Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2019-08-31

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
Syncrude 04-Oct-18 09:00 15-Jan-20 20:00 468.5 Days
Continuous		 Mildred T3 (Syncrude Mildred Lake) damaged transformer repairs  
ALTALINK 07-Aug-19 09:00 17-Oct-19 17:00 71.33 Days
Continuous		 205s Castle Rock Ridge 240 kV Bus 2,205s 452 (205s Castle Rock) construction for new wind farm  
ALTALINK 07-Aug-19 16:00 16-Sep-19 16:00 40 Days
Daily		 50L (44s Bearspaw Plant - ENMAX 21) urgent outage to address clearance issues  
SUNCOR 19-Aug-19 08:00 04-Oct-19 18:00 46.42 Days
Continuous		 29EDD-56 5 year maintenance  
ENMAX, ALTALINK 19-Aug-19 10:00 15-Sep-19 16:00 27.25 Days
Continuous		 932L (74s Janet - 162s Beddington),74s 552 (74s Janet),74s 252 (74s Janet),162s 240-RB135 (162s Beddington),162s 240-136 (162s Beddington) line protection upgrade  
BCH 20-Aug-19 09:00 06-Sep-19 17:00 17.33 Days
Continuous		 5L72 (Mica Creek - Nicola) arcing horn and spacer damper AB-BC
ATCO 26-Aug-19 07:00 02-Sep-19 19:00 7.5 Days
Continuous		 951s SVC (951s Thickwood) troubleshooting for low differential pressure alarm  
ALTALINK 26-Aug-19 13:45 04-Sep-19 15:15 9.06 Days
Continuous		 275s T1 (275s Jenner) tap changer upgrades, maintain, fix leaks, doble, IDD, hydran and bird cover install  
ALTALINK 31-Aug-19 07:00 01-Sep-19 18:00 1.46 Days
Continuous		 170L (632s - 799s) - GOI,170L (632s Russell - 799s Coleman) Urgent fire mitigation; Insulator changes, bird perch diverters and damaged wire repair on Structures #19, 20, 21, 22 & 30  
ALTALINK 02-Sep-19 07:00 12-Sep-19 16:30 10.4 Days
Continuous		 205s13 Advice for customer,205s13 (205s Castle Rock Ridge) Maintenance and construction by customer  
EPCOR 03-Sep-19 07:00 01-Nov-19 17:00 59.42 Days
Continuous		 TX2 @ Petrolia,816s T2 (816s Petrolia) Tap changer & Oil reclamation  
ALBIAN 03-Sep-19 08:00 10-Sep-19 17:00 7.38 Days
Continuous		 920s 902T (920s Jackpine) OLTC & Transformer Preventive Maintenance  
ALTALINK, ENMAX 03-Sep-19 08:15 12-Sep-19 15:45 9.31 Days
Continuous		 932L (74s - 162s) GOI,932L (74s Janet - 162s Beddington) SCADA equipment upgrade, migrate new alarms, controls, analogs and remote access to new SCADA system.  
ALTALINK 03-Sep-19 08:30 11-Sep-19 09:30 8.04 Days
Continuous		 89s852 GOI,89s 852 (89s Ellerslie) Replace existing breaker fail protection relay module and breaker control module with C60 module.  
ALTALINK 03-Sep-19 12:15 14-Sep-19 17:45 11.23 Days
Continuous		 68s T2(TX18405) GOI,68s T2 (68s Willesden Green) CS Mitigation  
ALTALINK 04-Sep-19 07:00 05-Sep-19 18:00 1.46 Days
Continuous		 887L (48s Pocaterra - BCH Britt Creek),887L (48s - BCK_1D22) - GOI Urgent fire mitigation; Insulator changes, bird perch diverters and damaged wire repair on Structures #19, 20, 21, 22 & 30  
ENMAX, ALTALINK 04-Sep-19 08:00 04-Sep-19 13:00 5 Hours
Continuous		 833L. 12.2TR. 12PT138-Z31,833L (ENMAX 2 - ENMAX 12) Substation Washing. Check reversing switch 12.2TR  
ALTALINK 04-Sep-19 08:30 04-Sep-19 16:30 8 Hours
Daily		 310p1852 GOI,310p 1852 (310p Sundance) Close Dashpots Leaking  
ENMAX, ALTALINK 04-Sep-19 13:00 04-Sep-19 18:00 5 Hours
Continuous		 832L (ENMAX 10 - ENMAX 12),832L. 12.1TR. 12PT138-Z31 Substation Washing  
ALTALINK 04-Sep-19 13:45 04-Sep-19 17:15 3.5 Hours
Daily		 275s T1 (Tx18457) & 25kV Bus 4 - GOI,275s T1 (275s Jenner) Clean hot 25kV switch 275s62  
ALTALINK, ATCO 04-Sep-19 22:00 05-Sep-19 06:00 8 Hours
Continuous		 395s Station,174L/701L/7L77 GOI,7L77 (395s North Holden - 709s Vegreville),174L (197s Bardo - 395s North Holden),701L (395s North Holden - 223s Strome) 138kV bus insulators to be replaced, T1(TX18243) doble/maintenance  
EPCOR 06-Sep-19 09:00 06-Sep-19 10:00 60 Mins
Continuous		 987s T1 (987s Clover Bar) Restore CCP7214 New Breaker  
BCH 07-Sep-19 09:00 12-Oct-19 17:00 35.33 Days
Continuous		 5L71 (Mica Creek - Nicola) MCA Switchgear Roof Replacement project. BC Maintenance does not affect the Alberta ATC AB-BC
ATCO 09-Sep-19 08:30 13-Sep-19 14:00 4.23 Days
Continuous		 834s 901T (834s Wesley Creek) 834S 901T OLTC Refurbishment

902T will be carrying the full substation load		  
ALTALINK, MONTANA 09-Sep-19 09:00 19-Sep-19 18:00 10.38 Days
Continuous		 MATL (120s Picture Butte - Montana),1201L (520s Bennett - BCH Cranbrook),1201L/5L94 (520s - B2s) GOI Component Replacements- Structure Range 350-455 AB-BC
ALTALINK 09-Sep-19 10:15 18-Sep-19 17:45 9.31 Days
Continuous		 64s T2 (Tx18748) & 240kV Bus (901AL) GOI,64s T2 (64s East Crossfield),901AL (64s East Crossfield - 901L tap) Replace 240/138kV Bushings, fix leaks, doble, maintain  
ALTALINK 09-Sep-19 12:00 12-Sep-19 16:00 3.17 Days
Continuous		 520s T1(Tx18414) GOI,520s T1 (520s Bennett) Change 240/500kv bus work(close Open Points) in order to energize Tx18414. Tx18415 to become the spare.In conjunction with 1201L/5L94 outage Ref# 26411.  
EPCOR 10-Sep-19 02:00 15-Sep-19 14:00 5.5 Days
Continuous		 72CK12 (987s Clover Bar - Kennedale),987s CCP7213 (987s Clover Bar),987s CC13 (987s Clover Bar),987s CK725 (987s Clover Bar),987s CGB2 (987s Clover Bar) Disconnect Aux Contacts and Doble  
ALTALINK 10-Sep-19 07:00 10-Sep-19 13:00 6 Hours
Daily		 973L (39s-310p) - GOI,973L (39s Bickerdike - 310p Sundance) Urgent Fire Mitigation - Scope of work includes replace OHSW assembly on Structure 250  
ALTALINK, ATCO 10-Sep-19 07:30 10-Sep-19 12:00 4.5 Hours
Daily		 7L129 (526s Buffalo Creek - 710s Vermilion),526s152 (7L129) GOI tank heater repair  
ALTALINK 10-Sep-19 08:45 10-Sep-19 10:15 90 Mins
Daily		 89s452 Advice,89s 452 (89s Ellerslie) Replace existing breaker fail protection relay module and breaker control module with C60 module. Function trip test to89s452 breaker from new breaker failure module.  
ALTALINK 10-Sep-19 10:16 10-Sep-19 11:45 89 Mins
Daily		 89s1252 Advice,89s 1252 (89s Ellerslie) Replace existing breaker fail protection relay module and breaker control module with C60 module. Function trip test to89s1252 breaker from new breaker failure module.  
ALTALINK, ENMAX 10-Sep-19 11:30 10-Sep-19 18:30 7 Hours
Daily		 37.82L (74s Janet - ENMAX 37),37.82L Enmax - Breaker Open Advice Fall Substation Washing  
ALTALINK 10-Sep-19 11:46 10-Sep-19 13:15 89 Mins
Daily		 89s1652 Advice,89s 1652 (89s Ellerslie) Replace existing breaker fail protection relay module and breaker control module with C60 module. Function trip test to89s1652 breaker from new breaker failure module.  
ENMAX, ALTALINK 10-Sep-19 12:00 10-Sep-19 18:00 6 Hours
Continuous		 37.82L (74s Janet - ENMAX 37),37.82L. 37.2TR. 37PT138-Z31 Substation Washing. Check reversing switch.  
ALTALINK, ATCO 10-Sep-19 12:01 10-Sep-19 17:30 5.48 Hours
Daily		 526s252 (7L50) GOI,7L50 (757s Battle River - 526s Buffalo Creek) tank heater repair  
ALTALINK 10-Sep-19 13:16 10-Sep-19 14:45 89 Mins
Daily		 89s 1952 (89s Ellerslie),89s1952 Advice Replace existing breaker fail protection relay module and breaker control module with C60 module. Function trip test to 89s1952 breaker from new breaker failure module.  
ALTALINK 10-Sep-19 14:46 10-Sep-19 16:15 89 Mins
Daily		 89s2252 Advice,89s 2252 (89s Ellerslie) Replace existing breaker fail protection relay module and breaker control module with C60 module. Function trip test to89s2252 breaker from new breaker failure module.  
ALTALINK 11-Sep-19 09:30 11-Sep-19 11:30 2 Hours
Daily		 89s 752 (89s Ellerslie),89s752 Advice Replace existing breaker fail protection relay module and breaker control module with C60 module. Function trip test to89s752 breaker from new breaker failure module.  
ALTALINK, ENMAX 12-Sep-19 08:00 12-Sep-19 12:00 4 Hours
Daily		 36.81L (44s Bearspaw - ENMAX 36),36.81L Enmax - Breaker Open Advice Fall Substation Washing  
ENMAX, ALTALINK 12-Sep-19 08:00 12-Sep-19 12:00 4 Hours
Continuous		 7.84L (ENMAX 36 - ENMAX 7),7.84L. 36.81L. 36.1TR. 36.3TR. 36PT138-Z31. 7PT138-7.84,36.81L (44s Bearspaw - ENMAX 36) Fall Substation Washing. 36MD138-36.1TR Whip not set - adjust/repair next outage. Check reversing switch 36.1TR, 36.3TR  
ALTALINK 12-Sep-19 10:30 12-Sep-19 18:00 7.5 Hours
Daily		 283s 138kV Partial Bus(affecting 836L,6,836L (61s Lodgepole - 283s Violet Grove) To energize the Cap Bank new CT15  
ALTALINK, EPCOR 13-Sep-19 07:00 13-Sep-19 17:00 10 Hours
Daily		 909L (89s Ellerslie - 665s Dome),909L (89s-E665s) Epcor - R/B Epcor Insulator Washing  
ALTALINK, ATCO 13-Sep-19 07:00 20-Sep-19 18:00 7.46 Days
Continuous		 409s 138 Bus 2,T3 GOI,T1,409s Shell Scotford 138 kV Bus 2,409s T3 (409s Shell Scotford),ALC02L (409s Shell Scotford - 879s Scotford Upgrader),857L (409s Shell Scotford - 410s Josephburg),409s T1 (409s Shell Scotford) Includes 857L and ALC02L in isolation. T1 Bushing replacement Insulator replacement (ALC02L strain), 409s857W breaker maintenance, Wildlife cover on 25 kV Busses, 857L B protection upgrade, NGR maintenance – Shell  
ALTALINK 16-Sep-19 06:30 23-Sep-19 16:30 7.42 Days
Continuous		 205s13 Advice for customer,205s T1 (205s Castle Rock Ridge) Maintenance and construction by customer  
ATCO 16-Sep-19 08:00 19-Sep-19 16:00 3.33 Days
Continuous		 850S 702T,850s 702T (850s Rainbow Cogen) bus Maintenance  
ALTALINK, Lethbridge 16-Sep-19 08:00 20-Sep-19 17:00 4.38 Days
Continuous		 824L (593s Lethbridge Lakeview - 618s Riverbend) replace 593S4 motorized A/B  
SUNCOR 16-Sep-19 08:00 22-Sep-19 18:00 6.42 Days
Continuous		 29EDD-1 29EDD1s452 (29EDD-1 Millennium) replace Phase C pole on breaker 29EDD1S452  
ATCO, ALTALINK 16-Sep-19 08:00 23-Sep-19 17:00 7.38 Days
Continuous		 12L41,12L41 (510s Sunnybrook - 939s Livock) Climbing Patrol  
ALTALINK 16-Sep-19 09:00 20-Sep-19 17:00 4.33 Days
Continuous		 535s97N (330L2) Advice for ATCO/Nova Customer work  
ALTALINK, EPCOR 16-Sep-19 09:30 16-Sep-19 17:45 8.25 Hours
Continuous		 909L (89s-E665s) Epcor - Advice,909L (89s Ellerslie - 665s Dome) Epcor Construction activity around line (driving piles)  
ALTALINK 16-Sep-19 10:00 19-Sep-19 16:00 3.25 Days
Continuous		 74s T1 GOI,74s Janet 240kV Bus 1,74s T1 (74s Janet) SCADA equipment upgrade  
ALTALINK 16-Sep-19 12:00 16-Sep-19 18:00 6 Hours
Daily		 38s 138kV BUS 1 - GOI,38s East Edmonton 138 kV Bus 1 Various Switch & Hot Spot Repairs  
ENMAX, ALTALINK 16-Sep-19 12:00 16-Sep-19 18:00 6 Hours
Continuous		 23.80L (74s Janet - ENMAX 23),23.80L. 23.4TR Fall Substation Washing  
ALTALINK 16-Sep-19 12:30 17-Sep-19 17:00 28.5 Hours
Continuous		 244s 152 (244s Bowmanton),244s152 GOI Repair gas leak  
ATCO 16-Sep-19 13:00 20-Sep-19 13:00 4 Days
Continuous		 7L133,7L133 (786s High Level - 828s Sulphur Point) 7L133 Pole and Cross-Arm replacement  
ATCO 16-Sep-19 13:00 23-Sep-19 12:00 6.96 Days
Continuous		 813s 901T (813s Little Smoky),813s 501R (813s Little Smoky),813S 501R,813S 901T Tap Changer refurbishment, transformer out of service  
ENMAX, ALTALINK 17-Sep-19 08:00 17-Sep-19 12:00 4 Hours
Continuous		 28.80L. 28.2TR. 28PT138-Z31,28.80L (42s Sarcee - ENMAX 28) Fall Substation Washing  
ALTALINK 17-Sep-19 08:00 17-Sep-19 16:00 8 Hours
Daily		 320p1352 (1045AL) GOI,1045L (310p Sundance - 1045AL Tap),320p 1352 (320p Keephills) Modifying sync-check settings on relay  
ALTALINK, EPCOR 17-Sep-19 08:00 17-Sep-19 18:00 10 Hours
Daily		 89s452,89s352 and 1057L(89s - E657s) GO,1057L (89s Ellerslie - 657s Summerside) Replace 1057L Strain Insulators at 89s Ellerslie  
ALTALINK 17-Sep-19 08:00 26-Sep-19 17:30 9.4 Days
Continuous		 19s T10 (19s Wabamun),19s 240/138kV T10,138kV bus # 2 and 138 Salvage 138kv structure and switches 19s75 and s74. Replace 138kv insulators, relocate 19s7 and 19s240.  
ALTALINK 17-Sep-19 12:00 17-Sep-19 18:00 6 Hours
Daily		 77s 138k EBUS 825L & 484s - GOI,77s 752 (77s Sagitawah),77s 552 (77s Sagitawah),825L (484s Millar Western - 77s Sagitawah),77s T2 (77s Sagitawah),77s Sagitawah 138 kV East Bus Line work - 825L Replace Deadends at both 77s and 484s  
CENOVUS 18-Sep-19 07:00 24-Sep-19 18:00 6.46 Days
Continuous		 539s PCB_9201 (539s Sunday Creek) 5 year maintenance  
ALTALINK 18-Sep-19 08:00 18-Sep-19 16:00 8 Hours
Daily		 320p 2052 (320p Keephills),320p2052 GOI Modifying sync-check settings on relay  
ALTALINK, EPCOR 18-Sep-19 08:00 18-Sep-19 18:00 10 Hours
Daily		 89s352,89s252 and 1056L(89s - E629s) GO,1056L (89s Ellerslie - 629s Argyll Transfer Station) Replace 1056L Strain Insulators at 89s Ellerslie  
ALTALINK 18-Sep-19 08:00 19-Sep-19 15:30 31.5 Hours
Continuous		 244s552 GOI,244s 552 (244s Bowmanton) Repair gas leak  
ALTALINK 19-Sep-19 08:30 19-Sep-19 16:00 7.5 Hours
Daily		 612L (336s Fincastle - 368s Burdett),336s612 (612L) GOI Maintain 138kV SF6 gas breaker  
CNRL 20-Sep-19 07:30 10-Oct-19 18:00 20.44 Days
Continuous		 75-TR-1701 (838s Horizon Mining) Transformer OLTC and 5Yr Maintenance.  
CNRL 21-Sep-19 07:30 11-Oct-19 18:00 20.44 Days
Continuous		 75-TR-5701 (842s Horizon Upgrading),75-TR-7701 (842s Horizon Upgrading) Transformer OLTC Maintenance and 5Yr Maintenance.  
EPCOR 23-Sep-19 07:00 27-Sep-19 17:00 4.42 Days
Continuous		 803s L2401 (803s Lambton),L2401 @ Lambton Breaker Maintenance  
EPCOR 23-Sep-19 07:00 27-Sep-19 17:00 4.42 Days
Continuous		 TX4 @ Jasper,805s T4 (805s Jasper) Doble Testing  
ALTALINK, ATCO 23-Sep-19 07:00 29-Sep-19 18:00 6.46 Days
Continuous		 409s Shell Scotford 138 kV bus B1,T2 GOI,856L (409s Shell Scotford - 410s Josephburg),ALC01L (409s Shell Scotford - 408s Air Liquide Scotford),409s T2 (409s Shell Scotford),409s 138 Bus 1 Includes 856L and ALC01L in isolation. T2 Bushing replacement Insulator replacement (ALC01L strain), 409s20 breaker maintenance, Wildlife cover on 25 kV Busses, 856L B protection upgrade, ALC01L protection upgrade, NGR maintenance – Shell  
ALTALINK 23-Sep-19 07:00 11-Oct-19 17:00 18.42 Days
Continuous		 777L (48s - 245s) - GOI,777L (245s Seebe - 48s Pocaterra) Fire mitigation work replacing structures, crossarms and insulators AB-BC
ALTALINK 23-Sep-19 08:00 25-Sep-19 09:00 2.04 Days
Continuous		 931L (28s-132s) - GOI,931L (132s Ware Junction - 28s West Brooks) Install new air break control module for 28s931N (189)  
BCH 23-Sep-19 08:00 25-Sep-19 18:30 2.44 Days
Continuous		 5L51 (Ingledow - Custer) BPA celllular work. BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK 23-Sep-19 08:15 23-Sep-19 14:45 6.5 Hours
Daily		 347s 138 kV Bus GOI,720L (347s Fox Creek - 397s Benbow),199L (347s Fox Creek - 741s Fox Creek),199L (268s Whitecourt - 347s Fox Creek) Work on PT secondary circuits affecting all line protections.  
ALTALINK, TRANSALTA 23-Sep-19 09:00 27-Sep-19 16:30 4.31 Days
Continuous		 616L (59s Peigan - 103s Goose Lake),59s Peigan 138kV Bus,59s T1 (59s Peigan),59s T1(18184) & 138kV Bus(616L) - GOI Replace 138kv switches (59s7, 6, 10 and 5) and insulators.  
BCH 23-Sep-19 09:00 27-Sep-19 17:00 4.33 Days
Continuous		 5L96 (Selkirk - Vaseux Lake) Annual Plan Request. BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK 23-Sep-19 09:00 02-Oct-19 18:00 9.38 Days
Continuous		 511s DC yard,Valve Hall,511s T11 (511s Crossings),1325L (510s Sunnybrook - 511s Crossings),T11 GOI Annual Inspection and Maintenance  
ALTALINK 23-Sep-19 09:00 02-Oct-19 18:00 9.38 Days
Continuous		 T11 GOI,1325L (510s Sunnybrook - 511s Crossings),510s T11 (510s Sunnybrook),Valve Hall,510s DC yard Annual Inspection and Maintenance  
ALTALINK 23-Sep-19 10:00 26-Sep-19 16:00 3.25 Days
Continuous		 901AL (64s East Crossfield - 901L tap),901L (63s Red Deer - 901AL tap),901L (74s Janet - 901AL tap),901L (74s - 64s - 63s) Advice SCADA equipment upgrade 74s & 63s, migrate new alarms, controls, analogs and remote access to new SCADA system. Replace 74s25X.  
ALTALINK 23-Sep-19 10:00 26-Sep-19 18:00 3.33 Days
Continuous		 54s 138kV East bus,T3 (affecting 707L a,54s 40 (54s Fort Saskatchewan),707L (54s Fort Saskatchewan - 166s Dow Chemical Fort Saskatchewan),709L (54s Fort Saskatchewan - 172s Sherritt),54s T3 (54s Fort Saskatchewan),54s Fort Saskatchewan 138 kV East Bus Install and commission additional 138kV bus protection on West Bus, install slip on bushing CT’s on T3  
ALTALINK 23-Sep-19 10:45 26-Sep-19 16:45 3.25 Days
Continuous		 370s T5 (370s North Lethbridge),370s T5 (Tx18510) GOI Maintain and doble T5  
ATCO 24-Sep-19 08:00 25-Sep-19 16:00 1.33 Days
Continuous		 7L82 (788s Hotchkiss - 855s Hamburg),7L82 (855s Hamburg - 853s Ring Creek),7L82 Replace 2 fire damaged structures  
ALTALINK 24-Sep-19 08:00 25-Sep-19 17:00 1.38 Days
Continuous		 1140L(89s - 289s) GOI,1140L (289s Saunders Lake - 89s Ellerslie) Replace 89s77 Line PT’s  
CENOVUS 25-Sep-19 07:00 01-Oct-19 18:00 6.46 Days
Continuous		 539s PCB_9202 (539s Sunday Creek) 5 year maintenance  
ALTALINK 25-Sep-19 08:00 26-Sep-19 17:00 1.38 Days
Continuous		 320p552 GOI,320p 552 (320p Keephills) Modifying sync-check settings on relay  
ALTALINK, EPCOR 25-Sep-19 08:30 26-Sep-19 15:00 30.5 Hours
Continuous		 1075L (28s-132s) - GOI,1057L (89s Ellerslie - 657s Summerside) Install new air break control module for 28s1075 (389).  
EPCOR 26-Sep-19 02:00 29-Sep-19 14:00 3.5 Days
Continuous		 987s CK726 (987s Clover Bar),987s CCP7214 (987s Clover Bar),987s CH724 (987s Clover Bar),987s CC24 (987s Clover Bar),987s CGB1 (987s Clover Bar),72CH11 (Hardisty - 987s Clover Bar),72CK13 (987s Clover Bar - Kennedale) Disconnect Aux Contacts and Doble  
CNRL 26-Sep-19 07:30 27-Sep-19 18:00 1.44 Days
Continuous		 75-PLH-901 (838s Horizon Mining - 849s Joslyn) Line Maintenance  
EPCOR 27-Sep-19 07:00 27-Sep-19 17:00 10 Hours
Continuous		 805s J2406 (805s Jasper),805s J2405 (805s Jasper),805s T4 (805s Jasper),TX4 Zone @ Jasper Doble Testing  
ENMAX, ALTALINK 27-Sep-19 08:00 27-Sep-19 16:00 8 Hours
Continuous		 50L (44s Bearspaw Plant - ENMAX 21),50L. 21.2TR. 138KV PT @ Bearspaw. 21 CAP. 21PT138-Z31 Fall Substation Washing  
CNRL 28-Sep-19 07:30 29-Sep-19 18:00 1.44 Days
Continuous		 75-PLH-902 (838s Horizon Mining - 849s Joslyn) Line Maintenance  
ENMAX, ALTALINK 28-Sep-19 12:00 28-Sep-19 18:00 6 Hours
Continuous		 21.80L (42s Sarcee - ENMAX 21),20.82L (ENMAX 21 - ENMAX 20),21.80L. 20.82L. TAU CAP. 21.1TR. 21.4TR Fall Substation Washing. Altalink required.  
ALTALINK, ATCO 29-Sep-19 17:00 01-Oct-19 17:00 2 Days
Continuous		 ALC01L (409s - ALC 01s) GOI,ALC01L (409s Shell Scotford - 408s Air Liquide Scotford) Includes 856L and ALC01L in isolation. Complete ALC01L protection upgrade.  
EPCOR 30-Sep-19 07:00 04-Oct-19 17:00 4.42 Days
Continuous		 805s T1 (805s Jasper),TX1 @ Jasper Doble Testing  
EPCOR 30-Sep-19 07:00 04-Oct-19 17:00 4.42 Days
Continuous		 L2402 @ Lambton,803s L2402 (803s Lambton) Breaker Maintenance  
CNRL 30-Sep-19 07:30 30-Sep-19 18:00 10.5 Hours
Continuous		 75-PLH-903 (838s Horizon Mining - 842s Horizon Upgrading) Line Maintenance  
SUNCOR 30-Sep-19 08:00 17-Oct-19 18:00 17.42 Days
Continuous		 29PL9-5 (29EDD-1 Millennium - 29EDD-34) 5 year maintenance  
ALTALINK 30-Sep-19 09:00 02-Oct-19 08:00 1.96 Days
Continuous		 1052L (28s-324s) - GOI,1052L (28s West Brooks - 324s Cassils) Install new air break control module for 28s289 (289)  
BCH 30-Sep-19 09:00 11-Oct-19 17:00 11.33 Days
Continuous		 2L294 (Nelway - A.A. Lambert) To install new 2SA3 & 2SSVT1 on NLY 2B3 AB-BC
ATCO 30-Sep-19 09:30 01-Oct-19 17:00 31.5 Hours
Continuous		 7L702,7L702 (137s Sedgewick - 757s Battle River) Change Arms and Insulators on 7L702  
ALTALINK 30-Sep-19 09:30 11-Oct-19 18:00 11.35 Days
Continuous		 71s T1 (71s Lamoureux),71s T1 GOI Replace T1 Bushings and maintenance  
ALTALINK 30-Sep-19 10:00 03-Oct-19 15:00 3.21 Days
Continuous		 63sT1(TX18310)& 240kV North Bus - GOI,63s T1 (63s Red Deer),63s Red Deer 240kV North Bus Migrate and commission all T1 (TX18310) & 63s24 (1552) protections, breaker fail protections, breaker, status, controls, alarms, metering, to the new RTU and LAN  
ALTALINK, ENMAX 30-Sep-19 10:00 03-Oct-19 16:00 3.25 Days
Continuous		 23.80L (74s Janet - ENMAX 23),23.80L (74s - ENMAX 23s) GOI SCADA equipment upgrade, migrate new alarms, controls, analogs and remote access to new SCADA system.  
ALTALINK 30-Sep-19 10:30 11-Oct-19 17:00 11.27 Days
Continuous		 787L(71s - 71s787X) GOI,787L (71s Lamoureux - 787L29),71s 452 (71s Lamoureux) Replace the 71s452 138kV CTs and breaker maintenance  
ALTALINK 30-Sep-19 11:00 01-Oct-19 18:00 31 Hours
Continuous		 166s part 138 Bus,787L(166s-787L3,707L (54s Fort Saskatchewan - 166s Dow Chemical Fort Saskatchewan),787L (166s Dow Chemical Fort Saskatchewan - 787L33),166s 707X (166s Dow Chem Fort Saskatchewan),166s 787W (166s Dow Chem Fort Saskatchewan) 166s1, 166s CP234, 166s CP124A, 166s CP124B, 787L33, 54s19., 166s1, 166s CP234, 166s CP124A, 166s CP124B, 787L33, 54s19.
,Switch maintenance 166s11 and others, breaker maintenance 166s787W.		  
ALTALINK 30-Sep-19 11:00 03-Oct-19 17:30 3.27 Days
Continuous		 650s 752 (650s Hansman Lake),650s752 GOI 240kV breaker maintenance, gas leak  
ENMAX, ALTALINK 30-Sep-19 12:00 30-Sep-19 18:00 6 Hours
Continuous		 832L (ENMAX 10 - ENMAX 12),832L. 10.1TR. 10PT138-Z31 Substation Washing  
ATCO 30-Sep-19 13:00 04-Oct-19 13:00 4 Days
Continuous		 7L59 FIRE DAMAGE REPAIRS  
ALTALINK 01-Oct-19 07:00 21-Oct-19 17:00 20.42 Days
Continuous		 879L (244s - 368s) - GOI,879L (368s Burdett - 244s Bowmanton) Component replacements between Structures #298 - 731  
CNRL 01-Oct-19 07:30 02-Oct-19 18:00 1.44 Days
Continuous		 75-PLH-904 (838s Horizon Mining - 842s Horizon Upgrading) Line Maintenance  
ALTALINK, EPCOR 01-Oct-19 08:00 02-Oct-19 17:00 1.38 Days
Continuous		 89s1152,89s1052 and 909L(89s-E665s) GOI,909L (89s Ellerslie - 665s Dome) Replace 89s78 Line PT’s  
ALTALINK 01-Oct-19 08:30 01-Oct-19 15:30 7 Hours
Daily		 71s1552 GOI,71s 1552 (71s Lamoureux) Low Gas  
CENOVUS 02-Oct-19 07:00 08-Oct-19 18:00 6.46 Days
Continuous		 539s PCB_9203 (539s Sunday Creek) 5 year maintenance  
CNRL 02-Oct-19 07:30 14-Oct-19 18:00 12.44 Days
Continuous		 75-TR-2701 (838s Horizon Mining) transformer maintenance.  
ALTALINK 02-Oct-19 08:30 02-Oct-19 15:30 7 Hours
Daily		 71s1352 GOI,71s 1352 (71s Lamoureux) Low Gas  
ALTALINK 02-Oct-19 08:30 03-Oct-19 15:00 30.5 Hours
Continuous		 1051L (28s-324s) - GOI,1051L (28s West Brooks - 324s Cassils) Install new air break control module for 28s1051 (489).  
ALTALINK 03-Oct-19 08:00 03-Oct-19 17:30 9.5 Hours
Daily		 1209L (89s - 330p) GOI Techs to modify logic and complete required rewiring on 89s2052, 89s2152  
EPCOR 04-Oct-19 07:00 04-Oct-19 17:00 10 Hours
Continuous		 805s T1 (805s Jasper),TX1 Zone @ Jasper Doble Testing  
ALTALINK 05-Oct-19 07:00 05-Oct-19 14:00 7 Hours
Daily		 848L (17s - 848L490E) - GOI Outage is required due to bridge construction near Structure #241  
EPCOR 06-Oct-19 07:00 06-Oct-19 17:00 10 Hours
Continuous		 920L West Castledowns - 71S Doble  
Syncrude 06-Oct-19 08:00 07-Oct-19 20:00 1.5 Days
Continuous		 Aurora T-11,72 kV Bus-2 (Aurora) support
TL-2 outage		  
ALTALINK 07-Oct-19 08:00 11-Oct-19 17:00 4.38 Days
Continuous		 347s199E & 199L (347s - 259s - 268s) GOI Change 199E breaker control module and 199E line protections to the new control building, Change out 347s7 PT.  
EPCOR 07-Oct-19 09:30 11-Oct-19 17:00 4.31 Days
Continuous		 909L-East DOME (665S) - ELLERSLIE (89S) Construction activity around line (driving piles)  
ALTALINK 07-Oct-19 10:00 10-Oct-19 15:00 3.21 Days
Continuous		 63sT2(TX18898)& 240kV South Bus - GOI,63s 25 (63s Red Deer),63s T2 (63s Red Deer),63s Red Deer 240kV South Bus Migrate and commission all T2 (TX18898) & 63s25 (1652) protections, breaker fail protections, breaker, status, controls, alarms, metering, to the new RTU and LAN  
ALTALINK 07-Oct-19 10:15 10-Oct-19 15:45 3.23 Days
Continuous		 74s C3 (74s Janet),74s C3 GOI SCADA equipment upgrade, migrate new alarms, controls, analogs and remote access to new SCADA system.  
ALTALINK 07-Oct-19 11:00 08-Oct-19 15:30 28.5 Hours
Continuous		 77s57 GOI,77s 57 (77s Sagitawah) 240kV breaker maintenance  
ATCO 07-Oct-19 13:00 11-Oct-19 13:00 4 Days
Continuous		 7L59 FIRE DAMAGE REPAIRS  
ALTALINK 08-Oct-19 08:30 08-Oct-19 17:30 9 Hours
Daily		 17s922N (17s Benalto),926L (310p Sundance - 17s Benalto),17s (926L) Open - Advice Replace Control Module for 17s926N  
ALTALINK 08-Oct-19 09:30 08-Oct-19 16:30 7 Hours
Daily		 151s733E (733L) GOI,733L (151s Strathmore - 428S Namaka) low gas  
ALTALINK 08-Oct-19 15:31 09-Oct-19 14:30 22.98 Hours
Continuous		 77s54 GOI,77s 54 (77s Sagitawah) 240kV breaker maintenance  
CENOVUS 09-Oct-19 07:00 15-Oct-19 18:00 6.46 Days
Continuous		 539s Sunday Creek 240 kV East Bus 5 year maintenance  
ALTALINK 09-Oct-19 07:30 09-Oct-19 17:30 10 Hours
Daily		 17s (C1) - GOI,17s C1 (17s Benalto) Commission new 43M switch in control building  
ALTALINK 09-Oct-19 14:31 10-Oct-19 16:30 25.98 Hours
Continuous		 77s 51 (77s Sagitawah),77s51 GOI 240kV breaker maintenance  
ALTALINK 10-Oct-19 07:00 10-Oct-19 14:00 7 Hours
Daily		 848L (17s - 848L490E) - GOI Outage is required due to bridge construction near Structure #241  
EPCOR 14-Oct-19 07:00 18-Oct-19 17:00 4.42 Days
Continuous		 987s CCP7214 (987s Clover Bar),987s CCP7213 (987s Clover Bar),987s T1 (987s Clover Bar),987s CDS25 (987s Cloverbar),T1 Tie @ Clover Bar Disconnect Aux Contacts and Doble  
ALTALINK 14-Oct-19 09:00 18-Oct-19 14:00 4.21 Days
Continuous		 928L (17s Benalto - 42s Sarcee),17s 928L (17s-42s) - GOI Replace 17s9 breaker, and breaker control and fail module. Replace control module for 17s928X, trip test to 17s8 from new 17s9 breaker control fail module. Operate s928X.  
BCH 14-Oct-19 09:00 18-Oct-19 17:00 4.33 Days
Continuous		 5L98 (BCH Nicola - Vaseux Lake) Clearance required to replace end of life insulators, install arcing horns and replace marker balls. BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK 14-Oct-19 09:00 18-Oct-19 17:00 4.33 Days
Continuous		 199L (347s Fox Creek - 741s Fox Creek),347s199W & 199L (347s - 741s) GOI Change 199W breaker control module and 199LW line protections to the new control building, Change out 347s10 PT JB.  
BCH 14-Oct-19 09:00 25-Oct-19 17:00 11.33 Days
Continuous		 1L275 (799s Coleman - Natal) Annual Plan Request F20. BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK 15-Oct-19 10:15 29-Oct-19 17:45 14.31 Days
Continuous		 74s T2 (74s Janet) 74s T2 reclaim oil, download IDD data, new hydrean sensor, corrosive sulfur mitigation, fix leaks  
CENOVUS 16-Oct-19 07:00 22-Oct-19 18:00 6.46 Days
Continuous		 539s Sunday Creek 240 kV West Bus 5 year maintenance  
ALTALINK 16-Oct-19 09:00 16-Oct-19 15:00 6 Hours
Daily		 64s T1,240kV Bus & 138kV Bus 1 GOI,T2,64s T1 (64s East Crossfield),64s T2 (64s East Crossfield) Breaker and breaker protection outage for 64s901 and 64s652 (new 138kV bus tie) to test new trips from 64s652 Breaker Protection and to test block closes from MODs 64s33, 64s34.  
SUNCOR 18-Oct-19 08:00 03-Nov-19 18:00 16.46 Days
Continuous		 29PL9-6 (29EDD-1 Millennium - 29EDD-34) 5 year maintenance  
ALTALINK 18-Oct-19 14:30 25-Oct-19 16:30 7.08 Days
Continuous		 17s 9 (17s Benalto),17s9 - GOI Continue to Replace 17s9 breaker, and breaker control and fail module  
EPCOR 19-Oct-19 07:00 01-Nov-19 17:00 13.42 Days
Continuous		 CV5 (557s Castle Downs - 511s Victoria),CV5 @ Castledowns & Victoria CV5 240kV Splice/ Termination  
ALTALINK 19-Oct-19 08:00 19-Oct-19 10:00 2 Hours
Continuous		 17s 16 (17s Benalto),17s C1 (17s Benalto),17s79 (C1) - Advice Cutover Breaker Fail Trip from old 17s9 Protection to new Protection and complete Functional Trip Test.  
ALTALINK 19-Oct-19 11:00 19-Oct-19 13:30 2.5 Hours
Daily		 17s77 - Advice,17s 13 (17s Benalto) Cutover Breaker Fail Trip from old 17s9 Protection to new Protection and complete Functional Trip Test  
ALTALINK 19-Oct-19 14:30 19-Oct-19 16:30 2 Hours
Daily		 17s 4 (17s Benalto),17s34 - Advice Cutover Breaker Fail Trip from old 17s9 Protection to new Protection and complete Functional Trip Test  
ALTALINK 20-Oct-19 08:00 20-Oct-19 10:00 2 Hours
Continuous		 17s23 - Advice,17s 3 (17s Benalto) Cutover Breaker Fail Trip from old 17s9 Protection to new Protection and complete Functional Trip Test  
ALTALINK 20-Oct-19 11:00 20-Oct-19 13:30 2.5 Hours
Daily		 17s 1652 (17s Benalto),17s43 - Advice Cutover Breaker Fail Trip from old 17s9 Protection to new Protection and complete Functional Trip Test  
ALTALINK 20-Oct-19 14:30 20-Oct-19 16:30 2 Hours
Daily		 17s84 - Advice,17s 85 (17s Benalto) Cutover Breaker Fail Trip from old 17s9 Protection to new Protection and complete Functional Trip Test  
EPCOR 21-Oct-19 07:00 21-Oct-19 17:00 10 Hours
Continuous		 805s J2403 (805s Jasper),J2403 @ Jasper Substation Switch and breaker operation for Nait Student Demo  
EPCOR 21-Oct-19 07:00 25-Oct-19 17:00 4.42 Days
Continuous		 1098L (805s Jasper - Poundmaker),1098L (Jasper - Poundmaker) Line Maintenance & Upgrades  
ALTALINK 21-Oct-19 07:00 25-Oct-19 17:00 4.42 Days
Continuous		 1098L (37s-EPOUND_M) Epcor - Info Line Maintenance & Upgrades  
BCH 21-Oct-19 09:00 01-Nov-19 17:00 11.33 Days
Continuous		 2L112 (Nelway - Boundary) annual plan request F19. BC Maintenance does not affect the Alberta ATC AB-BC
EPCOR 21-Oct-19 09:30 25-Oct-19 17:00 4.31 Days
Continuous		 1059L (Lambton - East Ind /38S) Line Maintenance & Upgrades  
ALTALINK 21-Oct-19 10:00 21-Oct-19 14:00 4 Hours
Daily		 777L (245s Seebe - 48s Pocaterra),777L (48s - 245s) - GOI FortisAlberta Kananaskis Area Reliability Project: Connect high side of 471s mobile.  
ALTALINK 21-Oct-19 10:00 24-Oct-19 15:00 3.21 Days
Continuous		 914L (63s - 87s) - Advice,914L (87s Gaetz - 63s Red Deer) Migrate and commission all L5 – 914L at 63S Red Deer associated line protections, breakers, breaker fail and Tele-protection alarms, status, controls, metering and remote access to new RTU and LAN. Migrate and commission VT-5 alarms. Replace and commission new 63S914N (789) airbreak control module.Salvage L5-914L SCADA metering module.  
ALTALINK 21-Oct-19 10:00 24-Oct-19 16:00 3.25 Days
Continuous		 74s T2 Advice,74s T2 (74s Janet) SCADA equipment upgrade, migrate new alarms, controls, analogs and remote access to new SCADA system.  
EPCOR 22-Oct-19 07:00 22-Oct-19 17:00 10 Hours
Continuous		 1202 BKR bay @ Genesee Doble  
ALTALINK 22-Oct-19 08:15 24-Oct-19 15:45 2.31 Days
Continuous		 632s PS1 (TX18793) - GOI,632PS (632s Russell) Maintain phase shifter transformer, doble test & update qualitrol AB-BC
ALTALINK 22-Oct-19 08:30 29-Oct-19 15:30 7.29 Days
Continuous		 370s47 & 370s51 (affect 1041L) GOI,1041L (370s North Lethbridge - 554s Travers) Replace 370s48 and 370s50.  
EPCOR 23-Oct-19 07:00 23-Oct-19 17:00 10 Hours
Continuous		 1204 BKR Bay @ Genesee Doble  
ALTALINK 23-Oct-19 08:00 23-Oct-19 18:00 10 Hours
Continuous		 899L,862L GOI,166s part 138 Bus,166s T1 (166s Dow Chemical Fort Saskatchewan),166s T3 (166s Dow Chemical Fort Saskatchewan),707L (54s Fort Saskatchewan - 166s Dow Chemical Fort Saskatchewan),899L (166s Dow Chemical Fort Saskatchewan - 218s Fort Saskatchewan Co-Gen),862L (166s Dow Chemical Fort Saskatchewan - 258s Dow Hydro Carbons),166s 707X (166s Dow Chem Fort Saskatchewan) Switch maintenance 166s1 and others, breaker maintenance 166s707X.  
ALTALINK 23-Oct-19 08:30 24-Oct-19 15:00 30.5 Hours
Continuous		 28s T1 (28s West Brooks),28s 240kV Bus 1 (28s West Brooks),28s T1(Tx18701)& 240 kV Bus1 - GOI Install new air break control module for 28s15 (89)  
EPCOR 24-Oct-19 07:00 24-Oct-19 17:00 10 Hours
Continuous		 1209 BKR Bay @ Genesee Doble  
ALTALINK 24-Oct-19 07:00 24-Oct-19 17:00 10 Hours
Daily		 848L (17s - 848L490E) - GOI Outage is required due to bridge construction near Structure #241  
BCH 25-Oct-19 09:00 25-Oct-19 17:00 8 Hours
Continuous		 5L76 (Ashton Creek - Nicola) ACK 5D22 Inspection. BC Maintenance does not affect the Alberta ATC AB-BC
EPCOR 26-Oct-19 07:00 26-Oct-19 17:00 10 Hours
Continuous		 12BU1 @ Genesee Doble  
EPCOR 27-Oct-19 07:00 27-Oct-19 17:00 10 Hours
Continuous		 12BU2 @ Genesee Doble  
ALTALINK 28-Oct-19 07:00 08-Nov-19 17:00 11.46 Days
Continuous		 777L (245s Seebe - 48s Pocaterra),777L (48s - 245s) - GOI Fire mitigation work replacing structures, crossarms and insulators AB-BC
SUNCOR 28-Oct-19 08:00 02-Nov-19 18:00 5.42 Days
Continuous		 29PL7-1 (29EDD-34 - 29EDD-85) replace damaged contacts  
ALTALINK 28-Oct-19 08:30 01-Nov-19 16:30 4.33 Days
Daily		 17s8 - GOI,17s 8 (17s Benalto) Replace 17s8 breaker control and fail module  
ALTALINK 28-Oct-19 09:00 30-Oct-19 08:00 1.96 Days
Continuous		 28s T1(Tx18701)& 138 kV Bus1 - GOI,28S West Brooks 138kV Bus 1,28s T1 (28s West Brooks) Install new air break control module for 28s20 (1389)  
ALTALINK 28-Oct-19 12:45 03-Nov-19 17:45 6.25 Days
Continuous		 281s T1 (Tx18897) - GOI,281s T1 (281s Johnson) Repair Leak and Tx testing  
ALTALINK 30-Oct-19 08:30 31-Oct-19 15:00 30.5 Hours
Continuous		 28s West Brooks 240 kV Bus 2,28s T2 (28s West Brooks),28s T2(Tx18775)& 240 kV Bus2 - GOI Install new air break control module for 28s50 (1489).  
ALTALINK 31-Oct-19 13:00 31-Oct-19 16:00 3 Hours
Daily		 928L (17s Benalto - 42s Sarcee),17s39 (928L-Open) - Advice Trip test to 17s9 from new 17s8 breaker fail  
ALTALINK 01-Nov-19 08:00 01-Nov-19 16:00 8 Hours
Daily		 17s (903L-Open) - Advice,903L (17s Benalto - 320p Keephills) Replace control module for 17s903N, trip test to 17s7 from new 17s8 breaker fail. Operate s903N.  
ENMAX 02-Nov-19 08:00 30-Nov-19 18:00 28.46 Days
Continuous		 25s. 2GSU GT2 HV SW MD maint SW138, SW139, MD-2GSU. Doble 240kV 25MCT2, 25PT240-Z44  
ENMAX 04-Nov-19 08:00 08-Nov-19 16:00 4.33 Days
Continuous		 23.80L HVB heater retrofit - 23B138-23.80  
ALTALINK 04-Nov-19 08:30 08-Nov-19 16:30 4.33 Days
Daily		 17s7 - GOI,17s 7 (17s Benalto) Replace breaker control and fail module  
ALTALINK 04-Nov-19 09:00 06-Nov-19 08:00 1.96 Days
Continuous		 28S West Brooks 138kV Bus 2,28s T2(Tx18775)& 138 kV Bus2 - GOI Install new air break control module for 28s49 (1589).  
ALTALINK 04-Nov-19 10:00 08-Nov-19 15:00 4.21 Days
Continuous		 900L (63s-17s) - Advice,900L (63s Red Deer - 17s Benalto) Migrate and commission all L1 – 900L at 63S Red Deer associated line protections, breakers, breaker fail and Tele-protection alarms, status, controls, metering and remote access to new RTU and LAN. Migrate and commission VT-1 alarms. Replace and commission new 63S900W (389) airbreak control module.  
ALTALINK, Lethbridge 06-Nov-19 08:00 09-Nov-19 17:00 3.38 Days
Continuous		 824L (593s Lethbridge Lakeview - 618s Riverbend) Set anchors in advance of 824L Outage  
CapitalPower 07-Nov-19 07:00 07-Nov-19 17:00 10 Hours
Continuous		 615S Halkirk Attach new in out station  
ALTALINK 08-Nov-19 08:00 08-Nov-19 09:30 90 Mins
Daily		 17s 11 (17s Benalto),17s57 - Advice Trip test 17s11 from new 17s7 breaker control and fail module  
ALTALINK 08-Nov-19 09:30 08-Nov-19 11:30 2 Hours
Daily		 17s26 - Advice,17s 6 (17s Benalto) Trip test 17s6 from new 17s7 breaker control and fail module  
ALTALINK 08-Nov-19 12:00 08-Nov-19 13:30 90 Mins
Daily		 17s 1 (17s Benalto),17s31 - Advice Trip test 17s1 from new 17s7 breaker control and fail module  
ALTALINK 08-Nov-19 14:00 08-Nov-19 15:30 90 Mins
Daily		 17s42 - Advice,17s 10 (17s Benalto) Trip test 17s10 from new 17s7 breaker control and fail module  
ALTALINK 08-Nov-19 15:30 08-Nov-19 17:00 90 Mins
Daily		 17s T3 (17s Benalto),17s46 (T3)- Advice Trip test 17s2852 from new 17s7 breaker control and fail module  
ALTALINK 08-Nov-19 17:30 08-Nov-19 19:00 90 Mins
Daily		 17s8 (903L-Open) - Advice,903L (17s Benalto - 320p Keephills) Trip test 17s8 from new 17s7 breaker control and fail module  
ALTALINK, EPCOR 12-Nov-19 08:00 03-Dec-19 18:00 21.42 Days
Continuous		 1139L GOI,1139L (367s Harry Smith - 816s Petrolia) Cutting in EPCOR new sub (Riverview)  
BCH 12-Nov-19 09:00 22-Nov-19 17:00 10.33 Days
Continuous		 1L274 (48s Pocaterra - Britt Creek) annual maintenance AB-BC
ALTALINK 12-Nov-19 10:00 14-Nov-19 15:00 2.21 Days
Continuous		 925L (63s Red Deer - 74s Janet),925L (63s-74s) - Advice Migrate and commission all L6 – 925L at 63S Red Deer associated line protections, breakers, breaker fail and Tele-protection alarms, status, controls, metering and remote access to new RTU and LAN. Migrate and commission VT-6 alarms. Replace and commission new 63S925X (489) airbreak control module.  
ALTALINK, ENMAX 12-Nov-19 10:00 15-Nov-19 16:00 3.25 Days
Continuous		 37.82L (74s Janet - ENMAX 37),37.82L (74s - ENMAX 37SUB) Advice SCADA equipment upgrade, migrate new alarms, controls, analogs and remote access to new SCADA system.  
EPCOR 18-Nov-19 07:00 22-Nov-19 17:00 4.42 Days
Continuous		 52s T1 (52s East Industrial),TX1@ East Industrial CVT Replacement  
ENMAX 18-Nov-19 08:00 19-Dec-19 16:00 31.33 Days
Continuous		 918L Line Protection Upgrade  
EPCOR 18-Nov-19 09:30 22-Nov-19 17:00 4.31 Days
Continuous		 909L - East (Dome - Ellerslie) Insulation & Aerial Marker Upgrades  
ALTALINK 18-Nov-19 10:00 21-Nov-19 15:00 3.21 Days
Continuous		 1083L (63s-288s) - Advice,1083L (63s Red Deer - 288s Wolf Creek) Migrate and commission all L3 –1083L at 63S Red Deer associated line protections, breakers, breaker fail and Tele-protection alarms, status, controls, metering and remote access to new RTU and LAN. Migrate and commission VT-3 alarms. Replace and commission new 63S1083W (589) airbreak control module.  
ALTALINK, ENMAX 18-Nov-19 10:00 21-Nov-19 16:00 3.25 Days
Continuous		 74s 2452 (74s Janet),74s 2352 (74s Janet),985L (ENMAX 25 - 74s Janet),985L (74s - ENMAX 25SUB) Advice SCADA equipment upgrade, migrate new alarms, controls, analogs and remote access to new SCADA system.  
ALTALINK 25-Nov-19 10:00 28-Nov-19 15:00 3.21 Days
Continuous		 912L (63s Red Deer - 766s Nevis),912L (63s-766s) - Advice Migrate and commission all L4 – 912L at 63S Red Deer associated line protections, breakers, breaker fail and Tele-protection alarms, status, controls, metering and remote access to new RTU and LAN. Migrate and commission VT-4 alarms. Replace and commission new 63s912E (889) airbreak control module.  
ALTALINK, ENMAX 25-Nov-19 10:00 28-Nov-19 16:00 3.25 Days
Continuous		 1003L (74s - ENMAX 25SUB) Advice,74s 2152 (74s Janet),74s 2252 (74s Janet),1003L (74s Janet - ENMAX 25) SCADA equipment upgrade, migrate new alarms, controls, analogs and remote access to new SCADA system.  
ENMAX 27-Nov-19 08:00 08-Dec-19 18:00 11.42 Days
Continuous		 36.81L. Haskayne line raise project. Raising the line and replacing 4 structures to accommodate a new road construction.  
BCH 02-Dec-19 09:00 13-Dec-19 17:00 11.33 Days
Continuous		 1L274 (48s Pocaterra - Britt Creek) annual maintenance AB-BC
ALTALINK 02-Dec-19 10:00 05-Dec-19 15:00 3.21 Days
Continuous		 912L (63s-766s) - Advice,912L (63s Red Deer - 766s Nevis) Migrate and commission all L7 –1082 at 63S Red Deer associated line protections, breakers, breaker fail and Tele-protection alarms, status, controls, metering and remote access to new RTU and LAN. Migrate and commission VT-7 alarms. Replace and commission new 63S1082 (1189) airbreak control module.  
ALTALINK 02-Dec-19 10:30 05-Dec-19 15:30 3.21 Days
Continuous		 74s C4 GOI SCADA equipment upgrade, migrate new alarms, controls, analogs and remote access to new SCADA system.  
CapitalPower 07-Dec-19 07:00 12-Dec-19 17:00 5.42 Days
Continuous		 615S Halkirk Reroute OPGW test and commission.  
ALTALINK 09-Dec-19 10:00 12-Dec-19 15:30 3.23 Days
Continuous		 74s C3 Advice SCADA equipment upgrade, migrate new alarms, controls, analogs and remote access to new SCADA system.  
ATCO 06-Jan-20 08:00 20-Jan-20 16:00 14.33 Days
Continuous		 740s 701 (740s H.R. Milner),740S 701 replace breaker and re conductor switches  
ATCO 07-Jan-20 08:00 27-Jan-20 17:00 20.38 Days
Continuous		 834S 902T,834s 902T (834s Wesley Creek) Three Creeks Project
Install the 240 kV switches (close proximity to energized bus)		  
ATCO 13-Jan-20 08:00 17-Jan-20 17:00 4.38 Days
Continuous		 7L131 (834s Wesley Creek - 905s Meikle),7L131 To facilitate the installation of the new 9L124 and 9L139 we need to lower 7L08, 7L131 and 7L106  
ATCO 20-Jan-20 07:00 23-Jan-20 16:00 3.38 Days
Continuous		 9L59,9L59 (972s Tinchebray - 801s Anderson) Outage for Garden Plain Wind Project  
ATCO 20-Jan-20 08:00 24-Jan-20 17:00 4.38 Days
Continuous		 7L106 (834s Wesley Creek - 905s Meikle),7L106 To facilitate the installation of the new 9L124 and 9L139 we need to lower 7L08, 7L131 and 7L106  
ATCO 20-Jan-20 08:00 03-Feb-20 16:00 14.33 Days
Continuous		 740S 704,7L20,740s 704 (740s H.R. Milner),7L20 (810s Dome Cutbank - 740s H.R.Milner) replace breaker and re conductor switches  
ALTALINK 28-Jan-20 07:15 29-Jan-20 17:45 1.44 Days
Continuous		 788L (788L107A-A898s-602L1) - GOI 788L Components Str's Range 151-282  
ENMAX 03-Feb-20 08:00 14-Feb-20 16:00 11.33 Days
Continuous		 162.81L Line Protection Upgrade  
ALTALINK 03-Feb-20 12:15 06-Feb-20 17:45 3.23 Days
Continuous		 794L (157s-A819s) - GOI 794L Components Str's Range 9-258  
ATCO 06-Mar-20 07:00 13-Mar-20 17:00 7.38 Days
Continuous		 9L101 (2005s Secord - 957s McClelland),9L101 Line move for mine expansion.
Attach new line to existing 9L101		  
ATCO 02-Jul-20 08:00 15-Jul-20 16:00 13.33 Days
Continuous		 7L587 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ATCO 16-Jul-20 08:00 29-Jul-20 16:00 13.33 Days
Continuous		 7L89 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ATCO 30-Jul-20 08:00 12-Aug-20 16:00 13.33 Days
Continuous		 7L91 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ATCO 03-Aug-20 07:00 03-Nov-20 17:00 92.46 Days
Continuous		 972S 905B,972s 905B (972s Tinchebray) Halkirk 2 Windfarm Project  
ATCO 03-Aug-20 08:00 15-Nov-20 16:00 104.38 Days
Continuous		 RL1,9L01 (848s Dover - 951s Thickwood),9L01,848S 901T,848S 902T,848s 901T (848s Ruth Lake),848s 902T (848s Ruth Lake),848S 900BS2,848S 900BS1 848S Ruth Lake 240kv expansion  
ALTALINK 11-Aug-20 08:00 11-Aug-20 18:00 10 Hours
Daily		 861L(258s-71s) and 258s 138kV Bus 2 GOI Replacement of 861L Strain Insulators at 258s. Remove Bus #2 from service as line crosses 138kV Bus.  
ALTALINK 11-Aug-20 08:00 11-Aug-20 19:00 11 Hours
Daily		 862L(258s-166s) and 258s 138kV Bus 1 GOI Replacement of 862L Strain Insulators at 258s. Remove Bus #1 from service as line crosses 138kV Bus.  
ATCO 13-Aug-20 08:00 26-Aug-20 16:00 13.33 Days
Continuous		 9L36 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ATCO 27-Aug-20 08:00 09-Sep-20 16:00 13.33 Days
Continuous		 9L37 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ATCO 10-Sep-20 08:00 01-Oct-20 16:00 21.33 Days
Continuous		 826S 901T 240/144kV Breaker Fail Protection
(901T OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ATCO 14-Sep-20 07:00 23-Sep-20 17:00 9.42 Days
Continuous		 972S 900BS1 Installing new 240Kv Bay (connect 907B to BUS 1) for 620S Goldeye substation connection  
SUNCOR, ATCO 14-Sep-20 08:00 20-Sep-20 18:00 6.42 Days
Continuous		 29PL9-2 (29EDD-1 Millennium - 848s Ruth Lake),29EDD-1 Millennium 5yr and 10 yr maintenance on 29CTT-1 in 29EDD-1  
SUNCOR, ATCO 14-Sep-20 09:00 20-Sep-20 18:00 6.38 Days
Continuous		 29PL9-2 (29EDD-1 Millennium - 848s Ruth Lake),29EDD-1 Millennium 5 and 10 year maintenance  
ATCO 23-Sep-20 07:00 25-Sep-20 17:00 2.42 Days
Continuous		 972S 900BS2,9L16 (972s Tinchebray - 755s Cordel),9L16 Installing new 240Kv Bay (connect 909A to BUS 2) for 620S Goldeye substation connection
Cutover 9L16 to New Bay		  
ATCO 25-Sep-20 07:00 28-Sep-20 17:00 3.42 Days
Continuous		 9L177 Installing new 240Kv Bay for 620S Goldeye substation connection
Cutover 9L177 to New Bay		  
ATCO 28-Sep-20 07:00 29-Sep-20 17:00 1.42 Days
Continuous		 9L62 Installing new 240Kv Bay for 620S Goldeye substation connection
String 9L62 into 972S Tinchebray		  
ATCO 02-Oct-20 08:00 23-Oct-20 16:00 21.33 Days
Continuous		 826S 902T 240/144kV Breaker Fail Protection
(902T OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ATCO, ALTALINK 22-Oct-20 07:00 27-Oct-20 17:00 5.42 Days
Continuous		 7L65,7L77,7L65 (709s Vegreville - 710s Vermilion),7L77 (395s North Holden - 709s Vegreville) 7L65 Rebuild Project  
ATCO 15-Dec-20 07:00 23-Dec-20 17:00 8.42 Days
Continuous		 730s 704 (730s Rycroft),730S 704,730S 702,7L73 (730s Rycroft - 829s Boucher Creek),730s 703 (730s Rycroft),730s 702 (730s Rycroft) SVC addition and 144 kv bus rebuild.  
ATCO 05-Jan-21 08:00 08-Jan-21 16:00 3.33 Days
Continuous		 9L20 (766s Nevis - 755s Cordel),9L20 56772 Nevis Transformer Addition
9L20 Open -ended		  
ATCO 09-Jan-21 08:00 12-Jan-21 16:00 3.33 Days
Continuous		 9L912,9L912 (766s Nevis - 63s Red Deer) 56772 Nevis Transformer Addition
9L912 Open -ended		  
ATCO 20-Jan-21 08:00 23-Feb-21 16:00 34.33 Days
Continuous		 951S 906,951S 903,951S 908,951S 900BS2 951S construction for 9L162 & 9L193 addition  
ATCO 25-Jan-21 08:00 26-Jan-21 16:00 1.33 Days
Continuous		 9L912,9L20,766S 901T 56772 Nevis Transformer Addition
Tie-in to the new bus for 902T
901T OOS
9L20 OPEN-ENDED
9L912 OPEN-ENDED		  
ATCO 15-Feb-21 07:00 02-Mar-21 17:00 15.42 Days
Continuous		 972S 900BS2,9L16 Outage on 907B and 908A for the installation and commissioning of 907 and 907CT  
ATCO 24-Feb-21 08:00 26-Feb-21 16:00 2.33 Days
Continuous		 951S 900BS1 951S construction for 240kv expansion - 9L162 & 9L193 addition  
ATCO 01-Mar-21 07:00 02-Mar-21 17:00 1.42 Days
Continuous		 972S 900BS2,9L16 -1 Outage on 9L16 to cut the line over to the new bay  
ATCO 08-Mar-21 07:00 12-Mar-21 17:00 4.42 Days
Continuous		 9L177 Installing new 240Kv Bay (connect 907B to BUS 1) for 620S Goldeye substation 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: 2019-08-21   1:42:16 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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