Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2019-04-27

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
Syncrude 04-Oct-18 09:00 15-Jan-20 20:00 468.5 Days
Continuous
Mildred T3 (Syncrude Mildred Lake) damaged transformer repairs  
ENMAX, ALTALINK 12-Mar-19 14:53 06-Jun-19 12:00 85.88 Days
Continuous
1080L (ENMAX 65 - ENMAX 25) forced outage  
ALTALINK 01-Apr-19 10:00 15-Jul-19 17:00 105.29 Days
Continuous
251s SR1 (251s Whitla),251s 252 (251s Whitla),251s 552 (251s Whitla),251s Whitla 240kV Bus 1 construct new equipment  
SUNCOR 15-Apr-19 08:00 28-Apr-19 18:00 13.42 Days
Continuous
29EDD-1 Millennium,29EDD-1 29EDD1s952 (29EDD-1 Millennium),29EDD-1 29EDD1s1052 (29EDD-1 Millennium),29EDD-1 Millennium 260kV West Bus 1 5 years maintenance  
BCH 15-Apr-19 09:00 30-Apr-19 17:00 15.33 Days
Continuous
5L72 (Mica Creek - Nicola) urgent repair work AB-BC
ALTALINK 16-Apr-19 07:00 05-May-19 18:00 19.46 Days
Continuous
1206L (89s Ellerslie - 12s Heartland) spacer and damper replacement on structures #4 - 191  
ALTALINK, Lethbridge 23-Apr-19 10:00 09-May-19 18:00 16.33 Days
Continuous
725AL (618s Riverbend - 725L tap),725L (111s Coalbanks - 674s Lethbridge Bowron) replace 674S725E switch and component replacement  
ALTALINK 23-Apr-19 11:00 02-May-19 16:00 9.21 Days
Continuous
310P 3352 (310p Sundance),310P 69 (310p Sundance),310P 234N (310p Sundance),310P 512N (310p Sundance),310p T30 (310p Sundance),310P Sundance 69kV Bus,310P T33 (310P Sundance) migrate and commission controls and protection to new RTU and LAN  
ALTALINK 25-Apr-19 07:00 28-Apr-19 18:30 3.48 Days
Continuous
859L (20s Ghost - T793s Horse Creek),113L (20s Ghost - 33s Spray),150L (20s Ghost - 150L46),20s T1 (20s Ghost) Replace 20s149, 20s153, T1 CT’s Replace bus conductor and strain Insulators  
EPCOR 29-Apr-19 08:00 03-May-19 17:00 4.38 Days
Continuous
L2401 @ Lambton,803s L2401 (803s Lambton) breaker maintenance  
ALTALINK 29-Apr-19 08:00 27-May-19 17:00 28.38 Days
Continuous
320p2A & 320p61 Advice for Trans,320p1A,320p 152 (320p Keephills),320p 452 (320p Keephills),320p 252 (320p Keephills) replace 320p489, maintain 320p452 and replace 320p452 CTs  
ALTALINK 29-Apr-19 08:30 02-May-19 17:30 3.38 Days
Continuous
491L (252s Jarrow - 7L50 tap),252s2 (Affecting 419L) GOI,252s 2 (252s Jarrow) Replacing L1 A and B Protections and testing locally with 252 breaker  
ATCO 29-Apr-19 09:00 01-May-19 16:30 2.31 Days
Continuous
715S 704,7L95,7L95 (889s Mahkeses - 715s Leming Lake),715s 704 (715s Leming Lake) Breaker Maintenance & tie in bus lockout logic  
ATCO 29-Apr-19 11:30 30-Apr-19 17:00 29.5 Hours
Continuous
840S 504,840s 504 (840s McNeill) Install Cables In Filter Bay AB-SK
ALTALINK 29-Apr-19 11:30 01-May-19 17:00 2.23 Days
Continuous
163s T2 (Tx18482) GOI,163s T2 (163s Amoco Empress) Transformer maintenance  
ALTALINK 30-Apr-19 09:30 30-Apr-19 11:30 2 Hours
Daily
285s3202 GOI Techs will be on site to update DNP address on the following; 3202L 67/67N/79/L8 SEL351S.  
ALTALINK 01-May-19 07:30 01-May-19 18:00 10.5 Hours
Daily
268s24 Advice for Customer Customer high voltage equipment maintenance  
ENMAX 01-May-19 08:00 13-May-19 16:00 12.33 Days
Continuous
162s 240KV Bus. PT-Z42,162s Beddington 240 kV North Bus Fall Substation Washing. Upgrade Protection on 2-GSU-XF-0002  
ATCO 01-May-19 08:30 02-May-19 16:00 31.5 Hours
Continuous
840s 505 (840s McNeill),840S 505 Install Cables In Filter Bay AB-SK
ALTALINK 02-May-19 08:15 02-May-19 13:45 5.5 Hours
Daily
50L (44s-C21s) - GOI Urgent outage to replace termination on underground cable  
ALTALINK 03-May-19 08:00 05-May-19 18:00 2.42 Days
Continuous
252s 2 (252s Jarrow),526s 252 (526s Buffalo Creek),252s2,526s252 and 7L50 GOI,491L (252s Jarrow - 7L50 tap) Setting changes at 526s and end to end testing with 252s  
ENMAX, ALTALINK 04-May-19 08:00 04-May-19 18:00 10 Hours
Continuous
7.82L. 7.2TR. 7B138-7BT3. 7PT138-Z32,7.82L (42s Sarcee - ENMAX 7) Substation Washing  
ENMAX 06-May-19 08:00 06-May-19 16:00 8 Hours
Continuous
162s Beddington 240 kV North Bus,162s 240KV Bus. PT-Z41 Fall Substation Washing, Z41, RB132, RB131.  
EPCOR 06-May-19 08:00 06-May-19 17:00 9 Hours
Continuous
12BU2 Zone @ Genesee,330p Genesee 500 kV Bus 2,330p 1203 (330p Genesee),330p 1209 (330p Genesee),330p 1206 (330p Genesee),330P 12TC2 (330p Genesee) doble  
EPCOR 06-May-19 08:00 10-May-19 17:00 4.38 Days
Continuous
803s L2402 (803s Lambton),L2402 @ Lambton breaker maintenance  
ALTALINK 06-May-19 08:30 08-May-19 18:30 2.42 Days
Daily
89s T1(TX18724/25/26) GOI,89s T1 (89s Ellerslie) 89s T1-B South Rad Leak, 89s T1-A Rad Valve Leak, 89s T1-C Oil Leak from Model 11 GDR, 89s T1-B wash  
ALTALINK, Lethbridge 06-May-19 09:00 09-May-19 18:00 3.38 Days
Continuous
725AL (618s Riverbend - 725L tap),725L (111s Coalbanks - 674s Lethbridge Bowron),725L (L674s - 618s - L111s) - GOI Component Replacements: (725AL Str's Range 1-13) and (725L Str's Range 310-367)  
EPCOR, ALTALINK 06-May-19 09:30 09-May-19 17:00 3.31 Days
Continuous
1203L (320p Keephills - 510s Sunnybrook),1203 Line ( Sunnybrook - Keephills ) Line Maintenance & Upgrades  
ATCO 06-May-19 11:30 07-May-19 17:00 29.5 Hours
Continuous
840S 508,840s 508 (840s McNeill) Install Cables In Filter Bay AB-SK
EPCOR 07-May-19 08:00 07-May-19 17:00 9 Hours
Continuous
330P 12TC1 (330p Genesee),330p 1207 (330p Genesee),330p 1204 (330p Genesee),330p 1201 (330p Genesee),330P Genesee 500 kV Bus 1,12BU1 zone @ Genesee doble  
EPCOR, ALTALINK 08-May-19 08:00 08-May-19 17:00 9 Hours
Continuous
430L (330P Genesee - 510S Sunnybrook),430L (330P - 510S) @ Genesee Doble  
ATCO 08-May-19 08:30 09-May-19 17:00 1.35 Days
Continuous
840S 509,840s 509 (840s McNeill) Install Cables In Filter Bay AB-SK
ALTALINK, Lethbridge 09-May-19 08:00 09-May-19 14:00 6 Hours
Continuous
725L (111s Coalbanks - 674s Lethbridge Bowron),725AL (618s Riverbend - 725L tap) replace 674S725E switch  
ALTALINK 10-May-19 07:00 03-Jun-19 18:00 24.46 Days
Continuous
180L (255s - Open Point 'C' - Open Point,180L (255s Vulcan - 928s East Stavely) Airbrake Replacements 197L2, 180L204, 180L205  
EPCOR 10-May-19 08:00 10-May-19 17:00 9 Hours
Continuous
1204 @ Genesee,330p 1204 (330p Genesee) doble  
ATCO 11-May-19 07:00 06-Jun-19 17:00 26.42 Days
Continuous
791S 706,791S 701T,791s 706 (791s Rainbow Lake),791s 701T (791s Rainbow Lake) Refurbish transformer  
BCH 12-May-19 12:00 12-May-19 13:00 60 Mins
Continuous
5L71 (Mica Creek - Nicola),5L72 (Mica Creek - Nicola) MCA blackstart test AB-BC
ENMAX, ALTALINK 13-May-19 08:00 14-May-19 16:00 1.33 Days
Continuous
28.2TR (ENMAX 28),28.80L (42s Sarcee - ENMAX 28),28.80L. 28.2TR. 28PT138-Z31 HV SW Maintenance SW80, SW81, SW82, SW86, MD-28.2TR.  
SUNCOR 13-May-19 08:00 26-May-19 18:00 13.42 Days
Continuous
29EDD-1 Millennium,29EDD-1 952_102 (29EDD-1 Millennium),29EDD-1 952_101 (29EDD-1 Millennium) 5 years maintenance  
EPCOR, ALTALINK 13-May-19 09:30 16-May-19 17:00 3.31 Days
Continuous
1209 Line ( Genesee - Ellerslie ),1209L (89s Ellerslie - 330p Genesee) Line Maintenance & Upgrades  
ALTALINK 13-May-19 09:30 07-Jun-19 18:00 25.35 Days
Continuous
89s T2(TX18727/28/33) GOI,89s T2 (89s Ellerslie) transformer maintenance: Re-gasket (T2-B), (T2-C) 240KV bushing leak, (T2-A) 240kV Bushing Leak, (T2-B) Conservator Valve Leaking  
ATCO 13-May-19 11:30 14-May-19 17:00 29.5 Hours
Continuous
840S 510,840s 510 (840s McNeill) Install Cables In Filter Bay AB-SK
EPCOR 14-May-19 08:00 14-May-19 17:00 9 Hours
Continuous
L2405 @ Lambton,803s L2405 (803s Lambton) doble  
ALTALINK 15-May-19 07:00 16-May-19 18:00 1.46 Days
Continuous
320p T1 (320p Keephills),25KV bus GOI,320p T1,138kV Bus Replace 138 kV Bus PT, replace 25 kV Bus PT, replace metering on SS 1/2, T4 maintenance  
ALTALINK, ATCO 15-May-19 08:00 15-May-19 18:00 10 Hours
Daily
395s Station,174L/701L/7L77 GOI,174L (197s Bardo - 395s North Holden),7L77 (395s North Holden - 709s Vegreville),701L (395s North Holden - 223s Strome) 138kV bus insulators to be replaced, TX1 doble  
ENMAX 15-May-19 08:00 16-May-19 18:00 1.42 Days
Continuous
25B240-D140 (ENMAX 25),ENMAX 25 B240-D131 (ENMAX 25),25s. 25B240-D131. 25B240-D134. 25B240-D140. 240kV Bus HV SW MD maint SW131, SW137, SW145, SW149. Doble 25PT240-Z41. SF6 sample 25-D138, 25-D139. Substation Washing Z41, PT1080  
EPCOR 16-May-19 08:00 16-May-19 17:00 9 Hours
Continuous
1055L (816s Petrolia - 629s Argyll Transfer Station),1055L @ Petrolia Doble  
ALTALINK 16-May-19 08:15 16-May-19 16:45 8.5 Hours
Daily
281s T1 (Tx18897) GOI,281s T1 (281s Johnson) Investigate T1 leaks  
EPCOR, ALTALINK 17-May-19 08:00 17-May-19 17:00 9 Hours
Continuous
1044L @ Petrolia,1044L (805s Jasper - 816s Petrolia) Doble  
ENMAX 17-May-19 08:00 22-May-19 18:00 5.42 Days
Continuous
ENMAX 25 B240-D131 (ENMAX 25),ENMAX 25 B240-D132 (ENMAX 25),ENMAX 25 MD240-1GSU (ENMAX 25) HV SW MD maintenance  
ENMAX 19-May-19 08:00 19-May-19 16:00 8 Hours
Continuous
37.82L. HV Breaker Maintenance 37B138-37.82  
EPCOR 20-May-19 07:00 21-Jun-19 17:00 32.42 Days
Continuous
BA2 @ Bellamy & Argyll,240BA2 (814s Bellamy - 629s Argyll Transfer Station) Degass  
EPCOR 20-May-19 08:00 24-May-19 17:00 4.38 Days
Continuous
809 BKR @ Genesee - TIE TX2 NIS,330p 809 (330p Genesee) Breaker Maint  
ATCO 21-May-19 08:30 22-May-19 17:00 1.35 Days
Continuous
840s 506 (840s McNeill),840S 506 Install Cables In Filter Bay AB-SK
ALTALINK 21-May-19 12:00 30-May-19 16:00 9.17 Days
Continuous
42s T1 (42s Sarcee),42s 40 (42s Sarcee),42s T1 (Tx18508) GOI Replace 42s40 with new SF6 breaker  
ALTALINK 22-May-19 09:00 19-Jun-19 18:00 28.38 Days
Continuous
717L (17s - 262s) - GOI,717L (17s Benalto - 262s Rocky Mountain House) Component replacements between Structures #103 - 403  
ATCO 23-May-19 07:00 28-May-19 16:00 5.38 Days
Continuous
7L86 (822s Wolf Lake - 877s Foster Creek),7L86 Build t tap for new Athik sub connection  
ENMAX, ALTALINK 23-May-19 08:00 27-May-19 18:00 4.42 Days
Continuous
1080L.,1080L (ENMAX 65 - ENMAX 25) HV SW MD maint SW146, SW147, MD-1080@25sub. Doble 25PT240-1080. Doble 65PT240-1080. SF6 Sample 25-D138, 25-D139  
BCH 23-May-19 09:00 24-May-19 17:00 1.33 Days
Continuous
5L76 (Ashton Creek - Nicola) Annual Plan Request F20 AB-BC
ALTALINK 25-May-19 08:00 25-May-19 17:00 9 Hours
Daily
391s25 - GOI,391s 25 (391s Balzac) Install grading capacitors on 391s25.  
BCH 26-May-19 09:00 02-Aug-19 17:00 68.33 Days
Continuous
5L72 (Mica Creek - Nicola) switchgear roof replacement AB-BC
EPCOR, ALTALINK 27-May-19 08:00 31-May-19 17:00 4.38 Days
Continuous
430L (330P Genesee - 510S Sunnybrook),330p 807 (330p Genesee),807 BKR @ Genesee breaker maintenance  
SUNCOR 27-May-19 08:00 02-Jun-19 18:00 6.42 Days
Continuous
29EDD-1 952_104 (29EDD-1 Millennium),29EDD-1 Millennium 5 years maintenance  
ALTALINK 27-May-19 10:15 30-May-19 17:45 3.31 Days
Continuous
13s T2(TX18672) GOI,13s T2 (13s Deerland) transformer maintenance: Blown H1 LA, LTC FER/MR (maint) 245/145kV, LTC FER/MR (doble)245/145kV3, 1" sample valve sweating, Rad Valves Sweating  
ALTALINK 29-May-19 08:00 29-May-19 16:30 8.5 Hours
Daily
33s 2 (33s Spray) maintain 138kV SF6 gas breaker  
EPCOR 30-May-19 07:00 31-May-19 17:00 1.42 Days
Continuous
C2402 @ Cloverbar S/S,987s C2402 (987s Clover Bar) Commissioning of Anti- Islanding Upgrade Project  
EPCOR 03-Jun-19 08:00 14-Jun-19 17:00 11.38 Days
Continuous
805s T3 (805s Jasper),TX3 @ Jasper Bushing Replacement  
ATCO, ALTALINK 03-Jun-19 08:00 02-Aug-19 16:00 60.33 Days
Continuous
9LS1M,840S McNeill Station,830L (562s Cypress - 840s McNeill Station),840S CONVERTER,7L830 2019 McNeill Shutdown for Protection Upgrade Install,
25KV Protection Upgrade Project. Once started will not be able to return to service until project is completed.
AB-SK
EPCOR, ALTALINK 03-Jun-19 09:00 08-Jun-19 17:00 5.33 Days
Continuous
1209L outage 330P @ Genesee S/S and 89S,1209L (89s Ellerslie - 330p Genesee) Relay Settings changes to 1209L protection to enable single pole tripping  
ALTALINK 04-Jun-19 07:45 05-Jun-19 16:45 1.38 Days
Continuous
42s76 (C1 & C2) - GOI,42s 76 (42s Sarcee) Maintain 240kV SF6 cap bank breaker  
BCH 04-Jun-19 09:00 14-Jun-19 17:00 10.33 Days
Continuous
5L72 (Mica Creek - Nicola) Spacer Replacement: 5L72 Outage AB-BC
ALTALINK 05-Jun-19 07:30 05-Jun-19 16:30 9 Hours
Daily
995L (17s Benalto - 995AL tap),995L (Open-end) Advice Open due to double TPR outage. 9062R - 9495R Radio replacement.  
ALTALINK, ATCO 05-Jun-19 08:00 06-Jun-19 17:00 1.38 Days
Daily
1035L (2075s Newell - 244s Bowmanton),1035L (244s - 2075s) Advice Trip testing of new Shamrock (1018s) RAS  
ALTALINK 05-Jun-19 23:00 06-Jun-19 03:00 4 Hours
Continuous
995L (17s Benalto - 995AL tap),17s 995L Open - Advice Commission new airbreak control module and supervisory control of switch 17s995N.  
ALTALINK, EPCOR 07-Jun-19 06:30 10-Jun-19 17:30 3.46 Days
Continuous
1056L (89s-E629s Epcor - Advice,1056L (89s Ellerslie - 629s Argyll Transfer Station) Epcor Insulator Washing  
EPCOR, ALTALINK 07-Jun-19 07:00 10-Jun-19 17:00 3.42 Days
Continuous
1056L ( Argyll - Ellerslie ),1056L (89s Ellerslie - 629s Argyll Transfer Station) Washing program  
ATCO 10-Jun-19 07:00 14-Jun-19 17:30 4.44 Days
Continuous
2075s ACF11 (2075s Newell),2075S ACF11 Maintenance on 901T, ACF11 Inspection, PLC Firmware Upgrades, Relay Firmware Upgrades, & Glycol Bypass Calibration
SVC Redundancy Lost
 
SUNCOR 10-Jun-19 08:00 16-Jun-19 18:00 6.42 Days
Continuous
29EDD-1 Millennium,29EDD-1 29EDD1s852 (29EDD-1 Millennium) 5 years maintenance  
ENMAX 10-Jun-19 08:00 18-Jun-19 18:00 8.42 Days
Continuous
ENMAX 65 B138-D83 (ENMAX 65),65.1TR (ENMAX 65),ENMAX 65 B138-D81 (ENMAX 65),ENMAX 65 B240-D130 (ENMAX 65),ENMAX 65 B240-D133 (ENMAX 65) Doble 65PT240-Z41. 65PT138-Z31. 65CAP138-C3. 65CAP240-C1. Doble test transformer. Check reversing Switch  
EPCOR 10-Jun-19 08:00 21-Jun-19 17:00 11.38 Days
Continuous
330P 12TC2 (330p Genesee),TX2 @ Genesee DGA upgrade  
ALTALINK, ENMAX 10-Jun-19 09:00 13-Jun-19 18:00 3.38 Days
Continuous
937L (102s - 5s) - GOI,937L (102s Langdon - 5s East Calgary) Replacing insulators between Structures #50 - 64  
Medicine Hat 11-Jun-19 07:00 13-Jun-19 08:00 2.04 Days
Continuous
MH-16L (MH69S-2 - MH69S-16),MH69s2 MH69_224 (MH69s2 North Industrial) replace pole and line maintenance  
ALTALINK 11-Jun-19 08:00 11-Jun-19 16:30 8.5 Hours
Daily
511s4852 Open Breaker Advice,511s 4852 (511s Crossings) Wire in a replacement K03 relay contactor in the control cabinet for 511s74 airbreak and operate the airbreak with no current flowing through it, will see 511s74 airbreak open and close during testing  
ALTALINK 14-Jun-19 07:00 14-Jun-19 18:00 11 Hours
Daily
925L (63s Red Deer - 74s Janet),925L (63s - 74s) - GOI Replace insulator on 925L336  
ATCO 17-Jun-19 07:00 21-Jun-19 17:30 4.44 Days
Continuous
2075S ACF21,2075s ACF21 (2075s Newell) Maintenance on 902T, ACF21 Inspection, Move Network Switches, & Glycol Bypass Calibration
SVC Redundancy Lost
 
ALTALINK 17-Jun-19 09:00 20-Jun-19 18:00 3.38 Days
Continuous
936L (102s - 5s) - GOI,936L (102s Langdon - 5s East Calgary) Replacing insulators between Structures #50 - 64  
ENMAX 19-Jun-19 08:00 27-Jun-19 18:00 8.42 Days
Continuous
ENMAX 65 B240-D132 (ENMAX 65),ENMAX 65 B240-D135 (ENMAX 65),ENMAX 65 B138-D85 (ENMAX 65),ENMAX 65 B138-D82 (ENMAX 65),65.2TR (ENMAX 65) Doble 65PT240-Z42. 65PT138-Z32. 65PT138-C4, 65PT240-C2. Doble test transformer. Check reversing Switch  
EPCOR 24-Jun-19 07:00 12-Jul-19 17:00 18.42 Days
Continuous
CV5 @ Castledowns & Victoria,CV5 (557s Castle Downs - 511s Victoria) CV5 Inspections  
ATCO 24-Jun-19 08:00 28-Jun-19 17:00 4.38 Days
Continuous
9L59,9L59 (972s Tinchebray - 801s Anderson) 9L59- GOI permit for Clearance Mitigation

6 more structures left to change for clearance Mitigation.
 
ATCO 24-Jun-19 09:30 26-Jun-19 17:00 2.31 Days
Continuous
7L702,7L702 (137s Sedgewick - 757s Battle River) Change Arms and Insulators on 7L702  
SUNCOR 01-Jul-19 08:00 21-Jul-19 18:00 20.42 Days
Continuous
29EDD-1 Millennium 5 year maintenance  
SUNCOR 01-Jul-19 08:00 21-Jul-19 18:00 20.42 Days
Continuous
29EDD-3 29Edd-3 maintenance  
SUNCOR 01-Jul-19 09:00 21-Jul-19 18:00 20.38 Days
Continuous
30EDD-2 maintenance & testing on breaker  
ALTALINK 02-Jul-19 06:00 11-Jul-19 19:00 9.54 Days
Continuous
1206L (89s Ellerslie - 12s Heartland),1206L (89s - 12s) - GOI Spacer and damper replacement on Structures # 4 - 191  
EPCOR, ALTALINK 02-Jul-19 07:00 05-Jul-19 17:00 3.42 Days
Continuous
1044L (805s Jasper - 816s Petrolia),1044L Petrolia & Jasper Structure Refurbishment & Upgrades  
EPCOR, ALTALINK 02-Jul-19 08:00 02-Jul-19 17:00 9 Hours
Continuous
920L (37s North Calder - 557s Castle Downs),920L W @ Castledowns & North Calder doble  
ATCO 02-Jul-19 09:30 04-Jul-19 17:00 2.31 Days
Continuous
7L702 (137s Sedgewick - 757s Battle River),7L702 Change Arms and Insulators on 7L702  
EPCOR, ALTALINK 04-Jul-19 08:00 05-Jul-19 17:00 1.38 Days
Continuous
915L (38s East Edmonton - 987s Clover Bar),915L @ Cloverbar & East Edmonton doble  
EPCOR, ALTALINK 08-Jul-19 07:00 12-Jul-19 17:00 4.42 Days
Continuous
908L (89s Ellerslie - 816s Petrolia),908L Petrolia & Ellerslie Structure Refurbishment & Upgrades  
EPCOR, ALTALINK 08-Jul-19 08:00 09-Jul-19 17:00 1.38 Days
Continuous
947L @ Cloverbar & Ellerslie,947L (89s Ellerslie - 987s Clover Bar) Doble  
ATCO 08-Jul-19 09:30 11-Jul-19 17:00 3.31 Days
Continuous
7L702,7L702 (137s Sedgewick - 757s Battle River) Change Arms and Insulators on 7L702  
EPCOR, ALTALINK 15-Jul-19 07:00 18-Jul-19 17:00 3.42 Days
Continuous
915L (38s East Edmonton - 987s Clover Bar),915L Cloverbar & 38S Structure Refurbishment & Upgrades  
ALTALINK 16-Jul-19 06:00 25-Jul-19 19:00 9.54 Days
Continuous
1212L (89s Ellerslie - 12s Heartland),1212L (89s - 12s) - GOI Spacer and damper replacement on Structures # 4 - 191  
ATCO 17-Jul-19 08:00 23-Jul-19 17:00 6.38 Days
Continuous
834s 902T (834s Wesley Creek),834S 902T Three Creeks Project Install the foundations and A-Frame for the new 240 kV bays  
ATCO 18-Jul-19 08:00 18-Jul-19 12:00 4 Hours
Continuous
791s 705 (791s Rainbow Lake),7L29 (850s Rainbow Cogen - 791s Rainbow Lake),791S 705 Test new RB4 protection  
SUNCOR 22-Jul-19 08:00 11-Aug-19 18:00 20.42 Days
Continuous
29EDD-1 Millennium 5 year maintenance  
EPCOR, ALTALINK 29-Jul-19 07:00 01-Aug-19 17:00 3.42 Days
Continuous
947L (89s Ellerslie - 987s Clover Bar),947L Cloverbar & Ellerslie Structure Refurbishment & Upgrades  
ENMAX, ALTALINK 29-Jul-19 08:00 29-Jul-19 16:00 8 Hours
Continuous
24.83L.,24.83L (74s Janet - ENMAX 24) SF6 gas sample 24B138-24.83L  
EPCOR, ALTALINK 02-Aug-19 08:00 02-Aug-19 17:00 9 Hours
Continuous
1239L (510s Sunnybrook - 330p Genesee),1239L @ Genesee Doble  
EPCOR 05-Aug-19 08:00 06-Aug-19 17:00 1.38 Days
Continuous
P2401 @ Petrolia,816s P2401 (816s Petrolia) Splitting of DC  
EPCOR 08-Aug-19 08:00 09-Aug-19 17:00 1.38 Days
Continuous
816s P2402 (816s Petrolia),P2402 @ Petrolia Splitting the DC  
EPCOR 12-Aug-19 08:00 13-Aug-19 17:00 1.38 Days
Continuous
P2403 @ Petrolia,816s P2403 (816s Petrolia) Splitting the DC  
SUNCOR 12-Aug-19 08:00 08-Sep-19 18:00 27.42 Days
Continuous
30EDD-1 5 year 624T transformer maintenance and repair  
EPCOR 15-Aug-19 08:00 16-Aug-19 17:00 1.38 Days
Continuous
Poundmaker 2404 (Poundmaker),P2404 @ Petrolia Splitting the DC  
SUNCOR 16-Aug-19 08:00 29-Sep-19 18:00 44.42 Days
Continuous
29EDD-56 5 year maintenance  
EPCOR 19-Aug-19 08:00 20-Aug-19 17:00 1.38 Days
Continuous
P2405 @ Petrolia,816s P2405 (816s Petrolia) Splitting the DC  
ENMAX, ALTALINK 19-Aug-19 08:00 13-Sep-19 16:00 25.33 Days
Continuous
932L (74s Janet - 162s Beddington) Line Protection Upgrade  
BCH 20-Aug-19 09:00 06-Sep-19 17:00 17.33 Days
Continuous
5L71 (Mica Creek - Nicola) Spacer Replacement: 5L71 Outage AB-BC
EPCOR 22-Aug-19 08:00 23-Aug-19 17:00 1.38 Days
Continuous
816s P2406 (816s Petrolia),P2406 @ Petrolia Splitting the DC  
ATCO 28-Aug-19 07:00 02-Sep-19 17:00 5.42 Days
Continuous
766S 901T,766S 701,766s 901T (766s Nevis) RAS modifications for the Pattern Lanfine WAGF project  
EPCOR 02-Sep-19 07:00 27-Sep-19 17:00 25.42 Days
Continuous
TX2 @ Petrolia,816s T2 (816s Petrolia) Tap changer & Oil reclamation  
EPCOR 02-Sep-19 07:00 27-Sep-19 17:00 25.42 Days
Continuous
987s CC721 (987s Clover Bar),CC721 @ Cloverbar Breaker Replacement  
ATCO 05-Sep-19 07:00 10-Sep-19 17:00 5.42 Days
Continuous
7L224 (774s Monitor - 650s Hansman Lake),774s 701 (774s Monitor),7L224,774S 701 RAS modifications for the Pattern Lanfine WAGF project  
BCH 09-Sep-19 09:00 10-Sep-19 17:00 1.33 Days
Continuous
2L294 (Nelway - A.A. Lambert) "Annual Plan Request F20 - Ian Kozicky
2L294 out from NLY to AAL for structure replacements (HELI WORK)"
AB-BC
BCH 09-Sep-19 09:00 20-Sep-19 17:00 11.33 Days
Continuous
2L294 (Nelway - A.A. Lambert) Annual Plan Request F20 - Ian Kozicky
2L294 Out from NLY to AAL for Insulators Replacement and Arcing Horn Installation
AB-BC
ALTALINK 10-Sep-19 08:15 12-Sep-19 17:15 2.38 Days
Continuous
370s T5 (370s North Lethbridge),370s T5 (Tx18510) GOI Maintain and doble T5  
ALTALINK 12-Sep-19 18:30 12-Sep-19 19:30 60 Mins
Daily
673L & T1,283s 138kV Partial Bus,283s T1 (283s Violet Grove),836L (61s Lodgepole - 283s Violet Grove),673L (283s Violet Grove - 131s Moon Lake) To energize the Cap Bank new CT15  
ALTALINK, ATCO 13-Sep-19 07:00 20-Sep-19 18:00 7.46 Days
Continuous
T1,409s T3 (409s Shell Scotford),409s Shell Scotford 138 kV Bus 2,857L (409s Shell Scotford - 410s Josephburg),ALC02L (409s Shell Scotford - 879s Scotford Upgrader),409s T1 (409s Shell Scotford),409s 138 Bus 2,T3 GOI Includes 857L and ALC02L in isolation. T1 Bushing replacement Insulator replacement (ALC02L strain), 409s857W breaker maintenance, Wildlife cover on 25 kV Busses, 857L B protection upgrade, NGR maintenance – Shell  
ALTALINK 16-Sep-19 07:00 16-Sep-19 12:00 5 Hours
Daily
38s 138kV BUS 1 - GOI,38s East Edmonton 138 kV Bus 1 Various Switch & Hot Spot Repairs  
ALTALINK, Lethbridge 16-Sep-19 08:00 20-Sep-19 17:00 4.38 Days
Continuous
824L (593s Lethbridge Lakeview - 618s Riverbend) replace 593S4 motorized A/B  
ALTALINK 16-Sep-19 10:15 25-Sep-19 17:45 9.31 Days
Continuous
64s T2 (Tx18748) GOI,64s T2 (64s East Crossfield) Replace 240/138kV Bushings  
ATCO 19-Sep-19 08:00 05-Dec-19 16:00 77.38 Days
Continuous
740S 144Kv Main Bus,740s 703T (740s H.R.Milner),740S 703T Install new 703T and reconfigure main bus  
ALTALINK, ATCO 23-Sep-19 07:00 29-Sep-19 18:00 6.46 Days
Continuous
ALC01L (409s Shell Scotford - 408s Air Liquide Scotford),856L (409s Shell Scotford - 410s Josephburg),409s T2 (409s Shell Scotford),409s Shell Scotford 138 kV bus B1,T2 GOI,409s 138 Bus 1 Includes 856L and ALC01L in isolation. T2 Bushing replacement Insulator replacement (ALC01L strain), 409s20 breaker maintenance, Wildlife cover on 25 kV Busses, 856L B protection upgrade, ALC01L protection upgrade, NGR maintenance – Shell  
SUNCOR 30-Sep-19 08:00 17-Oct-19 18:00 17.42 Days
Continuous
29PL9-5 (29EDD-1 Millennium - 29EDD-34) 5 year maintenance  
ENMAX, ALTALINK 07-Oct-19 08:00 25-Oct-19 16:00 18.33 Days
Continuous
24.83L (74s Janet - ENMAX 24) Transmission Line Relocate  
ALTALINK, ATCO 09-Oct-19 07:30 09-Oct-19 12:29 4.98 Hours
Daily
526s152 (7L129) GOI,7L129 (526s Buffalo Creek - 918s Bauer),526s 152 (526s Buffalo Creek) tank heater repair  
ALTALINK, ATCO 09-Oct-19 12:30 09-Oct-19 17:30 5 Hours
Daily
526s 252 (526s Buffalo Creek),7L50 (526s Buffalo Creek - 7L50D2),526s252 (7L50) GOI tank heater repair  
ATCO 17-Oct-19 08:00 01-Nov-19 16:00 15.33 Days
Continuous
740S 701,740s 701 (740s H.R. Milner) replace breaker and re conductor switches  
SUNCOR 18-Oct-19 08:00 03-Nov-19 18:00 16.46 Days
Continuous
29PL9-6 (29EDD-1 Millennium - 29EDD-34) 5 year maintenance  
ENMAX 02-Nov-19 08:00 30-Nov-19 18:00 28.46 Days
Continuous
ENMAX 25 B240-D134 (ENMAX 25),ENMAX 25 MD240-2GSU (ENMAX 25),ENMAX 25 B240-D135 (ENMAX 25) HV SW MD maintenance  
ATCO, CapitalPower 07-Nov-19 07:00 07-Nov-19 17:00 10 Hours
Continuous
615S Halkirk,Halkirk Wind Farm Attach new in out station  
ENMAX, ALTALINK 18-Nov-19 08:00 13-Dec-19 16:00 25.33 Days
Continuous
918L (281s Johnson - 162s Beddington) line protection upgrade  
ATCO 05-Dec-19 08:00 19-Dec-19 16:00 14.33 Days
Continuous
740S 704,7L20 (810s Dome Cutbank - 740s H.R.Milner),7L20,740s 704 (740s H.R. Milner) replace breaker and re conductor switches  
CapitalPower 07-Dec-19 07:00 12-Dec-19 17:00 5.42 Days
Continuous
615S Halkirk Reroute OPGW test and commission.  
ATCO 07-Jan-20 08:00 27-Jan-20 17:00 20.38 Days
Continuous
834s 902T (834s Wesley Creek),834S 902T Three Creeks Project
Install the 240 kV switches (close proximity to energized bus),
String the flex bus between the bus A-Frames and line A-Frames
Re configure the pipe bus to its final configuration
Commission 902T logic to new breakers
 
ATCO 13-Jan-20 08:00 17-Jan-20 17:00 4.38 Days
Continuous
7L131,7L131 (834s Wesley Creek - 905s Meikle) To facilitate the installation of the new 9L124 and 9L139 we need to lower 7L08, 7L131 and 7L106  
ATCO 20-Jan-20 07:00 23-Jan-20 16:00 3.38 Days
Continuous
9L59 (972s Tinchebray - 801s Anderson),9L59 Outage for Garden Plain Wind Project  
ATCO 20-Jan-20 08:00 24-Jan-20 17:00 4.38 Days
Continuous
7L106,7L106 (834s Wesley Creek - 905s Meikle) To facilitate the installation of the new 9L124 and 9L139 we need to lower 7L08, 7L131 and 7L106  
ENMAX 03-Feb-20 08:00 14-Feb-20 16:00 11.33 Days
Continuous
162.81L (ENMAX 162 Beddington - 391S Balzac) Line Protection Upgrade  
ATCO 06-Mar-20 07:00 13-Mar-20 17:00 7.38 Days
Continuous
9L101,9L101 (2005s Secord - 957s McClelland) Line move for mine expansion.
Attach new line to existing 9L101
 
ATCO 03-Aug-20 07:00 03-Nov-20 17:00 92.46 Days
Continuous
972S 905B,972s 905B (972s Tinchebray) Halkirk 2 Windfarm Project  
SUNCOR 26-Aug-20 09:00 05-Sep-20 18:00 10.38 Days
Continuous
29PL9-14 (29EDD-56 - 29EDD-34),29PL9-15 (29EDD-56 - 29EDD-34) maintenance on bus 29PP-41F  
ATCO 14-Sep-20 07:00 23-Sep-20 17:00 9.42 Days
Continuous
972S 900BS1 Installing new 240Kv Bay (connect 907B to BUS 1) for 620S Goldeye substation connection  
SUNCOR, ATCO 14-Sep-20 09:00 20-Sep-20 18:00 6.38 Days
Continuous
29EDD-1 Millennium,29PL9-2 (29EDD-1 Millennium - 848s Ruth Lake) 5 and 10 year maintenance  
ATCO 23-Sep-20 07:00 25-Sep-20 17:00 2.42 Days
Continuous
972S 900BS2,9L16 (972s Tinchebray - 755s Cordel),9L16 Installing new 240Kv Bay (connect 909A to BUS 2) for 620S Goldeye substation connection
Cutover 9L16 to New Bay
 
ATCO 25-Sep-20 07:00 28-Sep-20 17:00 3.42 Days
Continuous
9L177 Installing new 240Kv Bay for 620S Goldeye substation connection
Cutover 9L177 to New Bay
 
ATCO 28-Sep-20 07:00 29-Sep-20 17:00 1.42 Days
Continuous
9L62 Installing new 240Kv Bay for 620S Goldeye substation connection
String 9L62 into 972S Tinchebray
 
ATCO, ALTALINK 22-Oct-20 07:00 27-Oct-20 17:00 5.42 Days
Continuous
7L77,7L65,7L65 (709s Vegreville - 710s Vermilion),7L77 (395s North Holden - 709s Vegreville) 7L65 Rebuild Project  
ATCO 15-Dec-20 07:00 23-Dec-20 17:00 8.42 Days
Continuous
730s 704 (730s Rycroft),730S 704,730S 702,7L73 (730s Rycroft - 829s Boucher Creek),730s 703 (730s Rycroft),730s 702 (730s Rycroft) SVC addition and 144 kv bus rebuild.  
ATCO 05-Jan-21 08:00 08-Jan-21 16:00 3.33 Days
Continuous
9L20 (766s Nevis - 755s Cordel),9L20 56772 Nevis Transformer Addition
9L20 Open -ended
 
ATCO 09-Jan-21 08:00 12-Jan-21 16:00 3.33 Days
Continuous
9L912,9L912 (766s Nevis - 63s Red Deer) 56772 Nevis Transformer Addition
9L912 Open -ended
 
ATCO 25-Jan-21 08:00 26-Jan-21 16:00 1.33 Days
Continuous
766S 901T,9L20,9L912 56772 Nevis Transformer Addition
Tie-in to the new bus for 902T
901T OOS
9L20 OPEN-ENDED
9L912 OPEN-ENDED
 

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

Prepared On: 2019-04-17   3:28:18 PM


This document and the information contained herein are based upon information and data which by their nature contain a degree of uncertainty and are subject to change. In addition, this document may contain information and data from public sources and/or third parties, which have been assumed to be accurate and complete and have not been verified. Accordingly, the Independent System Operator, operating as the Alberta Electric System Operator (the "AESO") makes no warranty, representation or guarantee, express or implied, with respect to this document or the information contained herein, including, but not limited to, any warranty, representation or guarantee of accuracy, completeness, timeliness, reliability, availability, absence of computer virus, non- infringement, merchantability or suitability for any purpose. Under no circumstances will the AESO, its members, officers, employees, contractors or agents, or any of their respective affiliates, be liable for any errors or omissions in, or any losses, damages or claims whatsoever, whether in contract, tort or otherwise, arising from use of or reliance upon, this document or any information contained herein.

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