Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2020-04-04

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 02-Mar-20 08:00 15-May-20 16:00 74.29 Days
Continuous		 2029s ACF11 (2029s Heathfield) Forced outage repairs  
ATCO 30-Mar-20 09:00 07-Apr-20 14:00 8.21 Days
Continuous		 7L22 (811s Clairmont Lake - 7L22D2) customer road move for county of Grande Prairie  
EPCOR 04-Apr-20 07:00 05-Apr-20 17:00 1.42 Days
Continuous		 240CV5, and Vic TX5 @ Victoria & Castledowns Doble 250CV5 CVVT/CT's zone at Castledowns, and Low side CVT's of TX5 at Victoria. VDS21 Repair.  
ALTALINK 06-Apr-20 06:00 09-Apr-20 09:00 3.13 Days
Continuous		 63s2652 GOI 63s2652L,C,R -PRC5 Breaker maintenance.  
EPCOR 06-Apr-20 07:00 06-Apr-20 17:00 10 Hours
Continuous		 VDS21 - CV5 @ victoria Repair disconnect  
ATCO 06-Apr-20 08:00 13-Apr-20 16:00 7.33 Days
Continuous		 740S 701 RAS testing & coordination on BKR 701  
EPCOR 06-Apr-20 09:30 06-Apr-20 16:00 6.5 Hours
Continuous		 915L Doble Testing  
ATCO 06-Apr-20 10:00 09-Apr-20 15:00 3.21 Days
Continuous		 7L40 7L40 Xarm/Insulator Replacement  
ALTALINK 06-Apr-20 11:00 07-Apr-20 17:00 30 Hours
Continuous		 163s1552(1002L) GOI Settings Changes of Sync Check and Functional Testing on 163s1552 CUH90 relay.  
ALTALINK 07-Apr-20 08:00 07-Apr-20 17:30 9.5 Hours
Daily		 132s6 GOI Maintain 240kV SF6 breaker.  
EPCOR 08-Apr-20 08:00 09-Apr-20 16:00 1.33 Days
Continuous		 947L Doble Testing  
ATCO 13-Apr-20 08:00 27-Apr-20 16:00 14.33 Days
Continuous		 740S 705, 7L80 (733s Simonette - 740s H.R.Milner) replace 705 PT and 705 CT
7L80 required open ended for the duration		  
EPCOR 14-Apr-20 07:00 14-Apr-20 17:00 10 Hours
Continuous		 C2404 Doble  
ATCO 14-Apr-20 10:00 24-Apr-20 14:00 10.17 Days
Continuous		 7L199 7L199 OOS for X-ARMS changes  
ATCO 14-Apr-20 10:00 26-Apr-20 16:00 12.25 Days
Continuous		 7L59 Cross- Arm change out  
ALTALINK, ATCO 15-Apr-20 07:00 15-Apr-20 18:00 11 Hours
Daily		 830L (562s Cypress - 840s McNeill Station), 840S McNeill Station Line Clearance Mitigation 830L82 AB-SK
ATCO 15-Apr-20 08:00 15-Apr-20 16:00 8 Hours
Continuous		 7L69 Pole relocate for Customer  
ALTALINK 15-Apr-20 08:30 15-Apr-20 17:30 9 Hours
Daily		 71s1752 - GOI Breaker maintenance  
ATCO 15-Apr-20 10:00 08-May-20 17:00 23.29 Days
Continuous		 856S 903T 903T Tertiary 59N Protection Installation at 856S Kinosis, 901T and 902T will be Inservice @ 856S  
ALTALINK 15-Apr-20 11:00 16-Apr-20 17:00 30 Hours
Continuous		 163s1752(1002L) GOI Settings Changes of Sync Check and Functional Testing on 163s1752 CUH90 relay.  
ALTALINK 16-Apr-20 07:00 24-Apr-20 18:00 8.46 Days
Continuous		 913L (69s - A732s) - GOI Urgent repair line clearance mitigation to adjust sag between Structures #187 - 196 and between Structures #199 - 202  
EPCOR 17-Apr-20 07:00 17-Apr-20 17:00 10 Hours
Continuous		 921L Doble  
EPCOR 17-Apr-20 07:00 19-Apr-20 17:00 2.42 Days
Continuous		 711L / 747L 711L4 Air Break - Replacement  
EPCOR 20-Apr-20 07:00 24-Apr-20 17:00 4.42 Days
Continuous		 805s J2403 (805s Jasper) Maintenance / Doble  
ENMAX 20-Apr-20 08:00 22-Apr-20 12:00 2.17 Days
Continuous		 65.1TR T-60 Upgrade Phase 2. Oil sampling MT, TC, Check reversing switch. Replace Switch Mech SW135, SW141  
ATCO 20-Apr-20 08:00 22-Apr-20 17:00 2.38 Days
Continuous		 856S 902 PRC-005 Test 902 Trip Coil(s), only one breaker tested at a time, approximate testing time per breaker = 2 hours  
ATCO 20-Apr-20 08:00 22-Apr-20 17:00 2.38 Days
Continuous		 856S 901 PRC-005 Test 901 Trip Coil(s), only one breaker tested at a time, approximate testing time per breaker = 2 hours  
ATCO 20-Apr-20 08:00 22-Apr-20 17:00 2.38 Days
Continuous		 856S 903 PRC-005 Test 903 Trip Coil(s), only one breaker tested at a time, approximate testing time per breaker = 2 hours  
ATCO 20-Apr-20 08:00 22-Apr-20 17:00 2.38 Days
Continuous		 856S 904 PRC-005 Test 904 Trip Coil(s), only one breaker tested at a time, approximate testing time per breaker = 2 hours  
ATCO 20-Apr-20 08:00 22-Apr-20 17:00 2.38 Days
Continuous		 856S 906 PRC-005 Test 906 Trip Coil(s), only one breaker tested at a time, approximate testing time per breaker = 2 hours  
ATCO 20-Apr-20 08:00 24-Apr-20 16:00 4.33 Days
Continuous		 7L24 RELAY PROTECTION UPGRADE  
ATCO 20-Apr-20 09:00 24-Apr-20 16:00 4.29 Days
Continuous		 755S 903 Repair leaks on Breaker, require manufacturer representative on site.

Ring bus will be opened		  
ATCO 20-Apr-20 09:30 23-Apr-20 16:00 3.27 Days
Continuous		 827S SVC perform testing on 703T, and other equipment.SVC will be offline  
ATCO 20-Apr-20 13:00 22-Apr-20 17:00 2.17 Days
Continuous		 7L33, 749S 703PT 749S 703PT PCB PT replacement - Cat 1 2020

7L33 open ended; Ring bus will be open		  
ALTALINK 22-Apr-20 07:30 22-Apr-20 16:30 9 Hours
Daily		 102s552 GOI top up low gas and investigate leak  
ENMAX 22-Apr-20 12:00 24-Apr-20 16:00 2.17 Days
Continuous		 65.2TR T-60 Upgrade Phase 2. Oil sampling MT, TC. Check reversing switch. Replace switch mech. SW130, SW136  
EPCOR 23-Apr-20 07:00 23-Apr-20 17:00 10 Hours
Continuous		 12BU1 Doble  
EPCOR 24-Apr-20 07:00 24-Apr-20 17:00 10 Hours
Continuous		 12BU2 Doble  
EPCOR 25-Apr-20 07:00 26-Apr-20 17:00 1.42 Days
Continuous		 711L / 747L 711L4 Air Break Replacement  
ALTALINK 27-Apr-20 06:00 06-May-20 18:00 9.5 Days
Continuous		 1241L/12L41 (510s - A939s) - GOI Cleaning up deficiencies from the project  
ALTALINK 27-Apr-20 07:00 30-Apr-20 18:00 3.46 Days
Continuous		 913L (69s - 338s) - GOI Line clearance mitigation to adjust sag between Structures # 58B - 63  
EPCOR 27-Apr-20 07:00 01-May-20 17:00 4.42 Days
Continuous		 P2401 Doble and Breaker Mtce  
ATCO 27-Apr-20 07:00 01-May-20 17:30 4.44 Days
Continuous		 2075S ACF14 PRC-005 Trip Coil Testing, No constraints,other type C is available  
ALTALINK 27-Apr-20 08:00 01-May-20 15:00 4.29 Days
Continuous		 370s75 (667L) Advice for CofL City of Lethbridge:removing 13.8 kv line in close proximity of 667L 138kv line.  
ATCO 27-Apr-20 08:00 15-May-20 17:00 18.38 Days
Continuous		 2029S ACF11 Perform PRC-005 tests on all devices associated with ACF11, co-ordinate with ACF11 GOI - 2-51464, Filter will be unavailable, One device worked on at a time
10BF11+SW1 -Breaker fail relay, 94 & 86 relay
10R10+R21 -F602, F604, F502, & F504 trench relay, 94, 87 & 86 relay
10R01+R1 - 94 & 86 relay
Trip Coil - 1218-A1, 1218-A2, 1218-B1, 1218-B2, 1218-C1, 1218-C2		  
ATCO 27-Apr-20 09:00 27-Apr-20 12:00 3 Hours
Continuous		 755S 901 PRC-005 - TRIP & CLOSE COIL TESTING - BREAKER 901-WEST @ 755S

RING BUS WILL BE OPENED		  
ATCO 27-Apr-20 09:00 27-Apr-20 17:00 8 Hours
Continuous		 12L44 Remove Vibration monitors, 12L41 will be out of service at this time  
ATCO 27-Apr-20 09:00 27-Apr-20 17:00 8 Hours
Continuous		 951S 1205 PRC 005 Testing requirement  
ATCO 27-Apr-20 09:00 27-Apr-20 17:00 8 Hours
Continuous		 951S 1206 PRC 005 Testing requirement  
ATCO 27-Apr-20 09:00 27-Apr-20 17:00 8 Hours
Continuous		 951S 1213 PRC 005 Testing requirement  
ATCO 27-Apr-20 09:00 27-Apr-20 17:00 8 Hours
Continuous		 939S 1206 PRC 005 Testing requirement  
ATCO 27-Apr-20 09:00 27-Apr-20 17:00 8 Hours
Continuous		 939S 1207 PRC 005 Testing requirement  
ATCO 27-Apr-20 09:00 27-Apr-20 17:00 8 Hours
Continuous		 939S 1216 PRC 005 Testing requirement  
ATCO 27-Apr-20 09:00 27-Apr-20 17:00 8 Hours
Continuous		 939S 1214 PRC 005 Testing requirement  
ATCO 27-Apr-20 09:00 01-May-20 16:00 4.29 Days
Continuous		 7L32 Line Mitigation Work  
ALTALINK 27-Apr-20 12:00 01-May-20 14:00 4.08 Days
Continuous		 909L (310p - E665s) - GOI Components/Structure Replacements (Structures #1B - 214)  
ATCO 27-Apr-20 12:30 27-Apr-20 16:00 3.5 Hours
Continuous		 755S 902 PRC-005 - TRIP & CLOSE COIL TESTING - BREAKER 902-WEST @ 755S

RING BUS WILL BE OPENED		  
ALTALINK 28-Apr-20 07:00 29-Apr-20 17:30 1.44 Days
Continuous		 33s 138kV Bus (76L, 84L, 113L) GOI 33sSS1/33s5 arcing (when opening 33s5 witnessed an arc from the opening blade of 33s5 to the head of SS1), SS1 (120V secondary cables of the SS PT have arced to clamps; reinsulate cables), 33s83 middle phase does not close  
ALTALINK 28-Apr-20 07:00 29-Apr-20 17:30 1.44 Days
Continuous		 33s 5 (33s Spray) Pole replacement, changing insulators and reconductor. 138kV breaker maintenance (33s1)  
ALTALINK 28-Apr-20 07:30 14-May-20 18:00 16.44 Days
Continuous		 71s T1 (Tx 18357) - GOI Crews will be replacing the HV & LV bushings; some minor maintenance work will also be completed if time exists  
ENMAX 28-Apr-20 08:00 28-Apr-20 16:00 8 Hours
Continuous		 23.80L HV breaker maintenance 23B138-23.80  
ATCO 28-Apr-20 09:00 28-Apr-20 12:00 3 Hours
Continuous		 755S 904 PRC-005 - TRIP & CLOSE COIL TESTING - BREAKER 904-WEST @ 755S

RING BUS WILL BE OPENED		  
ATCO 28-Apr-20 12:30 28-Apr-20 16:00 3.5 Hours
Continuous		 755S 905 PRC-005 - TRIP & CLOSE COIL TESTING - BREAKER 905-WEST @ 755S

RING BUS WILL BE OPENED		  
ATCO 29-Apr-20 08:00 22-May-20 17:00 23.38 Days
Continuous		 9L80, 757S 912T Add 59N Protection to 912T Tertiary Winding, 9L80 will be out of service  
ATCO 29-Apr-20 09:00 29-Apr-20 12:00 3 Hours
Continuous		 755S 906 PRC-005 - TRIP & CLOSE COIL TESTING - BREAKER 906-WEST @ 755S

RING BUS WILL BE OPENED		  
EPCOR 02-May-20 07:00 02-May-20 17:00 10 Hours
Continuous		 1056L / 240BA2 Doble  
EPCOR 04-May-20 07:00 05-May-20 17:00 1.42 Days
Continuous		 920L Doble  
EPCOR 04-May-20 07:00 08-May-20 17:00 4.42 Days
Continuous		 P2405 Maintenance / Doble  
ATCO 04-May-20 07:00 08-May-20 17:30 4.44 Days
Continuous		 2075S ACF12 PRC-005 Trip Coil Testing, No constraints,Redundant filter bank ACF22 will be in service.  
EPCOR 04-May-20 07:00 15-May-20 17:00 11.42 Days
Continuous		 Riverview S/S 1164L bay outage 1164L bay outage required for vendor breaker repairs at Riverview S/S  
ALTALINK 04-May-20 08:00 05-May-20 17:00 1.38 Days
Continuous		 PCES02L (391s - PCES02S) GOI Customer requested outage (PCES02L protection upgrade; CNOOC and AML) switch maintenance (391s23), grading caps (391s25)  
EPCOR 04-May-20 08:00 15-May-20 17:00 11.38 Days
Continuous		 TX2 at Petrolia Substation Replace Secondary Cables  
BCH 04-May-20 09:00 15-May-20 17:00 11.33 Days
Continuous		 5L98 (BCH Nicola - Vaseux Lake) clearance required to replace end of life insulators AB-BC
ATCO 04-May-20 10:00 08-May-20 16:00 4.25 Days
Continuous		 7L40 XARM change out  
ATCO 04-May-20 10:00 17-May-20 16:00 13.25 Days
Continuous		 7L59 Cross- Arm change out  
ALTALINK 05-May-20 08:00 07-May-20 18:00 2.42 Days
Continuous		 50L (44s - 21s) GOI Calgary Ring Road 50L line clearance – Installation of pile foundations beneath the 50L circuit for new Str 133 and 134 steel poles.  
EPCOR 06-May-20 07:00 07-May-20 17:00 1.42 Days
Continuous		 920LE Doble  
ALTALINK 06-May-20 07:30 07-May-20 06:00 22.5 Hours
Continuous		 263s 138kV bus 1, T1, 718L, 870L GOI 24hour outage to replace 263s1,138kv motor operated disconnect switch, qty 24 string glass insulators to be changed out.  
SUNCOR 09-May-20 08:00 15-May-20 18:00 6.42 Days
Continuous		 29EDD-56 Line outage to perform 5/10yr PM 29PL9-14 buss 29PP-41C and transformer 29PT-191 :
29EDD56;29PT-191 SYSTEM;PM 5Y/10Y,
Repair OHSW bonds to towers PL9-14/15,
29PL9-14, Reconnect Suspension Clamp,
29PL9-14, Repair OH Shield Bonds,
29EDD56;652-4170 MAINT & TEST;PM 10y,
29EDD-56 29PT-191 Oil Leak Repairs		  
EPCOR 11-May-20 07:00 15-May-20 17:00 4.42 Days
Continuous		 P2406 Maintenance / Doble  
ENMAX 11-May-20 08:00 24-May-20 16:00 13.33 Days
Continuous		 162.1TR B protection upgrade. Commission new circuits. HV SW maint SW131, SW141, SW81, SW96, MD138-162.1TR, MD240-162.1TR. Oil sampling 162.1 MT, TC, Bushing. Replace sw mech SW131, SW141. Check reversing sw.  
ALTALINK 11-May-20 09:15 15-May-20 10:45 4.06 Days
Continuous		 245s777X (777L) GOI 138kV CT Replacement  
ATCO 11-May-20 10:00 15-May-20 16:00 4.25 Days
Continuous		 7L40 XARM change out  
ALTALINK 11-May-20 12:00 15-May-20 14:00 4.08 Days
Continuous		 909L (89s - E665s) - GOI Components/Structure Replacements (Structures #218 - 228)  
ATCO 12-May-20 08:00 14-May-20 16:00 2.33 Days
Continuous		 801S 901T 801S Anderson 901T Oil Reclaiming
Will also be changing 14.4 KV PT and doing BKR 704 maintenance at the same time		  
ALTALINK 13-May-20 08:00 13-May-20 17:00 9 Hours
Daily		 1325L HVDC (510s-511s) - GOI 511s Crossings fire system not maintaing pressure. Repairs to Deluge System  
ATCO 19-May-20 07:00 22-May-20 17:30 3.44 Days
Continuous		 2075S ACF13 PRC-005 Trip Coil Testing, No constraints, Redundant filter bay ACF23 will be in service.  
EPCOR 19-May-20 07:00 01-Jun-20 17:00 13.42 Days
Continuous		 Riverview S/S 1139L bay outage 1139L bay outage required for vendor breaker repairs at Riverview S/S  
ALTALINK 19-May-20 12:00 22-May-20 14:00 3.08 Days
Continuous		 909L (310p - E665s) - GOI Components/Structure Replacements (Structures #1B - 214)  
ALTALINK 20-May-20 07:30 20-May-20 15:30 8 Hours
Daily		 138s603 Advice for customer 138 kV switch maintenance by customer  
ALTALINK 22-May-20 08:00 22-May-20 12:00 4 Hours
Daily		 612L (336s - 368s) GOI Fincastle Fortis Capacity Increase Project: Connect mobile high side to 612L.  
EPCOR 23-May-20 07:00 29-May-20 17:00 6.42 Days
Continuous		 72LH8, 72LS24, TX3 lambton Doble testing, Disconnect repair, T.C./breaker maintenance  
ATCO 25-May-20 07:00 29-May-20 17:30 4.44 Days
Continuous		 2075S 918 PRC-005 Trip Coil Testing, No constraints,Breaker 917 and Filter Bank 1 will remain in service  
ATCO 25-May-20 07:00 05-Jun-20 15:00 11.33 Days
Continuous		 2029S ACF12 Perform PRC-005 tests on all devices associated with ACF12 and breaker 1219, Filter will be unavailable, One device worked on at a time
10BF12+SW1- 86, 94 relays
10R10+R22 - F602, F604, & F502 trench relay, 87, 86, 94 Diff Relay
10R01+R1- 86, 94 relays
1218- Trip Coils		  
ENMAX 25-May-20 08:00 25-May-20 12:00 4 Hours
Continuous		 65B240-D131 SF6 sample  
ATCO 25-May-20 08:00 07-Jun-20 16:00 13.33 Days
Continuous		 7L91 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
BCH 25-May-20 09:00 05-Jun-20 17:00 11.33 Days
Continuous		 5L96 (Selkirk - Vaseux Lake) arcing horn replacement & insulator replacement AB-BC
ATCO 25-May-20 10:00 07-Jun-20 16:00 13.25 Days
Continuous		 7L59 Cross- Arm change out  
ENMAX 25-May-20 12:00 25-May-20 16:00 4 Hours
Continuous		 65B240-D130 SF6 Sample  
ALTALINK 25-May-20 12:00 29-May-20 14:00 4.08 Days
Continuous		 909L (310p - E665s) - GOI Components/Structure Replacements (Structures #1B - 214)  
ENMAX 26-May-20 08:00 26-May-20 12:00 4 Hours
Continuous		 65B240-D132 SF6 Sample  
ENMAX 26-May-20 12:00 26-May-20 16:00 4 Hours
Continuous		 65B240-D133 SF6 sample  
ENMAX 27-May-20 08:00 27-May-20 16:00 8 Hours
Continuous		 65B240-D134 SF6 sample. Counter Repair Near and Center Phases  
EPCOR 29-May-20 07:00 03-Jun-20 17:00 5.42 Days
Continuous		 1055L - Argyll to Petrolia Line Maintenance  
EPCOR 30-May-20 07:00 30-May-20 17:00 10 Hours
Continuous		 Genesee 1202CVTB Doble  
EPCOR 01-Jun-20 07:00 01-Jun-20 17:00 10 Hours
Continuous		 East Industrial TX2 Maintenance (Tap Changer)  
EPCOR 01-Jun-20 07:00 02-Jun-20 17:00 1.42 Days
Continuous		 1209 Maint./ Doble  
EPCOR 01-Jun-20 07:00 05-Jun-20 17:00 4.42 Days
Continuous		 Summerside TX2 Doble / SFRA  
ENMAX 01-Jun-20 08:00 01-Jun-20 16:00 8 Hours
Continuous		 693L HV Breaker Maintenance 10B138-693. SF6 sample. 10B138-693 - cabinet heater alarm  
ATCO, ALTALINK 01-Jun-20 08:00 05-Jun-20 17:00 4.38 Days
Continuous		 951s 1201T (951s Thickwood Hills), 951s 1206 (951s Thickwood Hills), 951s 1205 (951s Thickwood Hills), 951s 1213 (951s Thickwood Hills), 951s 1207 (951s Thickwood Hills), 951s 1214 (951s Thickwood Hills), 951s 1216 (951s Thickwood Hills), 951s 1213R (951s Thickwood HIlls), 12L41 (510s Sunnybrook - 939s Livock) Class 1 transformer major testing and operation checks  
ALTALINK 01-Jun-20 08:00 30-Jun-20 17:00 29.38 Days
Continuous		 50L (44s - 21s) GOI Calgary Ring Road 50L line clearance: Modify STR 131-132. Replace STR 133-135 and re-string 133-134. Replace STR 141, 143, remove STR 142 and re-string 141-143 span  
ALTALINK 01-Jun-20 09:30 04-Jun-20 16:30 3.29 Days
Continuous		 510s1152 (ACF 11) - GOI Annual inspection & maintenance  
ATCO 01-Jun-20 11:00 05-Jun-20 17:00 4.25 Days
Continuous		 813S SVC Yearly maintenance - Glycol is being changed - drain, flush, refill, Fittings and tubing will be changed as fittings have been leaking.  
ALTALINK 02-Jun-20 07:00 12-Jun-20 14:00 10.29 Days
Continuous		 909L (310p - E665s) - GOI Components/Structure Replacements (Structures #1B - 214)  
ENMAX 02-Jun-20 08:00 02-Jun-20 16:00 8 Hours
Continuous		 832L HV breaker maintenance 10B138-832L. SF6 sample  
EPCOR 03-Jun-20 07:00 04-Jun-20 17:00 1.42 Days
Continuous		 Genesee 1204 Breaker Doble and Breaker Mtce  
EPCOR 05-Jun-20 07:00 08-Jun-20 17:00 3.42 Days
Continuous		 1056L Line Maintenance  
CUPCAN 07-Jun-20 08:00 10-Jun-20 16:00 3.33 Days
Continuous		 850S Rainbow Cogen maintenance  
EPCOR 08-Jun-20 07:00 12-Jun-20 17:00 4.42 Days
Continuous		 TX1 @ Castledowns MV protection cutover  
EPCOR 08-Jun-20 07:00 12-Jun-20 17:00 4.42 Days
Continuous		 Summerside TX1 Doble / SFRA  
ALTALINK 08-Jun-20 07:00 16-Jun-20 18:00 8.46 Days
Continuous		 77s T1, 240kV & 138kV West Bus - GOI Replace T1 'A', T1 'B', 240B1 Protections  
ALTALINK 08-Jun-20 07:30 11-Jun-20 16:30 3.38 Days
Continuous		 511s1252 (ACF 11) - GOI Annual inspection & maintenance  
ATCO 08-Jun-20 08:00 21-Jun-20 16:00 13.33 Days
Continuous		 7L89 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ENMAX 08-Jun-20 08:00 21-Jun-20 16:00 13.33 Days
Continuous		 162.2TR (ENMAX 162 Beddington) Transformer differential relay replacement. Commission circuits. HV SW maint SW105, SW89, SW88, SW136, SW146, MD138-162.2TR, MD240-162.2TR. Oil sampling MT, TC, Bushings. Check reversing switch. Replace switch mech SW136  
ATCO 08-Jun-20 09:30 08-Jun-20 13:00 3.5 Hours
Continuous		 789S 701 PRC-005 - TRIP COIL TESTING - BREAKER 701 @ 789S

7L64 will be Open Ended for duration of work.		  
ATCO 08-Jun-20 13:00 08-Jun-20 16:30 3.5 Hours
Continuous		 789S 702, 7L62 PRC-005 - Trip coil testing breaker 702 @ 789S, 7L62 will be Open Ended for duration of work.  
ALTALINK 09-Jun-20 08:00 09-Jun-20 19:00 11 Hours
Daily		 907L (77s-122s) - GOI Replace 96/1752  
ATCO 09-Jun-20 08:30 09-Jun-20 12:30 4 Hours
Continuous		 7L59, 789S 703 PRC-005 - Trip coil testing breaker 703 @ 789S, 7L59 will be Open Ended for duration of work.  
ATCO 09-Jun-20 12:30 09-Jun-20 16:30 4 Hours
Continuous		 789S 704, 7L58 PRC-005 - Trip coil testing breaker 704 @ 789S, 7L58 will be Open Ended for duration of work.  
ALTALINK 11-Jun-20 08:00 14-Jun-20 17:00 3.38 Days
Continuous		 202L (62s-61s)- GOI Fire Mitigation / Maintenance on Strs 137, 138, 139, 141, 156 and 163  
ATCO 14-Jun-20 08:00 14-Jun-20 17:00 9 Hours
Continuous		 7L15 CNOOC will be completing a PM on the main disconnect switch (7L15D2) to our site, this job will require an isolation from Atco and a guarantee of isolation to be in place.

As well we’ll like to complete a quick Islanding trip test.		  
EPCOR 15-Jun-20 07:00 15-Jun-20 17:00 10 Hours
Continuous		 Summerside 1057LW Doble  
EPCOR 15-Jun-20 07:00 19-Jun-20 17:00 4.42 Days
Continuous		 Dome TX2 Zone Maintenance / Doble  
ALTALINK 15-Jun-20 09:30 18-Jun-20 16:30 3.29 Days
Continuous		 510s2152 (ACF 21) - GOI Annual inspection & maintenance  
ATCO 15-Jun-20 10:00 28-Jun-20 16:00 13.25 Days
Continuous		 7L59 Cross- Arm change out  
ALTALINK 15-Jun-20 12:00 19-Jun-20 14:00 4.08 Days
Continuous		 909L (310p - E665s) - GOI Components/Structure Replacements (Structures #1B - 214)  
EPCOR 16-Jun-20 07:00 16-Jun-20 17:00 10 Hours
Continuous		 Summerside 1058LW Doble  
BCH 16-Jun-20 09:00 26-Jun-20 17:00 10.33 Days
Continuous		 2L293 (Nelway - Selkirk) structure replacement AB-BC
ENMAX 19-Jun-20 08:00 19-Jun-20 18:00 10 Hours
Continuous		 985L. Power factor test HV LA 25MD240-985. replace switch mech. SW133, SW134  
ATCO 22-Jun-20 07:00 03-Jul-20 17:00 11.42 Days
Continuous		 2029s ACF13 (2029s Heathfield) PRC-005 - TRIP COIL TESTING - BREAKER 1220-A1 @ 2029S

BREAKER 1220 (10BF13) @ 2029S

PRC Testing for all Devices associated with ACF13

Filter will be unavailable, One device worked on at a time		  
ALTALINK 22-Jun-20 07:30 25-Jun-20 16:30 3.38 Days
Continuous		 511s2152 (ACF 21) - GOI Annual inspection & maintenance  
ATCO 22-Jun-20 08:00 05-Jul-20 16:00 13.33 Days
Continuous		 7L587 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ALTALINK 22-Jun-20 09:00 17-Jul-20 18:00 25.38 Days
Continuous		 180L (255s - 928s) - GOI OPGW install for the Claresholm project. 180L ( Str range 1- 204)  
ATCO 23-Jun-20 08:00 25-Jun-20 17:00 2.38 Days
Continuous		 848S 901T 901T Oil Reclaiming at 848S Ruth Lake  
EPCOR 26-Jun-20 07:00 06-Jul-20 17:00 10.42 Days
Continuous		 1059L Line Maintenance  
ENMAX 29-Jun-20 08:00 30-Jun-20 18:00 1.42 Days
Continuous		 1080L. Power factor test HV LA 25MD240-1080. LA 65MD240-1080. Replace switch mech 25SW146, 25SW147, 65SW133, 65SW134  
ATCO 02-Jul-20 08:00 02-Jul-20 16:00 8 Hours
Continuous		 201-PTL260-2 9L66 Temporary By-pass for Line relocate into 201-PTL260-2 bay at 847S Muskeg
Line crew to cut insulators in on all three phases of 201-PTL260-2 between tower 3 and 4 from Muskeg River. This will create an open isolation point that will be labeled J1. The reason for this open point is to shorten the length of line to be energized by live line methods to a safe length in regards to picking up charging current with a jumper.		  
EPCOR 06-Jul-20 07:00 06-Jul-20 17:00 10 Hours
Continuous		 Castledowns TX1 Maintenance / Doble  
ATCO 06-Jul-20 07:00 17-Jul-20 17:30 11.44 Days
Continuous		 13L50 (DC LINK) 2075S - NEWELL EATL OUTAGE

2020 EATL Outage:

T11 Testing		  
ATCO 06-Jul-20 08:00 09-Jul-20 17:00 3.38 Days
Continuous		 7L24 Replacing Cross-Arms, Poles and Ground Rod's  
ATCO 06-Jul-20 08:00 30-Aug-20 16:00 55.33 Days
Continuous		 826S 902T 240/144kV Breaker Fail Protection
(902T OOS for duration of outages)

826S Marguerite P&C Upgrade		  
BCH 06-Jul-20 09:00 08-Jul-20 17:00 2.33 Days
Continuous		 5L51 (Custer - Ingledow) disconnect maintenance AB-BC
ATCO 06-Jul-20 10:00 19-Jul-20 16:00 13.25 Days
Continuous		 7L59 Cross- Arm change out  
ATCO 06-Jul-20 11:00 11-Jul-20 16:00 5.21 Days
Continuous		 898S 902T, 789L, 788L Isolate 902T, 704, 708, 501 and test  
EPCOR 07-Jul-20 07:00 16-Jul-20 17:00 9.42 Days
Continuous		 1058L Line Maintenance  
ATCO 07-Jul-20 08:00 07-Jul-20 17:00 9 Hours
Continuous		 898S 901 Isolate and test breaker  
ATCO 08-Jul-20 08:00 08-Jul-20 17:00 9 Hours
Continuous		 898S 902 Isolate and test breaker  
ATCO 09-Jul-20 08:00 09-Jul-20 17:00 9 Hours
Continuous		 898S 903 898S - 903 BREAKER SF6 HPL COMPLETE TESTING
Isolate and test breaker

Breaker 903 will be out of service for the duration of work		  
SUNCOR 11-Jul-20 08:00 09-Aug-20 18:00 29.42 Days
Continuous		 29EDD-3 Line outage to perform 5/10yr PM 29PL9-3 29PT-6 AT GTG6:
29EDD-3;29PL9-3/GTG-6 15KVEQ SYSTEM;PM 5y,
29EDD-3 29PT-6 LEAKS - PRESSURE WASH		  
ATCO 12-Jul-20 08:00 12-Jul-20 10:00 2 Hours
Continuous		 898S 904 PRC-005 - TRIP COIL TESTING - BREAKER 904-A @ 898S
Isolate Breaker test trip coils

Breaker 904 will be out of service for the duration of work		  
ATCO 12-Jul-20 10:00 12-Jul-20 12:00 2 Hours
Continuous		 898S 905 PRC-005 - TRIP COIL TESTING - BREAKER 905-A @ 898S
Isolate Breaker test trip coils

Breaker 905 will be out of service for the duration of work		  
ATCO 12-Jul-20 12:00 12-Jul-20 14:00 2 Hours
Continuous		 898S 906 PRC-005 Test 906 Trip Coil(s), only one breaker tested at a time, approximate testing time per breaker = 2 hours  
ATCO 12-Jul-20 14:00 12-Jul-20 16:00 2 Hours
Continuous		 898S 908 PRC-005 Test 908 Trip Coil(s), only one breaker tested at a time, approximate testing time per breaker = 2 hours  
ATCO 12-Jul-20 16:00 12-Jul-20 18:00 2 Hours
Continuous		 898S 909 PRC-005 Test 909 Trip Coil(s), only one breaker tested at a time, approximate testing time per breaker = 2 hours  
EPCOR 13-Jul-20 07:00 17-Jul-20 17:00 4.42 Days
Continuous		 Genesee 1202 Doble  
ATCO 13-Jul-20 08:00 16-Jul-20 17:00 3.38 Days
Continuous		 7L24 Replacing Cross-Arms, Poles and Ground Rod's  
BCH 13-Jul-20 09:00 16-Jul-20 17:00 3.33 Days
Continuous		 2L113 (B1s Natal - B2s Cranbrook) disconnect maintenance AB-BC
ALTALINK 13-Jul-20 09:30 16-Jul-20 16:30 3.29 Days
Continuous		 510s1452 (ACF 14) - GOI Annual inspection & maintenance  
EPCOR 15-Jul-20 07:00 21-Jul-20 17:00 6.42 Days
Continuous		 1045L ( E805S - 310P - 320P ) Line Maintenance  
ENMAX 17-Jul-20 08:00 01-Aug-20 18:00 15.42 Days
Continuous		 36.81L. Haskayne line raise project. Raising the line and replacing 4 structures to accommodate a new road construction.  
ATCO 20-Jul-20 08:00 23-Jul-20 17:00 3.38 Days
Continuous		 7L24 Replacing Cross-Arms, Poles and Ground Rod's  
BCH 20-Jul-20 08:30 23-Jul-20 16:00 3.31 Days
Continuous		 2L112 (Boundary - Nelway) bpa outage/BCH disconnect maintenance AB-BC
BCH 21-Jul-20 09:00 23-Jul-20 09:00 2 Days
Continuous		 1L275 (799s Coleman - Natal) markerball installation AB-BC
EPCOR 22-Jul-20 07:00 28-Jul-20 17:00 6.42 Days
Continuous		 1098L ( E805S - Poundmaker ) Line Maintenance  
ENMAX 22-Jul-20 08:00 22-Jul-20 16:00 8 Hours
Continuous		 21.80L (2) HV Breaker maintenance. 21B138-21.80  
ENMAX 22-Jul-20 08:00 25-Jul-20 16:00 3.33 Days
Continuous		 21.80L (1) Move double structures on Sarcee Trail.  
EPCOR 27-Jul-20 07:00 31-Jul-20 17:00 4.42 Days
Continuous		 Jasper TX1 Doble  
ALTALINK 27-Jul-20 09:00 30-Jul-20 18:00 3.38 Days
Continuous		 786L/1L275 (799s - Natal) GOI 786L Restring. Str's 72,74,76,409,110,117*Some Fire Mitigation may be bundled later. AB-BC
BCH 27-Jul-20 09:00 07-Aug-20 17:00 11.33 Days
Continuous		 2L294 (A.A. Lambert - Cranbrook) structure replacement & disconnect maintenance AB-BC
ATCO 27-Jul-20 10:00 09-Aug-20 16:00 13.25 Days
Continuous		 7L59 Cross- Arm change out  
EPCOR 28-Jul-20 07:00 04-Aug-20 17:00 7.42 Days
Continuous		 909L ( E665S - 89S ) Line Maintenance  
EPCOR 30-Jul-20 07:00 30-Jul-20 17:00 10 Hours
Continuous		 Genesee 1209L Doble  
ENMAX 31-Jul-20 08:00 31-Jul-20 18:00 10 Hours
Continuous		 1003L Power factor test HV LA 25MD240-1003. Replace switch mech SW140, SW141  
ATCO 03-Aug-20 07:00 03-Nov-20 17:00 92.46 Days
Continuous		 972S 905B Halkirk 2 Windfarm Project  
ENMAX 04-Aug-20 08:00 04-Sep-20 16:00 31.33 Days
Continuous		 24.83L GT68 Transmission Line Relocate. Phasing required on return  
ALTALINK 04-Aug-20 09:00 07-Aug-20 18:00 3.38 Days
Continuous		 786L/1L275 (799s - Natal) GOI 786L Restring. Str's 72,74,76,409,110,117*Some Fire Mitigation may be bundled later. AB-BC
EPCOR 05-Aug-20 07:00 10-Aug-20 17:00 5.42 Days
Continuous		 909L ( E665S - 310P ) Line Maintenance  
ENMAX 08-Aug-20 08:00 08-Aug-20 12:00 4 Hours
Continuous		 693L. 10.2TR. 10PT138-Z31 Substation Washing  
ENMAX 08-Aug-20 12:00 08-Aug-20 18:00 6 Hours
Continuous		 832L. 10.1TR. 10PT138-Z31 Substation Washing  
EPCOR 10-Aug-20 07:00 13-Aug-20 17:00 3.42 Days
Continuous		 Castle Downs S/S Tx2 Outage Outage required for protection upgrade project  
EPCOR 10-Aug-20 07:00 14-Aug-20 17:00 4.42 Days
Continuous		 Lambton TX1 Doble / SFRA  
EPCOR 10-Aug-20 07:00 21-Aug-20 17:00 11.42 Days
Continuous		 TX3 @ Jasper DGA monitor  
ALTALINK 10-Aug-20 09:00 14-Aug-20 18:00 4.38 Days
Continuous		 786L/1L275 (799s - Natal) GOI 786L Restring. Str's 72,74,76,409,110,117*Some Fire Mitigation may be bundled later. AB-BC
EPCOR 17-Aug-20 07:00 20-Aug-20 17:00 3.42 Days
Continuous		 Castle Downs S/S Tx1 Outage Outage required for protection upgrade project  
EPCOR 17-Aug-20 07:00 21-Aug-20 17:00 4.42 Days
Continuous		 Lambton Tx2 Doble/ SFRA  
EPCOR 17-Aug-20 07:00 21-Aug-20 17:00 4.42 Days
Continuous		 Jasper TX3 Doble  
ATCO 17-Aug-20 07:00 28-Aug-20 17:00 11.42 Days
Continuous		 2029S ACF14 PRC-005 - TRIP COIL TESTING - BREAKER 1221-A @ 2029S

BREAKER 1221 (10BF14) @ 2029S

Filter will be unavailable, One device worked on at a time

Depending on power transfer level, reduce voltage mode will be activated.		  
ALTALINK 17-Aug-20 09:00 21-Aug-20 18:00 4.38 Days
Continuous		 786L/1L275 (799s - Natal) GOI 786L Restring. Str's 72,74,76,409,110,117*Some Fire Mitigation may be bundled later. AB-BC
ATCO 17-Aug-20 10:00 30-Aug-20 16:00 13.25 Days
Continuous		 7L59 Cross- Arm change out  
EPCOR 24-Aug-20 07:00 25-Aug-20 17:00 1.42 Days
Continuous		 Castle Downs S/S Tx2 Outage Outage required for protection upgrade project  
EPCOR 24-Aug-20 07:00 28-Aug-20 17:00 4.42 Days
Continuous		 Dome TX1 Maintenance / Doble  
ALTALINK, MONTANA 24-Aug-20 09:00 04-Sep-20 18:00 11.38 Days
Continuous		 1201L (520s Bennett - BCH Cranbrook), MATL (120s Picture Butte - Montana) Structure range 187-508 Component's and Fire Mitigation( 95050674) AB-BC
EPCOR 31-Aug-20 07:00 31-Aug-20 17:00 10 Hours
Continuous		 Petrolia 1164L Doble  
EPCOR 31-Aug-20 07:00 25-Sep-20 17:00 25.42 Days
Continuous		 TX4 @ Jasper Bushing Replacement & Oil Work  
ATCO 31-Aug-20 08:00 25-Oct-20 16:00 55.33 Days
Continuous		 826S 901T 240/144kV Breaker Fail Protection
(901T OOS for duration of outages)

826S Marguerite P&C Upgrade		  
ATCO 01-Sep-20 08:00 14-Sep-20 12:00 13.17 Days
Continuous		 731S 701T, 7L03 731S Elmworth Bkr Replacement and Protection Upgrade

Outgae on 701T/7L03 (Isolation points - 501VRA, 501VRB,
501VRX, 700D1, 7L03D4, TBD for mobile sub on 25 kV bus)		  
BCH 01-Sep-20 09:00 03-Sep-20 17:00 2.33 Days
Continuous		 Natal T1 (BCH Natal) disconnect maintenance AB-BC
ALTALINK, MONTANA 08-Sep-20 09:00 11-Sep-20 18:00 3.38 Days
Continuous		 1201L (520s Bennett - BCH Cranbrook), MATL (120s Picture Butte - Montana) Structure range 187-508 Component's and Fire Mitigation( 95050674) AB-BC
ALTALINK, ATCO 14-Sep-20 08:00 25-Sep-20 17:00 11.38 Days
Continuous		 830L (562s Cypress - 840s McNeill Station), 840S McNeill Station 840S McNeill Fall 2020 Outage

PRC-005 Maintenance		 AB-SK
ALTALINK 14-Sep-20 08:00 27-Sep-20 18:00 13.42 Days
Continuous		 1325L (510s - 511s) - GOI Annual inspection & maintenance  
ALTALINK 14-Sep-20 09:00 16-Sep-20 16:00 2.29 Days
Continuous		 2s T1 (Tx18633) / 87L GOI 138kV VT Replacement  
SUNCOR 14-Sep-20 09:00 20-Sep-20 18:00 6.38 Days
Continuous		 29EDD-1 5yr and 10 yr maintenance on 29CTT-1 in 29EDD-1

Elements not available:
29CVT-1, 29PL9-2		  
BCH 14-Sep-20 09:00 25-Sep-20 17:00 11.33 Days
Continuous		 5L91 (Ashton Creek - Selkirk) insulator replacement AB-BC
ATCO 14-Sep-20 12:01 28-Sep-20 16:00 14.17 Days
Continuous		 7L69 731S Elmworth Bkr Replacement and Protection Upgrade

Outage on 7L69		  
EPCOR 21-Sep-20 07:00 25-Sep-20 17:00 4.42 Days
Continuous		 1044L east @ Jasper - Petrolia Vt Replacement  
ALTALINK 21-Sep-20 09:15 24-Sep-20 16:45 3.31 Days
Continuous		 245s T1 GOI 138kV CT Replacement  
ALTALINK 28-Sep-20 06:15 16-Oct-20 17:45 18.48 Days
Continuous		 777L (48s - 245s) GOI Maintenance and Structure replacements (Str 15 - 226) AB-BC
ATCO 28-Sep-20 07:00 29-Sep-20 17:00 1.42 Days
Continuous		 9L62 Installing new 240Kv Bay for 620S Goldeye substation connection
String 9L62 into 972S Tinchebray		  
SUNCOR 28-Sep-20 08:00 05-Oct-20 18:00 7.42 Days
Continuous		 29EDD-56 PL9-15 OUTAGE 5YR SYSTEM PM, 29PT-190 AND BREAKER 652-4110:
29EDD-56;29PT-190 SYSTEM;PM 5y,
29EDD-56;652-4110 MAINT & TEST;PM 10y,
Repair OHSW bonds to towers PL9-14/15
29EDD-56 Repair Leak 29PT-190		  
BCH 28-Sep-20 09:00 30-Sep-20 17:00 2.33 Days
Continuous		 5L92 (Cranbrook - Selkirk) annual plan request F19 AB-BC
ENMAX 05-Oct-20 08:00 18-Oct-20 18:00 13.42 Days
Continuous		 7.82L. WCRR 101 Street Project  
ENMAX 09-Oct-20 08:00 12-Oct-20 16:00 3.33 Days
Continuous		 162s PT-Z41. 1-GSU-XF-0001 Replace 87-XF1 B differential protection. Commission checks and trip testing  
ENMAX 09-Oct-20 08:00 12-Oct-20 16:00 3.33 Days
Continuous		 162s. 1-GSU HV SW maint SW133, SW132. Replace switch mech. SW132, SW133  
EPCOR 13-Oct-20 07:00 23-Oct-20 17:00 10.42 Days
Continuous		 TX1 @ Petrolia DGA Install  
BCH 19-Oct-20 09:00 30-Oct-20 09:00 11 Days
Continuous		 1L274 (B1s BCH Natal - 1D1L274) structure refurbishment AB-BC
ATCO 26-Oct-20 07:00 06-Nov-20 17:30 11.48 Days
Continuous		 13L50 (DC LINK) 2075S - NEWELL EATL OUTAGE

2020 EATL Outage:

Inspections

IR Camera Installs

nLFL Testing

Expansion Tank Sensor Replacement		  
ATCO 26-Oct-20 08:00 08-Nov-20 16:00 13.38 Days
Continuous		 9L36 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
EPCOR 02-Nov-20 07:00 03-Nov-20 17:00 1.42 Days
Continuous		 Castle Downs S/S Tx1 Outage Outage required for protection upgrade project  
EPCOR 05-Nov-20 07:00 06-Nov-20 17:00 1.42 Days
Continuous		 Castle Downs S/S Tx2 Outage Outage required for protection upgrade project  
ATCO 09-Nov-20 08:00 23-Nov-20 16:00 14.33 Days
Continuous		 9L37 240/144kV Breaker Fail Protection
(OOS for duration of outages)

826S Marguerite P&C Upgrade		  
EPCOR 16-Nov-20 07:00 27-Nov-20 17:00 11.42 Days
Continuous		 CV5 @ Castledowns & Victoria maint and splice repair  
BCH 16-Nov-20 09:00 18-Dec-20 09:40 32.03 Days
Continuous		 1L274 (B1s BCH Natal - 1D1L274) structure refurbishment AB-BC
EPCOR 23-Nov-20 07:00 27-Nov-20 17:00 4.42 Days
Continuous		 TX2 @ Castledowns TX protection cutover  
ATCO 05-Dec-20 07:00 11-Dec-20 16:00 6.38 Days
Continuous		 9L59 Outage for Garden Plain Wind Project  
ATCO 15-Dec-20 07:00 23-Dec-20 17:00 8.42 Days
Continuous		 730S 702, 730S 704 SVC addition and 144 kv bus rebuild.  
ATCO 04-Jan-21 08:00 09-Jan-21 16:00 5.33 Days
Continuous		 7L07 790S Poplar Hill Protection & SCADA Upgrade

Outage on 7L07		  
ATCO 05-Jan-21 08:00 08-Jan-21 16:00 3.33 Days
Continuous		 9L20 56772 Nevis Transformer Addition
9L20 Open -ended		  
ATCO 09-Jan-21 08:00 12-Jan-21 16:00 3.33 Days
Continuous		 9L912 56772 Nevis Transformer Addition
9L912 Open -ended		  
ATCO 16-Jan-21 08:00 23-Jan-21 16:00 7.33 Days
Continuous		 7L22 790S Poplar Hill Protection & SCADA Upgrade

Outage on 7L22		  
ATCO 20-Jan-21 08:00 23-Feb-21 16:00 34.33 Days
Continuous		 951S 900BS2, 951S 908, 951S 906, 951S 903 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		  
ATCO 25-Jan-21 08:00 26-Jan-21 16:00 1.33 Days
Continuous		 766S 901T, 9L20, 9L912 56772 Nevis Transformer Addition
Tie-in to the new bus for 902T
901T OOS
9L20 OPEN-ENDED
9L912 OPEN-ENDED		  
ATCO 03-Feb-21 07:00 07-Feb-21 17:00 4.42 Days
Continuous		 9L101 Line move for mine expansion.
Attach new line to existing 9L101		  
ATCO 15-Feb-21 07:00 02-Mar-21 17:00 15.42 Days
Continuous		 972S 900BS2, 9L16 Outage on 907B and 908A for the installation and commissioning of 907 and 907CT  
ATCO 22-Feb-21 08:00 22-Feb-21 18:00 10 Hours
Continuous		 7L65, 7L77 String over 7L65 and 7L77  
ATCO 24-Feb-21 08:00 26-Feb-21 16:00 2.33 Days
Continuous		 951S 900BS1 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		  
ATCO 01-Mar-21 07:00 02-Mar-21 17:00 1.42 Days
Continuous		 9L16, 972S 900BS2 Outage on 9L16 to cut the line over to the new bay  
ATCO 08-Mar-21 07:00 12-Mar-21 17:00 4.42 Days
Continuous		 9L177 Installing new 240Kv Bay (connect 907B to BUS 1) for 620S Goldeye substation connection  
ATCO 04-May-21 08:00 17-May-21 17:00 13.38 Days
Continuous		 9L02 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 24-May-21 08:00 06-Jun-21 17:00 13.38 Days
Continuous		 9L40 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.		  
ATCO 14-Jun-21 08:00 27-Jun-21 17:00 13.38 Days
Continuous		 9L05 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 29-Jun-21 08:00 29-Jun-21 16:00 8 Hours
Continuous		 7LA53 Install new 7LA53 deadend for prepping New Line Addition 7L208  
ATCO 30-Jun-21 08:00 14-Jul-21 16:00 14.33 Days
Continuous		 969S 700 BUS Install and connect mobile sub
Connect temp 4160 supply
Restore power through Mobile Sub
Complete installation and commissioning of 702 bay		  
ATCO 05-Jul-21 08:00 18-Jul-21 17:00 13.38 Days
Continuous		 9L939 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.		  
ATCO 26-Jul-21 08:00 28-Sep-21 17:00 64.38 Days
Continuous		 9L938, 809S 902T Louise Creek Rebuild project
Replace breakers' 911, 912, and 707.
Add new bus PT 700PT2.
Complete wiring for BF, 21A, 21B, and 701C relays.
CT ratio changes.
Commission apparatus.
Relay programming.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ATCO 29-Jul-21 08:00 05-Aug-21 17:00 7.38 Days
Continuous		 7L91 P&C wiring and commissioning associated to 7L208 work  
ATCO 02-Sep-21 08:00 03-Sep-21 16:00 1.33 Days
Continuous		 733S 144kV Bus, 733S 702T 733S Simonette Expansion -Connect New Cap Bank
MD Greenview Pod		  
ATCO 04-Oct-21 08:00 17-Oct-21 17:00 13.38 Days
Continuous		 809S 901T Louise Creek Rebuild project
Switch station service to alternate.
Replace bus PT 900PT1.
Complete wiring for BF, 87TA, 87TB, and 51NGR relays.
CT ratio changes.
Commission apparatus.
Relay programming.
Commission control, alarms and status.
Blocking procedures for BF and Bus protections.		  
ATCO 14-Dec-21 08:00 21-Dec-21 15:00 7.29 Days
Continuous		 7L40 53455 MD Greenview Load Project
Install and commission new 144kV switches 7L40D? and 7L40D? at T-tap location.
Connect 7L40 to 7LA40D2.		  
ATCO 22-Mar-22 07:00 22-Mar-22 17:00 10 Hours
Continuous		 7L77 7L65 Rebuild Project  
ATCO 05-Sep-22 08:00 30-Sep-22 16:00 25.33 Days
Continuous		 972S 900BS2 CETO project  

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

Prepared On: 2020-03-25   2:23:08 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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