Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2017-10-21

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.

Previous Version
Download CSV

Owner From To Duration Element Scheduled Activity Affected Intertie
ATCO 16-Mar-17 16:00 03-Nov-17 16:00 232 Days
Continuous
959S SVC (959s Lanfine) forced outage  
ENMAX 14-Aug-17 12:00 12-Nov-17 16:00 90.21 Days
Continuous
ENMAX 25 B240-D131 (ENMAX 25) SF6 sample, repair SW132 switch  
ALTALINK 11-Sep-17 23:00 27-Oct-17 17:00 45.75 Days
Daily
62s12 (62s Brazeau) maintenance  
ALTALINK 18-Sep-17 14:01 30-Nov-17 17:00 73.17 Days
Continuous
69s T4 (69s North Barrhead),69s 713 (69s North Barrhead) emergency tap changer repair  
ATCO 25-Sep-17 09:00 27-Oct-17 16:00 32.29 Days
Continuous
9L27 (863s Paintearth - 755s Cordel),9L948 (650s Hansman Lake - 863s Paintearth),863S Paintearth 240 kV switch replacement  
SUNCOR 03-Oct-17 08:00 23-Oct-17 18:00 20.42 Days
Continuous
29PT-341 (29EDD-34) project 1716 - Suncor Plant 300HV  
ATCO, ALTALINK 10-Oct-17 07:00 02-Nov-17 17:00 23.42 Days
Continuous
9L950 (132s Ware Junction - 801s Anderson),801s 911 (801s Anderson),801s 912 (801s Anderson),132s 950N (132s Ware Junction) protection upgrade  
ATCO 16-Oct-17 07:00 29-Oct-17 18:00 13.46 Days
Continuous
840S McNeill Station McNeill 2017 fall turn around, site shut down for maintenance work. AB-SK
ALTALINK 16-Oct-17 07:30 23-Oct-17 17:30 7.42 Days
Continuous
347s199W (199L) - GOI Replacing 347s199W with a new SF6 breaker and adding LA's to 199L  
ALTALINK, Lethbridge 16-Oct-17 08:00 26-Oct-17 16:00 10.33 Days
Continuous
725AL (618s Riverbend - 725L tap),725L (111s Coalbanks - 674s Lethbridge Bowron) relay upgrades  
Syncrude 19-Oct-17 07:00 28-Oct-17 20:00 9.54 Days
Continuous
ML1 (Syncrude Mildred Lake - D05 Syncrude),Mildred Lake 72kV Bus B (Sycrude Mildred Lake) Bus "B" Outage  
ALTALINK 21-Oct-17 08:00 22-Oct-17 18:00 1.42 Days
Daily
58s T2 & 25kV Bus - GOI Replace 25kV Risers Between the New breakers and the 25kV Bus & Install Bird Cover-up  
ENMAX 22-Oct-17 08:00 22-Oct-17 16:00 8 Hours
Continuous
162s 138KV Bus. 162.81L Fall Substation Washing (Original outage Oct 3rd)  
EPCOR 23-Oct-17 07:00 23-Oct-17 17:00 10 Hours
Continuous
1044L ( Jasper - Petrolia ) Doble  
EPCOR 23-Oct-17 07:00 27-Oct-17 17:00 4.42 Days
Continuous
TX1 @ Castledowns DGA Monitor  
ENMAX 23-Oct-17 08:00 23-Oct-17 18:00 10 Hours
Continuous
162s 240KV Bus. 918L Fall Substation Washing (Original outage Oct 2nd)  
ALTALINK 23-Oct-17 10:45 23-Oct-17 12:15 90 Mins
Daily
214s2047W Open breaker advice Remove TPR module which disables 2047 L protection  
ALTALINK 23-Oct-17 11:30 23-Oct-17 19:00 7.5 Hours
Daily
650s852 GOI 240kV Breaker Maintenance  
ALTALINK 23-Oct-17 12:00 26-Oct-17 18:00 3.25 Days
Continuous
61s T1 and 138kV Bus1 (affect 836L/202L) T1 bushing replacement  
ALTALINK 24-Oct-17 08:00 24-Oct-17 15:00 7 Hours
Daily
310p 240kV 'B' Bus,922L (310p-17s) GOI Replace insulators on 922L exiting structure in 310p  
ALTALINK 24-Oct-17 08:00 25-Oct-17 16:00 1.33 Days
Continuous
648s T3 (Tx18248) GOI Transformer Maintenance  
ALTALINK 24-Oct-17 15:00 02-Nov-17 17:15 9.09 Days
Continuous
922L (17s - 310p) GOI line maintenance  
ALTALINK 27-Oct-17 07:30 27-Oct-17 14:00 6.5 Hours
Daily
62s207 (T5) - GOI Wiring cutovers and trip tests from new T3 & T7 protections; Re-test block closing scheme on this breaker.  
EPCOR 28-Oct-17 07:00 28-Oct-17 17:00 10 Hours
Continuous
BA2 @ Bellamy Argyl Oil Samples  
ALTALINK 28-Oct-17 08:00 29-Oct-17 17:00 1.38 Days
Continuous
74s37.82W - GOI Maintain 138kV minimum oil breaker S&S HPF  
BCH 29-Oct-17 08:00 29-Oct-17 16:00 8 Hours
Continuous
5L77 (Revelstoke - Ashton Creek) black start testing - BC maintenance does not affect AB ATC AB-BC
ALTALINK 30-Oct-17 07:00 10-Nov-17 17:30 11.48 Days
Continuous
17s (1081L - 281s) - GOI 17s6 Breaker C60 Relay Replacement & PMU Replacement & Airbreak Module Replacement  
ALTALINK 30-Oct-17 07:30 02-Nov-17 17:30 3.42 Days
Continuous
950L(132s - A801s) - GOI Replacing 'A' & 'B' line protections  
BCH 30-Oct-17 09:00 03-Nov-17 13:00 4.17 Days
Continuous
2L112 (Nelway - Boundary) gas relay and protection maintenance - BC maintenance does not affect AB ATC AB-BC
ALTALINK 30-Oct-17 11:00 16-Nov-17 14:00 17.17 Days
Continuous
163s1752 - GOI Replace 163s1752 Breaker To New SF6 Type  
ALTALINK 31-Oct-17 08:00 10-Nov-17 17:00 10.42 Days
Continuous
240kV Busses & 910L GOI [SW,289s T1,T2 [SWEATD] Cut 910L in/out of new 289s, add new 1140L to 89s, connect T1/T2 to 240kV bus. Close OP 'JJ', 'GG', 'EE', 'MM'  
ALTALINK 01-Nov-17 07:00 22-Dec-17 17:00 51.46 Days
Continuous
916L (42s-5s) GOI [SWCRR] [SWCRR] 916L to move U/G for a portion, connect new U/G cables at both ends  
ALTALINK 01-Nov-17 07:00 22-Dec-17 17:00 51.46 Days
Continuous
693L (42s-C10s) GOI [SWCRR] [SWCRR] 693L to move U/G for a portion, connect new U/G cables at both ends  
ENMAX 01-Nov-17 08:00 12-Nov-17 16:00 11.38 Days
Continuous
37.82L. 37s & Janet 138KV Bus Differential Protection Line Protection Upgrade  
ALTALINK 01-Nov-17 23:00 02-Nov-17 02:00 3 Hours
Continuous
62s11 (62s Brazeau) maintenance  
ALTALINK 02-Nov-17 02:00 07-Nov-17 00:00 4.96 Days
Daily
62s12 (62s Brazeau) maintenance  
ENMAX 02-Nov-17 08:00 02-Nov-17 16:00 8 Hours
Continuous
693L. 10B138-693L SF6 Gas Sample.  
ATCO 03-Nov-17 07:00 04-Dec-17 17:00 31.46 Days
Continuous
9L99,9L97,9L933 Protection upgrade  
EPCOR 03-Nov-17 19:00 05-Nov-17 19:00 2.04 Days
Continuous
CDS2,GDS1B1,GDS1B2 @Cloverbar disconnect replacement  
ALTALINK 05-Nov-17 21:15 06-Nov-17 00:45 3.5 Hours
Continuous
693L (42s - C10s) - GOI for HLM high load move  
ALTALINK 06-Nov-17 09:30 08-Nov-17 16:00 2.27 Days
Continuous
28s T1 & 240kv Bus 1 - Advice Replace 1 PT at 28s19 (Like For Like)  
ALTALINK 06-Nov-17 11:00 07-Nov-17 17:00 30 Hours
Continuous
320p152 GOI Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time.  
SUNCOR 07-Nov-17 08:30 09-Nov-17 18:00 2.4 Days
Continuous
29EDD-94 952_9701 (29EDD-94) repair leaking gasket on SF-6 breaker  
ALTALINK 07-Nov-17 09:00 08-Nov-17 16:00 31 Hours
Continuous
511s SVC Plus & T30 - GOI Update CIP passwords on Valve Cooling Software.  
ALTALINK 07-Nov-17 13:00 07-Nov-17 17:00 4 Hours
Daily
953L (755s - 574s) De-energize 953L needs to be de-energized as part of the 9404R Bonlea - 9933R ATCO Strome radio replacement  
ENMAX 07-Nov-17 14:00 12-Nov-17 15:00 5.04 Days
Continuous
1GSU. 25B240-D132. 25B240-D131 Repair SW.132  
ALTALINK 08-Nov-17 07:00 09-Nov-17 17:00 1.42 Days
Continuous
320p752 GOI Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time.  
ALTALINK 08-Nov-17 08:00 08-Nov-17 17:00 9 Hours
Daily
74s103 Advice C phase mech local/remote switch does not work. Will operate remotely in either position. Needs to be re-wired.  
ALTALINK 08-Nov-17 13:00 08-Nov-17 17:00 4 Hours
Daily
38s17 (s18 Breaker) Advice Trip test for 138kV Bus 3 B87 relay addition  
EPCOR 09-Nov-17 07:00 10-Nov-17 17:00 1.42 Days
Continuous
Tx2 Outage @ 803S Lambton S/S Cutover of new relay protection  
ALTALINK 10-Nov-17 17:00 13-Nov-17 08:00 2.63 Days
Continuous
240kV Bus 2 GOI [SWEATD],289s T2 [SWEATD] Keep 289s T2 & 240kV bus under GOI until 914L cut-in and energization Nov 9-15  
EPCOR 11-Nov-17 07:00 13-Nov-17 17:00 2.42 Days
Continuous
Tx1 Outage @ 803S Lambton S/S Cutover of new relay protection  
ALTALINK 12-Nov-17 08:00 12-Nov-17 12:00 4 Hours
Daily
38s17 (18 Breaker) Advice Trip test for 138kV Bus 2 B87 relay addition  
ALTALINK 13-Nov-17 06:30 16-Nov-17 17:00 3.44 Days
Continuous
74s (925L-63s) – Advice 74s49 PT Replacement  
ALTALINK 13-Nov-17 07:00 13-Nov-17 12:00 5 Hours
Daily
17s13 - GOI Required Trip Test for Protection Upgrade  
EPCOR 13-Nov-17 07:00 17-Nov-17 17:00 4.42 Days
Continuous
CDS25 @ Cloverbar disconnect replacement  
ALTALINK 13-Nov-17 08:00 23-Nov-17 17:00 10.38 Days
Continuous
240kV Bus 2 & 914L (89s-86s) GO,289s T2 [SWEATD] Cut 914L in/out of 289s, add new 1112L  
ALTALINK 13-Nov-17 09:00 13-Nov-17 16:00 7 Hours
Daily
863L(863L162A-225s-226s) - GOI 891L1 airbreak adjustment in conjunction with MPLS work.  
ATCO 13-Nov-17 12:00 16-Nov-17 17:00 3.21 Days
Continuous
7L75 CT ratio and settings changes required to upgrade line limits.  
ALTALINK 13-Nov-17 12:30 13-Nov-17 17:30 5 Hours
Daily
17s4 - GOI Required Trip Test for Protection Upgrade  
ALTALINK 14-Nov-17 07:00 14-Nov-17 12:00 5 Hours
Daily
17s9 - GOI Required Trip Test for Protection Upgrade & PMU Replacement  
ATCO, ALTALINK 14-Nov-17 07:00 17-Nov-17 18:00 3.46 Days
Continuous
9L912 (766s Nevis - 63s Red Deer),912L (63s Red Deer - 766s Nevis) Upgrade 9L912 protection. Altalink to upgrade their end at the same time.  
ALTALINK 14-Nov-17 07:00 05-Dec-17 18:00 21.46 Days
Continuous
1043L (320p-E816s) GOI [SWEATD] [SWEATD] Cut in 1043L/1139L to Harry Smith Substation 367s. 320p SCADA work (Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time)  
ALTALINK 14-Nov-17 12:30 14-Nov-17 17:30 5 Hours
Daily
17s2 - GOI Required Trip Test for Protection Upgrade & PMU Replacement  
ALTALINK 15-Nov-17 07:00 15-Nov-17 12:00 5 Hours
Daily
17s1652 - GOI Required Trip Test for Protection Upgrade  
BCH 15-Nov-17 09:00 15-Nov-17 17:00 8 Hours
Continuous
2L293 (Selkirk - Nelway) BCH - annual maintenance - BC maintenance does not affect AB ATC AB-BC
ALTALINK 15-Nov-17 12:30 15-Nov-17 17:30 5 Hours
Daily
17s85 (T2 TX18477) - GOI Required Trip Test for Protection Upgrade  
ALTALINK 16-Nov-17 07:00 16-Nov-17 12:00 5 Hours
Daily
17s16 (C1) - GOI Required Trip Test for Protection Upgrade  
ALTALINK 16-Nov-17 14:30 16-Nov-17 15:00 30 Mins
Daily
163s1752 & (1002L-275s) open - Advice 1002L Required to commission New 163s1752 Breaker  
ATCO 17-Nov-17 07:00 20-Nov-17 17:30 3.44 Days
Continuous
9L01 9L01 Install piles for new structures for Thickwood tap.  
ENMAX 18-Nov-17 08:00 18-Nov-17 16:00 8 Hours
Continuous
25B240-D133 SF6 Gas sample  
ALTALINK, Lethbridge 20-Nov-17 08:00 30-Nov-17 16:00 10.33 Days
Continuous
207L (111s Coalbanks - 370s North Lethbridge) relay upgrades  
ENMAX 20-Nov-17 08:00 04-Dec-17 16:00 14.33 Days
Continuous
35.81L(temporary) (SWCRR)-Energization only. New 35.81 settings into 35 Sub. Connect new/permanent 35.81L to 42 S and 35 sub  
EPCOR 27-Nov-17 07:00 27-Nov-17 17:00 10 Hours
Continuous
Tx2 Outage @ 803S Lambton S/S Cutover of new relay protection  
ALTALINK 27-Nov-17 07:30 30-Nov-17 17:30 3.42 Days
Continuous
933L(132s - A801s) - GOI Replacing 'A' & 'B' line protections  
ALTALINK 27-Nov-17 08:00 28-Nov-17 15:00 31 Hours
Continuous
28s T2(TX18775) - GOI Emergency work: Maintain and Doble transformer  
ENMAX 27-Nov-17 08:00 28-Nov-17 16:00 1.33 Days
Continuous
7.84L. 36.81L. 36.1TR. 36.3TR HV SW/MD Maintenance 36.1MD, SW88, SW89, SW90. Fall Substation Washing  
ENMAX 27-Nov-17 08:00 01-Dec-17 16:00 4.33 Days
Continuous
162.1TR Commision new equipment for 162.3TR addition  
ALTALINK 27-Nov-17 09:30 30-Nov-17 17:00 3.31 Days
Continuous
138kV and 240kV West Bus - GOI,77s T1 Protection upgrade  
ALTALINK 28-Nov-17 06:30 29-Nov-17 19:00 1.52 Days
Continuous
675L (244s-321s) GOI Eye nut changeout - 675L should be cut into 321s by the time this outage proceeds  
ENMAX 28-Nov-17 08:00 28-Nov-17 16:00 8 Hours
Continuous
162B240-RB131. 162B240-RB134. PT Z43 Commision new equipment for 162.3TR addition  
ATCO 28-Nov-17 08:00 01-Dec-17 17:00 3.38 Days
Continuous
9L29 OPGW Repair  
ALTALINK 29-Nov-17 07:00 29-Nov-17 17:00 10 Hours
Daily
320p400 GOI Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time.  
ALTALINK 29-Nov-17 07:00 30-Nov-17 18:00 1.46 Days
Continuous
320p T1 (Tx18429) & 240kV 'B' Bus Advice [SWEATD] Trip test 320p91, 320p1352, 320p752 & 320p2152 from new 320p352 breaker fail  
ALTALINK 30-Nov-17 06:30 11-Dec-17 19:30 11.54 Days
Continuous
676L(244s-523s) GOI eye nut changeout  
ENMAX 02-Dec-17 08:00 03-Dec-17 16:00 1.33 Days
Continuous
162.2TR DGA sampling required  
ATCO 04-Dec-17 07:00 05-Dec-17 17:00 1.42 Days
Continuous
6L57 Reroute line  
ALTALINK 04-Dec-17 07:00 08-Dec-17 17:00 4.42 Days
Continuous
17s4 - GOI 17s4 C60 Relay Installation & PMU Replacement  
ATCO 04-Dec-17 07:00 11-Dec-17 17:00 7.42 Days
Continuous
801S 900 BUS 2 240kV bus # 2 OOS for Construction - Protection upgrade, Breaker and a third bus configuration at 801s will be open at one end  
ATCO 04-Dec-17 07:00 15-Dec-17 17:30 11.44 Days
Continuous
7L129 Installing line PT and CT ratio changes and breaker fail  
ENMAX 04-Dec-17 08:00 05-Dec-17 16:00 1.33 Days
Continuous
65.1TR DGA sample required  
ALTALINK 04-Dec-17 09:15 08-Dec-17 17:45 4.35 Days
Continuous
1034L (244s - 324s) - GOI damper/insulator maintenance  
ALTALINK 04-Dec-17 09:30 07-Dec-17 17:00 3.31 Days
Continuous
138kV and 240kV East Bus - GOI,77s T2 Protection upgrade  
ENMAX 06-Dec-17 08:00 07-Dec-17 16:00 1.33 Days
Continuous
65.2TR DGA sample required  
ALTALINK 07-Dec-17 08:00 07-Dec-17 13:00 5 Hours
Daily
17s3 - GOI Required Trip Test for Protection Upgrade  
ALTALINK 11-Dec-17 08:00 11-Dec-17 16:00 8 Hours
Daily
17s12 - GOI Required For PMU Replacement  
ALTALINK 11-Dec-17 09:15 15-Dec-17 17:45 4.35 Days
Continuous
1035L (244s - A2075s) - GOI damper/insulator maintenance  
ALTALINK 12-Dec-17 08:00 12-Dec-17 16:00 8 Hours
Daily
17s8 - GOI Required For PMU Replacement  
ENMAX 08-Jan-18 08:00 19-Jan-18 16:00 11.33 Days
Continuous
28.80L. 28s & Sarcee 138KV Bus Differential Protection Line Protection Upgrade  
ALTALINK 08-Jan-18 11:00 11-Jan-18 17:00 3.25 Days
Continuous
1203L (320p - 510s) GOI Migrate controls, annunciation and analogs to new RTU. Redundant protections will be taken out of service one at a time.  
ATCO 15-Jan-18 07:00 18-Jan-18 12:00 3.21 Days
Continuous
801S 910 Protection upgrade  
ATCO 15-Jan-18 07:00 22-Jan-18 17:00 7.42 Days
Continuous
801S 9L100D1 Protection upgrade testing and commissioning  
ATCO 15-Jan-18 07:00 27-Jan-18 17:00 12.42 Days
Continuous
9L70 Protection upgrade

FS
Switching to isolate 9L70. Isolation points to be 903A, 904A, and 9L70D2 @ 946S Oakland
PSE crew
Complete control wiring for 903B, 904B, 9L70D1
Continue prep work for future outages
Commissioning
Commission control for 903B, 904B, 9L70D1
End to end tests with TOC
ASE
Telecontrol programming
 
ALTALINK 16-Jan-18 06:30 23-Jan-18 18:00 7.48 Days
Continuous
880L (523s-321s) GOI Protection setting changes and checks  
ATCO 16-Jan-18 07:00 25-Jan-18 17:00 9.42 Days
Continuous
7L66,717S 702 Attach new switch 704A, 144 KV bus PT's and new transformer bay.  
BCH 16-Jan-18 09:00 16-Jan-18 17:00 8 Hours
Continuous
1L274 (Line Creek - Elkford) 2018 annual plan work AB-BC
BCH 17-Jan-18 09:00 26-Jan-18 17:00 9.33 Days
Continuous
1L274 (Britt Creek - 1D4L274) 2018 annual plan work AB-BC
ATCO 19-Jan-18 07:00 22-Jan-18 17:00 3.42 Days
Continuous
801S 911 Protection upgrade  
ALTALINK 25-Jan-18 06:00 28-Jan-18 17:00 3.46 Days
Continuous
41s station,880L(523s-41s) Advice Install 880L bypass, cut free 41s  
ALTALINK 25-Jan-18 07:30 30-Jan-18 18:00 5.44 Days
Continuous
675L (244s-41s-321s) GOI Cutfree 675L from 41s & Cut in 675L at 321s Al Rothbauer  
ATCO 30-Jan-18 07:00 01-Feb-18 17:30 2.44 Days
Continuous
9L46 Attach new Sharp Hills wind farm in/out connection.  
ENMAX 01-Feb-18 08:00 01-Feb-18 16:00 8 Hours
Continuous
832L. 10.1TR HV SW MD maint MD-10.1TR.  
ATCO 02-Feb-18 07:00 09-Feb-18 17:30 7.44 Days
Continuous
9L07 Install 9L07 cut in structures for new 951S Thickwood Hills substation.  
ALTALINK 03-Feb-18 06:30 07-Feb-18 18:00 4.48 Days
Continuous
880L/892L (41s-321s) GOI rename 892L to 880L, connect to 321s.  
ENMAX 03-Feb-18 08:00 03-Feb-18 16:00 8 Hours
Continuous
162.81L HV SW MD maint MD-162.81, SW82, SW83  
ATCO 09-Feb-18 07:00 11-Feb-18 17:30 2.44 Days
Continuous
9L07-1 String new portion 9L01/9L30 over 9L07 for new 951S Thickwood Hills substation.  
ALTALINK 20-Feb-18 08:00 20-Feb-18 12:00 4 Hours
Daily
74s 240kV Bus 1 & 932L/929L – GOI Create Open Point ‘A’ On Sheet one on 240kV Bus 1 between 74s48 and Sheet 2  
BCH 20-Feb-18 08:00 02-Mar-18 16:00 10.33 Days
Continuous
1L274 (48s Pocaterra - Britt Creek) 2018 annual plan work AB-BC
ALTALINK 20-Feb-18 12:30 08-Mar-18 12:30 16 Days
Continuous
74s T1 932L/929L – Advice 74s352, 74s552 CT Replacements, 74s92, 74s94 Pt Replacements  
ATCO 27-Feb-18 07:00 04-Mar-18 18:00 5.46 Days
Continuous
7L22 Build junction for new in and out POD 2030S Hughes  
ATCO 07-Mar-18 07:00 16-Mar-18 17:30 9.4 Days
Daily
9L01 9L01 Cut in for in and out addition of 951S Thickwood Hills substation. Install new structures.  
ALTALINK 08-Mar-18 13:00 08-Mar-18 17:00 4 Hours
Daily
74s 240kV Bus 1 & 932L/929L – GOI Close Open Point ‘A’ On Sheet one on 240kV Bus 1 between 74s48 and Sheet 2  
BCH 10-Sep-18 09:00 14-Sep-18 16:00 4.29 Days
Continuous
1L274 (B1s BCH Natal - 1D1L274) 2018 annual plan work AB-BC
ATCO 10-Sep-18 09:00 14-Sep-18 17:00 4.33 Days
Continuous
801S 901T 801S Anderson 901T Re-test Sept 10, 2018  
ATCO 08-Jan-19 07:00 11-Jan-19 17:30 3.44 Days
Continuous
9L01 9L01 Cut in for in and out addition of 951S Thickwood Hills substation. Remove bypass at substation.  
ATCO 15-Jan-19 07:00 18-Jan-19 17:30 3.44 Days
Continuous
9L07 Cut in 951S Thickwood Hills substation.  

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: 2017-10-11   4:09:37 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.

© 2009 Alberta Electric System Operator. All rights reserved