Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2018-03-24

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.

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Owner From To Duration Element Scheduled Activity Affected Intertie
ALTALINK 06-Feb-18 10:00 30-Mar-18 15:30 52.19 Days
Continuous		 526L (268s Whitecourt - 526DL185) work between structures 1 - 151  
ALTALINK 04-Mar-18 20:00 06-Apr-18 17:00 32.83 Days
Daily		 289s 1552 (289s Saunders Lake) PT emergency repair - forced outage  
ALTALINK 25-Mar-18 08:00 28-Mar-18 14:30 3.27 Days
Continuous		 69s T4 (69s North Barrhead),69s 713 (69s North Barrhead) Replace 69s713 breaker fail protection.  
ATCO 26-Mar-18 08:00 28-Mar-18 17:00 2.38 Days
Daily		 7L32 (811s Clairmont Lake - 862s South Bezanson) replace rotten crossarms from inspection  
ALTALINK 26-Mar-18 08:00 30-Mar-18 17:00 4.38 Days
Continuous		 510s ACF14 (510s Sunnybrook) ACF 14 Shunt Reactor Inspection and leak repair.  
Syncrude 26-Mar-18 08:00 01-Apr-18 18:00 6.42 Days
Continuous		 AL-1 (D05 Syncrude - Aurora) line maintenance  
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  
ENMAX, ALTALINK 26-Mar-18 09:15 28-Mar-18 17:45 2.35 Days
Continuous		 918L (281s Johnson - 162s Beddington) Component Replacement  
ENMAX, ALTALINK 26-Mar-18 12:00 26-Mar-18 18:00 6 Hours
Continuous		 23.80L (74s Janet - ENMAX 23),23.4TR (ENMAX 23) Spring Substation Washing  
ALTALINK 27-Mar-18 08:00 27-Mar-18 17:00 9 Hours
Daily		 5s7E Advice for AltaLink Maintain 5s71 circuit switcher and airbreak  
ALTALINK 27-Mar-18 09:00 27-Mar-18 18:00 9 Hours
Daily		 931L (132s Ware Junction - 28s West Brooks) 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  
ATCO 27-Mar-18 10:00 28-Mar-18 12:00 26 Hours
Continuous		 939s 911 (939s Livock) 939S 911 Pole 1 Repair SF6 Leak

Repair Leaking Breaker Pole

The Phase Shifting Transformer will be out of service		  
ALTALINK 27-Mar-18 23:00 28-Mar-18 03:00 4 Hours
Continuous		 62s11 (62s Brazeau) maintenance  
ALTALINK 28-Mar-18 03:01 28-Mar-18 07:00 3.98 Hours
Daily		 62s12 (62s Brazeau) maintenance  
ATCO 28-Mar-18 12:30 29-Mar-18 15:00 26.5 Hours
Continuous		 939s 904 (939s Livock) 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 28-Mar-18 15:30 28-Mar-18 17:30 2 Hours
Daily		 913L (69s North Barrhead - 732s Mitsue),69s 913N (69s North Barrhead) Trip test from new 69s713 breaker fail protection  
ENMAX, ALTALINK 31-Mar-18 08:00 01-Apr-18 18:00 1.42 Days
Continuous		 36.81L (44s Bearspaw - ENMAX 36),7.84L (ENMAX 36 - ENMAX 7),36.1TR (ENMAX 36),36.3TR (ENMAX 36),36B138-36BT3 (ENMAX 36) HV SW/MD Maintenance 36.1MD, SW88, SW89, SW90, SW83. doble 36PT138-Z31-C? Spring Substation Washing  
ALTALINK, ATCO 02-Apr-18 08:00 06-Apr-18 13:00 4.21 Days
Continuous		 69s 723E (69s North Barrhead),69s 230W (69s North Barrhead),7L230 (69s North Barrhead - 7L230 tap),723L (69s North Barrhead - 723L133),69s T5 (69s North Barrhead) Replace 69s13 & 69s15. Replace 69s723W breaker fail protection.  
Syncrude 02-Apr-18 08:00 12-Apr-18 18:00 10.42 Days
Continuous		 D05 T1 (D05 Syncrude) will be isolated
from Primary and Secondary for
5 Yr PM.		  
ENMAX 02-Apr-18 08:00 13-Apr-18 16:00 11.33 Days
Continuous		 35.81L (42s Sarcee - ENMAX 35) Request from road contractor to install girders on a bridge south of 42s  
ENMAX 02-Apr-18 09:00 11-Apr-18 09:00 9 Days
Continuous		 ENMAX 25 B240-D131 (ENMAX 25),ENMAX 25 B240-D132 (ENMAX 25) switch repair  
ENMAX 02-Apr-18 10:00 11-Apr-18 10:00 9 Days
Continuous		 ENMAX 25 B240-D141 (ENMAX 25),ENMAX 25 B240-D140 (ENMAX 25),ENMAX 25 MD240-3GSU (ENMAX 25) testing  
EPCOR 03-Apr-18 07:00 20-Apr-18 17:00 17.42 Days
Continuous		 805s T1 (805s Jasper) Manhole resurfacing  
ATCO 03-Apr-18 08:00 05-Apr-18 17:00 2.38 Days
Daily		 7L32 (862s South Bezanson - 813s Little Smoky) replace rotten crossarms from inspection  
ALTALINK 04-Apr-18 07:00 04-Apr-18 18:00 11 Hours
Continuous		 730L (285s East Camrose - 730L62) Installing bird diverters  
ALTALINK 04-Apr-18 08:00 11-Apr-18 16:00 7.33 Days
Continuous		 936L (102s Langdon - 5s East Calgary) Green Line LRT Project  
ENMAX, ALTALINK 04-Apr-18 08:00 11-Apr-18 16:00 7.33 Days
Continuous		 937L (102s Langdon - 5s East Calgary) Green Line LRT Project  
SUNCOR 05-Apr-18 16:00 11-Apr-18 18:00 6.08 Days
Continuous		 30EDD-1-623 (30EDD-1),30EDD-1-624 (30EDD-1),30EDD-1-625 (30EDD-1),30EDD-1-626 (30EDD-1) line maintenance and protection  
ALTALINK 07-Apr-18 09:00 07-Apr-18 11:00 2 Hours
Daily		 69s T4 (69s North Barrhead),69s 713 (69s North Barrhead) Trip test from new 69s723E breaker fail protection  
ALTALINK 08-Apr-18 08:00 19-Apr-18 18:00 11.42 Days
Continuous		 38s East Edmonton 240 kV Bus 1,38s T1 (38s East Edmonton) Replacement of T1, Replacement of 38s50 switch including new structure and foundations  
EPCOR 09-Apr-18 07:00 13-Apr-18 17:00 4.42 Days
Continuous		 987s T3 (987s Clover Bar) Doble  
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 09:30 07-May-18 18:00 28.35 Days
Continuous		 320p 1352 (320p Keephills) [KATR]-Installing new line protection for 3-terminal scheme and functional testing; repairing 320p212  
ALTALINK 09-Apr-18 10:00 12-Apr-18 15:00 3.21 Days
Continuous		 190L (17s Benalto - 320p Keephills),17s Benalto 240 kV North Bus 1 17s190N Switch Replacement - Bus needed due to Proximity / Approach  
ALTALINK 09-Apr-18 12:00 12-Apr-18 18:00 3.25 Days
Continuous		 938L (77s Sagitawah - 809s Louise Creek),77s 40 (77s Sagitawah) 240kV CT replacement & 77s40 mtce.  
ENMAX 11-Apr-18 11:00 18-Apr-18 09:00 6.92 Days
Continuous		 ENMAX 25 MD240-2GSU (ENMAX 25),ENMAX 25 B240-D135 (ENMAX 25),ENMAX 25 B240-D134 (ENMAX 25) testing  
SUNCOR 12-Apr-18 08:00 17-Apr-18 17:00 5.38 Days
Continuous		 30EDD-1-621 (30EDD-1),30EDD-1-622 (30EDD-1),30EDD-1-623 (30EDD-1),29PL6-4 (836s Steepbank - 29EDD-1) line maintenance and protection  
ALTALINK 12-Apr-18 15:00 16-Apr-18 16:00 4.04 Days
Continuous		 17s Benalto 240 kV North Bus 1,903L (17s Benalto - 320p Keephills) 17s903N Switch Replacement - Bus needed due to Proximity / Approach  
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		 557s T2 (557s Castle Downs) Calisto Install  
EPCOR 16-Apr-18 07:00 20-Apr-18 17:00 4.42 Days
Continuous		 987s T4 (987s Clover Bar) Doble  
ATCO 16-Apr-18 07:00 07-Jun-18 17:00 52.42 Days
Continuous		 7L23 (732s Mitsue - 858s Narrows Creek),732s 703 (732s Mitsue),732s 701 (732s Mitsue),732s 702 (732s Mitsue),732s 901T (732s Mitsue),7L49 (732s Mitsue - 729s Otauwau) Replace breaker 702 and CT's and Breaker 703 and CT's

April 16-24 GOI 2-43738A Outage on 702, 703, 7L49 open ended
Isolation points:702A, 703A, 7L49D1 @732S Mitsue

April 24-May 3 GOI 2-43738B Expand Outage to include 7L49, 7L23, 901T
Isolation points:901TD, 500D1, 701A, 707B, 7L49D1, 7L23D4

May 3-Jun 1 GOI 2-43738C Reduce Isolation zone to include Breaker 702, 703, 7L49 open ended
Isolation points:702A, 703A, 7L49D1		  
ALTALINK 16-Apr-18 07:30 18-Apr-18 17:30 2.42 Days
Continuous		 367s T1 (367s Harry Smith) [SWEATD] Tap changer gas piping modification  
ALBIAN, ATCO 18-Apr-18 07:00 02-May-18 17:00 14.42 Days
Continuous		 919s 908 (919s Hartley),847s 902T (847s Muskeg River) Transformer protection upgrade during planned generator turnaround.  
ALTALINK 19-Apr-18 07:30 21-Apr-18 17:30 2.42 Days
Continuous		 367s T2 (367S Harry Smith) [SWEATD] Tap changer gas piping modification  
EPCOR 20-Apr-18 07:00 20-Apr-18 17:00 10 Hours
Continuous		 987S Clover Bar 240 kV Bus 2 Doble  
EPCOR 23-Apr-18 07:00 24-Apr-18 17:00 1.42 Days
Continuous		 803s T1 (803s Lambton) Cutover of new relay protection  
EPCOR 23-Apr-18 07:00 27-Apr-18 17:00 4.42 Days
Continuous		 814s T1 (814s Bellamy) Doble  
EPCOR 23-Apr-18 07:00 27-Apr-18 17:00 4.42 Days
Daily		 987s C2406 (987s Clover Bar) Maint  
ALTALINK 23-Apr-18 07:00 03-May-18 18:00 10.46 Days
Continuous		 166s 862N (166s Dow Chem Fort Saskatchewan),166s 899N (166s Dow Chem Fort Saskatchewan),166s T1 (166s Dow Chemical Fort Saskatchewan) Replace CT4 and replace 166s8, maintenance on T1  
ALTALINK 23-Apr-18 07:30 25-Apr-18 17:30 2.42 Days
Continuous		 289s T2 (289s Saunders Lake) [SWEATD] Tap changer gas piping modification  
BCH 23-Apr-18 09:00 27-Apr-18 17:00 4.33 Days
Continuous		 5L51 (Ingledow - Custer) ING 5D23 cutting over controls and replace failed glass on 9 structures AB-BC
ALTALINK 23-Apr-18 10:00 30-Apr-18 12:00 7.08 Days
Continuous		 916L (42s Sarcee - 5s East Calgary) [SWCRR] Enter settings and commissioning of point on wave controller for 42s916E breaker  
SUNCOR 24-Apr-18 08:00 01-May-18 18:00 7.42 Days
Continuous		 30EDD-1-627 (30EDD-1),30EDD-1-628 (30EDD-1),30EDD-1-629 (30EDD-1),30EDD-1-626 (30EDD-1) line maintenance and protection  
ALTALINK 24-Apr-18 10:30 26-Apr-18 14:00 2.15 Days
Continuous		 28s T2 (28s West Brooks) Maintain, doble and SFRA T2  
ALTALINK, EPCOR 25-Apr-18 07:00 27-Apr-18 18:00 2.46 Days
Continuous		 809L (320p Keephills - 510s Sunnybrook) [KATR]-Moving a portion of 1043L in preparation for 1045L to terminate at 320P  
ALTALINK, EPCOR 25-Apr-18 07:00 01-May-18 18:00 6.46 Days
Continuous		 1043L (320p Keephills - 367s Harry Smith) [KATR]-Re-configure part of 1043L into 320p1352 bay  
ENMAX, ALTALINK 25-Apr-18 08:00 25-Apr-18 16:00 8 Hours
Continuous		 37.82L (74s Janet - ENMAX 37) HV breaker maintenance 7B138-7.82, SF6 gas sample 7B138-7.82  
ATCO 25-Apr-18 08:30 25-Apr-18 15:30 7 Hours
Continuous		 930s SVC (930s Arcenciel) Complete SVC Air Cooling Inspection and Adjustment And Complete Breaker 401 Partial PM, SVC Offline for the Duration of the Work  
ALTALINK 25-Apr-18 08:30 25-Apr-18 17:00 8.5 Hours
Daily		 17s T1 (17s Benalto) Maintain, doble and SFRA T1  
ALTALINK 25-Apr-18 10:00 25-Apr-18 14:00 4 Hours
Daily		 42s C2 (42s Sarcee),42s C3 (42s Sarcee) [SWCRR] C2 and C3 Cap banks are required as part of the commissioning of the the new 42s 916L POW controller  
EPCOR 26-Apr-18 07:00 27-Apr-18 17:00 1.42 Days
Continuous		 803s T2 (803s Lambton) Cutover of new relay protection  
ALTALINK 26-Apr-18 07:30 28-Apr-18 17:30 2.42 Days
Continuous		 289s T1 (289s Saunders Lake) [SWEATD] Tap changer gas piping modification  
ALTALINK 26-Apr-18 08:30 26-Apr-18 17:00 8.5 Hours
Daily		 900L (63s Red Deer - 17s Benalto) 17s900E Unable to open and needs to be adjusted  
ATCO 29-Apr-18 07:00 29-Apr-18 17:00 10 Hours
Continuous		 7L69 (815s Goodfare - 731s Elmworth),815s 704 (815s Goodfare) protection upgrade  
EPCOR 30-Apr-18 07:00 04-May-18 17:00 4.42 Days
Continuous		 814s T2 (814s 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 (2029s Heathfield - 2075s Newell) 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		 63s 452 (63s Red Deer) Maintain minimum oil breaker 240kV ABB HLRE.  
ALTALINK 30-Apr-18 12:30 02-May-18 17:30 2.21 Days
Continuous		 320p 1352 (320p Keephills) 320p1352 A,B,C (CB1246) SF6 240kV HGF ADD: 320P212 Needs Adjustment  
EPCOR 02-May-18 07:00 02-May-18 17:00 10 Hours
Continuous		 52sE2402 (52s East Industrial) Maint  
ALTALINK 02-May-18 07:00 07-May-18 18:00 5.46 Days
Continuous		 1045L (320p-310p-E805s) - GOI [KATR] [KATR]-Terminating 1045L into 320p1352  
ALTALINK 02-May-18 08:30 02-May-18 16:00 7.5 Hours
Daily		 199s 688 (199s East Airdrie),688L (199s East Airdrie - 688DL23) Maintain 138kV SF6 breaker  
EPCOR 03-May-18 07:00 05-May-18 18:00 2.46 Days
Continuous		 ALTALINK - REQUIRES ISOLATION @ JASPER - JDS27,JDS12 Terminating 1045L into 320p1352  
ALTALINK 05-May-18 07:00 19-May-18 18:00 14.46 Days
Continuous		 510s 2852 (510s Sunnybrook) Installing foundation for the new 510s2952 and associated equipment  
ALTALINK 05-May-18 15:01 05-May-18 17:00 119 Mins
Daily		 38s72 (38s73 brkr) Advice Trip test from 38s62 breaker fail  
EPCOR 07-May-18 07:00 11-May-18 17:00 4.42 Days
Continuous		 805s T3 (805s 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
ALTALINK 08-May-18 07:00 08-May-18 12:00 5 Hours
Daily		 199L (347s - 259s - 199L187B) - GOI Creating Open Point 'A' @ Structure 187A  
ALTALINK 08-May-18 07:00 24-May-18 12:00 16.21 Days
Continuous		 199L (347s - Open Point 'A') - GOI Installing a new airbrake switch 199L187A  
ATCO 08-May-18 09:00 09-May-18 16:00 31 Hours
Continuous		 800s 701 (800s Friedenstal),7L75 (A793s West Peace River - 800s Friedenstal) BREAKER MIN OIL HLR PARTIAL TESTING @ FRIEDENSTAL 800S 701

Complete Partial PM on Breaker 701

7L75 open ended for the duration of the work		  
ATCO 10-May-18 09:00 11-May-18 16:00 31 Hours
Continuous		 7L73 (829s Boucher Creek - 800s Friedenstal),800s 702 (800s Friedenstal) BREAKER MIN OIL HLR PARTIAL TESTING @ FRIEDENSTAL 800S 702

Complete Partial PM on Breaker 702

7L73 open ended for the duration of the work		  
ATCO 14-May-18 10:00 18-May-18 14:00 4.17 Days
Continuous		 959S SVC (959s Lanfine) SVC warranty repair work- GE Repairs/Modifications, SVC will not be available for duration of outage  
ALTALINK 14-May-18 12:30 16-May-18 13:30 2.04 Days
Continuous		 338s 252 (338s Cherhill) 338s252 maint  
ATCO 15-May-18 08:30 15-May-18 16:30 8 Hours
Continuous		 786s SVC (786s High Level) Complete Inspection and Adjustment of SVC Air Cooling, SVC Off LIne for the Duration of the Work  
ALTALINK 16-May-18 07:30 16-May-18 18:00 10.5 Hours
Daily		 37s71 (37s North Calder),905L (19s Wabamun - 37s North Calder) 60 deg hot spot.  
ENMAX, ALTALINK 17-May-18 08:00 17-May-18 16:00 8 Hours
Continuous		 21.80L (42s Sarcee - ENMAX 21) SF6 gas sample 21B138-21.80  
ALTALINK 17-May-18 08:30 17-May-18 16:30 8 Hours
Daily		 71s 1652 (71s Lamoureux) Hotspot All Phases (60deg)-71s35  
EPCOR 22-May-18 07:00 08-Jun-18 17:00 17.42 Days
Continuous		 511s Victoria T5 (511s Victoria),CV5 (557s Castle Downs - 511s Victoria) Doble / Cable, manhole inspection.  
ALTALINK 22-May-18 08:45 25-May-18 17:45 3.38 Days
Continuous		 28s 138kV Bus 1 & T1 – GOI,28s T1 (28s West Brooks) CT Wiring of T1, 28s22, 28s31 & Trip Tests for B Protection Addition  
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
AESO 22-May-18 09:30 25-May-18 16:30 3.29 Days
Continuous		 787L (166s Dow Chemical Fort Saskatchewan - 71s Lamoureux) Replace PT's  
ALTALINK 23-May-18 07:30 24-May-18 17:30 1.42 Days
Continuous		 973L (39s Bickerdike - 310p Sundance) Replace 1 PT @ 310p.  
ALTALINK 23-May-18 09:00 24-May-18 16:30 31.5 Hours
Continuous		 250P 1 (250P Bighorn Plant) Maintain 138kV minimum oil breaker  
ALTALINK 24-May-18 07:00 24-May-18 12:00 5 Hours
Daily		 199L (347s - 259s - 199L187B) - GOI Closing Open Point 'A' @ Structure 187A  
EPCOR 24-May-18 07:00 29-May-18 17:00 5.42 Days
Continuous		 987s GDS3 (987s Cloverbar) maintenance  
ALTALINK 25-May-18 11:00 25-May-18 13:30 2.5 Hours
Daily		 28s R1 (28s West Brooks),28s 44 (28s West Brooks) Trip Test Required for Bus Protection Addition  
ALTALINK 25-May-18 12:30 25-May-18 14:30 2 Hours
Daily		 28s 41 (28s West Brooks) Trip Test Required for Bus Protection Addition  
ALTALINK 25-May-18 14:30 25-May-18 16:30 2 Hours
Daily		 28s 8 (28s West Brooks) Trip Test Required for Bus Protection Addition  
EPCOR 28-May-18 07:00 28-May-18 17:00 10 Hours
Continuous		 240BA3 (814s Bellamy - 629s Argyll Transfer Station),1055L (816s Petrolia - 629s Argyll Transfer Station) Doble  
ALTALINK 28-May-18 08:45 31-May-18 17:45 3.38 Days
Continuous		 28s T2 (28s West Brooks),28s 138kV Bus 2 & T2 – GOI CT Wiring of T2, 28s55, 28s81 & Trip Tests For B Protection Addition  
ALTALINK, EPCOR 28-May-18 09:30 31-May-18 16:30 3.29 Days
Continuous		 921L (71s Lamoureux - 987s Clover Bar) Replace PT's  
ALTALINK, EPCOR 29-May-18 07:00 29-May-18 17:00 10 Hours
Continuous		 920L (37s North Calder - 557s Castle Downs) Doble  
ATCO 29-May-18 07:00 31-May-18 17:00 2.42 Days
Continuous		 757s 702 (757s Battle River),7L702 (137s Sedgewick - 757s Battle River) install and test protection  
ALTALINK 29-May-18 07:00 31-May-18 18:30 2.48 Days
Continuous		 828L (178s Cynthia - 489s Petro Canada Brazeau River),489s T1 (489s Petro Canada Brazeau River) 489s maint Tx18558 LTC FPE/ASEA 138/4.16 ADD: 489s16 west phase adjustment, 489s T1 Moisture in liquid temp gauge, 489s T1 LTC sweating, 489sT1 Hydran Sensor Failed, 489sT1 MT Conservator Moisture in Gauge, 489s T1 TC door gasket  
ATCO 30-May-18 07:00 01-Jun-18 17:30 2.44 Days
Continuous		 9L46 (932s Pemukan - 959s Lanfine) attach new line 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  
ALTALINK 31-May-18 12:30 31-May-18 15:00 2.5 Hours
Daily		 28s 52 (28s West Brooks) Trip Test Required for Bus Protection Addition  
ALTALINK 31-May-18 15:00 31-May-18 16:30 90 Mins
Daily		 28s 2 (28s West Brooks) Trip Test Required for Bus Protection Addition  
ATCO 02-Jun-18 08:00 04-Jun-18 17:00 2.38 Days
Continuous		 791S 702,7L81 Install new 7L81 RASA & RASB  
EPCOR 04-Jun-18 07:00 05-Jun-18 17:00 1.42 Days
Continuous		 805s C1 (805s Jasper) Doble  
ALTALINK 04-Jun-18 09:30 07-Jun-18 17:00 3.31 Days
Continuous		 77s T1 (77s Sagitawah),77s Sagitawah 138 kV West Bus,77s Sagitawah 240 kV West Bus Protection upgrade  
ALTALINK 04-Jun-18 12:00 07-Jun-18 16:30 3.19 Days
Continuous		 841L (477s Amoco West Pembina - 489s Amoco Canada Brazeau River),489s T2 (489s Petro Canada Brazeau River) 489sT2 doble TX 18559 LTC FPE/ASEA 138/4, ADD: 489sT2 maint TX 18559 LTC FPE/ASEA 138/4, 489s T2 Moisture in temp gauge 2, 489sT2 LTC 1" Conservator Valve Leak 90241462, 489s T2 MT 2" Bleed Leaking, 489sT2 MT Conservator Moisture in Gauge, 489s17 requires adjustment, motor/man sw, 489s photo cell not working  
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
EPCOR 06-Jun-18 07:00 07-Jun-18 17:00 1.42 Days
Continuous		 816s P2404 (816s Petrolia) Doble  
CENOVUS 06-Jun-18 07:00 13-Jun-18 18:00 7.46 Days
Continuous		 539s PCB_9202 (539s Sunday Creek) insulator testing  
CENOVUS 06-Jun-18 07:00 13-Jun-18 18:00 7.46 Days
Continuous		 539s PCB_9203 (539s Sunday Creek) insulator testing  
CENOVUS 06-Jun-18 07:00 13-Jun-18 18:00 7.46 Days
Continuous		 539s 9201T (539s Sunday Creek) insulator testing  
ENMAX, ALTALINK 06-Jun-18 08:00 06-Jun-18 16:00 8 Hours
Continuous		 28.80L (42s Sarcee - ENMAX 28) HV breaker maintenance 28B138-28.80, SF6 gas sample 28B138-28.80  
BCH 06-Jun-18 09:00 07-Jun-18 17:00 1.33 Days
Continuous		 1L274 (Elkford - EFT1D22),1L274 (EFT 1D22 - 1D3L274) Annual Plan Request AB-BC
ALTALINK, EPCOR 08-Jun-18 07:00 08-Jun-18 17:00 10 Hours
Continuous		 1044L (805s Jasper - 816s Petrolia) Doble  
ALTALINK 09-Jun-18 07:00 09-Jun-18 17:00 10 Hours
Continuous		 908L (89s Ellerslie - 816s Petrolia) Doble  
ALTALINK 11-Jun-18 08:00 17-Jun-18 17:00 6.38 Days
Continuous		 Valve Hall and T11 GOI,510s DC yard Annual Inspection and Maintenance, Link will be out of service  
ALTALINK 11-Jun-18 08:00 17-Jun-18 17:00 6.38 Days
Continuous		 511s DC yard,Valve Hall and T11 GOI,1325L (510s Sunnybrook - 511s Crossings) Annual Inspection and Maintenance, Link will be out of service  
ALTALINK 11-Jun-18 09:30 14-Jun-18 17:00 3.31 Days
Continuous		 77s Sagitawah 138 kV East Bus,77s T2 (77s Sagitawah),77s Sagitawah 240 kV West Bus Protection upgrade  
ALTALINK 11-Jun-18 13:00 14-Jun-18 17:00 3.17 Days
Continuous		 935L (324s - 356s) GOI SCADA system upgrade  
ALTALINK 17-Jun-18 15:01 17-Jun-18 17:00 119 Mins
Daily		 38s17 (38s18 brkr) Advice Trip test from 3552 breaker fail  
EPCOR 18-Jun-18 07:00 18-Jun-18 17:00 10 Hours
Continuous		 Poundmaker 2401 (Poundmaker) Maint  
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  
EPCOR 19-Jun-18 07:00 19-Jun-18 17:00 10 Hours
Continuous		 Poundmaker 2402 (Poundmaker) Maint  
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
EPCOR 20-Jun-18 07:00 20-Jun-18 17:00 10 Hours
Continuous		 Poundmaker 2403 (Poundmaker) Maint  
EPCOR 21-Jun-18 07:00 21-Jun-18 17:00 10 Hours
Continuous		 Poundmaker 2404 (Poundmaker) Maint  
ALTALINK 25-Jun-18 13:00 28-Jun-18 17:00 3.17 Days
Continuous		 1034L (324s - 244s) GOI SCADA system upgrade  
ALTALINK 04-Jul-18 11:00 05-Jul-18 15:00 28 Hours
Continuous		 748L(277s-267s) and 267s T1 (Tx18304) GO 138kV HGF SF6 gas breaker maintenance @ both ends of 748L  
ATCO 09-Jul-18 08:00 12-Jul-18 17:00 3.38 Days
Continuous		 7L702 (137s Sedgewick - 757s Battle River) Change Arms and Insulators on 7L702  
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  
ATCO 16-Jul-18 08:00 19-Jul-18 17:00 3.38 Days
Continuous		 7L702 (137s Sedgewick - 757s Battle River) Change Arms and Insulators on 7L702  
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
ATCO 23-Jul-18 08:00 26-Jul-18 17:00 3.38 Days
Continuous		 7L702 (137s Sedgewick - 757s Battle River) Change Arms and Insulators on 7L702  
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  
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 03-Aug-18 09:00 12-Sep-18 17:00 40.33 Days
Continuous		 5L71 (Mica Creek - Nicola) Placeholder for MCA Switchgear Roof Replacement AB-BC
ENMAX 06-Aug-18 08:00 17-Aug-18 16:00 11.33 Days
Continuous		 162.1TR (ENMAX 162 Beddington) Tapchanger Inspection. Doble Test Transformer  
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) annual plan request F19 AB-BC
EPCOR 20-Aug-18 07:00 21-Aug-18 17:00 1.42 Days
Continuous		 330p 1201 (330p Genesee) BKR Maint  
ENMAX 20-Aug-18 08:00 31-Aug-18 16:00 11.33 Days
Continuous		 162.2TR (ENMAX 162 Beddington) Tapchanger Inspection. Doble Test Transformer  
BCH 20-Aug-18 09:00 24-Aug-18 17:00 4.33 Days
Continuous		 5L91 (Selkirk - Ashton Creek) annual plan request F19 AB-BC
BCH 20-Aug-18 09:00 31-Aug-18 17:00 11.33 Days
Continuous		 1L274 (EFT - 1D2L274) 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  
ALTALINK, EPCOR 22-Aug-18 07:00 22-Aug-18 17:00 10 Hours
Continuous		 1238L (510s Sunnybrook - 330p Genesee),Sunnybrook BKR Maint  
EPCOR 23-Aug-18 07:00 24-Aug-18 17:00 1.42 Days
Continuous		 330p 1203 (330p Genesee) BKR Maint  
BCH 27-Aug-18 09:00 31-Aug-18 17:00 4.33 Days
Continuous		 5L92 (Cranbrook - Selkirk) annual plan request F19 AB-BC
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  
BCH 03-Sep-18 09:00 14-Sep-18 17:00 11.33 Days
Continuous		 5L98 (BCH Nicola - Vaseux Lake) annual plan request F19 AB-BC
ATCO 04-Sep-18 07:00 25-Nov-18 17:00 82.46 Days
Continuous		 972S 905B 972s 905B  
SHELL, ALBIAN 10-Sep-18 07:00 10-Sep-18 17:00 10 Hours
Continuous		 847s 901T (847s Muskeg River),919s 906 (919s Hartley) Transformer protection upgrade during planned generator turnaround.  
ALTALINK 10-Sep-18 08:00 27-Sep-18 17:00 17.38 Days
Continuous		 62s T5 GOI Protection upgrade  
ALTALINK 10-Sep-18 08:00 27-Sep-18 17:00 17.38 Days
Continuous		 995L (17s Benalto - 995AL tap) Replacement of strain insulators for 995L and post insulators for 17s76, 17s77,CVT(17s78) replacement  
ATCO 10-Sep-18 09:00 14-Sep-18 17:00 4.33 Days
Continuous		 801s 901T (801s Anderson) 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  
ALTALINK, EPCOR 17-Sep-18 07:00 29-Sep-18 18:00 12.46 Days
Continuous		 510s2852 and 510s3052 (1238L) - GOI,510s 2852 (510s Sunnybrook),1238L (510s Sunnybrook - 330p Genesee) Installing new 510s2952, CT's, 510s46, 510s48 and protection/breaker fail mods  
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  
BCH 27-Sep-18 09:00 02-Nov-18 17:00 36.33 Days
Continuous		 5L72 (Mica Creek - Nicola) Placeholder for MCA Switchgear Roof Replacement. AB-BC
ALTALINK 01-Oct-18 08:00 05-Oct-18 18:00 4.42 Days
Continuous		 62s 138 KV Bus Advice Protection upgrade  
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  
BCH 19-Oct-18 15:00 19-Oct-18 17:00 2 Hours
Continuous		 5L52 (Ingledow - Custer) ING 5D25 cutting over controls to new station control equipment AB-BC
ALTALINK 26-Nov-18 07:00 04-Dec-18 18:00 8.46 Days
Continuous		 510s 2852 (510s Sunnybrook),510s2852 and 510s2952 - GOI Closing Open Point 'C' and energizing new VT13 and new reactor bank R3 (72 hour soak test)  
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: 2018-03-14   3:51:13 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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