Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2020-08-22

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 11-Sep-20 16:00 231.29 Days
Continuous		 2029s ACF13 (2029s Heathfield) Forced outage repairs  
ATCO 06-Jul-20 08:00 30-Aug-20 16:00 55.33 Days
Continuous		 826s 902T (826s Marguerite Lake) breaker fail protection upgrade  
Syncrude 03-Aug-20 08:00 23-Aug-20 20:00 20.5 Days
Continuous		 Aurora T3 (Aurora) maintenance  
ENMAX, ALTALINK 04-Aug-20 08:00 06-Sep-20 16:00 33.33 Days
Continuous		 24.83L (74s Janet - ENMAX 24) transmission line relocate  
Syncrude 10-Aug-20 08:00 23-Aug-20 20:00 13.5 Days
Continuous		 Aurora 11 (Aurora), Aurora 12 (Aurora), Aurora 13 (Aurora) operate breaker and switch  
ATCO 17-Aug-20 07:00 28-Aug-20 17:00 11.42 Days
Continuous		 2029s ACF14 (2029s Heathfield) trip coil testing  
ATCO 17-Aug-20 10:00 24-Aug-20 15:00 7.21 Days
Continuous		 7L40 (733s Simonette - 813s Little Smoky) x-arm change out  
ALTALINK 20-Aug-20 07:00 22-Aug-20 18:00 2.46 Days
Continuous		 707L (54s - 166s) - GOI Fire mitigation to repair Structures #5 - 8, 16 - 19, 24, 35 & 36  
ATCO 20-Aug-20 08:00 24-Aug-20 16:00 4.33 Days
Continuous		 7L22 (811s Clairmont Lake - 7L22D2) protection upgrade  
ALTALINK 22-Aug-20 07:00 22-Aug-20 18:00 11 Hours
Daily		 725L (15s - I240s - L674s) GOI maintenance work and work on str 27.  
ATCO 24-Aug-20 07:00 24-Aug-20 12:00 5 Hours
Continuous		 2075S ACF13 HOLE TAPPING ON ACF13 CAP TOWERS @2075S, Tap holes on ACF13 cap towers to prevent future damage
No constraints, redundant filter bank ACF 23 is still in service		  
EPCOR 24-Aug-20 07:00 28-Aug-20 17:00 4.42 Days
Continuous		 Dome TX1 Maintenance / Doble  
ALTALINK 24-Aug-20 07:15 28-Aug-20 17:45 4.44 Days
Continuous		 901L (63s - 64s - 74s) GOI Emergency Repair: repairing damaged tower legs on structures 142, 143, 154  
ALTALINK 24-Aug-20 07:30 03-Sep-20 18:30 10.46 Days
Continuous		 511s T30 & ACF 14 - GOI Pallet Switch change on 511s180; SVC Plus Fire System inspection; General Maintenance on lighting  
ATCO 24-Aug-20 08:00 27-Aug-20 17:00 3.38 Days
Continuous		 885S 902T 885S 902T Major PM

902T @ 885S OOS		  
ALTALINK 24-Aug-20 08:00 03-Sep-20 18:00 10.42 Days
Continuous		 1325L (510s - 511s) - GOI Annual inspection & maintenance  
BCH 24-Aug-20 09:00 26-Aug-20 17:00 2.33 Days
Continuous		 5L98 (BCH Nicola - Vaseux Lake) station maintenance AB-BC
ATCO 24-Aug-20 09:00 28-Aug-20 16:00 4.29 Days
Continuous		 755S 903, 9L27 Repair leaks on Breaker, require manufacturer representative on site.
Repair leaks on BKR 903 repair 903A, 9L29D1

Ring bus open as well as 9L27 OOS		  
ALTALINK 24-Aug-20 09:15 28-Aug-20 17:45 4.35 Days
Continuous		 887L (48s - BCK) GOI excavating soil to reduce grade between strs 8, 9, maintenance on Strs 12, 44 and replacing Structures 27, 53, 56, 57, 58 AB-BC
ALTALINK 24-Aug-20 09:30 30-Aug-20 17:30 6.33 Days
Continuous		 28s R1(Tx18490) GOI emergency repair: bushing replacement  
ATCO 24-Aug-20 12:00 24-Aug-20 18:00 6 Hours
Continuous		 2075S ACF14 HOLE TAPPING ON ACF14 CAP TOWERS @2075S

Tap holes on ACF14 cap towers to prevent future damage

No constraints, redundant filter bank ACF 24 is still in service		  
ATCO 25-Aug-20 07:00 25-Aug-20 12:00 5 Hours
Continuous		 2075S ACF24 HOLE TAPPING ON ACF24 CAP TOWERS @2075S

Tap holes on ACF24 cap towers to prevent future damage

No constraints, redundant filter bank ACF 14 is still in service		  
ALTALINK 25-Aug-20 08:30 27-Aug-20 17:00 2.35 Days
Continuous		 574s T1 TX18796 - GOI PRC-5 574sT1 Maintenance & Doble. Neutral conductor replacement, Oil Leak, AC supply and SFRA Testing.  
ATCO 25-Aug-20 12:00 25-Aug-20 16:00 4 Hours
Continuous		 2075S ACF23 HOLE TAPPING ON ACF23 CAP TOWERS @2075S

Tap holes on ACF23 cap towers to prevent future damage

No constraints, redundant filter bank ACF 13 is still in service		  
ATCO 26-Aug-20 07:00 27-Aug-20 18:00 1.46 Days
Continuous		 2075S ACF12 REPAIRS TO ACF12 CAPACITOR BANK STRUCTURAL TOWERS @2075S

REPAIR STRUCTURAL TOWERS SUPPORTING ACF12 CAPACITOR BANKS

No constraints, redundant filter bank ACF 22 is still in service		  
ALTALINK 26-Aug-20 07:30 28-Aug-20 18:30 2.46 Days
Continuous		 511s ACF 21 & 22 - GOI Switch Inspection and Cleaning; Filter Bank Inspection  
ALTALINK 26-Aug-20 09:00 26-Aug-20 15:00 6 Hours
Daily		 42s 240kV North Bus GOI Remove bird nest from North BUS. Bird Nest between N&S 240kv buses. Bird nest is in potential to cause power issue. "The Ravens nest at 42s seems to be getting a little messy. Long stringy strands hanging and blowing from the nest. May pose a flash over risk if it gets any bigger, or falls apart etc.  
ENMAX 27-Aug-20 08:00 28-Aug-20 18:00 1.42 Days
Continuous		 1003L Power factor test HV LA 25MD240-1003. Replace switch mech SW140, SW141  
ALTALINK 27-Aug-20 13:00 27-Aug-20 17:00 4 Hours
Daily		 794L (157s-A819s) - GOI Scope of includes maintenance on Str 170  
EPCOR 28-Aug-20 12:00 28-Aug-20 14:00 2 Hours
Continuous		 BellamyTX#2 and Rossdale TX#1 Place RR723 into service  
EPCOR 31-Aug-20 07:00 31-Aug-20 17:00 10 Hours
Continuous		 Petrolia 1164L Doble  
ATCO 31-Aug-20 07:00 01-Sep-20 18:00 1.46 Days
Continuous		 2075S ACF22 REPAIRS TO ACF22 CAPACITOR BANK STRUCTURAL TOWERS @2075S

REPAIR STRUCTURAL TOWERS SUPPORTING ACF22 CAPACITOR BANKS

No constraints, redundant filter bank ACF 12 is still in service		  
EPCOR 31-Aug-20 07:00 04-Sep-20 17:00 4.42 Days
Continuous		 Summerside TX#1 Doble Testing  
ATCO 31-Aug-20 07:00 18-Sep-20 17:00 18.42 Days
Continuous		 2029S ACF11 Perform PRC005 tests on all devices associated with ACF11, Filter will be unavailable, One device worked on at a time.
10BF11+SW1
Breaker fail relay
94 relay 10BF11+SW1K302
86 relay 10BF11+SW1K861
94 relay 10BF11+SW1K301
10R10+R21
10R10+R21F602 trench relay
10R10+R21F604 trench relay
10R10+R21F502 trench relay
10R10+R21F504 trench relay
87 diff relay 10R10+R21F872
86 relay 10R10+R21K862
94 relay 10R10+R21K942
10R01+R1
94 relay 10R01+R1K11
86 relay 10R01+R1K10
1218
Trip Coil 1218A1
Trip Coil 1218A2
Trip Coil 1218B1
Trip Coil 1218B2
Trip Coil 1218C1
Trip Coil 1218C2		  
EPCOR 31-Aug-20 07:00 23-Oct-20 17:00 53.42 Days
Continuous		 TX4 @ Jasper Bushing Replacement & Oil Work  
ALTALINK 31-Aug-20 07:30 02-Sep-20 18:30 2.46 Days
Continuous		 511s1352 (ACF 12) - GOI Filter bank inspection & paint Reactor L2 in C Phase  
ATCO 31-Aug-20 08:00 03-Sep-20 16:00 3.33 Days
Continuous		 7L39, 811S 709 811S Clairmont Lake Protection upgrades
Wiring modification to 21A/7L39 & 21B/7L39
709CT modification, 709 Logic/Alarms, SCADA updates, SCADA End-End Checks and 1Z wiring		  
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, 902S Mobile Sub to carry 701T load
Remove old panel, Enter terminate outdoor apparatus, Install new panels, Test 7L03 Protection Relays & Logic/Alarms, CT Work, & SCADA End-to-End testing		  
ATCO 31-Aug-20 08:00 25-Oct-20 16:00 55.33 Days
Continuous		 826S 901T 826S Marguerite P&C Upgrade 240/144kV Breaker Fail Protection
Complete wiring for new 87TA, 87TB, and 51TV relays, Complete wiring for 87B/700BS1 and 87B/900BS1
Add 901TD and 701TD status to 87TB and commission		  
BCH 31-Aug-20 09:00 11-Sep-20 17:00 11.33 Days
Continuous		 5L91 (Ashton Creek - Selkirk) insulator replacement - BC Maintenance does not affect the Alberta ATC AB-BC
ATCO 31-Aug-20 09:30 03-Sep-20 16:00 3.27 Days
Continuous		 827S SVC perform testing on 703T, and other equipment.SVC will be offline  
ALTALINK 31-Aug-20 10:00 31-Aug-20 17:00 7 Hours
Daily		 498s666 (666L) Advice Outage on 498s666 to implement/function sync check changes on M388/389 relay  
ATCO 31-Aug-20 10:00 06-Sep-20 15:00 6.21 Days
Continuous		 7L40 XARM change out  
ALTALINK 31-Aug-20 12:30 03-Sep-20 17:00 3.19 Days
Continuous		 275s5 GOI 1st trip to be done and then PRC5 maintenance and replace grading capacitors.  
EPCOR 01-Sep-20 07:00 01-Sep-20 17:00 10 Hours
Continuous		 915L Doble Testing  
ALTALINK 01-Sep-20 07:00 02-Sep-20 17:00 1.42 Days
Continuous		 920L (71s - E557s) - GOI Line clearance mitigation on Structures #XXX  
EPCOR 01-Sep-20 07:00 02-Sep-20 17:00 1.42 Days
Continuous		 ALTALINK - 920LE - GOI @ CASTLEDOWNS Line clearance mitigation on Structures #XXX  
BCH 01-Sep-20 08:00 01-Sep-20 18:00 10 Hours
Continuous		 5L52 (Custer - Ingledow) BPA outage AB-BC
BCH 01-Sep-20 08:00 03-Sep-20 17:00 2.38 Days
Continuous		 2L113 (B1s Natal - B2s Cranbrook) disconnect maintenance/structure replacement AB-BC
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 10:00 01-Sep-20 12:00 2 Hours
Daily		 953L (755s - 574s) De-energize Upgrade 9933R MPLS node. Loss of TPR requires 953L open for system stability  
EPCOR 02-Sep-20 07:00 02-Sep-20 17:00 10 Hours
Continuous		 947L Doble Testing  
EPCOR 02-Sep-20 07:00 02-Sep-20 17:00 10 Hours
Continuous		 Cloverbar TX2 Tapchanger Maint  
ALTALINK 02-Sep-20 07:00 03-Sep-20 05:00 22 Hours
Continuous		 T1, 263s 138kV bus 1, 718L, 870L GOI 24hour outage to replace 263s1,138kv motor operated disconnect switch, qty 24 string glass insulators to be changed out.  
ATCO 04-Sep-20 08:00 07-Sep-20 16:00 3.33 Days
Continuous		 7L68 Wiring modification to 21A/7L68 & 21B/7L68
707CT modification, 707 Logic/Alarms, SCADA updates, SCADA End-End Checks and 1Z wiring		  
ALTALINK 07-Sep-20 07:00 15-Sep-20 17:00 8.42 Days
Continuous		 172L(370s - 181s) GOI Move 552 breaker protection to new control building. Replace 370s176 insulators.  
ALTALINK 07-Sep-20 07:15 10-Sep-20 17:45 3.44 Days
Continuous		 464L (87s - 209s) Advice SCADA upgrade  
ALTALINK 07-Sep-20 08:00 07-Sep-20 14:00 6 Hours
Daily		 74s 240kV B2 Bus GOI Creating open point 'A' in 240kV B2 Bus.  
SUNCOR 07-Sep-20 08:00 20-Sep-20 18:00 13.42 Days
Continuous		 29EDD-34 line outage to perform 5/10yr PM 29PL6-38 buss and transformers:
29EDD34;29PP-102 SYSTEM;PM 5y,10y,
29EDD34;29PL6-38 SYSTEM;PM 5y,10y,
29EDD34;29PT-340 SYSTEM;PM 5y,10y
Open valve for sample 29pt340 at 29EDD34		  
REDDEER, ALTALINK 07-Sep-20 09:00 10-Sep-20 15:30 3.27 Days
Continuous		 209s T1 (209s Timberlands), 209S Timberlands, 464L (87s Gaetz - 209s Timberlands), 768L (209s Timberlands - 217s North Red Deer) seal leaks around cables  
ALTALINK 07-Sep-20 13:00 17-Sep-20 12:30 9.98 Days
Continuous		 74s352, 74s252 (929L) GOI Replace 138kV switches 3N and 3X.  
ATCO 08-Sep-20 07:00 10-Sep-20 16:00 2.38 Days
Continuous		 801S 907 801S Anderson 907 BREAKER MIN OIL HLR PARTIAL TESTING
BKR 907 Partial Maint.		  
ENMAX 08-Sep-20 08:00 08-Sep-20 16:00 8 Hours
Continuous		 162B240-RB134 HV Breaker maintenance 162B240-RB134. Dashpot checks  
ATCO 08-Sep-20 08:00 12-Sep-20 17:00 4.38 Days
Continuous		 839S 701T Mercer Pulp Work:
Protection Upgrades Bkr 19 and 15
ATCO Work:
Transformer Protection Upgrade
Line Protection Upgrade
SCADA Upgrade
Tap Changer Refurbishment
Leak Repairs 701T, 400PT1
PCB Samples		  
ATCO 09-Sep-20 10:00 11-Sep-20 16:00 2.25 Days
Continuous		 793S 704 793S 704 GOI for 7L04 Protection Upgrade
7L04 Protection upgrade, construction and commission
7L04 will be out of service until protection is good
this work is coordinated with the 701T Outage at 839S 2-51989 Sept 8-12, 2020

While the GOI at 839S Diashowa is occuring, we need a GOI on breaker 704 to finish the Protection Upgrade construction and commission.

wiring
commissioning
AC Injection		  
ALTALINK 09-Sep-20 12:31 09-Sep-20 17:30 4.98 Hours
Daily		 719L (378s - 575s) GOI adding grounding alarms/wiring to CVT modules (378sCVT4)  
ALTALINK 12-Sep-20 07:15 12-Sep-20 17:45 10.5 Hours
Daily		 38s18 (T4) - GOI Installation of Grading Capacitors to Breaker 38s18  
EPCOR 14-Sep-20 07:00 18-Sep-20 17:00 4.42 Days
Continuous		 Genesee 1202 Doble  
EPCOR 14-Sep-20 07:00 25-Sep-20 17:00 11.42 Days
Continuous		 CV5 @ Castledowns & Victoria maint and splice repair  
ENMAX 14-Sep-20 08:00 14-Sep-20 11:00 3 Hours
Continuous		 25B240-D134 SF6 Sample  
ATCO 14-Sep-20 08:00 18-Sep-20 17:00 4.38 Days
Continuous		 848S 902T 902T MAJOR TESTING  
ATCO 14-Sep-20 08:00 25-Sep-20 17:00 11.38 Days
Continuous		 840S CONVERTER 840S McNeill Fall 2020 Outage

PRC-005 Maintenance		 AB-SK
ALTALINK 14-Sep-20 08:00 02-Oct-20 19:00 18.46 Days
Continuous		 1201L (520s Bennett - BCH Cranbrook) -There is a broken steel core on the right phase, sub- conductor as the spacers are all pulled from tower 187-203.Crews will identify the sub-conductor that has the broken steel core, remove all spacers, replacing the damaged sub-conductor between Str 186 and 204, re-install spacers and replace any damaged spacers. AB-BC
ALTALINK 14-Sep-20 08:30 17-Sep-20 16:30 3.33 Days
Continuous		 510s1252 (ACF 12) - GOI Annual inspection & maintenance  
ALTALINK 14-Sep-20 09:00 16-Sep-20 16:00 2.29 Days
Continuous		 2s T1 (Tx18633) / 87L GOI 138kV VT Replacement  
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)  
MONTANA 14-Sep-20 09:00 02-Oct-20 18:00 18.38 Days
Continuous		 MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
ATCO 14-Sep-20 10:00 21-Sep-20 15:00 7.21 Days
Continuous		 7L40 XARM change out  
ENMAX 14-Sep-20 11:00 14-Sep-20 13:00 2 Hours
Continuous		 25B240-D135 SF6 Sample  
ENMAX 14-Sep-20 13:00 14-Sep-20 16:00 3 Hours
Continuous		 25B240-D136 SF6 Sample  
ALTALINK 14-Sep-20 13:30 14-Sep-20 15:30 2 Hours
Daily		 370s207X Advice Trip test 370s207X (Breaker 252) initiated by 370s175 (552) Breaker Fail Protection  
ENMAX 15-Sep-20 08:00 15-Sep-20 11:00 3 Hours
Continuous		 25B240-D141 SF6 Sample  
ALTALINK 15-Sep-20 09:00 15-Sep-20 18:30 9.5 Hours
Daily		 77s14 - GOI 77s14 Maintenance including 1st Trip test.  
ENMAX 15-Sep-20 11:00 15-Sep-20 13:00 2 Hours
Continuous		 25B240-D142 SF6 Sample  
ATCO 15-Sep-20 12:01 28-Sep-20 16:00 13.17 Days
Continuous		 7L69 731S Elmworth Bkr Replacement and Protection Upgrade
Northstone generation will not be required off line as there will be a temporary Rate of Change of Frequency protection in Place.
Northstone DTT will be returned to normal at the end of outage		  
ENMAX 15-Sep-20 13:00 15-Sep-20 16:00 3 Hours
Continuous		 25B240-D131 SF6 Sample  
ENMAX 16-Sep-20 08:00 16-Sep-20 12:00 4 Hours
Continuous		 25B240-D140 SF6 Sample  
ALTALINK 16-Sep-20 09:00 16-Sep-20 17:00 8 Hours
Daily		 77s26 - GOI 77s26 Maintenance including 1st Trip test.  
ALTALINK 16-Sep-20 17:00 17-Sep-20 16:00 23 Hours
Continuous		 77s29 - GOI 77s29 Maintenance including 1st Trip test.  
ALTALINK 17-Sep-20 08:00 17-Sep-20 18:00 10 Hours
Daily		 830L(526s - A840s) GOI Reframe 830L82 with horizontal line post insulators and lower Fortis cross arm to mitigate line clearance violation. AB-SK
ALTALINK 17-Sep-20 12:05 17-Sep-20 18:00 5.92 Hours
Daily		 74s 240kV B2 Bus GOI Close open point in 240kV B2 Bus.  
ENMAX 18-Sep-20 08:00 18-Sep-20 18:00 10 Hours
Continuous		 50L. 21.2TR. 138KV PT @ Bearspaw. 21 CAP. 21PT138-Z31 Fall Substation Washing  
ENMAX 19-Sep-20 08:00 19-Sep-20 18:00 10 Hours
Continuous		 21.80L. 20.82L. TAU CAP. 21.1TR. 21.4TR Fall Substation Washing  
ENMAX 19-Sep-20 09:00 19-Sep-20 10:00 60 Mins
Continuous		 Altalink 5s T1 Substation Washing. 2MD112  
ENMAX 19-Sep-20 10:00 19-Sep-20 11:00 60 Mins
Continuous		 Altalink 5s T2 Substation Washing. 2MD113  
CNRL 20-Sep-20 07:30 22-Sep-20 18:00 2.44 Days
Continuous		 842s 75-TR-8701 (842s Horizon Upgrading) transformer maintenance  
EPCOR 21-Sep-20 07:00 22-Sep-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 21-Sep-20 07:00 22-Sep-20 18:00 1.46 Days
Continuous		 787L (166s - 787L33) - GOI Maintenance on structures 38, 40, 41, 42  
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 07:00 25-Sep-20 17:00 4.42 Days
Continuous		 1044L (E805s-E816s)Epcor - Info Epcor - VT replacement  
ATCO 21-Sep-20 08:00 02-Oct-20 17:00 11.38 Days
Continuous		 2029S ACF21 ACF21 CA-300 CT Upgrades, redundant filter banks in service, no system impact  
ALTALINK 21-Sep-20 08:30 23-Sep-20 16:30 2.33 Days
Continuous		 510s2252 (ACF 22) - GOI Annual inspection & maintenance  
ALTALINK 21-Sep-20 09:15 24-Sep-20 16:45 3.31 Days
Continuous		 87L (245s - 2s) GOI 138kV CT Replacement (245s T1), Structure maintenance (87L; str 6, 16)  
ATCO 21-Sep-20 10:00 30-Sep-20 16:00 9.25 Days
Continuous		 7L59 Cross- Arm change out  
CNRL 22-Sep-20 07:30 27-Sep-20 18:00 5.44 Days
Continuous		 842s 75-TR-5701 (842s Horizon Upgrading) transformer maintenance  
ATCO 22-Sep-20 08:00 25-Sep-20 17:00 3.38 Days
Continuous		 856S 902T 902T preventive maintenance and bird proofing, 901T and 903T will be in service  
ENMAX 22-Sep-20 13:00 22-Sep-20 18:00 5 Hours
Continuous		 23.80L. 23.4TR Fall Substation Washing  
ALTALINK 23-Sep-20 07:00 25-Sep-20 18:00 2.46 Days
Continuous		 787L (71s - 787L29) - GOI Maintenance on structures 2, 3, 8, 12, 13, 15, 16, 21, 22, 23,24, 25, 26, and 28. Maintenance on 71s452. 71s7 contact replacement. 71s787X maintenance.  
ALTALINK 23-Sep-20 07:15 23-Sep-20 15:45 8.5 Hours
Continuous		 163s T1(TX18483) GOI Replace 13.8kV LAs  
CNRL 23-Sep-20 07:30 28-Sep-20 18:00 5.44 Days
Continuous		 842s 75-TR-7701 (842s Horizon Upgrading) transformer maintenance  
ALTALINK 23-Sep-20 08:00 23-Sep-20 16:00 8 Hours
Daily		 388s708A - GOI Maintenance on 388s708A including 1st trip testing. Repair 439sBKR500 Bkr Fail Init  
ENMAX 24-Sep-20 08:00 24-Sep-20 12:00 4 Hours
Continuous		 28.80L. 28.2TR. 28PT138-Z31 Fall Substation Washing  
ALTALINK 25-Sep-20 08:00 01-Oct-20 17:00 6.38 Days
Continuous		 310p T35 - GOI ST5/6 Bus Protection Upgrade.  
CNRL 26-Sep-20 07:30 29-Sep-20 18:00 3.44 Days
Continuous		 75-PLH-901 (838s Horizon Mining - 849s Joslyn) Line Maintenance and CT Testing  
ATCO 26-Sep-20 08:30 27-Sep-20 12:30 28 Hours
Continuous		 849S 903 PRC-005 - TRIP COIL TESTING - BREAKER 903 @ 849S, To be coordinated with CNRL Horizon Shutdown

BREAKER 903 OOS		  
ATCO 26-Sep-20 13:00 27-Sep-20 15:00 26 Hours
Continuous		 849S 906 PRC-005 - TRIP COIL TESTING - BREAKER 906 @ 849S, To be coordinated with CNRL Horizon Shutdown

BREAKER 906 OOS		  
ATCO 26-Sep-20 15:00 27-Sep-20 17:00 26 Hours
Continuous		 75-PLH-901, 849S 907 PRC-005 - TRIP COIL TESTING - BREAKER 907 @ 849, To be coordinated with CNRL Horizon Shutdown
75-PLH-901 open ended at 849S Joslyn		  
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 02-Oct-20 17:00 4.42 Days
Continuous		 2029S ACF22 ACF22 CA-300 CT Upgrades,Filter will be unavailable for duration of work, reduced redundancy  
ALTALINK 28-Sep-20 07:00 05-Oct-20 19:00 7.5 Days
Continuous		 268s T1 & VR1 - GOI High and low side bushings replacement along with oil leak mitigation on T1 & VR1  
EPCOR 28-Sep-20 07:00 31-Dec-20 17:00 94.46 Days
Continuous		 Bellamy Tx1 Bellamy TX1 regasketing work  
CNRL 28-Sep-20 07:30 30-Sep-20 18:00 2.44 Days
Continuous		 75-PLH-903 (838s Horizon Mining - 842s Horizon Upgrading) Line Maintenance and CT Testing  
ALTALINK 28-Sep-20 07:30 01-Oct-20 17:30 3.42 Days
Continuous		 87s T1(TX18511) Advice SCADA upgrade  
ENMAX 28-Sep-20 08:00 28-Sep-20 12:00 4 Hours
Continuous		 65B240-D133 SF6 sample. 65B240-D133 Remove birds nest and add deterant  
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		  
ALTALINK 28-Sep-20 08:00 05-Oct-20 18:30 7.44 Days
Continuous		 19s 240kV Bus A & B (T8, T10, 902L & 905 Replacing 240kV string insulators  
ALTALINK 28-Sep-20 08:30 01-Oct-20 16:30 3.33 Days
Continuous		 510s5172 - GOI Annual inspection & maintenance  
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)  
ALTALINK 28-Sep-20 10:00 01-Oct-20 17:00 3.29 Days
Continuous		 520s and 1114L(102s-520s) GOI FAC 501 switches 102s2689, 102s130, 102s132 need to be operated and 520s 500kV corona ring is bent and needs adjustment at 502s13 upper bus.  
ATCO 28-Sep-20 10:00 05-Oct-20 15:00 7.21 Days
Continuous		 7L20 Replacement of under rated and rotten crossarms  
ALTALINK 28-Sep-20 10:30 08-Oct-20 18:00 10.31 Days
Continuous		 86s1752 (914L to 87s)GOI 86s1752 breaker replacement and 86s1752 CT replacement  
ENMAX 28-Sep-20 12:00 28-Sep-20 16:00 4 Hours
Continuous		 65B240-D130 SF6 Sample. 65B240-D130 Remove birds nest and add deterant  
ENMAX 28-Sep-20 13:00 28-Sep-20 18:00 5 Hours
Continuous		 7.84L. 36.81L. 36.1TR. 36.3TR. 36PT138-Z31. 7PT138-7.84 Fall Substation Washing  
ALTALINK 29-Sep-20 07:00 01-Oct-20 17:30 2.44 Days
Continuous		 163s 138kV partial bus Advice Install new switch before circuit switcher to allow replacement of circuit switcher with breaker (ref 271522). Replace insulators on 138kV lines, 871L, 669L, 760L Install new "A" line protection for 871L  
ALTALINK 29-Sep-20 07:45 29-Sep-20 17:45 10 Hours
Daily		 520sT1-4 (Tx18416) GOI fix main tank filter, In coordination with 1114L and 1201L GOI's  
ENMAX 29-Sep-20 08:00 29-Sep-20 12:00 4 Hours
Continuous		 162B240-RB135 162B240-RB135 C-PHASE (Far) SF6 Gas Resample  
ALTALINK 30-Sep-20 07:45 30-Sep-20 17:45 10 Hours
Daily		 520sR7B (Tx18438) GOI fix rad leak, In coordination with 1114L and 1201L GOI's  
CNRL 01-Oct-20 07:30 04-Oct-20 18:00 3.44 Days
Continuous		 75-PLH-904 (838s Horizon Mining - 842s Horizon Upgrading) Line Maintenance  
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 03-Oct-20 08:00 11-Oct-20 18:00 8.42 Days
Continuous		 428s23 (PCES01L) GOI protection upgrades, breaker maintenance (428s23)  
ALTALINK 05-Oct-20 07:00 05-Oct-20 20:00 13 Hours
Continuous		 268s PT3 (503L & 526L) - GOI Replacing 268s PT3  
ATCO 05-Oct-20 07:00 09-Oct-20 17:00 4.42 Days
Continuous		 2029S ACF23 ACF23 CA-300 CT Upgrades, Filter will be unavailable for duration of work, reduced redundancy  
ALTALINK 05-Oct-20 07:30 08-Oct-20 17:30 3.42 Days
Continuous		 87s T2(TX18339) Advice SCADA upgrade  
ALTALINK 05-Oct-20 09:00 08-Oct-20 18:00 3.38 Days
Continuous		 207L(17s - L111s) GOI Components and Structure replacement's on 207L. Str's Range 1-23.  
ALTALINK 05-Oct-20 10:45 08-Oct-20 17:45 3.29 Days
Continuous		 266s FSC 1 GOI FAC501 yearly maintenance  
ALTALINK 05-Oct-20 11:00 08-Oct-20 17:00 3.25 Days
Continuous		 575s719X (719L) Advice Settings Changes of Sync Check and Functional Testing on CUH90 relay for 575s719X  
ALTALINK 06-Oct-20 07:45 08-Oct-20 17:45 2.42 Days
Continuous		 5s T2(TX18835) GOI doble, maintenance  
ALTALINK 06-Oct-20 08:00 13-Oct-20 17:00 7.38 Days
Continuous		 310p T30/T37 - GOI T30 A & B Protection Upgrade & 310p140 PT 138 kV Replacement.  
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		  
ATCO 06-Oct-20 10:00 14-Oct-20 16:00 8.25 Days
Continuous		 7L59 7L59 XARM change Wildfire Mitigation  
ALTALINK 07-Oct-20 07:30 18-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 & doble will also be completed if time exists  
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  
BCH 12-Oct-20 09:00 14-Oct-20 17:00 2.33 Days
Continuous		 5L92 (Cranbrook - Selkirk) annual plan request F19 AB-BC
EPCOR 13-Oct-20 07:00 13-Oct-20 17:00 10 Hours
Continuous		 C2404 Doble  
EPCOR 13-Oct-20 07:00 23-Oct-20 17:00 10.42 Days
Continuous		 TX1 @ Petrolia DGA Install  
ATCO 13-Oct-20 08:00 26-Oct-20 16:00 13.33 Days
Continuous		 7L32 710CT modification, 710 Logic/Alarms, SCADA updates, SCADA End-End Checks and 1Z wiring  
ALTALINK 13-Oct-20 09:00 14-Oct-20 17:30 1.35 Days
Continuous		 74s23.80 (23.80L) GOI 138kV breaker maintenance  
ALTALINK 13-Oct-20 09:00 22-Oct-20 18:00 9.38 Days
Continuous		 207L(17s - L111s) GOI Components and Structure replacement's on 207L. Str's Range 1-23.  
BCH 13-Oct-20 09:00 23-Oct-20 17:00 10.33 Days
Continuous		 2L293 (Nelway - Selkirk) structure replacement - BC Maintenance does not affect the Alberta ATC AB-BC
ATCO 13-Oct-20 10:00 19-Oct-20 15:00 6.21 Days
Continuous		 7L20 Replacement of under rated and rotten crossarms  
ALTALINK 13-Oct-20 13:00 15-Oct-20 17:00 2.17 Days
Continuous		 12s T1 - GOI 12sT1 Doble A,B,C, T1-B Qualitrol cycling power,  
ALTALINK 14-Oct-20 07:00 28-Oct-20 18:00 14.46 Days
Continuous		 370s 138kV BUS 1 and T1(Tx18421) GOI Move 652 breaker protection to new control building. Replace 370s179 insulators.  
ALTALINK 15-Oct-20 08:00 15-Oct-20 17:00 9 Hours
Daily		 310p T34 - GOI T34 Meter Replacement.  
EPCOR 19-Oct-20 07:00 20-Oct-20 17:00 1.42 Days
Continuous		 Castle Downs S/S Tx1 Outage Outage required for protection upgrade project  
ENMAX 19-Oct-20 08:00 20-Oct-20 18:00 1.42 Days
Continuous		 771L. 47.1TR. 47.2TR HV SW maint SW84, SW85 at 162sub. Backfeed sstr from 25kV bus.  
ALTALINK 19-Oct-20 09:00 19-Oct-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  
ALTALINK 19-Oct-20 09:00 29-Oct-20 17:00 10.33 Days
Continuous		 1081L (17s-281s) - GOI Replace 17s1081 Underhung Switch and MOD, 17s23 switch, 17s32 switch  
BCH 19-Oct-20 09:00 30-Oct-20 09:00 11 Days
Continuous		 1L274 (B1s BCH Natal - 1D1L274) structure refurbishment AB-BC
ATCO 19-Oct-20 10:00 28-Oct-20 16:00 9.25 Days
Continuous		 7L59 7L59 XARM change Wildfire Mitigation  
ALTALINK 19-Oct-20 10:30 29-Oct-20 18:00 10.31 Days
Continuous		 86s1252 (Affecting 914L to 289s) GOI 86s1252 breaker replacement  
ALTALINK 19-Oct-20 11:00 22-Oct-20 18:00 3.29 Days
Continuous		 320P PS2 – GOI Doble test 320P PS2  
ALTALINK 20-Oct-20 07:30 23-Oct-20 23:30 3.67 Days
Continuous		 38s7252 - GOI Replace CT31  
ALTALINK 20-Oct-20 08:00 27-Oct-20 17:00 7.38 Days
Continuous		 310p T36 - GOI T36 A & B Protection Upgrade.  
EPCOR 21-Oct-20 07:00 23-Oct-20 17:00 2.42 Days
Continuous		 Castle Downs S/S Tx2 Outage Outage required for protection upgrade project  
ENMAX 21-Oct-20 08:00 22-Oct-20 18:00 1.42 Days
Continuous		 25s. 25B240-D131. 25B240-D134. 25B240-D140. 25PT240-Z41 240kV Bus HV SW maint SW145, SW149. Replace switch mech SW131, SW137.  
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:

ATCO would like to request AESO for a 750MW power transfer on EATL 13L50 to occur before our link outage on October 26, 2020.
The power transfer would have to occur approx. 1 hour before our switching on October 26.
The requested power transfer will ensure that our DIW expansion tank alarming is correct.

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 26-Oct-20 09:00 05-Nov-20 18:00 10.42 Days
Continuous		 207L(17s - L111s) GOI Components and Structure replacement's on 207L. Str's Range 1-23.  
ATCO 26-Oct-20 10:00 02-Nov-20 15:00 7.25 Days
Continuous		 7L20 Replacement of under rated and rotten crossarms  
ALTALINK 27-Oct-20 10:00 27-Oct-20 10:30 30 Mins
Daily		 396s412 Breaker open Upgrade 396s MPLS node. Loss of 412L TPR requires 412L to be open due to system stability. Coordinated with 322s outage at same time. AB-BC
ALTALINK 29-Oct-20 09:00 29-Oct-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.  
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.  
ALTALINK 02-Nov-20 07:15 05-Nov-20 17:45 3.44 Days
Continuous		 914L (87s - 63s) Advice SCADA upgrade  
EPCOR 02-Nov-20 09:30 06-Nov-20 14:00 4.19 Days
Continuous		 1058L Line Maintenance/Upgrades  
ALTALINK 02-Nov-20 09:30 13-Nov-20 14:00 11.19 Days
Continuous		 17s13 - GOI Replace 17s13 Breaker To New SF6 Type  
ALTALINK 03-Nov-20 07:00 06-Nov-20 13:00 3.25 Days
Continuous		 61s T1, 138kV Bus 1, 202L & 836L - GOI Replacing 61s13 & the strain insulators on 836L  
ENMAX 03-Nov-20 08:00 05-Dec-20 16:00 32.33 Days
Continuous		 162.81L Line Protection Upgrade.  
ALTALINK 04-Nov-20 07:15 05-Nov-20 17:45 1.44 Days
Continuous		 1041L (370s - 554s) GOI -Install phase raiser assemblies 1041L Str 208 bottom phase for line clearance mitigation.  
ALTALINK 05-Nov-20 07:15 11-Nov-20 17:45 6.44 Days
Continuous		 918L (281s - C162s) GOI Scope of work includes maintenance on structures 764 - 842. RB on 771L for shared towers  
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.  
EPCOR 09-Nov-20 09:30 13-Nov-20 14:00 4.19 Days
Continuous		 1059L Line Maintenance & Upgrades  
ATCO 09-Nov-20 10:00 15-Nov-20 15:00 6.21 Days
Continuous		 7L20 Replacement of under rated and rotten crossarms  
ALTALINK 09-Nov-20 11:00 13-Nov-20 13:00 4.08 Days
Continuous		 61s T2, 138kV Bus 2 & 202L - GOI Replacing 61s10 & 61s11  
ALTALINK 13-Nov-20 14:30 13-Nov-20 16:30 2 Hours
Daily		 17s995N (995L) - 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 16-Nov-20 06:30 16-Nov-20 18:00 11.5 Hours
Daily		 285s 138kV South Bus - GOI Remove 285s91  
EPCOR 16-Nov-20 08:00 20-Nov-20 17:00 4.38 Days
Continuous		 J240C1 @ Jasper Cap Bank Repair/Replacement  
ENMAX 16-Nov-20 08:00 23-Nov-20 09:00 7.04 Days
Continuous		 65.1TR Online Monitoring Installation.  
BCH 16-Nov-20 09:00 18-Dec-20 09:40 32.03 Days
Continuous		 1L274 (B1s BCH Natal - 1D1L274) structure refurbishment AB-BC
ENMAX 23-Nov-20 09:00 29-Nov-20 16:00 6.29 Days
Continuous		 65.2TR Online Monitoring Installation.  
ATCO 23-Nov-20 10:00 30-Nov-20 15:00 7.21 Days
Continuous		 7L20 Replacement of under rated and rotten crossarms  
ATCO 05-Dec-20 07:00 11-Dec-20 16:00 6.38 Days
Continuous		 9L59 Outage for Garden Plain Wind Project  
ATCO 07-Dec-20 10:00 14-Dec-20 15:00 7.21 Days
Continuous		 7L20 Replacement of under rated and rotten crossarms  
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 21-Dec-20 10:00 23-Dec-20 15:00 2.21 Days
Continuous		 7L20 Replacement of under rated and rotten crossarms  
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 19-Jan-21 10:00 25-Jan-21 17:00 6.29 Days
Continuous		 9L57 Setting poles, for new OPGW to string in  
ATCO 20-Jan-21 08:00 23-Feb-21 16:00 34.33 Days
Continuous		 951S 900BS2, 951S 908, 951S 903, 951S 906 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		 9L938, 809S 902T 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 22-Aug-21 08:00 22-Aug-21 16:00 8 Hours
Continuous		 766S 901T TransAlta GARDEN PLAIN PROJECT
Complete the structural and electrical work related to protection panel, Automation & SCADA panel and telecom panels.
Complete the line work associated with Line 9LA59 which will be connected to 1045S Garden Plain substation.		  
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 29-Sep-21 08:00 01-Oct-21 16:00 2.33 Days
Continuous		 9L59 TransAlta GARDEN PLAIN PROJECT
Line 9LA59 tie-in to Garden Plain Sub		  
ATCO 29-Sep-21 08:00 01-Oct-21 16:00 2.33 Days
Continuous		 801S 903, 801S 902, 9L59 TransAlta GARDEN PLAIN PROJECT
Relay Settings changes		  
ATCO 29-Sep-21 08:00 01-Oct-21 16:00 2.33 Days
Continuous		 972S 901, 972S 902, 9L59 TransAlta GARDEN PLAIN PROJECT
Relay Settings Changes		  
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		 7L224, 774S 701 RAS modifications for the Pattern Lanfine WAGF project  
ATCO 27-Jul-22 07:00 31-Jul-22 17:00 4.42 Days
Continuous		 7L760, 767S 702 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: 2020-08-12   3:31:17 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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