Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2023-04-08

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
SUNCOR 15-Mar-23 08:00 13-Apr-23 18:00 29.42 Days
Continuous		 29EDD-71 29PT-237 (29EDD-71), 29EDD-71 752-4632 (29EDD-71), 29EDD-71 752-4631 (29EDD-71), 29EDD-71 29PS-249 (29EDD-71 Edd71Sub) maintenance  
CNRL, ATCO 22-Mar-23 07:30 10-Apr-23 18:00 19.44 Days
Continuous		 75-PLH-902 (838s Horizon Mining - 849s Joslyn Creek), 849s 260kV Bus 900BS2 (849s Joslyn Creek), 849s 903 (849s Joslyn Creek), 849s 906 (849s Joslyn Creek), 838s 75-BC-1911 (838s Horizon Mining), 838s 75-BC-1912 (838s Horizon Mining), 838s 75-SD-1911A (838s Horizon Mining), 838s 75-SD-1912B (838s Horizon Mining), 838s 75-SD-902 (838s Horizon Mining) ATCO 9L32-9L66 CNRL- Horizon Project: disconnect existing 75-PLH-902 from Horizon substation 75 and connect new bus Horizon substation 75  
ATCO 22-Mar-23 08:00 11-Apr-23 10:30 20.1 Days
Continuous		 849s 901T (849s Joslyn Creek) outage to 901T at 849s in coordination with 75-PLH-902 to CNRL  
ATCO 25-Mar-23 03:17 30-Apr-23 20:00 36.7 Days
Continuous		 813s SVC (813s Little Smoky) forced outage  
ALTALINK 30-Mar-23 17:01 13-Apr-23 07:59 13.62 Days
Continuous		 1080L (SS-25 - SS-65) forced outage  
SUNCOR 03-Apr-23 06:00 17-Apr-23 18:00 14.5 Days
Continuous		 29PL9-17 (29EDD-1 Millennium - 29EDD-94 Voyageur), 29EDD-1 952-104 (29EDD-1 Millennium), 29EDD-1 952-105 (29EDD-1 Millennium), 29EDD-94 29-952-9706 (29EDD-94 Voyageur), 29EDD-94 29-952-9705 (29EDD-94 Voyageur), 29EDD-1 29PS-410 (29EDD-1 Millennium), 29EDD-94 29PS-398 (29EDD-94 Voyageur), 29EDD-94 29PS-395 (29EDD-94 Voyageur), 29EDD-94 29PS-394 (29EDD-94 Voyageur) CBR project sync panel tie-in and IMS panel tie-in and bus corrective and preventative maintenance  
ATCO 03-Apr-23 10:00 14-Apr-23 16:45 11.28 Days
Continuous		 EX1-01L (402s Scotford Expansion One - 879s Upgrader), 879s 701T (879s Scottford Upgrader), 879s 152 (879s Upgrader), 879s 352 (879s Upgrader), 879s 701TD (879s Upgrader), 879s 52-LA (879s Upgrader) breaker maintenance 152 and 352, RTXP switch replacements for bus 1 PRC 005 relay and trip coil testing  
SUNCOR 05-Apr-23 08:00 11-Apr-23 18:00 6.42 Days
Continuous		 29EDD-34, 29EDD-34 29-952-133 (29EDD-34), 29EDD-34 29-952-132 (29EDD-34), 29EDD-34 29PT-340 (29EDD-34) Upgrade SEL330 Ground fault relay and Test for 29PT-340  
ATCO 07-Apr-23 15:30 17-Apr-23 09:00 9.73 Days
Continuous		 7L40 (733s Simonette - 813s Little Smoky), 813s 709 (813s Little Smoky), 813s 710 (813s Little Smoky) 813S Little Smoky rebuild - complete 7L40 wiring panel 7P5, 709, 710 CT/PT/P&C wiring, demo existing wiring/cabling, remove old panel 4G relay programming and functionality commission control, alarms and status  
ATCO 07-Apr-23 16:01 30-Apr-23 16:00 23 Days
Continuous		 9L32 (849s Joslyn Creek - 941s Bitumount), 9L66 (847s Muskeg River - 849s Joslyn Creek) stage 3 for 9L66/9L32 reconnection  
ATCO 09-Apr-23 08:00 22-Apr-23 17:00 13.38 Days
Continuous		 757S 704B, 757s 704B (757s Battle River) work on 704B switch  
SUNCOR 10-Apr-23 06:00 24-Apr-23 18:00 14.5 Days
Continuous		 29PL9-4 (29EDD-1 Millennium - 29EDD-3) 29PS-196 Closing Concerns  
ENMAX, ALTALINK 10-Apr-23 07:00 15-Apr-23 16:00 5.38 Days
Continuous		 1107L (SS-65 - SS-237), 1107L (237s Foothills - SS-65) 65 sub cable trench replacement  
Syncrude 10-Apr-23 08:00 11-Apr-23 20:00 1.5 Days
Continuous		 Significant Outage: Require outage to replace the motor on MOD 520 in D05 substation. The following motor operated disconnect switches will be operated: 519B @ D05 Substation 520 @ D05 Substation 517A @ D05 Substation 215 @ G01 Substation, D05 520 (D05) Significant Outage: Require outage to replace the motor on MOD 520 in D05 substation.

The following motor operated disconnect switches will be operated:
519B @ D05 Substation
520 @ D05 Substation
517A @ D05 Substation
215 @ G01 Substation		  
SUNCOR 11-Apr-23 08:00 21-Apr-23 20:00 10.5 Days
Continuous		 PL9-4 line prot and Gen setting change, 29PL9-4 (29EDD-1 Millennium - 29EDD-3), 29EDD-3 29PT-5 (29EDD-3) PL9-4
29PT-5		  
BCH 11-Apr-23 09:00 28-Apr-23 17:00 17.33 Days
Continuous		 T4 (BCH Natal) Replace NTL 2CT2 AB-BC
ALTALINK 11-Apr-23 09:15 14-Apr-23 17:45 3.35 Days
Continuous		 1082L (63s - 287s) GOI, 1082L (63s Red Deer - 287s Hazelwood) Replace glass and tower hardware str. 1-60 FRM  
EPCOR, ALTALINK 11-Apr-23 09:30 13-Apr-23 17:00 2.31 Days
Continuous		 1238L Zone @ Genesee 330P, 1238L (330p Genesee - 510s Sunnybrook) Genesee: 1238L Zone CVT(1201)/Arrestor(1201) Doble  
EPCOR, ALTALINK 11-Apr-23 09:30 13-Apr-23 17:00 2.31 Days
Continuous		 1045L @ Jasper Terminal E805S and Sundance 310P and Keephills 320P, 1045AL (320p Keephills - 1045L tap), 1045L (310p Sundance - 1045AL tap), 1045L (EP 805s Jasper - 1045AL tap) Jasper: 1045L Surge Arrestor LCR  
ENMAX, ALTALINK 11-Apr-23 12:00 11-Apr-23 18:00 6 Hours
Continuous		 28.80L (42s Sarcee - SS-28). 28.2TR (SS-28), 28.80L (42s Sarcee - SS-28), 28.2TR (SS-28) Spring Substation Washing. SW 80 -Retrieve Nameplate Info. Check reversing switch.  
ALTALINK 11-Apr-23 12:30 13-Apr-23 17:30 2.21 Days
Continuous		 83s172W (172L) - GOI, 172L (83s Taber - 172EL tap) PRC5 breaker maintenance. 1st Trip first  
ALTALINK 11-Apr-23 12:30 13-Apr-23 17:30 2.21 Days
Continuous		 65s753E (753L) - GOI, 753L (65s High River - 253s Blackie) PRC5 breaker maintenance. 1st Trip first  
ATCO 12-Apr-23 07:00 12-Apr-23 23:00 16 Hours
Continuous		 7L35, 7L574, 7L35 (859s Primrose - 7L35 tap), 7L574 (822s Wolf Lake - 7L574 tap), 7L574 (970s Bourque - 7L574 tap) Require GOI on 7L35 for pole change.
Change 144kV 67A & 82A as part of mitigation from test & treat for CNRL.		  
ATCO 12-Apr-23 07:00 13-Apr-23 07:00 24 Hours
Continuous		 7L35 (859s Primrose - 7L35 tap) pole replacements  
SUNCOR 12-Apr-23 08:00 18-Apr-23 18:00 6.42 Days
Continuous		 29EDD-34, 29EDD-34 29PT-341 (29EDD-34), 29EDD-34 29-952-142 (29EDD-34), 29EDD-34 29-952-143 (29EDD-34) Upgrade SEL330 Ground fault relay and Test for 29PT-341  
ALTALINK 12-Apr-23 09:00 13-Apr-23 16:00 31 Hours
Continuous		 410s T2 TX18133 - GOI, 410s T2 (410s Josephburg) Transformer maintenance.  
ALTALINK 13-Apr-23 08:00 17-Apr-23 08:00 4 Days
Continuous		 255s34 (180L) GOI, 180L (255s Vulcan - 928s East Stavely), 255s 34 (255s Vulcan) Breaker Outage at 255s Vulcan to demo old 180L line protections and install new ‘A’ and ‘B’ protections. Add new maintenance switch 43M/452 (breaker 255s34)  
ALTALINK 13-Apr-23 09:00 02-May-23 09:00 19 Days
Continuous		 1080L(C25s - C65s) GOI, 1080L (SS-25 - SS-65) Civil work to replace 1080L Phase "C" cable.  
ALTALINK, ATCO 13-Apr-23 10:00 13-Apr-23 15:00 5 Hours
Daily		 395s77E (7L77) – GOI, 395s 77E (395s North Holden), 7L77 (395s North Holden - 709s Vegreville) 395s77E (252) Outage to Demo existing interchange meter and indicating meters  
ALTALINK 14-Apr-23 08:00 14-Apr-23 17:00 9 Hours
Continuous		 275s T2(Tx18458) GOI, 275s T2 (275s Jenner) Confirm Operation and Alignment of 275s47  
SUNCOR 14-Apr-23 08:00 18-Apr-23 20:00 4.5 Days
Continuous		 29EDD1S6), 29PL9-4 (29EDD-1 Millennium - 29EDD-3) Millennium 260kV bus jumper replacement related to existing 29PL9-4  
ALTALINK 15-Apr-23 08:30 16-Apr-23 16:30 1.33 Days
Daily		 237s T1 (Tx 18904) - GOI, 237s T1 (237s Foothills) PRC5 Doble Maintenance and IDD  
ATCO 16-Apr-23 07:00 30-Apr-23 17:30 14.44 Days
Continuous		 7L65, 7L65 (709s Vegreville - 7LA65 tap), 7L65 (710s Vermilion - 7LA65 tap), 7LA65 (708s Grizzly Bear - 7L65 tap) 7L65 Rebuild Project.

Will need total line outage from Apr. 18 07:00 - 12:00, 2023
- Isolation points 709S 7L65D1, 710S 703A, 7LA65D1
Apr. 18 12:01 - Apr. 30 17:30, 2023 shrink GOI
- Isolation points 710S 703A and Jumper J2
Apr. 30 07:00 - 11:59 Phase in new portion of 7L65 that feeds east
- After phasing is confirmed, close 7L65D3 and breaker 703 at 710S.
- Need to remove flying taps off of west portion to 709S
Apr. 30 12:00 - 17:30
- Isolation Points 709S 7L65D1, 7L65D2		  
ENMAX 17-Apr-23 07:00 18-Apr-23 16:00 1.38 Days
Continuous		 65B240-D135 (SS-65) 65 sub cable trench replacement  
EPCOR, ALTALINK 17-Apr-23 07:00 21-Apr-23 17:00 4.42 Days
Continuous		 1055L and 240BA3 @ Petrolia E816S and Argyll Transfer Station E629S, 1055L (629s Argyll Transfer Station - 816s Petrolia), 240BA3 (629s Argyll Transfer Station - 814s Bellamy) Argyll ADS2 Disconnect Maintenance, 240BA3 CT/Arrestor Doble and Petrolia 1055L CT/CVT/Arrestor Doble  
EPCOR 17-Apr-23 07:00 21-Apr-23 17:00 4.42 Days
Continuous		 TX4 @ Cloverbar E987S, 987s T4 (987s Clover Bar) Cloverbar: TX4 Doble  
ALTALINK 17-Apr-23 07:30 21-Apr-23 16:30 4.38 Days
Continuous		 510s AC Filter Bank #2 Bus – GOI, 510s ACF21 (510s Sunnybrook), 510s ACF22 (510s Sunnybrook) Cap replacement, filter bank inspection, Breaker Dashpot Inspection, 6MD66 and TDC maintenance.  
BCH 17-Apr-23 08:00 17-Apr-23 08:30 30 Mins
Continuous		 5L94 (BCH Cranbrook - 102s Langdon) isolate reactor at Cranbrook
AB-BC
BHE Canada 17-Apr-23 08:00 17-Apr-23 08:30 30 Mins
Continuous		 MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
ALTALINK 17-Apr-23 08:00 17-Apr-23 09:00 60 Mins
Daily		 1201L (520s - B2s) Den-energized for BCH, 1201L (520s Bennett - BCH Cranbrook) to isolated CBK 5RX5. AB-BC
ALTALINK 17-Apr-23 08:01 21-Apr-23 08:00 4 Days
Continuous		 15s180N GOI, 180L (15s Fort Macleod - 180AL tap), 15s 180N (15s Fort Macleod) Breaker Outage at 15s Fort Macleod to demo old 180L line protections and install new ‘A’ and ‘B’ protections. Relocate B85/L5(15s 180L teleprotection logic processor) to new control building. Replace 15s180N breaker fail relay, trips to be tied in live and trip tested during later outages. Add new maintenance switch 43M/552 (breaker 15s180N)  
ALTALINK 17-Apr-23 09:30 21-Apr-23 17:00 4.31 Days
Continuous		 966L (650s-A932s) - GOI, 966L (650s Hansman Lake - 932s Pemukan) RAS201: Implement 966L LTO signals to send to ATCO. Add 43m breaker maintenance switches to 650s452 and 650s552 Requires 650s452 and 650s552 OOS for commissioning new signals to ATCO. Coordinated with ATCO See Also SAP: 283607 for advices being issued to ATCO at the same time,  
ATCO 17-Apr-23 09:30 21-Apr-23 17:30 4.33 Days
Continuous		 932S 904, 932S 905, 9L966, 9L966 (650s Hansman Lake - 932s Pemukan), 932s 904 (932s Pemukan), 932s 905 (932s Pemukan) Modifications to RAS 201 to include 9L966/966L LTO  
ATCO 17-Apr-23 10:00 17-Apr-23 13:00 3 Hours
Continuous		 848S 905, 848s 905 (848s Ruth Lake) PRC Trip Coil Testing  
ATCO 17-Apr-23 10:00 25-Apr-23 16:00 8.25 Days
Continuous		 740S 701B, 740s 701B (740s H.R. Milner) Replace Damaged switch Arm on 701B  
ATCO 17-Apr-23 10:00 28-Apr-23 16:45 11.28 Days
Continuous		 879S 352, 879S 252, 879S 702T, ALC02L, ALC02L (409s Shell Scotford - 879s Upgrader), 879s 702T (879s Scotford Upgrader) 252, 352 Complete Breaker Maintenance
RTXP Switch Replacements for Bus 2
PRC 005 Relay and trip coil testing		  
ALTALINK 17-Apr-23 12:30 17-Apr-23 17:30 5 Hours
Daily		 42s70 - Urgent Open Breaker Advice, 42s 70 (42s Sarcee) 42s72 has been reported as being hot and needs to be operated several times  
ATCO 17-Apr-23 13:01 17-Apr-23 16:00 2.98 Hours
Continuous		 848S 907, 848s 907 (848s Ruth Lake) PRC Trip Coil Testing  
EPCOR, ALTALINK 18-Apr-23 07:00 18-Apr-23 17:00 10 Hours
Continuous		 920L @ Castledowns E557S and Lamoureux 71S, 920L (71s Lamoureux - 557s Castle Downs) 920L: Protection Blocking for AltaLink Maintenance. Redundant protection to remain in service at all times.  
Med Hat, CMH 18-Apr-23 07:00 18-Apr-23 19:00 12 Hours
Continuous		 MH69-65L, MH-65L (MHS-7 Brier Park - Cancarb Energy Medicine Hat) Maintenance on 69kV disconnect switch SW-900 ; Issue GOI  
ALTALINK 18-Apr-23 08:30 20-Apr-23 13:30 2.21 Days
Continuous		 170s T1 TX18888 - GOI, 170s T1 (170s Pike) PRC5 maintenance, fix tap changer, replace hydran battery, test transformer  
ATCO 18-Apr-23 09:30 20-Apr-23 16:00 2.27 Days
Continuous		 930S Synchronous Condenser, 930S 406T, 930s Syn Condenser (930s Arcenciel) sync condenser maintenance, 406T maintenance, AHU fall service  
ATCO 18-Apr-23 10:00 18-Apr-23 13:00 3 Hours
Continuous		 848S 908, 848s 908 (848s Ruth Lake) PRC Trip Coil Testing  
ATCO 18-Apr-23 13:01 18-Apr-23 16:00 2.98 Hours
Continuous		 848S 913, 848s 913 (848s Ruth Lake) PRC Trip Coil Testing  
ENMAX 19-Apr-23 07:00 20-Apr-23 16:00 1.38 Days
Continuous		 65B240-D132 (SS-65) 65 sub cable trench replacement  
ALTALINK 19-Apr-23 08:00 23-Apr-23 17:00 4.38 Days
Continuous		 349s Station, 349s Stavely 1st Scope: Replace 349s10 breaker 2nd scope: Implement new AIS scheme for 349s14  
ALTALINK 19-Apr-23 09:00 21-Apr-23 17:30 2.35 Days
Continuous		 28s T1(TX18701) GOI, 28s T1 (28s West Brooks) LTC MR Diverter Oil Flush, Inspection, and Oil Replacement  
ATCO 19-Apr-23 10:00 19-Apr-23 13:00 3 Hours
Continuous		 848S 911, 848s 911 (848s Ruth Lake) PRC Trip Coil Testing  
ATCO 19-Apr-23 13:01 19-Apr-23 16:00 2.98 Hours
Continuous		 848S 910, 848s 910 (848s Ruth Lake) PRC Trip Coil Testing  
SUNCOR 20-Apr-23 08:00 27-Apr-23 18:00 7.42 Days
Continuous		 29-752-4613 29-752-4614, 29EDD-71 752-4613 (29EDD-71), 29EDD-71 752-4614 (29EDD-71) 29EDD71;29-752-4613 MAINT & TEST;PM 10y
29EDD71;29-752-4614 MAINT & TEST;PM 10y		  
ALTALINK 20-Apr-23 09:30 20-Apr-23 16:00 6.5 Hours
Daily		 678s850 (850L) - GOI, 850L (525s Carseland - 678s Okotoks) PRC5 1st trip followed by maintenance.  
ALTALINK 21-Apr-23 08:01 23-Apr-23 16:30 2.35 Days
Continuous		 180L(15s-928s-255s-604s) GOI, 15s 180N (15s Fort Macleod), 255s 34 (255s Vulcan), 180AL (604s Granum - 180L tap), 180L (15s Fort Macleod - 180AL tap), 180L (255s Vulcan - 928s East Stavely), 180L (928s East Stavely - 180AL tap) Line outage required for full commissioning and testing of new line relays at 15s and 255s on 180L, 15s B85/L5 (15s 180L teleprotection logic processor), and settings changes to 604s teleprotection relays.  
SUNCOR 24-Apr-23 06:00 07-May-23 18:00 13.5 Days
Continuous		 29PL9-14, 29PL9-14 (29EDD-34 - 29EDD-56) 29PL9-14@29EDD34  
EPCOR 24-Apr-23 07:00 26-Apr-23 17:00 2.42 Days
Continuous		 TX1 @ Dome E665S, 665s T1 (665s Dome) Dome: TX1 Surge Arrestor LCR  
EPCOR, ALTALINK 24-Apr-23 07:00 28-Apr-23 17:00 4.42 Days
Continuous		 1209L Zone @ Genesee 330P, 1209L (89s Ellerslie - 330p Genesee) Genesee: 1209L- P&C Relay Maintenance  
EPCOR 24-Apr-23 07:00 29-Apr-23 17:00 5.42 Days
Continuous		 TX3 Zone @ Jasper Terminal E805S, 805s T3 (805s Jasper) Jasper: TX3/CVT/Arrestor Doble and JAB3/JDS9/JDS8/ Disconnect Maintenance  
ATCO 24-Apr-23 08:00 27-Apr-23 17:30 3.4 Days
Continuous		 12L41, 939S APL -Station General Equipment, 12L41 (510s Sunnybrook - 939s Livock) Outage is contingent on external customer outage.

PRC-005 trip coil tests & breaker timing tests on 1206, 1207, 1214, & 1216.

Relay firmware upgrades, password updates on multiple devices on site.		  
ATCO 24-Apr-23 08:00 27-Apr-23 17:30 3.4 Days
Continuous		 12L44, 951S 1201T, 12L44 (939s Livock - 951s Thickwood Hills), 951s 1201T (951s Thickwood Hills) Outage is contingent on external customer outage.

PRC-005 trip coil tests & breaker timing tests on 1205, 1206, 1213.

Relay firmware upgrades, password updates on multiple devices on site.		  
ALTALINK 24-Apr-23 08:00 28-Apr-23 16:00 4.33 Days
Continuous		 511s SVC Plus - GOI, AML 511s SVC Plus (AML 511s Crossings) Annual SVC Plus inspection, VCS work, Fence repair  
ATCO 24-Apr-23 08:00 01-May-23 17:00 7.38 Days
Continuous		 838S 905, 838S 906 ATCO 9L32-9L66 CNRL- Horizon Project
GOI for Construction of 838S Horizon Expansion Sub
9L32 connected at 838S Horizon Expansion and all permanent schemes involving 838S to be in place through Siemens A protection		  
ATCO 24-Apr-23 09:00 01-May-23 10:00 7.04 Days
Continuous		 7L32, 7L32 (813s Little Smoky - 862s South Bezanson) 813S Little Smoky Rebuild
BKR 701 and 702 P&C wiring in panel 7P1, prep work
Demo panel 1G
Relay programming and functionality
Commission control, alarms and status		  
ATCO 24-Apr-23 12:00 27-Apr-23 15:30 3.15 Days
Continuous		 7L794, 819S 702, 7L794 (157s Lac La Biche - 819s Whitby Lake), 819s 702 (819s Whitby Lake) 702 Complete Maintenance
Open end 7L794 Line		  
ALTALINK 24-Apr-23 12:00 27-Apr-23 18:00 3.25 Days
Continuous		 74s T1 (Tx 18570) - GOI, 74s T1 (74s Janet) T1 Maint, Doble, Leak repairs, PRC5 Work  
ALTALINK 24-Apr-23 13:00 27-Apr-23 17:00 3.17 Days
Continuous		 338s T1 - GOI, 338s T1 (338s Cherhill) Transformer maintenance.  
ALTALINK 24-Apr-23 13:00 27-Apr-23 17:00 3.17 Days
Daily		 74s2452 GOI, 74s 2452 (74s Janet) PRC 1st Trip breaker testing and maintenance  
ALTALINK 25-Apr-23 06:15 27-Apr-23 17:45 2.48 Days
Continuous		 851L (253s - 525s) GOI, 851L (253s Blackie - 525s Carseland) LCM; installing Horizontal line posts on structures 184-186 and an Arm extension on structure 182  
ALTALINK 25-Apr-23 08:30 27-Apr-23 15:30 2.29 Days
Continuous		 225s225E (225L) - GOI, 225s 225E (225s Magrath), 225L (225s Magrath - 225AL tap) Install and commissioning new RAS 206 ‘A’ and ‘B’ relays, complete SCADA work, telecom equipment and testing to new 967s Red Coat customer substation  
ALTALINK 26-Apr-23 10:00 26-Apr-23 14:00 4 Hours
Daily		 250p 11 (250p Bighorn Plant) maintenance  
ALTALINK 27-Apr-23 08:00 27-Apr-23 11:00 3 Hours
Daily		 15s463 Advice, 15s 463 (15s Fort Macleod) Trip test from new 15s180N breaker fail  
ALTALINK 27-Apr-23 10:00 27-Apr-23 14:00 4 Hours
Daily		 250p 22 (250p Bighorn Plant) maintenance  
ALTALINK 01-May-23 07:15 05-May-23 17:45 4.44 Days
Continuous		 616L (59s - 383s - 103s) GOI, 616L (103s Goose Lake - 616AL tap), 616L (59s Peigan - 616AL tap) FRM Component Replacement (str 53-178)  
ENMAX, ALTALINK 01-May-23 08:00 01-May-23 16:00 8 Hours
Continuous		 693L (42s Sarcee - SS-10) HV breaker maintenance 10B138-693L  
ENMAX 01-May-23 08:00 10-May-23 16:00 9.33 Days
Continuous		 23.80L, 23.80L (74s Janet - SS-23) Move 5 poles to expand 50 ave SE. TLR Construction (TLR - Great Plains Starfield Area 6 - 50 AV & 52 ST SE (east of 4948 52 ST SE)  
SUNCOR 01-May-23 08:00 14-May-23 18:00 13.42 Days
Continuous		 29EDD-1, 29EDD-1 Millennium, 29EDD-1 260kV North Bus 2 (29EDD-1 Millennium) N260B1 + Relays, 29CVT-11, 29PS-72/76.
29EDD-1S1/1S7/1S13/1S452/1S152 + Relays,
952-101/104 + Controller + Relays		  
BCH 01-May-23 09:00 05-May-23 17:00 4.33 Days
Continuous		 5L75 (BCH Ashton Creek - BCH Revelstoke G.S.) replace end of life insulators AB-BC
ATCO 01-May-23 09:00 02-Jun-23 17:30 32.35 Days
Continuous		 13L50 (DC LINK), 13L50 (2029s Heathfield - 2075s Newell) HMI IT Upgrades AT 2075s & 2029s.

2029s & 2075s DC Maintenance.		  
ATCO 01-May-23 09:30 03-May-23 16:00 2.27 Days
Continuous		 749S 703, 749S 704, 749S 7L33 CHANNEL A TP FAIL, 749S 7L33 CHANNEL B TP FAIL, 749S 7L33 Protection Relay, 7L33, 749s 703 (749s Flyingshot Lake), 749s 704 (749s Flyingshot Lake), 7L33 (749s Flyingshot Lake - 7LA33 tap) Replace Damaged RTXP switches for 7L33 relays  
EPCOR, ALTALINK 01-May-23 09:30 05-May-23 17:00 4.31 Days
Continuous		 D2403 (909LW) @ Dome E665S, 909L (310p Sundance - 665s Dome) Dome: D2403 Breaker Maintenance and DDS7 Disconnect Maintenance  
ATCO 01-May-23 09:30 14-May-23 17:00 13.31 Days
Continuous		 849S 9L08 Protection Relay, 9L08, 849S 905, 849S 906, 9L08 (849s Joslyn Creek - 888s Dover), 849s 906 (849s Joslyn Creek), 849s 905 (849s Joslyn Creek) 849s 9L08 Protection upgrades,
Demo old 75-PLH-902 protection
900BS2 updates
update existing 9L08 wiring and outputs to incorporate new DFR and new 900BS2 panels.		  
ALTALINK, ATCO 01-May-23 11:00 01-May-23 15:00 4 Hours
Continuous		 7L230 (69s-234s-743s) Advice for ATCO, 7L230 (69s North Barrhead - 888AL tap), 888AL (234s Fort Assiniboine - 7L230 tap), 7L230 (743s Sarah Lake - 888AL tap) Line Mitigation Work - ATCO  
ATCO 01-May-23 12:00 05-May-23 15:00 4.13 Days
Continuous		 7L230, 7L230 (743s Sarah Lake - 888AL tap) Line Mitigation Work
2023-04-24 12:00 to 14:00 - complete 7L230 outage, 234S Ft. Assiniboine will be without power
Isolation points: 743S 7L230D1, 69s16 at 69S Barrhead and 234s1 at 234S Ft. Assiniboine
ATCO to Open Jumper 7L230 J1
2023-04-24 14:00 to 2023-04-28 12:00
ATCO GOI on 7L230
Isolation points: 743S 7L230D1, 7L230 J1
2023-04-28 12:00-14:00 - complete l7L230 outage, 234S Ft. Assiniboine will be without power
Isolation points: 743S 7L230D1, 69s16 at 69S Barrhead and 234s1 at 234S Ft. Assiniboine
ATCO to Close Jumper 7L230 J1
7L230 restored to normal.		  
ALTALINK 01-May-23 12:30 11-May-23 17:30 10.21 Days
Continuous		 64s T1 (Tx 18514) - GOI, 64s T1 (64s East Crossfield) Refurbish TX and repair leaks  
CNRL, ATCO 01-May-23 22:00 31-May-23 22:00 30 Days
Continuous		 859s 701T (859s Primrose), 859s 701 (859s Primrose), 859s 704 (859s Primrose), 859s 701TD (859s Primrose) maintenance  
ALTALINK 02-May-23 08:00 03-May-23 17:30 1.4 Days
Continuous		 17s16 (C1) GOI, 17s C1 (17s Benalto) Repair closing dashpots  
ALTALINK 02-May-23 08:00 04-May-23 14:00 2.25 Days
Continuous		 72sT2 (Tx18766) – GOI, 72s T2 (72s Leismer) Transformer maintenance, doble, install Coresense & Qualitrol  
ATCO 02-May-23 09:00 03-May-23 16:00 31 Hours
Continuous		 7L89, 700S 703, 7L89 (721s La Corey - 826s Marguerite Lake), 700s 703 (700s Bonnyville) 700S 703 Maintenance,  
Saskpower 02-May-23 09:00 12-May-23 18:00 10.38 Days
Continuous		 SaskPower C1S SPC maintenance AB-SK
ATCO 02-May-23 10:00 04-May-23 16:00 2.25 Days
Continuous		 7L20, 7L20 (740s H.R. Milner - 810s Dome Cutbank) Line Mitigation  
ATCO, ALBIAN 02-May-23 10:00 04-May-23 17:30 2.31 Days
Continuous		 920S 902T, 920s 902T (920s Jackpine) Leak mitigation on 902T  
ATCO 04-May-23 13:00 04-May-23 14:00 60 Mins
Continuous		 800S 701, 7L75, 7L75 (ATC 793s West Peace River - 800s Friedenstal), 800s 701 (800s Friedenstal) Testing 730S SVS reaction to loss of 7L75  
ATCO 04-May-23 14:01 04-May-23 15:00 59 Mins
Continuous		 730S 704, 7L68, 7L68 (730s Rycroft - 811s Clairmont Lake), 730s 704 (730s Rycroft) Testing 730S SVS reaction to loss of 7L68  
ATCO 04-May-23 14:02 04-May-23 20:00 5.97 Hours
Continuous		 730S 704, 7L68, 7L68 (730s Rycroft - 811s Clairmont Lake) Testing 730S SVS reaction to loss of 7L68  
ALTALINK, ATCO 05-May-23 11:00 05-May-23 15:00 4 Hours
Daily		 7L230 (69s-234s-743s) Advice for ATCO, 7L230 (69s North Barrhead - 888AL tap), 888AL (234s Fort Assiniboine - 7L230 tap), 7L230 (743s Sarah Lake - 888AL tap) Line Mitigation Work - ATCO  
ENMAX, ALTALINK 06-May-23 08:00 07-May-23 18:00 1.42 Days
Continuous		 771L (SS-47 - SS-162) HV SW Maint. SW81, SW86. Washing  
Lethbridge, ALTALINK 07-May-23 08:00 07-May-23 17:00 9 Hours
Continuous		 667L (146s), 667L (146s MacDonald - 370s North Lethbridge) OPEN END TO INSTALL NEW PROTECTIONS ,TEST/TRIP 146S667L BREAKER  
SUNCOR 08-May-23 06:00 21-May-23 18:00 13.5 Days
Continuous		 29PL9-15, 29PL9-15 (29EDD-34 - 29EDD-56) 29PL9-15@29EDD34  
EPCOR 08-May-23 07:00 08-May-23 17:00 10 Hours
Continuous		 TX1 @ Castledowns E557S, 557s T1 (557s Castle Downs) Castledowns: TX1 Measurements for Engineering  
ALTALINK 08-May-23 07:00 08-May-23 18:00 11 Hours
Continuous		 707L (54s-166s) - GOI, 707L (54s Fort Saskatchewan - 166s Dow Chemical Fort Saskatchewan) FRM component replacement 707L (str 1-35)  
BCH 08-May-23 09:00 12-May-23 17:00 4.33 Days
Continuous		 5L77 (BCH Ashton Creek - BCH Revelstoke G.S.) replace end of life insulators AB-BC
ALTALINK 08-May-23 09:15 11-May-23 15:45 3.27 Days
Continuous		 901L (63s - 64s - 74s) GOI, 901AL (64s East Crossfield - 901L tap), 901L (63s Red Deer - 901AL tap), 901L (74s Janet - 901AL tap) FRM Str 3-370  
ATCO 08-May-23 10:00 11-May-23 17:00 3.29 Days
Continuous		 7L80, 7L80 (733s Simonette - 857s Kakwa Ridge), 7L80 (740s H.R. Milner - 857s Kakwa Ridge) Line mitigation, Cross arm replacement  
ALTALINK 08-May-23 12:00 11-May-23 18:00 3.25 Days
Continuous		 69sT4 (Tx18298) – GOI, 69s T4 (69s North Barrhead) Transformer maintenance, fix leaks, test transformer.  
ALTALINK 08-May-23 12:30 11-May-23 17:30 3.21 Days
Continuous		 310p1252 - GOI, 310p 1252 (310p Sundance) Maintenance on 310p1252 including 1st trips  
ALTALINK 09-May-23 07:00 09-May-23 18:00 11 Hours
Continuous		 787L (71s-787L29) - GOI, 787L (71s Lamoureux - 787AL tap) FRM component replacement 787L (Str 14-26)  
EPCOR 09-May-23 07:00 13-May-23 17:00 4.42 Days
Continuous		 TX3 @ Cloverbar E987S, 987s T3 (987s Clover Bar), 987s C2407 (987s Clover Bar) Cloverbar: TX3 Doble  
CNRL 09-May-23 07:30 25-May-23 18:00 16.44 Days
Continuous		 838s 75-TR-2801 (838s Horizon Mining) 260kV 5YR PM  
ALTALINK 09-May-23 09:30 11-May-23 15:30 2.25 Days
Continuous		 895s100 (100L) - GOI, 895s 100 (895s Suffield) 895s100 Gas Analyze and top up  
ALTALINK 09-May-23 10:00 09-May-23 16:00 6 Hours
Daily		 20s 138kV South BUS GOI, 20s 138kV South Bus (20s Ghost) 138kv South Bus outage to complete wiring changes in CVT1 heads and JBCVT1.  
ALTALINK 10-May-23 07:00 10-May-23 18:00 11 Hours
Daily		 787L (166s-787L33) - GOI, 787L (166s Dow Chemical Fort Saskatchewan - 787AL tap) FRM component replacement 787L (Str 37-39)  
ALTALINK 10-May-23 09:00 10-May-23 15:00 6 Hours
Daily		 20s 138kV North BUS GOI, 20s 138kV North Bus (20s Ghost) 138kv North Bus outage to complete wiring changes in VT2 heads and JBVT2  
ATCO 10-May-23 10:00 10-May-23 17:30 7.5 Hours
Continuous		 801S 907, 801S 908, 9L933, 801S 9L933D1 (801s Anderson) Operate 907 & 908 breakers to investigate multiple spring charge failures on 908  
ALTALINK 12-May-23 07:30 14-May-23 18:00 2.44 Days
Continuous		 38s 240kV Bus 2 & Tx18700 (T4) - GOI, 38s T4 (38s East Edmonton), 38s 7452 (38s East Edmonton), 38s 7352 (38s East Edmonton), 38s 18 (38s East Edmonton) 38s T4 PRC5 testing, maintenance, & fix leaks. 38s57 hotspot repair  
ENMAX, ALTALINK 15-May-23 07:00 20-May-23 16:00 5.38 Days
Continuous		 1106L (SS-65 - SS-237), 1106L (237s Foothills - SS-65), 65B240-D130 (SS-65), 65B240-D131 (SS-65) 65 sub cable trench replacement  
EPCOR 15-May-23 07:00 20-May-23 17:00 5.42 Days
Continuous		 CD2405 @ Casltledowns E557S, 557s CD2405 (557s Castle Downs) Castledowns: CD2405 Breaker Maintenance and CT Doble  
ENMAX, ALTALINK 15-May-23 08:00 16-May-23 16:00 1.33 Days
Continuous		 833L (SS-2 - SS-12) HV breaker maintenance 12B138-833L  
ALTALINK 15-May-23 08:00 19-May-23 18:00 4.42 Days
Continuous		 863L (226s - 415s) - GOI, 863L (225s Magrath - 891L tap), 863L (618s Riverbend - 891L tap) 618s863X CT replacement, 618s863X breaker maintenance, 225s863N circuit switcher maintenance, 225s2 switch maintenance, 863L protection upgrade, MPLS node upgrades (225s, 226s, 618s), PMU salvage @ 226s, 225s T1 – tap-changer through neutral, 225s T1 – Doble test, 225s T1 – tap-changer maintenance, 225s T1 – rad leak, 225s T1 – fall arrest plates, 225s T1 – oil leaks and 225s4 breaker maintenance  
ATCO 15-May-23 08:00 24-May-23 17:00 9.38 Days
Continuous		 7L129, 7L129 (710s Vermilion - 7LA129 tap) 7L65 Rebuild. Installing new 7L129 structures, re stringing conductor  
ALTALINK 15-May-23 09:15 19-May-23 15:45 4.27 Days
Continuous		 901L (63s - 64s - 74s) GOI, 901AL (64s East Crossfield - 901L tap), 901L (63s Red Deer - 901AL tap), 901L (74s Janet - 901AL tap) FRM Str 3-370  
ATCO 15-May-23 09:30 28-May-23 17:00 13.31 Days
Continuous		 888S 9L09 Protection Relay, 9L09, 849S 902, 849S 903, 849S 901, 9L09 (849s Joslyn Creek - 888s Dover), 849s 902 (849s Joslyn Creek), 849s 903 (849s Joslyn Creek) 849s 9L09 Protection upgrades,
update existing 9L09 wiring and outputs to incorporate new DFR and new 900BS2 panels.
demo and replace the 9L66 protection not 75-PLH-902. New 900BS2 panel will not be added		  
ATCO 15-May-23 10:00 29-May-23 10:00 14 Days
Continuous		 7L45, 7L45 (798s Bridge Creek - 813s Little Smoky) 813S Little Smoky Rebuild813S Little Smoky Rebuild
BKR 703 and 704 P&C wiring, remove old panel 7G, set up new panel 7P4, prep work
Relay programming and functionality
Commission control, alarms and status		  
ALTALINK 15-May-23 10:30 18-May-23 17:30 3.29 Days
Daily		 74s2152 - GOI, 74s 2152 (74s Janet) 1st Trip PRC5 Breaker Maintenance  
ATCO 15-May-23 12:00 20-May-23 17:30 5.23 Days
Continuous		 7L45 (798s Bridge Creek - 813s Little Smoky), 7L45 7L45D2 switch replacement
7L45 between 845S Big Mountain and 798S Bridge Creek to remain in service		  
ALTALINK 15-May-23 13:30 18-May-23 17:30 3.17 Days
Continuous		 163s1252 - GOI, 163s 1252 (163s Amoco Empress) 1st Trip PRC5 Breaker Maintenance  
CNRL 16-May-23 07:30 25-May-23 18:00 9.44 Days
Continuous		 838s 75-TR-2801 (838s Horizon Mining), 838s 75-TR-1701 (838s Horizon Mining) 260kV 5YR PM  
ALTALINK 16-May-23 08:00 16-May-23 16:30 8.5 Hours
Daily		 338s552 - GOI, 338s 552 (338s Cherhill) Doble 3 CT's and take oil samples on 338s552 CT's (CT5)  
ALTALINK 16-May-23 08:30 16-May-23 17:30 9 Hours
Daily		 154s252 - GOI, 154s 252 (154s Black Spruce) Replace broken bolt in the mechanism  
CNRL 17-May-23 07:30 26-May-23 18:00 9.44 Days
Continuous		 75-PLH-904 (838s Horizon Mining - 842s Horizon Upgrading), 842s 75-TR-5701 (842s Horizon Upgrading), 842s 75-TR-8701 (842s Horizon Upgrading) 260kV 5YR PMs and Protective Relay Upgrades  
ENMAX, ALTALINK 17-May-23 08:00 18-May-23 16:00 1.33 Days
Continuous		 832L (SS-10 - SS-12) HV breaker maintenance 12B138-832L  
ALTALINK 17-May-23 08:30 17-May-23 17:30 9 Hours
Daily		 154s352 - GOI, 154s 352 (154s Black Spruce) Tighten phase B & C poles are loose  
ALTALINK 17-May-23 23:00 18-May-23 03:00 4 Hours
Daily		 62s 11 (62s Brazeau Plant) maintenance  
ALTALINK 18-May-23 03:00 18-May-23 07:00 4 Hours
Daily		 62s 12 (62s Brazeau Plant) maintenance  
SUNCOR 22-May-23 06:00 04-Jun-23 18:00 13.5 Days
Continuous		 29PP-45 @ 29EDD-34, 29EDD-34 29-952-143 (29EDD-34), 29EDD-34 29-952-133 (29EDD-34), 29EDD-34 29-952-113 (29EDD-34), 29EDD-34 29-952-123 (29EDD-34) 29EDD34;29PP-45 SYSTEM and 29PT-224 SSVT  
EPCOR, ALTALINK 23-May-23 07:00 23-May-23 17:00 10 Hours
Continuous		 909LE @ Dome 665S and Ellerslie 89S, 909L (89s Ellerslie - 665s Dome) Dome: 909LE Surge Arrestor stand off repair (043536)  
EPCOR, ALTALINK 23-May-23 07:00 26-May-23 17:00 3.42 Days
Continuous		 908LE Zone @ Petrolia E816S and Ellerslie 89S, 908L (89s Ellerslie - 816s Petrolia) Petrolia: 908LE Zone CVT/CT/Arrestor Doble  
EPCOR 23-May-23 07:00 02-Jun-23 17:00 10.42 Days
Continuous		 TX2 Zone @ Bellamy E814S, 814s T2 (814s Bellamy) Bellamy: Apparatus First Week- TX2 Doble and Arrestor/PT Doble, P&C Second Week- Bellamy TX2 Zone P&C Maintenance  
ALTALINK 23-May-23 10:30 23-May-23 17:30 7 Hours
Daily		 102s6452 - GOI, 102s 6452 (102s Langdon) 102s6452 CT Low Gas S & C Ph  
ATCO 23-May-23 12:00 25-May-23 16:00 2.17 Days
Continuous		 876S 9L15 Protection Relay, 9L15, 876S 906, 876S 904, 876S 240kV Breaker Relays, 9L15 (834s Wesley Creek - 876s Brintnell), 876s 904 (876s Brintnell), 876s 906 (876s Brintnell) 21B/ 9L15 RTXP Test Switch Replacement, PRC-005 Relay Testing 21A&B / 9L15 an 50BF/ Bkr 904&906, PRC-005 Trip Coil Testing Breaker 904 & 906  
ALTALINK 23-May-23 13:30 24-May-23 16:30 27 Hours
Continuous		 650s T3 TX18818 (SVC) - GOI, 650s T3 (650s Hansman Lake) investigate IDD bushing monitors, and Qualitrol alarm  
ALTALINK 24-May-23 10:30 25-May-23 17:30 31 Hours
Continuous		 504s853E (853L) - GOI, 504s 853E (504s Queenstown) 1st Trip PRC5 Breaker Maintenance  
ENMAX, ALTALINK 26-May-23 08:00 26-May-23 16:00 8 Hours
Continuous		 21.80L (42s Sarcee - SS-21) HV breaker SF6 Gas Sample - 21B138-21.80  
CNRL 27-May-23 07:30 05-Jun-23 18:00 9.44 Days
Continuous		 75-PLH-903 (838s Horizon Mining - 842s Horizon Upgrading), 842s 75-TR-4701 (842s Horizon Upgrading), 842s 75-TR-7701 (842s Horizon Upgrading) 260kV 5YR PMs and Protective Relay Upgrades  
CNRL 28-May-23 07:30 04-Jun-23 18:00 7.44 Days
Continuous		 838s 75-TR-2701 (838s Horizon Mining) Protective Relay Testing  
EPCOR 29-May-23 07:00 29-May-23 17:00 10 Hours
Continuous		 TX1 Zone @ Lambton E803S, EP 803s T1 (EP 803s Lambton) Lambton: Pole Lighting Upgrade Project (Pole #1)  
EPCOR 29-May-23 07:00 30-May-23 17:00 1.42 Days
Continuous		 P2403 @ Petrolia E816S, 816s P2403 (816s Petrolia) Petrolia: P2403 CT Doble  
BCH 29-May-23 09:00 09-Jun-23 17:00 11.33 Days
Continuous		 T3 (BCH Natal) Tap changer inspections and doble testing AB-BC
ATCO 29-May-23 10:00 08-Jun-23 10:00 10 Days
Continuous		 813S 706, 813S 712, 813S SVC, 813s SVC (813s Little Smoky) Protection cutover for 5&7 harmonic relays for SVC

Wiring in 703T CT circuit		  
ALTALINK 29-May-23 10:30 01-Jun-23 16:30 3.25 Days
Continuous		 42s T1 (Tx 18508) - GOI, 42s T1 (42s Sarcee) PRC5 Doble and oil leaks  
ATCO 29-May-23 12:00 01-Jun-23 16:00 3.17 Days
Continuous		 876S 9L56 Protection Relay, 9L56, 876S 904, 876S 902, 876S 240kV Breaker Relays, 9L56 (720s Wabasca - 876s Brintnell), 876s 902 (876s Brintnell), 876s 904 (876s Brintnell) 21A&B/ 9L56, 50BF/902 RTXP Test Switch Replacement, PRC-005 Relay Testing 21A&B / 9L56 an 50BF/ Bkr 902, PRC-005 Trip Coil Testing Breaker 902  
EPCOR 30-May-23 07:00 31-May-23 17:00 1.42 Days
Continuous		 TX2 Zone @ Lambton E803S, EP 803s T2 (EP 803s Lambton) Lambton: First Day- Pole Lighting Upgrade Project (Pole #7) and Second Day -TX2 Leak Investigation (WO: 043694)  
SUNCOR 30-May-23 08:00 03-Jun-23 20:00 4.5 Days
Continuous		 29EDD1S12), 29PL9-3 (29EDD-1 Millennium - 29EDD-3), 29EDD-1 29EDD1s552 (29EDD-1 Millennium), 29EDD-1 29EDD1s652 (29EDD-1 Millennium), 29EDD-1 29EDD1SPL9-3 (29EDD-1 Millennium) Millennium 260kV bus jumper replacement related to existing 29PL9-3 &  
ALTALINK 30-May-23 08:30 01-Jun-23 13:30 2.21 Days
Continuous		 170s T2 TX18889 - GOI, 170s T2 (170s Pike) PRC5 maintenance, tap changer major maintenance, test transformer  
EPCOR 31-May-23 07:00 02-Jun-23 17:00 2.42 Days
Continuous		 1164L @ Petrolia E816S and Riverview, 1164L (816s Petrolia - EP Riverview) Petrolia: 1164L CT/Arrestor Doble and PDS12 Disconnect Maintenance  
ALTALINK 31-May-23 08:00 31-May-23 17:00 9 Hours
Daily		 949L(275s-306s) GOI, 949L (275s Jenner - 306s Halsbury) Disconnect fibre connection inside Jenner control building, pull fibre back to pole structure, install expansion joints in PVC. Re-pull and re-connect fibre, perform OTDR test.  
EPCOR 01-Jun-23 07:00 02-Jun-23 17:00 1.42 Days
Continuous		 TX2 Expanded Zone (240BA3 Open Ended) @ Bellamy E814S and Argyll Transfer Station E629S, 814s T2 (814s Bellamy), 240BA3 (629s Argyll Transfer Station - 814s Bellamy) Bellamy: TX2 Zone P&C Maintenance and Op Checks  
ALTALINK 02-Jun-23 21:00 04-Jun-23 20:00 1.96 Days
Continuous		 38s T1, 138kV Bus 1, & 293s - GOI, 38s T1 (38s East Edmonton), 38s C1 (38s East Edmonton), 38s C2 (38s East Edmonton), 737L (38s East Edmonton - 95s Imperial Oil Edmonton), 736L (38s East Edmonton - 293s Bernese), 865L (38s East Edmonton - 216s Knightsbridge) Replace 38s736CT’s, replace insulators on 7 switches and 15 post insulators and perform transformer maintenance on 293sT1 and 293sT2.  
EPCOR 05-Jun-23 07:00 16-Jun-23 17:00 11.42 Days
Continuous		 TX1 Zone @ Bellamy E814S, 814s T1 (814s Bellamy) Bellamy: Apparatus First Week- TX1 Doble and Arrestor/PT Doble, P&C Second Week- TX1 Zone P&C Maintenance  
EPCOR 05-Jun-23 07:00 16-Jun-23 17:00 11.42 Days
Continuous		 TX3 @ Lambton E803S, EP 803s T3 (EP 803s Lambton) Lambton: TX3 DGA Installation and Neutral Bushing Replacement  
ALTALINK 05-Jun-23 07:30 07-Jun-23 12:30 2.21 Days
Continuous		 510s ACF 12 – GOI, 510s ACF12 (510s Sunnybrook) Filter bank inspection, Breaker Dashpot Inspection, 6MD66 relay maintenance  
ALTALINK 05-Jun-23 08:00 08-Jun-23 16:00 3.33 Days
Continuous		 511s AC Filter Bank 1 and T30 - GOI, AML 511s FB Bus 1 (AML 511s Crossings), AML 511s T30 (AML 511s Crossings) Annual ACF 11, 12, 13 Inspections, Bird Mitigation on Reactors in Filter. SVC Plus will also be out of service.  
ENMAX 05-Jun-23 08:00 16-Jun-23 18:00 11.42 Days
Continuous		 162.1TR (SS-162)., 162.1TR (SS-162) Power factor test transformer. Transformer Maintenance. Power Factor Test - 162PT138-T1. Transformer Monitor Maintenance. Tap changer maintenance. 162.1TR-oil monitor leaks in cabinet  
SUNCOR 05-Jun-23 08:00 30-Jun-23 18:00 25.42 Days
Continuous		 29PT-239 29PT-234, 29EDD-71 29PT-234 (29EDD-71) 29EDD71;144KV NODE,29PT-239 MAINT;PM 5y
29EDD71;29PT-234 & 30PD-16 MAINT;PM 5y		  
EPCOR, ALTALINK 05-Jun-23 09:30 16-Jun-23 17:00 11.31 Days
Continuous		 908LW (East ind TX2) East Industrial E52S and East Edmonton 38S and Ellerslie 89S, 908L (38s East Edmonton - 908AL tap), 908L (89s Ellerslie - 908AL tap), 908AL (52S East Industrial - 908L tap), 89s 852 (89s Ellerslie), 89s 752 (89s Ellerslie), 52s T2 (52s East Industrial), 38s 7652 (38s East Edmonton), 38s 7552 (38s East Edmonton) East Industrial: P&C Telecom Upgrade w/AltaLink  
ATCO 05-Jun-23 12:00 07-Jun-23 16:00 2.17 Days
Continuous		 951S 919, 951s 919 (951s Thickwood Hills) SVS outage Semi annual Inspection  
ATCO 05-Jun-23 12:00 08-Jun-23 16:00 3.17 Days
Continuous		 876S 240kV Breaker Relays, 876S 9L10 Protection Relay, 9L10, 876S 901, 876S 903, 9L10 (876s Brintnell - 939s Livock), 876s 901 (876s Brintnell), 876s 903 (876s Brintnell) 21A&B/ 9L10, 50BF/901&903 RTXP Test Switch Replacement, PRC-005 Relay Testing 21A&B / 9L10 an 50BF/ Bkr 901&903, PRC-005 Trip Coil Testing Breaker 901 & 903  
ALTALINK 05-Jun-23 13:00 05-Jun-23 15:30 2.5 Hours
Daily		 632s413 (413L & I_239s) - GOI, 413L (239s Castle River - 632s Russell) 1st Trip followed by maintenance  
CNRL 06-Jun-23 07:30 09-Jun-23 18:00 3.44 Days
Continuous		 838s 75-TR-2801 (838s Horizon Mining) Protective Relay Testing  
ALTALINK 06-Jun-23 08:00 08-Jun-23 13:00 2.21 Days
Continuous		 39sT1 (Tx18107) – GOI, 39s T1 (39s Bickerdike) Transformer maintenance, fix temp gauge, oil leak, 29GT relocate.  
ALTALINK 06-Jun-23 10:00 06-Jun-23 12:00 2 Hours
Daily		 632s412 (412L) - GOI, 412L (396s Pincher Creek - 632s Russell) 1st Trip followed by maintenance AB-BC
ALTALINK 07-Jun-23 09:30 07-Jun-23 17:30 8 Hours
Daily		 42s70 - GOI, 42s 70 (42s Sarcee) PRC5 1st Trip Breaker Maintenance and Cab Thermostat repair  
ALTALINK 07-Jun-23 12:30 09-Jun-23 16:30 2.17 Days
Continuous		 510s ACF 11 – GOI, 510s ACF11 (510s Sunnybrook) Filter bank inspection, Breaker Dashpot Inspection, 6MD66 relay maintenance  
SUNCOR 10-Jun-23 08:00 30-Jun-23 18:00 20.42 Days
Continuous		 29-752-4621 29-752-4622 29-752-4623 29-752-4624, 29EDD-71 752-4621 (29EDD-71), 29EDD-71 752-4622 (29EDD-71), 29EDD-71 752-4623 (29EDD-71), 29EDD-71 752-4624 (29EDD-71)
29EDD71;29-752-4621 MAINT & TEST;PM 10y
29EDD71;29-752-4622 MAINT & TEST;PM 10y
29EDD71;29-752-4623 MAINT & TEST;PM 10y
29EDD71;29-752-4624 MAINT & TEST;PM 10y		  
EPCOR 12-Jun-23 07:00 17-Jun-23 17:00 5.42 Days
Continuous		 J2408 (J240C1) @ Jasper Terminal E805S, EP 805s J2408 (EP 805s Jasper) Jasper: J2408 Breaker Maintenance and CT/CVT/PT/Arrestor Doble and JDS13GS Disconnect Maintenance  
ALTALINK 12-Jun-23 08:00 15-Jun-23 16:00 3.33 Days
Continuous		 511s ACF Bank # 2 GOI, AML 511s FB Bus 2 (AML 511s Crossings) Annual ACF 21, 22 Inspections, Bird Mitigation on Reactors in Filter  
ATCO 12-Jun-23 09:30 30-Jun-23 17:30 18.33 Days
Continuous		 2075s ACF14 (2075s Newell), 2075s ACF11 (2075s Newell), 2075s ACF12 (2075s Newell), 2075s ACF13 (2075s Newell) PRC-005 testing, filter bank inspections, & HMI Upgrades  
ATCO 12-Jun-23 10:00 16-Jun-23 14:00 4.17 Days
Continuous		 856S 701, 856S 901T, 856s 701 (856s Kinosis), 856s 901T (856s Kinosis) 902T Maintenance, 701 Maintenance  
ALTALINK 12-Jun-23 10:30 12-Jun-23 17:30 7 Hours
Daily		 370s852 - GOI, 370s 852 (370s North Lethbridge) 1st Trip PRC5 Breaker Maintenance  
ALTALINK 12-Jun-23 11:00 15-Jun-23 17:30 3.27 Days
Continuous		 63s952 GOI, 63s 952 (63s Red Deer) 240kV breaker maintenace  
ATCO 12-Jun-23 13:00 15-Jun-23 16:00 3.13 Days
Continuous		 7L224, 7L224 (650s Hansman Lake - 774s Monitor) Cross arm and insulator replacement on 7L224  
ALTALINK 12-Jun-23 13:00 15-Jun-23 17:00 3.17 Days
Continuous		 89s952 - GOI, 89s 952 (89s Ellerslie) 1st trip & PRC5 full maintenance  
ALTALINK, BHE Canada 13-Jun-23 09:30 13-Jun-23 17:30 8 Hours
Daily		 120s152 - GOI, 120s 152 (120s Picture Butte) 1st Trip PRC5 Breaker Maintenance  
ALTALINK, BHE Canada 14-Jun-23 09:30 14-Jun-23 17:30 8 Hours
Daily		 120s252 - GOI, 120s 252 (120s Picture Butte) 1st Trip PRC5 Breaker Maintenance  
EPCOR 15-Jun-23 07:00 16-Jun-23 17:00 1.42 Days
Continuous		 TX1 Expanded Zone (240BA2 Open Ended) @ Bellamy E814S and Argyll Transfer Station E629S, 814s T1 (814s Bellamy), 240BA2 (629s Argyll Transfer Station - 814s Bellamy) Bellamy: TX1 Zone P&C Maintenance and Op Checks  
EPCOR 15-Jun-23 07:00 16-Jun-23 17:00 1.42 Days
Continuous		 TX3 Zone @ Lambton E803S, EP 803s T3 (EP 803s Lambton) Lambton: Pole Lighting Upgrade Project (Pole #4, 5, 6)  
ALTALINK, ATCO 15-Jun-23 11:30 15-Jun-23 14:30 3 Hours
Daily		 395s77E (7L77) – GOI, 7L77 (395s North Holden - 709s Vegreville), 395s 77E (395s North Holden) Commission new T1 tripping module trips to 395s77E (252). Commissioning of new SCADA alarms, controls, and metering.L2 A21/L2, B21/L2, & 11(96/25SC/79)/252 protections will be out of service at 395s.  
ENMAX 19-Jun-23 08:00 30-Jun-23 18:00 11.42 Days
Continuous		 162.2TR (SS-162)., 162.2TR (SS-162) Power factor test transformer. Transformer Maintenance. Power Factor Test - 162PT138-T2. Transformer Monitor Maintenance. Tap changer maintenance. 162.2TR Hot Spot (Low Side Riser)  
ATCO 19-Jun-23 09:30 23-Jun-23 17:30 4.33 Days
Continuous		 2029S ACF11, 2029S ACF12, 2029S ACF13, 2029S ACF14, 2029s ACF11 (2029s Heathfield), 2029s ACF12 (2029s Heathfield), 2029s ACF13 (2029s Heathfield), 2029s ACF14 (2029s Heathfield) PRC-005 testing, filter bank inspections  
EPCOR, ALTALINK 19-Jun-23 09:30 30-Jun-23 17:00 11.31 Days
Continuous		 1059L (TX1 East Ind) @ Lambton E803S and East Industrial E52S, 1059L (38s East Edmonton - 1059AL tap), 38s 7552 (38s East Edmonton), 38s 7452 (38s East Edmonton), 1059AL (52s East Industrial - 1059L tap), 1059L (EP 803s Lambton - 1059AL tap), EP 803s L2401 (EP 803s Lambton), EP 803s L2404 (EP 803s Lambton) East Ind: P&C- Telecom Upgrade w/ AltaLink.
Lambton: 1059L CT/Arrestor Doble and LDS1/LDS8 Disconnect Maintenance, and East Industrial: E2401 Breaker Maintenance and CVT Doble		  
ALTALINK 19-Jun-23 12:00 22-Jun-23 18:00 3.25 Days
Continuous		 86sT1 (Tx18491) – GOI, 86s T1 (86s Bigstone) Major tap changer maintenance, monitor alarm investigate, test, install bushing monitors  
ATCO 21-Jun-23 09:30 14-Aug-23 16:00 54.27 Days
Continuous		 848S 29PL9-2 Protection Relay, 848S 901, 848S 902, 848s 901 (848s Ruth Lake), 848s 902 (848s Ruth Lake) Suncor Capacity Increase project.
Suncor is reconductoring 29PL9-2, ATCO is completing a line protection upgrade in coordination with the outage		  
EPCOR 26-Jun-23 07:00 28-Jun-23 17:00 2.42 Days
Continuous		 P2402 @ Petrolia E816S, 816s P2402 (816s Petrolia) Petrolia: P2402 CT Doble  
EPCOR 26-Jun-23 07:00 28-Jun-23 17:00 2.42 Days
Continuous		 SU2404 @ Summerside E657S, 657s SU2404 (657s Summerside) Summerside: SU2404 Breaker Maintenance and CT Doble  
ALTALINK 26-Jun-23 09:00 30-Jun-23 16:00 4.29 Days
Continuous		 820L (254s - I_315s - Future I_967s - 67, 820AL (315s Chin Chute - 820L tap), 820L (254s Coaldale - 820AL tap), 820L (67s Stirling - 820AL tap) Install and commissioning new D60 and SEL311 settings update, SCADA updates, new telecom equipment installed and commissioned and new RAS relays at 254s installed and commissioned.  
ATCO 26-Jun-23 09:30 30-Jun-23 17:30 4.33 Days
Continuous		 2029S ACF21, 2029S ACF22, 2029S ACF23, 2029s ACF21 (2029s Heathfield), 2029s ACF22 (2029s Heathfield), 2029s ACF23 (2029s Heathfield) PRC-005 testing, filter bank inspections  
ALTALINK 26-Jun-23 13:00 28-Jun-23 16:00 2.13 Days
Continuous		 103s T1(Tx 18776) GOI, 103s T1 (103s Goose Lake) Doble, maintenance, connector, steam clean. Requested By: MAPS South  
EPCOR 04-Jul-23 07:00 06-Jul-23 17:00 2.42 Days
Continuous		 SU2403 @ Summerside E657S, 657s SU2403 (657s Summerside) Summerside: Summerside SU2403 Breaker Maintenance and CT Doble  
EPCOR, ALTALINK 04-Jul-23 07:00 08-Jul-23 17:00 4.42 Days
Continuous		 Genesee S/S 430L Bay Isolation, 430L (330P Genesee - 510S Sunnybrook) 1.138kv 430L1 & L2 foundation installation
2. 138kv 12TC2L2 foundation installation		  
EPCOR, ALTALINK 04-Jul-23 07:00 14-Aug-23 17:00 41.42 Days
Continuous		 Cloverbar S/S 921L, Tx2 and Tx4 bays, 921L (71s Lamoureux - 987s Clover Bar), 987s C2404 (987s Clover Bar), 987s CDS35 (987s Cloverbar), 987s T4 (987s Clover Bar) Initial stage of 240 kV ring re-configuration for new 1191L construction. New disconnects CDS41 and CDS44 to be energized post outage.  
ALTALINK 04-Jul-23 09:00 06-Jul-23 18:00 2.38 Days
Continuous		 603L (138s - I_243s) - GOI, 603L (138s Windy Flats - 243s Soderglen) Maint. 603L between Structures #1 - 109  
ATCO 04-Jul-23 10:00 05-Jul-23 16:00 30 Hours
Continuous		 732S 906, 732s 906 (732s Mitsue) breaker maintenance  
ALTALINK 05-Jul-23 23:00 06-Jul-23 03:00 4 Hours
Daily		 62s 11 (62s Brazeau Plant) maintenance  
ALTALINK 06-Jul-23 03:00 06-Jul-23 07:00 4 Hours
Daily		 62s 12 (62s Brazeau Plant) maintenance  
ALTALINK 10-Jul-23 07:00 11-Jul-23 19:30 1.52 Days
Continuous		 1148L (251s - I - 1018s) De-energized, 1148L (251s Whitla - 1018s Shamrock) Customer requested outage  
EPCOR 10-Jul-23 07:00 14-Jul-23 17:00 4.42 Days
Continuous		 P2404 @ Petrolia E816S, 816s P2404 (816s Petrolia) Petrolia: P2404 Bay CT LCR  
EPCOR 10-Jul-23 07:00 16-Jul-23 17:00 6.42 Days
Continuous		 1058L @ Lambton E803S and Summerside E657S, 1058L (657s Summerside - EP 803s Lambton) Lambton: 1058L CVT/CT/Arrestor Doble and L2403 Breaker Maintenance and CT Doble and Pole Lighting Upgrade Project (Pole #3 on July 15)  
ALTALINK 10-Jul-23 08:00 14-Jul-23 18:00 4.42 Days
Continuous		 170L (632s - 799s) - GOI, 170L (632s Russell - 799s Coleman) 170L Insulator replacement between Structures #13 - 47 AB-BC
ALTALINK 11-Jul-23 08:00 19-Jul-23 17:00 8.38 Days
Continuous		 349s Station GOI, 349s Stavely, 349s T1 (349s Stavely) Upgrade bypass bus to 1590, replace strain insulators and pin cap insulators. Replace 25kv air breaks – s15, s12, s11. Replace 349s10 and 349s14 surge arrestors. Replace cracked wooden cross arm (349s8, 349s5, 349s23 and 25kv bus support beam) & Replace 349s10  
ALTALINK 11-Jul-23 12:00 11-Jul-23 16:30 4.5 Hours
Daily		 225s225E (225L) - GOI, 225s 225E (225s Magrath) Installing new RAS 128 Relays and performing trip tests from all RAS 128 Relays.  
ALTALINK 12-Jul-23 10:00 12-Jul-23 14:00 4 Hours
Daily		 250p 11 (250p Bighorn Plant) maintenance  
ALTALINK 13-Jul-23 10:00 13-Jul-23 14:00 4 Hours
Daily		 250p 22 (250p Bighorn Plant) maintenance  
EPCOR 17-Jul-23 07:00 19-Jul-23 17:00 2.42 Days
Continuous		 SU2402 @ Summerside E657S, 657s SU2402 (657s Summerside) Summerside: SU2402 Breaker Maintenance and CT Doble  
EPCOR 17-Jul-23 07:00 28-Jul-23 17:00 11.42 Days
Continuous		 TX2 @ Cloverbar E987S, 987s T2 (987s Clover Bar) Cloverbar: TX2 DGA Install  
ALTALINK 17-Jul-23 08:00 21-Jul-23 18:00 4.42 Days
Continuous		 170L (632s - 799s) - GOI, 170L (632s Russell - 799s Coleman) 170L Insulator replacement between Structures #13 - 47 AB-BC
ATCO 17-Jul-23 13:00 19-Jul-23 16:00 2.13 Days
Continuous		 825S 906, 825s 906 (825s Whitefish Lake) 906 Maintenance and PRC 005 Testing  
EPCOR 24-Jul-23 07:00 26-Jul-23 17:00 2.42 Days
Continuous		 SU2401 @ Summerside E657S, 657s SU2401 (657s Summerside) Summerside: SU2401 Breaker Maintenance and CT Doble  
ALTALINK 24-Jul-23 08:00 27-Jul-23 18:00 3.42 Days
Continuous		 170L (632s - 799s) - GOI, 170L (632s Russell - 799s Coleman) 170L Insulator replacement between Structures #13 - 47 AB-BC
ALTALINK 24-Jul-23 10:00 03-Aug-23 18:00 10.33 Days
Continuous		 64s 240kV Bus (901L & T2) - GOI, 64s 240kV Bus (64s East Crossfield) Replace 64s29, 64s28 and CVT1 (64s32)  
ATCO 24-Jul-23 10:00 14-Aug-23 17:00 21.29 Days
Continuous		 7L587, 7L587 (822s Wolf Lake - 826s Marguerite Lake) 822S Wolf lake P&C and SCADA Upgrade
Work on Breaker 822S 701
Cut over cabling and protection to new panel
Commission new protection including teleprotection DTT to 826S		  
ALTALINK 24-Jul-23 12:30 27-Jul-23 17:30 3.21 Days
Daily		 63s852 - GOI, 63s 852 (63s Red Deer) 1st trip PRC 5 maintenance  
ATCO 25-Jul-23 10:00 21-Aug-23 17:00 27.29 Days
Continuous		 7L16, 766S 144KV Bus, 7L16 (766s Nevis - 948s Heatburg), 766s 901T (766s Nevis), 766s 701T (766s Nevis) 766S Nevis Rebuild Project -
P&C wiring and commissioning 7L16 and 701T protection upgrade, refurbish 701T tapchanger
Replace 500D1/D2, and Bkr 502		  
EPCOR 27-Jul-23 07:00 27-Jul-23 17:00 10 Hours
Continuous		 TX2 Zone @ Poundmaker, T2 (Poundmaker) Poundmaker: TX2 Zone CVT Doble  
EPCOR, ALTALINK 31-Jul-23 09:30 04-Aug-23 17:00 4.31 Days
Continuous		 930L @ Poundmaker and North Calder 37S, 930L (37s North Calder - Poundmaker) 930L: Aerial- Broken Insulator Replacement and Marker Cones Upgrade  
ALTALINK 08-Aug-23 10:00 10-Aug-23 18:00 2.33 Days
Continuous		 64s 25kV Bus 1 (T1 & VR1) - GOI, 64s T1 (64s East Crossfield) Replace 25kV PT1 (64s24) & adjust switch 64s589  
SUNCOR 11-Aug-23 06:00 26-Aug-23 18:00 15.5 Days
Continuous		 30EDD-2 46711252 30EDD2;30PK-10 SYSTEM;PM 5y
 
ALTALINK 14-Aug-23 07:30 17-Aug-23 16:30 3.38 Days
Continuous		 510s ACF 14 – GOI, 510s ACF14 (510s Sunnybrook) Doble TX18882 Reactor, Breaker Dashpot Inspection and 6MD66 relay maintenance  
ALTALINK 14-Aug-23 09:00 17-Aug-23 18:00 3.38 Days
Continuous		 64s 138kV Bus 1 (T1 & T2) - GOI, 64s 138kV Bus1 (64s East Crossfield) Replace 138kV CVT2 (64s27)  
ATCO 14-Aug-23 09:00 21-Aug-23 16:00 7.29 Days
Continuous		 7L03, 7L03 (731s Elmworth - 7L09 tap) Replacing red tag poles  
ALTALINK 15-Aug-23 07:00 17-Aug-23 15:00 2.33 Days
Continuous		 202L (61s- 62s) - GOI, 202L (61s Lodgepole - 62s Brazeau Plant Plant) 202L str. 108-117 Comp. Replacement  
EPCOR 17-Aug-23 07:00 22-Sep-23 17:00 36.42 Days
Continuous		 Cloverbar S/S 240 kV ring open from CDS31 to CDS39, 987s CDS34 (987s Cloverbar) Continued re-configuration of 240 kV ring for new 1191L bay construction will leave the ring open from newly energized CDS41 and CDS44 disconnects.  
EPCOR, ALTALINK 21-Aug-23 09:30 01-Sep-23 17:00 11.31 Days
Continuous		 920LW Zone @ Castledowns E557S and North Calder 37S, 920L (37s North Calder - 557s Castle Downs) Castledowns: CD2403/CD2401 Breaker Maintenance and 920LW CVT/Arrestor/CT Doble and CDDS2/CDDS3/CDDS12 Disconnect Maintenance  
ATCO 21-Aug-23 10:00 28-Aug-23 17:00 7.29 Days
Continuous		 9L16, 9L16 (755s Cordel - 972s Tinchebray) Upgrade 21A/B-9L16 protection relay wiring/programming and commission LTO/DTT  
ATCO 21-Aug-23 10:00 11-Sep-23 17:00 21.29 Days
Continuous		 7L574, 7L574 (822s Wolf Lake - 7L574 tap) 822S Wolf lake P&C and SCADA Upgrade
Work on Breaker 822S 702
Cut over cabling and protection to new panel
Line crew prep 7L86/7L574 bypass and connect to 7L574
Commission new protection including teleprotection DTT from 970S Bourque to 822S, install temp relay settings for 7L574/7L86 bypass		  
BCH 22-Aug-23 09:00 02-Sep-23 17:00 11.33 Days
Continuous		 5L92 (BCH Cranbrook - BCH Selkirk) breaker repair AB-BC
ATCO, IMPERIALOIL 23-Aug-23 08:00 30-Sep-23 18:00 38.42 Days
Continuous		 7L105 (837s Mahihkan - 909s Mahno), 7L161 (909s Mahno - 942s Nabiye), 909s 52A3 (909s MAHNO), 909s TNS-A1 (909s Mahno), 909s TNS-A2 (909s Mahno) maintenance  
ATCO 23-Aug-23 09:30 24-Sep-23 16:00 32.27 Days
Continuous		 848S 29PL9-1 Protection Relay, 848S 29PL9-1 SUNCOR ISLANDING RAS (IRAS), 848S 903, 848S 906, 848s 903 (848s Ruth Lake), 848s 906 (848s Ruth Lake) Suncor Capacity Increase project.
Suncor is reconductoring 29PL9-1, ATCO is completing a line protection upgrade in coordination with the outage		  
ALTALINK 23-Aug-23 23:00 24-Aug-23 03:00 4 Hours
Daily		 62s 11 (62s Brazeau Plant) maintenance  
ALTALINK 24-Aug-23 03:00 24-Aug-23 07:00 4 Hours
Daily		 62s 12 (62s Brazeau Plant) maintenance  
EPCOR, ALTALINK 27-Aug-23 07:00 10-Sep-23 17:00 14.42 Days
Continuous		 Genesee S/S 430L Bay Isolation, 430L (330P Genesee - 510S Sunnybrook) 1.String BB2L , BB2L1 to BB2L2 & 12TC2L , 12TC2L1 to 12TC2L3
2. String BB2L , BB2L1 to BB2L2 & 12TC2L , 12TC2L1 to 12TC2L3		  
ATCO, IMPERIALOIL 28-Aug-23 09:00 28-Aug-23 13:00 4 Hours
Continuous		 837S 702, 837S 7L105 Protection Relay, 7L105, 837s 702 (837s Mahihkan), 7L105 (837s Mahihkan - 909s Mahno) RTXP switch replacements for 7L105  
ALTALINK 28-Aug-23 12:30 31-Aug-23 17:30 3.21 Days
Continuous		 310p952 - GOI, 310p 952 (310p Sundance) Maintenance on 310p952 including 1st trips  
SUNCOR 01-Sep-23 08:00 01-Sep-23 17:00 9 Hours
Continuous		 635PT-1001, 635EDD-1000 635PT-1001 (635EDD-1000) Planned Repair on Transformer 2ndary Side Breaker Mech Heaters  
EPCOR 05-Sep-23 07:00 28-Sep-23 17:00 23.42 Days
Continuous		 240BA3 @ Argyll Transfer Station E629S and Bellamy E814S, 240BA3 (629s Argyll Transfer Station - 814s Bellamy) 240BA3: UGT Degassing Project  
ALTALINK 06-Sep-23 07:00 06-Sep-23 18:00 11 Hours
Daily		 745L (602s-745L482) - GOI, 745L (602s Cold Creek - 745AL tap) Replace insulators on structure 574. Replace bayonet bolts & hardware tighten structures 628 & 630.  
ALTALINK 06-Sep-23 08:00 14-Sep-23 15:00 8.29 Days
Continuous		 253s Station GOI, 753L (65s High River - 253s Blackie), 851L (253s Blackie - 525s Carseland), 876L (179s Gleichen - 253s Blackie), 253s 753W (253s Blackie), 253s 851W (253s Blackie), 253s 876 (253s Blackie), 253s C1 (253s Blackie) Replace multiple 138kV switches, 253s1, 253s2, 253s5, 253s6,253s9, 253s179 and 253s181. Replacement of wooden support beams to steel for switches. Replace 138kV strain insulators (10 sets throughout station)  
EPCOR 11-Sep-23 07:00 11-Sep-23 17:00 10 Hours
Continuous		 VDS20 @ Victoria E511S, EP 511s VDS20 (EP 511s Victoria) Victoria: VDS20 Disconnect Repair  
ALTALINK 11-Sep-23 07:00 21-Sep-23 17:00 10.42 Days
Continuous		 1325L WATL (510s-511s) - GOI, 1325L (510s Sunnybrook - AML 511s Crossings) Annual Link Outage, Station Misc work, Valve Hall Inspections, DC Bushing Doble, VCS Load bank testing.  
ALTALINK 12-Sep-23 07:30 13-Sep-23 08:00 24.5 Hours
Continuous		 163s T2(Tx18482) Advice for Customer, 163s T2 (163s Amoco Empress) to replace bolted connections to crimp connections on the cables feeding T2.  
ALTALINK 13-Sep-23 08:05 13-Sep-23 16:30 8.42 Hours
Continuous		 163s T1(Tx18483) Advice for Customer, 163s T1 (163s Amoco Empress) to replace bolted connections to crimp connections on the cables feeding T1.  
ATCO 18-Sep-23 10:00 18-Sep-23 17:00 7 Hours
Continuous		 9L20, 9L912, 9L20 (755s Cordel - 766s Nevis), 9L912 (63s Red Deer - 766s Nevis) 766S Nevis Rebuild Project - Hot Line crew connect 9L20/9L912 bypass, cut in open Jumper J1 and J2  
ATCO 18-Sep-23 10:00 09-Oct-23 17:00 21.29 Days
Continuous		 822S 703, 822s 703 (822s Wolf Lake) 822S Wolf lake P&C and SCADA Upgrade
Work on Breaker 822S 703
Cut over cabling and protection to new panel.
Commission new protection including teleprotection DTT.
7L86/7L574 bypass will be in service		  
ALTALINK 18-Sep-23 12:00 21-Sep-23 18:00 3.25 Days
Continuous		 320P T1 (Tx18247) – GOI, 320p T1 (320p Keephills) Transformer maintenance. fix leaks, fan, & burned wires. Test transformer. 767L to be switched in to facilitate this outage.  
EPCOR 19-Sep-23 07:00 29-Sep-23 17:00 10.42 Days
Continuous		 Genesee S/S 12TC2 Bay Outage, 330P 12TC2 (330p Genesee) Screw piles installation on west end of existing 500kv bus 2  
ATCO 19-Sep-23 10:00 24-Sep-23 17:00 5.29 Days
Continuous		 9L93, 9L93 (615s Halkirk - 972s Tinchebray) Connect new 9LA93 T-tap. Cut in, reroute, restring, and splice OPGW from Str#60 to 615S Halkirk. Complete cutover and commission Protection/SCADA/Telecom at new 973S Lanes Lake, 972S, 615S Halkirk  
ATCO 19-Sep-23 10:00 04-Dec-23 17:00 76.33 Days
Continuous		 766S 144KV Bus, 766S 240KV Bus, 766s 701 (766s Nevis), 766s 901T (766s Nevis) 766S Nevis Rebuild Project - Replace and commission 9L912D1, 9L20D2, 901, 902, 901CT, 902CT, 901A, 902A, 900PT1, connect new 903A and 704A  
EPCOR 25-Sep-23 07:00 06-Oct-23 17:00 11.42 Days
Continuous		 Cloverbar S/S Tx4 bay and 1191L bay, 987s CDS35 (987s Cloverbar) Continued re-configuration 240 kV ring for new 1191L bay  
ATCO, ALTALINK 25-Sep-23 11:00 06-Nov-23 13:00 42.13 Days
Continuous		 9L55, 885S 902T, 885S 704, 885S 500PT2, 885S 500SST2X, 885S 501, 885S 700PT2, 9L55 (AML 852s Round Hill - 885s McMillan), 885s 902T (885s McMillan) 885S McMillan sub Protection Upgrade: Complete protection cut over and Commissioning of new protection on 902T, 704/7L02 Line protection, 25kV Reactor protection. On Monday October 23, 2023 will extend GOI to new isolation points: 501A,502TD1,502TD1,703B,7L02D2,906B,902A,Switch @ Round Hill (Alta Link). The following will be OOS: 900BS2, 903,902,9L55,902T,704/7L02,144kV Bus. Complete cut over and Commissioning of new protection to 240kV bus, 903,902,9L55 line protection.  
BHE Canada 02-Oct-23 08:00 07-Oct-23 18:00 5.42 Days
Continuous		 MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
ALTALINK 02-Oct-23 09:00 07-Oct-23 18:00 5.38 Days
Continuous		 1201L/5L94 (520s - B2s) - GOI, 1201L (520s Bennett - BCH Cranbrook) maintenance tasks str range 31-485 (Oct 2 - 7) AB-BC
ALTALINK 02-Oct-23 10:00 07-Oct-23 16:00 5.25 Days
Continuous		 520s T1 (affect 1114L) - GOI, 520s T1 (520s Bennett) Bushing monitor replacement on all 3 phases + spare and DGA monitor (replacing PD monitor on T1-2 phase only).  
EPCOR 09-Oct-23 07:00 27-Oct-23 17:00 18.42 Days
Continuous		 Cloverbar S/S Tx2 bay and 1191L bay, 987s CDS32 (987s Cloverbar) Continued re-configuration 240 kV ring for new 1191L bay. 1191L to be energize post outage with new isolation point of CDS45 to remain until 1191L is ready to energize.  
ATCO 09-Oct-23 09:00 12-Oct-23 16:30 3.31 Days
Continuous		 7L50, 7L50 (757s Battle River - 491L tap) 7L50 Pole and arm replacement  
EPCOR, ALTALINK 10-Oct-23 07:00 14-Oct-23 17:00 4.42 Days
Continuous		 1059L @ Lambton and East Industrial E52S and East Edmonton 38S, 1059L (38s East Edmonton - 1059AL tap), EP 803s L2401 (EP 803s Lambton), EP 803s L2404 (EP 803s Lambton) Lambton: 1059L CVT LCR  
EPCOR 10-Oct-23 07:00 21-Oct-23 17:00 11.42 Days
Continuous		 240CV5 @ Castledowns E557S and Victoria E511S, CV5 (EP 511s Victoria - 557s Castle Downs) CV5: UGT CV5 Annual Manhole Inspections  
ALTALINK 11-Oct-23 10:00 11-Oct-23 14:00 4 Hours
Daily		 250p 11 (250p Bighorn Plant) maintenance  
ALTALINK 12-Oct-23 03:00 12-Oct-23 07:00 4 Hours
Daily		 62s 12 (62s Brazeau Plant) maintenance  
ALTALINK 12-Oct-23 10:00 12-Oct-23 14:00 4 Hours
Daily		 250p 22 (250p Bighorn Plant) maintenance  
ATCO 16-Oct-23 09:00 19-Oct-23 16:30 3.31 Days
Continuous		 7L50, 7L50 (757s Battle River - 491L tap) 7L50 Pole and arm replacement  
ATCO, ALTALINK 23-Oct-23 09:00 27-Oct-23 16:30 4.31 Days
Continuous		 7L50, 7L50 (526s Buffalo Creek - 491L tap) 7L50 Pole and arm replacement  
ALTALINK, ENMAX 23-Oct-23 09:15 26-Oct-23 16:45 3.31 Days
Continuous		 937L (5s - 102s) Advice, 937L (5s East Calgary - 102s Langdon) SCADA Upgrade  
ATCO 30-Oct-23 09:00 02-Nov-23 16:30 3.31 Days
Continuous		 7L50, 7L50 (757s Battle River - 491L tap) 7L50 Pole and arm replacement  
ALTALINK 30-Oct-23 09:30 02-Nov-23 16:45 3.3 Days
Continuous		 916L (5s - 42s) Advice, 916L (5s East Calgary - 42s Sarcee) SCADA Upgrade  
ALTALINK 30-Oct-23 10:00 09-Nov-23 18:00 10.38 Days
Continuous		 1034L (244s - 324s) - GOI, 1034L (244s Bowmanton - 324s Cassils) Comp. replacement (Str. 186-380)  
ATCO 30-Oct-23 11:00 11-Dec-23 14:00 42.17 Days
Continuous		 863S 902T, 863S 500MT1, 863S 500PT3, 863S 505, 863S 506, 863s 902T (863s Paintearth) 863S Paintearth Protection Upgrade
Demo wiring from 505, 506 breakers, and 500PT3, run new wiring, terminate to 505, 506, and 500PT3, demo old 5L470 & 5L469 line protection panel, install new 5L470 & 5L469 line protection panel, wire and commission breakers, 500PT3, and line protection.
Demo old wiring, and old Transformer protection panel, install and terminate new wiring, and new Transformer protection panel. Commission new wiring/Transformer protection, and new Transformer protection panel.

Once GOI is released 902TD will need to be commissioned.		  
ALTALINK, ENMAX 06-Nov-23 09:15 08-Nov-23 16:45 2.31 Days
Continuous		 936L (5s - 102s) Advice, 936L (5s East Calgary - 102s Langdon) SCADA Upgrade  
ATCO 06-Nov-23 15:00 20-Nov-23 13:00 13.92 Days
Continuous		 9L89, 885S 900 BUS 1, 885S 900PT1, 885S 900PT3, 885S 901, 885S 902, 9L89 (885s McMillan - 2011s Dawes), 885s 260kV Bus 900BS1 (885s McMillan) 885S McMillan sub Protection Upgrade: Complete protection cut over and Commissioning of new protection on 901,902,900PT1,9L89PT,9L89 Line Protection,900PT3.  
ALTALINK 13-Nov-23 09:30 17-Nov-23 12:30 4.13 Days
Continuous		 5s T1(TX18903) Advice, 5s T1 (5s East Calgary) SCADA Upgrade  
ALTALINK, ATCO 13-Nov-23 10:00 24-Nov-23 18:00 11.33 Days
Continuous		 1035L (244s - A2075s) - GOI, 1035L (244s Bowmanton - 2075s Newell) Comp. replacement (Str. 100 - 242)  
ALTALINK 20-Nov-23 09:30 24-Nov-23 12:30 4.13 Days
Continuous		 5s T2(TX18835) Advice, 5s T2 (5s East Calgary) SCADA Upgrade  
ALTALINK 22-Nov-23 10:00 22-Nov-23 14:00 4 Hours
Daily		 250p 11 (250p Bighorn Plant) maintenance  
ALTALINK 23-Nov-23 10:00 23-Nov-23 14:00 4 Hours
Daily		 250p 22 (250p Bighorn Plant) maintenance  
ALTALINK 27-Nov-23 10:00 01-Dec-23 18:00 4.33 Days
Continuous		 1034L (244s - 324s) - GOI, 1034L (244s Bowmanton - 324s Cassils) Comp. replacement (Str. 186-380)  
ALTALINK 29-Nov-23 23:00 30-Nov-23 03:00 4 Hours
Daily		 62s 11 (62s Brazeau Plant) maintenance  
ALTALINK 30-Nov-23 03:00 30-Nov-23 07:00 4 Hours
Daily		 62s 12 (62s Brazeau Plant) maintenance  
ALTALINK 04-Dec-23 08:00 08-Dec-23 17:00 4.38 Days
Continuous		 658L (562s - I_662s - 649s) - GOI, 658L (562s Cypress - 658AL tap), 658L (649s Chappice Lake - 658AL tap) Component replacement 658L (str. 103-332)  
ATCO 04-Dec-23 10:00 04-Dec-23 17:00 7 Hours
Continuous		 9L20, 9L912, 9L20 (755s Cordel - 766s Nevis), 9L912 (63s Red Deer - 766s Nevis) 766S Nevis Rebuild Project - Hot Line crew disconnect 9L20/9L912 bypass, close open Jumper J1 and J2, Energize 240kV bus including new 903T and 144kV bus  
ALTALINK, ATCO 04-Dec-23 10:00 08-Dec-23 18:00 4.33 Days
Continuous		 1035L (244s - A2075s) - GOI, 1035L (244s Bowmanton - 2075s Newell) Comp. replacement (Str. 100 - 242)  
ATCO 15-Jan-24 14:30 26-Feb-24 14:00 41.98 Days
Continuous		 863S 504, 863S 901T, 863S Station Service, 863S 500PT2X, 863S 500PT2Y, 863s 901T (863s Paintearth) 863S Paintearth Protection Upgrade  
ATCO 12-Feb-24 11:00 20-May-24 14:00 98.08 Days
Continuous		 813S 901, 813s 901 (813s Little Smoky) Take 901 OOS to open bus up and add a new 902PT, and 902 breaker bay for the new 9L201 line to MPC Gas. (February 12, 2024 - May 6, 2024)
Will need to extend 901 GOI to take 903PT, 904, and 9L05 OOS to cut over 904 trips to new protection. (May 6, 2024 - May 20, 2024)		  
ATCO 26-Feb-24 14:30 11-Mar-24 14:00 13.94 Days
Continuous		 863S 902, 9L948, 9L948 (650s Hansman Lake - 863s Paintearth) 863S Paintearth Protection Upgrade
Demo old wiring, and old Line protection panel, install and terminate new wiring, and new Line protection panel. Commission new wiring/Line protection, and new Line protection panel.

Once GOI is released 902A will need to be commissioned.		  
ATCO 11-Mar-24 14:30 25-Mar-24 14:00 13.98 Days
Continuous		 863S 901, 9L27, 9L27 (755s Cordel - 863s Paintearth) 863S Paintearth Protection Upgrade
Demo old wiring, and old Line protection panel, install and terminate new wiring, and new Line protection panel. Commission new wiring/Line protection, and new Line protection panel.

Once GOI is released 901A will need to be commissioned.		  
ATCO 26-Apr-24 10:00 29-Apr-24 17:00 3.29 Days
Continuous		 9L80, 9L80 (755s Cordel - 757s Battle River) Complete termination and commissioning of 9L80 LTO and 912T TO - A/B send to 755S Cordel  
ATCO 06-May-24 09:00 31-May-24 17:30 25.35 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 31-May-24 17:30 25.35 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 31-May-24 17:30 25.35 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		  
ATCO, ALTALINK 03-Jun-24 08:00 14-Jun-24 17:30 11.4 Days
Continuous		 12L44 (939s Livock - 951s Thickwood Hills), 12L41 (510s Sunnybrook - 939s Livock) 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, ALTALINK 03-Jun-24 08:00 14-Jun-24 17:30 11.4 Days
Continuous		 12L44 (939s Livock - 951s Thickwood Hills), 12L41 (510s Sunnybrook - 939s Livock), 939S 1213R, 939S 1214A, 939S 1216R 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, ALTALINK 03-Jun-24 08:00 14-Jun-24 17:30 11.4 Days
Continuous		 12L44 (939s Livock - 951s Thickwood Hills), 12L41 (510s Sunnybrook - 939s Livock), 951S 1201T, 951S 1213R 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 10:00 28-Jun-24 10:00 25 Days
Continuous		 9L16, 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		  
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, Demo 601PT,601B,601,601A,6L14D1,608A,608,608B,6LML1D1,600PT1, Replace breaker 401. Cut over to new protection: 602,607,607PT,601TD,901T,400PT1,400D1,901TD,903A,908A,913A. Install oil containment for 901T. Pull all new outdoor cable, modify cable tray, install new cable tray.  
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 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: 500D4,501,500D15,504,500PT2,500D10,504VR,605T,605TD,603PT,603,603CT,604,604CT,606,606CT,600PT2,605TD,902T,400PT2,402,902TD,900PT2. Install oil containment for 902T. Pull all new outdoor cable, modify cable tray, install new cable tray.  
ATCO 05-May-25 09:00 30-May-25 17:30 25.35 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 05-May-25 09:00 30-May-25 17:30 25.35 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 05-May-25 09:00 30-May-25 17:30 25.35 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, 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.  
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  
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.  

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: 2023-03-29   14:37:01


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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