Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2021-04-24

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
ATCO 24-Jan-20 08:00 03-May-21 16:00 465.29 Days
Continuous		 2029s ACF13 (2029s Heathfield) forced outage repairs  
ALTALINK 12-Mar-21 15:00 07-May-21 17:00 56.04 Days
Continuous		 320p 6A (320p Keephills), 320p 7A (320p Keephills) replacement of 320p852 and work on 320p589  
Syncrude 12-Apr-21 08:00 26-Apr-21 20:00 14.5 Days
Continuous		 UE-1 7201 (UE-1 Syncrude Plant 30-2), UE-1 7202 (UE-1 Syncrude Plant 30-2), UE-1 7203 (UE-1 Syncrude Plant 30-2), UE-1 7204 (UE-1 Syncrude Plant 30-2) maintenance  
ALTALINK 12-Apr-21 09:30 30-Apr-21 17:30 18.33 Days
Continuous		 71s 1352 (71s Lamoureux), 71s 1452 (71s Lamoureux), 997L (71s Lamoureux - 410s Josephburg) structure install, conductor tie in, OPGW installation  
ENMAX 19-Apr-21 08:00 30-Apr-21 16:00 11.33 Days
Continuous		 162.1TR, 162.1TR (162s Beddington) Online Monitoring Installation. Install a new tap changer controller (DEV 90) and test/commission.  
CNRL 22-Apr-21 07:30 01-May-21 18:00 9.44 Days
Continuous		 842s 75-TR-5701 (842s Horizon Upgrading) transformer maintenance  
CNRL 23-Apr-21 07:30 30-Apr-21 18:00 7.44 Days
Continuous		 75-PLH-902 (838s Horizon Mining - 849s Joslyn), 75-PLH-904 (838s Horizon Mining - 842s Horizon Upgrading) 260 kV MOD, CT and CVT maintenance and bus maintenance  
ALTALINK 23-Apr-21 08:00 24-Apr-21 19:00 1.46 Days
Continuous		 254s T1 (254s Coaldale) replacement of existing T1 transformer protections  
ALTALINK 23-Apr-21 08:00 29-Apr-21 17:00 6.38 Days
Continuous		 310p 1752 (310p Sundance), 310p 1852 (310p Sundance), 310pT35 (310p Sundance) replacement bus differential protection for ST5/6B bus  
EPCOR, ALTALINK 24-Apr-21 06:00 25-Apr-21 20:00 1.58 Days
Continuous		 747L @ 37S, Inland, 99S, 747L (37s North Calder - 711L tap), 747L (99s North St. Albert - 711L tap), 711L (Inland Cement - 747L tap) Needed to retrofit 711L4 and breaker Maint  
ALTALINK 24-Apr-21 07:30 24-Apr-21 10:30 3 Hours
Daily		 277s2187X - Advice, 277s 2187X (277s Hayter) Modifying settings and verifying trip circuit from 87/138B2  
CNRL 24-Apr-21 07:30 01-May-21 18:30 7.46 Days
Continuous		 842s 75-TR-7701 (842s Horizon Upgrading) transformer maintenance  
Syncrude 24-Apr-21 08:00 25-Apr-21 20:00 1.5 Days
Continuous		 UE-1 7204 (UE-1 Syncrude Plant 30-2), UE-1 7205 (UE-1 Syncrude Plant 30-2) Non-Significant Outage:

UE-1 Subststation

Following Circuit Breakers wil be operated:
1509 (UE-1 Subst.)
52-7204 (UE-1 Subst.)
52-7205 (UE-1 Subst.)

Following Switches will be operated:
72-09 (UE-1 Subst.)
72-14 (UE-1 Subst.)
72-15 (UE-1 Subst.)		  
ALTALINK 24-Apr-21 10:30 24-Apr-21 13:30 3 Hours
Daily		 277s464 - Advice, 277s 464 (277s Hayter) Modifying settings and verifying trip circuit from 87/138B2  
ENMAX, ALTALINK 25-Apr-21 08:00 25-Apr-21 16:00 8 Hours
Continuous		 21.80L. 20.82L. 50L. 21.4TR. 21.1TR. 21.2TR. 21CAP., 21.80L (42s Sarcee - ENMAX 21), 20.82L (ENMAX 20 - ENMAX 21), 50L (44s Bearspaw Plant - ENMAX 21), 21.4TR (ENMAX 21), 21.1TR (ENMAX 21), 21.2TR (ENMAX 21), 21.1C (ENMAX 21) HV SW maint SW86  
EPCOR 26-Apr-21 07:00 30-Apr-21 17:00 4.42 Days
Continuous		 TX1 and CD2406 @ CastleDowns E557S, 557s T1 (557s Castle Downs), 557s CD2406 (557s Castle Downs) TX1 Doble, TX1 Tap Changer Maintenance, CD2406 maintenance  
ALTALINK 26-Apr-21 10:00 26-Apr-21 12:00 2 Hours
Daily		 17s57 (17s11) - Advice, 17s 11 (17s Benalto) Trip test 17s11 required for 900L (17s-63s Protection replacement)  
ALTALINK 26-Apr-21 10:30 29-Apr-21 18:00 3.31 Days
Continuous		 62s T5 - GOI, 62s T5 (62s Brazeau) Transformer maintenance including doble, oil leak repairs, LAs  
ALTALINK, EPCOR 26-Apr-21 12:00 30-Apr-21 18:00 4.25 Days
Continuous		 1045L (310p-320p-E805s) - GOI, 1045L (310p Sundance - 320p Keephills - 805s Jasper) Component Replacements 1045L Str's Range 1-175 See Also 272816 909L R/B required due to proximity.  
ALTALINK 26-Apr-21 12:30 26-Apr-21 14:30 2 Hours
Daily		 17s26 (17s6) - Advice, 17s 6 (17s Benalto) Trip test 17s6 required for 900L (17s-63s Protection replacement)  
ALTALINK 26-Apr-21 13:15 02-May-21 17:45 6.19 Days
Continuous		 121s T5 (Tx 18407) GOI, 121s T5 (121s Brooks) Replacing T5 * 25 kV Bushings, fixing transformer leak and maintaining TC  
ALTALINK 26-Apr-21 15:00 26-Apr-21 17:00 2 Hours
Daily		 17s29 (17s7) - Advice, 17s 7 (17s Benalto) Trip test 17s7 required for 900L (17s-63s Protection replacement)  
ALTALINK 27-Apr-21 07:45 28-Apr-21 16:45 1.38 Days
Continuous		 121s 25kV BUS 1 GOI, 121s T5 (121s Brooks) Replace 25kV PT’s (PT4).  
ALTALINK 27-Apr-21 09:00 27-Apr-21 11:00 2 Hours
Daily		 17s31 (17s1) - Advice, 17s 1 (17s Benalto) Trip test 17s1 required for 900L (17s-63s Protection replacement)  
ALTALINK 27-Apr-21 11:30 27-Apr-21 13:30 2 Hours
Daily		 17s T3 (17s46) - Advice, 17s T3 (17s Benalto) Trip test 17s2852 required for 900L (17s-63s Protection replacement)  
ALTALINK, MONTANA 28-Apr-21 07:00 28-Apr-21 18:00 11 Hours
Daily		 120s 240kV Bus1 and 941L GOI, MATL (120s Picture Butte - Montana) Taking advantage of 1201L outage… the following maintenance items will be completed; RTU outage as needed to complete alarm checks to ACC and timer modification as needed… station will be out, Complete M120s1352 trip coil monitor alarm, Relay PMs for site… operating lockouts… operating remote tripping to US side as required, 914L end to end checks… tripping of remote end breakers and Line Maintenance on 941L Issue to: James Sharun (REG)/Steve Predinchuk (K-Line) Contact #: 780 819-4987/403 836-4471 AB-MATL
ALTALINK 28-Apr-21 07:00 28-Apr-21 18:30 11.5 Hours
Daily		 190L (320P - 17s) - GOI, 190L (17s Benalto - 320p Keephills) New C60 breaker fail trip testing on breaker 552, commissioning C60 from L12 'A' and 'B' protections, and cutting new 652 status contacts into 320p389.  
MONTANA 28-Apr-21 07:00 30-Apr-21 18:00 2.46 Days
Daily		 MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
ALTALINK 28-Apr-21 07:00 30-Apr-21 18:00 2.46 Days
Daily		 1201L (520s - B2s) GOI, 1201L (520s Bennett - BCH Cranbrook) 1201L X-rays Str's 11-22. AB-BC
ATCO 28-Apr-21 09:00 29-Apr-21 16:00 31 Hours
Continuous		 888S 919, 888S 919C, 888S 919CPT, 888S 919CPTX, 888S 919CPTY, 888s 919C (888s Dover), 888s 919 (888s Dover) RTXP TEST SWITCH RECALL (REPLACEMENT)  
ALTALINK, MONTANA, ENBRIDGE 29-Apr-21 07:00 29-Apr-21 18:00 11 Hours
Daily		 120s 240kV Bus1 GOI, 120s 1052 (120s Picture Butte), 120s 152 (120s Picture Butte), 120s 452 (120s Picture Butte), 120s MATL PST (120s Picture Butte) Taking advantage of 1201L outage… the following maintenance items will be completed; RTU outage as needed to complete alarm checks to ACC and timer modification as needed… station will be out, Complete M120s1352 trip coil monitor alarm, Relay PMs for site… operating lockouts… bus relay tripping to breakers in 120s. Issue to: James Sharun (REG) Contact #: 780 819-4987 AB-MATL
ALTALINK, ENBRIDGE 30-Apr-21 07:00 30-Apr-21 18:00 11 Hours
Daily		 120s Station GOI, 120s MATL PST (120s Picture Butte) Taking advantage of 1201L outage… the following maintenance items will be completed; Rising Edge, RTU outage as needed to complete alarm checks to ACC and timer modification as needed… station will be out, Complete M120s1352 trip coil monitor alarm, Relay PMs for site… operating lockouts, AC station service outage during this outage to inspect ATS and clean all secondary disconnects. Issue to: James Sharun (REG) Contact #: 780 819-4987, AB-MATL
ENMAX, ALTALINK 01-May-21 08:00 03-May-21 16:00 2.33 Days
Continuous		 7.82L, 7.82L (42s Sarcee - ENMAX 7) WCRR DB2 CHANGE - 1110 101 ST SW - ANCHOR MODIFICATION  
EPCOR 03-May-21 07:00 07-May-21 17:00 4.42 Days
Continuous		 TX2 and C2405 @ CloverBar E987S, 987s T4 (987s Clover Bar), 987s T2 (987s Clover Bar) TX2 Doble, TX2 Zone CVT Doble, C2405 maintenance, CDS1/CDS31/CDS33/CDS34/CDS39 maintenance  
ALTALINK 03-May-21 07:30 07-May-21 16:30 4.38 Days
Continuous		 511s AC Filter Bus #1 - GOI, 511s 5352 (511s Crossings), 511s 5252 (511s Crossings), 511s ACF12 (511s Crossings), 511s ACF13 (511s Crossings), 511s ACF11 (511s Crossings), 511s SVC Plus (511s Crossings) Protection wiring Changes, Annual Filter Bank outage, AC Disconnect Maintenance  
ALTALINK 03-May-21 08:00 03-May-21 15:00 7 Hours
Daily		 608AL (528s Blue Trail Wind Farm - 608L tap) maintenace  
ENMAX 03-May-21 08:00 03-May-21 16:00 8 Hours
Continuous		 25B240-D131, 25B240-D131 (ENMAX 25) HV Breaker maintenance 25B240-D131.  
CMH 03-May-21 08:00 08-May-21 16:00 5.33 Days
Continuous		 T14 (MH69s-1 Power Plant Switchyard) rung T14/T5R north T14 segment upgrade phase 4B.1  
ENMAX 03-May-21 08:00 14-May-21 16:00 11.33 Days
Continuous		 162.2TR, 162.2TR (162s Beddington) Online Monitoring Installation. Install a new tap changer controller (DEV 90) and test/commission.  
ATCO 03-May-21 08:00 17-May-21 17:00 14.38 Days
Continuous		 9L20, 755S 901, 755S 901A, 755S 901PT, 755S 906, 755S 9L20 CHANNEL B TP FAIL, 755S 9L20 CHANNEL C TP FAIL, 755S 9L20 Protection Relay, 9L20 (755s Cordel - 766s Nevis), 755s 901 (755s Cordel), 755s 906 (755s Cordel) Protection upgrade to 9L20, replace 901CT at 755s Cordel.  
ALTALINK 03-May-21 08:15 06-May-21 15:45 3.31 Days
Continuous		 1083L (63s - 288s) GOI, 1083L (63s Red Deer - 288s Wolf Creek) Replacement of existing switch 63s1083 like for like.  
ALTALINK, ATCO 03-May-21 09:00 05-May-21 16:30 2.31 Days
Continuous		 13s50 (9L961) – GOI, 9L961 (13s Deerland - 825s Whitefish Lake) Replace 13s50 (CVT10) JB  
ATCO 03-May-21 09:00 07-May-21 16:00 4.29 Days
Continuous		 801S 907, 801s 907 (801s Anderson) 907 Breaker Maintenance  
ATCO 03-May-21 09:30 07-May-21 16:15 4.28 Days
Continuous		 9L09 (849s Joslyn Creek - 888s Dover), 888s 904 (888s Dover), 888S 904 Recloser, 888S 904B, 888s 905 (888s Dover), 888S 905 Recloser, 888S 905A RTXP Switch Replacements 9L09. Breaker Maintenance 904, 905, PRC005 work  
ALTALINK, EPCOR 03-May-21 12:00 07-May-21 18:00 4.25 Days
Continuous		 1045L (310p-320p-E805s) - GOI, 1045L (310p Sundance - 320p Keephills - 805s Jasper) Component Replacements 1045L Str's Range 1-175 See Also 272818 909L R/B required due to proximity.  
ALTALINK 03-May-21 12:00 07-May-21 18:00 4.25 Days
Continuous		 19s T10 (Tx 18371) - GOI, 19s T10 (19s Wabamun) T10 Maintenance, doble, DC Ground, Fan Blade missing, H3 Indicator, Insulator Feet required, Rad plugged, TC Buck/Boost  
ATCO 03-May-21 12:00 10-May-21 12:00 7 Days
Continuous		 7L64, 7L64 (779s Chinchaga River - 789s Keg River) Changing Crossarms  
ALTALINK 03-May-21 12:30 06-May-21 17:30 3.21 Days
Continuous		 89s352 - GOI, 89s 352 (89s Ellerslie) Replace grading capacitors. Breaker maintenance including 1st trip testing. Top up oil & shim breaker.  
ATCO 04-May-21 04:30 11-May-21 18:00 7.56 Days
Continuous		 859s 701T (859s Primrose), 859s 701 (859s Primrose), 859s 704 (859s Primrose) 701T XFMR Maintenance Test
701 Circuit Breaker PRC-005 Test
704 Circuit Breaker PRC-005 Test
 
ALTALINK 04-May-21 07:00 07-May-21 18:00 3.46 Days
Continuous		 801L (358s-445s-801L302) - GOI, 801L (358s Amoco Brazeau - 801AL), 801AL (445s Elk River - 801L tap) Maintenance structure 310, 312, and 314.  
ENMAX 04-May-21 08:00 04-May-21 16:00 8 Hours
Continuous		 25B240-D141, 25B240-D141 (ENMAX 25) HV Breaker maintenance  25B240-D141  
ENMAX, ALTALINK 04-May-21 08:00 05-May-21 18:00 1.42 Days
Continuous		 28.80L. 28.2TR. 28PT138-Z31, 28.80L (42s Sarcee - ENMAX 28), 28.2TR (ENMAX 28) ECI bushing replacements. Bus outage required to change bushings.  
ALTALINK 04-May-21 09:30 06-May-21 14:30 2.21 Days
Continuous		 17s C1 - GOI, 17s C1 (17s Benalto) 17s16 move control, indication, various breaker and cap bank alarms  
ALTALINK 05-May-21 07:00 05-May-21 15:00 8 Hours
Daily		 608L (418s Ardenville - 608L tap) maintenance  
ALTALINK 05-May-21 07:00 11-May-21 17:00 6.42 Days
Continuous		 61s 138kV Bus 2 (T2 & 202L) - GOI, 202L (61s Lodgepole - 62s Brazeau) Replacing 61s9, 61s10 & 61s11  
ALTALINK 05-May-21 07:45 05-May-21 17:45 10 Hours
Daily		 132s44 GOI, 132s 44 (132s Ware Junction) Breaker trouble repair  
ENMAX 05-May-21 08:00 05-May-21 16:00 8 Hours
Continuous		 25B240-D136, 25B240-D136 (ENMAX 25) HV Breaker maintenance 25B240-D136  
ALTALINK 05-May-21 10:31 05-May-21 12:30 119 Mins
Daily		 121s23N GOI, 121s 23N (121s Brooks) 23LN OOS to update Protection IP addressing.  
ALTALINK 06-May-21 07:00 06-May-21 17:00 10 Hours
Daily		 13s 138kV Bus – GOI, 13s T2 (13s Deerland), 808L (13s Deerland - 171s Redwater), 815L (13s Deerland - 127s Bruderheim) Replace 13s JBDC3 with new junction box. DC from the JB supplies 13s101, 13s452, 13s152, 13s552, 13s808N and 13s815W.  
ALTALINK 06-May-21 07:45 06-May-21 15:45 8 Hours
Daily		 132s55 GOI, 132s 55 (132s Ware Junction) Replace W P Heater  
ENMAX 06-May-21 08:00 06-May-21 16:00 8 Hours
Continuous		 25B240-D133, 25B240-D133 (ENMAX 25) HV Breaker maintenance 25B240-D133  
EPCOR, ALTALINK 07-May-21 07:00 10-May-21 17:00 3.42 Days
Continuous		 1055L, 1055L (629s Argyll Transfer - 816s Petrolia) Line Maintenance  
ENMAX, ALTALINK 07-May-21 08:00 07-May-21 18:00 10 Hours
Continuous		 23.80L. 23.4TR, 23.80L (74s Janet - ENMAX 23), 23.4TR (ENMAX 23) SW 84 at 23 sub Hot spot - South phase blade/jaw. SW 88 - 23 sub - west phase - sw to riser - line side connection  
BCH 07-May-21 09:00 07-May-21 17:00 8 Hours
Continuous		 1L274 (1D2L274 - 1D3L274) marker ball installation AB-BC
ATCO 07-May-21 16:20 10-May-21 16:15 3 Days
Continuous		 9L74 (888s Dover - 960s Birchwood Creek), 888s 905 (888s Dover), 888S 905 Recloser, 888S 905B, 888s 906 (888s Dover), 888S 906 Recloser, 888S 906A RTXP Switch Replacements 9L74. Breaker Maintenance 906, PRC005 work  
SUNCOR 08-May-21 08:00 23-May-21 18:00 15.42 Days
Continuous		 29EDD-1, 29EDD-1 T1 (29EDD-1 Millennium) 29EDD1 (South Bus) Preventative Maintenance for

- 29EDD-1T1 + Relays + Meter + IR windows, 29EDD-1S1452, Tap Changer

- X72B1 + Relays, 29EDD-1S24/1S32/1S40, 29CVT-16A/B/C, 29PVT-2A/B/C + Disconnect/Fuse, 29EDD-1S1852 + CT's

- X260B2 + Relays, 1S16, 1S20, 1S23, 29CVT-14A/B/C, PVT2 Panel, 1S1052 + Relays

- 29EDD1S852, 29CT-7A/B/C

- X260B1 + Relays, 29PT-167/168/169, 29PS-75/77/161, 1S12, 1S15, 29CVT-12, 1S6, 1S652, 1S352, 952-103/106

- 29CVT-1A/B/C, 29EDD-1S2/3/252 + Relay, 29PLA180A/B/C, 29EDD1SPL9-2 + Relay + Meter		  
ALTALINK 08-May-21 08:15 25-May-21 14:45 17.27 Days
Continuous		 275sT1 (Tx 18457) GOI, 275s T1 (275s Jenner) Isolation of T1 Tx 18457 to install new bus paralleling reactor for dual secondaries Removal of AMI feed for Bus # 4  
Syncrude 09-May-21 08:00 17-May-21 20:00 8.5 Days
Continuous		 UE-1 7204 (UE-1 Syncrude Plant 30-2), UE-1 7205 (UE-1 Syncrude Plant 30-2) Non-Significant Outage:

UE-1 Subststation

Following Circuit Breakers wil be operated:
1509 (UE-1 Subst.)
52-7204 (UE-1 Subst.)
52-7205 (UE-1 Subst.)


Following Switches will be operated:
72-09 (UE-1 Subst.)
72-14 (UE-1 Subst.)
72-15 (UE-1 Subst.)		  
EPCOR 10-May-21 07:00 14-May-21 17:00 4.42 Days
Continuous		 C2402 @ CloverBar E987S, 987s C2402 (987s Clover Bar) C2402 maintenance and Doble  
EPCOR 10-May-21 07:00 16-May-21 17:00 6.42 Days
Continuous		 Poundmaker S/S Tx2 Bay Outage, T2 (Poundmaker) Civil work for Tx4 addition  
ALTALINK 10-May-21 07:30 14-May-21 16:30 4.38 Days
Continuous		 511s AC Filter Bus #2 - GOI, 511s 5052 (511s Crossings), 511s 4952 (511s Crossings), 511s ACF21 (511s Crossings), 511s ACF22 (511s Crossings) Protection wiring Changes, Annual Filter Bank outage, AC Disconnect and Grounding switch Maintenance, exchange 511s77 K3 relay  
ENMAX 10-May-21 08:00 10-May-21 16:00 8 Hours
Continuous		 25B240-D134, 25B240-D134 (ENMAX 25) HV Breaker maintenance 25B240-D134  
ALTALINK, Lethbridge 10-May-21 08:00 14-May-21 16:00 4.33 Days
Continuous		 824L (593s Lethbridge Lakeview - 618s Riverbend) air break function test and maintance
 
ALTALINK 10-May-21 08:15 10-May-21 13:45 5.5 Hours
Daily		 74s 240kV B2 Bus GOI, 74s T2 (74s Janet), 929L (74S Janet - 287s Hazelwood) Creating open point 'A' in 240kV B2 Bus.  
BCH 10-May-21 09:00 13-May-21 11:00 3.08 Days
Continuous		 1L275 (799s Coleman - Natal) structure replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ATCO 10-May-21 11:00 11-May-21 14:00 27 Hours
Continuous		 939s 903T (939s Livock), 9L10 (876s Brintnell - 939s Livock) Foundation heaving has created a problem with the Flexible bus connected to 900D1 and 9L10D1. GOI is required to replace risers to limit the tension on the porcelain switch stacks.  
ATCO 10-May-21 11:00 13-May-21 17:00 3.25 Days
Continuous		 827S 703T, 827S SVC, 827s 703T (827s Cranberry Lake), 827s SVC (827s Cranberry Lake) 703T, 401, SVC main  
ALTALINK, EPCOR 10-May-21 12:00 14-May-21 18:00 4.25 Days
Continuous		 1045L (310p-320p-E805s) - GOI, 1045L (310p Sundance - 320p Keephills - 805s Jasper) Component Replacements 1045L Str's Range 1-175 See Also 272820 909L R/B required due to proximity.  
ALTALINK 10-May-21 12:00 20-May-21 14:00 10.08 Days
Continuous		 74s352, 74s252 (929L) GOI, 929L (74S Janet - 287s Hazelwood), 74s 252 (74s Janet), 74s 352 (74s Janet) Replace 138kV switches 3N and 3X.  
ALTALINK 10-May-21 13:00 14-May-21 17:00 4.17 Days
Continuous		 410s T1 TX18134, 410s T1 (410s Josephburg) T1 Maintenance, doble, standoffs, oil leaks, and bushing replacement  
ENMAX 11-May-21 08:00 11-May-21 16:00 8 Hours
Continuous		 25B240-D135, 25B240-D135 (ENMAX 25) HV Breaker maintenance 25B240-D135  
ALTALINK 11-May-21 08:15 15-May-21 15:45 4.31 Days
Continuous		 914L (63s - 87s) GOI, 914L (63s Red Deer - 87s Gaetz) Replacement of existing CVT 63s59  
ALTALINK, ATCO 11-May-21 09:00 13-May-21 16:30 2.31 Days
Continuous		 13s52 (9L960) – GOI, 9L960 (13s Deerland - 825s Whitefish Lake), 13s 1752 (13s Deerland), 13s 1652 (13s Deerland) Replace 13s52 (CVT12) JB  
ALTALINK, EPCOR 15-May-21 07:00 16-May-21 17:00 1.42 Days
Continuous		 1056L (89s Ellerslie - 629s Argyll Transfer Station) Line Maintenance  
ALTALINK 15-May-21 08:15 16-May-21 15:45 31.5 Hours
Continuous		 368s 138kV Bus2 (T2, C1, C2, 612L, 722L), 612L (336s Fincastle - 368s Burdett), 722L (107s Westfield - 368s Burdett) install/commission new protections (rattlesnake ridge)  
ALTALINK 16-May-21 06:15 16-May-21 17:45 11.5 Hours
Continuous		 914L (63s - 87s) GOI, 914L (63s Red Deer - 87s Gaetz) Replacement of existing CVT 63s36  
ATCO 17-May-21 08:30 21-May-21 16:00 4.31 Days
Continuous		 888S 916, 888S 916R, 888s 916 (888s Dover), 888s 916R (888s Dover) RTXP Switch Replacements, Leak mitigation on 916R, Breaker maintenance 916, PRC005 work  
ATCO 17-May-21 09:00 04-Jun-21 15:30 18.27 Days
Continuous		 757S 704, 757S 704B, 757S 704PT, 757s 704 (757s Battle River) Battle river side of 704T.  
ALTALINK 17-May-21 10:00 03-Jun-21 18:00 17.33 Days
Continuous		 12s T1 (Tx 18823, 18824, 18825) - GOI, 12s T1 (12s Heartland) Internal inspection and repair of the clamp ground insulation system  
ALTALINK 17-May-21 11:30 20-May-21 17:30 3.25 Days
Continuous		 102s T4(Tx18804) and SVC GOI, 102s SVC (102s Langdon), 102s T4 (102s Langdon) 4 year SVC and T4 maintenance  
ALTALINK, EPCOR 17-May-21 12:00 21-May-21 18:00 4.25 Days
Continuous		 1045L (310p-320p-E805s) - GOI, 1045L (310p Sundance - 320p Keephills - 805s Jasper) Component Replacements 1045L Str's Range 1-175 See Also 272822 909L R/B required due to proximity.  
ATCO 17-May-21 15:00 18-May-21 17:00 26 Hours
Continuous		 755S 902, 755s 902 (755s Cordel) Test and operate for protection upgrade work done during 9L20.
This work will take place once 9L20 has been restored to service under GOI 2-54984		  
EPCOR, ALTALINK 18-May-21 07:00 19-May-21 17:00 1.42 Days
Continuous		 TX1 and 1059L @ East Industrial E52S and East Edmonton 38S and Lambton E803S, 1059L (38s East Edmonton - 803s Lambton), 1059AL (52s East Industrial - 1059L tap), 52s T1 (52s East Industrial) TX1 Tap Changer Maintenance, 1059L CT and Arrestor Doble, EDS1 Maintenance  
SUNCOR 18-May-21 08:00 24-May-21 18:00 6.42 Days
Continuous		 29PL7-2 (29EDD-18 - 29EDD-63) Maintenance and testing of 29PT-179 and 30PT-219, 144 kV breakers/switches, GCB and PRC-005 testing  
ALTALINK 18-May-21 08:30 18-May-21 17:00 8.5 Hours
Daily		 602s2082N – GOI, 602s 2082N (602s Cold Creek) Complete Fortis requested wiring and settings changes on 602s2082N. Open Advice & alternate T1 & T2 settings via maintenance switch to avoid arc flash hazard in switchgear building.  
ALTALINK 18-May-21 09:00 18-May-21 12:30 3.5 Hours
Daily		 13s1652 – GOI, 13s 1652 (13s Deerland) Maintenance on 13s1652 including 1st trip testing. Fix bent pallet switches  
ATCO 18-May-21 10:00 20-May-21 16:00 2.25 Days
Continuous		 Paintearth_S-Telecom, Cordel_S-Telecom, Battle River_72kV-Telecom 1757, Strome_T-Telecom 4 Separate outages approx 30-90 mins each will take place one at a time, to complete the necessary chassis replacements.  
ALTALINK 18-May-21 13:00 18-May-21 17:00 4 Hours
Daily		 13s1752 – GOI, 13s 1752 (13s Deerland) Maintenance on 13s1752 including 1st trip testing. Fix moisture in SF6 gauge  
ENMAX, ALTALINK 19-May-21 08:00 19-May-21 16:00 8 Hours
Continuous		 36.81L, 36.81L (44s Bearspaw - ENMAX 36) HV Breaker maintenance 36B138-36.81  
SUNCOR 19-May-21 08:00 04-Jun-21 18:00 16.42 Days
Continuous		 29EDD-1, 29EDD-1 T2 (29EDD-1 Millennium) 29EDD1 (North Bus) Preventative Maintenance for

- 29EDD-1T2 + Relays + Meter + IR windows, 29EDD-1S1152 + CT's, Tap Changer

- N72B1, 29EDD-1S57/1S52/1S53/1S1552/1S25/1S22, 29PVT-1A/B/C

- N260B2 + Relays, 29EDD-1S14 / 1S17 / 1S21 / 1S952, 29CVT-13A/B/C, 29EDD-1 Relay controller

- 29EDD-1S752, 29CT-7A/B/C

- N260B1 + Relays, 29CVT-11, 29PS-72/76. 29EDD-1S1/1S7/1S13/1S452/1S152 + Relays, 952-101/104 + Controller + Relays

- 29CVT-3, 29EDD1SPL9-1 Relays + Meter, 29CVT-3A/B/C, 29PLA-182A/B/C, 29EDD-1S8/1S552 + Relay
This bus will not be isolated until South Bus has returned to service.		  
ALBIAN, ATCO 19-May-21 09:00 19-May-21 16:00 7 Hours
Continuous		 919s 905 (919s Hartley), 9LJH-1, 9LJH1 (919s Hartley - 920s Jackpine) PRC005 Trip coil testing.
Test and operate 905		  
ALBIAN 19-May-21 09:00 19-May-21 16:00 7 Hours
Continuous		 920s 901 (920s Jackpine), 920s 901T (920s Jackpine) PRC-005 - TRIP COIL TESTING - BREAKER 901, 920S 901T OOS  
ALTALINK 19-May-21 12:30 19-May-21 16:30 4 Hours
Daily		 953L (574s - A755s) OOS, 953L (574s Nilrem - 755s Cordel) Open as part of 478s - 9465R Radio upgrade.  
ALTALINK 19-May-21 13:00 19-May-21 17:00 4 Hours
Daily		 13s1252 – GOI, 13s 1252 (13s Deerland) Maintenance on 13s1252 including 1st trip testing  
EPCOR 20-May-21 07:00 21-May-21 17:00 1.42 Days
Continuous		 TX1 @ Bellamy E814S, 814s T1 (814s Bellamy) TX1 Oil Clean Up-Inspection  
ALTALINK, EPCOR 20-May-21 08:00 20-May-21 11:30 3.5 Hours
Daily		 320p809X (809L) - GOI, 320p 809X (320p Keephills), 809L (320p Keephills - 510s Sunnybrook) New C60 breaker fail trip testing on breaker 1152 (320p809X) and commissioning 1152 BF trip to C60.  
ALBIAN, ATCO 20-May-21 09:00 20-May-21 16:00 7 Hours
Continuous		 919s 907 (919s Hartley), 9LJH-2, 9LJH2 (919s Hartley - 920s Jackpine) PRC005 Trip coil testing.
Test and operate 907		  
ALBIAN 20-May-21 09:00 20-May-21 16:00 7 Hours
Continuous		 920s 902 (920s Jackpine), 920s 902T (920s Jackpine) PRC-005 - TRIP COIL TESTING - BREAKER 902, 920S 902T OOS  
ALTALINK 20-May-21 12:45 20-May-21 18:00 5.25 Hours
Daily		 74s 240kV B2 Bus (929L) GOI, 74s T2 (74s Janet), 929L (74S Janet - 287s Hazelwood) Close open point A on 240kV B2 Bus.  
ALTALINK 20-May-21 13:00 20-May-21 17:00 4 Hours
Daily		 54s709N (709L) – GOI, 54s 709N (54s Fort Saskatchewan), 709L (54s Fort Saskatchewan - 172s Sherritt) Maintenance on 54s709N including 1st trip testing  
ALTALINK, EPCOR 21-May-21 07:30 21-May-21 17:30 10 Hours
Continuous		 1057L (89s-E657s) - GOI, 1057L (89s Ellerslie - 657s Summerside) Maintenance on structure 1057L1/908L233  
ALTALINK 21-May-21 13:00 21-May-21 15:30 2.5 Hours
Daily		 320p91 (T1) - GOI, 320p T1 (320p Keephills), 320p 91 (320p Keephills) New C60 breaker fail trip testing on breaker 952 (320p91) and commissioning 952 BF trip to C60.  
ALTALINK 24-May-21 07:00 28-May-21 18:00 4.46 Days
Continuous		 83s 138kV West bus, T1, portion of 172L, 83s Taber 138kV West Bus, 83s T1 (83s Taber), 83s 67 (83s Taber), 83s C2 (83s Taber), 610L (83s Taber - 336s Fincastle), 172L (83s Taber - 172EL tap) Taber 83s Urgent Repair - Replace 138kV switch 83s36, raise 138kV bus.  
EPCOR 25-May-21 07:00 25-May-21 17:00 10 Hours
Daily		 72kV Tie Line - Clover Bar, 987s T2 (987s Clover Bar) Line Maintenance  
EPCOR, ALTALINK 25-May-21 07:00 25-May-21 17:00 10 Hours
Continuous		 DDS4 @ Dome E665S, 665s D2402 (665s Dome), 665s D2403 (665s Dome), 665s T2 (665s Dome), 909L (310p Sundance - 665s Dome) DDS4 maintenance  
ATCO 25-May-21 07:00 04-Jun-21 15:00 10.33 Days
Continuous		 2029S ACF23, 2029s ACF23 (2029s Heathfield) Perform PRC-005 tests on all devices associated with ACF23 and breaker 1224, Filter will be unavailable, One device worked on at a time  
ALTALINK 25-May-21 07:30 25-May-21 17:30 10 Hours
Daily		 138s 240kV BUS 1 GOI, 138s Windy Flats 240kV Bus 1, 138S R1 (138s Windy Flats) 240kV Bus #1 outage to allow Change out of non-corona free connectors from 240kV Bus #1 to 138s1789 Air switch.  
ENMAX 25-May-21 08:00 28-May-21 16:00 3.33 Days
Continuous		 65.1TR, 65.1TR (ENMAX 65) GE will be replacing all the DGA tubing with insulated tubing. Oil Sampling MT, TC. Check Reversing Switch.  
ATCO 25-May-21 08:00 28-May-21 17:00 3.38 Days
Continuous		 9L953, 755S 905, 755S 905B, 755S 905PT, 755S 906, 755S 906PT, 755S 9L953 CHANNEL A TP FAIL, 755S 9L953 CHANNEL B TP FAIL, 755S 9L953 Protection Relay, 755S 9L953D1, 755S 9L953GS, 9L953 (574s Nilrem - 755s Cordel), 755s 905 (755s Cordel), 755s 906 (755s Cordel) Protection upgrade for 9L953, 906/905 Breakers. We will need to modify the wiring on 9L953D1 during this outage and test its operation during the switching back to normal at the end of the outage.  
ATCO 25-May-21 08:00 25-Jun-21 15:30 31.31 Days
Continuous		 2075S ACF2, 2075s ACF22 (2075s Newell), 2075s 910 (2075s Newell), 2075s 911 (2075s Newell), 2075s ACF24 (2075s Newell), 2075s ACF23 (2075s Newell), 2075s SVC2 (2075s Newell) PRC-005 & Filter Bank Maintenance, EATL will be limited to 750 MW, PRC testing will be also conducted on all breakers on 900BS1 (904, 916, 919, & 922) one at a time  
ATCO 25-May-21 08:30 27-May-21 16:00 2.31 Days
Continuous		 888S 907, 888s 907 (888s Dover) RTXP Switch Replacements 9L43, Breaker Maintenance on BKR 907, PRC005 work  
ALTALINK 25-May-21 09:30 28-May-21 17:30 3.33 Days
Continuous		 39s847W (847L) - Advice, 847L (39s Bickerdike - 406s Fickle Lake) Create Open Point ‘A’ to facilitate the 847L57A airbreak installation  
ALTALINK, ENMAX 25-May-21 10:15 25-May-21 17:45 7.5 Hours
Daily		 74s37.82 (37.82L) GOI, 37.82L (74s Janet - ENMAX 37), 74s 37.82W (74s Janet) Dashpot rebuild  
ATCO 25-May-21 11:00 25-May-21 15:00 4 Hours
Continuous		 813s 901T (813s Little Smoky), 813S 901TD Remove rubber covering from switch bottle actuator arms on 813S 901TD
Once complete go to GOI for 901T CT ratio change GOI # 2-56072		  
ALTALINK 25-May-21 11:30 27-May-21 14:30 2.13 Days
Continuous		 39s29 - GOI, 39s 29 (39s Bickerdike) Replace 240kV CT.  
ATCO 25-May-21 15:00 27-May-21 17:00 2.08 Days
Continuous		 813S 901T, 813s 901T (813s Little Smoky) Change CT ratio  
EPCOR 26-May-21 07:00 26-May-21 17:00 10 Hours
Continuous		 G3 Zone @ Genesee 330P, 330p 1208 (330p Genesee), 330P GT3 (330p Genesee) G3 Arrestor Doble, G3 Zone Relay Maintenance  
ALTALINK 26-May-21 09:30 27-May-21 17:30 1.33 Days
Continuous		 266s FSC1 GOI, 266s 1037L FSC (266s SC1) test and possibly change bad CT  
EPCOR, ALTALINK 27-May-21 07:00 28-May-21 17:00 1.42 Days
Continuous		 C2404 and C2406 @ Cloverbar E987S, 987s C2404 (987s Clover Bar), 987s C2406 (987s Clover Bar), 921L (71s Lamoureux - 987s Clover Bar) 240CVT 85/86/87 and C2404 Bay CT's Doble  
ATCO 28-May-21 08:30 29-May-21 16:00 31.5 Hours
Continuous		 888s 908 (888s Dover) RTXP Switch Replacements 9L43, Breaker Maintenance on 908, PRC005 work  
ALTALINK 28-May-21 17:00 10-Jun-21 08:00 12.63 Days
Continuous		 847L (39s – Open Point ‘A’) - GOI, 847L (39s Bickerdike - 406s Fickle Lake) 847L57A airbreak installation. Test energize new airbreak. (P2212)  
ALTALINK 29-May-21 08:15 30-May-21 15:45 31.5 Hours
Continuous		 368s 138kV Bus1 (T1, C1, C2, 879L) GOI, 879L (244s Bowmanton - 368s Burdett), 368s C1 (368s Burdett), 368s C2 (368s Burdett), 368s T1 (368s Burdett) install/commission new protections (rattlesnake ridge)  
ATCO 29-May-21 16:30 01-Jun-21 16:00 2.98 Days
Continuous		 9L58 (848s Ruth Lake - 888s Dover), 888s 908 (888s Dover), 888S 908 Recloser, 888S 908B, 888s 909 (888s Dover), 888S 909 Recloser, 888S 909A RTXP Switch Replacements 9L58, Breaker Maintenance on 909, PRC005 work  
ALTALINK 31-May-21 06:00 03-Jun-21 17:00 3.46 Days
Continuous		 74s 138kV North bus and T1 GOI, 74s T1 (74s Janet), 74s Janet 138kV North Bus Switch 74s17 replacement  
EPCOR 31-May-21 07:00 02-Jun-21 17:00 2.42 Days
Continuous		 1201 Bay @ Genesee 330P, 330p 1201 (330p Genesee) 1201 Maintenance and CT Doble  
EPCOR 31-May-21 07:00 02-Jun-21 17:00 2.42 Days
Continuous		 72kV Bus 3 @ Cloverbar E987S, 987s CCP7213 (987s Clover Bar), 72CK12 (987s Clover Bar - Kennedale) Bus 3 CVT Doble, CDS9/CDS14/CGDS2 maintenance  
EPCOR 31-May-21 07:00 02-Jun-21 17:00 2.42 Days
Continuous		 TX1 Zone @ Riverview, T1 (EPCOR Riverview) RWDS1 and RWDS10 adjustment, grating install, RW2401 Tank Heater repair  
EPCOR 31-May-21 07:00 05-Jun-21 17:00 5.42 Days
Continuous		 Poundmaker S/S Tx3 Bay Outage, T3 (Poundmaker) Removal of 240 kV bus work for PM2405 bay installation for WETUP project.

Tx3 to be energized from through PM2404 breaker during the restoration of this outage with 240 kV bus removed from PMDS1 to PMAB3 for the duration on PM2405 bay installation. Physical bus separation from PMDS1 to PMAB3 to remain upon Tx3 restoration.		  
EPCOR 31-May-21 07:00 11-Jun-21 17:00 11.42 Days
Continuous		 East Industrial TX2 DGA Replacement, 52s T2 (52s East Industrial) East Industrial TX2 DGA Replacement - 1007382.036969  
ALTALINK 31-May-21 07:15 03-Jun-21 14:45 3.31 Days
Continuous		 951L (275s - 132s) GOI, 951L (132s Ware Junction - 275s Jenner) repair request to replace one phase on 240kv VT9  
ENMAX, ALTALINK 31-May-21 08:00 01-Jun-21 16:00 1.33 Days
Continuous		 832L, 832L (ENMAX 10 - ENMAX 12) HV Breaker maintenance 12B138-832L  
ENMAX, ALTALINK 31-May-21 08:00 01-Jun-21 16:00 1.33 Days
Continuous		 1080L., 1080L (ENMAX 25 - ENMAX 65) 25MD240-1080 Replacement  
ALTALINK 31-May-21 08:00 08-Jun-21 13:30 8.23 Days
Continuous		 74s2152 GOI, 74s 2152 (74s Janet) Breaker replacement with SF 6  
ATCO 31-May-21 08:00 14-Jun-21 17:00 14.38 Days
Continuous		 9L16, 9L80, 755S 904, 755S 904B, 755S 905, 755S 905A, 755S 905PT, 9L16 (755s Cordel - 972s Tinchebray), 9L80 (755s Cordel - 757s Battle River), 755s 904 (755s Cordel), 755s 905 (755s Cordel) 9L16 Protection upgrade, update protection to 905 & 904 Breakers
9L80 included Initially in Outage Starting May 31 and will be restored on June 4th.		  
ATCO 31-May-21 08:30 04-Jun-21 16:30 4.33 Days
Continuous		 9L80, 757S 912T, 757S 710, 757S 912, 757S 912PT, 9L80 (755s Cordel - 757s Battle River), 757s 912T (757s Battle River), 757s 710 (757s Battle River), 757s 912 (757s Battle River) PRC005 work on 912T, 912, 910
912 Breaker Maintenance

Unit #4 shut down from May 14th - June 10th		  
ALTALINK 31-May-21 10:00 03-Jun-21 17:30 3.31 Days
Continuous		 63s2652 GOI, 63s 2652 (63s Red Deer) 240kV breaker maintenance and grading cap replacement  
ATCO 31-May-21 10:00 11-Jun-21 15:30 11.23 Days
Continuous		 840S McNeill Station, 840S 901T, 840S Station General Equipment, 840S 25kv Breaker Relays, 840s 901T (840s MCNEILLSTATION), 840s 701T (840s MCNEILLSTATION), 840s 701 (840s MCNEILLSTATION) transformer and breaker testing AB-SK
ATCO 31-May-21 11:00 04-Jun-21 17:00 4.25 Days
Continuous		 813S 902T, 813s 902T (813s Little Smoky) 902T Main. and CT ratio change  
ALTALINK 31-May-21 11:30 03-Jun-21 16:30 3.21 Days
Continuous		 39s33 - GOI, 39s 33 (39s Bickerdike) Replace 240kV CTs.  
ALTALINK 31-May-21 11:30 03-Jun-21 17:30 3.25 Days
Continuous		 83s T1 GOI, 83s T1 (83s Taber) Replace 138 kV LA’s, TC filter, 25 kV bushings, and 138 kV bushings on T1  
ATCO 31-May-21 12:00 04-Jun-21 12:00 4 Days
Continuous		 755S 903, 755s 903 (755s Cordel) Test and Operate of 903.
Protection upgrade on 9L80 during plan shut down under GOI 2-54986B. Test and operate		  
ALTALINK 31-May-21 12:00 12-Jun-21 18:00 12.25 Days
Continuous		 37s T6 (Tx 18309) - GOI, 37s T6 (37s North Calder) Maintenance, doble and leak repairs. PRC5 work.  
ATCO 31-May-21 13:00 03-Jun-21 18:00 3.21 Days
Continuous		 790S 705, 7L101, 7L101 (790s Poplar Hill - 944s Lowe Lake), 790s 705 (790s Poplar Hill) Wiring in protection for 705 Trip and Close CCT.  
ALTALINK 01-Jun-21 09:15 25-Jun-21 17:45 24.35 Days
Continuous		 879L (368s - 244s) GOI, 879L (244s Bowmanton - 368s Burdett) 879L Rebuild Str's 500-734. Line Protection upgrades at 244s/368s, as well as new T-tap connection (Rattlesnake Ridge)  
ALTALINK 02-Jun-21 07:15 02-Jun-21 17:45 10.5 Hours
Daily		 768L (217s - 209s) GOI, 768L (209s Timberlands - 217s North Red Deer) Scope of work includes maintenance on structure 49  
ENMAX, ALTALINK 02-Jun-21 08:00 03-Jun-21 16:00 1.33 Days
Continuous		 833L (1), 833L (ENMAX 2 - ENMAX 12) HV Breaker maintenance 12B138-833L and Transmission - Cables - Sheath Test - 138-833 Line XLPE  
ALTALINK 02-Jun-21 10:30 02-Jun-21 16:30 6 Hours
Daily		 89s2152 – GOI, 89s 2152 (89s Ellerslie) Maintenance on 89s2152 including 1st trip testing. 89s2152 CT leak inspect gauge  
EPCOR 03-Jun-21 07:00 04-Jun-21 17:00 1.42 Days
Continuous		 C2406 @ Cloverbar E987S, 987s C2406 (987s Clover Bar) Doble C2406 Bay CT's  
EPCOR 03-Jun-21 07:00 04-Jun-21 17:00 1.42 Days
Continuous		 240Kv Bus 3/4 @ Riverview, 1139L (367s Harry Smith - EPCOR Riverview), RW2405 (EPCOR Riverview), RW2403 (EPCOR Riverview) RWDS6/RWDS9 adjustment  
ALTALINK 04-Jun-21 07:15 06-Jun-21 17:45 2.44 Days
Continuous		 717L (262s - 17s) GOI, 717L (17s Benalto - 262s Rocky Mountain House) Scope of work includes maintenance on structures 98, 104, 107, 116 and 118  
ATCO 05-Jun-21 13:00 12-Jul-21 09:00 36.83 Days
Continuous		 730S 701T, 730S 701TCS, 730s 701T (730s Rycroft) 730S 701T TRANSFORMER CLASS2 MAJOR TESTING

Leak severity, 701T main, 701TCS main

Transformer out of service, load on 902S		  
ALTALINK 06-Jun-21 11:30 09-Jun-21 16:30 3.21 Days
Continuous		 39s26 - GOI, 39s 26 (39s Bickerdike) Replace 240kV CTs.  
EPCOR 07-Jun-21 07:00 11-Jun-21 17:00 4.42 Days
Continuous		 TX2 Zone @ Riverview, RW2402 (EPCOR Riverview), RW2403 (EPCOR Riverview), T2 (EPCOR Riverview) RWDS4/RWDS5 adjustment, grating install, TX2 dehydrator install  
EPCOR 07-Jun-21 07:00 12-Jun-21 17:00 5.42 Days
Continuous		 Poundmaker S/S Tx2 Bay Outage and PM2401 bay outage, T2 (Poundmaker) Continuation of 240 kV ring re-configuration for WETUP project. 240 kV bus to be removed from PMDS1 and PMAB3 in order to make room for PM2405 breaker bay and CVT installation.

Tx3 to be energized from through PM2404 breaker during this outage.		  
ALTALINK 07-Jun-21 07:00 17-Jun-21 18:00 10.46 Days
Continuous		 1325L (510s - 511s) - GOI, 1325L (510s Sunnybrook - 511s Crossings) Semi Annual Inspection and Maintenance, Doble T11 and Valve Hall and DC yard Inspection  
ATCO 07-Jun-21 07:00 18-Jun-21 15:00 11.33 Days
Continuous		 2029S ACF22, 2029s ACF22 (2029s Heathfield) Perform PRC-005 tests on all devices associated with ACF22 and breaker 1223, Filter will be unavailable, One device worked on at a time  
ATCO 07-Jun-21 08:30 10-Jun-21 16:00 3.31 Days
Continuous		 888S 910, 888S 910 Recloser, 888S 910B, 888S 911, 888S 911 Recloser, 888S 911A, 9L30 (888s Dover - 951s Thickwood) RTXP Switch Replacements 9L30, Breaker Maintenance on 910, 911, PRC005 work  
ATCO 07-Jun-21 12:00 17-Jun-21 12:00 10 Days
Continuous		 7L80, 7L80 (733s Simonette - 740s H.R.Milner) Climbing and walk up inspection with insulator repairs  
ALTALINK, ENMAX 08-Jun-21 07:00 12-Jun-21 16:00 4.38 Days
Continuous		 918L (281s - 162s) GOI, 918L (162s Beddington - 281s Johnson) Work on 1325L OPGW over line. Required for safety.  
ALTALINK 08-Jun-21 13:00 10-Jun-21 17:30 2.19 Days
Continuous		 74s2152 and 925L(74s - 63s) GOI, 925L (63s Red Deer - 74s Janet) Replace Breaker 74s2152 to SF6, extend GOI to replace risers from switch 21N to new breaker  
ALTALINK 10-Jun-21 07:30 10-Jun-21 17:30 10 Hours
Daily		 847L57A (847L) - Advice, 847L (406s Fickle Lake - 847AL tap) Close Open Point ‘A’ to facilitate the 847L57A airbreak installation. Energize new airbreak.  
EPCOR 14-Jun-21 07:00 16-Jun-21 17:00 2.42 Days
Continuous		 1203 Bay @ Genesee 330P, 330p 1203 (330p Genesee) 1203 Maintenance and Doble  
EPCOR, ALTALINK 14-Jun-21 07:00 18-Jun-21 17:00 4.42 Days
Continuous		 DDS12 at Dome, 665s D2404 (665s Dome), 665s T3 (665s Dome), 909L (89s Ellerslie - 665s Dome) Repair disconnect (This will isolate 72DS26 and 909L East to Ellerslie 89S)  
EPCOR 14-Jun-21 07:00 18-Jun-21 17:00 4.42 Days
Continuous		 240Kv Bus 1/2 @ Riverview, 1164L (816s Petrolia - EPCOR Riverview), RW2401 (EPCOR Riverview), RW2402 (EPCOR Riverview) RWDS2/RWDS3 adjustment, RW2402 riser repair  
EPCOR 14-Jun-21 07:00 23-Jul-21 17:00 39.42 Days
Continuous		 Poundmaker S/S Tx3 Bay Outage, T3 (Poundmaker) Continuation of 240 kV ring re-configuration for WETUP project.

Tx3 bay to be isolated for 240 kV bus re-configuration and installation of PM2405, PMDS11 and CVT's.

Upon restoration Tx3 to be energized from PM2404 and a new isolation point of PMDS11 disconnect to remain open.		  
ENMAX, ALTALINK 14-Jun-21 08:00 14-Jun-21 12:00 4 Hours
Continuous		 833L. 12.2TR. 12PT138-Z31, 833L (ENMAX 2 - ENMAX 12) Substation Summer Washing  
ATCO 14-Jun-21 08:30 15-Jun-21 17:00 1.35 Days
Continuous		 888S 911, 888S 911 Recloser, 888S 911B, 888S 912, 888S 912 Recloser, 888S 912A, 9L112 (888s Dover - 951s Thickwood), 888s 911 (888s Dover), 888s 912 (888s Dover) RTXP Switch Replacements 9L112, Breaker Maintenance on 912, PRC005 work  
ATCO 14-Jun-21 10:00 17-Jun-21 15:00 3.21 Days
Continuous		 7L32, 7L32 (813s Little Smoky - 862s South Bezanson) Crossarm changing  
ATCO 14-Jun-21 10:00 17-Jun-21 17:00 3.29 Days
Continuous		 7L28, 7L28 (717s Ethel Lake - 846s Grand Centre) Arm Changes Pole Changes Sampling Inspection Sampling Climbing inspection  
ENMAX, ALTALINK 14-Jun-21 12:00 14-Jun-21 18:00 6 Hours
Continuous		 832L (ENMAX 10 - ENMAX 12), 832L. 12.1TR. 12PT138-Z31 Substation Summer Washing  
ALTALINK 14-Jun-21 12:30 18-Jun-21 17:30 4.21 Days
Continuous		 847L236B (847L) - Advice, 847L (406s Fickle Lake - 847AL tap) Create Open Point ‘B’ to facilitate the 847L58C airbreak installation  
ALTALINK 15-Jun-21 07:15 17-Jun-21 16:45 2.4 Days
Continuous		 616L (59s-338s-103s), 616L (103s Goose Lake - 616AL tap), 616L (59s Peigan - 616AL tap), 616AL (383s Kettles Hill Windfarm - 616L tap) Scope of work includes replacing structure 56 and maintenance on structures 53 and 55  
ALTALINK 15-Jun-21 10:15 17-Jun-21 15:45 2.23 Days
Continuous		 275s8 GOI, 275s 8 (275s Jenner) 1st Trip and Maintenance PRC5  
ENMAX 15-Jun-21 14:00 15-Jun-21 16:00 2 Hours
Continuous		 35.81L, 35.81L (42s Sarcee - ENMAX 35) Substation Summer Washing  
EPCOR 16-Jun-21 07:00 18-Jun-21 17:00 2.42 Days
Continuous		 72kV Bus 4 @ Cloverbar E987S and Hardisty, 987s CC24 (987s Clover Bar), 987s CCP7214 (987s Clover Bar) Bus 4 CVT Doble, CDS10/CDS16/CSDS2/CGDS1 maintenance, HDS1 hot contact maintenance  
ATCO 16-Jun-21 08:30 17-Jun-21 17:00 1.35 Days
Continuous		 888S 901B, 888S 902, 888S 902 Recloser, 888S 902A, 888S 9L08PT, 9L08 (849s Joslyn Creek - 888s Dover), 888s 902 (888s Dover) RTXP Switch Replacements 9L08, PRC005 work  
ENMAX, ALTALINK 17-Jun-21 12:00 17-Jun-21 18:00 6 Hours
Continuous		 24.81L. 24.83L. 24.1TR. 24PT138-Z31, 24.81L (ENMAX 24 - ENMAX 31), 24.83L (74s Janet - ENMAX 24) Substation Summer Washing  
ALTALINK 18-Jun-21 11:00 14-Jul-21 18:00 26.29 Days
Continuous		 74sT2 TX18571 GOI, 74s T2 (74s Janet) Corrosive sulphur in oil. Will require the oil reclaim reclamation to remove corrosive Sulphur content in the oil.  
ALTALINK 18-Jun-21 17:00 30-Jun-21 08:00 11.63 Days
Continuous		 847L (847L236B – Open Point ‘B’) - GOI, 847L (406s Fickle Lake - 847AL tap) 847L58C airbreak installation. Test energize new airbreak.  
EPCOR 21-Jun-21 07:00 23-Jun-21 17:00 2.42 Days
Continuous		 1205 Bay @ Genesee 330P, 330p 1205 (330p Genesee) 1205 Maintenance and CT Doble  
ATCO 21-Jun-21 07:00 09-Jul-21 17:00 18.42 Days
Continuous		 2029S ACF21, 2029s ACF21 (2029s Heathfield) Perform PRC005 tests on all devices associated with ACF21, Filter will be unavailable, One device worked on at a time.  
ALTALINK, ENMAX 21-Jun-21 07:30 01-Jul-21 17:30 10.42 Days
Continuous		 74s2252 and 1003L(74s - C25s) GOI, 74s 2252 (74s Janet), 1003L (74s Janet - ENMAX 25) Breaker replacement with SF6 breaker  
ENMAX, ALTALINK 21-Jun-21 08:00 21-Jun-21 16:00 8 Hours
Continuous		 24.83L, 24.83L (74s Janet - ENMAX 24) HV Breaker maintenance 24B138-24.83. Review isolation  
ATCO 21-Jun-21 08:10 05-Jul-21 17:10 14.38 Days
Continuous		 9L27, 755S 902, 755S 902B, 755S 903, 755S 903A, 755S 903PT, 755S 9L27 CHANNEL A TP, 755S 9L27 CHANNEL B TP, 755S 9L27 Protection Relay, 755S 9L27D1, 755S 9L27GS2, 9L27 (755s Cordel - 863s Paintearth) Protection upgrade to 9L27 and breakers 902/903, Replace 903A, 9L27D1 and 903PT.  
ATCO 21-Jun-21 10:00 24-Jun-21 17:00 3.29 Days
Continuous		 7L28, 7L28 (717s Ethel Lake - 846s Grand Centre) Arm Change pole Changes Sampling Inspection  
ALTALINK 21-Jun-21 12:00 24-Jun-21 16:00 3.17 Days
Continuous		 650s T1 - GOI, 650s T1 (650s Hansman Lake) Fix leaks, maintenance, doble on T1. 650s70 maintenance  
ATCO 21-Jun-21 12:00 28-Jun-21 12:00 7 Days
Continuous		 7L80, 7L80 (733s Simonette - 740s H.R.Milner) Climbing and walk up inspection with insulator repairs  
ATCO 23-Jun-21 09:00 24-Jun-21 16:30 31.5 Hours
Continuous		 9L79, 755S 901, 755S 901B, 755S 902, 755S 902A, 755S 902B, 755S 902PT, 755S 9L79 CHANNEL A TP FAIL, 755S 9L79 CHANNEL B TP FAIL, 755S 9L79 Protection Relay, 755S 9L79D2, 755S 9L79GS2, 757S 911, 757S 911PT, 9L79 (755s Cordel - 757s Battle River), 755s 901 (755s Cordel), 755s 902 (755s Cordel), 757s 911 (757s Battle River) Protection upgrade to 9L79 relays, testing of MODs @755s. PRC005 at the 757s Batter river end on Breaker 911  
EPCOR 24-Jun-21 07:00 25-Jun-21 17:00 1.42 Days
Continuous		 12TC2 and Bus 2 @ Genesee 330P, 330P 12TC2 (330p Genesee), 330p Genesee 500 kV Bus 2 1203A/1206A/1209B/12TC2D Switch Maintenance  
BCH 25-Jun-21 09:00 25-Jun-21 17:00 8 Hours
Continuous		 1L274 (1D2L274 - 1D3L274) transformer energization AB-BC
BCH 28-Jun-21 09:00 02-Jul-21 17:00 4.33 Days
Continuous		 2L294 (A.A. Lambert - Nelway) insulator replacement AB-BC
ATCO 28-Jun-21 10:00 30-Jun-21 15:00 2.21 Days
Continuous		 7L32, 7L32 (813s Little Smoky - 862s South Bezanson) Crossarm changing  
ALTALINK 28-Jun-21 10:30 30-Jun-21 17:30 2.29 Days
Continuous		 63s452 GOI, 63s 452 (63s Red Deer) 356sPerform 1st trip then repair leaks and top up oil and maintain PRC5.  
ALTALINK 28-Jun-21 11:15 29-Jun-21 17:45 30.5 Hours
Continuous		 28s 240kV BUS 1 GOI, 28s T2 (28s West Brooks), 28s 2 (28s West Brooks), 28s 52 (28s West Brooks) Install corona mitigation fittings on the 240kV bus ends to reduce discharge noise  
ALTALINK 28-Jun-21 12:30 28-Jun-21 17:30 5 Hours
Daily		 320p352 - GOI, 320p 352 (320p Keephills) 1st trip and PRC5 maintenance, fix indicator cover, clean up rusty JB  
ALTALINK 30-Jun-21 07:15 01-Jul-21 17:45 1.44 Days
Continuous		 28s 240kV BUS 2 GOI, 28s 240kV Bus 2 (28s West Brooks) Install corona mitigation fittings on the 240kV bus ends to reduce discharge noise  
ALTALINK 30-Jun-21 07:30 30-Jun-21 17:30 10 Hours
Daily		 847L58C (847L) - Advice, 847L (406s Fickle Lake - 847AL tap) Close Open Point ‘B’ to facilitate the 847L58C airbreak installation. Energize new airbreak.  
ALTALINK 01-Jul-21 08:00 01-Jul-21 17:00 9 Hours
Continuous		 74s2252 GOI, 74s 2252 (74s Janet) Replace Breaker 74s2252, extend outage to replace risers from switch 74s22X to new breaker  
ENMAX, ALTALINK 04-Jul-21 08:00 14-Jul-21 16:00 10.33 Days
Continuous		 7.82L, 7.82L (42s Sarcee - ENMAX 7) Line relocation at 101 street. Phasing required.  
EPCOR, ALTALINK 05-Jul-21 07:00 05-Jul-21 17:00 10 Hours
Continuous		 1044L Zone @ Japser Terminal E805S and Petrolia E816S, 1044L (805s Jasper - 816s Petrolia) 1044L at Jasper Arrestor Doble  
ATCO 05-Jul-21 08:00 30-Jul-21 15:30 25.31 Days
Continuous		 2075S ACF1, 2075s 917 (2075s Newell), 2075s 918 (2075s Newell), 2075s ACF14 (2075s Newell), 2075s ACF13 (2075s Newell), 2075s ACF12 (2075s Newell), 2075s SVC1 (2075s Newell) Cooling system maintenance, LOPs  
ATCO 05-Jul-21 08:16 06-Jul-21 17:00 1.36 Days
Continuous		 755S 903, 755S 903B, 755S 904, 755S 904A, 755S 904PT, 755S 9L80 CHANNEL A TP FAIL, 755S 9L80 CHANNEL B TP FAIL, 755S 9L80 CHANNEL C TP FAIL, 755S 9L80 Protection Relay, 755S 9L80D2, 755S 9L80GS, 757S 912, 757S 9L80 CHANNEL A TP FAIL, 757S 9L80 CHANNEL B TP FAIL, 757S 9L80 CHANNEL C TP FAIL, 757S 9L80 Protection Relay, 757S 9L80D1, 757S 9L80PT, 9L80, 9L80 (755s Cordel - 757s Battle River), 755s 903 (755s Cordel), 757s 912 (757s Battle River), 755s 904 (755s Cordel) Protection upgrade to 9L80, PRC005 work must be done at 757s on breaker 912 @ this time as well.  
ALTALINK 05-Jul-21 09:00 06-Jul-21 17:30 1.35 Days
Continuous		 74s2752 GOI, 74s 2752 (74s Janet) Replace Breaker 74s2752 Grading Capacitors  
BCH 05-Jul-21 09:00 09-Jul-21 17:00 4.33 Days
Continuous		 2L294 (A.A. Lambert - Cranbrook) disconnect switch inspections AB-BC
ALTALINK 05-Jul-21 09:30 07-Jul-21 16:30 2.29 Days
Continuous		 42s928N Advice, 928L (17s Benalto - 42s Sarcee) Migrate and commission all 42s928N & L1-928L at 42s Sarcee associated line protections, recloser, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN.  
ATCO 05-Jul-21 10:00 08-Jul-21 15:00 3.21 Days
Continuous		 7L32, 7L32 (813s Little Smoky - 862s South Bezanson) Crossarm changing  
ATCO 05-Jul-21 12:00 12-Jul-21 12:00 7 Days
Continuous		 7L80, 7L80 (733s Simonette - 740s H.R.Milner) Climbing and walk up inspection with insulator repairs  
EPCOR, ALTALINK 06-Jul-21 07:00 06-Jul-21 17:00 10 Hours
Continuous		 1045L @ Jasper Terminal E805S, Keephills 320P, Sundance 310P, 1045L (310p Sundance - 320p Keephills - 805s Jasper) 1045L at Jasper CVT/Arrestor Doble  
ALTALINK 07-Jul-21 09:00 08-Jul-21 17:30 1.35 Days
Continuous		 74s2852 GOI, 74s 2852 (74s Janet) Replace Breaker 74s2852 Grading Capacitors  
ALTALINK 09-Jul-21 07:15 11-Jul-21 17:45 2.44 Days
Continuous		 719L (256s - 719L134) GOI, 719L (256s Harmattan - 719CL tap) maintenance work (Strs 4 ~ 72)  
EPCOR 12-Jul-21 07:00 20-Jul-21 17:00 8.42 Days
Continuous		 1055L, 1055L (629s Argyll Transfer Station - 816s Petrolia) Line Maintenance  
ENMAX 12-Jul-21 08:00 12-Jul-21 11:00 3 Hours
Continuous		 162B240-RB133, 162s 240-RB133 (162s Beddington) SF6 Sample. Dashpot Checks 162B240-RB133  
ALTALINK 12-Jul-21 08:00 16-Jul-21 16:00 4.33 Days
Continuous		 510s AC Filter 11 - GOI, 510s ACF11 (510s Sunnybrook) Annual Filter Bank outage and inspection  
ALTALINK 12-Jul-21 09:30 14-Jul-21 16:30 2.29 Days
Continuous		 42s906N Advice, 906L (17s Benalto - 42s Sarcee) Migrate and commission all 42s906N & L4-906L at 42s Sarcee associated line protections, recloser, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. .  
ATCO 12-Jul-21 10:00 19-Jul-21 15:00 7.21 Days
Continuous		 7L32, 7L32 (813s Little Smoky - 862s South Bezanson) Crossarm changing  
ENMAX 12-Jul-21 11:00 12-Jul-21 13:00 2 Hours
Continuous		 162B240-RB134, 162s 240-RB134 (162s Beddington) SF6 Sample. Dashpot Checks 162B240-RB134  
ENMAX 12-Jul-21 13:00 12-Jul-21 16:00 3 Hours
Continuous		 162B240-RB131, 162s 240-RB131 (162s Beddington) SF6 Gas Sample, Dashpot Checks 162B240-RB131  
ALTALINK 13-Jul-21 08:00 14-Jul-21 16:00 1.33 Days
Continuous		 510s AC Filter 12 - GOI, 510s ACF12 (510s Sunnybrook) Annual Filter Bank outage and inspections  
ATCO 13-Jul-21 08:00 22-Aug-21 17:00 40.38 Days
Continuous		 809S 901T, 809s 901T (809s Louise Creek) Louise Creek Rebuild project- Replace 912, 900PT1, CT modifications to 906CT, 912CT, and 901T  
ALTALINK, Lethbridge 15-Jul-21 08:00 15-Jul-21 13:00 5 Hours
Continuous		 725L (15s Fort MacLeod - 674s Lethbridge Bowron) air break function test and maintance
 
EPCOR 19-Jul-21 07:00 23-Jul-21 17:00 4.42 Days
Continuous		 Petrolia- 1055L CVT, 1055L (629s Argyll Transfer Station - 816s Petrolia) Substation Life Cycle Replacement of HV VTs - Petrolia- 1055L CVT  
ALTALINK, ENMAX 19-Jul-21 09:00 22-Jul-21 17:00 3.33 Days
Continuous		 21.80L(42s - Enmax sub #21) GOI, 21.80L (42s Sarcee - ENMAX 21) Migrate and commission all 42s21 (752) & L7-21.80L at 42s Sarcee associated line protections, recloser, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. Install and commission new SCADA meter.  
BCH 19-Jul-21 09:00 23-Jul-21 17:00 4.33 Days
Continuous		 5L91 (Ashton Creek - Selkirk) structure replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK 20-Jul-21 07:15 21-Jul-21 17:45 1.44 Days
Continuous		 891L (891L1 - 226s) GOI, 891L (226s Garden City - 863L tap) Scope of work includes maintenance on structures 7, 9, 15, 17, 18, 20, 24, 28, 29, 30, 35 and 37  
SUNCOR 22-Jul-21 08:00 03-Aug-21 17:00 12.38 Days
Continuous		 635PL9-1000 and 635PT-1000, 635EDD-1000 635-952-635PT-1000 (635EDD-1000), 635PL9-1000 (2005s Secord - 635EDD-1000) 260kV line structure change for line lift; maintenance of 260kV line, transformer, associated equipment and protection  
EPCOR 26-Jul-21 07:00 29-Jul-21 17:00 3.42 Days
Continuous		 987s GDS1 (987s Cloverbar) Line Maintenance  
EPCOR, ALTALINK 26-Jul-21 07:00 30-Jul-21 17:00 4.42 Days
Continuous		 Dome 909L CVT Replacement, 909L (310p Sundance - 665s Dome) Dome 909LW CVT Replacement  
EPCOR 26-Jul-21 07:00 20-Aug-21 17:00 25.42 Days
Continuous		 Poundmaker S/S Tx2 Bay Outage, 1098L bay outage and PM2405 bay outage, 1098L (805s Jasper - Poundmaker), T2 (Poundmaker) Continuation of 240 kV ring re-configuration for WETUP project.

HV bus re-configuration to tie Tx2 in between PM2401 and newly installed PM2405. Outage will provide isolation for HV bus re work and PMDS12 installation.		  
ALTALINK 26-Jul-21 09:00 29-Jul-21 17:00 3.33 Days
Continuous		 916L(42s - 5s) GOI, 916L (5s East Calgary - 42s Sarcee) Migrate and commission all 42s916E (1352) & L13-916L at 42s Sarcee associated line protections, recloser, POW, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. Project PM: Golaleh Rahimi Issue to: Jesse Soonias Contact #: 403-606-8152  
BCH 26-Jul-21 09:00 06-Aug-21 17:00 11.33 Days
Continuous		 5L96 (Selkirk - Vaseux Lake) marker ball installation, BC Maintenance does not affect the Alberta ATC AB-BC
ATCO 26-Jul-21 10:00 02-Aug-21 15:00 7.21 Days
Continuous		 7L32, 7L32 (813s Little Smoky - 862s South Bezanson) Crossarm changing  
SUNCOR 29-Jul-21 08:00 01-Aug-21 17:00 3.38 Days
Continuous		 635PP-1000, 635PL9-1000 (2005s Secord - 635EDD-1000) Bus-Side Disconnect Repairs Main Sub 635EDD-1000  
EPCOR 30-Jul-21 07:00 05-Aug-21 17:00 6.42 Days
Continuous		 987s GDS3 (987s Cloverbar) Line Maintenance  
ENMAX, ALTALINK 30-Jul-21 08:00 30-Jul-21 16:00 8 Hours
Continuous		 693L. 10.2TR. 10PT138-Z31, 693L (42s Sarcee - ENMAX 10), 10.2TR (ENMAX 10) Power factor test 10PT138-693, 10PT138-Z31  
EPCOR 03-Aug-21 07:00 03-Aug-21 17:00 10 Hours
Continuous		 RDS24, Bus 1 @ Rossdale and TX1 @ Bellamy E814S, 814s T1 (814s Bellamy) RDS24 Switch Repair, Doble Bellamy TX1 PT  
ALTALINK 03-Aug-21 07:00 06-Aug-21 18:00 3.46 Days
Continuous		 707L (54s - 166s) - GOI, 707L (54s Fort Saskatchewan - 166s Dow Chemical Fort Saskatchewan) 166s maintenance on T2, 166s707X (including 1st trip), & 138kV switches. 54s maintenance on 54s707N (including 1st trip) & 138kV switch. 707L line maintenance.  
ALTALINK 03-Aug-21 09:15 03-Aug-21 15:45 6.5 Hours
Daily		 514L (513s - 322s - 396s) GOI, 514L (513s Lundbreck - 514BL tap), 514L (396s Pincher Creek - 514BL tap) 514L2 Replace Insulation  
ALTALINK 03-Aug-21 09:30 05-Aug-21 16:30 2.29 Days
Continuous		 42s Cap bank C2 GOI, 42s C2 (42s Sarcee) Migrate and commission all Cap bank C2 & 42S74 (2152) associated protections, breakers, breaker fail, POW alarms, status, controls, metering and remote access to new RTU and LAN.  
ALTALINK 03-Aug-21 11:00 12-Aug-21 17:30 9.27 Days
Continuous		 905L (37s - 19s) - GOI, 905L (19s Wabamun - 37s North Calder) Replace 37s77 & 37s79 Switches. Maintenance on 37s76 including first trip testing. Replace grading caps on 37s76.  
EPCOR 05-Aug-21 07:00 06-Aug-21 17:00 1.42 Days
Continuous		 TX1 @ Rossdale and TX2 @ Bellamy E814S, 814s T2 (814s Bellamy), T1 (Rossdale) Rossdale TX1 Tap Changer Maintenance, BDS18 Repair/Maintenance, Doble Bellamy TX2 PT  
ENMAX, ALTALINK 05-Aug-21 08:00 20-Aug-21 16:00 15.33 Days
Continuous		 7.82L, 7.82L (42s Sarcee - ENMAX 7) Line relocation at Bow Trail. Phasing required.  
ALTALINK 06-Aug-21 07:15 11-Aug-21 17:45 5.44 Days
Continuous		 444L (217s - 198s) GOI, 444L (198s Blackfalds - 217s North Red Deer) Scope of work includes replacing structures 7, 8, 10 and 12 and maintenance on Structures 1, 2, 6 and 25  
EPCOR 09-Aug-21 07:00 13-Aug-21 17:00 4.42 Days
Continuous		 805 Bay @ Genesee 330P, 330p 805 (330p Genesee), 330P 12TC1 (330p Genesee) 805 Maintenance and CT Doble  
SUNCOR 09-Aug-21 08:00 12-Aug-21 18:00 3.42 Days
Continuous		 29EDD-65 Edd65Sub, 29PL9-12 (29EDD-34 - 29EDD-65) 29EDD65 ;29PT-259 SYSTEM;PM 5y line 29PL9-12  
ATCO 09-Aug-21 08:00 20-Aug-21 17:30 11.4 Days
Continuous		 2075S 900SST1, 2075s 900SST1 (2075s Newell) - Install Breaker Thermal Windows in LV1 Room at 2075S Newell
- 900SST1 Gasket Repalcements		  
SUNCOR, ATCO 09-Aug-21 08:00 22-Aug-21 18:00 13.42 Days
Continuous		 30EDD-2, 836s 621T (836s Steep Bank) 30EDD2;30PL2-1 SYSTEM;PM 5y
Replace Bushings in 621T in 30EDD-1
30EDD-1 621T Oil Leaks		  
BCH 09-Aug-21 09:00 13-Aug-21 17:00 4.33 Days
Continuous		 5L98 (BCH Nicola - Vaseux Lake) insulator replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK 09-Aug-21 09:30 12-Aug-21 16:30 3.29 Days
Continuous		 42s T2 (Tx18507) GOI, 42s T2 (42s Sarcee) Migrate and commission all T1 TX18507, 42S63 (289), 42S60 (1152) associated transformer protections, tap changer, breaker, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. .  
ALTALINK 10-Aug-21 07:00 10-Aug-21 18:00 11 Hours
Daily		 787L (71s - 787L29) - GOI, 787L (71s Lamoureux - 787AL tap) Fire mitigation on Structure #8  
ALTALINK 11-Aug-21 07:30 11-Aug-21 17:00 9.5 Hours
Daily		 166s787W (787L) - GOI, 166s 787W (166s Dow Chem Fort Saskatchewan), 787L (166s Dow Chemical Fort Saskatchewan - 787AL tap) 1st trip and PRC5 maintenance and fix broken shroud  
SUNCOR 12-Aug-21 08:00 24-Aug-21 17:00 12.38 Days
Continuous		 635PL9-1001 and 635PT-1001, 635EDD-1000 635-952-635PT-1001 (635EDD-1000), 635PL9-1001 (2005s Secord - 635EDD-1000) 260kV line structure change for line lift; maintenance of 260kV line, transformer, associated equipment and protection  
ENMAX, ALTALINK 13-Aug-21 08:00 13-Aug-21 16:00 8 Hours
Continuous		 1109L., 1109L (ENMAX 25 - ENMAX 65) Power factor test 25MD240-1109 LA. 25 Sub SW152, SW153 Replace Switch Mech  
EPCOR 16-Aug-21 07:00 16-Aug-21 17:00 10 Hours
Continuous		 240BA2 @ Argyll Transfer Station E629S and Bellamy E814S, 240BA2 (629s Argyll Transfer Station - 814s Bellamy) Doble CT/Arrestors  
SUNCOR 16-Aug-21 08:00 19-Aug-21 18:00 3.42 Days
Continuous		 29EDD-65, 29EDD-65 Edd65Sub, 29PL9-13 (29EDD-34 - 29EDD-65) 29PL9-13; 29PT-249;MTCE & TEST;(A)5Y  
ALTALINK 16-Aug-21 12:00 20-Aug-21 18:00 4.25 Days
Continuous		 946L (89s - 38s) - GOI, 946L (38s East Edmonton - 89s Ellerslie) Component Replacements 946L (Str's Range 30-71)  
ATCO 16-Aug-21 13:00 22-Aug-21 15:30 6.1 Days
Continuous		 930S SVC, 930s SVC (930s Arcenciel) Svc air cooled maintenance, various PRC relay testing  
ALTALINK 17-Aug-21 07:15 19-Aug-21 17:45 2.44 Days
Continuous		 608L (138s - 418s - 528s) GOI, 608L (138s Windy Flats - 418s Ardenville - 528s Blue Trail Wind Farm) Salvage 608AL31 Airbrake and install at training yard  
ALTALINK 18-Aug-21 07:00 18-Aug-21 17:30 10.5 Hours
Daily		 166s T1, T2, 707L & 862L - GOI, 166s T1 (166s Dow Chemical Fort Saskatchewan), 166s T2 (166s Dow Chemical Fort Saskatchewan), 707L (54s Fort Saskatchewan - 166s Dow Chemical Fort Saskatchewan), 862L (166s Dow Chemical Fort Saskatchewan - 258s Dow Hydro Carbons) 1st trip PRC5 maintenance on 166s862N, fix CT shroud and capacitor mount; T1: replace conservator gauge, fix Hydran monitor warning. 166s1 clean and adjust  
SUNCOR 19-Aug-21 08:00 22-Aug-21 17:00 3.38 Days
Continuous		 635PP-1001, 635PL9-1001 (2005s Secord - 635EDD-1000) Bus-Side Disconnect Repairs Main Sub 635EDD-1000  
ATCO 22-Aug-21 08:00 22-Aug-21 16:00 8 Hours
Continuous		 766S 901T, 766s 901T (766s Nevis) TransAlta GARDEN PLAIN PROJECT
Complete the structural and electrical work related to protection panel, Automation & SCADA panel and telecom panels.
Complete the line work associated with Line 9LA59 which will be connected to 1045S Garden Plain substation.		  
ATCO 23-Aug-21 08:00 25-Aug-21 17:00 2.38 Days
Continuous		 740S 701T, 740S 702T, 740S 703T, 740s 701T (740s H.R.Milner), 740s 702T (740s H.R.Milner), 740s 703T (740s H.R.Milner) Total 144kV station outage  
SUNCOR 23-Aug-21 08:00 28-Aug-21 18:00 5.42 Days
Continuous		 29EDD-65, 29EDD-65 Edd65Sub, 29PL7-4 (29EDD-65 - 29EDD-71) 29EDD65, ;29PT-257, & 29PL7-4,
SYSTEMs;PM 5y		  
BCH 23-Aug-21 08:00 01-Sep-21 16:00 9.33 Days
Continuous		 1L274 (B1s BCH Natal - 1D1L274) structure refurbishment AB-BC
ATCO 23-Aug-21 08:00 03-Sep-21 17:30 11.4 Days
Continuous		 2075S 900SST2, 2075s 900SST2 (2075s Newell) - Install Breaker Thermal Windows in LV2 Room at 2075S Newell
- 900SST2 Gasket Replacements		  
ATCO 23-Aug-21 08:30 26-Aug-21 17:00 3.35 Days
Continuous		 9L939, 9L939 (77s Sagitawah - 809s Louise Creek) Louise Creek Rebuild project- Replace 911.
9L939 needs to be out of service as it runs over the top of 911 breaker inside the substation		  
ATCO 23-Aug-21 08:30 03-Oct-21 17:00 41.35 Days
Continuous		 809S 902T, 809s 902T (809s Louise Creek) Louise Creek Rebuild project Upgrade 902T protection.
August 23-26, 2021 Replace 911 BKR, Isolation points: 809S 911A, 809S 911B associated with 2-56595 9L939 Outage
Aug 27-Oct.3, 2021
Expand GOI to include all of 902T isolation points 809S 500D1,809S 702A, 809S 910B, & 809S 911B		  
BCH 23-Aug-21 09:00 23-Aug-21 17:00 8 Hours
Continuous		 5L94 (Cranbrook - 102s Langdon) NERC PM AB-BC
ALTALINK 23-Aug-21 09:30 26-Aug-21 16:30 3.29 Days
Continuous		 42s T1 (Tx18508) GOI, 42s T1 (42s Sarcee) Migrate and commission all T1 TX18508, 42S44 (189), 42S40 (252) associated transformer protections, tap changer, breaker, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. .  
ALTALINK 23-Aug-21 10:00 26-Aug-21 18:00 3.33 Days
Continuous		 258s T1, 138kV Bus 1 & 862L - GOI, 258s T1 (258s Dow Hydro Carbons), 862L (166s Dow Chemical Fort Saskatchewan - 258s Dow Hydro Carbons) T2: maintain, doble, fix leaks, 258s5 adjust, 258s152 PRC maintain  
ATCO 23-Aug-21 10:00 30-Aug-21 15:00 7.21 Days
Continuous		 7L32, 7L32 (813s Little Smoky - 862s South Bezanson) Crossarm changing  
ALTALINK 23-Aug-21 12:00 27-Aug-21 18:00 4.25 Days
Continuous		 946L (89s - 38s) - GOI, 946L (38s East Edmonton - 89s Ellerslie) Component Replacements 946L (Str's Range 30-71)  
ATCO 24-Aug-21 08:00 25-Aug-21 16:00 1.33 Days
Continuous		 793S 704, A793s 704 (A793s West Peace), 7L04 (A793s West Peace River - 839s Daishowa) Complete 704 Maintenance PM,  
ATCO 26-Aug-21 08:00 03-Sep-21 17:00 8.38 Days
Continuous		 740S 700BS2, 740s H.R.Milner 144 kV Floating Bus 740S 770BS2 outage  
EPCOR 30-Aug-21 07:00 30-Aug-21 17:00 10 Hours
Continuous		 LDS4 @ Lambton E803S, 803S Lambton, 803s L2402 (803s Lambton), 803s L2405 (803s Lambton) LDS4 Disconnect Maintenance  
EPCOR 30-Aug-21 07:00 03-Sep-21 17:00 4.42 Days
Continuous		 Dome TX2 Bushing Replacement, 665s T2 (665s Dome) Replace 240kV Bushings (1007378)  
ATCO 30-Aug-21 08:00 02-Sep-21 17:00 3.38 Days
Continuous		 7L91, 7L91 (715s Leming Lake - 826s Marguerite Lake) Clearance Mitigation GOI on 7L91 HOP on 7L66  
ALTALINK, ENMAX 30-Aug-21 09:00 01-Sep-21 17:00 2.33 Days
Continuous		 28.80L(42s - Enmax sub #28) GOI, 28.80L (42s Sarcee - ENMAX 28) Migrate and commission all 42s28 (652) & L6-28.80L at 42s Sarcee associated line protections, recloser, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. .  
ATCO 30-Aug-21 09:00 02-Sep-21 16:00 3.29 Days
Continuous		 7L113, 7L113 (853s Ring Creek - 930s Arcenciel) Time Domain Line Protection Project for circuit modifications required to install new relays at Ring Creek 853S & Arcenceil 930S Substations.  
ALTALINK 30-Aug-21 09:15 03-Sep-21 17:45 4.35 Days
Continuous		 170L (632s - 799s) GOI, 170L (632s Russell - 799s Coleman) Fire Mitigation; Structure Replacements Strs 48-54 AB-BC
ALTALINK, EPCOR 30-Aug-21 12:00 03-Sep-21 18:00 4.25 Days
Continuous		 947L (89s - E987s) - GOI, 947L (89s Ellerslie - 987s Clover Bar) Component Replacements 947L (Str's Range 2-88)  
ATCO 02-Sep-21 08:00 03-Sep-21 16:00 1.33 Days
Continuous		 733S 702T, 733S 144kV Bus, 733s 702T (733s Simonette), 733s 701 (733s Simonette), 733s 702 (733s Simonette), 733s 703 (733s Simonette) 733S Simonette Expansion -Connect New Cap Bank
MD Greenview Pod		  
ENMAX, ALTALINK 04-Sep-21 08:00 24-Sep-21 16:00 20.33 Days
Continuous		 7.82L, 7.82L (42s Sarcee - ENMAX 7) HW 8 relocation. Phasing required.  
EPCOR 06-Sep-21 07:00 10-Sep-21 17:00 4.42 Days
Continuous		 Lambton LSD2, 803s L2401 (803s Lambton), 803s L2402 (803s Lambton), 803s T1 (803s Lambton) Substation Manual Disconnect Switches - Lambton LDS2  
ATCO 06-Sep-21 10:00 13-Sep-21 15:00 7.21 Days
Continuous		 7L32, 7L32 (811s Clairmont Lake - 862s South Bezanson) Crossarm changing  
ALTALINK, ENMAX 07-Sep-21 09:00 09-Sep-21 17:00 2.33 Days
Continuous		 693L (42s - Enmax sub # 10) GOI, 693L (42s Sarcee - ENMAX 10) Migrate and commission all 42s693 (1452) & L5-693L at 42s Sarcee associated line protections, recloser, POW, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN.  
ALTALINK, EPCOR 07-Sep-21 09:00 10-Sep-21 18:00 3.38 Days
Continuous		 947L (89s - E987s) - GOI, 947L (89s Ellerslie - 987s Clover Bar) Component Replacements 947L (Str's Range 2-88)  
ALTALINK 07-Sep-21 09:15 10-Sep-21 17:45 3.35 Days
Continuous		 170L (632s - 799s) GOI, 170L (632s Russell - 799s Coleman) Fire Mitigation; Structure Replacements Strs 48-54 AB-BC
EPCOR 09-Sep-21 07:00 23-Sep-21 17:00 14.42 Days
Continuous		 Poundmaker S/S Tx4 bay outage, PM2402 (Poundmaker), PM2403 (Poundmaker) Continuation of 240 kV ring re-configuration for WETUP project.

Outage will provide isolation for tie in of new Tx4.		  
ATCO 09-Sep-21 08:00 10-Sep-21 17:00 1.38 Days
Continuous		 740S 701T, 740S 702T, 740S 703T, 740s 701T (740s H.R.Milner), 740s 702T (740s H.R.Milner), 740s 703T (740s H.R.Milner) Total 144kV station outage  
EPCOR 13-Sep-21 07:00 17-Sep-21 17:00 4.42 Days
Continuous		 Lambton TX3 Outage, 803s T3 (803s Lambton) Breaker fail cutover - 1004039.036685
Substation Manual Disconnect Switches - Lambton LDS5 - 1007183.038109		  
ALTALINK 13-Sep-21 07:00 17-Sep-21 17:00 4.42 Days
Continuous		 511s T30 & SVC Plus - GOI, 511s T30 (511s Crossings), 511s SVC Plus (511s Crossings) Doble T30, SVC Plus maintenance, MSR re-wiring.  
ALTALINK 13-Sep-21 08:00 15-Sep-21 16:00 2.33 Days
Continuous		 510s AC Filter 14 - GOI, 510s ACF14 (510s Sunnybrook) Annual Filter Bank outage and inspections  
ENMAX, ALTALINK 13-Sep-21 08:00 16-Sep-21 16:00 3.33 Days
Continuous		 833L, 833L (ENMAX 2 - ENMAX 12) 12B138-833L CT Replacement  
ATCO 13-Sep-21 08:00 20-Sep-21 16:00 7.33 Days
Continuous		 9L07, 951S 905, 951S 906, 9L07 (951s Thickwood - 2011s Dawes), 951s 905 (951s Thickwood Hills), 951s 906 (951s Thickwood Hills) Cut in CT/'PT/SCADA circuits to the new RAS relays  
ATCO, ALTALINK 13-Sep-21 08:00 20-Sep-21 17:00 7.38 Days
Continuous		 7L77, 7L77 (395s North Holden - 709s Vegreville) GOI on 7L77 from 7L77D1 to 395S Holdon change arms insulators  
ATCO, ALBIAN, SHELL 13-Sep-21 08:30 13-Sep-21 12:00 3.5 Hours
Continuous		 919S 906, 847S 901T, 919s 906 (919s Hartley), 847s 901T (847s Muskeg River) PRC005 Trip coil testing, Test and operate 906, 901T @ 847S OOS
Coordinated with generator Planned outage		  
ATCO 13-Sep-21 08:30 01-Oct-21 17:30 18.38 Days
Continuous		 2029S BUILDING VALVE HALL, 2075S BUILDING VALVE HALL, 13L50 (DC LINK), 13L50 (2029s Heathfield - 2075s Newell) Valve Hall Inspections
- Valve Hall Camera Repairs
- LOP work		  
ALTALINK, ENMAX 13-Sep-21 09:00 15-Sep-21 17:00 2.33 Days
Continuous		 35.81L (42s - Enmax sub # 35) GOI, 35.81L (42s Sarcee - ENMAX 35) Migrate and commission all 42s35 (352) & L3-35.81L at 42s Sarcee associated line protections, recloser, POW, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. .  
ATCO, ALBIAN 13-Sep-21 12:00 13-Sep-21 16:00 4 Hours
Continuous		 919S 908, 847S 902T, 919s 908 (919s Hartley), 847s 902T (847s Muskeg River) PRC005 Trip coil testing. Test and operate 908 847S 902T OOS,Muskeg GTG-2 Generator will be unavailable.
Coordinated with generator Planned outage		  
ALTALINK, EPCOR 13-Sep-21 12:00 14-Sep-21 18:00 30 Hours
Continuous		 921L (71s-E987s) & 71s 240kV West Bus -, 921L (71s Lamoureux - 987s Clover Bar) Component Replacements on dead end glass on 921L, and Str's 41 & 72  
ATCO 14-Sep-21 13:30 14-Sep-21 16:30 3 Hours
Continuous		 828S 703, 828s 703 (828s Sulphur Point), 7L133 (786s High Level - 828s Sulphur Point) PRC-005 - TRIP COIL TESTING - BREAKER 703 @ 828S

703 OOS for duration of work under T&O for trip coil testing.		  
ALTALINK, EPCOR 15-Sep-21 07:00 16-Sep-21 18:00 1.46 Days
Continuous		 920L (71s - E557s) - GOI, 920L (71s Lamoureux - 557s Castle Downs) Component Replacements on 920L Str's Range ( 52D-100 )  
ATCO 19-Sep-21 08:30 23-Sep-21 15:00 4.27 Days
Continuous		 790S 703T, 790s 703T (790s Poplar Hill) 703T main
704 top up low pole with SF6		  
EPCOR 20-Sep-21 07:00 24-Sep-21 17:00 4.42 Days
Continuous		 Lambton LDS6, 803s L2403 (803s Lambton), 1058L (657s Summerside - 803s Lambton) Substation Manual Disconnect Switches - Lambton LDS6  
ATCO 20-Sep-21 08:00 23-Sep-21 16:00 3.33 Days
Continuous		 951S 900BS2, 951S 908, 951S 903, 951S 906, 951s 903 (951s Thickwood Hills), 951s 906 (951s Thickwood Hills), 951s 908 (951s Thickwood Hills) 951S construction for 9L162 & 9L193 addition
AESO should be notified of any changes to below workplan:

Jan 20, 2021 – Feb 20, 2021
Isolation pts: 908B,909A
Impact: BKR 908 OOS
Scope of work: Demo bus & install 909A & 909B
Feb 21, 2021 – Feb 23, 2021
Expand to isolation pts:903B, 906B,908B
Impact: BKR 903,BKR 906, 900BS2 OOS
Scope of work: Make connections to 909A & 912A		  
ENMAX, ALTALINK 20-Sep-21 08:00 23-Sep-21 16:00 3.33 Days
Continuous		 832L, 832L (ENMAX 10 - ENMAX 12) 12B138-832L CT Replacement  
BCH 20-Sep-21 09:00 24-Sep-21 17:00 4.33 Days
Continuous		 5L92 (Cranbrook - Selkirk) insulator replacement AB-BC
ALTALINK 20-Sep-21 12:00 21-Oct-21 18:00 31.25 Days
Continuous		 320P T6 – GOI, 320p T6 (320p Keephills) T6 Maintenance, leaks, CT replacement, Model 11 Relay replacements.  
ALTALINK 21-Sep-21 07:00 24-Sep-21 17:00 3.42 Days
Continuous		 61s 138kV Bus 1 (T1, 202L, 836L) - GOI, 202L (61s Lodgepole - 202AL tap), 836L (61s Lodgepole - 283s Violet Grove) Replacing 61s13 and strain insulators on 836L  
ATCO 24-Sep-21 08:00 26-Sep-21 16:00 2.33 Days
Continuous		 951S 900BS1, 951s 1201T (951s Thickwood Hills), 951s 920C (951s Thickwood) 951S construction for 240kv expansion - 9L162 & 9L193 addition
Connect 910A to 900BS1
Impact: 900BS1 OOS, BKR 901 OOS, BKR 904 OOS, BKR 907 OOS, 920C OOS		  
EPCOR 27-Sep-21 07:00 29-Oct-21 17:00 32.42 Days
Continuous		 Victoria TX5, E511s Victoria T5 (511s Victoria) Victoria TX5 regasketing  
BCH 27-Sep-21 09:00 08-Oct-21 17:00 11.33 Days
Continuous		 2L293 (Nelway - Selkirk) structure replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ATCO 29-Sep-21 08:00 01-Oct-21 16:00 2.33 Days
Continuous		 9L59, 9L59 (801s Anderson - 972s Tinchebray) TransAlta GARDEN PLAIN PROJECT
Line 9LA59 tie-in to Garden Plain Sub		  
ATCO 29-Sep-21 08:00 01-Oct-21 16:00 2.33 Days
Continuous		 801S 903, 801S 902, 9L59, 9L59 (801s Anderson - 972s Tinchebray) TransAlta GARDEN PLAIN PROJECT
Relay Settings changes		  
ATCO 29-Sep-21 08:00 01-Oct-21 16:00 2.33 Days
Continuous		 972S 901, 972S 902, 9L59, 9L59 (801s Anderson - 972s Tinchebray) TransAlta GARDEN PLAIN PROJECT
Relay Settings Changes		  
ATCO, ALTALINK 04-Oct-21 08:00 08-Oct-21 17:00 4.38 Days
Continuous		 7L77, 7L77 (395s North Holden - 709s Vegreville) GOI on 7L77 from 7L77D1 to 395S Holdon change arms insulators  
CMH 04-Oct-21 08:00 12-Oct-21 17:00 8.38 Days
Continuous		 T15 (MH69s-1 Power Plant Switchyard) rung T15 north T15 segment upgrade phase 4C  
ATCO 04-Oct-21 08:00 18-Oct-21 17:00 14.38 Days
Continuous		 9L939, 9L939 (77s Sagitawah - 809s Louise Creek) Louise Creek Rebuild project

Wiring for 905/906BF relays.
CT ratio changes.
Relay programming.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ALTALINK 04-Oct-21 09:30 06-Oct-21 16:30 2.29 Days
Continuous		 42s Cap Bank 3 (C3) GOI, 42s 76 (42s Sarcee), 42s C3 (42s Sarcee) Migrate and commission all Cap bank C3 & 42S76 (2252) associated protections, breakers, breaker fail, POW alarms, status, controls, metering and remote access to new RTU and LAN.  
ATCO 05-Oct-21 08:00 12-Oct-21 16:00 7.33 Days
Continuous		 12L44, 12L44 (939s Livock - 951s Thickwood Hills) Suncor Capacity increase project
Cut in new CT and PT circuit extension to the new RAS relays, T&O Line Terminal Open (LTO) on 1206, 1207, and 12L44D1 @ 939S APL Livock and 1244D1, 1205, 1206, 1201TA, and 901TA @ 951S APL Thickwood. Complete commissioning of RAS relays, end-to-end tests including output to Thickwood RAS		  
BCH 09-Oct-21 09:00 09-Oct-21 19:00 10 Hours
Continuous		 1L274 (48s Pocaterra - Britt Creek) BC Hydro work AB-BC
ATCO 11-Oct-21 08:00 18-Oct-21 16:00 7.33 Days
Continuous		 9L23, 848S 905, 848S 906, 9L23 (848s Ruth Lake - 977s Salt Creek), 848s 906 (848s Ruth Lake), 848s 905 (848s Ruth Lake) Cut in new CT and PT circuit extension to the new RAS relays, complete SCADA terminations  
BCH 11-Oct-21 09:00 05-Nov-21 17:00 25.33 Days
Continuous		 2L112 (Boundary - Nelway) oil containment install, BC Maintenance does not affect the Alberta ATC AB-BC
EPCOR 12-Oct-21 07:00 14-Oct-21 17:00 2.42 Days
Continuous		 330p 1204 (330p Genesee), 330p 1205 (330p Genesee) 1204 Bay Doble, G2 Arrestor Doble, G2 Zone Relay Maintenance  
ATCO, ALTALINK 12-Oct-21 08:00 14-Oct-21 17:00 2.38 Days
Continuous		 7L129, 7L129 (526s Buffalo Creek - 7LA129 tap) GOI 7L129D3 to 526S Buffalo Creek Reroute Transmission Line around water  
ALTALINK, ENMAX 12-Oct-21 09:00 14-Oct-21 17:00 2.33 Days
Continuous		 42s7.82 (42s - Enmax Sub #7) Advice, 7.82L (42s Sarcee - ENMAX 7) Migrate and commission all 42s7 (1552) & L15-7.82L at 42s Sarcee associated line protections, recloser, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. Install and commission new SCADA meter.  
ALTALINK 13-Oct-21 07:00 13-Oct-21 18:00 11 Hours
Daily		 903L (17s-320p) - GOI, 903L (17s Benalto - 320p Keephills) Asset Management request for crew to hold GOI and escort Acuren to inspect welds on 903L66  
ALTALINK 14-Oct-21 07:00 14-Oct-21 18:00 11 Hours
Daily		 913L (338s - 69s) - GOI, 913L (69s North Barrhead - 338s Cherhill) Crews performing mtce. on Structure #913L124  
ALTALINK 15-Oct-21 07:15 18-Oct-21 17:45 3.44 Days
Continuous		 820L (254s - 315s - 67s) GOI, 820L (254s Coaldale - 820AL tap), 820L (67s Stirling - 820AL tap) Scope of work includes maintenance on structures 160, 161, 168, 175, 176, 177, 179, 187, 190, 197 and 198  
EPCOR 15-Oct-21 17:00 16-Oct-21 17:00 24 Hours
Continuous		 72kV Bus 1 and 2 @ Cloverbar E987s and Namao, 987s Cloverbar 72kV Bus 1, 987s Cloverbar 72kV Bus 2 Arrestor Support Replacement, CDS4 repair, Bus 1/2 doble, CN10 Line Arrestor doble  
ATCO, ALTALINK 18-Oct-21 08:00 22-Oct-21 17:00 4.38 Days
Continuous		 7L129, 7L129 (526s Buffalo Creek - 7LA129 tap) GOI 7L129D3 to 526S Buffalo Creek Reroute Transmission Line around water  
ALTALINK 18-Oct-21 09:00 29-Oct-21 18:00 11.38 Days
Continuous		 1201L (520s - B2s) GOI, 1201L (520s Bennett - BCH Cranbrook) components-structure range 383-464 AB-BC
MONTANA 18-Oct-21 09:00 29-Oct-21 18:00 11.38 Days
Continuous		 MATL (120s Picture Butte - Montana) align with 1201L outage AB-MATL
ALTALINK 18-Oct-21 09:30 19-Oct-21 16:30 31 Hours
Continuous		 42s70 GOI, 42s 70 (42s Sarcee) Migrate and commission all 42s70 (1052) at 42s Sarcee associated protections, synch check, breakers, breaker fail alarms, status, controls, metering and remote access to new RTU and LAN. Project PM: Golaleh Rahimi Issue to: Jesse Soonias Contact #: 403-606-8152  
ALTALINK, Lethbridge 19-Oct-21 08:00 19-Oct-21 13:00 5 Hours
Continuous		 667L (146s Lethbridge MacDonald - 370s North Lethbridge), 146s 667 (146s Lethbridge McDonald) test trip and breaker fail trip  
ATCO 19-Oct-21 08:00 01-Nov-21 17:00 13.38 Days
Continuous		 9L05, 9L05 (809s Louise Creek - 813s Little Smoky) Louise Creek Rebuild project
Wiring for 904/905BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ATCO 25-Oct-21 08:00 01-Nov-21 16:00 7.33 Days
Continuous		 848S 901T, 848s 901T (848s Ruth Lake) Complete cut in CT/'PT/SCADAcircuits to the new RAS relays  
BCH 25-Oct-21 09:00 25-Oct-21 17:00 8 Hours
Continuous		 2L113 (B1s Natal - B2s Cranbrook) conductor repair AB-BC
BCH 25-Oct-21 09:00 29-Oct-21 17:00 4.33 Days
Continuous		 5L51 (Custer - Ingledow) insulator replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ALTALINK, Lethbridge 27-Oct-21 08:00 27-Oct-21 13:00 5 Hours
Daily		 667L (146s Lethbridge MacDonald - 370s North Lethbridge), 813L (146s Lethbridge MacDonald - 241s Lethbridge Uplands) energize new distribution transformer  
BCH 01-Nov-21 09:00 05-Nov-21 17:00 4.33 Days
Continuous		 5L52 (Custer - Ingledow) insulator replacement, BC Maintenance does not affect the Alberta ATC AB-BC
ATCO, ALTALINK 02-Nov-21 08:00 05-Nov-21 16:00 3.33 Days
Continuous		 12L41, 12L41 (510s Sunnybrook - 939s Livock) Suncor Capacity increase Project
Cut in new CT and PT circuit extension to the new RAS relays, T&O Line Terminal Open (LTO) on 1206, 1207, and 12L41D1 @ 939S APL
Livock and @ 510S Sunnybrook (Altalink). Complete commissioning of RAS relays, end-to-end tests including output to Thickwood RAS		  
ATCO 08-Nov-21 08:00 15-Nov-21 16:00 7.33 Days
Continuous		 848S 902T, 848s 902T (848s Ruth Lake) Cut in new CT and PT circuit extension to the new RAS relays, complete SCADA terminations.  
ATCO 14-Nov-21 08:00 29-Nov-21 17:00 15.38 Days
Continuous		 9L40, 9L40 (732s Mitsue - 809s Louise Creek) Louise Creek Rebuild project
Wiring for 903/904BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF protections.		  
ALTALINK 15-Nov-21 11:15 25-Nov-21 15:45 10.19 Days
Continuous		 370s47 GOI, 370s 1252 (370s North Lethbridge), 370s 47 (370s North Lethbridge), 968L (138s Windy Flats - 370s North Lethbridge) 370s N.Lethbridge 240kV Breaker (370s47) replacement  
ATCO 30-Nov-21 08:00 14-Dec-21 17:00 14.38 Days
Continuous		 9L02, 9L02 (809s Louise Creek - 813s Little Smoky) Louise Creek Rebuild project
Wiring for 903/910BF relays.
CT ratio changes.
Relay programming and functionality.
Commission control, alarms and status.
Blocking procedures for BF protections.		  
ATCO 06-Dec-21 08:00 13-Dec-21 16:00 7.33 Days
Continuous		 9L74, 888S 905, 888S 906, 9L74 (888s Dover - 960s Birchwood Creek), 888s 905 (888s Dover), 888s 906 (888s Dover) Cut in new CT and PT circuit extension to the new RAS relays, complete SCADA terminations.  
BCH 07-Dec-21 09:00 23-Dec-21 17:00 16.33 Days
Continuous		 1L274 (B1s BCH Natal - 1D1L274) structure refurbishment AB-BC
ATCO 14-Dec-21 08:00 21-Dec-21 15:00 7.29 Days
Continuous		 7L40, 7L40 (733s Simonette - 813s Little Smoky) 53455 MD Greenview Load Project
Install and commission new 144kV switches 7L40D? and 7L40D? at T-tap location.
Connect 7L40 to 7LA40D2.		  
ATCO 17-Jan-22 08:00 24-Jan-22 16:00 7.33 Days
Continuous		 9L84, 934S 905, 934S 906, 9L84 (934s Black Fly - 977s Salt Creek), 934s 905 (934s Blackfly), 934s 906 (934s Blackfly) Cut in new CT and PT circuit extension to the new RAS relays, complete SCADA terminations.  
ATCO, CNRL 27-Jan-22 08:00 07-Feb-22 17:00 11.38 Days
Continuous		 75-PLH-902, 75-PLH-902 (838s Horizon Mining - 849s Joslyn) ATCO 9L32-9L66 CNRL- Horizon Project
Disconnect existing 75-PLH-902 from Horizon substation 75
Connect new bus Horizon substation 75 (former 75-PLH-902 bay)to new 838S-900BS1
Reroute and connect 9L137 (former 75-PLH-902) to new 838S and energize
Commission 87L/900BS1 protection, end-to-end testing
Upgrade 21B/9L137 line protection @ 849S Joslyn
Commission line protection, SCADA and end-to-end testing, BF/DTT to 838S		  
ATCO, CNRL 08-Feb-22 08:00 19-Feb-22 17:00 11.38 Days
Continuous		 75-PLH-901, 75-PLH-901 (838s Horizon Mining - 849s Joslyn) ATCO 9L32-9L66 CNRL- Horizon Project
Disconnect existing 75-PLH-901 from Horizon substation 75
Connect new bus Horizon substation 75 (former 75-PLH-901 bay) to new 838S-900BS2
Reroute and connect 9L155 (former 75-PLH-901) to new 838S and energize
Commission 87L/900BS1 protection, end-to-end testing
Upgrade 21B/9L155 line protection @ 849S Joslyn
Commission line protection, SCADA and end-to-end testing, BF/DTT to 838S		  
ATCO, ALTALINK 14-Feb-22 08:00 14-Feb-22 18:00 10 Hours
Continuous		 7L65, 7L77, 7L77 (395s North Holden - 709s Vegreville), 7L65 (709s Vegreville - 710s Vermilion) String over 7L65 and 7L77  
ATCO 20-Feb-22 08:00 23-Feb-22 17:00 3.38 Days
Continuous		 9L66, 9L66 (847s Muskeg River - 849s Joslyn Creek) ATCO 9L32-9L66 CNRL- Horizon Project
Disconnect existing line 9L66 at tap point and connect new line segment to 838S Horizon Expansion
Disconnect existing 9L66 from Joslyn 849S
Commissioning upgrade - relay settings @ 847S		  
ATCO 24-Feb-22 08:00 27-Feb-22 17:00 3.38 Days
Continuous		 9L32, 9L32 (849s Joslyn Creek - 2005s Secord) ATCO 9L32-9L66 CNRL- Horizon Project
Disconnect existing line 9L32 at tap point and connect new line segment to 838S Horizon Expansion
Disconnect existing 9L32 from Joslyn 849S
Commissioning upgrade - relay settings @ 2005S		  
ATCO 01-Mar-22 08:00 03-Mar-22 17:00 2.38 Days
Continuous		 9L46, 9L46 (932s Pemukan - 959s Lanfine) Sharp Hills Wind Farm Project
Outage for structure foundations work directly under 9L46		  
ATCO 14-Mar-22 08:00 15-Mar-22 17:00 1.38 Days
Continuous		 766S 901T, 766s 901T (766s Nevis) Sharp Hills Wind Farm Project
Installation of new RAS panel at 766S Nevis		  
ATCO, ALTALINK 22-Mar-22 07:00 22-Mar-22 17:00 10 Hours
Continuous		 7L77, 7L77 (395s North Holden - 709s Vegreville) 7L65 Rebuild Project  
ATCO 09-Apr-22 08:00 15-Apr-22 17:00 6.38 Days
Continuous		 9L46, 9L46 (932s Pemukan - 959s Lanfine) Sharp Hills Wind Farm Project
Outage for Line termination to 363S Sedalia on 9L46		  
ATCO 02-May-22 08:00 15-May-22 00:17 12.68 Days
Continuous		 7L01, 7L01 (813s Little Smoky - 881s Sturgeon) 813S Little Smoky Rebuild
BKR 711 and 712 P&C wiring, remove old panel 8G, set up new panel 7P2, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 16-May-22 08:00 29-May-22 17:00 13.38 Days
Continuous		 7L46, 7L46 (813s Little Smoky - 845s Big Mountain) 813S Little Smoky Rebuild
Replace 705CT and 706CT junction boxes
705, 706 P&C wiring, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 30-May-22 08:00 12-Jun-22 17:00 13.38 Days
Continuous		 7L45, 7L45 (813s Little Smoky - 845s Big Mountain) 813S Little Smoky Rebuild813S Little Smoky Rebuild
BKR 703 and 704 P&C wiring, remove old panel 7G, set up new panel 7P4, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 13-Jun-22 08:00 26-Jun-22 17:00 13.38 Days
Continuous		 7L54, 7L54 (794s Valleyview - 813s Little Smoky) 813S Little Smoky Rebuild813S Little Smoky Rebuild
BKR 703 and 704 P&C wiring, remove old panel 7G, set up new panel 7P4, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 15-Jun-22 07:00 28-Jul-22 17:00 43.42 Days
Continuous		 972S 900BS2, 9L16, 9L16 (755s Cordel - 972s Tinchebray), 972s Tinchebray 240kV Bus 900BS2 Outage on 907B and 908A for the installation and commissioning of 907 and 907CT  
ATCO 29-Jun-22 07:00 01-Jul-22 17:00 2.42 Days
Continuous		 766S 701, 766S 901T, 766s 901T (766s Nevis), 766s 701 (766s Nevis) RAS modifications for the Pattern Lanfine WAGF project  
ATCO 12-Jul-22 07:00 16-Jul-22 17:00 4.42 Days
Continuous		 7L224, 774S 701, 7L224 (650s Hansman Lake - 774s Monitor), 774s 701 (774s Monitor) RAS modifications for the Pattern Lanfine WAGF project  
ATCO 25-Jul-22 08:00 07-Aug-22 17:00 13.38 Days
Continuous		 7L40, 7L40 (733s Simonette - 813s Little Smoky) 813S Little Smoky Rebuild
BKR 709 and 710 P&C wiring, remove old panels 3G and 4G, set up new panel 7P1, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 27-Jul-22 07:00 28-Jul-22 17:00 1.42 Days
Continuous		 972S 900BS2, 9L16, 9L16 (755s Cordel - 972s Tinchebray), 972s Tinchebray 240kV Bus 900BS2 Outage on 9L16 to cut the line over to the new bay  
ATCO 27-Jul-22 07:00 31-Jul-22 17:00 4.42 Days
Continuous		 7L760, 767S 702, 7L760 (767s Oyen - 7L760D2), 767s 702 (767s Oyen) RAS modifications for the Pattern Lanfine WAGF project  
ATCO 29-Jul-22 07:00 03-Aug-22 17:00 5.42 Days
Continuous		 9L177, 9L177 (620s Goldeye - 972s Tinchebray) Installing new 240Kv Bay (connect 907B to BUS 1) for 620S Goldeye substation connection  
ATCO 08-Aug-22 08:00 21-Aug-22 17:00 13.38 Days
Continuous		 7L32, 7L32 (813s Little Smoky - 862s South Bezanson) 813S Little Smoky Rebuild
BKR 701 and 702 P&C wiring, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 22-Aug-22 08:00 29-Aug-22 16:00 7.33 Days
Continuous		 766S 901T, 766s 901T (766s Nevis) Joss Jenner 2 Power Project Connection
Complete CT, PT, P&C cutover, commission
relays and DTT to 770S Three Hills (option 1) or 1-114S
Ghost Pine (option 2)		  
ATCO 05-Sep-22 08:00 24-Sep-22 17:00 19.38 Days
Continuous		 813S 901T, 813s 901T (813s Little Smoky) 813S Little Smoky Rebuild
Remove panels 3K,4K - install new panel 9T1 - BKR 901, 701, 705, 718 P&C wiring, prep work
Replace 500PT disconnect assembly
Relay programming and functionality
Commission control, alarms and status		  
ATCO 05-Sep-22 08:00 30-Sep-22 16:00 25.33 Days
Continuous		 972S 900BS2, 972s Tinchebray 240kV Bus 900BS2 CETO project  
ATCO 26-Sep-22 08:00 19-Oct-22 17:00 23.38 Days
Continuous		 813S 902T, 813s 902T (813s Little Smoky) 813S Little Smoky Rebuild
Remove panels 1K,2K - install new panel 9T2 - BKR 904, 710, 711, 713, 717 P&C wiring, prep work
Replace cap bank protection relays
Replace 501PT disconnect assembly
Relay settings update for capacitor banks 714C, 715C, 716C
Relay programming and functionality
Commission control, alarms and status		  
ATCO 22-Oct-22 07:00 02-Nov-22 17:00 11.42 Days
Continuous		 7L129, 7L129 (710s Vermilion - 918s Bauer) Re stringing conductor  
ATCO 24-Oct-22 08:00 06-Nov-22 17:00 13.42 Days
Continuous		 9L11, 9L11 (813s Little Smoky - 834s Wesley Creek) 813S Little Smoky Rebuild
Remove panels 5H,6H - install new panel 9P3 - BKR 905 and 906 P&C wiring, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 07-Nov-22 08:00 20-Nov-22 17:00 13.38 Days
Continuous		 9L05, 9L05 (809s Louise Creek - 813s Little Smoky) 813S Little Smoky Rebuild
Remove panels 5H,6H - install new panel 9P3 - BKR 905 and 906 P&C wiring, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 21-Nov-22 08:00 04-Dec-22 17:00 13.38 Days
Continuous		 9L02, 9L02 (809s Louise Creek - 813s Little Smoky) 813S Little Smoky Rebuild
Remove panels 5H,6H - install new panel 9P3 - BKR 905 and 906 P&C wiring, prep work
Relay programming and functionality
Commission control, alarms and status		  
ATCO 05-Dec-22 08:00 18-Dec-22 17:00 13.38 Days
Continuous		 813S SVC, 813s SVC (813s Little Smoky) 813S Little Smoky Rebuild
Cutover new filter bank relays, P&C wiring
Relay programming and functionality
Commission control, alarms and status		  
ATCO 15-Dec-22 07:00 23-Dec-22 17:00 8.42 Days
Continuous		 730S 702, 730S 704, 730s 702 (730s Rycroft), 7L73 (730s Rycroft - 829s Boucher Creek), 730s 704 (730s Rycroft) SVC addition and 144 kv bus rebuild.  
ATCO 21-Mar-23 08:00 22-Mar-23 17:00 1.38 Days
Continuous		 7L53, 7LA53, 7L53 (700s Bonnyville - 706s Irish Creek) Cold Lake Area Energy Centre Project
7LA53 (New Line T-Tap)
1064S Garnier Lake Sub (Customer)

Build 6km 7LA53 144kV from T-Tap to 1064S Garnier Lake Substation.
Remote end protection upgrades		  
ATCO 27-Mar-23 08:00 30-Mar-23 17:00 3.38 Days
Continuous		 7L91, 7L91 (715s Leming Lake - 826s Marguerite Lake) Cold Lake Area Energy Centre Project
Cutover CT/PT/P&C ccts for new Thermal RAS relays
Complete commissioning 49A/49B/7L91 relays
End-to-end testing to 1064S		  

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

Prepared On: 2021-04-14   3:03:40 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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