Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2024-04-27

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 18-Mar-24 14:30 29-Apr-24 14:00 41.98 Days
Continuous		 863s 902T (863s Paintearth) protection upgrade, commission new wiring/trransformer protection, and new transformer protection panel  
BCH 25-Mar-24 13:50 30-Apr-24 17:00 36.13 Days
Continuous		 5CB1 (BCH Selkirk) repair damaged equipment, BC maintenance does not affect the Alberta ATC AB-BC
EPCOR 12-Apr-24 17:00 10-May-24 17:00 28 Days
Continuous		 987s CDS45 (987s Cloverbar) repair of damage 240 kV CVT in order to properly energize 1191L bay  
EPCOR 15-Apr-24 07:00 17-May-24 17:00 32.42 Days
Continuous		 816s P2402 (816s Petrolia), 816s P2401 (816s Petrolia), 816s T1 (816s Petrolia) P2401 Breaker LCR  
ALTALINK 15-Apr-24 10:00 02-May-24 18:00 17.33 Days
Continuous		 48s T1 (48s Pocaterra), 48s T2 (48s Pocaterra) adding new equipment  
ALTALINK 16-Apr-24 07:00 30-Apr-24 18:00 14.46 Days
Continuous		 701L (223s Strome - 7LA701 tap) 701L CRU and WMP component replacement (str 320D - 422)  
ATCO 16-Apr-24 07:00 30-Apr-24 18:00 14.46 Days
Continuous		 7L701 (757s Battle River - 7LA701 tap) AltaLink scope - 701L CRU and WMP component replacement (str 320D - 422)  
ALTALINK, EPCOR 22-Apr-24 07:00 27-Apr-24 17:00 5.42 Days
Continuous		 909L (310p Sundance - 665s Dome), 665s T2 (665s Dome), 665s D2402 (665s Dome), 665s D2403 (665s Dome), 665s DDS14 (665s Dome), 665s DAB2 (665s Dome) Dome: D2403 Breaker Maintenance and DAB2 Repair and TX2 Zone P&C Maintenance  
EPCOR 22-Apr-24 07:00 27-Apr-24 17:00 5.42 Days
Continuous		 52s T2 (52s East Industrial), 52s E2402 (52s East Industrial) breaker maintenance E2402 (SF6) and TX2 doble  
ATCO 22-Apr-24 09:00 05-May-24 16:00 13.29 Days
Continuous		 7L32 (813s Little Smoky - 862s South Bezanson) pole change from test and treat / X arm change  
EPCOR 23-Apr-24 07:00 27-Apr-24 17:00 4.42 Days
Continuous		 330p 1203A (330p Genesee), 330p 1211 (330p Genesee), 330p 1215 (330p Genesee), 330p 1203 (330p Genesee), 330p 1206 (330p Genesee), 330p 1209 (330p Genesee) carona ball replacement Genesee bus 2  
ATCO 23-Apr-24 11:00 02-May-24 17:00 9.25 Days
Continuous		 755s 904 (755s Cordel) HalkirkII project -
9L16 protection upgrade including modification of wiring from 904CT to 87L-21A/9L16 and RAS-A/9L16 protection relays		  
EPCOR 26-Apr-24 07:00 10-May-24 17:00 14.42 Days
Continuous		 805s T4 (805s Jasper), EP 805s J2405 (EP 805s Jasper), EP 805s J2406 (EP 805s Jasper) tap changer rebuild, doble, disconnect maintenance  
Syncrude 26-Apr-24 08:00 05-May-24 16:00 9.33 Days
Continuous		 Syncrude Plant 30-2 30-2PTR72-3 (UE-1 Syncrude Plant 30-2), UE-1 1509 (UE-1 Syncrude Plant 30-2), UE-1 72-09 (UE-1 Syncrude Plant 30-2) SCL- perform maintenance and repairs  
SUNCOR 26-Apr-24 08:00 06-May-24 16:00 10.33 Days
Continuous		 29PL9-5 (29EDD-1 Millennium - 29EDD-34) BP - System 5 year PMs for Breakers, CTs & Disconnect Switches @ 29EDD-34 and 29EDD-01  
ENMAX 27-Apr-24 12:00 27-Apr-24 18:00 6 Hours
Continuous		 23.80L (74s Janet - SS-23), 23.4TR (SS-23) Spring Substation Washing. Check reversing switch.  
ALTALINK, ENMAX 27-Apr-24 12:00 27-Apr-24 18:00 6 Hours
Daily		 74s 23.80W (74s Janet), 23.80L (74s Janet - SS-23) Spring Substation Washing. Check reversing switch.  
BCH 28-Apr-24 22:00 23-May-24 22:00 25 Days
Continuous		 5L72 (BCH Mica G.S. - BCH Nicola) MCA PM on 5B7 and 5RX3 AB-BC
EPCOR 29-Apr-24 07:00 02-May-24 17:00 3.42 Days
Continuous		 330p 1201A (330p Genesee) Carona Ball replacement Genesee 12BU1  
ALTALINK 29-Apr-24 07:30 03-May-24 16:30 4.38 Days
Continuous		 AML 511s FB Bus 1 (AML 511s Crossings), AML 511s ACF11 (AML 511s Crossings), AML 511s ACF12 (AML 511s Crossings), AML 511s ACF13 (AML 511s Crossings), AML 511s T30 (AML 511s Crossings), AML 511s SVC Plus (AML 511s Crossings) Annual ACF 11, 12, 13 Inspections, Bird Mitigation on Reactors in Filter  
ALTALINK, Lethbridge 29-Apr-24 08:00 29-Apr-24 17:00 9 Hours
Continuous		 463L (15s Fort Macleod - 463AL tap), 463L (181s Chinook - 463AL tap), 463AL (492s Monarch - 463L tap), 15s 463 (15s Fort Macleod), 181s 463L (181s Chinook) hardware tighten structures 48 & 49. Repair downlead at structures 32 & 36  
ALTALINK, TRANSALTA 29-Apr-24 08:00 05-May-24 16:00 6.33 Days
Continuous		 33s T1 (33s Spray) preventive maintenance  
ATCO 29-Apr-24 10:00 03-May-24 16:00 4.25 Days
Continuous		 951s SVC (951s Thickwood), 951s 901T (951s Thickwood Hills), 951s 902T (951s Thickwood Hills), 951s 919 (951s Thickwood Hills) PRC-005 - TRIP COIL TESTING - BREAKER 919-A @ 951S
PRC-005 - TRIP COIL TESTING - BREAKER 919-B @ 951S
PRC-005 - TRIP COIL TESTING - BREAKER 919-C @ 951S
PRC-005 - SPR TESTING - TRANSFORMER 901T @ 951S
PRC-005 - SPR TESTING - TRANSFORMER 902T @ 951S		  
ATCO 29-Apr-24 10:00 06-May-24 17:30 7.31 Days
Continuous		 813s SVC (813s Little Smoky) SVC Valve Cooling Improvements - install new HVAC units in valve rooms - SVC GLYCOL COOLED MAINTENANCE  
ALTALINK 29-Apr-24 12:30 02-May-24 15:00 3.1 Days
Continuous		 122s T3 (122s Alberta Newsprint) Repair oil leaks on T3. Oil leak mitigation on T1, T2, & T3.  
ATCO 29-Apr-24 14:01 10-Jun-24 14:00 42 Days
Continuous		 863s 901T (863s Paintearth), 863s 902T (863s Paintearth), 863s 901 (863s Paintearth), 863s 902 (863s Paintearth), 863s 901A (863s Paintearth), 863s 901TD (863s Paintearth), 863s 902A (863s Paintearth), 863s 902TD (863s Paintearth) 863S Paintearth Protection Upgrade
Add interlocks to Breakers/gang switched
Relay setting at 755S and 650S will need to change due to 900D1 being closed
load will be transferred to 764S		  
ALTALINK 30-Apr-24 08:00 02-May-24 17:00 2.38 Days
Continuous		 853L (504s Queenstown - 853AL tap) Hardware tighten structures 232, 233, 243, 251, 260, 261, 273, 276, 282, 284, 288, 290, 291, 295, 316, 321 & 325.  
BCH 30-Apr-24 08:00 11-May-24 16:00 11.33 Days
Continuous		 5L72 (BCH Mica G.S. - BCH Nicola) 5L72-Replace end of life spacer dampers AB-BC
ALTALINK 30-Apr-24 08:30 30-Apr-24 17:30 9 Hours
Daily		 320p 2952 (320p Keephills) Urgent Repair; Flash Over protection is being enabled on the 500kV breaker failure relays  
ALTALINK 01-May-24 07:00 04-Jun-24 17:30 34.44 Days
Continuous		 326s 240kV Bus 1 (326s Murray lake), 326s 152 (326s Murray Lake), 326s 352 (326s Murray Lake), 961L (326s Murray lake - 516s Forty Mile) closing 326s open point 'C' connecting 961L to 326s  
ENMAX, ALTALINK 01-May-24 08:00 01-May-24 18:00 10 Hours
Daily		 24.83L (74s Janet - SS-24) Power Factor Test - 24B138-24.83-CT, 24PT138-Z31  
ALTALINK 01-May-24 08:00 07-May-24 15:00 6.29 Days
Continuous		 753L (65s High River - 253s Blackie) Replace arms and insulators with line post insulators at structure 79, 128, 130, 136, 175, 199, 225, 229, 23 & 236. Replace arms and insulators at structure 142 & 160. Hardware tighten structures 88 & 254.  
ALTALINK 01-May-24 08:30 01-May-24 17:30 9 Hours
Daily		 320p 3052 (320p Keephills) Urgent Repair; Flash Over protection is being enabled on the 500kV breaker failure relays  
BCH 01-May-24 09:00 02-May-24 17:00 1.33 Days
Continuous		 5L52 (BPA Custer - BCH Ingledow) perform transmission line insulator maintenance & conductor testing AB-BC
ATCO, CNRL 01-May-24 11:00 01-May-24 13:00 2 Hours
Continuous		 859s 501TD (859s Primrose), 859s 52G (859s Primrose) Transfer all load from 25kV Bus A to 25kV Bus B. Note 501TD is a 25kV switch not 144kV.  
ENMAX, ALTALINK 02-May-24 08:00 02-May-24 18:00 10 Hours
Continuous		 20.82L (SS-20 - SS-21), 21.80L (42s Sarcee - SS-21), 21.1TR (SS-21), 21.4TR (SS-21) Fall Substation Washing. Altalink required to remove AML VT4 60S100 fuses  
ALTALINK 02-May-24 08:30 02-May-24 17:30 9 Hours
Daily		 320p 3152 (320p Keephills) Urgent Repair; Flash Over protection is being enabled on the 500kV breaker failure relays  
ALTALINK 03-May-24 08:00 03-May-24 17:00 9 Hours
Daily		 821L (158s Vauxhall - 421s Hays) Retie OHSW at structure 23.  
BCH 03-May-24 09:00 03-May-24 17:00 8 Hours
Continuous		 1L274 (BCH Natal - BCH Line Creek tap) 1L274 (NTL-LCC) replace structure BC maintenance does not affect the Alberta ATC AB-BC
ENMAX, ALTALINK 03-May-24 12:00 03-May-24 18:00 6 Hours
Continuous		 28.80L (42s Sarcee - SS-28), 28.2TR (SS-28) spring substation washing  
ENMAX, ALTALINK 03-May-24 12:00 03-May-24 18:00 6 Hours
Daily		 28.80L (42s Sarcee - SS-28) Spring Substation Washing.  
ENMAX, ALTALINK 04-May-24 08:00 04-May-24 16:00 8 Hours
Daily		 37.82L (74s Janet - SS-37) Power Factor Test - 37B138-37.82-CT  
ENMAX, ALTALINK 04-May-24 08:00 05-May-24 18:00 1.42 Days
Continuous		 37.82L (74s Janet - SS-37) Power Factor Test - 37B138-37.82-CT, Breaker Maintenance - 37B138-37.82, SF6 Gas Sample - 37B138-37.82  
EPCOR 06-May-24 07:00 07-May-24 17:00 1.42 Days
Continuous		 987s C2402 (987s Clover Bar) Cloverbar S/S C2402 bay outage  
EPCOR 06-May-24 07:00 07-May-24 17:00 1.42 Days
Continuous		 330p 1208 (330p Genesee) Genesee 1208 CT frame protection removal  
BCH 06-May-24 08:00 07-May-24 16:00 1.33 Days
Continuous		 5L72 (BCH Mica G.S. - BCH Nicola) 5L72 - Insulator replacements AB-BC
ALTALINK, TRANSALTA 06-May-24 08:00 10-May-24 16:00 4.33 Days
Continuous		 33s T2 (33s Spray) preventive maintenance  
BCH 06-May-24 09:00 16-May-24 17:00 10.33 Days
Continuous		 1L274 (BCH Elkford tap - BCH Line Creek tap) 1L274 (LCC-EFT) replace structure BC maintenance does not affect the Alberta ATC AB-BC
ATCO 06-May-24 09:00 19-May-24 17:30 13.35 Days
Continuous		 2029S BUILDING VALVE HALL, 2029s 1205 (2029s Heathfield), 2029s 1206 (2029s Heathfield) Annual EATL outage at 2075s & 2029s.

2029s & 2075s AC & DC O&M.

USE 2-70212 FOR 13L50 GOI
USE 2-70213 FOR 2029s GOI
USE 2-70214 FOR 2075s GOI		  
ATCO 06-May-24 09:00 19-May-24 17:30 13.35 Days
Continuous		 2075S BUILDING VALVE HALL, 2075s 916 (2075s Newell), 2075s 917 (2075s Newell) Annual EATL outage at 2075s & 2029s.

2029s & 2075s AC & DC O&M.

USE 2-70212 FOR 13L50 GOI
USE 2-70213 FOR 2029s GOI
USE 2-70214 FOR 2075s GOI		  
ATCO 06-May-24 09:00 19-May-24 17:30 13.35 Days
Continuous		 13L50 (DC LINK), 13L50 (2029s Heathfield - 2075s Newell) Annual EATL outage at 2075s & 2029s.

2029s & 2075s AC & DC O&M.

USE 2-70212 FOR 13L50 GOI
USE 2-70213 FOR 2029s GOI
USE 2-70214 FOR 2075s GOI		  
ALTALINK 06-May-24 12:00 09-May-24 18:00 3.25 Days
Continuous		 13s T2 (13s Deerland), 13s 138kV Bus 2 (13s Deerland) 13sT2 Doble, maint, LTC maint, leaks, 13s101 switch maint  
ALTALINK 06-May-24 14:00 09-May-24 17:00 3.13 Days
Continuous		 367s T1 (367s Harry Smith) PRC005 Doble, maintenance and IDD  
ALTALINK 06-May-24 14:30 09-May-24 17:30 3.13 Days
Continuous		 574s T2 (574s Nilrem) Maintenance, doble, leak repair  
ATCO, CNRL 07-May-24 07:00 16-May-24 16:00 9.38 Days
Continuous		 838s 75-TR-1801 (838s Horizon Mining) 5YR Transformer and Breaker Testing  
SUNCOR 07-May-24 08:00 04-Jun-24 16:00 28.33 Days
Continuous		 29PL6-7 (30EDD-1 - 29EDD-5), SPL6-7 (29EDD-5) BP-29EDD5; 39PT-303 / 30PL2-264 SYSTEM; PM 5y  
SUNCOR 07-May-24 09:00 21-May-24 16:00 14.29 Days
Continuous		 29EDD-1 260kV South Bus 1 (29EDD-1 Millennium), 29EDD-1 260kV South Bus 2 (29EDD-1 Millennium) BP-29EDD-1 - TA - Replace Bushings Xo and Ho T1, Replace 87T protection relay 60113163, 29EDD-1 T1 ; 29EDD-1 Test 29PS-161 - 31795556; 29EDD-1 X72B1 Replace 87B Relay - 60113221; 29EDD-1 Test IMS1 F35 Relay - 31795503  
ATCO 07-May-24 10:00 09-May-24 16:00 2.25 Days
Continuous		 7L63 (780s Lubicon - 812s Norcen), 780s 701 (780s Lubicon), 780s 702 (780s Lubicon) 7L63 RTXP test switch replacements, maintenance  
EPCOR 08-May-24 07:00 09-May-24 17:00 1.42 Days
Continuous		 330p 1202 (330p Genesee) Genesee 1202 Breaker CT frame protection removal  
SUNCOR 08-May-24 08:00 08-May-24 17:00 9 Hours
Continuous		 29PL9-24 (29EDD-94 Voyageur - 29EDD-60 Inglis Island), 29PL9-25 (29EDD-94 Voyageur - 29EDD-61 Stony Island), 29EDD-60 29PT-702 (29EDD-60 Inglis Island), 29EDD-61 29PT-653 (29EDD-61 Stony Island) BP - Perform initial energization of HV equipment via 29PL9-24/25 power line & 29PT-702/653 Transformers  
EPCOR 09-May-24 07:00 10-May-24 17:00 1.42 Days
Continuous		 987s C2404 (987s Clover Bar) Cloverbar S/S C2404 bay outage  
ALTALINK 10-May-24 07:00 10-May-24 12:00 5 Hours
Continuous		 484s 138kV Bus (484s Millar Western), 484s 825 (484s Millar Western), 484s T1 (484s Millar Western), 484s T2 (484s Millar Western), 484s T3 (484s Millar Western), 825L (77s Sagitawah - 484s Millar Western) Replace T2 protections and perform trip testing to 484s825, 484s13, 484s23, & 484s33. Install 484s825 capacitor mounting kit. Repair T1 LTC leaks.  
ATCO 11-May-24 08:00 11-May-24 17:00 9 Hours
Continuous		 7L10 (754s Ksituan River - 7LA10 tap), 7L10 tap, 7L10 (730s Rycroft - 7LA10 tap), 7LA10 (2033s Mowat - 7L10 tap) Disconnect existing, string, and terminate new 7L10 line section (~400m line move to allow for roadway RR54 expansion).  
ALTALINK, EPCOR 12-May-24 07:00 12-May-24 17:00 10 Hours
Continuous		 1056L (89s Ellerslie - 629s Argyll Transfer Station) 1056L: Aerial Washing Program  
ALTALINK, EPCOR 12-May-24 07:00 12-May-24 17:00 10 Hours
Daily		 1056L (89s Ellerslie - 629s Argyll Transfer Station) 1056L: Aerial Washing Program  
EPCOR 13-May-24 07:00 14-May-24 17:00 1.42 Days
Continuous		 330p 1205 (330p Genesee) Genesee 1205 Breaker CT frame protection removal  
EPCOR 13-May-24 07:00 17-May-24 17:00 4.42 Days
Continuous		 557s T2 (557s Castle Downs), 557s CD2403 (557s Castle Downs), 557s CD2404 (557s Castle Downs) Castledowns: TX2 Zone P&C Maintenance  
EPCOR 13-May-24 07:00 21-Jun-24 17:00 39.42 Days
Continuous		 805s T3 (805s Jasper) Jasper TX3 Tap Changer Rebuild w/Hitachi and Oil Processing w/Stark  
ENMAX 13-May-24 08:00 14-May-24 16:00 1.33 Days
Continuous		 162B240-RB136 (SS-162) 162B240-RB136 - Near pole leaking piping. Breaker Dashpot Checks - 162B240-RB136  
ATCO 13-May-24 09:00 17-May-24 17:30 4.35 Days
Continuous		 700s 704 (700s Bonnyville), 7L146 (700s Bonnyville - 970s Bourque) HPL Breaker 704 Complete testing
Replace Densimeter Covers		  
ALTALINK 13-May-24 12:00 16-May-24 17:30 3.23 Days
Continuous		 254s T2 (254s Coaldale) 254sT2 Leaks/ Maintenance.  
ALTALINK 13-May-24 13:00 16-May-24 17:30 3.19 Days
Continuous		 289s T2 (289s Saunders Lake) Doble, Maintenance, IDD monitor  
ALTALINK 15-May-24 08:00 16-May-24 12:30 28.5 Hours
Continuous		 763AL (447s Enchant - 763A1L tap), 763AL (763AL tap - 763A1L tap) Outage needed to lower wire on 763AL151A/ 763A1L0. Trip test 138kV breaker from ACC supervisory circuit  
ALTALINK 15-May-24 09:00 15-May-24 16:00 7 Hours
Daily		 602s 847 (602s Cold Creek), 847L (602s Cold Creek - 847AL tap) 1st trip and PRC 5 maintenance, replace SF6 gauge  
ENMAX 16-May-24 08:00 16-May-24 11:00 3 Hours
Continuous		 162B240-RB133 (SS-162) HV Breaker SF6 Gas Sample - 162B240-RB133  
BCH 16-May-24 08:00 17-May-24 16:00 1.33 Days
Continuous		 5L75 (BCH Ashton Creek - BCH Revelstoke G.S.) replace badly flashed and broken insulators AB-BC
ENMAX 16-May-24 11:00 16-May-24 13:00 2 Hours
Continuous		 162B240-RB131 (SS-162) HV Breaker SF6 Gas Sample - 162B240-RB131  
ENMAX 16-May-24 13:00 16-May-24 16:00 3 Hours
Continuous		 162B240-RB134 (SS-162) HV Breaker SF6 Gas Sample - 162B240-RB134  
ATCO, CNRL 17-May-24 07:30 29-May-24 18:00 12.44 Days
Continuous		 838s 75-TR-2701 (838s Horizon Mining), 838s 75-TR-2801 (838s Horizon Mining), 842s 75-1903 (842s Horizon Upgrading), 842s 75-TR-4701 (842s Horizon Upgrading), 842s 75-TR-7701 (842s Horizon Upgrading) 5YR PMS and Protective relay Upgrades  
ALTALINK 17-May-24 08:00 18-May-24 17:00 1.38 Days
Continuous		 777L (48s Pocaterra - 245s Seebe) Replace DE insulators at 777L245s Seebe West Side South Bay. Install new downleads on poles at structures 24, 25, 27 & 230. AB-BC
ATCO, CNRL 17-May-24 08:00 11-Jun-24 18:00 25.42 Days
Continuous		 838s RTU/SCADA (838s Horizon Mining), 842s RTU/SCADA (842s Horizon Upgrading) RTU Updates for Protective Relay Upgrades. Multiple 15-minute SCADA data loss of visibility, taken as required. Can restore visibility upon request..  
ALTALINK 19-May-24 08:00 19-May-24 15:00 7 Hours
Daily		 887L (48s Pocaterra - 978s BCH Britt Creek) installed downlead on both poles at structure 5 AB-BC
BCH 19-May-24 08:00 19-May-24 15:00 7 Hours
Continuous		 1L274 (48s Pocaterra - 978s BCH Britt Creek) installed downlead on both poles at structure 5 AB-BC
EPCOR 20-May-24 07:00 23-May-24 17:00 3.42 Days
Continuous		 987s T1 (987s Clover Bar) Clover bar: TX1 VRR Upgrade  
ALTALINK 20-May-24 07:00 26-May-24 17:00 6.42 Days
Continuous		 503L (268s Whitecourt - 323s Whitecourt Power) maintenance  
EPCOR 21-May-24 07:00 26-May-24 17:00 5.42 Days
Continuous		 557s T1 (557s Castle Downs), 557s CD2401 (557s Castle Downs), 557s CD2406 (557s Castle Downs) Castledowns: TX1 Doble/Leak Repair and CDAB1, CDDS1, CDDS12 Disconnect Maintenance and TX1, CD2401, CD2406 P&C Maintenance  
ALTALINK, EPCOR 21-May-24 07:00 31-May-24 17:00 10.42 Days
Continuous		 908L (89s Ellerslie - 816s Petrolia), 1044L (EP 805s Jasper - 816s Petrolia) Petrolia: P2406 Breaker LCR  
EPCOR 21-May-24 07:00 21-Jun-24 17:00 31.42 Days
Continuous		 816s P2403 (816s Petrolia) Petrolia: P2403 Breaker LCR  
ALTALINK 21-May-24 08:30 23-May-24 16:30 2.33 Days
Continuous		 28s 44 (28s West Brooks), 28s R1 (28s West Brooks) 28s44 First trip  
BCH 21-May-24 09:00 23-May-24 17:00 2.33 Days
Continuous		 5L76 (BCH Ashton Creek - BCH Nicola) replace badly flashed and broken insulators AB-BC
BCH 21-May-24 09:00 24-May-24 17:00 3.33 Days
Continuous		 5L96 (BCH Selkirk - BCH Vaseux Lake) replace badly flashed and broken insulators AB-BC
ATCO 21-May-24 09:00 27-May-24 16:00 6.29 Days
Continuous		 7L32 (813s Little Smoky - 862s South Bezanson) Pole replacement from Test and Treat  
ALTALINK 21-May-24 13:30 13-Jun-24 17:30 23.17 Days
Continuous		 12s T1 (12s Heartland) T1-A(TX18825) Internal Inspection, hotspot repair (12s3689), breaker maintenance (12s1752)  
ALTALINK 22-May-24 08:00 23-May-24 17:00 1.38 Days
Continuous		 507L (83s Taber - 257s Hull) Replace OHSW assembly at structures 3 & 4. Replace structure 22.  
BCH 22-May-24 09:00 24-May-24 17:00 2.33 Days
Continuous		 2L294 (BCH A. A. Lambert - BCH Cranbrook), T3 (BCH Cranbrook), T7 (BCH Cranbrook) 2D2CB7/2D1CB8/ 2D3/ 2CVT4 inspection BC maintenance does not affect the Alberta ATC AB-BC
SUNCOR 22-May-24 09:00 29-May-24 16:00 7.29 Days
Continuous		 29EDD-1 T2 (29EDD-1 Millennium) BP-29EDD-1 - TA - T2 OLTC Maintenance and Testing  
ATCO, AIRLIQUIDE 23-May-24 09:00 23-May-24 16:00 7 Hours
Continuous		 ALC03L (402s Scotford Expansion One - 408s Air Liquide Scotford) Clean contaminated insulators next to the cooling plant structures 8-15  
EPCOR 25-May-24 07:00 31-May-24 17:00 6.42 Days
Continuous		 987s GT1 (987s Clover Bar) Spring Outage  
ENMAX, ALTALINK 26-May-24 08:00 26-May-24 16:00 8 Hours
Continuous		 7.82L (42s Sarcee - SS-7), 7B138-7.82 (SS-7) HV Breaker Maintenance - 7B138-7.82. HV Breaker SF6 Gas Sample - 7B138-7.82  
ALTALINK 27-May-24 07:00 28-May-24 18:00 1.46 Days
Continuous		 916L (5s East Calgary - 42s Sarcee) Arctic arrow requires a GOI on 916L42 for a LCM project. Arctic Arrow will install phase raisers on bottom phase. See also 289330 833L (C2s-C12s) - RB Required due to proximity  
EPCOR 27-May-24 07:00 30-May-24 17:00 3.42 Days
Continuous		 987s T2 (987s Clover Bar) Clover bar: TX2 VRR Upgrade  
ALTALINK, EPCOR 27-May-24 07:00 07-Jun-24 17:00 11.42 Days
Continuous		 1059L (38s East Edmonton - 1059AL tap) EPCOR request for work at East industrial & Lambton  
EPCOR, ALTALINK 27-May-24 07:00 07-Jun-24 17:00 11.42 Days
Continuous		 1059AL (52s East Industrial - 1059L tap), 1059L (38s East Edmonton - 1059AL tap), 1059L (EP 803s Lambton - 1059AL tap), EP 803s L2404 (EP 803s Lambton), EP 803s L2401 (EP 803s Lambton), 52s T1 (52s East Industrial), 52s E2401 (52s East Industrial) 1059L Zones: E2401 (Min Oil), L2404 (Min Oil), L2403 (SF6) Breaker Maintenance, L2404 CT Doble, LDS1 Disconnect Maintenance and 1059L and L2401, L2404 P&C Maintenance  
BCH 27-May-24 09:00 29-May-24 17:00 2.33 Days
Continuous		 5L79 (BCH Ashton Creek - BCH Nicola) replace badly flashed and broken insulators
AB-BC
ATCO 27-May-24 10:00 10-Jun-24 16:00 14.25 Days
Continuous		 9L16 (755s Cordel - 972s Tinchebray) Upgrade 9L16 21A and 21B relays at both 755S Cordel and 972S Tinchebray.
Connect new 9LA16 to new 620S Goldeye substation		  
ALTALINK 27-May-24 14:00 30-May-24 17:00 3.13 Days
Continuous		 367s T2 (367S Harry Smith) PRC005 Doble, maintenance  
ALTALINK 28-May-24 08:00 29-May-24 12:00 28 Hours
Continuous		 245s 777X (245s Seebe), 777L (48s Pocaterra - 245s Seebe) 245s777X 1st trip followed by PRC5 brk. Maintenance AB-BC
ALTALINK 28-May-24 23:00 30-May-24 07:00 1.33 Days
Continuous		 250p 11 (250p Bighorn Plant) maintenance  
ENMAX, ALTALINK 29-May-24 06:00 30-May-24 18:00 1.5 Days
Continuous		 833L (SS-2 - SS-12) Arctic arrow requires a GOI on 833L14 for a LCM project. Arctic Arrow will install phase raisers on bottom phase. See also 289331 916L (5s-42s) RB required due to proximity  
ENMAX, ALTALINK 29-May-24 06:00 30-May-24 18:00 1.5 Days
Continuous		 833L (SS-2 - SS-12) Altalink outage. Arctic arrow requires a GOI on 833L14 for a LCM project. Arctic Arrow will install phase raisers on bottom phase  
ALTALINK 29-May-24 07:00 30-May-24 07:00 24 Hours
Continuous		 250p 22 (250p Bighorn Plant) maintenance  
ATCO, CNRL 30-May-24 07:30 11-Jun-24 18:00 12.44 Days
Continuous		 838s 75-TR-1701 (838s Horizon Mining), 838s 75-TR-1801 (838s Horizon Mining), 842s 75-TR-8701 (842s Horizon Upgrading), 842s 75-TR-5701 (842s Horizon Upgrading), 842s 75-1904 (842s Horizon Upgrading) 5YR PMs and Protective Relay Upgrades  
BCH 30-May-24 08:00 31-May-24 16:00 1.33 Days
Continuous		 5L77 (BCH Ashton Creek - BCH Revelstoke G.S.) replace badly flashed and broken insulators AB-BC
ALTALINK 31-May-24 08:00 03-Jun-24 17:00 3.38 Days
Continuous		 733L (179s Gleichen - 428s Namaka) Replace crossarms and insulators at structures 250, 251, 252, 264 & 265 Bond OHSW at structure 272. 2nd Scope: Line post install at str 202 & 203  
ENMAX, ALTALINK 01-Jun-24 08:00 01-Jun-24 12:00 4 Hours
Continuous		 24.81L (SS-24 - SS-31), 24.83L (74s Janet - SS-24), 24.1TR (SS-24), 24B138-24BT3 (SS-24) Summer Substation Washing  
ENMAX, ALTALINK 01-Jun-24 08:00 01-Jun-24 12:00 4 Hours
Daily		 24.83L (74s Janet - SS-24) Summer Substation Washing  
EPCOR 03-Jun-24 07:00 09-Jun-24 17:00 6.42 Days
Continuous		 987s GT2 (987s Clover Bar) Summer Outage  
ALTALINK 03-Jun-24 07:30 06-Jun-24 16:30 3.38 Days
Continuous		 AML 511s T30 (AML 511s Crossings), AML 511s SVC Plus (AML 511s Crossings) ACF14 and SVC+ Inspection & Maintenance.  
ENMAX, ALTALINK 03-Jun-24 08:00 03-Jun-24 09:00 60 Mins
Daily		 5s T1 (5s East Calgary) Summer Substation Washing  
ATCO 03-Jun-24 08:00 07-Jun-24 17:30 4.4 Days
Continuous		 12L41 (510s Sunnybrook - 939s Livock), 12L44 (939s Livock - 951s Thickwood Hills) APL O&M outage

Use 2-70262 for 12L44 GOI
Use 2-70263 for 939s-APL GOI
Use 2-70264 for 951s-APL GOI
APL O&M outage

Use 2-70262 for 12L44 GOI
Use 2-70263 for 939s-APL GOI
Use 2-70264 for 951s-APL GOI		  
ATCO 03-Jun-24 08:00 14-Jun-24 16:00 11.33 Days
Continuous		 2075s 901T (2075s Newell), 2075s ACF11 (2075s Newell), 2075s ACF12 (2075s Newell), 2075s ACF13 (2075s Newell), 2075s ACF14 (2075s Newell) FILTER BANK AC MAINTENANCE @ NEWELL 2075S ACF12, 2075S ACF13, & 2075S ACF14
SVC Maintenance 2075S SVC1
Install Green Guard (Bird Mitigation) on 2075S 901T		  
ATCO, ALTALINK 03-Jun-24 08:00 14-Jun-24 17:30 11.4 Days
Continuous		 1241L (510s Sunnybrook - 939s Livock) ATCO work  
ENMAX, ALTALINK 03-Jun-24 09:00 03-Jun-24 10:00 60 Mins
Continuous		 5s T1 (5s East Calgary) Summer Substation Washing  
ATCO 03-Jun-24 09:00 10-Jun-24 16:00 7.29 Days
Continuous		 7L32 (813s Little Smoky - 862s South Bezanson) Pole replacement from Test and Treat  
ENMAX, ALTALINK 03-Jun-24 09:01 03-Jun-24 10:00 59 Mins
Daily		 5s T2 (5s East Calgary) Summer Substation Washing  
ATCO 03-Jun-24 09:30 06-Jun-24 17:00 3.31 Days
Continuous		 772s 601T (772s Youngstown) 601T TRANSFORMER CLASS2 MAJOR TESTING  
ENMAX, ALTALINK 03-Jun-24 10:00 03-Jun-24 11:00 60 Mins
Continuous		 5s T2 (5s East Calgary) Summer Substation Washing  
ATCO 03-Jun-24 10:00 18-Jun-24 12:00 15.08 Days
Continuous		 730s STATCOM (730s Rycroft) - SVC ANNUAL INSPECTION @ RYCROFT 730S
- SVC FIRE SYSTEM INSPECTION @ RYCROFT 730S		  
ALTALINK 03-Jun-24 13:30 08-Jun-24 17:00 5.15 Days
Continuous		 74s T2 (74s Janet) 74sT2 doble, maint, leaks.  
SUNCOR 04-Jun-24 08:00 18-Jun-24 18:00 14.42 Days
Continuous		 29PL6-22 (29EDD-1 Millennium - 29EDD-2 Tar Island), 29EDD-2 29PT-3 (29EDD-2 Tar Island) isolation and PM and corrective on 29PP-1/2 buses. for this isolation there will be momentary loss during switching once for PL6-32 once the ring bus is closed this will come back online.  
ALTALINK 04-Jun-24 08:30 06-Jun-24 16:30 2.33 Days
Continuous		 59s 452 (59s Peigan) 59s452 density gauge, counter and maint.  
ENMAX 04-Jun-24 09:00 04-Jun-24 10:00 60 Mins
Continuous		 35.81L (42s Sarcee - SS-35) Summer Substation Washing  
ALTALINK 04-Jun-24 09:00 04-Jun-24 10:00 60 Mins
Daily		 42s 35 (42s Sarcee) Summer Substation Washing  
BCH 04-Jun-24 09:00 14-Jun-24 17:00 10.33 Days
Continuous		 T3 (BCH Natal) NTL Station Rebuild. T3 OOS for PN replacement AB-BC
ATCO 04-Jun-24 16:00 04-Jun-24 20:00 4 Hours
Continuous		 951S 901 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
EPCOR 05-Jun-24 07:00 09-Jun-24 17:00 4.42 Days
Continuous		 987s GT3 (987s Clover Bar) Summer Outage  
ATCO 05-Jun-24 08:00 05-Jun-24 12:00 4 Hours
Continuous		 951S 904 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
ATCO 05-Jun-24 12:00 05-Jun-24 16:00 4 Hours
Continuous		 951S 907 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
ALTALINK, ENEL 07-Jun-24 07:30 08-Jun-24 16:00 1.35 Days
Continuous		 205s T2 (205s Castle Rock Ridge) Customer annual substation work  
BCH 07-Jun-24 10:00 14-Jun-24 18:00 7.33 Days
Continuous		 5L71 (BCH Mica G.S. - BCH Nicola) MCA Controls Upgrade Project with 5L71 OOS AB-BC
ALTALINK 10-Jun-24 07:00 12-Jun-24 17:30 2.44 Days
Continuous		 326s 240kV Bus 2 (326s Murray lake) Installing SS1 and transfer switch  
ALTALINK 10-Jun-24 07:30 14-Jun-24 16:30 4.38 Days
Continuous		 AML 511s 240kV ACF 2 Bus (511s Crossings), AML 511s ACF21 (AML 511s Crossings), AML 511s ACF22 (AML 511s Crossings) Annual ACF 21, 22 Inspections, Bird Mitigation on Reactors in Filter  
CNRL, ATCO 10-Jun-24 08:00 17-Jun-24 07:00 6.96 Days
Continuous		 859s 52G (859s Primrose), 859s 701T (859s Primrose), 859s Protection & Control (859s Primrose)
701T will be isolated to start work on 25kV switchgear project - 501TD will be left open after the outage.
70T1 XFMR Diff relay and 144kV overcurrent relay will have settings changes for PRC-025 compliance. 		 
ATCO 10-Jun-24 09:30 13-Jun-24 16:00 3.27 Days
Continuous		 7LA53 (969s Lindbergh - 7L53 tap), 969s 701T (969s Lindbergh), 969s 501 (969s Lindbergh) 701T Maintenance, 701 Maintenance, and leak repairs
301 Close latch repairs
Customer Outage required. Temp station service Required		  
ATCO 10-Jun-24 10:00 12-Jun-24 16:00 2.25 Days
Continuous		 959s 901T (959s Lanfine) PRC-005 - SPR TESTING - TRANSFORMER 901T @ 959S
RTXP Test Switch Mitigation and Replacement: 87TA/901T @ 959S		  
ATCO 10-Jun-24 10:00 21-Jun-24 17:30 11.31 Days
Continuous		 786s SVC (786s High Level), 786s 703T (786s High Level), 786s 703 (786s High Level) - 703T Leak Repair Check up
- 703T Remediation, Civil work, and Containment Installation		  
ATCO 11-Jun-24 08:00 11-Jun-24 18:30 10.5 Hours
Continuous		 863s 901 (863s Paintearth) Remove old transformer protection trips from 901 breaker trip circuit and commission.  
ALTALINK 11-Jun-24 08:00 13-Jun-24 16:00 2.33 Days
Continuous		 163s 1552 (163s Amoco Empress), 163s 1252 (163s Amoco Empress), 163s T1 (163s Amoco Empress), 163s T5 (163s Amoco Empress) Connect CTs, test trip, for 1004s Bullseye project. Replace SS1.  
BCH 11-Jun-24 08:00 13-Jun-24 16:00 2.33 Days
Continuous		 5L71 (BCH Mica G.S. - BCH Nicola) repair badly damaged conductor AB-BC
ATCO 11-Jun-24 08:00 21-Jun-24 10:01 10.08 Days
Continuous		 788S 701T, 788s 701T (788s Hotchkiss) Remove 701TCS, add NEW 707 breaker and switch 707A. Add NEW 701T  
ATCO 11-Jun-24 08:30 11-Jun-24 16:30 8 Hours
Continuous		 7L65 tap, 7L65 (709s Vegreville - 7LA65 tap), 7L65 (710s Vermilion - 7LA65 tap), 7LA65 (708s Grizzly Bear - 7L65 tap) Replace Damaged 7LA65D1 switch vacuum bottles. Full Line Outage on 7L65 required.
Inspect and make adjustments to 7LA65D1, 7L65D2, 7L65D3		  
ALTALINK 11-Jun-24 08:30 12-Jun-24 16:30 1.33 Days
Daily		 59s 352 (59s Peigan) Maint. and gauge replacement  
ATCO 11-Jun-24 10:00 11-Jun-24 13:00 3 Hours
Continuous		 853s 704 (853s Ring Creek), 7L113 (853s Ring Creek - 930s Arcenciel) PRC-005 - TRIP COIL TESTING - BREAKER 704 @ 853S  
ATCO 11-Jun-24 13:00 11-Jun-24 17:30 4.5 Hours
Continuous		 853s 703 (853s Ring Creek), 7L82 (853s Ring Creek - 855s Hamburg) PRC-005 - TRIP COIL TESTING - BREAKER 703 @ 853S  
ALTALINK 12-Jun-24 07:00 14-Jun-24 18:00 2.46 Days
Continuous		 603L (138s Windy Flats - 243s Soderglen) Maint. 603L between Structures #1 - 109  
ATCO 12-Jun-24 08:00 12-Jun-24 18:30 10.5 Hours
Continuous		 863s 902 (863s Paintearth) Remove old transformer protection trips from 902 breaker trip circuit and commission.  
SUNCOR 12-Jun-24 08:00 25-Jun-24 16:00 13.33 Days
Continuous		 29EDD-1 T1 (29EDD-1 Millennium) BP - 29EDD-1 T1 Bushings; 72kv Arresters Replacement; 29EDD1S1052 Densimeter Replacement; 29EDD1S852 Replace Densimeter; OLTC Maintenance and Testing  
ALTALINK 12-Jun-24 10:30 12-Jun-24 13:00 2.5 Hours
Daily		 504s 853E (504s Queenstown), 504s 161 (504s Queenstown) Outage to cutover LTO for AIS relays.  
ALTALINK 12-Jun-24 16:31 13-Jun-24 16:00 23.48 Hours
Continuous		 749L (899s Edgerton - 7LB749 tap) Climbing Inspection 7L749 Between 7L749D3 (7LB749 tap) and AltaLink Tie  
ALTALINK 12-Jun-24 23:00 13-Jun-24 03:00 4 Hours
Daily		 62s 11 (62s Brazeau Plant) maintenance  
ALTALINK 13-Jun-24 03:00 13-Jun-24 07:00 4 Hours
Daily		 62s 12 (62s Brazeau Plant) maintenance  
ALTALINK 14-Jun-24 08:00 16-Jun-24 17:00 2.38 Days
Continuous		 163s T2 (163s Amoco Empress) Replace SS2, and lightning arresters.  
BCH 16-Jun-24 08:00 16-Jun-24 20:00 12 Hours
Continuous		 5L71 (BCH Mica G.S. - BCH Nicola), 5L72 (BCH Mica G.S. - BCH Nicola) MCA Fire Water Header Project (GM-0386) AB-BC
EPCOR 17-Jun-24 07:00 17-Jun-24 17:00 10 Hours
Continuous		 330p 1207 (330p Genesee) Genesee: 1207 P&C Maintenance  
EPCOR 17-Jun-24 07:00 21-Jun-24 17:00 4.42 Days
Continuous		 1098L (EP 805s Jasper - Poundmaker), EP 805s J2401 (EP 805s Jasper), EP 805s J2407 (EP 805s Jasper) Jasper: JDS1 LCR  
EPCOR 17-Jun-24 07:00 21-Jun-24 17:00 4.42 Days
Continuous		 1164L (816s Petrolia - EP Riverview), RW2401 (EP Riverview), RW2402 (EP Riverview) Riverview: 1164L Zone Doble and RWDS11, RWDS2, RWDS3 Disconnect Maintenance  
ATCO 17-Jun-24 08:00 21-Jun-24 16:00 4.33 Days
Continuous		 2075s ACF22 (2075s Newell), 2075s ACF23 (2075s Newell), 2075s ACF24 (2075s Newell) FILTER BANK AC MAINTENANCE @ NEWELL 2075S ACF22, 2075S ACF23, & 2075S ACF24  
ATCO 17-Jun-24 09:30 17-Jun-24 17:30 8 Hours
Continuous		 811s 710 (811s Clairmont Lake), 7L32 (811s Clairmont Lake - 862s South Bezanson) PRC-005 - TRIP COIL TESTING - BREAKER 710 @ 811S  
ATCO 17-Jun-24 09:30 21-Jun-24 17:30 4.33 Days
Continuous		 2029s 1202 (2029s Heathfield), 2029s 1203 (2029s Heathfield), 12L70 (12s Heartland - 2029s Heathfield) PRC-005 - TRIP COIL TESTING - BREAKER 1202 @ 2029S
PRC-005 - TRIP COIL TESTING - BREAKER 1203 @ 2029S
PRC-005 - RELAY TESTING - MULTIPLE DEVICES RELATED TO 12L70 AND BREAKERS 1202 & 1203		  
ALTALINK 17-Jun-24 09:30 21-Jun-24 18:00 4.35 Days
Continuous		 180L (255s Vulcan - 928s East Stavely), 255s T2 (255s Vulcan) Cutover CT circuits to new Bus 2 ‘B’ protection relay and test trips to breaker. Cutover 180L LTO statuses to AIS relay. Replace s34 (452) C60, test trip BF outputs.  
ATCO 17-Jun-24 10:00 20-Jun-24 16:00 3.25 Days
Continuous		 7L50 (757s Battle River - 491L tap) 7L50 Pole and arm replacement  
EPCOR 18-Jun-24 07:00 18-Jun-24 17:00 10 Hours
Continuous		 330p 1208 (330p Genesee) Genesee: 1208 P&C Maintenance  
ALTALINK 18-Jun-24 07:00 19-Jun-24 18:00 1.46 Days
Continuous		 787L (71s Lamoureux - 787AL tap) Repair downlead at structure 9 & 22. Retie OHSW at structure 15 & 20. Replace insulators at structure 20. Replace arms and insulators with line post insulators at structure 14.  
ALTALINK 18-Jun-24 08:00 19-Jun-24 11:00 27 Hours
Continuous		 264s 240kV Bus 1 (264s Elkwater) Remove riser from low bus to high bus and install new design with rigid bus in two locations. Lower Voltage tap on SSTX1  
ATCO 18-Jun-24 08:00 24-Jun-24 16:00 6.33 Days
Continuous		 7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
ATCO 18-Jun-24 09:30 18-Jun-24 17:30 8 Hours
Continuous		 811s 709 (811s Clairmont Lake) PRC-005 - TRIP COIL TESTING - BREAKER 709 @ 811S
TCM Program. RTXP Test Switch Mitigation and Replacement: 21A/7L39 @ 811S
TCM Program. RTXP Test Switch Mitigation and Replacement: 21B/7L39 @ 811S		  
ATCO 18-Jun-24 10:00 18-Jun-24 16:00 6 Hours
Continuous		 732s 901 (732s Mitsue) prc-005 trip coil testing  
ALTALINK 19-Jun-24 07:00 19-Jun-24 16:00 9 Hours
Daily		 608L22 (608AL tap) maintenance on 138MDS4 at 528s  
ATCO 19-Jun-24 09:30 20-Jun-24 17:30 1.33 Days
Continuous		 811s 708 (811s Clairmont Lake) PRC-005 - TRIP COIL TESTING - BREAKER 708 @ 811S
TCM Program. RTXP Test Switch Mitigation and Replacement: 21A/7L22 @ 811S
TCM Program. RTXP Test Switch Mitigation and Replacement: 21B/7L22 @ 811S
TCM Program. RTXP Test Switch Mitigation and Replacement: 50BF/708 @ 811S		  
ATCO 19-Jun-24 10:00 19-Jun-24 16:00 6 Hours
Continuous		 732s 903 (732s Mitsue) prc-005 trip coil testing  
ALTALINK 19-Jun-24 12:00 20-Jun-24 18:00 30 Hours
Continuous		 264s 240kV Bus 2 (264s Elkwater) Remove riser from low bus to high bus and install new design with rigid bus in two locations. Lower Voltage tap on SSTX2. Swap Gas density monitors on Breaker 352  
ALTALINK 20-Jun-24 07:00 20-Jun-24 18:00 11 Hours
Continuous		 707L (54s Fort Saskatchewan - 166s Dow Chemical Fort Saskatchewan) Hardware tighten structure 20. Install new ground rod and repair downlead at structure 21. Re-tie OHSW at structure
33.
  
ALTALINK 20-Jun-24 07:00 26-Jun-24 17:00 6.42 Days
Continuous		 74s T2 (74s Janet) Upgrade Transformer Protection Relays,Upgrade Breaker Fail Relay for 74s77. Modify Existing CT connections.  
ENMAX, ALTALINK 20-Jun-24 08:00 23-Jun-24 16:00 3.33 Days
Continuous		 936L (5s East Calgary - 102s Langdon) Tower climbing and corrosion inspection  
ENMAX, ALTALINK 20-Jun-24 08:00 23-Jun-24 16:00 3.33 Days
Continuous		 937L (5s East Calgary - 102s Langdon) Tower climbing and corrosion inspection  
ALTALINK 20-Jun-24 09:00 20-Jun-24 17:00 8 Hours
Daily		 108s T2 (108s Amelia), 108s 452 (108s Amelia), 108s 352 (108s Amelia) VT4 Sample oil, test CVT and lower oil in CVT head.  
ATCO 20-Jun-24 10:00 20-Jun-24 16:00 6 Hours
Continuous		 732s 904 (732s Mitsue) prc-005 trip coil testing  
ALTALINK, TRANSALTA 20-Jun-24 10:30 24-Jun-24 17:00 4.27 Days
Continuous		 59s T1 (59s Peigan), 616L (59s Peigan - 616AL tap) Demo/Remove 59s11 and 59s8 and convert into bus support structures.  
ATCO, ALTALINK 22-Jun-24 08:00 27-Jun-24 17:30 5.4 Days
Continuous		 7L50 (757s Battle River - 491L tap), 7L50 (526s Buffalo Creek - 491L tap) AltaLink request for Advice for 252s Station (408L, 491L) GOI  
ALTALINK, ENMAX 23-Jun-24 07:00 23-Jun-24 12:00 5 Hours
Daily		 74s 24.83X (74s Janet), 24.83L (74s Janet - SS-24) Trip Testing 74s24.83X from new 74s77 Breaker Fail Relay  
ALTALINK 23-Jun-24 10:00 26-Jun-24 17:00 3.29 Days
Continuous		 725L (674s Bowron - 725BL tap), 725L (15s Fort MacLeod - 725BL tap), 725BL (240s McBride Lake - 725L tap) Replace crossarms and insulators with line post insulators at structures 2, 162, 163 233 & 234. Replace H-Frame double dead-end crossarm and insulators at structure 147. Replace arms and insulators at structures 231, 232 & 262. Install ground rod and repair downlead at structure 223.  
ALTALINK, ENMAX 23-Jun-24 12:00 23-Jun-24 17:00 5 Hours
Daily		 74s 23.80W (74s Janet), 23.80L (74s Janet - SS-23) Trip Testing 74s24.80 from new 74s77 Breaker Fail Relay  
EPCOR 24-Jun-24 07:00 30-Jun-24 17:00 6.42 Days
Continuous		 T1 (EP Riverview), RW2405 (EP Riverview), RW2401 (EP Riverview) Riverview: TX1 Doble and RWAB1, RWDS1, RWDS10 Disconnect Maintenance  
ATCO 24-Jun-24 08:00 28-Jun-24 16:00 4.33 Days
Continuous		 2075s 902T (2075s Newell) ANNUAL SVC MAINTENANCE @ NEWELL 2075S SVC 2  
ALTALINK 24-Jun-24 09:30 24-Jun-24 17:00 7.5 Hours
Daily		 74s C3 (74s Janet), 74s C4 (74s Janet), 74s 104 (74s Janet) Trip Testing from new T2 Protections, Breaker Fail Initiate from T2 Protections, Block Close Testing from T2, & Protections Trip Testing from new 74s77 Breaker Fail Relay  
ATCO 24-Jun-24 09:30 28-Jun-24 17:30 4.33 Days
Continuous		 12L85 (12s Heartland - 2029s Heathfield) PRC-005 - TRIP COIL TESTING - BREAKER 1207 @ 2029S
PRC-005 - TRIP COIL TESTING - BREAKER 1208 @ 2029S
PRC-005 - PROTECTION TESTING - MULTIPLE DEVICES RELATED TO 12L85 AND BREAKERS 1207 & 1208		  
ALTALINK, EPCOR 24-Jun-24 09:30 05-Jul-24 17:00 11.31 Days
Continuous		 1044L (EP 805s Jasper - 816s Petrolia), 908L (89s Ellerslie - 816s Petrolia), 816s P2401 (816s Petrolia), 816s P2405 (816s Petrolia), 816s P2406 (816s Petrolia) Petrolia: P2406 Breaker LCR and 1044L Zone Doble and PDS10, PDS14, PDS15 Disconnect Maintenance  
ALTALINK, EPCOR 24-Jun-24 09:30 05-Jul-24 17:00 11.31 Days
Continuous		 908L (89s Ellerslie - 816s Petrolia) Petrolia: P2406 Breaker LCR and 1044L Zone Doble and PDS10, PDS14, PDS15 Disconnect Maintenance  
ALTALINK 24-Jun-24 10:00 24-Jun-24 12:00 2 Hours
Daily		 74s 352 (74s Janet) Trip Testing from new T2 Protections,Breaker Fail Initiate from T2 Protections,Block Close Testing from T2 Protections, & Trip Testing from new 74s77 Breaker Fail Relay  
ATCO 24-Jun-24 10:00 27-Jun-24 16:00 3.25 Days
Continuous		 7L50 (757s Battle River - 491L tap) 7L50 Pole and arm replacement  
ALTALINK 24-Jun-24 12:30 28-Jun-24 12:30 4 Days
Continuous		 650s SVC (650s Hansman Lake) SVC resistor replacement, maintenance  
ALTALINK 25-Jun-24 07:00 25-Jun-24 12:00 5 Hours
Daily		 74s 2252 (74s Janet) Trip Testing from new T2 Protections,Breaker Fail Initiate from T2 Protections,Block Close Testing from T2 Protections, & Trip Testing from new 74s77 Breaker Fail Relay  
ATCO 25-Jun-24 10:00 25-Jun-24 16:00 6 Hours
Continuous		 957s 901 (957s McClelland) prc-005 trip coil testing,  
ALTALINK 25-Jun-24 12:00 25-Jun-24 17:00 5 Hours
Daily		 74s 2352 (74s Janet) Trip Testing from new T2 Protections,Breaker Fail Initiate from T2 Protections,Block Close Testing from T2 Protections, & Trip Testing from new 74s77 Breaker Fail Relay  
ALTALINK 26-Jun-24 07:00 26-Jun-24 12:00 5 Hours
Daily		 74s 2852 (74s Janet) Trip Testing from new T2 Protections,Breaker Fail Initiate from T2 Protections,Block Close Testing from T2 Protections, & Trip Testing from new 74s77 Breaker Fail Relay  
ATCO 26-Jun-24 09:30 27-Jun-24 17:30 1.33 Days
Continuous		 811s 707 (811s Clairmont Lake) BREAKER 707 MIN OIL HLR PARTIAL TESTING at 811s Clairmont  
ATCO 26-Jun-24 09:30 28-Jun-24 17:30 2.33 Days
Continuous		 834s 901T (834s Wesley Creek) PRC-005 - SPR TESTING - TRANSFORMER 901T @ 834S
TRANSFORMER CLASS1 MAJOR TESTING - 901T @ 834S
TCM Program. RTXP Test Switch Mitigation and Replacement: 87TA/901T @ 834S
TCM Program. RTXP Test Switch Mitigation and Replacement: 87TB/901T @ 834S		  
ATCO 26-Jun-24 10:00 26-Jun-24 16:00 6 Hours
Continuous		 957s 902 (957s McClelland) prc-005 trip coil testing,  
ALTALINK 26-Jun-24 12:00 26-Jun-24 17:00 5 Hours
Daily		 74s 3852 (74s Janet) Trip Testing from new T2 Protections,Breaker Fail Initiate from T2 Protections,Block Close Testing from T2 Protections, & Trip Testing from new 74s77 Breaker Fail Relay  
ATCO 27-Jun-24 10:00 27-Jun-24 16:00 6 Hours
Continuous		 957s 903 (957s McClelland) prc-005 trip coil testing,  
ATCO 29-Jun-24 08:00 01-Jul-24 17:00 2.38 Days
Continuous		 9L912 (63s Red Deer - 766s Nevis) Repair switch 9L912D1  
ALTALINK 29-Jun-24 08:00 01-Jul-24 17:00 2.38 Days
Continuous		 912L (63s Red Deer - 766s Nevis) Repair switch 9L912D1  
SUNCOR 01-Jul-24 08:00 07-Jul-24 16:00 6.33 Days
Continuous		 29EDD-1 29EDD1s1252 (29EDD-1 Millennium) BP - 29EDD1;29CVT-2 SYSTEM;PM 5y,10y; 29EDD1S252 Breaker
  
EPCOR 02-Jul-24 07:00 14-Jul-24 17:00 12.42 Days
Continuous		 CV5 (EP 511s Victoria - 557s Castle Downs), EP 511s Victoria T5 (EP 511s Victoria), EP 511s V2401 (EP 511s Victoria), 557s CD2405 (557s Castle Downs), 557s CD2406 (557s Castle Downs) CV5: Manhole Inspections and Victoria TX5 Zone Doble, VDS25, CDDS16, CDDS11, CDDS10 Disconnect Maintenance and CD2405 P&C Maintenance  
ATCO 02-Jul-24 08:30 04-Jul-24 17:00 2.35 Days
Continuous		 802s 704 (802s Michichi Creek), 7L128 (802s Michichi Creek - 7LA128 tap) BREAKER 704 MIN OIL HLR COMPLETE TESTING  
BCH 02-Jul-24 09:00 12-Jul-24 17:00 10.33 Days
Continuous		 T4 (BCH Natal) NTL Station Rebuild. T4 OOS for PN replacement AB-BC
ALTALINK 02-Jul-24 12:00 05-Jul-24 18:00 3.25 Days
Continuous		 701L (223s Strome - 7LA701 tap) 701L CRU & WMP Component Replacement (STR 423 - 449)  
ATCO 02-Jul-24 12:00 05-Jul-24 18:00 3.25 Days
Continuous		 7L701 (757s Battle River - 7LA701 tap) AltaLink Scope: 701L CRU & WMP Component Replacement (STR 423 - 449)  
ALTALINK 02-Jul-24 12:30 11-Jul-24 15:30 9.13 Days
Continuous		 370s T5 (370s North Lethbridge) 370sT5 Maintenance 370s2252 Maint.  
ATCO 03-Jul-24 09:00 08-Sep-24 11:00 67.08 Days
Continuous		 848S 601, 848S 602, 848S 607, 848S 608, 848S 900BS1, 848S 901T, 848s 240kV Bus 900BS1 (848s Ruth Lake), 848s 901T (848s Ruth Lake) 848S Ruth Lake Substation Rebuild: Upgrading protection to IEC 61850, Replace breaker 401. Cut over to new protection, Install oil containment for 901T. Pull all new outdoor cable, modify cable tray, install new cable tray.  
ENMAX, ALTALINK 05-Jul-24 08:00 11-Jul-24 17:00 6.38 Days
Continuous		 50L (44s Bearspaw Plant - SS-21) Repair woodpecker damage at structures 119 & 122. Replace structures 116 & 117.  
EPCOR 05-Jul-24 17:00 26-Jul-24 17:00 21 Days
Continuous		 816s P2406 (816s Petrolia) Petrolia: P2406 Breaker LCR  
ALTALINK 06-Jul-24 07:00 06-Jul-24 18:00 11 Hours
Daily		 409s 110 (409s Shell Scotford) Installation of new 138KV Bus B protection requiring CT contributions from 409s110. Trip testing to 409s110. Add 43M/1052. RSLD 3 to be implemented after outage is complete.  
SUNCOR 06-Jul-24 08:00 18-Jul-24 18:00 12.42 Days
Continuous		 29EDD-65 29-952-4813 (29EDD-65), 29EDD-65 29-952-4823 (29EDD-65), 29EDD-65 260kV Bus 29PP-0049 (29EDD-65) FB-29-952-4813, 4823 5y PM 29PP-49 SYSTEM;PM 5y (46555392, 46555395, 450237141)  
ALTALINK, EPCOR 08-Jul-24 07:00 31-Jul-24 17:00 23.42 Days
Continuous		 1058L (657s Summerside - EP 803s Lambton), EP 803s L2404 (EP 803s Lambton), EP 803s L2403 (EP 803s Lambton) Lambton 1058L: Steel Structure Refurbishment  
ATCO 08-Jul-24 09:00 09-Jul-24 17:00 1.33 Days
Continuous		 849s 902 (849s Joslyn Creek) breaker maintenance  
ATCO 08-Jul-24 09:00 11-Jul-24 16:00 3.29 Days
Continuous		 809s 902T (809s Louise Creek) transformer maintenance  
ATCO 08-Jul-24 09:00 11-Jul-24 16:00 3.29 Days
Continuous		 809s 910 (809s Louise Creek) breaker maintenance  
ATCO 08-Jul-24 09:30 10-Jul-24 10:00 2.02 Days
Continuous		 834s 902T (834s Wesley Creek), 834s 702 (834s Wesley Creek), 834s 703 (834s Wesley Creek), 834s 902 (834s Wesley Creek), 834s 903 (834s Wesley Creek) Test and Repair 902TD and 702TD at 834s Wesley Creek
TCM Program. RTXP Test Switch Mitigation and Replacement: 87TA/902T @ 834S
TCM Program. RTXP Test Switch Mitigation and Replacement: 87TB/902T @ 834S
Release this permit and proceed to 2-82787		  
ATCO 08-Jul-24 09:30 12-Jul-24 17:30 4.33 Days
Continuous		 813s 902T (813s Little Smoky) TRANSFORMER CLASS1 TAP CHANGER - 902T @ 813S
TRANSFORMER 902T CLASS1 MAJOR TESTING		  
ALTALINK 09-Jul-24 07:30 09-Jul-24 13:00 5.5 Hours
Daily		 853L (28s West Brooks - 853AL tap) Test LTO to new AIS relay.  
SUNCOR 09-Jul-24 08:00 16-Jul-24 16:00 7.33 Days
Continuous		 29EDD-94 29PS-393 (29EDD-94 Voyageur) BP - 29EDD-94, 29PS-393 Control Fail Alarm
  
ALTALINK 10-Jul-24 07:30 10-Jul-24 18:00 10.5 Hours
Daily		 172L (254s Coaldale - 370s North Lethbridge) Test LTO to new AIS relay.  
ATCO 10-Jul-24 09:00 11-Jul-24 17:00 1.33 Days
Continuous		 849s 903 (849s Joslyn Creek) breaker maintenance  
ATCO 10-Jul-24 09:30 12-Jul-24 17:30 2.33 Days
Continuous		 834s 902T (834s Wesley Creek) PRC-005 - SPR TESTING - TRANSFORMER 902T @ 834S
902T TRANSFORMER CLASS1 MAJOR TESTING @ 834s Wesley Creek
Reduction from 2-82877 just just include 902T and restore both 240kV/144kV buses		  
CNRL, ATCO 10-Jul-24 11:00 10-Jul-24 13:00 2 Hours
Continuous		 859s 52G (859s Primrose), 859s 501TD (859s Primrose) Transfer all load from 25kV Bus B to 25kV Bus A. Note 501TD is a 25kV switch not 144kV.  
EPCOR 15-Jul-24 07:00 19-Jul-24 17:00 4.42 Days
Continuous		 805s T1 (805s Jasper), EP 805s J2401 (EP 805s Jasper) Jasper: JDS2 LCR  
ALTALINK 15-Jul-24 08:00 19-Jul-24 15:00 4.29 Days
Continuous		 102s SVC (102s Langdon) Maintenance/ Inspection of SVC Components.  
ENMAXEC 15-Jul-24 08:00 19-Jul-24 18:00 4.42 Days
Continuous		 383s T1 (383s Kettles Hill Windfarm), 383s T2 (383s Kettles Hill Windfarm) substation maintenance  
ATCO 15-Jul-24 08:30 19-Jul-24 16:00 4.31 Days
Continuous		 2029s ACF11 (2029s Heathfield), 2029s ACF12 (2029s Heathfield), 2029s ACF13 (2029s Heathfield), 2029s ACF14 (2029s Heathfield) FILTER BANK AC MAINTENANCE  
ATCO 15-Jul-24 09:00 16-Jul-24 17:00 1.33 Days
Continuous		 849s 906 (849s Joslyn Creek) breaker maintenance  
ATCO 15-Jul-24 10:00 15-Jul-24 15:00 5 Hours
Continuous		 741s 701T (741s Fox Creek), 741s 701 (741s ATC Fox Creek), 741s 702 (741s ATC Fox Creek), 741s 702T (741s Fox Creek), 741s 703 (741s ATC Fox Creek), 741s 704 (741s ATC Fox Creek), 741s 705C (741s Fox Creek), 741s 705 (741s ATC Fox Creek) Relocate 700PT1 connections to the east side of the PT structure & create a J1 on the west side of the PT structure.  
ATCO 15-Jul-24 10:00 19-Jul-24 15:00 4.21 Days
Continuous		 774s 701 (774s Monitor) Modifications to panel 1G including relocation of breaker 701 control switches and 7L224 ION meter in preparation for addition of RAS enable / disable control.  
ALTALINK 15-Jul-24 10:00 22-Jul-24 14:00 7.17 Days
Continuous		 138s T1 (138s Windy Flats) Transformer internal inspection and repair from Siemens  
ATCO 15-Jul-24 11:00 18-Jul-24 15:00 3.17 Days
Continuous		 7L85 (801s Anderson - ATC 803s Bullpound) Cross arm and insulator replacement on 7L85  
ALTALINK 16-Jul-24 07:00 18-Jul-24 19:30 2.52 Days
Continuous		 1148L (251s Whitla - 1018s Shamrock) Annual Substation Maintenance Outage  
ALTALINK 16-Jul-24 08:00 25-Jul-24 17:00 9.38 Days
Continuous		 463L (15s Fort Macleod - 463AL tap) Crossarm & Insulator replacement 79-127 as well as minor conductor/downlead repairs 123 - 224  
ATCO 17-Jul-24 09:00 18-Jul-24 17:00 1.33 Days
Continuous		 849s 907 (849s Joslyn Creek) breaker maintenance  
ALTALINK 17-Jul-24 10:00 17-Jul-24 14:00 4 Hours
Daily		 250p 11 (250p Bighorn Plant) maintenance  
ALTALINK 18-Jul-24 10:00 18-Jul-24 14:00 4 Hours
Daily		 250p 22 (250p Bighorn Plant) maintenance  
SUNCOR 19-Jul-24 08:00 30-Jul-24 18:00 11.42 Days
Continuous		 29EDD-65 260kV Bus 29PP-0048 (29EDD-65), 29EDD-65 29-952-4811 (29EDD-65), 29EDD-65 29-952-4821 (29EDD-65) FB-29-952-4812, 4822 5y PM 29PP-48 SYSTEM;PM 5y (46555392, 46555395, 450237141)  
ATCO 22-Jul-24 08:00 25-Jul-24 16:00 3.33 Days
Continuous		 7L228 (845s Big Mountain - 7L20 tap) Changing rotten cross arm and poles  
ATCO 22-Jul-24 08:00 03-Aug-24 17:00 12.38 Days
Continuous		 788s 703 (788s Hotchkiss), 7L63 (788s Hotchkiss - 7LA63 tap) 703 breaker replacement  
ATCO 22-Jul-24 09:00 26-Jul-24 17:00 4.33 Days
Continuous		 849s 901T (849s Joslyn Creek) transformer maintenance, will require load transfer of 5L593 feeder to adjacent sub  
ATCO 22-Jul-24 11:00 25-Jul-24 15:00 3.17 Days
Continuous		 7L85 (801s Anderson - ATC 803s Bullpound) Cross arm and insulator replacement on 7L85  
EPCOR 29-Jul-24 07:00 02-Aug-24 17:00 4.42 Days
Continuous		 330p 1201 (330p Genesee), 330p 1204 (330p Genesee), 330p 1207 (330p Genesee), 330P 12TC1 (330p Genesee), 330p 805 (330p Genesee) Genesee: BUS 1 CVT Doble and 1201A, 1204A, 1207A Disconnect Maintenance  
EPCOR 29-Jul-24 07:00 30-Aug-24 17:00 32.42 Days
Continuous		 816s P2404 (816s Petrolia) Petrolia: P2404 Breaker LCR  
ATCO 29-Jul-24 08:00 01-Aug-24 16:00 3.33 Days
Continuous		 7L228 (845s Big Mountain - 7L20 tap) Changing rotten cross arm and poles  
ALTALINK 29-Jul-24 08:00 01-Aug-24 17:00 3.38 Days
Continuous		 463L (15s Fort Macleod - 463AL tap) Crossarm & Insulator replacement 79-127 as well as minor conductor/downlead repairs 123 - 224  
ATCO 29-Jul-24 08:30 02-Aug-24 16:00 4.31 Days
Continuous		 2029s ACF21 (2029s Heathfield), 2029s ACF22 (2029s Heathfield), 2029s ACF23 (2029s Heathfield) FILTER BANK AC MAINTENANCE @ HEATHFIELD 2029S ACF21, ACF22, ACF23  
ATCO 29-Jul-24 09:00 02-Aug-24 17:00 4.33 Days
Continuous		 2015s 901T (2015s Yeo) transformer maintenance,  
ALTALINK, EPCOR 29-Jul-24 09:30 02-Aug-24 17:00 4.31 Days
Continuous		 947L (89s Ellerslie - 987s Clover Bar), 987s C2402 (987s Clover Bar), 987s C2404 (987s Clover Bar) 947L: Arrestor, CT, CVT Doble and CDS27, CDS28, CDS29 Disconnect Maintenance  
ALTALINK, EPCOR 29-Jul-24 09:30 02-Aug-24 17:00 4.31 Days
Continuous		 947L (89s Ellerslie - 987s Clover Bar) 947L: Arrestor, CT, CVT Doble and CDS27, CDS28, CDS29 Disconnect Maintenance  
ATCO 29-Jul-24 12:30 29-Jul-24 16:30 4 Hours
Continuous		 7L85 (804s Wintering Hills - 7LA85 tap) insulator replacement on 7L85  
ATCO 30-Jul-24 08:00 01-Aug-24 15:00 2.29 Days
Continuous		 7L85 (801s Anderson - ATC 803s Bullpound) Cross arm and insulator replacement on 7L85  
ALTALINK 31-Jul-24 23:00 01-Aug-24 03:00 4 Hours
Daily		 62s 11 (62s Brazeau Plant) maintenance  
ALTALINK 01-Aug-24 03:00 01-Aug-24 07:00 4 Hours
Daily		 62s 12 (62s Brazeau Plant) maintenance  
SUNCOR 01-Aug-24 08:00 06-Aug-24 18:00 5.42 Days
Continuous		 29EDD-65 29-952-4812 (29EDD-65) FB-29EDD65;29-952-4812 MAIN & TEST;PM 5y (46555391)  
ATCO 04-Aug-24 10:00 04-Aug-24 17:00 7 Hours
Continuous		 801S 902, 801s 902 (801s Anderson) Final connection of Bkr 902/52a single pole status inputs to DFR, Commission  
ALTALINK 06-Aug-24 07:30 06-Aug-24 17:30 10 Hours
Daily		 180L (928s East Stavely - 180AL tap) Test LTO  
ATCO 06-Aug-24 09:00 09-Aug-24 17:00 3.33 Days
Continuous		 2015s 902T (2015s Yeo) transformer maintenance,  
ALTALINK, EPCOR 06-Aug-24 09:30 29-Aug-24 17:00 23.31 Days
Continuous		 1059L (EP 803s Lambton - 1059AL tap), 1059AL (52s East Industrial - 1059L tap), 1059L (38s East Edmonton - 1059AL tap), EP 803s L2401 (EP 803s Lambton), EP 803s L2404 (EP 803s Lambton), 52s E2401 (52s East Industrial), 52s T1 (52s East Industrial) Lambton: LDS8,1059L CVT LCR, and Steel Structure Refurbishment  
ALTALINK, EPCOR 06-Aug-24 09:30 29-Aug-24 17:00 23.31 Days
Continuous		 1059L (38s East Edmonton - 1059AL tap), 1059L (EP 803s Lambton - 1059AL tap) Lambton: LDS8,1059L CVT LCR, and Steel Structure Refurbishment  
ALTALINK 06-Aug-24 10:00 01-Sep-24 15:00 26.21 Days
Continuous		 199L (347s AML Fox Creek - 741s ATC Fox Creek) A741s work by ATCO  
SUNCOR 07-Aug-24 08:00 12-Aug-24 18:00 5.42 Days
Continuous		 29EDD-65 29-952-4822 (29EDD-65) FB-29EDD65;29-952-4822 MAIN & TEST;PM 5y (46555394)  
EPCOR 12-Aug-24 07:00 06-Mar-25 17:00 206.46 Days
Continuous		 987s T1 (987s Clover Bar) LCR: Cloverbar TX1  
ATCO 12-Aug-24 08:00 15-Aug-24 16:00 3.33 Days
Continuous		 7L228 (845s Big Mountain - 7L20 tap) Changing rotten cross arm and poles  
BCH 12-Aug-24 09:00 16-Aug-24 17:00 4.33 Days
Continuous		 2L294 (BCH A. A. Lambert - BCH Nelway) 2L294 (AAL-NLY) replace structure BC maintenance does not affect the Alberta ATC AB-BC
ATCO 13-Aug-24 10:00 13-Aug-24 17:00 7 Hours
Continuous		 801S 903, 801s 903 (801s Anderson) Final connection of Bkr 903 52a single pole status inputs to DFR, Commission  
ATCO 14-Aug-24 10:00 14-Aug-24 17:00 7 Hours
Continuous		 801S 904, 801s 904 (801s Anderson) Final connection of Bkr 904 52a single pole status inputs to DFR, Commission  
ATCO 15-Aug-24 10:00 15-Aug-24 17:00 7 Hours
Continuous		 801s 905 (801s Anderson) Final connection of Bkr 905 52a single pole status inputs to DFR, Commission  
ATCO 16-Aug-24 10:00 16-Aug-24 17:00 7 Hours
Continuous		 801s 906 (801s Anderson) Final connection of Bkr 906 52a single pole status inputs to DFR, Commission  
ATCO 17-Aug-24 10:00 17-Aug-24 17:00 7 Hours
Continuous		 801s 907 (801s Anderson) Final connection of Bkr 907 52a single pole status inputs to DFR, Commission  
ATCO 18-Aug-24 10:00 18-Aug-24 17:00 7 Hours
Continuous		 801s 908 (801s Anderson) Final connection of Bkr 908 52a single pole status inputs to DFR, Commission  
EPCOR 19-Aug-24 07:00 22-Aug-24 17:00 3.42 Days
Continuous		 EP 803s T1 (EP 803s Lambton) Lambton: TX1 PDR and Conservator Leak Repair  
ALTALINK, EPCOR 19-Aug-24 07:00 25-Aug-24 17:00 6.42 Days
Continuous		 1239L (330p Genesee - 510s Sunnybrook), 330p 1205 (330p Genesee), 330p 1206 (330p Genesee) Genesee: 1239L CVT, Arrestor Doble and 1239LD, 1205b, 1206B Disconnect Maintenance and 1239L, 1205, 1206 P&C Maintenance  
ATCO 19-Aug-24 08:00 22-Aug-24 16:00 3.33 Days
Continuous		 7L228 (845s Big Mountain - 7L20 tap) Changing rotten cross arm and poles  
ALTALINK 19-Aug-24 09:00 19-Aug-24 18:00 9 Hours
Daily		 908L (38s East Edmonton - 908AL tap), 908L (89s Ellerslie - 908AL tap) Cutover new alarms, controls, and statuses to new SCADA system.  
BCH 19-Aug-24 09:00 30-Aug-24 17:00 11.33 Days
Continuous		 5L92 (BCH Cranbrook - BCH Selkirk) 5L92 replace insulators & spacers BC maintenance does not affect the Alberta ATC AB-BC
ALTALINK, EPCOR 19-Aug-24 09:30 25-Aug-24 17:00 6.31 Days
Continuous		 1239L (330p Genesee - 510s Sunnybrook) Genesee: 1239L CVT, Arrestor Doble and 1239LD, 1205b, 1206B Disconnect Maintenance and 1239L, 1205, 1206 P&C Maintenance  
ALTALINK 20-Aug-24 07:00 20-Aug-24 18:00 11 Hours
Daily		 946L (38s East Edmonton - 89s Ellerslie) Cutover new alarms, controls, and statuses to new SCADA system.  
ALTALINK, EPCOR 21-Aug-24 07:00 21-Aug-24 18:00 11 Hours
Daily		 1059L (38s East Edmonton - 1059AL tap), 1059L (EP 803s Lambton - 1059AL tap) Cutover new alarms, controls, and statuses to new SCADA system.  
ALTALINK, EPCOR 22-Aug-24 07:00 22-Aug-24 18:00 11 Hours
Daily		 915L (38s East Edmonton - 987s Clover Bar) Cutover new alarms, controls, and statuses to new SCADA system.  
EPCOR 26-Aug-24 07:00 30-Aug-24 17:00 4.42 Days
Continuous		 987s T1 (987s Clover Bar), 987s CCP7213 (987s Clover Bar), 987s CCP7214 (987s Clover Bar), 987s C2401 (987s Clover Bar), 987s C2403 (987s Clover Bar), 987s CDS18 (987s Cloverbar) PT retest and C2401 dashpot repair  
EPCOR 26-Aug-24 07:00 31-Aug-24 17:00 5.42 Days
Continuous		 EP 803s T2 (EP 803s Lambton), EP 803s L2402 (EP 803s Lambton), EP 803s L2405 (EP 803s Lambton) Lambton: LDS9 LCR and TX2 Leak Repair and L2402 P&C Maintenance  
EPCOR 26-Aug-24 07:00 31-Aug-24 17:00 5.42 Days
Continuous		 T4 (Poundmaker), PM2403 (Poundmaker), PM2402 (Poundmaker), PM721 (Poundmaker) Poundmaker: (TX4 Zone) PM2402, PM2403 Breaker Maintenance and BUS 3 CVT Doble and PMAB4, PMDS4, PMDS5 Disconnect Maintenance  
ATCO 26-Aug-24 08:00 29-Aug-24 16:00 3.33 Days
Continuous		 7L228 (845s Big Mountain - 7L20 tap) Changing rotten cross arm and poles  
ATCO 26-Aug-24 08:00 30-Aug-24 16:00 4.33 Days
Continuous		 7L69 (731s Elmworth - 815s Goodfare) Changing rotten poles  
ATCO 26-Aug-24 08:00 20-Sep-24 17:30 25.4 Days
Continuous		 840s McNeill Station, 840s 701T (840s McNeill Station), 840s 901T (840s McNeill Station), 840s 901 (840s McNeill Station), 840s 701 (840s McNeill Station), 840s 702C (840s McNeill Station), 840s 703C (840s McNeill Station) Transformer 701T and 901T Bushing replacements and post replacement testing HMI Server 1 replacement and commissioning. Annual maintenance AB-SK
ALTALINK 26-Aug-24 12:00 26-Aug-24 17:30 5.5 Hours
Daily		 180L (15s Fort Macleod - 180AL tap) Cutover LTO to AIS relay  
ALTALINK 27-Aug-24 07:30 28-Aug-24 17:30 1.42 Days
Continuous		 349s T1 (349s Stavely) Test AIS from 15s to 349s  
ATCO 27-Aug-24 10:00 27-Aug-24 17:00 7 Hours
Continuous		 801s 909 (801s Anderson) Final connection of Bkr 909 52a single pole status inputs to DFR, Commission  
ALTALINK 27-Aug-24 12:30 27-Aug-24 17:00 4.5 Hours
Daily		 463L (15s Fort Macleod - 463AL tap) Cutover LTO to AIS relay  
ALTALINK 27-Aug-24 23:00 29-Aug-24 07:00 1.33 Days
Continuous		 250p 22 (250p Bighorn Plant) maintenance  
ALTALINK 28-Aug-24 07:00 29-Aug-24 07:00 24 Hours
Continuous		 250p 11 (250p Bighorn Plant) maintenance  
ATCO 28-Aug-24 10:00 28-Aug-24 17:00 7 Hours
Continuous		 801s 910 (801s Anderson) Final connection of Bkr 910 52a single pole status inputs to DFR, Commission  
ATCO 29-Aug-24 10:00 29-Aug-24 17:00 7 Hours
Continuous		 801s 911 (801s Anderson) Final connection of Bkr 911 52a single pole status inputs to DFR, Commission  
ATCO 30-Aug-24 10:00 30-Aug-24 17:00 7 Hours
Continuous		 801s 912 (801s Anderson) Final connection of Bkr 912 52a single pole status inputs to DFR, Commission  
BCH 01-Sep-24 08:00 04-Oct-24 16:00 33.33 Days
Continuous		 1L274 (48s Pocaterra - 978s BCH Britt Creek) 5L94 replace insulators & spacers AB-BC
ALTALINK 02-Sep-24 07:30 02-Sep-24 12:00 4.5 Hours
Daily		 1202L (89s Ellerslie - 320p Keephills), 320p 3152 (320p Keephills), 320p 3052 (320p Keephills) connect Summated 1202L CT from 320p3152 & 320p3052 to new PMU  
ALTALINK, EPCOR 02-Sep-24 12:00 02-Sep-24 16:30 4.5 Hours
Daily		 1203L (320p Keephills - 510s Sunnybrook), 320p 3452 (320p Keephills), 320p 2952 (320p Keephills) connect Summated 1203L CT from 320p3452 & 320p2952 to new PMU  
EPCOR 03-Sep-24 07:00 06-Sep-24 17:00 3.42 Days
Continuous		 EP 805s J2405 (EP 805s Jasper) Jasper: J2405 CT Doble  
ALTALINK, EPCOR 03-Sep-24 07:00 07-Sep-24 17:00 4.42 Days
Continuous		 915L (38s East Edmonton - 987s Clover Bar), 987s C2403 (987s Clover Bar), 987s C2405 (987s Clover Bar) Cloverbar: 915L Arrestor, CVT, CT Doble and CDS37, CDS35, CDS36 Disconnect Maintenance  
EPCOR, ALTALINK 03-Sep-24 07:00 07-Sep-24 17:00 4.42 Days
Continuous		 EP 803s T3 (EP 803s Lambton), EP 803s L2403 (EP 803s Lambton), EP 803s L2405 (EP 803s Lambton), EP 803s L721 (EP 803s Lambton) Lambton: LDS10 LCR and L2405 P&C Maintenance  
EPCOR 03-Sep-24 07:00 13-Sep-24 17:00 10.42 Days
Continuous		 816s P2404 (816s Petrolia), 816s P2405 (816s Petrolia), 816s T2 (816s Petrolia) Petrolia: P2405 Breaker LCR and TX2 Zone Doble and Disconnect Maintenance (042066)  
ALTALINK 03-Sep-24 07:30 03-Sep-24 12:00 4.5 Hours
Daily		 1045AL (320p Keephills - 1045L tap), 320p 1352 (320p Keephills) Connect 1045AL CT from 320p1352 to new PMU  
ATCO 03-Sep-24 08:00 09-Sep-24 16:00 6.33 Days
Continuous		 7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
BCH 03-Sep-24 09:00 13-Sep-24 17:00 10.33 Days
Continuous		 5L91 (BCH Ashton Creek - BCH Selkirk) replace insulators & marker balls BC maintenance does not affect the Alberta ATC AB-BC
ALTALINK, EPCOR 03-Sep-24 09:30 07-Sep-24 17:00 4.31 Days
Continuous		 915L (38s East Edmonton - 987s Clover Bar) Cloverbar: 915L, P&C- 240kV Mimic Panel Decomm  
ALTALINK, EPCOR 03-Sep-24 12:00 03-Sep-24 16:30 4.5 Hours
Daily		 1043L (320p Keephills - 367s Harry Smith), 320p 252 (320p Keephills), 320p 352 (320p Keephills) Connect Summated 1043L CT from 320p252 & 320p352 to new PMU  
ALTALINK 04-Sep-24 07:30 04-Sep-24 12:00 4.5 Hours
Daily		 190L (17s Benalto - 320p Keephills), 320p 652 (320p Keephills), 320p 552 (320p Keephills) Connect Summated 190L CT from 320p552 & 320p652 to new PMU  
ATCO 04-Sep-24 08:30 05-Sep-24 17:30 1.38 Days
Continuous		 825s 901 (825s Whitefish Lake) 901 PRC Trip Coil Testing
901 NISSIN CT Testing/Inspection		  
BCH 04-Sep-24 09:00 06-Sep-24 17:00 2.33 Days
Continuous		 5L91 (BCH Ashton Creek - BCH Selkirk), 5D44 (BCH Ashton Creek) 5D44, 5D1CB4, 5D2CB3 disconnects inspection BC maintenance does not affect the Alberta ATC AB-BC
ALTALINK, EPCOR 04-Sep-24 12:00 04-Sep-24 16:30 4.5 Hours
Daily		 930L (37s North Calder - Poundmaker), 320p 2052 (320p Keephills), 320p 2152 (320p Keephills) Connect Summated 903L CT from 320p2052 & 320p2152 to new PMU  
ATCO 09-Sep-24 08:30 10-Sep-24 17:30 1.38 Days
Continuous		 825s 902 (825s Whitefish Lake) 902 PRC Trip Coil Testing
902 NISSIN CT Testing/Inspection		  
ATCO 09-Sep-24 10:00 16-Sep-24 17:00 7.29 Days
Continuous		 7L62 (797s Kemp River - 905s Meikle) Connect new DFR to 7L62PTY1, 7L62/21A, 21B and commission
Migrate SCADA alarms, control, analogs from the existing RTU to the new Station Controller, end-to-end commissioning		  
ALTALINK 09-Sep-24 11:30 13-Sep-24 17:30 4.25 Days
Continuous		 254s T1 (254s Coaldale) Maint. and bushing replacement  
ALTALINK 10-Sep-24 08:00 11-Sep-24 17:30 1.4 Days
Continuous		 899s 749N (899s Edgerton), 749L (899s Edgerton - 7LB749 tap) Replace 749LN A21/L8 line protection.  
ATCO 10-Sep-24 09:00 02-Dec-24 11:00 83.13 Days
Continuous		 848S 603, 848S 604, 848S 605T, 848S 606, 848S 848-501, 848S 848-504, 848S 848S 500BS2 25kv Protection System, 848S 900BS2, 848S 902T, 848s 240kV Bus 900BS2 (848s Ruth Lake), 848s 902T (848s Ruth Lake) 848S Ruth Lake Substation Rebuild: upgrading protection to IEC 61850, Replace breakers 603 & 604. Cut over to new protection: Install oil containment for 902T. Pull all new outdoor cable, modify cable tray, install new cable tray.  
ATCO 11-Sep-24 08:30 12-Sep-24 17:30 1.38 Days
Continuous		 825s 903 (825s Whitefish Lake) 903 PRC Trip Coil Testing
903 NISSIN CT Testing/Inspection		  
ALTALINK 11-Sep-24 23:00 12-Sep-24 03:00 4 Hours
Daily		 62s 12 (62s Brazeau Plant) maintenance  
EPCOR 13-Sep-24 07:00 04-Oct-24 17:00 21.42 Days
Continuous		 816s P2405 (816s Petrolia) Petrolia: P2405 Breaker LCR  
ATCO 13-Sep-24 10:00 13-Sep-24 16:00 6 Hours
Continuous		 951s 920C (951s Thickwood), 951s 920 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
ATCO 16-Sep-24 08:00 23-Sep-24 16:00 7.33 Days
Continuous		 7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
ENMAX 16-Sep-24 08:00 04-Oct-24 16:00 18.33 Days
Continuous		 65.1TR (SS-65) Transformer Power Factor Test - 65.1TR. Tap Changer Inspection - 65.1-TC  
ATCO 16-Sep-24 09:00 17-Sep-24 17:30 1.35 Days
Continuous		 826s 908 (826s Marguerite Lake) Nissin CT inspection and Testing.  
BCH 16-Sep-24 09:00 20-Sep-24 17:00 4.33 Days
Continuous		 5L98 (BCH Nicola - BCH Vaseux Lake) replace insulators & marker balls BC maintenance does not affect the Alberta ATC AB-BC
ATCO 16-Sep-24 10:00 07-Oct-24 17:00 21.29 Days
Continuous		 9L100 (801s Anderson - 807s Sheerness) Replace Breaker 902 @ 807S Sheerness, complete line 21A, 21B/9L100 protection upgrade and Commissioning  
ALTALINK 16-Sep-24 12:30 21-Sep-24 17:30 5.21 Days
Continuous		 368s T2 (368s Burdett) Maint. and bushing replacement  
ATCO 16-Sep-24 13:00 19-Sep-24 15:00 3.08 Days
Continuous		 7L171 (802s Michichi Creek - 804s Wintering Hills) Cross arm and insulator replacement on 7L171, 30 Structures  
ALTALINK 17-Sep-24 08:00 17-Sep-24 17:00 9 Hours
Daily		 100L (498s Tilley - 895s Suffield) Repair OHSW bond at structure 180.  
ALTALINK 18-Sep-24 08:00 18-Sep-24 17:00 9 Hours
Daily		 763L (158s Vauxhall - 257s Hull) Repair conductor damage at structure 491.  
ALTALINK 19-Sep-24 08:00 19-Sep-24 17:00 9 Hours
Daily		 880L (321s Al Rothbauer - 523s Bullshead) Re-tie OHSW at structure 8.  
ATCO 19-Sep-24 10:00 19-Sep-24 16:00 6 Hours
Continuous		 951s 908 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
EPCOR 23-Sep-24 07:00 23-Sep-24 17:00 10 Hours
Continuous		 PM2401 (Poundmaker) Poundmaker: PM2401 Breaker Maintenance  
EPCOR 23-Sep-24 07:00 11-Oct-24 17:00 18.42 Days
Continuous		 240BA3 (629s Argyll Transfer Station - 814s Bellamy) 240BA3: Oil Degassing UGT  
ALTALINK 23-Sep-24 08:00 04-Oct-24 18:00 11.42 Days
Continuous		 1201L (520s Bennett - BCH Cranbrook) Maintenance tasks str range 18-513.  
ALTALINK 23-Sep-24 08:00 04-Oct-24 18:00 11.42 Days
Continuous		 48s 887X (48s Pocaterra), 887L (48s Pocaterra - 978s BCH Britt Creek) 887L required to be open due to 1201L as per AESO Rule AB-BC
ALTALINK 23-Sep-24 08:00 04-Oct-24 18:00 11.42 Days
Daily		 799s 786W (799s Coleman), 786L (799s Coleman - BCH Natal) 887L required to be open due to 1201L as per AESO Rule  
BHE Canada 23-Sep-24 09:00 04-Oct-24 17:00 11.33 Days
Continuous		 MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
AESO 23-Sep-24 09:00 04-Oct-24 17:00 11.33 Days
Continuous		 Path 1 (AIES Islanding) 5L94 replace insulators & spacers AB-BC
ATCO 23-Sep-24 11:00 26-Sep-24 15:00 3.17 Days
Continuous		 7L171 (802s Michichi Creek - 804s Wintering Hills) Cross arm and insulator replacement on 7L171, 30 Structures  
ATCO 23-Sep-24 15:30 04-Nov-24 15:00 42.02 Days
Continuous		 741s 702T (741s Fox Creek), 7L199 (347s AML Fox Creek - 741s ATC Fox Creek), 741s 702 (741s ATC Fox Creek), 741s 705C (741s Fox Creek) Demo 144kV bus and structures up to J1, install new foundations, steel structures up to J1, Demo old PT, Replace gang switches 7L199D1 & 702A, string new overhead bus and connect equipment.
Complete protection upgrade & Commissioning activities to accommodate 7L199 upgrade and 7LA199 T-Tap.
  
ALTALINK 23-Sep-24 23:00 06-Nov-24 16:00 43.75 Days
Continuous		 62s 11 (62s Brazeau Plant) Major maintenance  
EPCOR 24-Sep-24 07:00 24-Sep-24 17:00 10 Hours
Continuous		 PM2404 (Poundmaker) Poundmaker: PM2404 Breaker Maintenance  
ALTALINK 24-Sep-24 08:30 25-Sep-24 17:30 1.38 Days
Daily		 520s T1 (520s Bennett), 520s 552 (520s Bennett) 520sT1, 552 Maintenance..  
ATCO 26-Sep-24 10:00 26-Sep-24 16:00 6 Hours
Continuous		 951S 902 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
BCH 30-Sep-24 08:00 04-Oct-24 16:00 4.33 Days
Continuous		 5L94 (BCH Cranbrook - 102s Langdon) 5L94 replace insulators & spacers AB-BC
BCH 30-Sep-24 08:00 04-Oct-24 16:00 4.33 Days
Continuous		 1L275 (799s Coleman - BCH Natal) 5L94 replace insulators & spacers AB-BC
ATCO 30-Sep-24 08:00 07-Oct-24 16:00 7.33 Days
Continuous		 7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
EPCOR 01-Oct-24 07:00 11-Oct-24 17:00 10.42 Days
Continuous		 987s T3 (987s Clover Bar), 987s C2407 (987s Clover Bar) Cloverbar TX3 DGA Install  
BCH 01-Oct-24 08:00 01-Oct-24 16:00 8 Hours
Continuous		 1L274 (48s Pocaterra - 978s BCH Britt Creek) CBK 5RX5 / CBK 5B5 / 5L94 - 5CVT5 Inspection AB-BC
BCH 01-Oct-24 08:00 01-Oct-24 16:00 8 Hours
Continuous		 1L275 (799s Coleman - BCH Natal) CBK 5RX5 / CBK 5B5 / 5L94 - 5CVT5 Inspection AB-BC
ALTALINK 01-Oct-24 08:00 03-Oct-24 17:00 2.38 Days
Continuous		 607L (135s Conrad - 607AL tap) Replace x-brace at structure 213. Install Post insulators on structure 222. Replace structure 242.  
ATCO 02-Oct-24 10:00 02-Oct-24 16:00 6 Hours
Continuous		 951s 906 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
ALTALINK 05-Oct-24 08:00 05-Oct-24 17:00 9 Hours
Daily		 180L (15s Fort Macleod - 180AL tap) Re-tie OHSW at structure 538 & 539.  
EPCOR 07-Oct-24 07:00 11-Oct-24 17:00 4.42 Days
Continuous		 EP 803s T3 (EP 803s Lambton), EP 803s L721 (EP 803s Lambton) Lambton: L721 Bay PT LCR  
ALTALINK 07-Oct-24 07:00 16-Oct-24 17:00 9.42 Days
Continuous		 1325L (510s Sunnybrook - AML 511s Crossings) WATL Annual Link Outage, DC Yard maintenance, Valve Hall Grading Electrode Inspections, VCS work, 511s5957 Ground Switch Repairs  
EPCOR 07-Oct-24 07:00 08-Nov-24 17:00 32.46 Days
Continuous		 816s P2402 (816s Petrolia) Petrolia: P2402 Breaker LCR  
ALTALINK, Lethbridge 07-Oct-24 08:00 09-Oct-24 17:00 2.38 Days
Continuous		 207L (111s Coalbanks - 370s North Lethbridge) Install post insulators on structure 6. Hardware tighten structure 8. Replace structure at structure 11.  
ENMAX 07-Oct-24 08:00 25-Oct-24 16:00 18.33 Days
Continuous		 65.2TR (SS-65) Transformer Power Factor Test - 65.2TR. Tap Changer Inspection - 65.2-TC  
BCH 07-Oct-24 09:00 07-Oct-24 17:00 8 Hours
Continuous		 2L293 (BCH Nelway - BCH Selkirk) NLY 2D22 disconnect maintenance BC maintenance does not affect the Alberta ATC

AB-BC
BCH 07-Oct-24 09:00 18-Oct-24 17:00 11.33 Days
Continuous		 5L52 (BPA Custer - BCH Ingledow) 5L52 tower replacements BC maintenance does not affect the Alberta ATC AB-BC
BCH 07-Oct-24 09:00 01-Nov-24 17:00 25.33 Days
Continuous		 2L293 (BCH Nelway - BCH Selkirk) 2L293 replace structure & crossarms BC maintenance does not affect the Alberta ATC AB-BC
ATCO 07-Oct-24 10:00 10-Oct-24 16:30 3.27 Days
Continuous		 7L50 (757s Battle River - 491L tap) Structure, cross arm and insulator replacement on 7L50 between battle river and Jarrow.  
ALTALINK 10-Oct-24 07:30 11-Oct-24 16:30 1.38 Days
Continuous		 AML 511s T30 (AML 511s Crossings), AML 511s SVC Plus (AML 511s Crossings) ACF14 and SVC+ Inspection & Maintenance.  
ATCO 10-Oct-24 10:00 10-Oct-24 16:00 6 Hours
Continuous		 951s 905 (951s Thickwood Hills) PRC-005 Trip Coil Testing  
BCH 14-Oct-24 09:00 25-Oct-24 17:00 11.33 Days
Continuous		 T2 (BCH Natal) NTL T2 PCB bushing replacement BC maintenance does not affect the Alberta ATC AB-BC
ATCO 14-Oct-24 10:00 17-Oct-24 16:30 3.27 Days
Continuous		 7L50 (757s Battle River - 491L tap) Structure, cross arm and insulator replacement on 7L50 between battle river and Jarrow.  
ATCO 15-Oct-24 08:00 21-Oct-24 16:00 6.33 Days
Continuous		 7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
ALTALINK 16-Oct-24 07:00 16-Oct-24 18:00 11 Hours
Daily		 913L (69s North Barrhead - 732s Mitsue) Replace Insulators at structure 150.  
ALTALINK 16-Oct-24 10:00 16-Oct-24 14:00 4 Hours
Daily		 250p 11 (250p Bighorn Plant) maintenance  
ALTALINK 17-Oct-24 07:00 17-Oct-24 18:00 11 Hours
Daily		 199L (268s Whitecourt - 199AL tap) Replace keeper keys at structure 375  
ALTALINK 17-Oct-24 10:00 17-Oct-24 14:00 4 Hours
Daily		 250p 22 (250p Bighorn Plant) maintenance  
BCH 21-Oct-24 09:00 01-Nov-24 17:00 11.33 Days
Continuous		 5L51 (BPA Custer - BCH Ingledow) 5L51 tower replacements BC maintenance does not affect the Alberta ATC AB-BC
ATCO 21-Oct-24 10:00 24-Oct-24 16:30 3.27 Days
Continuous		 7L50 (757s Battle River - 491L tap) Structure, cross arm and insulator replacement on 7L50 between battle river and Jarrow.  
ATCO 28-Oct-24 08:00 04-Nov-24 16:00 7.38 Days
Continuous		 7L32 (813s Little Smoky - 862s South Bezanson) Changing rotten poles and red tag poles  
ALTALINK 30-Oct-24 23:00 31-Oct-24 03:00 4 Hours
Daily		 62s 11 (62s Brazeau Plant) maintenance  
ALTALINK 31-Oct-24 03:00 31-Oct-24 07:00 4 Hours
Daily		 62s 12 (62s Brazeau Plant) maintenance  
ALTALINK 11-Nov-24 07:00 11-Nov-24 11:00 4 Hours
Daily		 879L (244s Bowmanton - 879AL tap), 879L (368s Burdett - 879L tap) Open East side jumpers at 457A.  
ALTALINK 11-Nov-24 11:00 21-Nov-24 14:00 10.13 Days
Continuous		 879L (244s Bowmanton - 879AL tap) Replace cross-arms, pole replacement and bird diverter installation between str 303-450 - VATD.  
ALTALINK 16-Nov-24 07:00 18-Nov-24 18:00 2.46 Days
Continuous		 676L (244s Bowmanton - 523s Bullshead) OPGW will be cut and spliced into to bring the fiber down for the new 1011s Dunmore Substation  
ALTALINK 16-Nov-24 08:00 20-Nov-24 17:00 4.38 Days
Continuous		 851L (253s Blackie - 525s Carseland) Replace dead-end insulators at structures 125, 132, 133 & 139. Replace arms and insulators at structures 130, 134, 150, 153 & 155. Replace arms and insulators with line post insulators at structure 131. Repair downlead at structures 139 & 150  
ALTALINK 21-Nov-24 14:00 21-Nov-24 18:00 4 Hours
Daily		 879L (244s Bowmanton - 879AL tap), 879L (368s Burdett - 879L tap) Close East side jumpers at 457A.  
ENMAX, ALTALINK 25-Nov-24 08:00 08-Dec-24 16:00 13.33 Days
Continuous		 20.82L (SS-20 - SS-21), 21.80L (42s Sarcee - SS-21), 21.1TR (SS-21) HV SW Replacement 21SW81, 21SW82, 21SW83, 21MD138-21.1TR, 21.4TR (SS-21)  
ALTALINK, ENMAX 25-Nov-24 08:00 08-Dec-24 16:00 13.33 Days
Continuous		 42s 22 (42s Sarcee), 21.80L (42s Sarcee - SS-21) HV SW Replacement 21SW81, 21SW82, 21SW83, 21MD138-21.1TR, 21.4TR (SS-21)  
ATCO 25-Nov-24 09:00 02-Dec-24 16:00 7.29 Days
Continuous		 7L40 (733s Simonette - 813s Little Smoky) 7l40 Line to ground mitigation  
ALTALINK 26-Nov-24 08:00 30-Nov-24 17:00 4.38 Days
Continuous		 850L (525s Carseland - 678s Okotoks) Replace aerial marker at structure 147. Replace insulators at structure 111, 128 & 129. Replace arms and insulators at structure 130 & 148. Repair downlead at structures 131, 133, 134, 135, 136, 138, 139 & 140.  
ALTALINK 04-Dec-24 10:00 04-Dec-24 14:00 4 Hours
Daily		 250p 11 (250p Bighorn Plant) maintenance  
ALTALINK 05-Dec-24 10:00 05-Dec-24 14:00 4 Hours
Daily		 250p 22 (250p Bighorn Plant) maintenance  
ENMAX, ALTALINK 09-Dec-24 08:00 18-Dec-24 16:00 9.33 Days
Continuous		 50L (44s Bearspaw Plant - SS-21), 21.1C (SS-21), 21.2TR (SS-21) HV SW Replacement 21SW87, 21SW88, 21SW89, 21MD138-21.2TR  
ENMAX, ALTALINK 09-Dec-24 08:00 18-Dec-24 16:00 9.33 Days
Continuous		 50L (44s Bearspaw Plant - SS-21) HV SW Replacement 21SW87, 21SW88, 21SW89, 21MD138-21.2TR  
ATCO 09-Dec-24 09:00 16-Dec-24 16:00 7.29 Days
Continuous		 7L40 (733s Simonette - 813s Little Smoky) 7l40 Line to ground mitigation  
ALTALINK 18-Dec-24 23:00 19-Dec-24 03:00 4 Hours
Daily		 62s 11 (62s Brazeau Plant) maintenance  
ALTALINK 19-Dec-24 03:00 19-Dec-24 07:00 4 Hours
Daily		 62s 12 (62s Brazeau Plant) maintenance  
ATCO 17-Feb-25 08:00 20-Feb-25 17:00 3.38 Days
Continuous		 7L128 (802s Michichi Creek - 7LA128 tap) Installation of dynamic line rating sensors.  
ALTALINK 18-Mar-25 07:00 31-Mar-25 18:00 13.46 Days
Continuous		 610L (83s Taber - 336s Fincastle) VATD - Rebuild 610L.  
ATCO 18-Mar-25 08:00 19-Mar-25 17:00 1.38 Days
Continuous		 7L53 (706s Irish Creek - 7LA53 tap), 7LA53 (969s Lindbergh - 7L53 tap), 7L53 (700s Bonnyville - 7LA53 tap) Cold Lake Area Project to connect 1064s  
ATCO 24-Mar-25 08:00 27-Mar-25 17:00 3.38 Days
Continuous		 7L91 (715s Leming Lake - 826s Marguerite Lake) Cold Lake Area Energy Centre Project
Cutover CT/PT/P&C ccts for new Thermal RAS relays
Complete commissioning 49A/49B/7L91 relays
End-to-end testing to 1064S		  
ENMAX, ALTALINK 25-Apr-25 08:00 28-Apr-25 16:00 3.33 Days
Continuous		 20.82L (SS-20 - SS-21), 21.80L (42s Sarcee - SS-21), 21.1TR (SS-21), 50L (44s Bearspaw Plant - SS-21), 21.1C (SS-21), 21.2TR (SS-21) HV SW Replacement 21SW86. Full substation outage  
ATCO 29-Apr-25 10:00 20-May-25 17:00 21.29 Days
Continuous		 9L99 (801s Anderson - 807s Sheerness) Replace Breaker 901 @ 807S Sheerness, complete line 21A, 21B/9L99 protection upgrade and Commissioning  
ATCO, Syncrude 20-May-25 09:00 12-Jun-25 10:00 23.04 Days
Continuous		 848S 910, 848S 911, 848S RL1 SYNCRUDE ISLANDING RAS (IRAS), RL1 (848s Ruth Lake - D05) 848S Ruth Lake Sub rebuild/upgrade protection to IEC 61850 - Cut over to new protection: 910CT,910,910B,910PT,RL-1D1,911B,911,911CT.  
SUNCOR 06-Jun-25 00:00 22-Jun-25 00:00 16 Days
Continuous		 29PL7-4 (29EDD-65 - 29EDD-71), 29EDD-65 29PS-0284 (29EDD-65 Edd65Sub), 29EDD-71 29PS-243 (29EDD-71 Edd71Sub), 29EDD-65 29PT-0257 (29EDD-65) FB-Maintenance and Testing - 29PT-260, 29PL7-4, 29PT-241, 29PT-257, 29PS-243 (450236799, 450233735, 31773784, 450237159)  
ATCO 09-Jun-25 09:00 23-Jun-25 17:30 14.35 Days
Continuous		 2029S BUILDING VALVE HALL, 2029s 1205 (2029s Heathfield), 2029s 1206 (2029s Heathfield) Annual EATL outage at 2075s & 2029s.

2029s & 2075s AC & DC O&M.

USE 2-70215 FOR 13L50 GOI
USE 2-70216 FOR 2029s GOI
USE 2-70217 FOR 2075s GOI		  
ATCO 09-Jun-25 09:00 23-Jun-25 17:30 14.35 Days
Continuous		 2075S BUILDING VALVE HALL, 2075s 916 (2075s Newell), 2075s 917 (2075s Newell) Annual EATL outage at 2075s & 2029s.

2029s & 2075s AC & DC O&M.

USE 2-70215 FOR 13L50 GOI
USE 2-70216 FOR 2029s GOI
USE 2-70217 FOR 2075s GOI		  
ATCO 09-Jun-25 09:00 23-Jun-25 17:30 14.35 Days
Continuous		 13L50 (DC LINK), 13L50 (2029s Heathfield - 2075s Newell) Annual EATL outage at 2075s & 2029s.

2029s & 2075s AC & DC O&M.

USE 2-70215 FOR 13L50 GOI
USE 2-70216 FOR 2029s GOI
USE 2-70217 FOR 2075s GOI		  
ATCO 12-Jun-25 11:00 04-Jul-25 09:00 21.92 Days
Continuous		 848S 911, 848S 913, 9L01 (848s Ruth Lake - 951s Thickwood Hills), 848s 911 (848s Ruth Lake), 848s 913 (848s Ruth Lake) 848S Ruth Lake Sub rebuild/upgrade protection to IEC 61850 - Cut over to new protection: 911,911CT,912B,9L01D1,913PT,913B,913,913CT  
SUNCOR 01-Jul-25 00:00 18-Jul-25 00:00 17 Days
Continuous		 29PL7-3 (29EDD-65 - 29EDD-71), 29EDD-65 29PT-0236 (29EDD-65) FB-Maintenance and Testing - 29PT-250, 29PL7-3, 29PT-246, 29PT-236 (450237140, 450237180, 450237158)  
ATCO 04-Jul-25 11:00 24-Jul-25 09:00 19.92 Days
Continuous		 848S 905, 848S 906, 9L23 (848s Ruth Lake - 977s Salt Creek), 848s 905 (848s Ruth Lake), 848s 906 (848s Ruth Lake) 848S Ruth Lake Sub rebuild/upgrade protection to IEC 61850 - Cut over to new protection: 905CT,905,905B,905PT,9L23D1,906B,906,906CT,906A.  
ATCO, SUNCOR 24-Jul-25 11:00 14-Aug-25 09:00 20.92 Days
Continuous		 848S 906, 848S 903, 848S 29PL9-1 SUNCOR ISLANDING RAS (IRAS), 29PL9-1 (29EDD-1 Millennium - 848s Ruth Lake), 848s 903 (848s Ruth Lake), 848s 906 (848s Ruth Lake) 848S Ruth Lake Sub rebuild/upgrade protection to IEC 61850 - Cut over to new protection: 906,906CT,904B,29PL9-1D1,903PT,903B,903,903CT.  
ATCO, SUNCOR 14-Aug-25 11:00 04-Sep-25 09:00 20.92 Days
Continuous		 848S 901, 848S 902, 848S 29PL9-2 SUNCOR ISLANDING RAS (IRAS), 29PL9-2 (29EDD-1 Millennium - 848s Ruth Lake), 848s 901 (848s Ruth Lake), 848s 902 (848s Ruth Lake) 848S Ruth Lake Sub rebuild/upgrade protection to IEC 61850 - Cut over to new protection: 901CT,901,901B,901PT,29PL9-2D1,902B,902,902CT.  
ATCO, Syncrude 04-Sep-25 11:00 25-Sep-25 09:00 20.92 Days
Continuous		 848S 902, 848S 907, 848s 902 (848s Ruth Lake), 848s 907 (848s Ruth Lake), RL2 (848s Ruth Lake - D05) 848S Ruth Lake Sub rebuild/upgrade protection to IEC 61850 - Cut over to new protection: 902,902CT,902A,902PT,RL-2D1,907A,907CT,907.  
ATCO 25-Sep-25 11:00 17-Oct-25 14:00 22.13 Days
Continuous		 848S 907, 848S 908, 9L58 (848s Ruth Lake - 888s Dover), 848s 907 (848s Ruth Lake), 848s 908 (848s Ruth Lake) 848S Ruth Lake Sub rebuild/upgrade protection to IEC 61850 - Cut over to new protection: 907CT,907,907B,9L58D2,908PT,908B,908,908CT.  
ALTALINK 01-Oct-25 08:00 05-Nov-25 17:00 35.42 Days
Continuous		 102s SVC (102s Langdon), 102s T4 (102s Langdon) the controls change  
ALTALINK 01-Oct-25 08:00 05-Nov-25 18:00 35.46 Days
Continuous		 1201L (520s Bennett - BCH Cranbrook) Replacing 102s SVC controls  
ALTALINK 01-Oct-25 08:00 05-Nov-25 18:00 35.46 Days
Continuous		 786L (799s Coleman - BCH Natal) 887L required to be open due to 1201L as per AESO Rule  
ALTALINK 01-Oct-25 08:00 05-Nov-25 18:00 35.46 Days
Continuous		 887L (48s Pocaterra - 978s BCH Britt Creek) 887L required to be open due to 1201L as per AESO Rule AB-BC

AB-BC, AB-SK & AB-MATL: refer to AESO web posting: http://itc.aeso.ca/itc/public/atc
Also,
AB-BC, AB-SK & AB-MATL: refer to ISO Rule 203.6: http://www.aeso.ca/rulesprocedures/18592.html

Prepared On: 2024-04-17   14:07:46


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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