Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2020-05-30

The table below contains the significant transmission outages submitted as tentative to the AESO.
These Outages have not yet necessarily been approved, but are listed for awareness and coordination purposes.
An Outage has been considered significant for this table if it meets any one (1) or more of the following criteria:
  1. it affects a transmission facility operating at two hundred and forty (240) kV or greater;
  2. it affects an intertie;
  3. it affects an element connecting facilities owned by two (2) or more different legal owners of transmission facilities;
  4. it affects an element that connects a generating unit or an aggregated generating facility to the interconnected electric system;
  5. it requires the ISO to issue a dispatch or directive for generation in order to facilitate the planned outage;
  6. it affects a cutplane limit;
  7. it limits or reduces the operability of a synchronous condenser, static VAr compensator, static compensator or other similar dynamic device; or
  8. it affects high voltage direct current facilities.
Note: Where a transmission outage requires generation curtailments, the adjustments to generation will typically happen in the hours before the scheduled transmission outage and in the hour after the element is returned to service.

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Owner From To Duration Element Scheduled Activity Affected Intertie
ATCO 24-Jan-20 08:00 03-Jul-20 16:00 161.29 Days
Continuous		 2029s ACF13 (2029s Heathfield) Forced outage repairs  
ALTALINK 22-May-20 16:00 01-Jun-20 13:00 9.88 Days
Continuous		 336s 607 (336s Fincastle), 336s 610 (336s Fincastle) 610L/607L bypassed at 336s  
ATCO 25-May-20 07:00 05-Jun-20 15:00 11.33 Days
Continuous		 2029s ACF12 (2029s Heathfield) perform PRC-005 tests on all devices associated with ACF12 and breaker 1219  
ATCO 25-May-20 08:00 07-Jun-20 16:00 13.33 Days
Continuous		 7L91 (715s Leming Lake - 826s Marguerite Lake) 240/144kV breaker fail protection and 826S Marguerite protection upgrade  
ATCO 25-May-20 10:00 07-Jun-20 16:00 13.25 Days
Continuous		 7L59 (789s Keg River - 7L59 tap) cross- arm change out  
ALTALINK 29-May-20 07:00 31-May-20 18:00 2.46 Days
Continuous		 995L (62s Brazeau - 995AL) relocate structures 1 - 5  
EPCOR 29-May-20 07:00 03-Jun-20 17:00 5.42 Days
Continuous		 1055L (629s Argyll Transfer Station - 816s Petrolia) line maintenance  
EPCOR 01-Jun-20 07:00 01-Jun-20 17:00 10 Hours
Continuous		 East Industrial TX2 Maintenance (Tap Changer)  
EPCOR 01-Jun-20 07:00 02-Jun-20 17:00 1.42 Days
Continuous		 1209 Maint./ Doble  
EPCOR 01-Jun-20 07:00 05-Jun-20 17:00 4.42 Days
Continuous		 Summerside TX2 Doble / SFRA  
EPCOR 01-Jun-20 07:00 12-Jun-20 17:00 11.42 Days
Continuous		 Riverview S/S RW2403 breaker bay outage Breaker repair for vendor deficiency  
ENMAX 01-Jun-20 08:00 01-Jun-20 16:00 8 Hours
Continuous		 693L HV Breaker Maintenance 10B138-693. SF6 sample.  
ALTALINK 01-Jun-20 08:00 02-Jun-20 17:00 1.38 Days
Daily		 62s196 (995L) - ADVICE Required to close Open Point 'A' south of structure 5 on 995L outside of 62s. Scheduled: Shannon Bouchard Issue To: Ted Graham Contact #: 778.214.6493  
ALTALINK 01-Jun-20 08:00 30-Jun-20 17:00 29.38 Days
Continuous		 50L (44s - 21s) GOI Calgary Ring Road 50L line clearance: Modify STR 131-132. Replace STR 133-135 and re-string 133-134. Replace STR 141, 143, remove STR 142 and re-string 141-143 span  
ALTALINK 01-Jun-20 08:15 05-Jun-20 17:45 4.4 Days
Continuous		 777L (48s - 245s) GOI Urgent Line Clearance (Str 49 - 207) AB-BC
ATCO 01-Jun-20 09:00 05-Jun-20 16:00 4.29 Days
Continuous		 7L32 X-arm change out  
ALTALINK 01-Jun-20 09:30 04-Jun-20 16:30 3.29 Days
Continuous		 510s1152 (ACF 11) - GOI Annual inspection & maintenance  
ALTALINK 01-Jun-20 11:00 01-Jun-20 16:00 5 Hours
Daily		 610L (336s - 83s) GOI Fincastle Fortis Capacity Increase Project: Removal of Temp bypass conductors connected to 610L and restor anti-Islanding scheme to normal  
ATCO 01-Jun-20 11:00 05-Jun-20 17:00 4.25 Days
Continuous		 813S SVC Yearly maintenance - Glycol is being changed - drain, flush, refill, Fittings and tubing will be changed as fittings have been leaking.  
ALTALINK 01-Jun-20 11:30 03-Jun-20 17:30 2.25 Days
Daily		 1148L (251s - 1018s) RB LL Corona Issue; three locations (Str's 3, 8, 25) 251s reactor (R1) to come out of service periodically for testing purposes and then placed back into service  
ALTALINK 01-Jun-20 12:00 01-Jun-20 17:00 5 Hours
Daily		 903L (320P - 17s) - GOI Replace damaged 903L relay FT switch  
ALTALINK 01-Jun-20 12:30 01-Jun-20 17:30 5 Hours
Daily		 324s1252 GOI replace burned out heater on west phase  
ENMAX 02-Jun-20 08:00 02-Jun-20 16:00 8 Hours
Continuous		 832L HV breaker maintenance 10B138-832L. SF6 sample  
ALTALINK 02-Jun-20 08:30 02-Jun-20 17:30 9 Hours
Daily		 324s1152 GOI top up west phase and investigate leak  
ALTALINK 02-Jun-20 09:00 12-Jun-20 14:00 10.21 Days
Continuous		 909L (310p - E665s) - GOI Components/Structure Replacements (Structures #1B - 214)  
ALTALINK 03-Jun-20 07:00 03-Jun-20 21:00 14 Hours
Daily		 745AL (39s-411s-975s-602s) - GOI Scope of work includes maintenance on Structures 745ALJCT- 745AL3 & 745A1L1 on 745AL1 and Str’s 4, 7, 8 and 9 on 745AL and Str’s 358, 561, 572 and 575 on 745L. Scheduled: Shannon Bouchard Issue To: Ken Teasdale Contact #: 403.360.4960  
EPCOR 03-Jun-20 07:00 04-Jun-20 17:00 1.42 Days
Continuous		 Genesee 1204 Breaker Doble and Breaker Mtce  
ATCO 03-Jun-20 08:00 04-Jun-20 17:00 1.38 Days
Continuous		 7L105, 837S 702 CT Change - Coordinated with imperial oil Shutdown  
ALTALINK 03-Jun-20 08:00 04-Jun-20 18:00 1.42 Days
Continuous		 90L (115s - 32s) GOI Scope of work consists of replacing Str 4 and maintenance on Str 36  
ALTALINK 03-Jun-20 08:30 03-Jun-20 17:30 9 Hours
Daily		 324s1552 GOI top up C phase - low gas and investigate leak  
ALTALINK 03-Jun-20 08:30 04-Jun-20 17:00 1.35 Days
Continuous		 574s T1 TX18796 - GOI PRC-5 574sT1 Maintenance & Doble. Neutral conductor replacement, Oil Leak, AC supply and SFRA Testing.  
EPCOR 05-Jun-20 07:00 08-Jun-20 17:00 3.42 Days
Continuous		 1056L Line Maintenance  
CUPCAN 07-Jun-20 08:00 10-Jun-20 16:00 3.33 Days
Continuous		 850S Rainbow Cogen transfer load to RB5, for RB4 isolation

June 10 expand GOI to include 705A @ 791S and 702TD, 701PT @ 850S
Units 4 & 5 will be disconnected from the BES Grid on June 10th		  
EPCOR 08-Jun-20 07:00 12-Jun-20 17:00 4.42 Days
Continuous		 Summerside TX1 Doble / SFRA  
ALTALINK 08-Jun-20 07:00 17-Jun-20 13:30 9.27 Days
Continuous		 77s T1, 240kV & 138kV West Bus - GOI Replace T1 'A', T1 'B', 240B1 Protections. T1 Maintenance.  
ALTALINK 08-Jun-20 07:30 11-Jun-20 16:30 3.38 Days
Continuous		 511s1252 (ACF 11) - GOI Annual inspection & maintenance  
ATCO 08-Jun-20 08:00 21-Jun-20 16:00 13.33 Days
Continuous		 7L89 240/144kV Breaker Fail Protection (OOS for duration of outages)
826S Marguerite P&C Upgrade, Cutover 7L89 21A and 21B PT, CT, and P&C ccts		  
ENMAX 08-Jun-20 08:00 21-Jun-20 16:00 13.33 Days
Continuous		 162.2TR (ENMAX 162 Beddington) Transformer differential relay replacement. Commission circuits. HV SW maint SW105, SW89, SW88, SW136, SW146, MD138-162.2TR, MD240-162.2TR. Oil sampling MT, TC, Bushings. Check reversing switch. Replace switch mech SW136. Oil top up PT Z44  
ATCO 08-Jun-20 09:00 12-Jun-20 16:00 4.29 Days
Continuous		 7L32 X-arm change out  
ATCO 08-Jun-20 09:30 08-Jun-20 13:00 3.5 Hours
Continuous		 789S 701, 7L64 PRC-005 - TRIP COIL TESTING - BREAKER 701 @ 789S

7L64 will be Open Ended for duration of work.		  
EPCOR 08-Jun-20 09:30 08-Jun-20 16:00 6.5 Hours
Continuous		 915L Doble Testing  
ALTALINK 08-Jun-20 09:30 12-Jun-20 17:30 4.33 Days
Continuous		 38s7552 - GOI Maintenance on 38s7552 breaker & grading cap replacement. 1st Trip, 1st Close, 2nd Trip testing  
ATCO 08-Jun-20 13:00 08-Jun-20 16:30 3.5 Hours
Continuous		 789S 702, 7L62 PRC-005 - Trip coil testing breaker 702 @ 789S, 7L62 will be Open Ended for duration of work.  
ALTALINK 09-Jun-20 08:00 09-Jun-20 16:00 8 Hours
Daily		 347s Radio - TPR Radio testing. Affects 259s Chickadee Creek TPR.  
ALTALINK 09-Jun-20 08:00 09-Jun-20 16:00 8 Hours
Daily		 285s MPLS - TPR/RTU Upgrade MPLS node. Affects DG transfer trip for 20 minutes. Loss of visibility of 285s for 20 minutes in the timeframe indicated.  
EPCOR 09-Jun-20 08:00 10-Jun-20 16:00 1.33 Days
Continuous		 947L Doble Testing  
ATCO 09-Jun-20 08:30 09-Jun-20 12:30 4 Hours
Continuous		 789S 703, 7L59 PRC-005 - Trip coil testing breaker 703 @ 789S, 7L59 will be Open Ended for duration of work.  
ALTALINK 09-Jun-20 09:00 11-Jun-20 14:30 2.23 Days
Continuous		 275s2 GOI Urgent repair; leak on one phase  
ATCO 09-Jun-20 12:30 09-Jun-20 16:30 4 Hours
Continuous		 789S 704, 7L58 PRC-005 - Trip coil testing breaker 704 @ 789S, 7L58 will be Open Ended for duration of work.  
ATCO 10-Jun-20 08:00 10-Jun-20 12:00 4 Hours
Continuous		 791S 705 Test new RB4 protection  
ALTALINK 13-Jun-20 06:00 14-Jun-20 18:00 1.5 Days
Continuous		 391s25 (PCES02L) GOI PCES02L protection upgrade (AML end), grading caps (391s25)  
PANC 13-Jun-20 07:00 14-Jun-20 18:00 1.46 Days
Continuous		 PCES02L (391s Balzac - PCES02S Balzac Power Station) replace pole  
ALTALINK 13-Jun-20 08:00 13-Jun-20 17:00 9 Hours
Daily		 1241L/12L41 (510s - A939s) -De-Energized EPCOR outage on 1209L for Doble testing, requires de- energizing of 12L41 outage due to risk of forming Genesee Island with the HVDC facilities at 510s Sunnybrook  
EPCOR 13-Jun-20 08:00 14-Jun-20 17:00 1.38 Days
Continuous		 Genesee 1209L Doble and Aerial Marker Upgrades  
ALTALINK 15-Jun-20 06:00 22-Jun-20 18:30 7.52 Days
Continuous		 285s 138kV South Bus - GOI Install new 138kV switch, strain insulator replacement, string bus replacement, move PT7  
EPCOR 15-Jun-20 07:00 15-Jun-20 17:00 10 Hours
Continuous		 Summerside 1057LW Doble  
EPCOR 15-Jun-20 07:00 19-Jun-20 17:00 4.42 Days
Continuous		 Dome TX2 Zone Maintenance / Doble  
ATCO 15-Jun-20 07:00 19-Jun-20 17:30 4.44 Days
Continuous		 2075S 901T SVC TRANSFORMER MAINTENANCE @ NEWELL 2075S
901T Testing
SVC1 OUT OF SERVICE. SVC2 WILL STILL BE AVAILABLE		  
ALTALINK 15-Jun-20 07:00 19-Jun-20 18:00 4.46 Days
Continuous		 1044L (E805s - E816s) - GOI Outage required for crews working on parallel 909L and Alberta Transportation installing piles close to line for new overpass  
ATCO 15-Jun-20 08:00 19-Jun-20 17:00 4.38 Days
Continuous		 2029s ACF21 (2029s Heathfield) ACF21 CA-300 CT Upgrades, redundant filter banks in service, no system impact  
ATCO 15-Jun-20 09:30 15-Jun-20 16:30 7 Hours
Continuous		 7L73 Will be taking an entire line and station outage to 7L73, 829S and 750S mobile sub #1.  
ALTALINK 15-Jun-20 09:30 18-Jun-20 16:30 3.29 Days
Continuous		 510s2152 (ACF 21) - GOI Annual inspection & maintenance  
ATCO 15-Jun-20 09:30 19-Jun-20 16:00 4.27 Days
Continuous		 827S SVC perform testing on 703T, and other equipment.SVC will be offline  
ATCO 15-Jun-20 10:00 18-Jun-20 15:00 3.21 Days
Continuous		 7L40 XARM change out  
ATCO 15-Jun-20 10:00 28-Jun-20 16:00 13.25 Days
Continuous		 7L59 Cross- Arm change out  
ALTALINK 15-Jun-20 10:30 15-Jun-20 17:30 7 Hours
Continuous		 74s23.80 (23.80L) GOI 138kV break maintenance  
ALTALINK 15-Jun-20 12:00 19-Jun-20 14:00 4.08 Days
Continuous		 909L (310p - E665s) - GOI Components/Structure Replacements (Structures #1B - 214)  
EPCOR 16-Jun-20 07:00 16-Jun-20 17:00 10 Hours
Continuous		 Summerside 1058LW Doble  
ALTALINK 16-Jun-20 08:00 17-Jun-20 17:00 1.38 Days
Continuous		 378s152 & 378s252(848L) GOI Outage on 848L to implement/function sync check changes on M388/389 relays for 378s152 and 378s252.  
ALTALINK 16-Jun-20 09:00 16-Jun-20 16:00 7 Hours
Daily		 102s SVC De-Energize Replace 1 phase, 600V/230V TX for SVC cooling system. No isolation required, but SVC Cooling system will need to come offline, requiring a STOP command  
ATCO 16-Jun-20 09:00 16-Jun-20 17:00 8 Hours
Continuous		 790S 702, 7L22 790S 702 BREAKER SF6 HPL COMPLETE TESTING
7L22 OPEN-ENDED		  
ALTALINK 16-Jun-20 09:00 17-Jun-20 17:00 1.33 Days
Continuous		 190L (320P - 17s) - GOI 320p552 & 320p652 Low Gas maintenance. Adjust 320p5A.  
BCH 16-Jun-20 09:00 26-Jun-20 17:00 10.33 Days
Continuous		 2L293 (Nelway - Selkirk) structure replacement AB-BC
ATCO 17-Jun-20 09:00 19-Jun-20 16:00 2.29 Days
Continuous		 7L32 X-arm change out  
ALTALINK 17-Jun-20 13:30 17-Jun-20 18:30 5 Hours
Daily		 77s54 - GOI Test trips from 96/1752 (77s51) protection  
ATCO 18-Jun-20 09:00 18-Jun-20 17:00 8 Hours
Continuous		 7L50 For a Conductor Check  
ATCO 20-Jun-20 08:00 20-Jun-20 16:00 8 Hours
Continuous		 826S 904 To test new Breaker fail trips and block closes from new 50BF/701 to breaker 904  
ATCO 20-Jun-20 08:00 20-Jun-20 16:00 8 Hours
Continuous		 826S 908 To test new Breaker fail trips and block closes from new 50BF/701 to breaker 908  
ATCO 21-Jun-20 08:00 21-Jun-20 16:00 8 Hours
Continuous		 826S 903 Test the new Breaker Fail trips from new 50BF/704 protection relay on BKR 903  
ATCO 21-Jun-20 08:00 21-Jun-20 16:00 8 Hours
Continuous		 826S 907 Test the new Breaker Fail trips from new 50BF/704 protection relay on BKR 907  
ATCO 22-Jun-20 07:00 26-Jun-20 17:30 4.44 Days
Continuous		 2075S 902T SVC TRANSFORMER MAINTENANCE @ NEWELL 2075S
902T Testing
SVC2 OUT OF SERVICE. SVC1 WILL STILL BE AVAILABLE		  
ATCO 22-Jun-20 07:00 03-Jul-20 17:00 11.42 Days
Continuous		 2029s ACF13 (2029s Heathfield) PRC-005 trip coil testing  
ALTALINK 22-Jun-20 07:30 25-Jun-20 16:30 3.38 Days
Continuous		 511s2152 (ACF 21) - GOI Annual inspection & maintenance  
ATCO 22-Jun-20 08:00 05-Jul-20 16:00 13.33 Days
Continuous		 7L587 240/144kV Breaker Fail Protection
(OOS for duration of outages)
826S Marguerite P&C Upgrade		  
ALTALINK 22-Jun-20 09:00 25-Jun-20 18:00 3.38 Days
Continuous		 37s PT22 (905L) - GOI Replacing PT  
ATCO 22-Jun-20 09:00 26-Jun-20 16:00 4.29 Days
Continuous		 7L32 X-arm change out  
ALTALINK 22-Jun-20 09:00 24-Jul-20 18:00 32.38 Days
Continuous		 180L (255s - 928s) - GOI OPGW install for the Claresholm project. 180L ( Str range 1- 204  
ALTALINK 22-Jun-20 09:30 26-Jun-20 17:30 4.33 Days
Continuous		 63s2652 GOI 63s2652 PRC5 Breaker maintenance and 1st Trip, 1st Close, 2nd Trip.  
ATCO 22-Jun-20 10:00 25-Jun-20 15:00 3.21 Days
Continuous		 7L40 XARM change out  
ALTALINK 22-Jun-20 11:30 22-Jun-20 17:00 5.5 Hours
Daily		 796L (405s - 242s - 282s) - GOI 405s796 Center phase heater repair  
ALTALINK 22-Jun-20 12:30 24-Jun-20 17:30 2.21 Days
Continuous		 68s152 and T1 GOI Maintenance and Doble and 68s152 1st trip, 1st Close , 2nd Trip. also Maintenance on 68s152 and and gauge cover replacement.  
ALTALINK 23-Jun-20 08:00 23-Jun-20 17:00 9 Hours
Daily		 498s666 GOI Outage on 498s666 to implement/function sync check changes on M388/389 relay.  
ALTALINK 23-Jun-20 08:00 23-Jun-20 17:30 9.5 Hours
Daily		 103s352 GOI top up gas.  
ATCO 23-Jun-20 08:00 25-Jun-20 17:00 2.38 Days
Continuous		 848S 901T 901T Oil Reclaiming at 848S Ruth Lake  
ATCO 23-Jun-20 08:00 17-Jul-20 17:00 24.38 Days
Continuous		 757S 912T, 9L80 Add 59N Protection to 912T Tertiary Winding, 9L80 will be out of service  
ALTALINK 23-Jun-20 09:00 24-Jun-20 14:00 29 Hours
Continuous		 320p1352 (1045AL) GOI 320p1352 sync check modifications. Recommissioning circuits for proper functionality.  
ALTALINK 24-Jun-20 08:00 24-Jun-20 17:30 9.5 Hours
Daily		 103s252 GOI top up gas.  
ALTALINK 24-Jun-20 08:00 25-Jun-20 17:00 1.38 Days
Continuous		 132s12 & 132s15(1053L) GOI Outage on 1053L to implement/function sync check changes on M388/389 relays for 132s12 breaker.  
ALTALINK 24-Jun-20 08:00 27-Jun-20 17:00 3.38 Days
Continuous		 913L (69s-913L142A-338s) - GOI Line Clearance Mitigation. Scope of work includes adjusting sag between structures 58B and 63  
ALTALINK 24-Jun-20 08:30 24-Jun-20 15:30 7 Hours
Daily		 632s PS1(TX18793) GOI test the transformer controller  
ENMAX 25-Jun-20 08:00 25-Jun-20 12:00 4 Hours
Continuous		 693L. 10.2TR. 10PT138-Z31 Substation Washing  
ALTALINK 25-Jun-20 08:00 25-Jun-20 17:30 9.5 Hours
Daily		 103s652 GOI top up gas.  
ALTALINK 25-Jun-20 08:30 25-Jun-20 17:00 8.5 Hours
Daily		 39s1052 GOI 39s1052 Breaker maintenance and 1st trip, 1st Close, 2nd Trip.  
ENMAX 25-Jun-20 12:00 25-Jun-20 18:00 6 Hours
Continuous		 832L. 10.1TR. 10PT138-Z31 Substation Washing  
EPCOR 26-Jun-20 07:00 06-Jul-20 17:00 10.42 Days
Continuous		 1059L Line Maintenance  
EPCOR 27-Jun-20 07:00 28-Jun-20 17:00 1.42 Days
Continuous		 240CV5, and Vic TX5 @ Victoria & Castledowns Doble 250CV5 CVVT/CT's zone at Castledowns, and Low side CVT's of TX5 at Victoria. VDS21 Repair.  
ALTALINK 29-Jun-20 07:00 01-Jul-20 17:00 2.42 Days
Continuous		 913L (69s-913L142A-A732s) - GOI Scope of work includes replacing structure 142F  
ENMAX 29-Jun-20 08:00 30-Jun-20 18:00 1.42 Days
Continuous		 1080L. Power factor test HV LA 25MD240-1080. LA 65MD240-1080. Replace switch mech 25SW146, 25SW147, 65SW133, 65SW134. Install switch shrouds  
ALTALINK 29-Jun-20 08:00 03-Jul-20 16:30 4.35 Days
Continuous		 511s2252 (ACF22) GOI Annual Filter Bank outage, maintenance, inspection. All Other AC Filters to remain in-service and available for Link power transfer requirements  
ATCO 30-Jun-20 08:00 30-Jun-20 16:00 8 Hours
Continuous		 7L69 Pole relocate for Customer  
ALTALINK 30-Jun-20 09:00 30-Jun-20 17:00 8 Hours
Daily		 263s870E (870L) GOI 138kV breaker maintenance and 1st Trip, 1st Close, 2nd Trip  
ENMAX 02-Jul-20 08:00 02-Jul-20 18:00 10 Hours
Continuous		 985L. Power factor test HV LA 25MD240-985. replace switch mech. SW133, SW134  
ATCO 02-Jul-20 09:30 02-Jul-20 17:00 7.5 Hours
Continuous		 811S 710, 7L32 811S 710 BREAKER SF6 HPL PARTIAL TESTING  
EPCOR 06-Jul-20 07:00 06-Jul-20 17:00 10 Hours
Continuous		 Castledowns TX1 Maintenance / Doble  
ATCO 06-Jul-20 07:00 17-Jul-20 17:30 11.44 Days
Continuous		 13L50 (DC LINK) 2075S - NEWELL EATL OUTAGE

2020 EATL Outage:

T11 Testing		  
ALTALINK 06-Jul-20 07:30 10-Jul-20 16:30 4.38 Days
Continuous		 511s1352 (ACF12) GOI Annual Filter Bank outage, maintenance, inspection. All Other AC Filters to remain in-service and available for Link power transfer requirements  
ENMAX 06-Jul-20 08:00 06-Jul-20 16:00 8 Hours
Continuous		 162B240-RB136 HV Breaker maintenance 162B240-RB136. Dashpot checks. SF6 sample  
ENMAX 06-Jul-20 08:00 21-Jul-20 18:00 15.42 Days
Continuous		 36.81L. Haskayne line raise project. Raising the line and replacing 4 structures to accommodate a new road construction.  
ATCO 06-Jul-20 08:00 30-Aug-20 16:00 55.33 Days
Continuous		 826S 902T 826S Marguerite P&C 240/144kV Breaker Fail Protection Upgrade  
BCH 06-Jul-20 09:00 08-Jul-20 17:00 2.33 Days
Continuous		 5L51 (Custer - Ingledow) disconnect maintenance AB-BC
ATCO 06-Jul-20 10:00 13-Jul-20 15:00 7.21 Days
Continuous		 7L40 XARM change out  
ATCO 06-Jul-20 11:00 11-Jul-20 16:00 5.21 Days
Continuous		 898S 902T, 789L, 788L, 898S 501R Isolate 902T, 704, 708, 501 and test  
ALTALINK 06-Jul-20 12:30 06-Jul-20 14:30 2 Hours
Daily		 613L(396s - 103s) GOI Connect Mobile on 613L  
EPCOR 07-Jul-20 07:00 16-Jul-20 17:00 9.42 Days
Continuous		 1058L Line Maintenance  
ENMAX 07-Jul-20 08:00 07-Jul-20 16:00 8 Hours
Continuous		 162B240-RB132 HV Breaker maintenance 162B240-RB132. Dashpot checks. SF6 sample.  
ATCO 07-Jul-20 08:00 07-Jul-20 17:00 9 Hours
Continuous		 898S 901 Isolate and test breaker, 9L22 Open ended as Breaker 902 will also be open under 2-51473  
ATCO 07-Jul-20 08:00 07-Jul-20 17:00 9 Hours
Continuous		 898S 902, 9L22 Isolate and test breaker, 9L22 Open ended as Breaker 901 will also be open under 2-51472  
ATCO 07-Jul-20 08:00 08-Jul-20 17:00 1.38 Days
Continuous		 7L59 FAC-008 intolerable span violation mitigation
STR 5A require GOI to be changed		  
ALTALINK 07-Jul-20 08:00 10-Jul-20 17:00 3.38 Days
Continuous		 396s 138kV bus, T1 GOI (412L) GOI 138kv bus outage required to change qty of 24 string insulators on bus. String insulators to be replaced on 412L entering station. Mobile substation required to maintain Fortis loads during outage duration AB-BC
ENMAX 08-Jul-20 08:00 08-Jul-20 16:00 8 Hours
Continuous		 162B240-RB133 HV Breaker maintenance 162B240-RB133. Dashpot checks  
ENMAX 09-Jul-20 08:00 09-Jul-20 16:00 8 Hours
Continuous		 162B240-RB135 HV Breaker maintenance 162B240-RB135. SF6 sample  
ATCO 09-Jul-20 08:00 09-Jul-20 17:00 9 Hours
Continuous		 898S 903 898S - 903 BREAKER SF6 HPL COMPLETE TESTING - 9L47 Open ended as Breaker 902 will also be open under 2-52180
Isolate and test breaker		  
ATCO 09-Jul-20 08:00 09-Jul-20 17:00 9 Hours
Continuous		 898S 902, 9L47 Isolate and test breaker, 9L47 Open ended as Breaker 903 will also be open under 2-51478  
ATCO 09-Jul-20 10:00 19-Jul-20 16:00 10.25 Days
Continuous		 7L59 Cross- Arm change out  
ENMAX 10-Jul-20 08:00 10-Jul-20 16:00 8 Hours
Continuous		 162B240-RB134 HV Breaker maintenance 162B240-RB134. Dashpot checks  
ALTALINK 10-Jul-20 15:00 10-Jul-20 19:00 4 Hours
Daily		 613L(396s - 103s) GOI Disconnect Mobile from 613L  
ATCO 12-Jul-20 08:00 12-Jul-20 10:00 2 Hours
Continuous		 898S 904 PRC-005 - TRIP COIL TESTING - BREAKER 904-A @ 898S
Isolate Breaker test trip coils

Breaker 904 will be out of service for the duration of work		  
ATCO 12-Jul-20 10:00 12-Jul-20 12:00 2 Hours
Continuous		 898S 905 PRC-005 - TRIP COIL TESTING - BREAKER 905-A @ 898S
Isolate Breaker test trip coils

Breaker 905 will be out of service for the duration of work		  
ATCO 12-Jul-20 12:00 12-Jul-20 14:00 2 Hours
Continuous		 898S 906 PRC-005 Test 906 Trip Coil(s), only one breaker tested at a time, approximate testing time per breaker = 2 hours  
ATCO 12-Jul-20 14:00 12-Jul-20 16:00 2 Hours
Continuous		 898S 908 PRC-005 Test 908 Trip Coil(s), only one breaker tested at a time, approximate testing time per breaker = 2 hours  
ATCO 12-Jul-20 16:00 12-Jul-20 18:00 2 Hours
Continuous		 898S 909 PRC-005 Test 909 Trip Coil(s), only one breaker tested at a time, approximate testing time per breaker = 2 hours  
EPCOR 13-Jul-20 07:00 17-Jul-20 17:00 4.42 Days
Continuous		 Genesee 1202 Doble  
ALTALINK 13-Jul-20 07:15 17-Jul-20 17:45 4.44 Days
Continuous		 887L/1L274 (48s - BCK) GOI (1) Maintenance Strs 12, 44 (2) Replace Strs 53, 56, 57, 58 AB-BC
ALTALINK 13-Jul-20 07:30 16-Jul-20 16:30 3.38 Days
Continuous		 511s ACF13 GOI Annual Filter Bank outage, maintenance, inspection. All Other AC Filters to remain in-service and available for Link power transfer requirements  
ENMAX 13-Jul-20 08:00 13-Jul-20 16:00 8 Hours
Continuous		 162B240-RB131 HV Breaker maintenance 162B240-RB131. Dashpot checks.  
ATCO 13-Jul-20 08:00 17-Jul-20 17:00 4.38 Days
Continuous		 826S 908 Top up Dashpot Oil, Complete Testing  
BCH 13-Jul-20 09:00 16-Jul-20 17:00 3.33 Days
Continuous		 2L113 (B1s Natal - B2s Cranbrook) disconnect maintenance AB-BC
ALTALINK 13-Jul-20 09:30 16-Jul-20 16:30 3.29 Days
Continuous		 510s1452 (ACF 14) - GOI Annual inspection & maintenance  
EPCOR 15-Jul-20 07:00 21-Jul-20 17:00 6.42 Days
Continuous		 1045L ( E805S - 310P - 320P ) Line Maintenance  
ATCO 15-Jul-20 09:30 15-Jul-20 17:00 7.5 Hours
Continuous		 741S 702, 7L199 741S Breaker 702 PRC-005 - Trip Coil Testing - 7L199 Open Ended  
BCH 20-Jul-20 08:30 23-Jul-20 16:00 3.31 Days
Continuous		 2L112 (Boundary - Nelway) bpa outage/BCH disconnect maintenance AB-BC
ATCO 20-Jul-20 09:00 21-Jul-20 17:00 1.33 Days
Continuous		 722S 702, 7L84 BREAKER MIN OIL HLR COMPLETE TESTING

PRC- 005 relays, trip coils aux coils, complete main.		  
ATCO 20-Jul-20 10:00 27-Jul-20 15:00 7.21 Days
Continuous		 7L40 XARM change out  
BCH 21-Jul-20 09:00 23-Jul-20 09:00 2 Days
Continuous		 1L275 (799s Coleman - Natal) markerball installation AB-BC
EPCOR 22-Jul-20 07:00 26-Jul-20 17:00 4.42 Days
Continuous		 1098L ( E805S - Poundmaker ) Line Maintenance  
ENMAX 22-Jul-20 08:00 22-Jul-20 16:00 8 Hours
Continuous		 21.80L HV Breaker maintenance. 21B138-21.80  
ENMAX 22-Jul-20 08:00 25-Jul-20 16:00 3.33 Days
Continuous		 21.80L Move double structures on Sarcee Trail.  
ATCO 22-Jul-20 10:00 23-Jul-20 17:00 31 Hours
Continuous		 722S 701, 7L39 (811s Clairmont Lake - 7L39 tap) 722S 701 BREAKER MIN OIL HLD COMPLETE TESTING
Breaker complete testing, PRC005 aux relays, trip coils relay testing		  
EPCOR 26-Jul-20 07:00 04-Aug-20 17:00 9.42 Days
Continuous		 Dome S/S 909L-E bay Doble, Cutover, commissioning and energization of new S/S expansion for 72 kV upgrade  
EPCOR 27-Jul-20 07:00 31-Jul-20 17:00 4.42 Days
Continuous		 Jasper TX1 Doble  
ATCO 27-Jul-20 08:00 30-Jul-20 17:00 3.38 Days
Continuous		 7L24 Replacing Cross-Arms, Poles and Ground Rod's  
BCH 27-Jul-20 09:00 07-Aug-20 17:00 11.33 Days
Continuous		 2L294 (A.A. Lambert - Cranbrook) structure replacement & disconnect maintenance AB-BC
ATCO 27-Jul-20 10:00 09-Aug-20 16:00 13.25 Days
Continuous		 7L59 Cross- Arm change out  
ALTALINK 28-Jul-20 07:00 29-Jul-20 18:00 1.46 Days
Continuous		 170(799s - 632s) GOI P5 170L24 Urgent Repair.  
EPCOR 28-Jul-20 07:00 04-Aug-20 17:00 7.42 Days
Continuous		 909L ( E665S - 89S ) Line Maintenance  
ALTALINK 30-Jul-20 07:00 30-Jul-20 18:00 11 Hours
Daily		 863L(618s-863L162A) GOI Asset Management as requested Insulator Bells Resistance testing on 863L Root Cause Investigation Structures Range 79-159.  
ENMAX 31-Jul-20 08:00 31-Jul-20 18:00 10 Hours
Continuous		 1003L Power factor test HV LA 25MD240-1003. Replace switch mech SW140, SW141  
ATCO 03-Aug-20 07:00 03-Nov-20 17:00 92.46 Days
Continuous		 972S 905B Halkirk 2 Windfarm Project  
EPCOR 04-Aug-20 07:00 04-Aug-20 17:00 10 Hours
Continuous		 C2404 Doble  
ALTALINK 04-Aug-20 07:30 04-Aug-20 17:30 10 Hours
Daily		 138s603 Advice for customer 138 kV switch maintenance by customer  
ATCO 04-Aug-20 08:00 06-Aug-20 17:00 2.38 Days
Continuous		 7L24 Replacing Cross-Arms, Poles and Ground Rod's  
ENMAX 04-Aug-20 08:00 04-Sep-20 16:00 31.33 Days
Continuous		 24.83L GT68 Transmission Line Relocate. Phasing required on return  
ALTALINK 04-Aug-20 09:00 07-Aug-20 18:00 3.38 Days
Continuous		 786L/1L275 (799s - Natal) GOI P5 786L Urgent Repair Str's Range 76-117. AB-BC
EPCOR 05-Aug-20 07:00 10-Aug-20 17:00 5.42 Days
Continuous		 909L ( E665S - 310P ) Line Maintenance  
ATCO 08-Aug-20 18:00 10-Aug-20 17:00 1.96 Days
Continuous		 847S 902T CNRL Albian Sands - Request for a Condition guarantee from ATCO to isolate 902T  
EPCOR 10-Aug-20 07:00 13-Aug-20 17:00 3.42 Days
Continuous		 Castle Downs S/S Tx2 Outage Outage required for protection upgrade project  
EPCOR 10-Aug-20 07:00 14-Aug-20 17:00 4.42 Days
Continuous		 Lambton TX1 Doble / SFRA  
EPCOR 10-Aug-20 07:00 21-Aug-20 17:00 11.42 Days
Continuous		 TX3 @ Jasper DGA monitor  
ALTALINK 10-Aug-20 07:15 13-Aug-20 17:45 3.44 Days
Continuous		 914L (87s - 63s) Advice SCADA upgrade  
ATCO 10-Aug-20 08:00 13-Aug-20 17:00 3.38 Days
Continuous		 7L24 Replacing Cross-Arms, Poles and Ground Rod's  
ALTALINK 10-Aug-20 09:00 14-Aug-20 18:00 4.38 Days
Continuous		 786L/1L275 (799s - Natal) GOI P5 786L Urgent Repair Str's Range 76-117. AB-BC
ATCO 11-Aug-20 11:00 14-Aug-20 17:00 3.25 Days
Continuous		 847S 901T CNRL Albian Sands - Request for a Condition guarantee from ATCO to isolate 902T  
EPCOR 17-Aug-20 07:00 20-Aug-20 17:00 3.42 Days
Continuous		 Castle Downs S/S Tx1 Outage Outage required for protection upgrade project  
EPCOR 17-Aug-20 07:00 21-Aug-20 17:00 4.42 Days
Continuous		 Lambton Tx2 Doble/ SFRA  
EPCOR 17-Aug-20 07:00 21-Aug-20 17:00 4.42 Days
Continuous		 Jasper TX3 Doble  
ATCO 17-Aug-20 07:00 28-Aug-20 17:00 11.42 Days
Continuous		 2029S ACF14 PRC-005 - TRIP COIL TESTING - BREAKER 1221-A @ 2029S

BREAKER 1221 (10BF14) @ 2029S

Filter will be unavailable, One device worked on at a time

Depending on power transfer level, reduce voltage mode will be activated.		  
ALTALINK 17-Aug-20 07:15 20-Aug-20 17:45 3.44 Days
Continuous		 914L (87s - 86s) Advice SCADA upgrade  
ATCO 17-Aug-20 08:00 20-Aug-20 17:00 3.38 Days
Continuous		 7L24 Replacing Cross-Arms, Poles and Ground Rod's  
ALTALINK 17-Aug-20 09:00 21-Aug-20 18:00 4.38 Days
Continuous		 786L/1L275 (799s - Natal) GOI P5 786L Urgent Repair Str's Range 76-117. AB-BC
ATCO 17-Aug-20 10:00 30-Aug-20 16:00 13.25 Days
Continuous		 7L59 Cross- Arm change out  
EPCOR 24-Aug-20 07:00 25-Aug-20 17:00 1.42 Days
Continuous		 Castle Downs S/S Tx2 Outage Outage required for protection upgrade project  
EPCOR 24-Aug-20 07:00 28-Aug-20 17:00 4.42 Days
Continuous		 Dome TX1 Maintenance / Doble  
ALTALINK 24-Aug-20 08:00 03-Sep-20 18:00 10.42 Days
Continuous		 1325L (510s - 511s) - GOI Annual inspection & maintenance  
ALTALINK 24-Aug-20 09:00 24-Aug-20 18:00 9 Hours
Daily		 17s 240kV SBus 2 - GOI Bus outage to remove 906L Dead End from Switch and Lattice Structure. Line Crew will tie this back to the lattice for switch replacement  
ATCO 24-Aug-20 09:00 27-Aug-20 16:00 3.29 Days
Continuous		 755S 903 Repair leaks on Breaker, require manufacturer representative on site.

Ring bus will be opened		  
ALTALINK 24-Aug-20 09:30 28-Aug-20 17:00 4.31 Days
Continuous		 906L (17s-42s) - GOI Replace 17s906X Underhung Switch. Like For Like  
ALTALINK 25-Aug-20 08:00 27-Aug-20 17:30 2.4 Days
Continuous		 370s T6(TX18509) GOI maintenance, doble  
ALTALINK 25-Aug-20 08:00 28-Aug-20 17:00 3.38 Days
Continuous		 202L (62s-61s) - GOI Fire Mitigation / Maintenance on Strs 137, 138, 139, 141, 156 and 163  
ALTALINK 28-Aug-20 09:00 28-Aug-20 17:00 8 Hours
Daily		 17s 240kV SBus 2 - GOI Bus outage to transfer 906L slack span from Lattice Structure to new 906X switch. Line Crew will be completing the work.  
EPCOR 31-Aug-20 07:00 31-Aug-20 17:00 10 Hours
Continuous		 Petrolia 1164L Doble  
ATCO 31-Aug-20 08:00 14-Sep-20 12:00 14.17 Days
Continuous		 731S 701T, 7L03 731S Elmworth Bkr Replacement and Protection Upgrade

Outgae on 701T/7L03 (Isolation points - 501VRA, 501VRB,
501VRX, 700D1, 7L03D4, TBD for mobile sub on 25 kV bus)		  
ATCO 31-Aug-20 08:00 25-Oct-20 16:00 55.33 Days
Continuous		 826S 901T 240/144kV Breaker Fail Protection
(901T OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ALTALINK 01-Sep-20 09:00 01-Sep-20 17:00 8 Hours
Daily		 17s 240kV SBus 2 - GOI Bus outage to remove 1081L Dead End from Switch and Lattice Structure. Line Crew will tie this back to the lattice for switch replacement  
BCH 01-Sep-20 09:00 03-Sep-20 17:00 2.33 Days
Continuous		 Natal T1 (BCH Natal) disconnect maintenance AB-BC
ALTALINK 01-Sep-20 09:00 09-Sep-20 17:00 8.33 Days
Continuous		 1081L (17s-281s) - GOI Replace 17s1081 Underhung Switch and MOD, 17s23 switch, 17s32 switch  
ENMAX 02-Sep-20 08:00 10-Sep-20 12:00 8.17 Days
Continuous		 162.1TR Online Monitoring Installation. Install a new tap changer controller (DEV 90) and test/commission.  
ATCO 07-Sep-20 08:00 07-Sep-20 17:00 9 Hours
Continuous		 939S 903T, 939S 900BS2, 939S 900BS3, 9L10 Livock Pile Heaving Project -
Connect bypass to 900BS3 and 900BS2
Create open jumper J1 between 900BS3 and 900D1
Update relay settings too		  
ATCO 07-Sep-20 16:00 14-Oct-20 17:00 37.04 Days
Continuous		 939S 900BS1, 939S 700BS1, 939S 901T Livock Pile Heaving Project - Outage on 901T, 900BS1, and 700BS1  
ALTALINK 09-Sep-20 09:00 09-Sep-20 17:00 8 Hours
Daily		 17s 240kV SBus 2 - GOI . Bus outage to transfer 1081L slack span from Lattice Structure to new 1081 switch. Line Crew will be completing the work.  
ENMAX 10-Sep-20 12:00 16-Sep-20 16:00 6.17 Days
Continuous		 162.2TR (ENMAX 162 Beddington) Online Monitoring Installation. Install a new tap changer controller (DEV 90) and test/commission.  
EPCOR 14-Sep-20 07:00 25-Sep-20 17:00 11.42 Days
Continuous		 CV5 @ Castledowns & Victoria maint and splice repair  
ALTALINK, ATCO 14-Sep-20 08:00 25-Sep-20 17:00 11.38 Days
Continuous		 830L (562s Cypress - 840s McNeill Station), 840S McNeill Station 840S McNeill Fall 2020 Outage

PRC-005 Maintenance		 AB-SK
ALTALINK 14-Sep-20 09:00 16-Sep-20 16:00 2.29 Days
Continuous		 2s T1 (Tx18633) / 87L GOI 138kV VT Replacement  
SUNCOR 14-Sep-20 09:00 20-Sep-20 18:00 6.38 Days
Continuous		 29EDD-1 5yr and 10 yr maintenance on 29CTT-1 in 29EDD-1

Elements not available:
29CVT-1, 29PL9-2		  
ALTALINK 14-Sep-20 09:00 24-Sep-20 18:00 10.38 Days
Continuous		 1201L (520s Bennett - BCH Cranbrook) Structure range 187-508 Component's and Fire Mitigation( 95050674) AB-BC
BCH 14-Sep-20 09:00 25-Sep-20 17:00 11.33 Days
Continuous		 5L91 (Ashton Creek - Selkirk) insulator replacement AB-BC
ALTALINK 14-Sep-20 09:30 18-Sep-20 17:00 4.31 Days
Continuous		 17s 240kV SBus 2 - GOI Replace 240B2 (south bus) strain insulators, replace 1ph bus CVT  
ALTALINK 15-Sep-20 08:30 16-Sep-20 17:00 1.35 Days
Continuous		 172s 709L & T1 - GOI 172s T1 Bushings, 172sT1 doble, Breaker maintenance on s71 , 172sT1 Top Oil Gauge Req Replacement  
ATCO 15-Sep-20 12:01 28-Sep-20 16:00 13.17 Days
Continuous		 7L69 731S Elmworth Bkr Replacement and Protection Upgrade

Outage on 7L69		  
ENMAX 17-Sep-20 08:00 23-Sep-20 12:00 6.17 Days
Continuous		 65.1TR Online Monitoring Installation.  
EPCOR 21-Sep-20 07:00 25-Sep-20 17:00 4.42 Days
Continuous		 1044L east @ Jasper - Petrolia Vt Replacement  
ALTALINK 21-Sep-20 07:30 02-Oct-20 18:00 11.44 Days
Continuous		 71s T1 (Tx 18357) - GOI Crews will be replacing the HV & LV bushings; some minor maintenance work will also be completed if time exists  
ALTALINK 21-Sep-20 09:30 01-Oct-20 14:00 10.19 Days
Continuous		 17s13 - GOI Replace 17s13 Breaker To New SF6 Type  
ENMAX 23-Sep-20 12:00 29-Sep-20 16:00 6.17 Days
Continuous		 65.2TR Online Monitoring Installation.  
ALTALINK 28-Sep-20 06:15 16-Oct-20 17:45 18.48 Days
Continuous		 777L (48s - 245s) GOI Maintenance and Structure replacements (Str 15 - 226) AB-BC
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		  
EPCOR 28-Sep-20 07:00 31-Dec-20 17:00 94.46 Days
Continuous		 Bellamy Tx1 Bellamy TX1 regasketing work  
ALTALINK 28-Sep-20 07:30 01-Oct-20 17:30 3.42 Days
Continuous		 87s T1(TX18511) Advice SCADA upgrade  
SUNCOR 28-Sep-20 08:00 05-Oct-20 18:00 7.42 Days
Continuous		 29EDD-56 PL9-15 OUTAGE 5YR SYSTEM PM, 29PT-190 AND BREAKER 652-4110:
29EDD-56;29PT-190 SYSTEM;PM 5y,
29EDD-56;652-4110 MAINT & TEST;PM 10y,
Repair OHSW bonds to towers PL9-14/15
29EDD-56 Repair Leak 29PT-190		  
BCH 28-Sep-20 09:00 30-Sep-20 17:00 2.33 Days
Continuous		 5L92 (Cranbrook - Selkirk) annual plan request F19 AB-BC
ALTALINK 28-Sep-20 09:00 02-Oct-20 18:00 4.38 Days
Continuous		 1201L (520s Bennett - BCH Cranbrook) Structure range 187-508 Component's and Fire Mitigation( 95050674) AB-BC
ALTALINK 01-Oct-20 12:30 04-Oct-20 17:00 3.19 Days
Continuous		 368s BUS 2, 722L (107s – 368s) & 107s St Replace 138kV PT's 368s25  
ALTALINK 01-Oct-20 14:30 01-Oct-20 16:30 2 Hours
Daily		 995L (17s995N) - ADVICE 1.5 Hour outage to 995L (Open at 17s) is required in order to test energize new 17s13 Breaker via 17s12. ACC Issue 17s995N Advice then open 17s12 to Commission New 17s13  
ALTALINK 05-Oct-20 07:30 08-Oct-20 17:30 3.42 Days
Continuous		 87s T2(TX18339) Advice SCADA upgrade  
ENMAX 05-Oct-20 08:00 18-Oct-20 18:00 13.42 Days
Continuous		 7.82L. WCRR 101 Street Project  
SUNCOR 06-Oct-20 08:00 15-Oct-20 18:00 9.42 Days
Continuous		 29EDD-56 PL6-29 OUTAGE 5YR SYSTEM PM, BUSS 29PP-41E BREAKERS 652-4140:
29EDD-56;29PP-41D & 41E SYSTEM;PM 5y,
29EDD-56;652-4140 MAINT & TEST;PM 10y		  
ENMAX 09-Oct-20 08:00 12-Oct-20 16:00 3.33 Days
Continuous		 162s PT-Z41. 1-GSU-XF-0001 Replace 87-XF1 B differential protection. Commission checks and trip testing  
ENMAX 09-Oct-20 08:00 12-Oct-20 16:00 3.33 Days
Continuous		 162s. 1-GSU HV SW maint SW133, SW132. Replace switch mech. SW132, SW133  
ALTALINK 12-Oct-20 07:30 15-Oct-20 17:30 3.42 Days
Continuous		 87s2352 Advice SCADA upgrade  
EPCOR 13-Oct-20 07:00 23-Oct-20 17:00 10.42 Days
Continuous		 TX1 @ Petrolia DGA Install  
ATCO 15-Oct-20 08:00 15-Oct-20 17:00 9 Hours
Continuous		 939S 903T, 939S 900BS2, 939S 900BS3, 9L10 Livock Pile Heaving Project
Close jumper and Disconnect Bypass		  
BCH 19-Oct-20 09:00 30-Oct-20 09:00 11 Days
Continuous		 1L274 (B1s BCH Natal - 1D1L274) structure refurbishment AB-BC
ATCO 26-Oct-20 07:00 06-Nov-20 17:30 11.48 Days
Continuous		 13L50 (DC LINK) 2075S - NEWELL EATL OUTAGE

2020 EATL Outage:

Inspections

IR Camera Installs

nLFL Testing

Expansion Tank Sensor Replacement		  
ALTALINK 26-Oct-20 08:00 29-Oct-20 18:00 3.42 Days
Continuous		 77s T2, 240/138kV East Bus - GOI Replace 77s38. Replace 240kV East Bus Protection  
ATCO 26-Oct-20 08:00 08-Nov-20 16:00 13.38 Days
Continuous		 9L36 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ALTALINK 02-Nov-20 06:00 06-Nov-20 18:30 4.52 Days
Continuous		 285s T2, T2X, & 25kV South Bus - GOI Replaceme T2 with T2X. Install new SSTX. Cut over feeders to new switchgear building.  
EPCOR 02-Nov-20 07:00 03-Nov-20 17:00 1.42 Days
Continuous		 Castle Downs S/S Tx1 Outage Outage required for protection upgrade project  
EPCOR 02-Nov-20 07:00 03-Nov-20 17:00 1.42 Days
Continuous		 Castle Downs S/S Tx1 Outage 15 kV Protection Upgrade Project  
EPCOR 05-Nov-20 07:00 06-Nov-20 17:00 1.42 Days
Continuous		 Castle Downs S/S Tx2 Outage 15kV Protection Upgrade Project  
ATCO 09-Nov-20 08:00 23-Nov-20 16:00 14.33 Days
Continuous		 9L37 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ALTALINK 09-Nov-20 09:30 12-Nov-20 17:30 3.33 Days
Continuous		 919L (77S - 310P) - GOI Replace 77s16 CVTs. Replace strain insulators on 919L at 77s.  
ALTALINK 16-Nov-20 06:30 16-Nov-20 18:00 11.5 Hours
Daily		 285s 138kV South Bus - GOI Remove 285s91  
BCH 16-Nov-20 09:00 18-Dec-20 09:40 32.03 Days
Continuous		 1L274 (B1s BCH Natal - 1D1L274) structure refurbishment AB-BC
ALTALINK 16-Nov-20 09:30 19-Nov-20 17:30 3.33 Days
Continuous		 989L (77S - 310P) - GOI Replace 77s31 CVTs  
ATCO 05-Dec-20 07:00 11-Dec-20 16:00 6.38 Days
Continuous		 9L59 Outage for Garden Plain Wind Project  
ATCO 15-Dec-20 07:00 23-Dec-20 17:00 8.42 Days
Continuous		 730S 702, 730S 704 SVC addition and 144 kv bus rebuild.  
ATCO 04-Jan-21 08:00 09-Jan-21 16:00 5.33 Days
Continuous		 7L07 790S Poplar Hill Protection & SCADA Upgrade

Outage on 7L07		  
ATCO 05-Jan-21 08:00 08-Jan-21 16:00 3.33 Days
Continuous		 9L20 56772 Nevis Transformer Addition
9L20 Open -ended		  
ATCO 09-Jan-21 08:00 12-Jan-21 16:00 3.33 Days
Continuous		 9L912 56772 Nevis Transformer Addition
9L912 Open -ended		  
ATCO 16-Jan-21 08:00 23-Jan-21 16:00 7.33 Days
Continuous		 7L22 790S Poplar Hill Protection & SCADA Upgrade

Outage on 7L22		  
ATCO 20-Jan-21 08:00 23-Feb-21 16:00 34.33 Days
Continuous		 951S 900BS2, 951S 908, 951S 906, 951S 903 951S construction for 9L162 & 9L193 addition
AESO should be notified of any changes to below workplan:

Jan 20, 2021 – Feb 20, 2021
Isolation pts: 908B,909A
Impact: BKR 908 OOS
Scope of work: Demo bus & install 909A & 909B
Feb 21, 2021 – Feb 23, 2021
Expand to isolation pts:903B, 906B,908B
Impact: BKR 903,BKR 906, 900BS2 OOS
Scope of work: Make connections to 909A & 912A		  
ATCO 25-Jan-21 08:00 26-Jan-21 16:00 1.33 Days
Continuous		 766S 901T, 9L20, 9L912 56772 Nevis Transformer Addition
Tie-in to the new bus for 902T
901T OOS
9L20 OPEN-ENDED
9L912 OPEN-ENDED		  
ATCO 03-Feb-21 07:00 07-Feb-21 17:00 4.42 Days
Continuous		 9L101 Line move for mine expansion.
Attach new line to existing 9L101		  
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 22-Feb-21 08:00 22-Feb-21 18:00 10 Hours
Continuous		 7L65, 7L77 String over 7L65 and 7L77  
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
Connect 910A to 900BS1
Impact: 900BS1 OOS, BKR 901 OOS, BKR 904 OOS, BKR 907 OOS, 920C OOS		  
ATCO 01-Mar-21 07:00 02-Mar-21 17:00 1.42 Days
Continuous		 972S 900BS2, 9L16 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  
ATCO 23-Apr-21 08:00 26-Apr-21 16:00 3.33 Days
Continuous		 766S 901T Complete CT, PT, P&C cutover, commission
relays and DTT to 770S Three Hills (option 1) or 1-114S
Ghost Pine (option 2)		  
ATCO 27-Apr-21 08:00 30-Apr-21 16:00 3.33 Days
Continuous		 766S 901T Complete P&C cutover, commission relays
and DTT receive from 766S Nevis		  
ATCO 04-May-21 08:00 17-May-21 17:00 13.38 Days
Continuous		 9L02 Louise Creek Rebuild project
Wiring for 903/910BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF protections.		  
ATCO 24-May-21 08:00 06-Jun-21 17:00 13.38 Days
Continuous		 9L40 Louise Creek Rebuild project
Wiring for 903/904BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF protections.		  
ATCO 14-Jun-21 08:00 27-Jun-21 17:00 13.38 Days
Continuous		 9L05 Louise Creek Rebuild project
Wiring for 904/905BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ATCO 29-Jun-21 08:00 29-Jun-21 16:00 8 Hours
Continuous		 7LA53 Install new 7LA53 deadend for prepping New Line Addition 7L208  
ATCO 30-Jun-21 08:00 14-Jul-21 16:00 14.33 Days
Continuous		 969S 700 BUS Install and connect mobile sub
Connect temp 4160 supply
Restore power through Mobile Sub
Complete installation and commissioning of 702 bay		  
ATCO 05-Jul-21 08:00 18-Jul-21 17:00 13.38 Days
Continuous		 9L939 Louise Creek Rebuild project
Wiring for 905/906BF relays.
CT ratio changes.
Relay programming.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ATCO 26-Jul-21 08:00 28-Sep-21 17:00 64.38 Days
Continuous		 809S 902T, 9L938 Louise Creek Rebuild project
Replace breakers' 911, 912, and 707.
Add new bus PT 700PT2.
Complete wiring for BF, 21A, 21B, and 701C relays.
CT ratio changes.
Commission apparatus.
Relay programming.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ATCO 29-Jul-21 08:00 05-Aug-21 17:00 7.38 Days
Continuous		 7L91 P&C wiring and commissioning associated to 7L208 work  
ATCO 02-Sep-21 08:00 03-Sep-21 16:00 1.33 Days
Continuous		 733S 702T, 733S 144kV Bus 733S Simonette Expansion -Connect New Cap Bank
MD Greenview Pod		  
ATCO 04-Oct-21 08:00 17-Oct-21 17:00 13.38 Days
Continuous		 809S 901T Louise Creek Rebuild project
Switch station service to alternate.
Replace bus PT 900PT1.
Complete wiring for BF, 87TA, 87TB, and 51NGR relays.
CT ratio changes.
Commission apparatus.
Relay programming.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ATCO 14-Dec-21 08:00 21-Dec-21 15:00 7.29 Days
Continuous		 7L40 53455 MD Greenview Load Project
Install and commission new 144kV switches 7L40D? and 7L40D? at T-tap location.
Connect 7L40 to 7LA40D2.		  
ATCO 22-Mar-22 07:00 22-Mar-22 17:00 10 Hours
Continuous		 7L77 7L65 Rebuild Project  
ATCO 29-Jun-22 07:00 01-Jul-22 17:00 2.42 Days
Continuous		 766S 701, 766S 901T RAS modifications for the Pattern Lanfine WAGF project  
ATCO 12-Jul-22 07:00 16-Jul-22 17:00 4.42 Days
Continuous		 774S 701, 7L224 RAS modifications for the Pattern Lanfine WAGF project  
ATCO 27-Jul-22 07:00 31-Jul-22 17:00 4.42 Days
Continuous		 767S 702, 7L760 RAS modifications for the Pattern Lanfine WAGF project  
ATCO 05-Sep-22 08:00 30-Sep-22 16:00 25.33 Days
Continuous		 972S 900BS2 CETO project  
ATCO 22-Oct-22 07:00 02-Nov-22 17:00 11.42 Days
Continuous		 7L129 Re stringing conductor  

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: 2020-05-20   3:50:54 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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