Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2019-02-23

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 31-Mar-19 20:00 178.46 Days
Continuous
Mildred T3 (Syncrude Mildred Lake) damaged transformer repairs  
ALTALINK 14-Jan-19 13:00 14-Mar-19 14:00 59 Days
Continuous
902L (19s Wabamun - 310p Sundance),1046L (310p Sundance - 338s Cherhill) replacing structures #11 & 12,this portion of 902L remain under a separate GOI zone to prevent mis-coordination  
ATCO, ALTALINK 01-Feb-19 07:00 24-Feb-19 18:00 23.46 Days
Continuous
789L (818s Winefred - 898s Heart Lake) install new line airbreaks  
ALTALINK 12-Feb-19 07:00 09-Mar-19 19:00 25.5 Days
Continuous
1206L (89s Ellerslie - 12s Heartland) spacer and damper replacement  
EPCOR 19-Feb-19 07:00 25-Feb-19 17:00 6.42 Days
Continuous
657s Summerside T1 (657s Summerside) relay maintenance  
BCH 19-Feb-19 09:00 01-Mar-19 17:00 10.33 Days
Continuous
1L274 (Britt Creek - 1D4L274) replace end-of-life structures and related defects AB-BC
ALTALINK 19-Feb-19 12:00 27-Feb-19 16:00 8.17 Days
Continuous
926L (310p Sundance - 17s Benalto) component replacements and maintenance  
ATCO 20-Feb-19 10:30 24-Feb-19 15:00 4.19 Days
Continuous
7L199 (347s Fox Creek - 741s Fox Creek) relocate poles 30 36  
ATCO 24-Feb-19 07:00 12-Mar-19 17:00 16.38 Days
Continuous
7L67,824S 701TCS,824S 701T Replace 701TCS with BKR 701 and GSW 701A and protection upgrade
Mobile sub in service, 824S Radial fed from 851S Morse River. Mar 5 - 12, 2019 GOI isolation points shrunk down to 701A (NEW) and 501TD.
 
EPCOR 25-Feb-19 07:00 01-Mar-19 17:00 4.42 Days
Continuous
330p Genesee 500 kV Bus 2,330P 12TC2 (330p Genesee),12TC2 Outage @ 330P Genesee S/S relay maintenance  
EPCOR 25-Feb-19 07:00 01-Mar-19 17:00 4.42 Days
Continuous
557s T2 (557s Castle Downs),557s 2404 (557s Castle Downs),557s 2403 (557s Castle Downs),Tx2 Outage @ Castledowns S/S Relay Maintenance  
ENMAX, ALTALINK 25-Feb-19 08:00 26-Feb-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.  
ALTALINK 25-Feb-19 09:30 01-Mar-19 15:30 4.25 Days
Continuous
1081L (17s-281s) - GOI 1081L A&B Line protections replacement  
ALTALINK 25-Feb-19 10:30 07-Mar-19 16:30 10.25 Days
Continuous
310p 240 kV C Bus Advice,310p 2852 (310p Sundance),310P T36 (310p Sundance),310p T30 (310p Sundance),310p Sundance 240kV Bus C Migrate and commission all T30 & 310p2852 protections, breaker, status, controls, alarms, metering and remote access to the new RTU and LAN.  
ATCO 25-Feb-19 12:00 04-Mar-19 15:00 7.13 Days
Continuous
7L64,7L64 (930s Arcenciel - 7L64D5) 7L64 pole repairs from 2017 report  
ALTALINK 26-Feb-19 07:00 28-Feb-19 18:00 2.46 Days
Continuous
749L (899s-7L749D3) - GOI,749L (899s Edgerton - 7L749D3) Components ( washers) -Str's Range 296-436  
ALTALINK 26-Feb-19 08:00 26-Feb-19 17:30 9.5 Hours
Daily
69s T4 (69s North Barrhead),69s T4(TX18298) GOI 69sT4 MR TC diverter gear box leak, 69sT4 MR TC diverter gear box leak, 69sT4 MR crank seal/MA7 Counter  
ALTALINK 27-Feb-19 09:00 27-Feb-19 16:00 7 Hours
Daily
121s23N - GOI Maintain 25kV vacuum breaker  
ALTALINK 27-Feb-19 09:00 27-Feb-19 16:30 7.5 Hours
Daily
879L (244s-368s) - GOI,879L (368s Burdett - 244s Bowmanton) techs to troubleshoot and repair supervisory control on 244s879 air break switch  
ALTALINK 27-Feb-19 23:00 28-Feb-19 04:00 5 Hours
Daily
62s11 (62s Brazeau) maintenance  
ALTALINK 28-Feb-19 04:00 28-Feb-19 07:00 3 Hours
Daily
62s12 (62s Brazeau) maintenance  
Syncrude 01-Mar-19 09:00 15-Mar-19 22:00 14.5 Days
Continuous
D05 75 (D05 D05),D05 76 (D05 D05),D05 77 (D05 D05),D05 78 (D05 D05),Mildred_1225 (Syncrude Mildred Lake),Mildred_915 (Syncrude Mildred Lake),Mildred_135 (Syncrude Mildred Lake),Mildred_815 (Syncrude Mildred Lake),Mildred_235 (Syncrude Mildred Lake),Mildred_1935 (Syncrude Mildred Lake),Mildred_1435 (Syncrude Mildred Lake),Mildred_335 (Syncrude Mildred Lake),ML1 (Syncrude Mildred Lake - D05 Syncrude),Mildred Lake 72kV Bus B (Sycrude Mildred Lake),Mildred_1635 (Syncrude Mildred Lake) preventive maintenance  
ENMAX, ALTALINK 04-Mar-19 08:00 04-Mar-19 16:00 8 Hours
Continuous
23.80L (74s Janet - ENMAX 23),23.4TR (ENMAX 23),23.80L. 23.4TR repair hotspot on SW84@23sub. 23MD138-23.4TR West phase not closing  
ALTALINK 04-Mar-19 10:30 04-Mar-19 17:30 7 Hours
Daily
63s452 GOI,63s 452 (63s Red Deer) 240kV breaker maintenance  
EPCOR 04-Mar-19 12:00 04-Mar-19 16:00 4 Hours
Continuous
805s J2404 (805s Jasper),J2404 @ Jasper Nait Tour  
ALTALINK 05-Mar-19 08:00 05-Mar-19 15:00 7 Hours
Daily
118s754E (Affecting 754L) GOI,118s 754E (118s Canmore),754L (118s Canmore - 437s Baymag) Replace strain insulators on 754L at 118s  
ALTALINK, EPCOR 08-Mar-19 07:00 18-Mar-19 18:00 10.42 Days
Continuous
809L (510s - 320p) EPCOR - Advice,809L (320p Keephills - 510s Sunnybrook) Stringing new 12L41 overtop  
ALTALINK 09-Mar-19 06:00 28-Mar-19 18:00 19.46 Days
Continuous
1241L (510s - A939s) - GOI Stringing from 510s 'A' Frame dead end to 1241L Structure #1 and installing new 240 MVAR reactor; Open Points 'C' & 'F' will also be closed under this outage  
ENMAX 11-Mar-19 08:00 12-Mar-19 16:00 1.33 Days
Continuous
65B240-D135 Remediate Bird Mess Inside Insulating Blankets [AVANTIS].  
EPCOR, ALTALINK 11-Mar-19 10:00 11-Mar-19 17:00 7 Hours
Continuous
908L-E Outage @ E816S Petrolia S/S and 89S,908L (89s Ellerslie - 816s Petrolia) DFR upgrade  
ALTALINK 11-Mar-19 10:00 14-Mar-19 15:00 3.21 Days
Continuous
310p1252 GOI,310p 1252 (310p Sundance) Migrate and commission all 310P1252 associated breaker and breaker fail alarms, status, controls, metering and remote access to new RTU and LAN.  
ATCO 11-Mar-19 10:00 20-Mar-19 17:00 9.29 Days
Continuous
7L63 (788s Hotchkiss - 783s Cadotte River),7L63 7L63 crossarm replacements  
ALTALINK 11-Mar-19 11:00 21-Mar-19 12:00 10.04 Days
Continuous
310p452 GOI Breaker fail protection replacement  
ATCO 11-Mar-19 12:00 14-Mar-19 17:00 3.21 Days
Continuous
7L794,7L794 (157s Lac La Biche - 819s Whitby Lake) 7L794 pole changes  
ALTALINK 11-Mar-19 13:00 14-Mar-19 17:00 3.17 Days
Continuous
719L) GOI,575s 138kV Bus 1 (T1 Replace 138kV VTs (575s20), Maintain 575s719N  
ALTALINK 12-Mar-19 07:00 06-Apr-19 18:00 25.46 Days
Continuous
1212L (89s - 12s) - GOI Spacer and damper replacement on Structures # 4 - 191  
EPCOR 12-Mar-19 08:00 12-Mar-19 17:00 9 Hours
Continuous
J2408 @ Jasper - J240C1 CAP BANK - NIS,805s J2408 (805s Jasper),805s C1 (805s Jasper) breaker repair  
ALTALINK 12-Mar-19 08:00 14-Mar-19 16:00 2.33 Days
Continuous
520s T1 (520s Bennett),1201L (520s Bennett - BCH Cranbrook) Install Oil filter on Tx18413 AB-BC
MONTANA 12-Mar-19 08:00 14-Mar-19 16:00 2.33 Days
Continuous
MATL (120s Picture Butte - Montana) Install Oil filter on Tx18413 AB-MATL
ATCO 12-Mar-19 08:30 12-Mar-19 12:00 3.5 Hours
Continuous
930S Synchronous Condenser,930S 702T To remove bird nests on the structures in the 13.8 KV bus work around 406R and 402TD1.  
ATCO 12-Mar-19 09:00 14-Mar-19 14:00 2.21 Days
Continuous
834S 708 Leak Detection and Repair with ABB Manufacturer representative on Site, 708 OOS for the Duration of the work  
EPCOR, ALTALINK 13-Mar-19 07:00 14-Mar-19 17:00 1.42 Days
Continuous
1044L (805s Jasper - 816s Petrolia),1044L Outage @ E816S Petrolia S/S and E805S Jasper S/S DFR Upgrade  
ENMAX 13-Mar-19 08:00 13-Mar-19 16:00 8 Hours
Continuous
65B240-D134 Counter Repair Near and Center Phases  
EPCOR 13-Mar-19 08:00 14-Mar-19 17:00 1.38 Days
Continuous
TX1 @ East industrial,52s T1 (52s East Industrial) 240CVT41 replacement  
ALTALINK 14-Mar-19 14:00 21-Mar-19 16:00 7.08 Days
Continuous
902L (19s Wabamun - 310p Sundance),1046L (338s Cherhill - 19s Wabamun),902L/1046L (310p - 19s - 338s) - GOI Valard will be closing temporary Open Point 'A', 'B' & 'C' and removing temporary bypass between 902L & 1046L  
ENMAX, ALTALINK 16-Mar-19 08:00 17-Mar-19 18:00 1.42 Days
Continuous
7.82L. ZPT138-Z32,7PT138-Z32 (ENMAX 7),7.82L (42s Sarcee - ENMAX 7) P#1787. 7 sub transformer upgrade Phase 3. Initial energization of 7B138-7BT3  
EPCOR 18-Mar-19 07:00 19-Mar-19 17:00 1.42 Days
Continuous
1055L Outage @ E816S Petrolia S/S and E814S Bellamy S/S,1055L (816s Petrolia - 629s Argyll Transfer Station) DFR Upgrade  
ATCO 18-Mar-19 08:00 21-Mar-19 17:00 3.38 Days
Continuous
9L59,9L59 (972s Tinchebray - 801s Anderson) 9L59- GOI permit for Clearance Mitigation

6 more structures left to change for clearance Mitigation.
 
SUNCOR 18-Mar-19 08:00 24-Mar-19 18:00 6.42 Days
Continuous
29PL9-13 (29EDD-34 - 29EDD-65) broken strand repair  
ATCO 19-Mar-19 08:00 20-Mar-19 17:00 1.38 Days
Continuous
7L760 (7L760D2 - 767s Oyen),7L760 to install DLR systems/wind and weather monitors  
ALTALINK 19-Mar-19 08:00 21-Mar-19 16:00 2.33 Days
Continuous
50L (44s Bearspaw Plant - ENMAX 21),50L (44s-C21s) - GOI 50L vault inspection  
ALTALINK 19-Mar-19 08:15 19-Mar-19 12:45 4.5 Hours
Daily
788L (157s Lac La Biche - 788L Tap),788L (157s-704L106B) - GOI High Load Move - 8.72 meters high - moving from Lloydminster to Elinor Lake Resort - NW-20-65-11-4; travel under 788 Line between structures 7 & 8 over hwy 55/36  
ALTALINK 19-Mar-19 08:30 19-Mar-19 16:00 7.5 Hours
Daily
42s60 (T2) GOI,42s T2 (42s Sarcee) Maintain 138kV SF6 breaker  
EPCOR, ALTALINK 20-Mar-19 07:00 21-Mar-19 17:00 1.42 Days
Continuous
1139L Outage @ E816S Petrolia S/S and 367S,1139L (367s Harry Smith - 816s Petrolia) DFR Upgrade  
ALTALINK 20-Mar-19 08:00 21-Mar-19 12:00 28 Hours
Continuous
310p 240 kV B Bus GOI Breaker fail trip testing  
Lethbridge 21-Mar-19 08:00 21-Mar-19 16:00 8 Hours
Continuous
813L (241s Lethbridge Uplands - 146s Lethbridge MacDonald) replace substation transformer  
ALTALINK, Lethbridge 21-Mar-19 08:00 21-Mar-19 16:00 8 Hours
Continuous
734L (241s Lethbridge Uplands - 370s North Lethbridge) replace substation transformer  
ALTALINK 21-Mar-19 13:00 21-Mar-19 16:00 3 Hours
Daily
310p552 Advice Breaker fail trip testing from 310p452  
EPCOR 25-Mar-19 07:00 26-Mar-19 17:00 1.42 Days
Continuous
Tx1 Outage @ E816S Petrolia S/S,816s T1 (816s Petrolia) DFR upgrade  
ATCO 25-Mar-19 08:00 28-Mar-19 17:00 3.38 Days
Continuous
7L32,7L32 (862s South Bezanson - 813s Little Smoky) Replace rotten cross arms from inspection  
ALTALINK 25-Mar-19 10:00 28-Mar-19 16:00 3.25 Days
Continuous
919L (310p - 77s) Advice,919L (310p Sundance - 77s Sagitawah) migrate and commission protections to new RTU and LAN  
ATCO 25-Mar-19 10:00 03-Apr-19 17:00 9.29 Days
Continuous
7L63 (788s Hotchkiss - 783s Cadotte River),7L63 7L63 crossarm replacements  
ALTALINK 26-Mar-19 08:00 28-Mar-19 19:00 2.46 Days
Continuous
61s836N (Affecting 836L) GOI,836L (61s Lodgepole - 283s Violet Grove) replace CT’s for 61s836N  
ALTALINK 26-Mar-19 08:30 26-Mar-19 16:00 7.5 Hours
Daily
113L (20s Ghost - 33s Spray),113L (20s-33s) - GOI Maintain 33s113 & 20s113 breakers  
EPCOR 27-Mar-19 07:00 28-Mar-19 17:00 1.42 Days
Continuous
816s T2 (816s Petrolia),Tx2 Outage @ E816S Petrolia S/S DFR upgrade  
ALTALINK 27-Mar-19 08:00 27-Mar-19 16:00 8 Hours
Daily
33s76 (76L) GOI,76L (115s Mt. Allan - 33s Spray) Maintain 138kV SF6 gas breaker  
ENMAX 29-Mar-19 12:01 29-Mar-19 18:00 5.98 Hours
Continuous
28.80L. 28.2TR. 28PT138-Z31 Spring Substation Washing 28.80, 28.2, Z31  
ALTALINK 30-Mar-19 06:00 31-Mar-19 18:00 1.5 Days
Continuous
197L and 349s Station - GOI Cutting in the new portion of 197L  
ALTALINK, ATCO 01-Apr-19 08:00 02-Apr-19 18:00 1.42 Days
Continuous
789L (818s-602L1) - GOI,789L (818s Winefred - 898s Heart Lake) Connect New 789BL to 789L (Close Open Point 'A')  
ALTALINK 01-Apr-19 08:00 02-Apr-19 18:00 1.42 Days
Continuous
1117L (898s Heart Lake - 167s Ipiatik Lake),1117L (167s-A898s) - GOI Required due to proximity for connecting New 789BL to 789L (Parallel Right Of Way)  
ALTALINK 01-Apr-19 08:00 31-May-19 17:00 60.38 Days
Continuous
251s352 & 240 kV Bus 1 GOI Construct new equipment for connection to 1018s Shamrock  
SUNCOR 01-Apr-19 08:00 16-Jun-19 18:00 76.42 Days
Continuous
29EDD-1 29EDD1S1452 (29EDD-1 Millennium),29EDD-1 29EDD1s952 (29EDD-1 Millennium),29EDD-1 29EDD1s1052 (29EDD-1 Millennium),29EDD-1 29EDD1s852 (29EDD-1 Millennium),29EDD-1 952_102 (29EDD-1 Millennium),29EDD-1 952_101 (29EDD-1 Millennium),29EDD-1 952_104 (29EDD-1 Millennium),29EDD-1 Millennium 5 years maintenance  
ALTALINK 01-Apr-19 10:00 01-Apr-19 13:00 3 Hours
Continuous
725BL (725BL54 - 240s McBride Lake),725L (15s Fort MacLeod - 725BL54) replace 138KV Breaker  
ALTALINK 01-Apr-19 10:00 04-Apr-19 16:00 3.25 Days
Continuous
310p1452 & 310p1552 GOI,310p 1452 (310p Sundance),310p 1552 (310p Sundance) migrate and commission protections to new RTU and LAN  
ALTALINK 01-Apr-19 10:00 05-Apr-19 17:00 4.29 Days
Continuous
87s1252 GOI (914L North),914L (86s Bigstone - 87s Gaetz) Replace 87s Gaetz - 914L/L9 A & B line protections. Affects 914L North.  
ALTALINK 01-Apr-19 10:00 18-Apr-19 08:00 16.92 Days
Continuous
725L (L674s-15s) Open End - LETHBRIDGE I Replace 674S725W switch and supporting pad  
ALTALINK, Lethbridge 01-Apr-19 10:00 18-Apr-19 08:00 16.92 Days
Continuous
725L (674s Lethbridge Bowron - 725BL54) replace 674S725W switch  
ALTALINK 01-Apr-19 12:00 01-Apr-19 17:30 5.5 Hours
Daily
725L (15s - L674s - I_240s) - GOI Creating Open Point 'A' @ Structure #103  
ALTALINK 01-Apr-19 16:30 18-Apr-19 08:30 16.67 Days
Continuous
725L (Open Point 'A' - L674s) - GOI Component replacements 725L Str's Range 137-309  
ENMAX, ALTALINK 02-Apr-19 12:00 02-Apr-19 18:00 6 Hours
Continuous
36.3TR (ENMAX 36),36.1TR (ENMAX 36),7.84L (ENMAX 36 - ENMAX 7),7.84L. 36.81L. 36.1TR. 36.3TR. 36PT138-Z31. 7PT138-7.84,36.81L (44s Bearspaw - ENMAX 36) spring substation washing  
EPCOR 08-Apr-19 07:00 08-Apr-19 17:00 10 Hours
Continuous
CDDS14 @ Castledowns - 920L (71S - E57S) NIS Disconnect repair  
EPCOR 08-Apr-19 08:00 12-Apr-19 17:00 4.38 Days
Continuous
987s C2401 (987s Clover Bar),C2401 @ Cloverbar Breaker Maint  
ATCO 08-Apr-19 09:00 12-Apr-19 16:00 4.29 Days
Continuous
807s 902 (807s Sheerness),807s 902T (807s Sheerness),807S 902 807S Sheerness BREAKER MIN OIL HLR PARTIAL TESTING

Complete Partial PM on Breaker 902 at 807,807S Sheerness BREAKER MIN OIL HLR PARTIAL TESTING

Complete Partial PM on Breaker 902 at 807S,807S Sheerness BREAKER MIN OIL HLR PARTIAL TESTING

Complete Partial PM on Breaker 902 at 807S

 
ALTALINK 08-Apr-19 09:00 12-Apr-19 17:00 4.33 Days
Continuous
498s666 GOI (affecting 666L),666L (498s Tilley - 28s West Brooks),498s 666 (498s Tilley) 498s666 outage to replace 3 CT’s. Outage April 9-11 0900- 1630 continuous.  
BCH 08-Apr-19 09:00 12-Apr-19 17:00 4.33 Days
Continuous
5L52 (Ingledow - Custer) ING 5CB6 inspection and doble AB-BC
ATCO 08-Apr-19 09:00 17-Apr-19 13:00 9.17 Days
Continuous
7L20,7L20 (810s Dome Cutbank - 740s H.R.Milner) Changing over rated XARMS  
ALTALINK, EPCOR 08-Apr-19 10:00 11-Apr-19 16:00 3.25 Days
Continuous
1045L (310p-805s) Advice,1045L (310p Sundance - 320p Keephills - 805s Jasper) Migrate and commission all L6 – 1045L at 310P Sundance associated line protections, breakers, breaker fail and Tele-protection alarms, status, controls, metering and remote access to new RTU and LAN. Migrate and commission CVT-L6 alarms.  
ALTALINK 08-Apr-19 10:00 12-Apr-19 17:00 4.29 Days
Continuous
914L (87s Gaetz - 63s Red Deer),87s1652 GOI (914L) Replace 87s Gaetz - 914L/L12 A & B line protections. Affects 914L.  
ENMAX, ALTALINK 09-Apr-19 08:00 09-Apr-19 18:00 10 Hours
Continuous
20.82L (ENMAX 21 - ENMAX 20),21.80L. 20.82L. TAU CAP. 21.1TR. 21.4TR,21.80L (42s Sarcee - ENMAX 21),21.1TR (ENMAX 21),21.4TR (ENMAX 21) spring substation washing. Altalink required to pull CAP VOLT PT fuses  
SUNCOR 09-Apr-19 08:00 10-Apr-19 17:00 1.38 Days
Continuous
635PT-1001 (635EDD-1000) investigate and clean the oil leak  
ENMAX 11-Apr-19 08:00 11-Apr-19 18:00 10 Hours
Continuous
24PT138-Z31. 24.81L. 24.83L. 24B138-24BT3. 24.1TR Spring Substation Washing  
SUNCOR 11-Apr-19 08:00 12-Apr-19 17:00 1.38 Days
Continuous
635PT-1000 (635EDD-1000) Investigate transformer high temperature alarm  
BCH 11-Apr-19 09:00 18-May-19 17:00 37.33 Days
Continuous
5L71 (Mica Creek - Nicola) Placeholder for MCA Switchgear Roof Replacement. AB-BC
ENMAX, ALTALINK 14-Apr-19 08:00 22-Apr-19 18:00 8.42 Days
Continuous
7.82L (42s Sarcee - ENMAX 7),7.82L. ZPT138-Z32 P#1787. 7 sub transformer upgrade Phase 3. Line Protection Upgrade  
EPCOR 15-Apr-19 07:00 19-Apr-19 17:00 4.42 Days
Continuous
557s T1 (557s Castle Downs),TX1 @ Castledowns Doble / SFRA  
EPCOR 15-Apr-19 08:00 19-Apr-19 17:00 4.38 Days
Continuous
987s C2403 (987s Clover Bar),C2403 @ Cloverbar Breaker Maint  
BCH 15-Apr-19 09:00 03-May-19 17:00 18.33 Days
Continuous
5L71 (Mica Creek - Nicola) Spacer Replacement: 5L71 Outage AB-BC
ALTALINK 15-Apr-19 12:00 15-Apr-19 16:00 4 Hours
Daily
895s2219 - GOI Maintain 25kV vacuum breaker  
ATCO 16-Apr-19 09:00 16-Apr-19 13:00 4 Hours
Continuous
7L132,7L760,767S 700PT1 767S Oyen 700PT1 PCB oil sample required,
Also PM work on 701 Breaker & Hot Spot Repairs on 701A.
Oyen Area on 6L09 System for the duration of the work
 
ALTALINK 16-Apr-19 09:00 16-Apr-19 16:00 7 Hours
Daily
336s612 (612L) GOI,612L (336s Fincastle - 368s Burdett) Maintain 138kV SF6 gas breaker  
ALTALINK 18-Apr-19 07:30 18-Apr-19 15:30 8 Hours
Daily
725L (15s - L674s - I_240s) - GOI Closing Open Point 'A' @ Structure #103 and perform maintenance on 725BL54  
ALTALINK 18-Apr-19 08:00 18-Apr-19 14:00 6 Hours
Continuous
725BL (725BL54 - 240s McBride Lake),725L (15s Fort MacLeod - 725BL54) replace 138KV Breaker  
ALTALINK 18-Apr-19 08:00 18-Apr-19 16:00 8 Hours
Daily
725L (L674s-15s-I_240s) Advice to COL Install conductor between 674S1 and 674S3 and energize new 674S725W.  
EPCOR 22-Apr-19 08:00 26-Apr-19 17:00 4.38 Days
Continuous
C2404 @ Cloverbar,987s C2404 (987s Clover Bar) Breaker Maint  
ALTALINK 23-Apr-19 08:00 09-May-19 08:00 16 Days
Continuous
725L (L674s-L111s-618s) Open End - LETHB Replace 674S725E switch and supporting pad  
ALTALINK, Lethbridge 23-Apr-19 10:00 23-Apr-19 13:00 3 Hours
Continuous
725L (111s Coalbanks - 674s Lethbridge Bowron),725AL (618s Riverbend - 725L tap) replace 674S725E switch  
ALTALINK 23-Apr-19 12:00 03-May-19 18:00 10.25 Days
Continuous
725L (L674s - 618s - L111s) - GOI Component Replacements: (725AL Str's Range 1-13) and (725L Str's Range 310-367)  
ALTALINK, Lethbridge 23-Apr-19 13:00 09-May-19 08:00 15.79 Days
Continuous
725L (111s Coalbanks - 674s Lethbridge Bowron) replace 674S725E switch  
ALTALINK 25-Apr-19 08:30 29-Apr-19 17:30 4.38 Days
Continuous
20s 138kV South Bus & T1 Advice,150L (42 Sarcee - 20s Ghost Plant),20s T1 (20s Ghost),113L (20s Ghost - 33s Spray),859L (20s Ghost - T793s Horse Creek),20s Ghost 138 kV South Bus replace 20s149, 20s153s, T1 CT’s replace bus conductor and strain insulators  
EPCOR 29-Apr-19 08:00 03-May-19 17:00 4.38 Days
Continuous
803s L2401 (803s Lambton),L2401 @ Lambton breaker maintenance  
ALTALINK 29-Apr-19 08:30 01-May-19 17:30 2.38 Days
Continuous
113L(20s-33s) GOI,113L (20s Ghost - 33s Spray) finish work on 20s155s  
ATCO 29-Apr-19 09:00 01-May-19 16:30 2.31 Days
Continuous
715S 704,7L95,715s 704 (715s Leming Lake),7L95 (889s Mahkeses - 715s Leming Lake) Breaker Maintenance & tie in bus lockout logic

NOT SENT FOR STUDY
 
BCH 29-Apr-19 09:00 10-May-19 17:00 11.33 Days
Continuous
5L71 (Mica Creek - Nicola) Spacer Replacement: 5L71 Outage AB-BC
ENMAX 01-May-19 08:00 13-May-19 16:00 12.33 Days
Continuous
162s 240KV Bus. PT-Z42 Fall Substation Washing. Upgrade Protection on 2-GSU-XF-0002  
EPCOR 06-May-19 08:00 06-May-19 17:00 9 Hours
Continuous
12BU2 Zone @ Genesee,330P 12TC2 (330p Genesee),330p Genesee 500 kV Bus 2 doble  
EPCOR 06-May-19 08:00 10-May-19 17:00 4.38 Days
Continuous
L2402 @ Lambton,803s L2402 (803s Lambton) breaker maintenance  
ALTALINK 06-May-19 09:00 09-May-19 18:00 3.38 Days
Continuous
725L (L674s - 618s - L111s) - GOI Component Replacements: (725AL Str's Range 1-13) and (725L Str's Range 310-367)  
EPCOR 07-May-19 08:00 07-May-19 17:00 9 Hours
Continuous
330P Genesee 500 kV Bus 1,330P 12TC1 (330p Genesee),12BU1 zone @ Genesee doble  
EPCOR 08-May-19 08:00 08-May-19 17:00 9 Hours
Continuous
8L09 Zone @ Genesee Doble  
ALTALINK 09-May-19 08:00 09-May-19 14:00 6 Hours
Daily
725L (L674s-L111s-618s) Advice to COL Install conductor between 674S10 and 674S12 and energize new 674S725E switch  
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  
EPCOR 09-May-19 08:00 09-May-19 17:00 9 Hours
Continuous
1209 @ Genesee,330p 1209 (330p Genesee) doble  
EPCOR 10-May-19 08:00 10-May-19 17:00 9 Hours
Continuous
330p 1204 (330p Genesee),1204 @ Genesee doble  
EPCOR 13-May-19 07:00 21-May-19 17:00 8.42 Days
Continuous
330p 1202 (330p Genesee),330p 1203 (330p Genesee),12BU1 Outage @ 330P Genesee S/S relay maintenance  
ALTALINK 13-May-19 09:30 13-Jun-19 18:00 31.35 Days
Continuous
89s T2 (89s Ellerslie),89s T2(TX18727/28/33) GOI transformer maintenance: 240kV bushing leaks, Conservator Valve Leaks  
EPCOR 14-May-19 08:00 14-May-19 17:00 9 Hours
Continuous
L2405 @ Lambton,803s L2405 (803s Lambton) doble  
EPCOR 16-May-19 08:00 16-May-19 17:00 9 Hours
Continuous
1055L (816s Petrolia - 629s Argyll Transfer Station),1055L @ Petrolia Doble  
EPCOR, ALTALINK 17-May-19 08:00 17-May-19 17:00 9 Hours
Continuous
1044L @ Petrolia,1044L (805s Jasper - 816s Petrolia) Doble  
EPCOR 20-May-19 08:00 24-May-19 17:00 4.38 Days
Continuous
809 BKR @ Genesee - TIE TX2 NIS Breaker Maint  
ALTALINK 21-May-19 09:30 30-May-19 17:00 9.31 Days
Continuous
42s T1 (Tx18508) GOI,42s T1 (42s Sarcee) replace 42s40  
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  
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 27-May-19 08:00 31-May-19 17:00 4.38 Days
Continuous
330p 807 (330p Genesee),807 BKR @ Genesee breaker maintenance  
ALTALINK 29-May-19 08:00 29-May-19 16:30 8.5 Hours
Daily
33s 2 (33s Spray) maintain 138kV SF6 gas breaker  
ATCO 01-Jun-19 07:00 02-Jun-19 17:00 1.42 Days
Continuous
959s 900BS1,959s 901T (959s Lanfine),959s 901T Attach new bay for 9L172 to Oyen Wind Power  
ATCO 03-Jun-19 08:00 02-Aug-19 16:00 60.33 Days
Continuous
840S McNeill Station Protection Upgrade Project AB-SK
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
ATCO 06-Jun-19 07:00 07-Jun-19 17:00 1.42 Days
Continuous
766S 701,766S 901T RAS modifications for the Oyen Wind Power project  
EPCOR 10-Jun-19 08:00 21-Jun-19 17:00 11.38 Days
Continuous
330P 12TC2 (330p Genesee),TX2 @ Genesee DGA upgrade  
ATCO 16-Jun-19 07:00 17-Jun-19 17:00 1.42 Days
Continuous
767S 702,767s 702 (767s Oyen),7L760 (7L760D2 - 767s Oyen),7L760 RAS modifications for the Oyen Wind Power project  
EPCOR 24-Jun-19 07:00 12-Jul-19 17:00 18.42 Days
Continuous
CV5 (557s Castle Downs - 511s Victoria),CV5 @ Castledowns & Victoria CV5 Inspections  
EPCOR 24-Jun-19 07:00 26-Jul-19 17:00 32.42 Days
Continuous
240BA2 (814s Bellamy - 629s Argyll Transfer Station),240BA2 @ Bellamy & Argyll - 1056L NIS degas  
SUNCOR 01-Jul-19 08:00 21-Jul-19 18:00 20.42 Days
Continuous
29EDD-3 29Edd-3 maintenance  
SUNCOR 01-Jul-19 08:00 21-Jul-19 18:00 20.42 Days
Continuous
30EDD-2 5 year maintenance  
SUNCOR 01-Jul-19 08:00 28-Jul-19 18:00 27.42 Days
Continuous
29EDD-1 Millennium 5 year maintenance  
SUNCOR 01-Jul-19 09:00 21-Jul-19 18:00 20.38 Days
Continuous
30EDD-2 maintenance & testing on breaker  
EPCOR, ALTALINK 02-Jul-19 08:00 02-Jul-19 17:00 9 Hours
Continuous
920L W @ Castledowns & North Calder,920L (37s North Calder - 557s Castle Downs) doble  
EPCOR, ALTALINK 04-Jul-19 08:00 05-Jul-19 17:00 1.38 Days
Continuous
915L @ Cloverbar & East Edmonton,915L (38s East Edmonton - 987s Clover Bar) doble  
EPCOR, ALTALINK 08-Jul-19 08:00 09-Jul-19 17:00 1.38 Days
Continuous
947L (89s Ellerslie - 987s Clover Bar),947L @ Cloverbar & Ellerslie Doble  
ATCO 17-Jul-19 08:00 23-Jul-19 17:00 6.38 Days
Continuous
834S 902T,834s 902 (834s Wesley Creek),834s 903 (834s Wesley Creek),834s 902T (834s Wesley Creek) 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 705 (791s Rainbow Lake),7L29 (850s Rainbow Cogen - 791s Rainbow Lake) Test new RB4 protection  
SUNCOR 22-Jul-19 08:00 04-Aug-19 18:00 13.42 Days
Continuous
29EDD-1 Millennium 5 year maintenance  
EPCOR, ALTALINK 02-Aug-19 08:00 02-Aug-19 17:00 9 Hours
Continuous
1239L @ Genesee,1239L (510s Sunnybrook - 330p Genesee) Doble  
SUNCOR 12-Aug-19 08:00 08-Sep-19 18:00 27.42 Days
Continuous
30EDD-1 5 year 624T transformer maintenance and repair  
SUNCOR 16-Aug-19 08:00 29-Sep-19 18:00 44.42 Days
Continuous
29EDD-56 5 year maintenance  
ENMAX, ALTALINK 19-Aug-19 08:00 13-Sep-19 16:00 25.33 Days
Continuous
932L,932L (74s Janet - 162s Beddington) Line Protection Upgrade  
ATCO 28-Aug-19 07:00 02-Sep-19 17:00 5.42 Days
Continuous
766s 701 (766s Nevis),766s 901T (766s Nevis),766S 901T,766S 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
ATCO 13-Sep-19 07:00 18-Sep-19 17:00 5.42 Days
Continuous
767S 702,7L760,7L760 (7L760D2 - 767s Oyen),796s 702 (796s Nipisi) RAS modifications for the pattern Lanfine WAGF project  
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  
ATCO 19-Sep-19 08:00 05-Dec-19 16:00 77.38 Days
Continuous
740S 703T,740S 144Kv Main Bus Install new 703T and reconfigure main bus  
SUNCOR 30-Sep-19 08:00 03-Nov-19 18:00 34.46 Days
Continuous
29PL9-5 (29EDD-1 Millennium - 29EDD-34),29PL9-6 (29EDD-1 Millennium - 29EDD-34) 5 year maintenance  
ENMAX 07-Oct-19 08:00 25-Oct-19 16:00 18.33 Days
Continuous
24.83L Transmission Line Relocate  
ALTALINK 09-Oct-19 07:30 09-Oct-19 12:29 4.98 Hours
Daily
526s152 (7L129) GOI tank heater repair  
ALTALINK 09-Oct-19 12:30 09-Oct-19 17:30 5 Hours
Daily
526s252 (7L50) GOI tank heater repair  
ENMAX 11-Oct-19 08:00 27-Oct-19 18:00 16.42 Days
Continuous
25s. 1GSU GT1 HV SW MD maint SW133,  
ATCO 17-Oct-19 08:00 01-Nov-19 16:00 15.33 Days
Continuous
740s 701 (740s H.R. Milner),740s 701T (740s H.R.Milner),740S 701 replace breaker and re conductor switches  
ENMAX 02-Nov-19 08:00 30-Nov-19 18:00 28.46 Days
Continuous
25s. 2GSU GT2 HV SW MD maint SW138, SW139,  
ATCO 07-Nov-19 07:00 07-Nov-19 17:00 10 Hours
Continuous
9L93,9L93 (972s Tinchebray - 615s Halkirk) 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),918L line protection upgrade  
ATCO 05-Dec-19 08:00 19-Dec-19 16:00 14.33 Days
Continuous
740S 704,7L20 replace breaker and re conductor switches  
ATCO 07-Dec-19 07:00 12-Dec-19 17:00 5.42 Days
Continuous
Halkirk Wind Farm,9L93 Reroute OPGW test and commission.  
ATCO 07-Jan-20 08:00 27-Jan-20 17:00 20.38 Days
Continuous
834S 902T Three Creeks Project
Install the 240 kV switches
 
ATCO 13-Jan-20 08:00 17-Jan-20 17:00 4.38 Days
Continuous
7L131 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 Outage for Garden Plain Wind Project  
ATCO 20-Jan-20 08:00 24-Jan-20 17:00 4.38 Days
Continuous
7L106 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 Line Protection Upgrade  
ATCO 06-Mar-20 07:00 13-Mar-20 17:00 7.38 Days
Continuous
9L101 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 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  
SUNCOR 14-Sep-20 09:00 20-Sep-20 18:00 6.38 Days
Continuous
29PL9-2 (29EDD-1 Millennium - 848s Ruth Lake) maintenance on 29CTT-1 in 29EDD-1  
SUNCOR 14-Sep-20 09:00 20-Sep-20 18:00 6.38 Days
Continuous
29EDD-1 Millennium 5 and 10 year maintenance  
ATCO 22-Oct-20 07:00 27-Oct-20 17:00 5.42 Days
Continuous
7L77,7L65 7L65 Rebuild Project  
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,9L912,9L20 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: 2019-02-13   2:14:19 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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