880L(41s-321s-523s) Advice Install 880L bypass, cut free 41s-create open points:AA, BB,CC, DD,R,S,T (salvage release). Close open points: A,B and D on new 880L. Test energize new 880L(523s-321s)and phase @ 321s.  
ALTALINK 06-Mar-18 08:30 08-Mar-18 12:00 2.15 Days
Continuous
788L (157s - 788L106B) - GOI Component replacement  
SUNCOR 06-Mar-18 09:00 09-Mar-18 18:00 3.38 Days
Continuous
29PL9-13 (29EDD-34 - 29EDD-65) repair of broken strands on 260kV powerline  
ATCO 06-Mar-18 10:00 06-Mar-18 16:00 6 Hours
Continuous
Flat Top_T-Telecom upgrading MDR 8000 radios at Flattop and Narrows Creek to redundancy  
ALTALINK 07-Mar-18 07:30 07-Mar-18 17:30 10 Hours
Daily
446L) GOI [SWEATD],367s 138kV Bus 2 (T2 [SWEATD] Install ground stirrups on 138KV bus  
ATCO 07-Mar-18 08:00 08-Mar-18 17:00 1.38 Days
Continuous
840S McNeill Station Require McNeill to Standby for Repair of leaks in De-Ionizing system and main piping of valve cooling.- no ability to transfer during work AB-SK
ALTALINK 07-Mar-18 10:00 07-Mar-18 16:00 6 Hours
Daily
953L (755s - 574s) De-energize 953L needs to be de-energized as part of the 9404R Bonlea - 9933R ATCO Strome radio replacement  
ENMAX 08-Mar-18 12:00 08-Mar-18 18:00 6 Hours
Continuous
23.80L. 23.4TR Spring Substation Washing  
ALTALINK 08-Mar-18 12:30 15-Mar-18 16:30 7.13 Days
Continuous
788L (A898s - 602L1 - 788L107A) - GOI Component replacement  
ALTALINK 08-Mar-18 13:00 08-Mar-18 18:00 5 Hours
Daily
74s 240kV Bus 1 & 932L/929L – GOI Close Open Point ‘A’ On Sheet one on 240kV Bus 1 between 74s48 and Sheet 2  
ENMAX 09-Mar-18 08:00 09-Mar-18 12:00 4 Hours
Continuous
28.80L. 28.2TR. 28PT138-Z31 Spring Substation Washing  
EPCOR 10-Mar-18 06:00 10-Mar-18 19:00 13 Hours
Continuous
987s GDS2 (987s Cloverbar) customer outage  
EPCOR 12-Mar-18 07:00 16-Mar-18 17:00 4.42 Days
Continuous
920L-E @ Castle Downs S/S Relay Maintenance  
ALTALINK 12-Mar-18 08:30 16-Mar-18 15:30 4.29 Days
Continuous
922L (17s-310p) - GOI Protections Upgrade - C60 installation  
ALTALINK 12-Mar-18 09:00 12-Mar-18 18:00 9 Hours
Daily
931L (132s - 28s) - Advice Salvaging old Underpower RAS Scheme and associated equipment @ 132s; This RAS is no longer in use and is being removed permanently. Crews will not be hanging grounds and just require the equipment de- energized  
ALTALINK 12-Mar-18 09:15 15-Mar-18 17:45 3.35 Days
Continuous
918L (281s - C162s) GOI Component Replacement  
ATCO 14-Mar-18 07:00 22-Mar-18 17:30 8.44 Days
Continuous
9L01 9L01 Cut in for in and out addition of 951S Thickwood Hills substation. Install new structures.  
ENMAX 14-Mar-18 08:00 15-Mar-18 16:00 1.33 Days
Continuous
7.84L. 36.81L. 36.1TR. 36.3TR HV SW/MD Maintenance 36.1MD, SW88, SW89, SW90. Doble 36.3TR secondary cables. Fall Substation Washing  
ALTALINK 14-Mar-18 11:30 14-Mar-18 18:30 7 Hours
Daily
44s36.81E (36.81L) Enmax Open - Advice Enmax Spring washing  
ENMAX 14-Mar-18 12:00 14-Mar-18 18:00 6 Hours
Continuous
7.84L. 36.81L. 36.1TR. 36.3TR. 36PT138-Z31. 7PT138-7.84 Spring Substation Washing  
ALTALINK 15-Mar-18 07:00 19-Mar-18 18:00 4.46 Days
Continuous
927L (102s - 356s) GOI Re-Conductor Both OHSW's & Install Ariel Markers on 927L (Str 53-54)  
ALTALINK 15-Mar-18 07:00 19-Mar-18 18:00 4.46 Days
Continuous
924L (102s - 356s) GOI Re-Conductor Both OHSW's & Install Ariel Markers on 924L (Str 53-54)  
EPCOR 16-Mar-18 13:30 16-Mar-18 17:00 3.5 Hours
Continuous
J2404 @ Jasper Nait Switching  
ALTALINK 19-Mar-18 06:30 19-Mar-18 12:30 6 Hours
Daily
17s11 - GOI Protections Upgrade - Breaker trip tests  
EPCOR 19-Mar-18 07:00 23-Mar-18 17:00 4.42 Days
Continuous
920L-W @ Castle Downs S/S Relay Maintenance  
ALTALINK 19-Mar-18 08:00 23-Mar-18 16:00 4.33 Days
Continuous
511s T30 and SVC Plus,R1 and R2 GOI T30 Inspection, Cooling system maintenance, corrective P &C work and Testing. No impact to Link Dispatch for MW transfer  
EPCOR 19-Mar-18 09:00 19-Mar-18 17:00 8 Hours
Continuous
430L @ Genesee S/S Relay Maintenance  
ALTALINK 19-Mar-18 09:00 22-Mar-18 18:00 3.38 Days
Continuous
777L (48s - 245s) GOI Structure Repair (87~89) AB-BC
SUNCOR 19-Mar-18 09:00 23-Mar-18 18:00 4.38 Days
Continuous
29EDD-1 29EDD1S1852 (29EDD-1) SF6 top up on breaker  
ALTALINK 19-Mar-18 09:15 22-Mar-18 17:45 3.35 Days
Continuous
918L (281s - C162s) GOI Component Replacement  
ALTALINK 19-Mar-18 12:30 19-Mar-18 18:00 5.5 Hours
Daily
17s7 - GOI Protections Upgrade - Breaker trip tests  
ALTALINK 20-Mar-18 06:30 20-Mar-18 12:30 6 Hours
Daily
17s1 - GOI Protections Upgrade - Breaker trip tests  
ALTALINK 20-Mar-18 07:30 31-Mar-18 16:30 11.38 Days
Continuous
42s56 (35.81L) Enmax - Advice Enmax road contractor to install girders on a bridge south of 42s  
ENMAX 20-Mar-18 08:00 31-Mar-18 16:00 11.33 Days
Continuous
35.81L Request from road contractor to install girders on a bridge south of 42s  
ALTALINK 20-Mar-18 09:00 20-Mar-18 17:00 8 Hours
Daily
320p152 GOI Techs to perform repairs to FT switch 99-186 while at site.  
ALTALINK 20-Mar-18 12:30 20-Mar-18 18:00 5.5 Hours
Daily
17s5 - GOI Protections Upgrade - Breaker trip tests  
ALTALINK 21-Mar-18 06:30 21-Mar-18 12:30 6 Hours
Daily
17s10 - GOI Protections Upgrade - Breaker trip tests  
ALTALINK 21-Mar-18 09:00 21-Mar-18 18:00 9 Hours
Daily
86s1752 GOI (Affecting 914L) Tech to perform standard relay maintenance and recloser maintenance on the following; 86S1752 11(96/25SC/79)/1752 URC60  
ALTALINK 21-Mar-18 12:30 21-Mar-18 18:00 5.5 Hours
Daily
17s2852 & T3 - GOI Protections Upgrade - Breaker trip tests  
ATCO 26-Mar-18 07:00 10-Apr-18 17:00 15.42 Days
Continuous
847S 902T,919S 908 Transformer protection upgrade  
ALTALINK 26-Mar-18 07:30 28-Mar-18 17:30 2.42 Days
Continuous
367s T1 (Tx18938) GOI [SWEATD] *placeho [SWEATD] Tap changer gas piping modification  
ATCO 26-Mar-18 08:00 28-Mar-18 17:00 2.38 Days
Daily
7L32 replace rotten crossarms from inspection  
Syncrude 26-Mar-18 08:00 01-Apr-18 18:00 6.42 Days
Continuous
AL-1 (D05 Syncrude - Aurora) line maintenance  
ALTALINK 26-Mar-18 09:00 30-Mar-18 16:00 4.29 Days
Continuous
510s 500kV ACF14 GOI ACF 14 Shunt Reactor Inspection and leak repair.  
SUNCOR 26-Mar-18 09:00 30-Mar-18 18:00 4.38 Days
Continuous
29EDD1S452 (29EDD-1 Millennium) SF6 top up on breaker 29EDD1S452  
ALTALINK 26-Mar-18 09:15 28-Mar-18 17:45 2.35 Days
Continuous
918L (281s - C162s) GOI Component Replacement  
ALTALINK 26-Mar-18 12:30 26-Mar-18 17:00 4.5 Hours
Daily
69s230W - GOI Techs will be at site to perform standard relay testing on: 230L 579 RYAAH, VSR / RXKF1 and functional testing Auto-recloser 69s230W breaker  
ATCO 27-Mar-18 10:00 28-Mar-18 12:00 26 Hours
Continuous
939S 911 939S 911 Pole 1 Repair SF6 Leak

Repair Leaking Breaker Pole

The Phase Shifting Transformer will be out of service
 
ATCO 28-Mar-18 12:30 29-Mar-18 15:00 26.5 Hours
Continuous
939S 904 Repair Breaker 904 @ 939S Livock

Repair and Top up Breaker 904.

this Breaker has a long history of a slow leak. The Breaker is currently low and will need a top up for safe operation.
We will be attempting a permanent repair during this outage which is why it cannot be done in one day.

240 KV Bus Open for duration of repair
 
ALTALINK 29-Mar-18 07:30 31-Mar-18 17:30 2.42 Days
Continuous
367s T2 (Tx18939) GOI [SWEATD] *placeho [SWEATD] Tap changer gas piping modification  
ENMAX 02-Apr-18 08:00 18-Apr-18 16:00 16.33 Days
Continuous
ENMAX 25 B240-D131 (ENMAX 25),ENMAX 25 B240-D132 (ENMAX 25) switch repair  
ALTALINK 03-Apr-18 07:30 05-Apr-18 17:30 2.42 Days
Continuous
289s T2 (Tx18941) GOI [SWEATD] *placeho [SWEATD] Tap changer gas piping modification  
ATCO 03-Apr-18 08:00 05-Apr-18 17:00 2.38 Days
Daily
7L32 replace rotten crossarms from inspection  
ENMAX 03-Apr-18 08:00 17-Apr-18 16:00 14.33 Days
Continuous
936L Green Line LRT Project  
ENMAX 03-Apr-18 08:00 17-Apr-18 16:00 14.33 Days
Continuous
937L Green Line LRT Project  
EPCOR 09-Apr-18 07:00 13-Apr-18 17:00 4.42 Days
Continuous
TX3 @ Cloverbar Doble  
ALTALINK 09-Apr-18 07:30 11-Apr-18 17:30 2.42 Days
Continuous
289s T1 (Tx18940) GOI [SWEATD] *placeho [SWEATD] Tap changer gas piping modification  
BCH 09-Apr-18 09:00 20-Apr-18 17:00 11.33 Days
Continuous
2L294 (Cranbrook - Nelway) Fortis annual plan (AAL CB3-1 Switch Replacement) AB-BC
ALTALINK 09-Apr-18 12:30 12-Apr-18 17:30 3.21 Days
Continuous
77s40 (938L) - GOI 240kV CT replacement & 77s40 mtce.  
ALTALINK 12-Apr-18 08:00 23-Apr-18 18:00 11.42 Days
Continuous
38s T1 & 240kV Bus 1 - GOI Replace T1 & 38s50  
Syncrude 13-Apr-18 08:00 20-Apr-18 18:00 7.42 Days
Continuous
AL-2 (D05 Syncrude - Aurora) line maintenance  
EPCOR 16-Apr-18 07:00 20-Apr-18 17:00 4.42 Days
Continuous
TX2 @ Castledowns Calisto Install  
EPCOR 16-Apr-18 07:00 20-Apr-18 17:00 4.42 Days
Continuous
TX4 @ Cloverbar Doble  
ATCO 16-Apr-18 07:00 30-Apr-18 17:00 14.42 Days
Continuous
919S 906,847S 901T Transformer protection upgrade  
EPCOR 20-Apr-18 07:00 20-Apr-18 17:00 10 Hours
Continuous
Bus 2 240KV @ Cloverbar Doble  
Syncrude 21-Apr-18 08:00 01-May-18 18:00 10.42 Days
Continuous
D05 T1 (D05 Syncrude) will be isolated
from Primary and Secondary for
5 Yr PM.
 
EPCOR 23-Apr-18 07:00 27-Apr-18 17:00 4.42 Days
Continuous
TX1 @ Bellamy Doble  
EPCOR 23-Apr-18 07:00 27-Apr-18 17:00 4.42 Days
Daily
C2406 @ Cloverbar Maint  
ALTALINK 23-Apr-18 13:00 25-Apr-18 17:00 2.17 Days
Continuous
28s T2(Tx 18775) GOI Maintain, doble and SFRA T2  
ENMAX 25-Apr-18 08:00 25-Apr-18 16:00 8 Hours
Continuous
7.82L. HV breaker maintenance 7B138-7.82, SF6 gas sample 7B138-7.82  
ALTALINK 25-Apr-18 08:30 25-Apr-18 17:00 8.5 Hours
Daily
17s T1(Tx 18515) GOI Maintain, doble and SFRA T1  
ALTALINK 26-Apr-18 08:30 26-Apr-18 17:00 8.5 Hours
Daily
900L (63s-17s) - GOI 17s900E Unable to open and needs to be adjusted  
EPCOR 30-Apr-18 07:00 04-May-18 17:00 4.42 Days
Continuous
TX2 @ Bellamy Doble  
ATCO 30-Apr-18 07:00 11-May-18 18:00 11.46 Days
Continuous
2029S BUILDING VALVE HALL Valve Hall outage is required to conduct Preventative Maintenance on all equipment within the zone of isolation i.e. Valve Cooling DIW Strainers, Valve Module inspections, Switch operations, etc. Power transmission on the DC link (13L50) will not be possible during the outage.
.
 
ATCO 30-Apr-18 07:00 11-May-18 18:00 11.46 Days
Continuous
2075S BUILDING VALVE HALL Valve Hall outage is required to conduct Preventative Maintenance on all equipment within the zone of isolation. i.e. Valve Cooling DIW Strainers, Valve Module inspections, Switch operations, etc. Power transmission on the DC link (13L50) will not be possible during the outage.  
ATCO 30-Apr-18 07:00 11-May-18 18:00 11.46 Days
Continuous
13L50 (DC LINK) 13L50 will be out of service during this time as the connecting stations, Heathfield and Newell, are isolating their respective Valve Halls.  
ENMAX, ALTALINK 30-Apr-18 08:00 01-May-18 16:00 1.33 Days
Continuous
832L (ENMAX 10 - ENMAX 12) HV breaker maintenance 12B138-832L  
ALTALINK 30-Apr-18 11:30 03-May-18 16:30 3.21 Days
Continuous
63s452- GOI Maintain minimum oil breaker 240kV ABB HLRE.  
ATCO 01-May-18 07:00 13-May-18 17:30 12.44 Days
Continuous
710S 704,7L129 Protection upgrades  
EPCOR 02-May-18 07:00 02-May-18 17:00 10 Hours
Continuous
E2402 @ East Industrial Maint  
EPCOR 07-May-18 07:00 11-May-18 17:00 4.42 Days
Continuous
TX3 @ Jasper Doble  
BCH 07-May-18 09:00 11-May-18 17:00 4.33 Days
Continuous
2L112 (Nelway - Boundary) annual plan request F19 AB-BC
EPCOR 22-May-18 07:00 08-Jun-18 17:00 17.42 Days
Continuous
TX5 @ Victoria & 240CV5 Doble / Cable, manhole inspection.  
BCH 22-May-18 09:00 15-Jun-18 17:00 24.33 Days
Continuous
5L72 (Mica Creek - Nicola) Annual Plan Request F19 - PLACEHOLDER for Conductor Spacer Replacement AB-BC
EPCOR 28-May-18 07:00 28-May-18 17:00 10 Hours
Continuous
BA3/1055L @ Argyl Doble  
EPCOR 29-May-18 07:00 29-May-18 17:00 10 Hours
Continuous
920L @ Castledowns / North Calder Doble  
ATCO 30-May-18 07:00 01-Jun-18 17:30 2.44 Days
Continuous
9L46 Attach new Sharp Hills wind farm in/out connection.  
SUNCOR 31-May-18 09:00 21-Jun-18 18:00 21.38 Days
Continuous
29PL6-7 (836s Steepbank - 29EDD-5 29Edd-5) 5 year maintenance  
ATCO 02-Jun-18 08:00 04-Jun-18 17:00 2.38 Days
Continuous
7L81,791S 702 Install new 7L81 RASA & RASB  
ALTALINK 04-Jun-18 13:00 07-Jun-18 17:00 3.17 Days
Continuous
1053L (324s - 132s) GOI SCADA system upgrade  
BCH 05-Jun-18 09:00 15-Jun-18 17:00 10.33 Days
Continuous
2L294 (Nelway - A.A. Lambert) replacement of defective insulators AB-BC
BCH 06-Jun-18 09:00 07-Jun-18 17:00 1.33 Days
Continuous
1L274 (Elkford - EFT1D21) Annual Plan Request AB-BC
CENOVUS 07-Jun-18 07:00 10-Jun-18 18:00 3.46 Days
Continuous
539s PCB_9202 (539s Sunday Creek) insulator testing  
CENOVUS 07-Jun-18 07:00 10-Jun-18 18:00 3.46 Days
Continuous
539s PCB_9203 (539s Sunday Creek) insulator testing  
CENOVUS 07-Jun-18 07:00 10-Jun-18 18:00 3.46 Days
Continuous
539s 9201T (539s Sunday Creek) insulator testing  
ALTALINK 11-Jun-18 13:00 14-Jun-18 17:00 3.17 Days
Continuous
935L (324s - 356s) GOI SCADA system upgrade  
EPCOR 18-Jun-18 07:00 22-Sep-18 17:00 96.42 Days
Continuous
TX1 @ Jasper Doble  
BCH 18-Jun-18 09:00 06-Jul-18 17:00 18.33 Days
Continuous
5L71 (Mica Creek - Nicola) Annual Plan Request F19 AB-BC
ALTALINK 18-Jun-18 13:00 21-Jun-18 17:00 3.17 Days
Continuous
1052L (324s - 28s) GOI SCADA system upgrade  
BCH 19-Jun-18 09:00 21-Jun-18 17:00 2.33 Days
Continuous
2L293 (Selkirk - Nelway) Placeholder for Annual Plan Request F19 AB-BC
ATCO 25-Jun-18 07:00 26-Jun-18 17:00 1.42 Days
Continuous
766S 701,766S 901T RAS modifications  
ALTALINK 25-Jun-18 13:00 28-Jun-18 17:00 3.17 Days
Continuous
1034L (324s - 244s) GOI SCADA system upgrade  
ALTALINK 09-Jul-18 09:15 19-Jul-18 17:45 10.35 Days
Continuous
754L (245s - 754L65A) GOI Structure Replacements  
ALTALINK 09-Jul-18 13:00 12-Jul-18 17:00 3.17 Days
Continuous
1087L (324s - A2075s) GOI SCADA system upgrade  
ALTALINK 16-Jul-18 11:00 26-Jul-18 16:00 10.21 Days
Continuous
1112L (89s-289s) - Advice 89s1452 Breaker Replacement, 89s81 PT Replacement  
ALTALINK 16-Jul-18 13:00 19-Jul-18 17:00 3.17 Days
Continuous
1088L (324s - A2075s) GOI SCADA system upgrade  
BCH 17-Jul-18 09:00 19-Jul-18 17:00 2.33 Days
Continuous
2L113 (B1s Natal - B2s Cranbrook) Placeholder for Annual Plan Request F19 AB-BC
ALTALINK 23-Jul-18 09:15 02-Aug-18 17:45 10.35 Days
Continuous
754L (437s - 754L75) GOI Structure Replacements  
ALTALINK 23-Jul-18 13:00 26-Jul-18 17:00 3.17 Days
Continuous
1051L (324s - 28s) GOI SCADA system upgrade  
BCH 27-Jul-18 09:00 03-Sep-18 17:00 38.33 Days
Continuous
5L71 (Mica Creek - Nicola) Placeholder for MCA Switchgear Roof Replacement AB-BC
SUNCOR 30-Jul-18 09:00 17-Aug-18 18:00 18.38 Days
Continuous
29PL9-14 (29EDD-56 - 29EDD-34) 5 year maintenance on breakers, bus CT and switches  
BCH 06-Aug-18 09:00 10-Aug-18 17:00 4.33 Days
Continuous
2L294 (Nelway - A.A. Lambert) Placeholder for Annual Plan Request F19 AB-BC
ALTALINK 13-Aug-18 07:30 14-Aug-18 17:30 1.42 Days
Continuous
805L) - GOI *pl,86s T1 & 138kV Bus (804 Replace failed PT  
ATCO 13-Aug-18 09:00 26-Aug-18 18:00 13.38 Days
Continuous
840S McNeill Station 2018 McNeill Fall T/A. Arrestor install and Bird Proofing AB-SK
ALTALINK 13-Aug-18 11:00 23-Aug-18 16:00 10.21 Days
Continuous
1057L (89s-E657s) - Advice 89s452 Breaker Replacement, 89s73 PT Replacement  
BCH 14-Aug-18 09:00 17-Aug-18 17:00 3.33 Days
Continuous
5L96 (Selkirk - Vaseux Lake) Placeholder for Annual Plan Request F19 AB-BC
SUNCOR 20-Aug-18 09:00 07-Sep-18 18:00 18.38 Days
Continuous
29PL9-15 (29EDD-56 - 29EDD-34) 5 year maintenance on breakers, bus CT and switches  
ATCO, SUNCOR 01-Sep-18 09:00 04-Sep-18 18:00 3.38 Days
Continuous
29PL9-1 (29EDD-1 Millennium - 848s Ruth Lake),29PL9-3 (29EDD-1 Millennium - 29EDD-3) maintenance - replacement of 29CT-5  
ALTALINK 10-Sep-18 08:00 27-Sep-18 17:00 17.38 Days
Continuous
62s T5 GOI Protection upgrade  
ATCO 10-Sep-18 09:00 14-Sep-18 17:00 4.33 Days
Continuous
801S 901T 801S Anderson 901T Re-test Sept 10, 2018  
BCH 10-Sep-18 09:00 14-Sep-18 17:00 4.33 Days
Continuous
1L274 (B1s BCH Natal - 1D1L274) 2018 annual plan work AB-BC
SUNCOR 10-Sep-18 09:00 21-Sep-18 18:00 11.38 Days
Continuous
260kV bus 29PP-45 (29EDD-34) 5 year maintenance on 29PP-45 bus  
MONTANA 17-Sep-18 08:00 20-Sep-18 18:00 3.42 Days
Continuous
MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
ALTALINK 17-Sep-18 09:00 20-Sep-18 18:00 3.38 Days
Continuous
1201L (520s Bennett - BCH Cranbrook) Maintenance Components AB-BC
MONTANA 24-Sep-18 08:00 27-Sep-18 18:00 3.42 Days
Continuous
MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
ALTALINK 24-Sep-18 09:00 27-Sep-18 18:00 3.38 Days
Continuous
1201L (520s Bennett - BCH Cranbrook) Maintenance Components AB-BC
SUNCOR 24-Sep-18 09:00 05-Oct-18 18:00 11.38 Days
Continuous
29PL9-14 (29EDD-56 - 29EDD-34),29PL9-15 (29EDD-56 - 29EDD-34) maintenance on bus 29PP-41F  
MONTANA 01-Oct-18 11:00 04-Oct-18 18:00 3.29 Days
Continuous
MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
ALTALINK 01-Oct-18 12:00 04-Oct-18 18:00 3.25 Days
Continuous
1201L (520s Bennett - BCH Cranbrook) Maintenance Components AB-BC
SUNCOR 02-Oct-18 09:00 12-Oct-18 18:00 10.38 Days
Continuous
29PL9-2 (29EDD-1 Millennium - 848s Ruth Lake) maintenance on 29CTT-1 in 29EDD-1  
ATCO 08-Jan-19 07:00 11-Jan-19 17:30 3.44 Days
Continuous
9L01 9L01 Cut in for in and out addition of 951S Thickwood Hills substation. Remove bypass at substation.  
ATCO 15-Jan-19 07:00 18-Jan-19 17:30 3.44 Days
Continuous
9L07 Cut in 951S Thickwood Hills substation.  
ATCO 02-May-19 07:00 02-May-19 17:00 10 Hours
Continuous
6L57 Install temp bypass for construction of new Kinuso substation  
ATCO 03-Jun-19 09:00 29-Jul-19 17:00 56.33 Days
Continuous
840S McNeill Station 2019 McNeill Fall T/A. Arrestor install and Bird Proofing AB-SK

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

Prepared On: 2018-02-16   5:05:37 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.

© 2009 Alberta Electric System Operator. All rights reserved