Alberta Electric System Operator
System Co-ordination Plan
2023-03-02 to 2023-03-10
Approved Outages

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From To Owner Type Element Scheduled Activity Date/Time Comments Interconnection
05-Oct-18 08:00 31-Dec-23 16:00 EPCOR IO C2 (Rossdale) forced outage 1,913.38 Days
Continuous		  
24-Oct-18 01:13 31-Dec-23 16:00 EPCOR IO C1 (Rossdale) forced outage 1,894.66 Days
Continuous		  
05-Jan-21 08:00 01-Jun-23 18:00 SUNCOR Outage Unmodeled Transmission Facility (Suncor) 29PT-69
877.38 Days
Continuous		  
01-Jan-22 08:00 06-Mar-23 18:00 SUNCOR Outage Unmodeled Transmission Facility (Suncor) 30EDD-200 429.42 Days
Daily		  
01-Jan-22 08:00 07-Mar-23 18:00 SUNCOR Outage Unmodeled Transmission Facility (Suncor) 30EDD-200 430.42 Days
Daily		  
14-Mar-22 14:00 02-Jun-23 18:00 ATCO TE 813s SVC (813s Little Smoky) emergency real time failed relay 445.17 Days
Continuous		  
18-Apr-22 08:00 29-May-23 17:00 ATCO TE 813s Little Smoky 144kV Bus 1, 813s Little Smoky 144kV Bus 2, 813s Little Smoky 240kV Bus 1, 813s Little Smoky 240kV Bus 2 813S Little Smoky rebuild: cutover wiring to the new relays as their corresponding apparatus are out of service 406.38 Days
Continuous		  
18-Apr-22 08:00 29-May-23 17:00 ATCO TE 813s Little Smoky 813S Little Smoky rebuild: cutover wiring to the new relays as their corresponding apparatus are out of service 406.38 Days
Continuous		  
19-Apr-22 08:00 29-May-23 17:00 ATCO TE 813s Little Smoky protection relay work 405.38 Days
Continuous		  
15-May-22 15:10 28-Mar-23 17:00 SUNCOR, ACCIONA Outage 139s C1 (139s Hillridge), 139s 52-C (139s Hillridge) repairs on the charging motor operating mechanism 317.08 Days
Continuous		  
04-Sep-22 16:50 30-Sep-24 18:00 ATCO Outage 848s 401R (848s Ruth Lake) forced outage 757.05 Days
Continuous		  
12-Dec-22 03:10 05-May-23 18:00 ALTALINK Outage 421s C1 (421s Hays) forced outage due to breaker 421s 30 failure 144.58 Days
Continuous		  
03-Jan-23 07:00 31-Mar-23 17:00 EPCOR TE 330p Genesee, 330p RTU/SCADA (330p Genesee) relay maintenance and updates 87.38 Days
Continuous		  
03-Jan-23 07:00 31-Mar-23 17:00 EPCOR TE 814s Bellamy relay maintenance and updates 87.38 Days
Continuous		  
03-Jan-23 12:00 19-May-23 16:00 ENMAX Outage 14.2C (SS-14) forced outage 136.13 Days
Continuous		  
09-Jan-23 07:00 07-Apr-23 17:00 EPCOR TE Woodcroft P&C- 72 kV protection relay maintenance 88.38 Days
Continuous		  
09-Jan-23 07:00 07-Apr-23 17:00 EPCOR TE Namao P&C- 72 kV protection relay maintenance 88.38 Days
Continuous		  
09-Jan-23 07:00 07-Apr-23 17:00 EPCOR TE 987s Clover Bar P&C- 72 kV protection relay maintenance 88.38 Days
Continuous		  
12-Jan-23 08:00 06-Mar-23 08:30 ATCO IO 730S SVS SVS isolation from 730s. COG for construction 53.02 Days
Continuous		  
23-Jan-23 08:00 31-Mar-23 18:00 CNRL, ATCO TE 847s Muskeg River, ATCO TPR Outage transferring teleprotection circuits from 9L66 relay to open bay PLT-260 relays 67.38 Days
Continuous		  
27-Jan-23 15:20 31-Mar-23 16:00 BCH, ALTALINK RB 5L94 (BCH Cranbrook - 102s Langdon), 1201L (520s Bennett - BCH Cranbrook) emergency - BCH disabling recloser 62.99 Days
Continuous		  
02-Feb-23 06:28 03-Mar-23 18:00 ATCO Outage 959s SVC (959s Lanfine), 959s 921 (959s Lanfine) forced outage 29.48 Days
Continuous		  
06-Feb-23 10:00 06-Mar-23 10:00 ATCO Outage 813s 713 (813s Little Smoky), 813s 717 (813s Little Smoky), 813s 714C (813s Little Smoky), 813s 715C (813s Little Smoky), 813s 716C (813s Little Smoky) wiring panels and relay programming 28 Days
Continuous		  
06-Feb-23 11:00 03-Mar-23 16:00 ATCO TE 848s Ruth Lake relay testing 46 Relays, 86 Aux relays PRC005 25.21 Days
Continuous		  
07-Feb-23 13:00 07-Mar-23 09:13 ATCO TE 813s Little Smoky 901T - block 87TB/901T relay for 701CT injection 27.84 Days
Continuous		  
09-Feb-23 12:01 06-Mar-23 07:59 ATCO Outage 7L121 (2043s Freer - 7LA121 tap) jumper 2 open until 7L121D3 is installed 24.83 Days
Continuous		  
11-Feb-23 07:00 10-Mar-23 18:00 ALTALINK TE 895s RTU/SCADA (895s Suffield) supervisory visibility outages required to download new configurations 27.46 Days
Daily		  
12-Feb-23 13:00 02-Mar-23 13:00 ENMAX IO 1080L (SS-25 - SS-65) AltaLink expansion of GOI zone for urgent work to replace 1080L cables into C25s for scaffolding for cable terminations 18 Days
Continuous		  
12-Feb-23 13:00 02-Mar-23 13:00 ALTALINK, ENMAX Outage 1080L (SS-25 - SS-65), 240kV West Bus (SS-25), 25B240-D139 (SS-25), 25B240-D142 (SS-25), 25B240-D133 (SS-25), 25B240-D136 (SS-25), 25B240-D138 (SS-25), 25MD240-1080 (SS-25) expansion of GOI zone for urgent work to replace 1080L cables into C25s for scaffolding for cable terminations 18 Days
Continuous		  
13-Feb-23 07:00 31-Mar-23 17:00 EPCOR Outage T2 (Garneau), G725 (Garneau), G726 (Garneau), GAB2 (Garneau), GT2-O (GARNEAU) transformer replacement 46.38 Days
Continuous		  
13-Feb-23 13:00 07-Mar-23 09:13 ATCO TE 813s 901T (813s Little Smoky) block 87TB/901T relay for 701CT injection 21.84 Days
Continuous		  
14-Feb-23 09:30 31-Mar-23 17:30 ATCO TE 772s RTU/SCADA (772s Youngstown) RTU updates 45.29 Days
Continuous		  
21-Feb-23 09:30 03-Mar-23 17:30 ATCO TE ATCO PMU, 2029s RTU/SCADA (2029s Heathfield) 2029s PMU channel calibration and test new computer and archive storage device 10.33 Days
Continuous		  
21-Feb-23 10:00 31-Mar-23 17:00 ATCO, CNRL TE 847s RTU/SCADA (847s Muskeg River) download RTU program changes for 9L66 line relocation in 847S Muskeg Rive 38.25 Days
Continuous		  
21-Feb-23 10:00 03-Mar-23 17:00 CNRL, ATCO TE 847s Muskeg River, 849s Joslyn Creek, ATCO TPR Outage transferring teleprotection circuits from 9L66 relay to open bay PLT-260 relays
10.29 Days
Continuous		  
21-Feb-23 12:00 16-Mar-23 18:00 ALTALINK Outage 174L (197s Bardo - 395s North Holden), 395s 174W (395s North Holden) rebuild 174L from existing structure 174L692 to 174L742 23.21 Days
Continuous		  
27-Feb-23 07:00 17-Mar-23 17:00 EPCOR Outage T3 (Strathcona), S723 (Strathcona), SAB3 (Strathcona) Strathcona: protection upgrade cut overs 18.38 Days
Continuous		  
27-Feb-23 07:00 21-Mar-23 17:00 EPCOR Outage 72LS24 (EP 803s Lambton - Strathcona), 72LH8 (EP 803s Lambton - EP Hardisty), EP 803s T3 (EP 803s Lambton), S724 (Strathcona), EP 803s L721 (EP 803s Lambton), SDS10 (Strathcona), EP 803s LDS14 (EP 803s Lambton), EP 803s LAB3 (EP 803s Lambton) Strathcona/Lambton: Strathcona protection upgrade cut overs 22.38 Days
Continuous		  
27-Feb-23 08:00 03-Mar-23 16:00 BCH Outage 5CB21 (BCH Cranbrook) BC protection work 4.33 Days
Daily		 AB-BC
27-Feb-23 08:00 03-Mar-23 16:00 BCH RB 5L94 (BCH Cranbrook - 102s Langdon) BC protection work 4.33 Days
Continuous		  
27-Feb-23 08:00 09-Mar-23 17:00 ALTALINK IO 511s Info Only configuration changes to equipment 10.38 Days
Continuous		  
27-Feb-23 08:00 03-Mar-23 17:00 ALTALINK TE 275s RTU/SCADA (275s Jenner) to add and test new alarm points for DC splitting/battery bank expansion project 4.38 Days
Continuous		  
27-Feb-23 08:00 03-Mar-23 16:00 ALTALINK IO 5L94/1201L protection BCH - Info BCH work. CBK 5L94 / 1201L PYPN PN/TC, and reclosing OOS. 1201L primary and secondary protection will be out of service one at a time 4.33 Days
Daily		  
27-Feb-23 08:00 03-Mar-23 17:00 ATCO TE 780s RTU/SCADA (780s Lubicon) RTU configuration update with additions for BMS alarming 4.38 Days
Continuous		  
27-Feb-23 09:00 31-Mar-23 17:00 ATCO RB 9L23 (848s Ruth Lake - 977s Salt Creek), 7L71 (848s Ruth Lake - 2082s Dog Rib), 7L71 (718s Parsons Creek - 2082s Dog Rib), 7L47 (718s Parsons Creek - 848s Ruth Lake) stringing new 9L193/9L162 over top of existing lines 7L71, 7L47, 9L23 32.29 Days
Continuous		  
27-Feb-23 10:00 08-Mar-23 15:00 ATCO Outage 7L80 (733s Simonette - 857s Kakwa Ridge), 7L80 (740s H.R. Milner - 857s Kakwa Ridge) line mitigation, cross arm replacement 9.21 Days
Continuous		  
27-Feb-23 10:00 12-Mar-23 12:00 ATCO Outage 7L30 (732s Mitsue - 844s AEC Mill), 732s 704 (732s Mitsue), 732s 707 (732s Mitsue), 844s 703 (844s AEC Mill), 732s 7L30D1 (732s Mitsue) 7L30 protection upgrade 13.04 Days
Continuous		  
27-Feb-23 10:00 02-Mar-23 16:00 ATCO TE 730s Rycroft PRC-005 microprocessor relay testing - 7L10, 7L68, 7L73, 144 kV breakers 3.25 Days
Continuous		  
27-Feb-23 11:00 27-Mar-23 10:00 ATCO TE 732s RTU/SCADA (732s Mitsue) 7L30, 7L31 protection upgrade, RTU upgrade - 7L23, 7L49, 7L162, 144 kV bus and breakers 27.92 Days
Continuous		  
27-Feb-23 11:00 27-Mar-23 10:00 ATCO TE 844s RTU/SCADA (844s AEC Mill) 7L30, 7L31 protection upgrade, RTU upgrade - 144 kV bus
27.92 Days
Continuous		  
01-Mar-23 06:00 04-Mar-23 18:00 ALTALINK Outage 700L (422s Westwood - 746L tap), 700L (746s Sherwood Park - 746L tap), 746L (700L tap - 746AL tap) 700L line relocation between structures 23 and 41 3.5 Days
Continuous		  
01-Mar-23 07:30 13-Mar-23 18:00 CNRL IO 75-PLH-901 (838s Horizon Mining - 849s Joslyn Creek) ATCO 838S substation expansion tie-in work and protective relay upgrades 12.4 Days
Continuous		  
01-Mar-23 07:30 13-Mar-23 18:00 CNRL, ATCO Outage 75-PLH-901 (838s Horizon Mining - 849s Joslyn Creek), 849s 907 (849s Joslyn Creek) Horizon Project - disconnect existing 75-PLH-901 from former 75-PLH-901 bay to new 838S-900BS2 12.4 Days
Continuous		  
01-Mar-23 08:00 07-Mar-23 18:00 SUNCOR Outage 29EDD-71 29PT-336 (29EDD-71), 29EDD-71 752-4651 (29EDD-71), 29EDD-71 752-4652 (29EDD-71), 29EDD-71 752-4654 (29EDD-71), 29EDD-71 29PS-434 (29EDD-71 Edd71Sub), 29EDD-71 29PS-430 (29EDD-71 Edd71Sub), 29EDD-71 30-252-12501 (29EDD-71) maintenance and testing 6.42 Days
Continuous		  
01-Mar-23 08:00 02-Mar-23 17:00 ALTALINK TE 71s Lamoureux PRC relay maintenance - 726L, 997L 1.38 Days
Daily		  
01-Mar-23 08:00 02-Mar-23 17:00 ALTALINK TE 102s Langdon standard relay maintenance 1.38 Days
Daily		  
01-Mar-23 08:00 02-Mar-23 20:00 ALTALINK TE 308s RTU/SCADA (308s Albchem Beaverhill Creek) reconfigure alarms 1.5 Days
Daily		  
01-Mar-23 08:00 02-Mar-23 20:00 ALTALINK TE 410s RTU/SCADA (410s Josephburg) reconfigure alarms 1.5 Days
Daily		  
01-Mar-23 08:00 02-Mar-23 20:00 ALTALINK TE 308s Albchem Beaverhill Creek, 410s Josephburg configuration changes - 776L at both 308s and 410s 1.5 Days
Daily		  
01-Mar-23 10:00 31-Mar-23 17:00 ATCO TE 849s RTU/SCADA (849s Joslyn Creek) download changes to RTU and HMI 30.25 Days
Continuous		  
01-Mar-23 10:00 31-Mar-23 17:00 ATCO TE 849s RTU/SCADA (849s Joslyn Creek) download changes to 849S Joslyn RTU and HMI 30.25 Days
Continuous		  
01-Mar-23 13:00 03-Mar-23 17:30 ATCO Outage 2075s 900SST2 (2075s Newell) 900SST2 PRD trip removal 2.19 Days
Continuous		  
02-Mar-23 07:00 02-Mar-23 17:00 EPCOR Outage 557s CD2403 (557s Castle Downs) emergency dashpot repair 10 Hours
Continuous		  
02-Mar-23 08:00 05-Mar-23 16:00 ENMAX TE SS-25 240 kV bus differential zone 43 A and B - lockout testing 3.33 Days
Daily		  
02-Mar-23 08:00 02-Mar-23 17:00 ALTALINK TE 102s Langdon, 102s 240kV East Bus (102s Langdon) relay maintenance 9 Hours
Daily		  
02-Mar-23 08:00 02-Mar-23 17:00 ALTALINK TE 138s 240kV Bus 1 (138s Windy Flats), 138s 240kV Bus 2 (138s Windy Flats) standard relay maintenance 9 Hours
Continuous		  
02-Mar-23 08:00 02-Mar-23 17:00 ALTALINK TE 430s Ursus maintenance on 997L A21/87/L1 and 997L B21/87/L1 protections 9 Hours
Daily		  
02-Mar-23 08:00 02-Mar-23 17:00 ALTALINK TE 410s Josephburg maintenance on 857L A87/L6 and 857L B87/L6 protections 9 Hours
Daily		  
02-Mar-23 08:00 02-Mar-23 17:00 ALTALINK TE 409s Shell Scotford maintenance on 857L A87/21/79/L3 and 857L B87/21/L3 protections 9 Hours
Daily		  
02-Mar-23 08:00 04-Mar-23 18:00 ENMAX Outage 65.1TR (SS-65), 240kV South Bus (SS-65), 138kV South Bus (SS-65), 65B240-D130 (SS-65), 65B240-D133 (SS-65), 65B138-D81 (SS-65), 65B138-D83 (SS-65), 65MD240-65.1TR (SS-65), 65MD138-65.1TR (SS-65) maintenance on SW130, SW136, SW88, SW80, SW81, SW83, MD138-65.1TR, MD240-65.1TR 2.42 Days
Continuous		  
02-Mar-23 08:00 02-Mar-23 17:00 ALTALINK TE AltaLink Radio Tower, 127s RTU/SCADA (127s Bruderheim), 308s RTU/SCADA (308s Albchem Beaverhill Creek), 365s RTU/SCADA (365s Canadianoxy Astotin Creek) replace flash card 9013R radio 9 Hours
Daily		  
02-Mar-23 08:00 04-Mar-23 18:00 ALTALINK IO 65.1TR (C65s) Enmax - Info ENMAX HV SW maintenance on SW130, SW136, SW88, SW80, SW81, SW83, MD138-65.1TR, MD240-65.1TR 2.42 Days
Continuous		  
02-Mar-23 09:30 02-Mar-23 12:30 ALTALINK Outage 17s C1 (17s Benalto) maintenance on PRC load readings and trip coil checks 3 Hours
Daily		  
02-Mar-23 10:00 02-Mar-23 16:00 ATCO TE 722s Crystal Lake 144 kV breakers - relay testing 6 Hours
Continuous		  
02-Mar-23 13:00 02-Mar-23 17:00 ALTALINK TE 852s RTU/SCADA (852s Round Hill), AltaLink TPR Outage, AltaLink MPLS card replacement 4 Hours
Daily		  
03-Mar-23 08:00 03-Mar-23 12:00 ENMAX Outage 25B240-D140 (SS-25) HV breaker SF6 gas sample 4 Hours
Continuous		  
03-Mar-23 08:00 03-Mar-23 16:00 ALTALINK TE 54s RTU/SCADA (54s Fort Saskatchewan), AltaLink TPR Outage, AltaLink MPLS upgrade MPLS nodes and card replacement 8 Hours
Daily		  
03-Mar-23 09:00 03-Mar-23 12:00 BSRW Trans Test 1019s C1 (1019s Woolchester), 1019s C2 (1019s Woolchester) capacitor testing 3 Hours
Continuous		  
03-Mar-23 12:00 03-Mar-23 16:00 ENMAX Outage 25B240-D141 (SS-25) HV breaker SF6 gas sample 4 Hours
Continuous		  
04-Mar-23 07:30 13-Mar-23 18:00 CNRL RB 75-PLH-902 (838s Horizon Mining - 849s Joslyn Creek) reclosing blocked on 75-PLH-902 for adjacent work on 75-PLH-901 9.4 Days
Continuous		  
05-Mar-23 08:00 05-Mar-23 11:59 ENMAX Outage 25B240-D131 (SS-25) breaker SF6 gas sample 3.98 Hours
Continuous		  
05-Mar-23 12:00 05-Mar-23 16:00 ENMAX Outage 25B240-D132 (SS-25) breaker SF6 gas sample 4 Hours
Continuous		  
06-Mar-23 07:00 06-Mar-23 17:00 ALTALINK IO 1098L (Poundmaker-E805s) Epcor - Info Jasper: JDS1 Disconnect Maintenance 10 Hours
Daily		  
06-Mar-23 07:00 06-Mar-23 17:00 EPCOR Outage 1098L Jasper Zone @ Jasper Terminal E805S and Poundmaker, 1098L (EP 805s Jasper - Poundmaker) Jasper: JDS1 Disconnect Maintenance 10 Hours
Continuous		  
06-Mar-23 07:00 10-Mar-23 17:00 EPCOR Outage TX2 @ Namao, T2 (Namao) Namao: TX2 Zone P&C Maintenance 4.42 Days
Continuous		  
06-Mar-23 07:00 11-Mar-23 17:00 EPCOR Outage T4 (Rossdale) UGT backfill replacement under low bus 5.42 Days
Continuous		  
06-Mar-23 07:00 10-Mar-23 17:00 ALTALINK RB 700/746L (422s-746DL19-746s) - R/B-LL Reclosure blocking is required to complete portion of 700L Line Relocation between structures 23 and 40. 4.42 Days
Daily		  
06-Mar-23 07:00 10-Mar-23 15:00 ALTALINK, EPCOR TE 1238L (330p Genesee - 510s Sunnybrook) relay work on 1238L B @ 330p 4.33 Days
Daily		  
06-Mar-23 07:00 09-Mar-23 17:00 ALTALINK TE 225L (67s Stirling - 225AL tap) replace relay output card 3.42 Days
Continuous		  
06-Mar-23 07:00 24-Mar-23 18:00 ALTALINK TE 254s RTU/SCADA (254s Coaldale) configuration changes 18.42 Days
Daily		  
06-Mar-23 07:00 30-Jun-23 17:00 EPCOR TE Meadowlark meadowlark: P&C- relay maintenance 116.38 Days
Continuous		  
06-Mar-23 07:15 10-Mar-23 17:45 ALTALINK Outage 50L (44s Bearspaw Plant - SS-21) insulator and structure repair - (str 115-125) 4.44 Days
Continuous		  
06-Mar-23 08:00 09-Mar-23 17:00 ALTALINK RB 150AL(271s-180s-42s-20s) RB-LL 150AL Line clearance (STR 10-19) 3.38 Days
Daily		  
06-Mar-23 08:00 08-Mar-23 18:00 ALTALINK IO 65.2TR (C65s) Enmax - Info HV SW Maint. SW141, SW135, SW86, SW93, SW87, MD138-65.2TR, MD240-65.2TR 2.42 Days
Continuous		  
06-Mar-23 08:00 08-Mar-23 18:00 ENMAX Outage 65.2TR (SS-65), 65B138-D85 (SS-65), 65B138-D82 (SS-65), 65B240-D132 (SS-65), 65B240-D135 (SS-65), 65MD138-65.2TR (SS-65), 65MD240-65.2TR (SS-65), SW93 (SS-65), SW86 (SS-65), SW135 (SS-65), SW141 (SS-65) maintenance work 2.42 Days
Continuous		  
06-Mar-23 08:00 06-Mar-23 12:00 ENMAX Outage 25B240-D134 (SS-25) HV breaker SF6 gas sample 
4 Hours
Continuous		  
06-Mar-23 08:00 10-Mar-23 17:00 ALTALINK TE 275s RTU/SCADA (275s Jenner) test new alarm points 4.38 Days
Continuous		  
06-Mar-23 08:00 07-Mar-23 19:00 ATCO Outage 2043s Freer, 7L121 (2043s Freer - 7LA121 tap), 7L121 (860s Crow - 7LA121 tap), 7LA121 (833s Mariana - 7L121 tap) require a station outage to the newly commissioned 2043s to complete a few deficiencies 1.46 Days
Continuous		  
06-Mar-23 08:00 06-Mar-23 17:00 SUNCOR TE 635PL7-1002 B protection and breaker failure B protection outage of 635PL7-1002 B protection and breaker failure B protection to replace the fiber optic
A protection will remain in service		 9 Hours
Continuous		  
06-Mar-23 08:00 08-Mar-23 16:00 ENMAX TE SS-25 25sub 240kV Bus Differential Zone 44 A and B Protection Scheme outage. Relay, Lockout Testing. 25-Z44A-86, 25-Z44B-86 2.33 Days
Continuous		  
06-Mar-23 08:00 09-Mar-23 16:00 ENMAX Outage 162.4TR (SS-162) relay, protection testing 3.33 Days
Continuous		  
06-Mar-23 08:00 14-Mar-23 14:00 ATCO TE 749S 7L44 Protection Relay, 749S 7L33 Protection Relay Relay Settings change is required due to Telecom outage 2-71107, 2-71108 and 2-70994 8.21 Days
Continuous		  
06-Mar-23 08:00 12-Mar-23 18:00 SUNCOR TE 29EDD-34 One element out of service at a time to change relay settings on
RELAY, PROTECTION,50BF, P122, 65210200T
RELAY,PROTECTION,50BF,P122,FOR 65210301
RELAY,PROTECTION,50BF, P122, FOR 652-10302
RELAYPROTECTION,50BF,P122,FOR 65210201
RELAY,PROTECTION,50BF,P122,FOR 652-10202
RELAY,PROTECTION,50BF,C60,952-143
RELAY,PROTECTION,50BF,C60,952-133

All of the outages being reported will have either redundant feeds and/or redundant protection or upstream protection.
Any rolling outages are specified to have one element out at a time.		 6.38 Days
Continuous		  
06-Mar-23 08:30 06-Mar-23 17:30 ATCO TE 730S 7L68 Protection Relay Temporary settings change for telecommunications Outage 2-70805
7L68 Zone 2 time delay temporarily reduced to 5 cycles at Rycroft end (no change to Clairmont end).		 9 Hours
Continuous		  
06-Mar-23 09:00 06-Mar-23 16:00 ATCO TE Kleskun_T-Telecom Outage to Radio Link to Crystal Lake - Microwave Radio Antenna Tarp replacement at Kleskun Hills Tower Facing Crystal Lake Sub
TPRNN026/7L68B CLAIRMONT_S RYCROFT_S
TPRNN117/7L68A CLAIRMONT_S RYCROFT_S
TPRCP027/7L68RASA CLAIRMONT_S KSITUAN_S-A		 7 Hours
Continuous		  
06-Mar-23 09:30 10-Mar-23 15:00 EPCOR TE 1238L "B" Protection Blocking @ Genesee 330P and SunnyBrook 510S Genesee/SunnyBrook: 1238L "B" Protection SEL411 Blocking for P&C Maintenance 4.23 Days
Continuous		  
06-Mar-23 10:00 13-Mar-23 12:00 ATCO Outage 7L12 (834s Wesley Creek - 7LA12 tap) changing arms and pole repairs 7.04 Days
Continuous		  
06-Mar-23 10:00 06-Mar-23 13:00 ATCO Outage 780s 701 (780s Lubicon) PRC-005 trip coil testing 3 Hours
Continuous		  
06-Mar-23 10:00 06-Mar-23 16:00 ALTALINK Outage 746s T1 (746s Sherwood Park) replace 746s48 6 Hours
Daily		  
06-Mar-23 10:00 06-Mar-23 17:00 ALTALINK TE 945s Relay (551L) 551L (L3) ‘A’ Protection outage. DNP setting changes and testing for implementation of fault reporting to SCADA. 'A' Protection to remain in service to maintain redundancy 7 Hours
Daily		  
06-Mar-23 10:00 06-Mar-23 12:00 SUNCOR TE Loss of visibility of 29EDD-1 72kV relay metering to SCADA and AESO from 29PL6-3, 29PL6-4, 29PL6-22, 29PL6-6 . Nmap port scan of relays for NERC CIP compliance requirements 2 Hours
Continuous		  
06-Mar-23 10:00 06-Mar-23 14:00 ALTALINK Outage 535s T2 (535s Joffre) customer bus duct inspection 4 Hours
Daily		  
06-Mar-23 11:00 06-Mar-23 17:00 ALTALINK TE 681s Bannerman maintenance on A87/240B1 & B87/240B1 protections 6 Hours
Daily		  
06-Mar-23 11:00 06-Mar-23 17:00 ALTALINK TE 255s Vulcan standard relay maintenance 6 Hours
Daily		  
06-Mar-23 11:00 09-Mar-23 17:00 ALTALINK TE 102s Langdon standard relay maintenance, 3.25 Days
Daily		  
06-Mar-23 11:00 10-Mar-23 16:00 ATCO TE 930S Batteries and Chargers, 930S Substation RTU Battery Monitoring System addition to battery bank
RTU alarm configuration updates
Loss of visibility for 5 - 10 min during download		 4.21 Days
Continuous		  
06-Mar-23 11:00 06-Mar-23 17:00 ALTALINK TE 384s - Relays PRC Maintenance UF 81 BE181O/U2 - Underfrequency load shed at 384s will be out of service less than 4 hours in the timeframe indicated. B138B 87/138B MFAC34 - 138KV bus differential will be out of service less than 4 hours in the timeframe indicated. 6 Hours
Daily		  
06-Mar-23 11:00 07-Mar-23 17:00 ALTALINK TE 68s (995AL) - Relays Techs to perform relay maintenance on the following: 995AL 59B-C & 995AL 59/6.9B, 995AL 59B-A Relays will be removed from service one at a time for mtce. Redundant protection to remain in service at all times. 30 Hours
Daily		  
06-Mar-23 11:00 09-Mar-23 16:00 ALTALINK Outage 40s T1 (40s Wetaskiwin) T1 maintain, fix leaks, test, change out pin caps on low side switch/bushings 3.21 Days
Continuous		  
06-Mar-23 11:00 07-Mar-23 16:00 ATCO TE 780S 144kV Breaker Relays 21A/7L63 21B/7L63 50BF/701, 50BF/702 RTXP test switch replacement using CT shorting at breakers 21A relay testing, Backup protection in service 29 Hours
Continuous		  
06-Mar-23 12:00 06-Mar-23 16:00 ENMAX Outage 25B240-D135 (SS-25) HV breaker SF6 gas sample  4 Hours
Continuous		  
06-Mar-23 12:00 09-Mar-23 10:00 ALTALINK Outage 945L (275s Jenner - 562s Cypress), 275s 5 (275s Jenner), 275s 8 (275s Jenner), 275s 945N (275s Jenner), 562s 152 (562s Cypress), 562s 252 (562s Cypress), 562s 945 (562s Cypress) complete functional testing and final acceptance on L4 ‘A’ and L4 ‘B’ protections at 275s Jenner. Second scope of work: Testing L4 ‘A’ and L4 ‘B’ teleprotections at 275s Jenner 2.92 Days
Continuous		  
06-Mar-23 12:00 14-Mar-23 14:00 ATCO TE 845S 7L44 Protection Relay, 845S 7L33 Protection Relay Relay Settings change is required due to Telecom outage 2-71107, 2-71108 and 2-70994, Relay Settings change is required due to Telecom outage 2-71107, 2-71108 and 2-70994
8.04 Days
Continuous		  
06-Mar-23 12:30 06-Mar-23 17:30 ALTALINK Outage 55s T1 (55s Olds) T1 tap changer filter trouble (replace motor) 5 Hours
Daily		  
07-Mar-23 07:00 07-Mar-23 18:00 ALTALINK Outage 99s 138kV Bus (99s North St. Albert), 99s T1 (99s North St. Albert), 99s 747X (99s North St. Albert), 99s 3 (99s North St. Albert), 747L3A (711L tap) clean hot spot on 99s3 and 99s4 11 Hours
Daily		  
07-Mar-23 07:00 07-Mar-23 17:00 EPCOR Outage EP 805s J2404 (EP 805s Jasper) J2404 red button repair 10 Hours
Continuous		  
07-Mar-23 08:00 07-Mar-23 17:00 ALTALINK TE 235s Entwistle update settings on 87/138B relay 9 Hours
Daily		  
07-Mar-23 08:00 07-Mar-23 17:00 ALTALINK TE 235s RTU/SCADA (235s Entwistle) change RTU configuration to add new component alarm 9 Hours
Daily		  
07-Mar-23 08:00 08-Mar-23 12:00 ALTALINK TE 498s Tilley DNP setting changes and testing for implementation of fault reporting to SCADA 28 Hours
Continuous		  
07-Mar-23 08:00 08-Mar-23 17:00 ALTALINK TE 59s Peigan relay maintenance 1.38 Days
Daily		  
07-Mar-23 08:00 08-Mar-23 17:00 ALTALINK TE 138s Windy Flats relay maintenance 1.38 Days
Daily		  
07-Mar-23 08:00 07-Mar-23 17:00 ALTALINK TE 19s RTU/SCADA (19s Wabamun), AltaLink Radio Tower, AltaLink TPR Outage 9310R radio - software upgrade and dish realignment 9 Hours
Daily		  
07-Mar-23 08:00 07-Mar-23 12:00 ALTALINK TE 140s RTU/SCADA (140s Thompson) confirm the new 3.3 EMS connects to sites in the field 4 Hours
Daily		  
07-Mar-23 08:00 07-Mar-23 17:00 ATCO TE 778s RTU/SCADA (778s Big Valley), ATCO Radio Tower Big Valley_S-Telecom - re-establish trust with firewall on site 9 Hours
Continuous		  
07-Mar-23 09:00 07-Mar-23 16:00 ATCO RB 7L94 (827s Cranberry Lake - 878s Kidney Lake), 7L60 (780s Lubicon - 827s Cranberry Lake) pole change 7 Hours
Continuous		  
07-Mar-23 10:00 07-Mar-23 14:00 ATCO TE ATCO Radio Tower, ATCO TPR Outage, 2049s RTU/SCADA (2049s Kettle River), 931s RTU/SCADA (931s Bohn) Chard_T-Telecom - SAR chassis replacement 4 Hours
Continuous		  
07-Mar-23 10:00 07-Mar-23 14:00 ALTALINK IO Chard telecom - atco Info Chard Tower SAR chassis replacement 4 Hours
Daily		  
07-Mar-23 10:00 07-Mar-23 14:00 ALTALINK IO 9L990 (72s-2049s) Open-end for ATCO Chard Telecom outage - ATCO, open end 9L990 @ 72s due to double TPR outage 4 Hours
Daily		  
07-Mar-23 10:00 07-Mar-23 16:00 ATCO Outage 780s 702 (780s Lubicon) PRC-005 trip coil testing 6 Hours
Continuous		  
07-Mar-23 10:00 07-Mar-23 16:00 ATCO TE 813s Little Smoky 144 kV bus - relay maintenance 6 Hours
Continuous		  
07-Mar-23 10:00 07-Mar-23 14:00 ATCO Outage 9L990 (72s Leismer - 2049s Kettle River), 2049s 9L990D1 (2049s Kettle River) Chard Telecom work - open end 9L990 at 72s due to double TPR outage 4 Hours
Continuous		  
08-Mar-23 07:00 08-Mar-23 17:00 EPCOR Outage 557s CD2401 (557s Castle Downs) CastleDowns: NAIT tour switching demonstration 10 Hours
Continuous		  
08-Mar-23 08:00 08-Mar-23 17:00 ALTALINK TE 862L (166s Dow Chemical Fort Saskatchewan - 258s Dow Hydrocarbons) 166s relay, PRC maintenance 9 Hours
Daily		  
08-Mar-23 08:00 08-Mar-23 17:00 ALTALINK TE 535s Joffre standard relay maintenance 9 Hours
Daily		  
08-Mar-23 08:00 08-Mar-23 17:00 ALTALINK TE 247s Piper Creek standard relay maintenance 9 Hours
Daily		  
08-Mar-23 08:00 08-Mar-23 17:00 ALTALINK TE 87s Gaetz standard relay maintenance 9 Hours
Daily		  
08-Mar-23 08:00 08-Mar-23 17:00 ALTALINK TE 131s RTU/SCADA (131s Moon Lake), AltaLink Radio Tower 131s - 9516R radio - align antennas 9 Hours
Daily		  
08-Mar-23 08:00 08-Mar-23 17:00 SUNCOR Outage 635EDD-1000 635-752-122 (635EDD-1000) maintenance
9 Hours
Continuous		  
08-Mar-23 08:00 08-Mar-23 12:00 ALTALINK TE 447s RTU/SCADA (447s Enchant) new 3.3 EMS connection to sites in the field 4 Hours
Daily		  
08-Mar-23 08:00 15-Mar-23 17:00 ATCO RB 7L65 (709s Vegreville - 7LA65 tap) install rider poles between structures 34 & 35 on old 7L65 line, stringing conductor on 7L65 Phase 2 rebuild 7.33 Days
Daily		  
08-Mar-23 10:00 08-Mar-23 14:00 ALTALINK Outage 250p 11 (250p Bighorn Plant) maintenance 4 Hours
Daily		  
08-Mar-23 10:00 09-Mar-23 16:00 ATCO TE 815s Goodfare 815s 144kV breaker, PRC aux trip relay testing 30 Hours
Daily		  
08-Mar-23 10:00 08-Mar-23 16:00 ATCO TE 780s Lubicon 780S 144kV breaker relay testing 6 Hours
Continuous		  
08-Mar-23 10:00 09-Mar-23 17:00 ALTALINK Outage 535s T1 (535s Joffre) customer bus maintenance 31 Hours
Continuous		  
08-Mar-23 10:30 08-Mar-23 16:00 ATCO Outage 780s 704 (780s Lubicon) PRC- 005 trip coil testing, breaker maintenance 5.5 Hours
Continuous		  
08-Mar-23 12:00 08-Mar-23 17:00 ALTALINK TE 252s RTU/SCADA (252s Jarrow) confirm the new 3.3 EMS connects to sites in the field 5 Hours
Daily		  
09-Mar-23 08:00 10-Mar-23 18:00 ENMAX, ALTALINK Outage 1109L (SS-25 - SS-65), 1109L (SS-25 - SS-65) HV SW Maint. SW139, SW140, MD-1109 1.42 Days
Continuous		  
09-Mar-23 08:00 10-Mar-23 18:00 ALTALINK IO 1109L(C25s-C65s) Enmax Outage (Info Only switch maintenance 1.42 Days
Continuous		  
09-Mar-23 08:00 09-Mar-23 17:00 ALTALINK Outage 1072L(103s-205s) GOI, 1072L (103s Goose Lake - 205s Castle Rock Ridge) Replace insulator on top phase jumper string on structure 18. 9 Hours
Daily		  
09-Mar-23 08:00 09-Mar-23 17:00 ALTALINK RB 994L (103s Goose Lake - 312s Fidler) replace insulator on top phase jumper 9 Hours
Daily		  
09-Mar-23 08:00 09-Mar-23 17:00 ALTALINK TE 258s - Relays PRC Maintenance, redundant protection remains in service: 862L B8862L A87/L2 7SD511, 862L B87/21/L2 SEL311L Non-redundant: 862L 77/L2 SEL2411- Out of service for less than 4 hours. 9 Hours
Continuous		  
09-Mar-23 08:00 09-Mar-23 17:00 ALTALINK TE 356s Relay standard relay maintenance, redundant protections in place at all time 9 Hours
Daily		  
09-Mar-23 08:00 09-Mar-23 17:00 ALTALINK TE 71s - Relays PRC Maintenance - Relays are non redundant will be out of service less than 4 hours. 861L 77/85/L5 SEL2411 S452 96/25SC/79/452 URC60 S1652 96/25SC/79/1652 URC60 9 Hours
Daily		  
09-Mar-23 08:00 31-Mar-23 17:00 ATCO TE 2005S Substation RTU Upgrade RTU and HMI programs @ 2005S Secord
Loss of SCADA visibility and control @ 2005S during RTU downloads (5-10 minutes); possibly more than one download may be needed		 22.33 Days
Continuous		  
09-Mar-23 08:00 09-Mar-23 13:00 ALTALINK Outage 33s 2 (33s Spray) maintenance 5 Hours
Daily		  
09-Mar-23 09:00 09-Mar-23 16:00 ALTALINK TE 356s (170 & 182 RAS) - Relays Techs to remove A67/170RAS/182RAS & B67/170RAS/182RAS one at a time for settings changes. Redundant protection to remain in service at all times. 7 Hours
Daily		  
09-Mar-23 09:00 09-Mar-23 13:00 ATCO TE Bridge Creek_S-Telecom Outage of approx 4 hours
impact to the following traffic:

TPRCP080 / 7LA33B - Big Mountain / Canadian Hydro
TPRCP083 / 7LA33A - Big Mountain / Canadian Hydro
TPRCP082 / 7L33A - Big Mountain / Flyingshot
TPRCP085 / 7L33B - Big Mountain / Flyingshot
SUPCP010 BRIDGECREEK SUB SCADA		 4 Hours
Continuous		  
09-Mar-23 10:00 09-Mar-23 14:00 ALTALINK Outage 250P 2 (250P Bighorn Plant) maintenance 4 Hours
Daily		  
09-Mar-23 10:00 09-Mar-23 14:00 ATCO TE Cheecham_T-Telecom Approx 2 hour outage to the following:
SUPEP128 QUIGLEY SUB SCADA
SUPEP029 ENGSTROM SUB SCADA
TPRFF124 KETTLE RIVER / KINOSIS
SUPEP124 KINOSIS SUB SCADA
TPRCP012 / 9L85 A KINOSIS / SALT CREEK
SUPEP031 MEADOW CREEK SUB SCADA
TPRFT004 / 9L55 A / 1085L A MCMILLAN / ROUNDHILL (AML)
MOBEP049 CHEECHAM TOWER MOBILE RADIO

TPRFF 124 is for the 9L45 LTO signal for Long Lake anti-islanding APS. As there is no concurrent outage on 9L85, 9L45 or 9L990, the risk of losing the signal is low. Also loss of telecom will not activate the APS.		 4 Hours
Continuous		  
09-Mar-23 10:00 09-Mar-23 14:00 ALTALINK IO Cheecham Telecom - Atco info Cheecham tower SAR chassis replacement 4 Hours
Daily		  
10-Mar-23 08:00 10-Mar-23 18:00 ENMAX, ALTALINK Outage 1109L (SS-25 - SS-65), 1109L (SS-25 - SS-65) Summer Substation Washing 10 Hours
Continuous		  
10-Mar-23 08:00 10-Mar-23 17:00 ALTALINK Outage 940L(120s-370s) GOI, 940L (120s Picture Butte - 370s North Lethbridge) Replace Insulators on structure 27 9 Hours
Daily		  
10-Mar-23 08:00 10-Mar-23 17:00 ALTALINK RB 1041L (370s North Lethbridge - 554s Travers) replace insulators on 940L27 (1041L254) shared structure 9 Hours
Daily		  
10-Mar-23 09:00 11-Mar-23 12:00 ATCO, TRANSCANADA, CGE TE ATCO Radio Tower, 679s RTU/SCADA (679s Bear Creek), 758s RTU/SCADA (758s GPEP-S1), 845s RTU/SCADA (845s Big Mountain) replace Big Mountain SAR chassis and upgrade IRU fw facing Bridge Creek.
27 Hours
Continuous		  
10-Mar-23 09:30 10-Mar-23 17:30 ATCO TE 802s 702T (802s Michichi Creek) replace beckwith tap changer controller on 702T 8 Hours
Continuous		  
10-Mar-23 09:30 10-Mar-23 17:30 ATCO TE 802s 701T (802s Michichi Creek) update settings on the TM/701T relay 8 Hours
Continuous		  

Prepared On:   2023-03-01   14:46:18

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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