Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2018-06-09

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 09-May-18 11:30 11-Aug-18 17:00 94.23 Days
Continuous		 902L (19s Wabamun - 310p Sundance) emergency safety requirement  
BCH 22-May-18 09:00 15-Jun-18 17:00 24.33 Days
Continuous		 5L72 (Mica Creek - Nicola) conductor spacer replacement AB-BC
ALTALINK 29-May-18 07:00 12-Jun-18 18:00 14.46 Days
Continuous		 510s 2852 (510s Sunnybrook) installing foundation for new 510s2952 and associated equipment  
SUNCOR 31-May-18 09:00 21-Jun-18 18:00 21.38 Days
Continuous		 29PL6-7 (836s Steepbank - 29EDD-5 29Edd-5),29EDD-5 29Edd-5 5 year maintenance  
Syncrude 04-Jun-18 08:00 10-Jun-18 18:00 6.42 Days
Continuous		 Mildred T3 (Syncrude Mildred Lake),Mildred_335 (Syncrude Mildred Lake) transformer inspection/ oil leak repair  
BCH 05-Jun-18 09:00 15-Jun-18 17:00 10.33 Days
Continuous		 2L294 (Nelway - A.A. Lambert) replacement of defective insulators - BC maintenance does not affect AB ATC AB-BC
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  
EPCOR, ALTALINK 09-Jun-18 09:00 09-Jun-18 17:00 8 Hours
Continuous		 908L @ Petrolia - Ellerslie,908L (89s Ellerslie - 816s Petrolia) Doble  
ALTALINK 11-Jun-18 09:30 14-Jun-18 17:00 3.31 Days
Continuous		 77s Sagitawah 138 kV East Bus,77s Sagitawah 240 kV East Bus,77s 29 (77s Sagitawah),77s 40 (77s Sagitawah),77s 57 (77s Sagitawah),77s 652 (77s Sagitawah),77s 752 (77s Sagitawah),77s T2 (77s Sagitawah) Protection upgrade  
ALTALINK 11-Jun-18 10:30 14-Jun-18 13:00 3.1 Days
Continuous		 1002L (163s-275s) - Advice,1002L (275s Jenner - 163s Amoco Empress) Replace 2 Phase of PT for 163s22  
ALTALINK 11-Jun-18 10:30 14-Jun-18 19:00 3.35 Days
Continuous		 19s T10 & 240kV Buses - GOI,19s T10 (19s Wabamun) Replace 905L Post Insulators and 19s97 Pantagraph Switch. Entire 240kV Buses outage required due to proximately clearance etc...  
ALTALINK 11-Jun-18 13:00 14-Jun-18 17:00 3.17 Days
Continuous		 935L (324s Cassils - 356s Milo) SCADA system upgrade  
Syncrude 12-Jun-18 08:00 12-Jun-18 18:00 10 Hours
Continuous		 Aurora T-11 replace metering PT  
ATCO 13-Jun-18 07:00 13-Jun-18 19:00 12 Hours
Continuous		 844S T1 FEEDER,844S T2 FEEDER maintenance  
SUNCOR 14-Jun-18 08:00 15-Jun-18 17:00 1.38 Days
Continuous		 635PT-1000 (635EDD-1000),635PL9-1000 (2005s Secord - 635EDD-1000) troubleshoot the transformer alarms  
EPCOR 16-Jun-18 05:30 17-Jun-18 18:00 1.52 Days
Continuous		 1055L (816s Petrolia - 629s Argyll Transfer Station) Washing Program  
EPCOR 18-Jun-18 07:00 18-Jun-18 17:00 10 Hours
Continuous		 Poundmaker 2401 (Poundmaker) Maint  
Syncrude 18-Jun-18 08:00 24-Jun-18 18:00 6.42 Days
Continuous		 Aurora T1 5 year maintenance  
ALTALINK 18-Jun-18 08:30 19-Jun-18 18:00 1.4 Days
Continuous		 514L (396s-322s-513s) GOI,514BL (322s Cowley Ridge Wind Plant - 514L tap),514L (396s Pincher Creek - 514BL tap),514L (513s Lundbreck - 514L198) Place new 396s514N breaker and install LA's  
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
ATCO 18-Jun-18 10:00 22-Jun-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 18-Jun-18 10:30 28-Jun-18 08:30 9.92 Days
Daily		 163s T1 (163s Amoco Empress),163s T1 TX18483- GOI Replace T1 A/B Protections  
ALTALINK 18-Jun-18 13:00 21-Jun-18 17:00 3.17 Days
Continuous		 1052L (28s West Brooks - 324s Cassils) SCADA system upgrade  
EPCOR 19-Jun-18 07:00 19-Jun-18 17:00 10 Hours
Continuous		 Poundmaker 2402 (Poundmaker) Maint  
ATCO 19-Jun-18 07:00 21-Jun-18 17:00 2.42 Days
Continuous		 7L702 (137s Sedgewick - 757s Battle River),757S 708 Install and test transfer trip from Altalink  
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
ALTALINK 19-Jun-18 09:30 21-Jun-18 16:00 2.27 Days
Continuous		 603L (138s Windy Flats - 243s Soderglen Wind Farm),608L (138s Windy Flats - 418s Ardenville - 528s Blue Trail Wind Farm),138S T2 (138s Windy Flats),138s 138 kV Bus 2 GOI Upgrade station service for arc flash.  
ALTALINK 19-Jun-18 17:00 21-Jun-18 18:00 2.04 Days
Continuous		 514L (396s Pincher Creek - 514BL tap),396s 514N (396s Pincher Creek),396s514N GOI Replace breaker, and add LA’s  
EPCOR 20-Jun-18 07:00 20-Jun-18 17:00 10 Hours
Continuous		 Poundmaker 2403 (Poundmaker) Maint  
ATCO 20-Jun-18 07:00 21-Jun-18 17:00 1.42 Days
Continuous		 6L126 (515L tap - 743s Sarah Lake),6L11,6L96,743S 600BS2,743S 600BS1 Replace insulators and bus PT's, Switch maintenance  
ATCO 20-Jun-18 11:00 20-Jun-18 17:00 6 Hours
Continuous		 741S 701,7L90 (813s Little Smoky - 741s Fox Creek) Top up low SF6 on One Pole, if pole gets much lower it will alarm, If too low it will go to lockout and block operation.  
EPCOR 21-Jun-18 07:00 21-Jun-18 17:00 10 Hours
Continuous		 Poundmaker 2404 (Poundmaker) Maint  
ALTALINK 21-Jun-18 16:00 21-Jun-18 17:00 60 Mins
Daily		 514L (396s Pincher Creek - 514BL tap),185L (396s Pincher Creek - 379s Shell Canada Waterton),396s 69kV Bus De-energize (T1,185L,514 Open 396s 69kV bus breakers to remotely test energize new 396s514N breaker  
ALTALINK 21-Jun-18 16:00 21-Jun-18 18:00 2 Hours
Daily		 38s 18 (38s East Edmonton),38s T4 (38s East Edmonton),38s17 (38s18 brkr) Advice Trip test from 3552 breaker fail  
ATCO 22-Jun-18 08:00 22-Jun-18 12:00 4 Hours
Continuous		 959S SVC (959s Lanfine) Lanfine SVC - system tests  
ALTALINK, EPCOR 23-Jun-18 07:00 24-Jun-18 18:00 1.46 Days
Continuous		 1056L (89s Ellerslie - 629s Argyll Transfer Station) Washing Program  
EPCOR 25-Jun-18 07:00 29-Jun-18 17:00 4.42 Days
Continuous		 805s T3 (805s Jasper) Doble  
ATCO 25-Jun-18 07:00 29-Jun-18 18:00 4.46 Days
Continuous		 9L913 (69s North Barrhead - 732s Mitsue) Cutting over to a temporary section of 9L913 line to allow rebuilding of current section of line due to 12L41 500KV right-of-way requirements.  
ATCO 25-Jun-18 10:00 28-Jun-18 15:00 3.21 Days
Continuous		 932S 901T,932s 901T (932s Pemukan) 932S - 901T Leak Repairs  
ALTALINK 25-Jun-18 12:00 26-Jun-18 17:00 29 Hours
Continuous		 28s T2 (28s West Brooks),28s T2(Tx 18775) GOI Urgent trouble corrective:change qualitrol.  
ALTALINK, ENMAX 25-Jun-18 12:00 28-Jun-18 16:00 3.17 Days
Continuous		 74s23.80 GOI,23.80L (74s Janet - ENMAX 23),74s 23.80W (74s Janet) Maintain 138kV minimum oil breaker S&S HPF.  
ALTALINK 25-Jun-18 13:00 28-Jun-18 17:00 3.17 Days
Continuous		 1034L (324s - 244s) Advice,1034L (244s Bowmanton - 324s Cassils) SCADA system upgrade  
ALTALINK 26-Jun-18 07:30 26-Jun-18 10:00 2.5 Hours
Daily		 17s 4 (17s Benalto),17s4 & 17s34 - Advice Apply voltage settings threshold for the 17s3 breaker  
ALTALINK 26-Jun-18 08:00 26-Jun-18 12:45 4.75 Hours
Daily		 76L (115s Mt. Allan - 33s Spray),76L (115s - 33s) GOI plates on all three dead ends to be replaced (76L dead ends at 115s)  
ALTALINK 26-Jun-18 10:00 26-Jun-18 12:30 2.5 Hours
Daily		 17s3 & 17s23 - Advice,17s 3 (17s Benalto) Apply voltage settings threshold for the 17s3 breaker  
ALTALINK 26-Jun-18 12:30 26-Jun-18 14:30 2 Hours
Daily		 17s 5 (17s Benalto),17s5 & 17s35 - Advice Apply voltage settings threshold for the 17s5 breaker  
ALTALINK 26-Jun-18 14:30 26-Jun-18 17:00 2.5 Hours
Daily		 17s6 & 17s26 - Advice,17s 6 (17s Benalto) Apply voltage settings threshold for the 17s5 breaker  
ALTALINK 27-Jun-18 07:00 13-Jul-18 18:00 16.46 Days
Continuous		 708L (233s Beamer - 708L88N),708L (233s - 708L88N) - GOI Installing new switch 708L89  
ALTALINK 27-Jun-18 08:00 27-Jun-18 10:00 2 Hours
Daily		 760L (163s-394s)- GOI,163s 760X (163s Amoco Empress),760L (394s Empress - 163s Amoco Empress) Trip Test 163s760X Required for T1 Protection Replacement  
ALTALINK 27-Jun-18 08:30 28-Jun-18 12:00 27.5 Hours
Continuous		 103s T1 (103s Goose Lake),103s T1(Tx 18776) GOI Urgent trouble corrective:change qualitrol.  
ALTALINK 27-Jun-18 09:30 27-Jun-18 17:00 7.5 Hours
Daily		 17s4 - GOI,17s 4 (17s Benalto) Fix Sync Check Function for 17s4 breaker  
ALTALINK 27-Jun-18 10:00 27-Jun-18 12:00 2 Hours
Daily		 760L (163s Amoco Empress - 760L41),163s 760N (163s Amoco Empress),760L (163s-A767s)- GOI Trip Test 163s760N Required for T1 Protection Replacement  
ALTALINK 28-Jun-18 08:30 28-Jun-18 14:00 5.5 Hours
Daily		 163s Partial Bus & T1/T5 - GOI,163s T1 (163s Amoco Empress),163s T5 (163s Amoco Empress) Perform Trip Tests for 163s1252, 163s1552, 163s189 Required for T1 Protection Replacement  
ALTALINK 29-Jun-18 07:00 30-Jun-18 18:00 1.46 Days
Continuous		 847L (602s Cold Creek - 406s Fickle Lake),847L (406s-602s) GOI 847L Transmission Line Outage for 492L1 Bypass Structure tie- in with 847L.  
EPCOR 03-Jul-18 07:00 03-Jul-18 17:00 10 Hours
Continuous		 1058L (657s Summerside - 803s Lambton) Maint  
ALTALINK 03-Jul-18 07:00 03-Jul-18 18:00 11 Hours
Daily		 729L (542s Ervick - 729L13A) Installing bird diverters on two spans of OHSW between Structures #138 - #140  
ENMAX, ALTALINK 03-Jul-18 08:00 03-Jul-18 16:00 8 Hours
Continuous		 24.83L (74s Janet - ENMAX 24) SF6 gas sample 24B138-24.83L, Doble 24B138-24.83L  
EPCOR 04-Jul-18 07:00 04-Jul-18 17:00 10 Hours
Continuous		 803s L2403 (803s Lambton),L2403BKR @ Lambton Maint  
ALTALINK 04-Jul-18 11:00 05-Jul-18 15:00 28 Hours
Continuous		 277s T1 (277s Hayter),748L (267s Killarney Lake - 277s Hayter) 138kV HGF SF6 gas breaker maintenance @ both ends of 748L  
EPCOR 05-Jul-18 07:00 05-Jul-18 17:00 10 Hours
Continuous		 L2405BKR @ Lambton,803s L2405 (803s Lambton) Maint  
ALTALINK, EPCOR 06-Jul-18 07:00 06-Jul-18 17:00 10 Hours
Continuous		 1059L (38s East Edmonton - 803s Lambton) Maint  
ALTALINK, EPCOR 06-Jul-18 07:00 09-Jul-18 17:00 3.42 Days
Continuous		 1044L (805s Jasper - 816s Petrolia) Steel Pole Refurbishment  
Syncrude 06-Jul-18 09:00 07-Jul-18 20:00 1.46 Days
Continuous		 RL1 (848s Ruth Lake - D05 Syncrude) install marker balls at the highway-63 crossing  
ALTALINK, EPCOR 08-Jul-18 08:00 08-Jul-18 18:00 10 Hours
Daily		 1056L (89s Ellerslie - 629s Argyll Transfer Station),89s1056 (Affecting 1056L) GOI 89s1056 36deg and 45deg Hot Spots  
Syncrude 08-Jul-18 09:00 09-Jul-18 20:00 1.46 Days
Continuous		 RL2 (848s Ruth Lake - D05 Syncrude) install marker balls at the highway-63 crossing  
EPCOR 09-Jul-18 07:00 13-Jul-18 17:00 4.42 Days
Continuous		 987s T4 (987s Clover Bar),TX4@Cloverbar Doble  
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 12-Jul-18 17:45 3.35 Days
Continuous		 925L (63s Red Deer - 74s Janet),925L (63s - 74s) GOI Maintenance Components (Str 117-404)  
ALTALINK 09-Jul-18 09:30 11-Jul-18 17:30 2.33 Days
Continuous		 510s ACF 11 GOI,510s ACF11 (510s Sunnybrook) Outage and GOI required to inspect the Filter Bank  
ALTALINK, ATCO 09-Jul-18 13:00 12-Jul-18 17:00 3.17 Days
Continuous		 1087L (324s - A2075s) Advice,1087L (324s Cassils - 2075s Newell) SCADA system upgrade (line differential protections be disabled for the duration)  
ATCO 10-Jul-18 08:00 11-Jul-18 16:00 1.33 Days
Continuous		 963s 901 (963s Coyote Lake),9L29 (946s Oakland - 963s Coyote Lake) 963S Coyote 901CT Ratio Change Project
CT Ration & Relay Settings Changes on equipment
Associated with 901CT and 50BF/901 Relay		  
ALTALINK 11-Jul-18 12:30 13-Jul-18 15:30 2.13 Days
Continuous		 510s ACF12 (510s Sunnybrook),510s ACF 12 GOI Outage and GOI required to inspect the Filter Bank  
EPCOR 13-Jul-18 07:00 13-Jul-18 17:00 10 Hours
Continuous		 Bus 2 240KV @ Cloverbar,987s C2405 (987s Clover Bar),987s C2406 (987s Clover Bar),987S Clover Bar 240 kV Bus 2,987s T2 (987s Clover Bar) Doble  
ALTALINK, EPCOR 13-Jul-18 07:00 16-Jul-18 17:00 3.42 Days
Continuous		 1045L (310p Sundance - 805s Jasper) Steel Pole Refurbishment  
EPCOR 16-Jul-18 07:00 16-Jul-18 17:00 10 Hours
Continuous		 240BA3 (814s Bellamy - 629s Argyll Transfer Station),1055L (816s Petrolia - 629s Argyll Transfer Station),BA3/1055L @ Argyl Doble  
ATCO 16-Jul-18 07:00 18-Jul-18 15:30 2.35 Days
Continuous		 2075S ACF11,2075s ACF11 (2075s Newell) Maintenance on the 901T 240KV transformer, and inspections of ACF11, SVC2 will be in service.  
ATCO 16-Jul-18 07:00 18-Jul-18 15:30 2.35 Days
Continuous		 2029s ACF14 (2029s Heathfield) ACF 14 Shunt reactor inspection & testing.  
ALTALINK 16-Jul-18 08:00 16-Jul-18 16:00 8 Hours
Continuous		 932L (74s Janet - 162s Beddington) Repair SW144  
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 09:30 20-Jul-18 17:00 4.31 Days
Continuous		 510s ACF14 (510s Sunnybrook),510s ACF 14 GOI Outage and GOI required to inspect the Filter Bank  
ALTALINK 16-Jul-18 11:00 26-Jul-18 16:00 10.21 Days
Continuous		 1112L (289s Saunders Lake - 89s Ellerslie),89s 1452 (89s Ellerslie),89s 1552 (89s Ellerslie) 89s1452 Breaker Replacement, 89s81 PT Replacement  
ALTALINK 16-Jul-18 13:00 19-Jul-18 17:00 3.17 Days
Continuous		 1088L (324s - A2075s) Advice,1088L (324s Cassils - 2075s Newell) SCADA system upgrade (line differential protections be disabled for the duration)  
EPCOR, ALTALINK 17-Jul-18 07:00 17-Jul-18 17:00 10 Hours
Continuous		 920L @ Castledowns / North Calder,920L (37s North Calder - 557s Castle Downs) Doble  
ALTALINK 17-Jul-18 07:00 26-Jul-18 18:00 9.46 Days
Continuous		 708L (71s Lamoureux - 708L88X) New airbrake to be installed next to old.  
ALTALINK 17-Jul-18 08:00 17-Jul-18 16:00 8 Hours
Continuous		 788L/788AL/602L/789L (157s - 140s - A898,788L (898s Heart Lake - 788L107A - 602L1),788L (157s Lac La Biche - 898s Heart Lake),789L (818s Winefred - 898s Heart Lake) Adjusting 788L107A and 788L106B  
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 18-Jul-18 07:00 18-Jul-18 18:00 11 Hours
Daily		 788L (788L Tap - 898s Heart Lake),788L(788L107A - A898s) and 602L/789L - G Adjusting 602LA1 and OHSW @ Structure 788L277  
ALTALINK 18-Jul-18 09:00 18-Jul-18 15:00 6 Hours
Daily		 103s T1 (103s Goose Lake),103s 240kV Bus 1 GOI Install voltage test leads on 240kV bus  
ATCO 19-Jul-18 07:00 20-Jul-18 15:30 1.35 Days
Continuous		 2075S ACF12,2075s ACF12 (2075s Newell) Filter Bank Maintenance and Inspection, ACF12 will be out of service during outage, One A type filter needs to be available at all times so we will lose redundancy when ACF12 is out of service. ACF 22 will still be available. Power Cap will be at 1000 MW @ 500 kV when only one A type filter is available.  
ATCO 19-Jul-18 07:00 20-Jul-18 15:30 1.35 Days
Continuous		 2029s ACF13 (2029s Heathfield) Filter Bank Maintenance and Inspection, redundant filter banks in service, no system impact  
EPCOR 20-Jul-18 07:00 23-Jul-18 17:00 3.42 Days
Continuous		 1098L (805s Jasper - Poundmaker) Steel Pole Refurbishment  
EPCOR 22-Jul-18 07:00 22-Jul-18 17:00 10 Hours
Continuous		 Bus1 VT @ Rossdale,814s T1 (814s Bellamy),72RS5 (Rossdale - Strathcona),72RV6 (Rossdale - 511s Victoria) Doble  
ATCO 23-Jul-18 07:00 24-Jul-18 15:30 1.35 Days
Continuous		 2029s ACF11 (2029s Heathfield) Filter Bank Maintenance and Inspection, redundant filter banks in service, no system impact  
ATCO 23-Jul-18 07:00 24-Jul-18 15:30 1.35 Days
Continuous		 2075s ACF13 (2075s Newell) Filter bank inspection/maintenance, redundant filters will remain in service  
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 27-Jul-18 17:45 4.35 Days
Continuous		 754L (437s - 754L75) GOI,754L (437s Baymag - 754L72) Structure Replacements (Str 82-90)  
ALTALINK 23-Jul-18 10:00 26-Jul-18 16:00 3.25 Days
Continuous		 87s T1 (87s Gaetz),914L (87s Gaetz - 63s Red Deer),87s 552 (87s Gaetz),87s 152 (87s Gaetz),87s 952 (87s Gaetz),87s 1652 (87s Gaetz),87s 240kV & 138kV West Buses - GOI Replace A87/240BW Protection and perform test trips to 87s2352, 87s1652, 87s952, 87s552, & 87s152  
ALTALINK 23-Jul-18 12:30 25-Jul-18 14:30 2.08 Days
Continuous		 338s 252 (338s Cherhill),338s252 GOI 338s252 maintenance  
ALTALINK 23-Jul-18 13:00 26-Jul-18 16:00 3.13 Days
Continuous		 974L (39s Bickerdike - 310p Sundance) Migrate and commission all L1 - 974L at 310P Sundance associated line protections, breakers, breaker fail and Tele-protection alarms, status, controls, metering and remote access to new RTU and LAN. Migrate and commission CVT-L1 alarms.  
ALTALINK 23-Jul-18 13:00 26-Jul-18 17:00 3.17 Days
Continuous		 1051L (28s West Brooks - 324s Cassils) SCADA system upgrade  
ALTALINK 23-Jul-18 13:30 26-Jul-18 16:00 3.1 Days
Continuous		 562s T2 (TX18774) - GOI,562s T2 (562s Cypress) Maintain, doble, SFRA and investigate alarm on T2.  
ATCO 25-Jul-18 07:00 26-Jul-18 15:30 1.35 Days
Continuous		 2029s ACF12 (2029s Heathfield) Filter Bank Maintenance and Inspection, redundant filter banks in service, no system impact  
ATCO 25-Jul-18 07:00 26-Jul-18 15:30 1.35 Days
Continuous		 2075s ACF14 (2075s Newell) Filter bank inspection/maintenance, No redundancy for type C filter. ACF24 will still be available  
ATCO 30-Jul-18 07:00 31-Jul-18 15:30 1.35 Days
Continuous		 2029s ACF22 (2029s Heathfield) Filter Bank Maintenance and Inspection, redundant filter banks in service, no system impact  
ATCO 30-Jul-18 07:00 01-Aug-18 15:30 2.35 Days
Continuous		 2075s ACF21 (2075s Newell) ACF21/902T inspections/maintenance, SVC1 will remain in service.  
SUNCOR 30-Jul-18 09:00 17-Aug-18 18:00 18.38 Days
Continuous		 29PL9-14 (29EDD-56 - 29EDD-34),29EDD-34 Edd34Sub 5 year maintenance on breakers, bus CT and switches  
ALTALINK 30-Jul-18 09:15 03-Aug-18 17:45 4.35 Days
Continuous		 754L (437s - 754L75) GOI,754L (437s Baymag - 754L72) Structure Replacements (Str 82-90)  
ALTALINK, EPCOR 30-Jul-18 09:30 02-Aug-18 16:30 3.29 Days
Continuous		 921L (71s Lamoureux - 987s Clover Bar),71s 1352 (71s Lamoureux),71s 1252 (71s Lamoureux) Replace PT's  
ALTALINK 30-Jul-18 10:00 02-Aug-18 16:00 3.25 Days
Continuous		 87s T2 (87s Gaetz),87s 1252 (87s Gaetz),87s 1052 (87s Gaetz),87s 852 (87s Gaetz),87s 252 (87s Gaetz),87s 2352 (87s Gaetz),914L (86s Bigstone - 87s Gaetz),87s 240kV & 138kV East Buses - GOI Replace A87/240BE protection and perform test trips to 87s2352, 87s1252, 87s1052, 87s852, & 87s252  
ALTALINK 30-Jul-18 12:15 30-Jul-18 17:00 4.75 Hours
Daily		 708L (233s Beamer - 708L88N),708L89 (708L) - Advice 708L Bypass Cutover/ Create Open Points 'C' & 'D'  
ALTALINK 30-Jul-18 17:00 07-Aug-18 13:00 7.83 Days
Continuous		 708L (233s Beamer - 708L88N),708L (233s - Open 'C' - Open 'D') - GOI Salvaging old switches 708L88X & 708L88N  
ATCO 01-Aug-18 07:00 02-Aug-18 13:30 30.5 Hours
Continuous		 2029s ACF23 (2029s Heathfield) Filter Bank Maintenance and Inspection, redundant filter banks in service, no system impact  
ATCO 02-Aug-18 07:00 03-Aug-18 15:30 1.35 Days
Continuous		 2075s ACF12 (2075s Newell) Filter Bank Maintenance and Inspection, One A type filter needs to be available at all times so we will lose redundancy when ACF22 is out of service. ACF 12 will still be available. Power Cap will be at 1000 MW @ 500 kV when only one A type filter is available.  
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
ATCO 06-Aug-18 07:00 07-Aug-18 15:30 1.35 Days
Continuous		 2029s ACF21 (2029s Heathfield) Filter Bank Maintenance and Inspection, redundant filter banks in service, no system impact  
ENMAX 06-Aug-18 08:00 17-Aug-18 16:00 11.33 Days
Continuous		 162s 138_RB94 (162s Beddington),162s 138-RB86 (162s Beddington),162s 240-RB131 (162s Beddington),162s 240-RB134 (162s Beddington),162s 138-RB80 (162s Beddington),162.1TR (ENMAX 162s Beddington) HV SW MD 162MD240-162.1TR. Oil sampling H,X bushings. Doble 162PT138-T1. Transformer maintenance, LTC inspection. SF6 gas sample RB131, RB134. Dashpot checks RB131, RB134, RB80, RB84.Gas relay testing. Upgrade T60 setting  
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 - BC maintenance does not affect AB ATC AB-BC
ATCO 07-Aug-18 07:00 08-Aug-18 15:30 1.35 Days
Continuous		 2075s ACF23 (2075s Newell) Filter bank inspection/maintenance, redundant filter ACF13 (B filter) will remain available  
ALTALINK, TRANSALTAEM 07-Aug-18 07:00 09-Aug-18 18:00 2.46 Days
Continuous		 724L (724L0B - I_WAP - 500s) - GOI,724AL (WAP-7L1 - 724AL),724L (500s Flatbush - 724L1) Component replacement  
ALTALINK 07-Aug-18 13:00 07-Aug-18 17:30 4.5 Hours
Daily		 708L (233s Beamer - 708L88N),708L89 (708L) - Advice Closing Open Points 'C' & 'D' and cutting the temporary bypass free  
ALTALINK 08-Aug-18 07:15 16-Aug-18 17:45 8.44 Days
Continuous		 754L (245s Seebe - 754L65A),754L (245s - 754L65A) GOI Structure Replacements (Str 34-64)  
ALTALINK 08-Aug-18 09:00 08-Aug-18 15:00 6 Hours
Daily		 103s T1 (103s Goose Lake),103s 240kV Bus 1 GOI Remove voltage test leads from 240kV bus  
ATCO 09-Aug-18 07:00 10-Aug-18 15:30 1.35 Days
Continuous		 2075s ACF24 (2075s Newell) Filter bank inspection/maintenance, No redundancy of Type C filter during outage. ACF14 will still be available.  
ALTALINK 13-Aug-18 07:30 14-Aug-18 17:30 1.42 Days
Continuous		 804L (86s Bigstone - 40s Wetaskiwin),805L (964s Pigeon Lake - 86s Bigstone),86s T1 (86s Bigstone) 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 09:30 17-Aug-18 17:30 4.33 Days
Continuous		 510s ACF 21 GOI,510s ACF21 (510s Sunnybrook) Outage and GOI required to inspect the Filter Bank. Changing capacitors and inspection.  
ALTALINK 13-Aug-18 10:30 17-Aug-18 17:30 4.29 Days
Continuous		 410s T2 TX18133 - GOI,410s T2 (410s Josephburg) Transformer Bushing Replacement & Maintenance Work  
ALTALINK 13-Aug-18 11:00 23-Aug-18 16:00 10.21 Days
Continuous		 1057L (89s Ellerslie - 657s Summerside) 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		 29EDD-34 Edd34Sub,29PL9-15 (29EDD-56 - 29EDD-34) 5 year maintenance on breakers, bus CT and switches  
ALTALINK 20-Aug-18 09:15 24-Aug-18 17:45 4.35 Days
Continuous		 754L (245s - 754L65A) GOI,754L (245s Seebe - 754L65A) Structure Replacements (Str 34-64)  
ALTALINK 20-Aug-18 09:30 22-Aug-18 12:30 2.13 Days
Continuous		 510s ACF 22 GOI,510s ACF22 (510s Sunnybrook) Outage and GOI required to inspect the Filter Bank. Inspection  
ALTALINK 20-Aug-18 10:00 20-Aug-18 15:45 5.75 Hours
Daily		 74s T1 & 240kV Bus 1 - GOI,74s T1 (74s Janet) Cut Open Point 'A' on 240kV Bus between 74s48 and 74s20N. Bus Required in order to replace 74s252 Ct due to proximity  
ALTALINK 20-Aug-18 10:00 24-Aug-18 15:00 4.21 Days
Continuous		 42s T1 TX18508 - GOI,42s T1 (42s Sarcee) Repairs to Control Building Roof, Required due to proximity  
ALTALINK 20-Aug-18 11:00 23-Aug-18 18:00 3.29 Days
Continuous		 39s T2 (39s Bickerdike),39s T2 TX5778 - GOI Replace T2 Tertiary Bushing  
ALTALINK 20-Aug-18 15:45 30-Aug-18 10:30 9.78 Days
Continuous		 74s T1 (74s Janet),74s T1 & 240kV Bus 1 - GOI (1) Bus outage required in order to replace 74s252 CT due to proximity.  
ALTALINK, EPCOR 22-Aug-18 07:00 22-Aug-18 17:00 10 Hours
Continuous		 1238L (510s Sunnybrook - 330p Genesee),Sunnybrook BKR Maint  
ALTALINK 22-Aug-18 12:30 23-Aug-18 17:30 29 Hours
Continuous		 510s ACF 13 GOI,510s ACF13 (510s Sunnybrook) Outage and GOI required to inspect the Filter Bank. Inspection  
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 28-Aug-18 07:00 03-Sep-18 17:00 6.42 Days
Continuous		 800S 702,7L73 (829s Boucher Creek - 800s Friedenstal) Upgrade 7L73 protection and install TPR and new RAS.  
ALTALINK 30-Aug-18 10:30 30-Aug-18 14:15 3.75 Hours
Daily		 74s T1 (74s Janet),74s T1 & 240kV Bus 1 - GOI (2) Close Open Point 'A' on 240kV Bus between 74s48 and 74s20N. Bus.  
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 07-Sep-18 17:00 4.33 Days
Continuous		 1L274 (EFT 1D22 - 1D3L274),1L274 (Elkford - EFT1D22) Annual Plan Request AB-BC
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
EPCOR 04-Sep-18 07:00 26-Oct-18 17:00 52.42 Days
Continuous		 TX1 @ Petrolia,816s T1 (816s Petrolia) Tap Changer & Bushing replacements  
ATCO 04-Sep-18 07:00 25-Nov-18 17:00 82.46 Days
Continuous		 972S 905B,972s 905B (972s Tinchebray) 972s 905B  
ALTALINK 04-Sep-18 08:00 14-Sep-18 17:00 10.38 Days
Continuous		 1325L (510s Sunnybrook - 511s Crossings),511s DC yard,Valve Hall and T11 GOI,511s Crossing Annual Inspection and Maintenance, Link will be out of service  
ALTALINK 04-Sep-18 08:00 14-Sep-18 17:00 10.38 Days
Continuous		 510S Sunnybrook,Valve Hall and T11 GOI,510s DC yard Annual Inspection and Maintenance, Link will be out of service  
ALTALINK, ATCO 05-Sep-18 11:00 05-Sep-18 15:00 4 Hours
Daily		 953L/9L953 (574s - A755s) De-energized (,953L (574s Nilrem - 755s Cordel),9L953 (574s Nilrem - 755s Cordel) Required for 9465R (lougheed) Tower Replacement (dynamic study)  
SHELL, ATCO 10-Sep-18 07:00 10-Sep-18 17:00 10 Hours
Continuous		 847s 901T (847s Muskeg River),919S 906 Transformer protection upgrade during planned generator turnaround.  
ALTALINK 10-Sep-18 08:00 27-Sep-18 17:00 17.38 Days
Continuous		 62s T5 (62s Brazeau) 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  
BCH 11-Sep-18 09:00 11-Sep-18 17:00 8 Hours
Continuous		 2L113 (B1s Natal - B2s Cranbrook),1L274 (B1s BCH Natal - 1D1L274) Placeholder for Annual Plan Request F19 AB-BC
EPCOR 17-Sep-18 07:00 21-Sep-18 17:00 4.42 Days
Continuous		 TX1 @ Jasper,72JM18 (805s Jasper - Meadowlark),72JW19 (805s Jasper - Woodcroft),805s T1 (805s Jasper) Doble  
ALTALINK, EPCOR 17-Sep-18 07:00 29-Sep-18 18:00 12.46 Days
Continuous		 510s 2852 (510s Sunnybrook),510s2852 and 510s3052 (1238L) - GOI,1238L (510s Sunnybrook - 330p Genesee) Installing new 510s2952, CT's, 510s46, 510s48 and protection/breaker fail mods  
MONTANA 17-Sep-18 09:00 27-Sep-18 18:00 10.38 Days
Continuous		 MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
ALTALINK 17-Sep-18 09:00 27-Sep-18 18:00 10.38 Days
Continuous		 1201L (520s Bennett - BCH Cranbrook) Maintenance Components AB-BC
ATCO 18-Sep-18 07:00 25-Sep-18 17:00 7.42 Days
Continuous		 7L75 (A793s West Peace River - 800s Friedenstal) Upgrade 7L75 protection and install new TPR and RAS  
ALTALINK, Lethbridge 18-Sep-18 08:00 04-Oct-18 14:00 16.25 Days
Continuous		 813L (241s Lethbridge Uplands - 146s Lethbridge MacDonald),667L (370s North Lethbridge - 146s Lethbridge MacDonald) Replace 138kv motorized airbreak  
ATCO 24-Sep-18 08:00 28-Sep-18 15:00 4.29 Days
Continuous		 9L46 (932s Pemukan - 959s Lanfine) GOI to complete the OPGW repair. on 9L46

STUDY DUE AUGUST 14 2018		  
ALTALINK 24-Sep-18 08:00 11-Oct-18 17:00 17.38 Days
Continuous		 163s C2 (163s Amoco Empress),163s Partial 138kV Bus - Advice,163s C1 (163s Amoco Empress),163s 869W (163s Amoco Empress),760L (163s Amoco Empress - 760L41),869L (204s Sandy Point - 163s Amoco Empress) Replace 163s4 PT, 163s64 Breaker, & 163s65 Switch & 163s869W Breaker Fail Replacement.  
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  
ALTALINK 24-Sep-18 12:00 04-Oct-18 18:00 10.25 Days
Continuous		 71s T1 (71s Lamoureux),71s T1(Tx18357) GOI Replace the 71s T1 bushings (240kV, 138kV and XO)  
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,62s T7 (62s Brazeau),62s T4 (62s Brazeau),62s T5 (62s Brazeau),62s C1 (62s Brazeau),202L (61s Lodgepole - 62s Brazeau),801L (62s Brazeau - 294s Brazeau Outlet Works),62s 207 (62s Brazeau),62s 31 (62s Brazeau) 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 08-Oct-18 09:00 12-Oct-18 17:00 4.33 Days
Continuous		 1L275 (799s Coleman - Natal) Annual Plan Request F19 - Kirk Carston or Trevor Wareham AB-BC
BCH 15-Oct-18 08:00 15-Oct-18 16:00 8 Hours
Continuous		 2L294 (Nelway - A.A. Lambert) Fortis Annual Plan 2018
(Outage)AAL CB3-1 Switch Replacement, to CREATE BUS CUT to RESTORE 2L294 during the replacement of CB3-1		 AB-BC
ALTALINK 15-Oct-18 08:00 19-Oct-18 17:00 4.38 Days
Continuous		 719L (575s Sundre - 378s Shell Caroline),378s 652 (378s Shell Caroline),378s 552 (378s Shell Caroline),575s 719N (575s Sundre) Upgrade 378s Shell Caroline Line Prot (A21/L4 & B21/L4.  
BCH 15-Oct-18 09:00 19-Oct-18 17:00 4.33 Days
Continuous		 1L274 (B1s BCH Natal - 1D1L274) Annual Plan Request F19 AB-BC
ALTALINK 16-Oct-18 07:00 17-Oct-18 18:00 1.46 Days
Continuous		 72s T1 (72s Leismer),72s T1 & 25kV Bus - GOI Transformer Bushing Replacement  
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
BCH 25-Oct-18 09:00 25-Oct-18 17:00 8 Hours
Continuous		 2L294 (Nelway - A.A. Lambert) Fortis Annual Plan 2018 and AAL CB3-1 Switch Replacement AB-BC
ATCO 30-Oct-18 07:00 30-Oct-18 17:00 10 Hours
Continuous		 7L69 (815s Goodfare - 731s Elmworth),815s 704 (815s Goodfare) Install and test transfer trip from Altalink ,Protection upgrade for Advantage Oil and Gas addition  
ALTALINK, Lethbridge 05-Nov-18 13:00 06-Dec-18 14:00 31.04 Days
Continuous		 824L (593s Lethbridge Lakeview - 618s Riverbend) Install self-supporting structures  
BCH 06-Nov-18 09:00 16-Nov-18 17:00 10.33 Days
Continuous		 1L274 (B1s BCH Natal - 1D1L274) Annual Plan Request F19 AB-BC
ALTALINK 26-Nov-18 07:00 04-Dec-18 18:00 8.46 Days
Continuous		 510s 2852 (510s Sunnybrook),510s 2952 (510s Sunnybrook) 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 (888s Dover - 848s Ruth Lake) 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 (885s McMillan - 888s Dover) Cut in 951S Thickwood Hills substation.  
ENMAX, ALTALINK 04-Feb-19 08:00 15-Feb-19 16:00 11.33 Days
Continuous		 24.83L (74s Janet - ENMAX 24) Transmission Line Relocate  
ATCO 02-May-19 07:00 02-May-19 17:00 10 Hours
Continuous		 6L57 (735s Swan River - 727s Kinuso) 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
ATCO 02-Jul-19 07:00 05-Jul-19 17:30 3.44 Days
Continuous		 9L46 (932s Pemukan - 959s Lanfine) Attach new Sharp Hills wind farm in/out connection.  

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: 2018-05-30   4:06:43 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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