Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2016-10-08

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
ENBRIDGE 26-Jun-13 08:00 31-Dec-16 17:00 1,284.42 Days
Continuous
Hay Lake North Series Capacitor,Marias South Series Capacitor Series capacitor banks were removed from service due to the Subsynchronous Control Interaction (SSCI) with connected wind farm. AB-MATL
ALTALINK 18-Aug-16 17:01 10-Oct-16 18:15 53.05 Days
Continuous
688L (199s East Airdrie - 688DL23) line rebuild  
ENMAX, ALTALINK 12-Sep-16 08:00 09-Oct-16 12:00 27.17 Days
Continuous
28.80L (42s Sarcee - ENMAX 28) (SWCRR)-Allteck 28.80 OOS #1 Aug 16 – 23rd for Cable pulling and training / racking. Relay settings and testing required. Altalink required to install an remove grounds on bottom of line side switches at 42s for Valard  
ATCO 12-Sep-16 09:00 30-Dec-16 13:00 109.21 Days
Continuous
791s 456 (791s Rainbow Lake),791s 462 (791s Rainbow Lake) ATCO Power work  
ALTALINK 19-Sep-16 09:30 28-Oct-16 17:30 39.33 Days
Continuous
777L (245s Seebe - 48s Pocaterra) line maintenance AB-BC
SHELL, ALBIAN 27-Sep-16 07:00 10-Oct-16 17:30 13.44 Days
Continuous
847s 901 (847s Muskeg River),847s 903 (847s Muskeg River),847s 904 (847s Muskeg River),919s 907 (919s Hartley),919s 908 (919s Hartley) protection upgrade  
ALTALINK 03-Oct-16 05:30 14-Oct-16 17:30 11.5 Days
Continuous
1034L (244s Bowmanton - 324s Cassils) damper replacements  
ALTALINK 03-Oct-16 07:30 14-Oct-16 17:30 11.42 Days
Continuous
994L (103s Goose Lake - 312s Fidler) damper replacements  
SUNCOR 03-Oct-16 08:00 10-Oct-16 20:00 7.5 Days
Continuous
29PL9-17 (29EDD-1 Millennium - 29EDD-94 Voyageur) maintenance  
ATCO 03-Oct-16 08:00 19-Oct-16 18:00 16.42 Days
Continuous
797S 701T,7L62,Kemp River,797S Station Service replace 7L62D4 structure and switch  
ATCO 06-Oct-16 07:00 17-Oct-16 17:30 11.44 Days
Continuous
7L20 (845s Big Mountain - 810s Dome Cutbank) Thornton project, salvage structures/conductor on 7L20, erect new switch and structures, tie into 7L20 and commission  
ATCO 08-Oct-16 08:00 09-Oct-16 16:00 1.33 Days
Continuous
919S 908 Test new logic from 847S Muskeg  
ENMAX 10-Oct-16 08:00 16-Oct-16 16:00 6.33 Days
Continuous
65.1TR. 65s 138KV South Bus (FATDSC)-Installation of 54.81L receiving structure.  
SUNCOR 10-Oct-16 09:00 11-Oct-16 17:00 1.33 Days
Continuous
505s 635pT_1000 (505s Fort Hills) check PRD switch on transformer 635PT-1000 and replace it if required  
ATCO 11-Oct-16 07:00 21-Oct-16 17:30 10.44 Days
Continuous
2075S 1300PT1 Station outage, EATL will be unavailable for transfer. Siemens to provide new dividers to replace existing in service devices.  
ATCO 11-Oct-16 07:00 21-Oct-16 17:30 10.44 Days
Continuous
2029S 1300PT1 Station outage, EATL will be unavailable for transfer. Siemens to provide new dividers to replace existing in service devices.  
ATCO 11-Oct-16 07:00 26-Oct-16 17:30 15.44 Days
Continuous
847S 901T,847S 902,919S 900 BUS 1,919S 905,847S 903 Disconnect and remove 903 optical CT's
Install new 903CT
Remove cabling, install new and terminate Bkr 903
Remove cabling, install new and terminate 903PT
Complete cable install and terminate 903CT poles
Reconnect bus
Commission protection and control - Logic, Telecontrol, Telecom
 
ALTALINK 11-Oct-16 07:30 11-Oct-16 17:30 10 Hours
Daily
688DL23 (688L) - Open AirBreak Advice close open point 'A' on 688L (str15), 284s to remain online  
ENMAX 11-Oct-16 08:00 20-Oct-16 16:00 9.33 Days
Continuous
21.80L SWCRR - cable pulling  
SUNCOR 11-Oct-16 08:00 28-Oct-16 20:00 17.5 Days
Continuous
29EDD-1 29EDD1s 752 (29EDD-1 Millennium),29EDD-1 29EDD1s 552 (29EDD-1 Millennium),29EDD-1 29EDD1s 152 (29EDD-1 Millennium),29EDD-1 29EDD1s 252 (29EDD-1 Millennium),29EDD-1 29EDD1s 352 (29EDD-1 Millennium) rebuild dashpots  
BCH 11-Oct-16 09:00 14-Oct-16 17:00 3.33 Days
Continuous
5L96 (Selkirk - Vaseux Lake) insulator replacement and arcing horn installations - BC maintenance does not affect AB ATC AB-BC
ALTALINK 11-Oct-16 09:30 14-Oct-16 17:30 3.33 Days
Continuous
910L (89s-288s) GOI Component replacement  
ALTALINK 11-Oct-16 11:30 12-Oct-16 17:30 30 Hours
Continuous
796L (796L28s-282s) GOI 796L span 216-217 OPGW has been damaged and needs to be replaced for one span  
ALTALINK 11-Oct-16 11:30 13-Oct-16 17:30 2.25 Days
Continuous
74s77,T2 (TX18571) - GOI 138kV breaker maintenance  
ALTALINK 12-Oct-16 07:00 14-Oct-16 09:00 2.08 Days
Continuous
310p69 & TX 18153 (T30) GOI Replace breaker 310p69. Associated redundant protection will be taken out of service one at a time to allow work on the CT circuits. 234L1 will be closed to supply the 69 kV loads at 310p, 867s & 821s from 19s Wabamun.  
ALTALINK 12-Oct-16 07:45 12-Oct-16 14:45 7 Hours
Daily
72s T1(TX18404) - GOI Replace broken stand off insulators on LA's  
ATCO 13-Oct-16 06:30 27-Oct-16 16:00 14.4 Days
Continuous
919S 906 Shell Albian Sands request  
ALTALINK 13-Oct-16 08:00 13-Oct-16 13:00 5 Hours
Daily
108s352 - GOI Tighten all hardware on breaker.  
ALTALINK 13-Oct-16 08:30 13-Oct-16 12:30 4 Hours
Daily
410s T1(TX18134) - GOI Repair IDD bushing connector on H2  
ALTALINK 13-Oct-16 13:01 13-Oct-16 17:30 4.48 Hours
Daily
108s452 - GOI Tighten all hardware on breaker.  
ATCO 14-Oct-16 07:00 19-Oct-16 17:00 5.42 Days
Continuous
7L574,822S 702,822S 703,7L86 Install new bus PT's to upgrade sub to new standards for split bus configuration  
ENMAX 14-Oct-16 08:00 14-Oct-16 16:00 8 Hours
Continuous
3GSU-XF-001. 25B240-D141. 25B240-D140 MD maintenance on 25MD240-3GSU  
ALTALINK 14-Oct-16 12:00 17-Oct-16 14:00 3.08 Days
Continuous
681s T1 GOI Retest paralleling scheme, transformers will be switched out of service 1 at a time. The transformers will also be switched into service 1 at time. (No line outages).  
ALTALINK 14-Oct-16 12:00 17-Oct-16 14:00 3.08 Days
Continuous
681s T2 GOI Retest paralleling scheme, transformers will be switch out of service 1 at a time. The transformers will also be switched into service 1 at time. (No line outages).  
ENMAX 15-Oct-16 07:00 15-Oct-16 10:00 3 Hours
Continuous
162s 240KV Bus. 918L Fall Substation Washing  
ENMAX 15-Oct-16 08:00 15-Oct-16 14:00 6 Hours
Continuous
162s 138KV & 240KV Bus. 162.1TR Fall Substation Washing  
ENMAX 15-Oct-16 14:00 15-Oct-16 16:00 2 Hours
Continuous
162s 138KV Bus. 162.4TR Fall Substation Washing  
ENMAX 16-Oct-16 07:00 16-Oct-16 10:00 3 Hours
Continuous
162s 240KV Bus. 932L Fall Substation Washing  
ATCO 16-Oct-16 07:00 28-Oct-16 17:30 12.44 Days
Continuous
791S 400 BUS B,791S 400PT8,791S 400 BUS T2,791S 411T,791S 409T,791S 400PT9,791S 459PT,791S 401T Disconnect existing and reconnect new protection/control/metering cabling  
ENMAX 16-Oct-16 08:00 16-Oct-16 12:00 4 Hours
Continuous
162s 138KV & 240KV Bus. 162.2TR Fall Substation Washing  
ENMAX 16-Oct-16 12:00 16-Oct-16 14:00 2 Hours
Continuous
162s 138KV Bus. 11.83L Fall Substation Washing  
ENMAX 16-Oct-16 14:00 16-Oct-16 16:00 2 Hours
Continuous
162s 138KV Bus. 162.81L Fall Substation Washing  
EPCOR 17-Oct-16 06:00 21-Oct-16 17:00 4.46 Days
Continuous
TX3 @ Jasper ETM install  
EPCOR 17-Oct-16 06:00 21-Oct-16 17:00 4.46 Days
Continuous
1058L Lambton - Summerside Line Maint  
ALTALINK 17-Oct-16 06:30 20-Nov-16 18:30 34.54 Days
Daily
7L50 & 704L - ATCO Advice Climbing inspection and replacing cross arms on 7L50  
ATCO 17-Oct-16 07:00 20-Oct-16 17:00 3.42 Days
Continuous
7L23 Line mitigation  
ATCO 17-Oct-16 07:00 20-Oct-16 17:00 3.42 Days
Continuous
2075S 902T,2075S ACF21 Online Pump Addition/Cold Start Upgrade
SVC1 will remain in service while SVC2 is out of service.
This will provide no restrictions to the DC or AC system while it is out of service.
 
EPCOR 17-Oct-16 07:00 21-Oct-16 17:00 4.42 Days
Continuous
C2406 @ Cloverbar Breaker Maint  
ATCO 17-Oct-16 07:00 20-Nov-16 18:00 34.5 Days
Daily
7L50 Climbing Inspection and replace rotten cross arms.
the line will be released daily
line will also be subject to real time evaluation too.
 
ALTALINK 17-Oct-16 07:30 27-Oct-16 17:30 10.42 Days
Continuous
1035L (244s - A2075s) - GOI Damper Replacements  
ALTALINK 17-Oct-16 07:30 28-Oct-16 17:30 11.42 Days
Continuous
1071L (312s - 205s) - GOI Damper Replacements  
ATCO 17-Oct-16 08:00 21-Oct-16 15:00 4.29 Days
Continuous
834S 902T tapchanger vibro-acoustic measurements  
ENMAX 17-Oct-16 08:00 28-Oct-16 16:00 11.33 Days
Continuous
24.81L. 24.83L. 24B138-24BT3. 24.1TR. 24PT138-Z31. 24s 138KV Bus Differential. 24s Auto Switching Remove temp jumpers across 24BT3and reinstall breaker. Protection settings changes.  
ENMAX 17-Oct-16 08:00 18-Dec-16 16:00 62.38 Days
Continuous
65s 138KV South Bus. 65B138-D84 (FATDSC)-Install 65MD138-54.81, SW 89, 65B138-D83.  
BCH 17-Oct-16 09:00 19-Oct-16 17:00 2.33 Days
Continuous
5L91 (Selkirk - Ashton Creek) ACK 5D1CB4, 5D2CB3, 5D44 Inspections.
FLAR wiring for ACK 5CVT3
AB-BC
ALTALINK 17-Oct-16 09:15 18-Oct-16 17:45 1.35 Days
Continuous
244s2389 - GOI Crew to repair 240kV switch  
ALTALINK 17-Oct-16 11:30 20-Oct-16 14:30 3.13 Days
Continuous
89s952 & 89s1052 (910L) GOI Urgent outage to replace failed 910L A Protection.  
ALTALINK 17-Oct-16 13:00 17-Oct-16 16:00 3 Hours
Daily
320p2152 - GOI Gas top up  
ALTALINK 18-Oct-16 07:30 20-Oct-16 17:30 2.42 Days
Continuous
74s2152 - GOI 240kV breaker maintenance  
ALTALINK 18-Oct-16 08:30 18-Oct-16 12:30 4 Hours
Daily
108s252 - GOI Replace faulty gas density gauge  
ALTALINK 18-Oct-16 09:30 21-Oct-16 17:30 3.33 Days
Continuous
910L (89s-288s) GOI Component replacement  
ALTALINK 18-Oct-16 10:00 18-Oct-16 12:00 2 Hours
Daily
719L TPR - Relay 9448R radio tower cut over which will affect 719L TPR circuits 'A' & 'B' for 2 hours during the outage.  
ALTALINK 18-Oct-16 10:00 18-Oct-16 12:00 2 Hours
Daily
1201L ILRAS - Relay 9448R radio tower cut over which will affect 1201L ILRAS for 2 hours during the outage, ILRAS comm interruption will not trip 1201L.  
ALTALINK 19-Oct-16 07:30 21-Oct-16 17:30 2.42 Days
Continuous
913L (69s-A732s) GOI Replace insulators and perform maintenance  
ATCO 19-Oct-16 12:01 30-Oct-16 18:00 11.25 Days
Continuous
Kemp River,797S 701T,797S Station Service,7L62 (2) Construction (Replace 7L62D3, 4160 metering tank, repair clearance issues in the 4160 bay, upgrade protection), see attached work sequence

Oct 19 PM - Oct 30 2-33799A - 7L62 will feed 750s from 905s, 7L62 OOS 789s to 797s, 797s Sub outage.
Oct 30 AM - 2-33799B - 7L62 OOS 789s to 905s
 
ALTALINK 20-Oct-16 08:00 20-Oct-16 17:30 9.5 Hours
Daily
268s503 (503L and I_323s) & 268s24 - GOI 69kV Breaker mtce & 268s24 switch maintenance, cusotmer to perform maintenance on their I_323s S1 switch.  
ATCO 20-Oct-16 08:00 21-Oct-16 16:00 1.33 Days
Continuous
919S 906 To test new logic from 847S Muskeg to 906 at 919S Hartley  
ALTALINK 20-Oct-16 10:00 21-Oct-16 15:00 29 Hours
Continuous
310p 240 kV B Bus Advice Replace PT2375 and 310p123. Associated redundant protection may be taken out of service one at a time to allow work on the PT circuits.  
ALTALINK 21-Oct-16 08:00 22-Oct-16 17:30 1.4 Days
Continuous
275s1952 - GOI 240kV breaker maintenance  
ALTALINK 22-Oct-16 07:30 22-Oct-16 17:30 10 Hours
Daily
913L (338s-69s-A732s) GOI Replace insulators and perform maintenance around 913L142A switch  
ALTALINK 23-Oct-16 07:30 29-Oct-16 17:30 6.42 Days
Continuous
913L (338s-69s) GOI Replace insulators and perform maintenance  
EPCOR 24-Oct-16 07:00 28-Oct-16 17:00 4.42 Days
Continuous
920L @ Castle downs Ct Replacement  
ATCO 24-Oct-16 08:00 02-Nov-16 17:00 9.38 Days
Daily
7L75 Line mitigation repairs, 861s, 724s, 829s, 754s, & 730s radial fed via 7L68 from 811S Clairmont  
ALTALINK 24-Oct-16 09:30 28-Oct-16 17:30 4.33 Days
Continuous
910L (89s-288s) GOI Component replacement  
ATCO 25-Oct-16 07:00 26-Oct-16 17:00 1.42 Days
Continuous
2029S 500kV Bus,2029S 1209 1209 breaker wiring fix @ 2029s Heathfield  
ALTALINK 25-Oct-16 07:30 25-Oct-16 17:30 10 Hours
Daily
966L/9L966 (650s - A932s) - GOI Emergency Dampre Replacement  
ALTALINK 25-Oct-16 07:30 27-Oct-16 17:30 2.42 Days
Continuous
64s752X,64s37 - GOI 138kV breaker maintenance, replace contacts, replace light above 64s37.  
ATCO 25-Oct-16 08:00 29-Oct-16 17:00 4.38 Days
Continuous
9L46 OPGW repair - String/splice new OPGW section, 9L46 TPR A & B will be OOS, All other fiber traffic will be rerouted  
ALTALINK 26-Oct-16 07:15 26-Oct-16 17:45 10.5 Hours
Daily
83s T1 (TX18502) - GOI Transformer maintenance  
ALTALINK 27-Oct-16 07:30 27-Oct-16 17:30 10 Hours
Daily
1042L (554s - I_485s) - GOI Damper replacements  
ALTALINK 28-Oct-16 07:00 10-Nov-16 18:00 13.5 Days
Continuous
916L (42s-5s) GOI SWCRR: Foundation work  
ALTALINK 28-Oct-16 07:00 10-Nov-16 18:00 13.5 Days
Continuous
693L (42s-C10s) GOI SWCRR: Foundation work  
ATCO 31-Oct-16 07:00 04-Nov-16 17:00 4.42 Days
Continuous
2075S ACF11,2075S 901T Online Pump Addition/Cold Start Upgrade
SVC2 (20K02-ACF21) will remain in service while SVC1 (20K01-ACF11) is out of service.
This will provide no restrictions to the DC or AC system while it is out of service.
 
ALTALINK 31-Oct-16 07:30 09-Nov-16 17:30 9.46 Days
Continuous
1212L (89s - 12s) - GOI Damper Replacement  
ATCO 31-Oct-16 07:30 13-Nov-16 18:00 13.48 Days
Continuous
840S McNeill Station McNeill 2016 Fall turn around. Site shut down for maintenance. Work will be done on 7L830D1 as well during this time AB-SK
BCH 31-Oct-16 09:00 01-Nov-16 17:00 1.33 Days
Continuous
2L294 (Nelway - A.A. Lambert) Structure and Timber Replacements AB-BC
ALTALINK 31-Oct-16 09:30 04-Nov-16 17:30 4.33 Days
Continuous
190L (320p-17s) GOI Line Maintenance  
ALTALINK 31-Oct-16 12:30 31-Oct-16 14:00 90 Mins
Daily
245s87W Advice Trip testing of 245s56W breaker fail - outage unavailable earlier in year.  
ALTALINK 31-Oct-16 12:30 03-Nov-16 17:30 3.21 Days
Continuous
86s1252 (914L) - GOI 240kV Breaker mtce  
ALTALINK 31-Oct-16 14:00 31-Oct-16 15:30 90 Mins
Daily
3s6 Advice Trip testing of 245s56W breaker fail - outage unavailable earlier in year.  
ALTALINK 01-Nov-16 07:30 21-Nov-16 17:30 20.46 Days
Continuous
1038L (138s - 266s - 237s) - GOI Damper Replacements  
ALTALINK 01-Nov-16 10:30 02-Nov-16 17:30 31 Hours
Continuous
59s952 - GOI 240kV breaker maintenance  
ATCO 01-Nov-16 11:00 01-Nov-16 16:00 5 Hours
Continuous
Deerland_S_Telecom moving radio equipment to new building; TPR A and B oos  
ALTALINK 02-Nov-16 08:30 02-Nov-16 17:30 9 Hours
Daily
237s2152 - GOI Replace SF6 gauges on CT  
ALTALINK 03-Nov-16 07:00 04-Nov-16 21:00 1.58 Days
Continuous
653s 653B138-653.3TR - GOI Breaker maintenance  
ATCO 03-Nov-16 07:00 22-Nov-16 17:30 19.48 Days
Continuous
850S 702T,791S 701T,791S 453PT,791S 451PT,791S 410T,791S 403T,791S 400PT7,791S 456PT,791S 400 BUS A,791S 402T,791S 400 BUS T1 maintenance  
ALTALINK 03-Nov-16 08:00 03-Nov-16 13:00 5 Hours
Daily
103s252 - GOI Gas top up  
ALTALINK 03-Nov-16 08:30 03-Nov-16 17:30 9 Hours
Daily
237s2452 - GOI Replace SF6 gauges on CT  
ALTALINK 03-Nov-16 12:30 03-Nov-16 17:30 5 Hours
Daily
103s552 - GOI Gas top up  
ALTALINK 05-Nov-16 06:00 05-Nov-16 21:00 15 Hours
Daily
653s 653B138-653.2TR - GOI Breaker maintenance  
ALTALINK 06-Nov-16 07:00 06-Nov-16 21:00 14 Hours
Daily
653s 653B138-653.1TR - GOI Breaker maintenance  
EPCOR 07-Nov-16 06:00 11-Nov-16 17:00 4.46 Days
Continuous
809 @ Genesee Breaker Maint  
ATCO 07-Nov-16 07:00 10-Nov-16 17:30 3.44 Days
Continuous
845S 144kV Bus,7L33 7L33 ARECL circuit deficiencies  
ALTALINK 07-Nov-16 09:30 09-Nov-16 17:30 2.33 Days
Continuous
190L (320p-17s) GOI Line Maintenance  
ALTALINK 07-Nov-16 10:00 09-Nov-16 17:00 2.29 Days
Continuous
632s PS1 (TX18793) - GOI Bushing change on the transformer.  
ALTALINK 08-Nov-16 09:30 08-Nov-16 14:30 5 Hours
Daily
275s2 - GOI Change tank heaters  
ALTALINK 10-Nov-16 07:30 10-Nov-16 17:30 10 Hours
Daily
1085L (852s-A885s) - GOI Damper Replacements  
ATCO 14-Nov-16 07:00 18-Nov-16 17:30 4.44 Days
Continuous
7L20 tie into the substation and perform end-to-end commissioning.  
ALTALINK 14-Nov-16 07:30 18-Nov-16 17:30 4.42 Days
Continuous
1206L (89s - 12s) - GOI Damper Replacement  
ALTALINK 14-Nov-16 08:00 25-Nov-16 17:00 11.38 Days
Continuous
RATD 929(74s-63s) GOI install foundations for Hazelwood line in/out  
ALTALINK 14-Nov-16 08:00 25-Nov-16 17:00 11.38 Days
Continuous
RATD 925(74s-63s) GOI install foundations for Hazelwood line in/out  
ALTALINK 14-Nov-16 08:30 18-Nov-16 17:30 4.38 Days
Continuous
7L77 (395s-A709s) Advice Replace 395s77E, 395s6 and line protections, add LA's  
ALTALINK 14-Nov-16 09:30 18-Nov-16 17:30 4.33 Days
Continuous
903L (320p-17s) GOI Line Maintenance  
ALTALINK 14-Nov-16 09:45 18-Nov-16 15:45 4.25 Days
Continuous
138kV and 240kV Bus 2 - GOI,39s T2 Upgrading bus protections  
ALTALINK 14-Nov-16 13:00 25-Nov-16 17:00 11.17 Days
Continuous
163s T2 (Tx18482) GOI Replace 163s T2 Bushings, T2 Maintenance, repalce a CT  
ALTALINK 15-Nov-16 09:30 15-Nov-16 17:30 8 Hours
Daily
89s908W (908L) - GOI Adjusting switch  
ALTALINK 18-Nov-16 08:30 18-Nov-16 13:30 5 Hours
Daily
523s880 (880L) GOI Re-wiring CT’s and functional trips  
ATCO 21-Nov-16 08:00 29-Nov-16 17:00 8.38 Days
Continuous
7L75 Line mitigation repairs, 861s, 724s, 829s, 754s, & 730s radial fed via 7L68 from 811S Clairmont  
ALTALINK 21-Nov-16 09:30 24-Nov-16 17:30 3.33 Days
Continuous
903L (320p-17s) GOI Line Maintenance  
ALTALINK 22-Nov-16 07:30 15-Dec-16 17:30 23.42 Days
Continuous
1037L (237s - 266s - 138s) - GOI Damper Replacements  
ATCO 28-Nov-16 07:00 28-Nov-16 12:00 5 Hours
Continuous
7L91 Install bypass  
ALTALINK 28-Nov-16 09:30 02-Dec-16 17:30 4.33 Days
Continuous
903L (320p-17s) GOI Line Maintenance  
ALTALINK 28-Nov-16 09:45 02-Dec-16 15:45 4.25 Days
Continuous
39s T1,138kV and 240kV Bus 1 - GOI Upgrading bus protections  
ATCO 29-Nov-16 08:30 30-Nov-16 17:00 1.35 Days
Continuous
959s SVC Inspect TSC and TCR, install fiber for Xmer ETM.  
ATCO 02-Dec-16 07:00 02-Dec-16 18:00 11 Hours
Continuous
2005s 901A,2005s 901B,2005s 901 Install Fort Hills RAS scheme, 240kV ring will be open @ 2005s. After the GOI is released we will require a T&O for each switch to test indications.  
ATCO 03-Dec-16 07:00 03-Dec-16 18:00 11 Hours
Continuous
2005s 902,2005s 902B,2005s 902A Install Fort Hills RAS scheme, 240kV ring will be open @ 2005s. After the GOI is released we will require a T&O for each switch to test indications.  
ATCO 04-Dec-16 07:00 04-Dec-16 18:00 11 Hours
Continuous
2005s 905A,2005s 905B,2005s 905 Install Fort Hills RAS scheme, 240kV ring will be open @ 2005s. After the GOI is released we will require a T&O for each switch to test indications.  
ATCO 05-Dec-16 07:00 05-Dec-16 18:00 11 Hours
Continuous
2005s 906,2005s 906B,2005s 906A Install Fort Hills RAS scheme, 240kV ring will be open @ 2005s. After the GOI is released we will require a T&O for each switch to test indications.  
ENMAX 03-Jan-17 08:00 03-Jan-17 16:00 8 Hours
Continuous
23.80L. 23.4TR HV SW maintenance SW84, SW87, 23.4MD, SW88?  
ATCO 16-Jan-17 08:00 16-Jan-17 17:00 9 Hours
Continuous
755S 901,9L20 755S - 901 BREAKER SF6 GL315 PARTIAL TESTING

Bkr 901 Maintenance

RFL Relay Commissioning - 9L20 21A Protection at 755S Cordel & 766S Nevis - Operate breakers / MOD's on both ends to test status to new relays
 
ENMAX 23-Jan-17 08:00 24-Jan-17 16:00 1.33 Days
Continuous
7.84L. 36.81L. 36.1TR. 36B138-7.84 HV SW/MD Maintenance 36.1MD, SW81, SW82, SW87, SW88, SW89, SW90 @ 36 Sub. 36.3MD?? SF6 Gas Sample 36B138-7.84  
ENMAX 30-Jan-17 08:00 31-Jan-17 16:00 1.33 Days
Continuous
162s 138KV & 240KV Bus. 162.1TR Doble 162PT240-Z43, HV SW/MD Maintenance 162.1TR 138kV & 240kV MDs, SW81, SW131, SW141.  
ENMAX 01-Feb-17 08:00 02-Feb-17 16:00 1.33 Days
Continuous
162s 138KV & 240KV Bus. 162.2TR Doble Z44PT. HV SW/MD Maintenance 162.2RT 138kV & 240kV MDs, SW88, SW136, SW146  
ENMAX 06-Feb-17 08:00 20-Feb-17 16:00 14.33 Days
Continuous
7.82L (SWCRR)-Relocated a section of 7.82 L around the new planned intersection at 69Str SW and the SWCRR(HW8).  
ENMAX 20-Mar-17 08:00 31-Mar-17 16:00 11.33 Days
Continuous
37.82L. 37s & Janet 138KV Bus Differential Protection Line Protection Upgrade  
ALTALINK 25-Mar-17 07:00 07-Apr-17 17:00 13.42 Days
Continuous
916L (42s-5s) GOI SWCRR: Foundation work for future U/G Riser structures.  
ALTALINK 25-Mar-17 07:00 07-Apr-17 17:00 13.42 Days
Continuous
693L (42s-C10s) GOI SWCRR: Foundation work for future U/G Riser structures.  
ENMAX 01-Apr-17 08:00 01-Apr-17 16:00 8 Hours
Continuous
932L Doble PT 932L  
ALTALINK 13-Apr-17 08:00 27-Apr-17 17:00 14.38 Days
Continuous
38s T4 (Tx18247) GOI Replace T4  
ENMAX 17-Apr-17 08:00 21-Apr-17 16:00 4.33 Days
Continuous
30.81L (SWCRR)-Install new Double Dead-end structures for cut-in to 35 sub and reterminate line, install slack span between 35 sub and new double dead-ends.  
ATCO 24-Apr-17 06:30 28-Apr-17 18:00 4.48 Days
Continuous
840S McNeill Station McNeill 2017 spring turn around. Site shut down for maint. work. AB-SK
ENMAX 01-May-17 08:00 12-May-17 16:00 11.33 Days
Continuous
30.81L (SWCRR)-Disconnect, Remove and Salvage 30.81 line from 42 S to 35 sub, connect the new 35.81 line to 42 S and 35 sub.  
ENMAX 09-May-17 08:00 09-May-17 16:00 8 Hours
Continuous
918L Doble PT 918  
ENMAX 11-May-17 08:00 11-May-17 16:00 8 Hours
Continuous
832L. 10B138-832. 12B138-832 SF6 Gas Sample 10B138-832, Doble 12B138-832  
ENMAX 13-May-17 08:00 24-May-17 16:00 11.33 Days
Continuous
28.80L. 28s & Sarcee 138KV Bus Differential Protection Line Protection Upgrade  
ENMAX 17-May-17 08:00 18-May-17 16:00 1.33 Days
Continuous
833L. 12B138-833 HV Breaker Inspection, Doble 12B138-833.  
ATCO 20-May-17 07:00 22-May-17 17:00 2.42 Days
Continuous
791S 702,7L81 Install new 7L81 RASA & RASB  
ENMAX 29-May-17 08:00 09-Jun-17 16:00 11.33 Days
Continuous
24.83L. 24s & 74s 138KV Bus Differential Protection Line Protection Upgrade on 24.83L  
ENMAX 08-Jun-17 08:00 08-Jun-17 16:00 8 Hours
Continuous
24.83L. 24B138-24.83 Doble breaker  
ALTALINK 17-Jun-17 07:00 08-Jul-17 17:00 21.42 Days
Continuous
906L (17s-42s) GOI. SWCRR: String new alignment  
ALTALINK 17-Jun-17 07:00 08-Jul-17 17:00 21.42 Days
Continuous
928L (17s-42s) GOI. SWCRR: Line relocate: Set structures and string.  
SUNCOR 02-Aug-17 08:00 08-Aug-17 20:00 6.5 Days
Continuous
29PL9-13 (29EDD-34 - 29EDD-65) maintenance from 29PS-216 to 29PS-201  
SUNCOR 09-Aug-17 08:00 15-Aug-17 20:00 6.5 Days
Continuous
29PL9-12 (29EDD-34 - 29EDD-65) 5 YR maintenance - from 29PS220 to 29PS-63 SLD - SL30-P-141-106 & SL30-P141-109  
ALTALINK 28-Aug-17 07:00 01-Oct-17 17:00 34.42 Days
Continuous
693L (42s-C10s) GOI SWCRR: Line construction  
ALTALINK 28-Aug-17 07:00 01-Oct-17 17:00 34.42 Days
Continuous
916L (42s-5s) GOI SWCRR: Line construction  
ATCO 11-Sep-17 06:30 15-Sep-17 18:00 4.48 Days
Continuous
840S McNeill Station McNeill 2017 Fall turn around. Site shut down for maint. work. AB-SK
ALTALINK 12-Sep-17 09:00 23-Sep-17 17:00 11.33 Days
Continuous
799s1 and 799s32 Advice (786L) BC work AB-BC
ATCO 09-Feb-18 07:00 11-Feb-18 17:30 2.44 Days
Continuous
9L07 String new portion 9L01/9L30 over 9L07 for new 951S Thickwood Hills substation.  
ATCO 15-Feb-18 07:00 24-Feb-18 17:30 9.44 Days
Daily
9L01 9L01 Cut in for in and out addition of 951S Thickwood Hills substation. Install new structures.  
ATCO 18-Sep-18 07:00 20-Sep-18 17:30 2.44 Days
Continuous
9L01 9L01 Cut in for in and out addition of 951S Thickwood Hills substation. Remove bypass at substation.  
ATCO 25-Sep-18 07:00 27-Sep-18 17:30 2.44 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: 2016-09-28   5:30:22 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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