Alberta Electric System Operator
Long Range Significant Transmission Outages for the period of 24 months starting 2019-01-12

The table below contains the significant transmission outages submitted as tentative to the AESO.
These Outages have not yet necessarily been approved, but are listed for awareness and coordination purposes.
An Outage has been considered significant for this table if it meets any one (1) or more of the following criteria:
  1. it affects a transmission facility operating at two hundred and forty (240) kV or greater;
  2. it affects an intertie;
  3. it affects an element connecting facilities owned by two (2) or more different legal owners of transmission facilities;
  4. it affects an element that connects a generating unit or an aggregated generating facility to the interconnected electric system;
  5. it requires the ISO to issue a dispatch or directive for generation in order to facilitate the planned outage;
  6. it affects a cutplane limit;
  7. it limits or reduces the operability of a synchronous condenser, static VAr compensator, static compensator or other similar dynamic device; or
  8. it affects high voltage direct current facilities.
Note: Where a transmission outage requires generation curtailments, the adjustments to generation will typically happen in the hours before the scheduled transmission outage and in the hour after the element is returned to service.

Previous Version
Download CSV

Owner From To Duration Element Scheduled Activity Affected Intertie
Syncrude 04-Oct-18 09:00 31-Mar-19 20:00 178.46 Days
Continuous		 Mildred T3 (Syncrude Mildred Lake) damaged transformer repairs  
ALTALINK 18-Dec-18 07:00 19-Jan-19 08:00 32.04 Days
Daily		 526L(526L190 - 526L208) creating temporary Open Point 'E' between structures #215 & 216  
ALTALINK 07-Jan-19 07:00 14-Jan-19 13:00 7.25 Days
Continuous		 1046L (310p - 338s) - GOI Re-routing 1046L temporarily onto 902L by creating Open Point 'B' & 'C' and jumpering 1046L to 902L to accommodate structure repairs  
EPCOR 07-Jan-19 07:30 13-Jan-19 17:00 6.4 Days
Continuous		 TX1 @ Jasper Metering Cutover  
ATCO 08-Jan-19 07:00 15-Jan-19 17:00 7.42 Days
Continuous		 7L73,800S 702 Upgrade 7L73 protection and install TPR and new RAS.

study not sent for		  
ALTALINK 09-Jan-19 07:00 06-Feb-19 19:00 28.5 Days
Continuous		 1212L (89s Ellerslie - 12s Heartland) spacer and damper replacement on Structures # 4 - 191  
ATCO, ALTALINK 10-Jan-19 07:00 22-Jan-19 18:00 12.46 Days
Continuous		 1035L (2075s Newell - 244s Bowmanton) component replacements  
ATCO 14-Jan-19 08:00 18-Jan-19 18:00 4.42 Days
Continuous		 9L59 9L59- GOI permit for Clearance Mitigation  
ALTALINK 14-Jan-19 09:30 17-Jan-19 18:00 3.35 Days
Continuous		 254s2162X & U/G cables GOI Disconnect old cables and connect new cables  
ALTALINK 14-Jan-19 12:00 28-Feb-19 13:00 45.04 Days
Continuous		 902L (310p - Open Point 'A') - GOI CANA has requested that his portion of 902L remain under a separate GOI zone to prevent mis-coordination  
ALTALINK 14-Jan-19 13:00 28-Feb-19 14:00 45.04 Days
Continuous		 1046L (Open Point 'B' - Open Point 'C') Replacing Structures #11 & 12  
ATCO 15-Jan-19 08:00 17-Jan-19 16:00 2.33 Days
Continuous		 827S SVC UPS replacement @ 827S Cranberry
SVC Outage to Replace 5KVA DC/AC Inverter
Limited VAR control on system. The only other means of control is the Capacitor Bank @ 780S		  
BCH 15-Jan-19 09:00 18-Jan-19 17:00 3.33 Days
Continuous		 2L294 (Nelway - A.A. Lambert) Placeholder for Annual Plan Request F19 - BC maintenance does not affect AB ATC AB-BC
ALTALINK 16-Jan-19 08:00 16-Jan-19 17:00 9 Hours
Daily		 13s1352 GOI Techs will be onsite to correct a wiring error on the 13s1352 breaker control interface.  
ALTALINK 19-Jan-19 08:00 19-Jan-19 17:00 9 Hours
Daily		 526L (526L190 - 659s - Open Point 'E') - Removing temporary bypass between Structures #200 - 203; Also replacing some wire near the A-frame @ 659s  
ENMAX 19-Jan-19 08:00 20-Jan-19 18:00 1.42 Days
Continuous		 7.82L. 7 sub transformer upgrade Phase2. Energize new 7PT138-Z32  
ALTALINK 20-Jan-19 07:00 20-Jan-19 17:00 10 Hours
Daily		 526L (526L208 - 519L2 - 526L220) - GOI Closing temporary Open Point 'E' between Structures #215 & 216 and creating new temporary Open Point 'F' between Structures #216 & 217  
ALTALINK 20-Jan-19 17:00 31-Jan-19 08:00 10.63 Days
Continuous		 526L (Open Point 'F' - 526L220) - GOI Re-building 526L between Structures #526L217 - 526L220  
ALTALINK 21-Jan-19 07:00 23-Jan-19 18:00 2.46 Days
Continuous		 510s2852 & 510s2952 - GOI 510s Sunnybrook to 939s Livock end to end protection testing via microwave path  
EPCOR 21-Jan-19 07:00 25-Jan-19 17:00 4.42 Days
Continuous		 1058L @ Lambton & Summerside DC power move  
EPCOR 21-Jan-19 07:00 25-Jan-19 17:00 4.42 Days
Continuous		 1055L / 240BA3 @ Petrolia S/S & Bellamy S/S Relay Maintenance  
EPCOR 21-Jan-19 07:00 28-Feb-19 17:00 38.42 Days
Continuous		 1058L @ Lambton S/S & Summerside S/S Relay Maintenance  
ATCO 21-Jan-19 08:00 25-Jan-19 18:00 4.42 Days
Continuous		 9L59 9L59- GOI permit for Clearance Mitigation  
ATCO 22-Jan-19 07:00 29-Jan-19 17:00 7.42 Days
Continuous		 7L75 Upgrade 7L75 protection and install new TPR and RAS

study not sent for		  
ALTALINK 22-Jan-19 09:00 22-Jan-19 14:00 5 Hours
Daily		 28s41 - GOI Add oil to middle phase  
ALTALINK 23-Jan-19 07:00 31-Jan-19 18:00 8.46 Days
Continuous		 1034L (244s - 324s) - GOI Component replacements between Structures #2 - 386  
EPCOR 28-Jan-19 07:00 28-Jan-19 17:00 10 Hours
Continuous		 LDS11& LDS12 @ Lambton Disconnect repair  
EPCOR 28-Jan-19 07:00 01-Feb-19 17:00 4.42 Days
Continuous		 1056L / 240BA2 @ Bellamy S/S & 89S S/S Relay Maintenance  
EPCOR 28-Jan-19 07:00 01-Feb-19 17:00 4.42 Days
Continuous		 1057L @ 89S S/S & Summerside S/S Relay Maintenance  
EPCOR 29-Jan-19 07:00 29-Jan-19 17:00 10 Hours
Continuous		 CDDS14 @ Castledowns Disconnect repair  
ATCO 29-Jan-19 08:00 30-Jan-19 16:00 1.33 Days
Continuous		 959s SVC GE to Install latest software for SVC, SVC will not be available for duration of outage  
ALTALINK 31-Jan-19 08:00 31-Jan-19 17:00 9 Hours
Daily		 526L (526L208 - 519L2 - 526L220) - GOI Closing temporary Open Point 'F' between Structures #216 & 217  
EPCOR 04-Feb-19 07:00 05-Feb-19 17:00 1.42 Days
Continuous		 Tx1 @ Bellamy S/S Relay Maintenance  
EPCOR 04-Feb-19 07:00 08-Feb-19 17:00 4.42 Days
Continuous		 Tx1 Outage @ E657S Summerside S/S Relay Maintenance  
ALTALINK 04-Feb-19 07:00 11-Feb-19 16:00 7.38 Days
Continuous		 1325L (510s - 511s) - De-energized Sunnybrook interconnection project requires modification to the 510s-511s C&P systems.  
ALTALINK 04-Feb-19 07:00 11-Feb-19 18:00 7.46 Days
Continuous		 510s2852 & 510s2952 - GOI Functional testing HVDC logic  
EPCOR 04-Feb-19 07:00 12-Feb-19 17:00 8.42 Days
Continuous		 909L-E @ 89S S/S & Dome S/S,Tx1 @ Dome S/S Relay Maintenance  
ALTALINK 04-Feb-19 07:30 14-Feb-19 15:30 10.33 Days
Continuous		 190L (17s-320p) - GOI 17s1, 17s2 C60s, 190L A&B Line protections and 190L Air Brk Control Modules. Firmware Upgrades and Testing  
BCH 04-Feb-19 09:00 14-Feb-19 17:00 10.33 Days
Continuous		 1L274 (Britt Creek - 1D4L274) replace end-of-life structures and related defects. AB-BC
ATCO 05-Feb-19 07:00 12-Feb-19 17:00 7.42 Days
Continuous		 7L73,730S 703 Upgrade 7L73 protection and install teleprotection and new RAS @ 730s, 829s radial fed from 800s.

study not sent for		  
ALTALINK 06-Feb-19 19:00 07-Mar-19 19:00 29 Days
Continuous		 1206L (89s - 12s) - GOI Spacer and damper replacement on Structures #4 - 191  
EPCOR 07-Feb-19 07:00 08-Feb-19 17:00 1.42 Days
Continuous		 TX2 @ Bellamy S/S Relay Maintenance  
ENMAX 10-Feb-19 08:00 10-Feb-19 12:00 4 Hours
Continuous		 37.82L. 37.2TR 37s CAC OAC RTU Commissioning.  
EPCOR 11-Feb-19 07:00 11-Feb-19 17:00 10 Hours
Continuous		 CD2405 Outage @ E557S Castle Downs S/S Relay Maintenance  
EPCOR 11-Feb-19 07:00 15-Feb-19 17:00 4.42 Days
Continuous		 Tx2 Outage @ E657S Summerside S/S Relay Maintenance  
EPCOR 14-Feb-19 07:00 19-Feb-19 17:00 5.42 Days
Continuous		 Tx2 @ Dome S/S Relay Maintenance  
EPCOR 18-Feb-19 07:00 22-Feb-19 17:00 4.42 Days
Continuous		 12TC1 Outage @ 330P Genesee S/S Relay Maintenance  
ALTALINK 19-Feb-19 07:30 19-Feb-19 11:30 4 Hours
Daily		 17s11 - GOI Trip Test for 190L Protection Replacement  
ALTALINK 19-Feb-19 11:30 19-Feb-19 14:00 2.5 Hours
Daily		 17s6 - GOI Trip Test for 190L Protection Replacement  
ALTALINK 19-Feb-19 14:00 19-Feb-19 16:00 2 Hours
Daily		 17s7 - GOI Trip Test for 190L Protection Replacement  
ALTALINK 20-Feb-19 07:30 20-Feb-19 11:30 4 Hours
Daily		 17s10 - GOI Trip Test for 190L Protection Replacement  
ALTALINK 20-Feb-19 11:30 20-Feb-19 14:00 2.5 Hours
Daily		 17s2852 & T3 - GOI Trip Test for 190L Protection Replacement  
ALTALINK 20-Feb-19 14:00 20-Feb-19 16:00 2 Hours
Daily		 17s3 - GOI Trip Test for 190L Protection Replacement  
ATCO 23-Feb-19 07:00 23-Feb-19 17:00 10 Hours
Continuous		 800S 702 Breaker fail testing  
EPCOR 25-Feb-19 07:00 01-Mar-19 17:00 4.42 Days
Continuous		 12TC2 Outage @ 330P Genesee S/S Relay Maintenance  
EPCOR 25-Feb-19 07:00 01-Mar-19 17:00 4.42 Days
Continuous		 Tx2 Outage @ E657S Summerside S/S Relay Maintenance  
ATCO 25-Feb-19 07:00 06-Mar-19 17:00 9.42 Days
Continuous		 824S 701TCS,824S 701T Replace 701TCS and upgrade protection  
ALTALINK 25-Feb-19 07:30 28-Feb-19 15:30 3.33 Days
Continuous		 1081L (17s-281s) - GOI 1081L A&B Line protections replacement  
ALTALINK 26-Feb-19 07:00 28-Feb-19 18:00 2.46 Days
Continuous		 749L (899s-7L749D3) - GOI Components ( washers) -Str's Range 296-436  
ALTALINK 28-Feb-19 14:00 07-Mar-19 16:00 7.08 Days
Continuous		 902L/1046L (310p - 19s - 338s) - GOI Valard will be closing temporary Open Point 'A', 'B' & 'C' and removing temporary bypass between 902L & 1046L  
EPCOR 04-Mar-19 12:00 04-Mar-19 16:00 4 Hours
Continuous		 J2404 @ Jasper Nait Tour  
SUNCOR 18-Mar-19 08:00 23-Mar-19 18:00 5.42 Days
Continuous		 29PL9-12 (29EDD-34 - 29EDD-65) broken strand repair  
ALTALINK, Lethbridge 21-Mar-19 08:00 21-Mar-19 16:00 8 Hours
Continuous		 734L (241s Lethbridge Uplands - 370s North Lethbridge) replace substation transformer  
ALTALINK 01-Apr-19 10:00 01-Apr-19 13:00 3 Hours
Continuous		 725BL (725BL54 - 240s McBride Lake),725L (15s Fort MacLeod - 725BL54) replace 138KV Breaker  
ALTALINK 01-Apr-19 10:00 01-Apr-19 13:00 3 Hours
Daily		 725L (L674s-15s-I_240s) Advice to COL Drop conductor between 674S1 and 674S3 in preparation to remove 674S725W switch  
ALTALINK 01-Apr-19 10:00 18-Apr-19 08:00 16.92 Days
Continuous		 725L (L674s-15s) Open End - LETHBRIDGE I Replace 674S725W switch and supporting pad  
ALTALINK, Lethbridge 01-Apr-19 10:00 18-Apr-19 08:00 16.92 Days
Continuous		 725L (674s Lethbridge Bowron - 725BL54) replace 674S725W switch  
SUNCOR 02-Apr-19 08:00 08-Jun-19 18:00 67.42 Days
Continuous		 29EDD-1 Millennium,29EDD-1 952_102 (29EDD-1 Millennium),29EDD-1 952_101 (29EDD-1 Millennium),29EDD-1 952_104 (29EDD-1 Millennium) 5 years maintenance  
ALTALINK 05-Apr-19 06:30 05-Apr-19 13:30 7 Hours
Daily		 666L (28s - 498s) Open Breaker Advices Perform IR scan of 892L; requires 892L to be loaded to (min) 30% to line rating  
ALTALINK 09-Apr-19 09:00 11-Apr-19 17:00 2.33 Days
Continuous		 498s666 GOI (affecting 666L) 498s666 outage to replace 3 CT’s. Outage April 9-11 0900- 1630 continuous.  
BCH 11-Apr-19 09:00 18-May-19 17:00 37.33 Days
Continuous		 5L71 (Mica Creek - Nicola) Placeholder for MCA Switchgear Roof Replacement. AB-BC
ALTALINK 18-Apr-19 08:00 18-Apr-19 14:00 6 Hours
Continuous		 725L (15s Fort MacLeod - 725BL54),725BL (725BL54 - 240s McBride Lake) replace 138KV Breaker  
ALTALINK 18-Apr-19 08:00 18-Apr-19 16:00 8 Hours
Daily		 725L (L674s-15s-I_240s) Advice to COL Install conductor between 674S1 and 674S3 and energize new 674S725W.  
ALTALINK 19-Apr-19 06:30 19-Apr-19 13:30 7 Hours
Daily		 666L (28s - 498s) Open Breaker Advices Perform IR scan of 892L; requires 892L to be loaded to (min) 30% to line rating  
ALTALINK 23-Apr-19 08:00 09-May-19 08:00 16 Days
Continuous		 725L (L674s-L111s-618s) Open End - LETHB Replace 674S725E switch and supporting pad  
ALTALINK, Lethbridge 23-Apr-19 10:00 23-Apr-19 13:00 3 Hours
Continuous		 725AL (618s Riverbend - 725L tap),725L (111s Coalbanks - 674s Lethbridge Bowron) replace 674S725E switch  
ALTALINK 23-Apr-19 10:00 23-Apr-19 13:00 3 Hours
Daily		 725L (L674s-L111s-618s) Advice to COL Drop conductor between 674S10 and 674S12 in preparation to remove 674S725E switch.  
ALTALINK, Lethbridge 23-Apr-19 13:00 09-May-19 08:00 15.79 Days
Continuous		 725L (111s Coalbanks - 674s Lethbridge Bowron) replace 674S725E switch  
ATCO 29-Apr-19 09:00 01-May-19 16:30 2.31 Days
Continuous		 715S 704,7L95 Breaker Maintenance & tie in bus lockout logic

NOT SENT FOR STUDY		  
ALTALINK 30-Apr-19 08:00 01-May-19 18:00 1.42 Days
Continuous		 1117L (267s-A898s) - GOI Required due to proximity for connecting New 789BL to 789L (Parallel Right Of Way)  
ALTALINK 09-May-19 08:00 09-May-19 14:00 6 Hours
Daily		 725L (L674s-L111s-618s) Advice to COL Install conductor between 674S10 and 674S12 and energize new 674S725E switch  
ALTALINK, Lethbridge 09-May-19 08:00 09-May-19 14:00 6 Hours
Continuous		 725AL (618s Riverbend - 725L tap),725L (111s Coalbanks - 674s Lethbridge Bowron) replace 674S725E switch  
EPCOR 13-May-19 07:00 21-May-19 17:00 8.42 Days
Continuous		 12BU1 Outage @ 330P Genesee S/S Relay Maintenance  
ATCO 23-May-19 07:00 28-May-19 16:00 5.38 Days
Continuous		 7L86 Build t tap for new Athik sub connection  
BCH 26-May-19 09:00 02-Aug-19 17:00 68.33 Days
Continuous		 5L72 (Mica Creek - Nicola) switchgear roof replacement AB-BC
ATCO 01-Jun-19 07:00 02-Jun-19 17:00 1.42 Days
Continuous		 959s 900BS1,959s 901T Attach new bay for 9L172 to Oyen Wind Power  
ATCO 03-Jun-19 08:00 02-Aug-19 16:00 60.33 Days
Continuous		 840S McNeill Station Protection Upgrade Project AB-SK
ATCO 06-Jun-19 07:00 07-Jun-19 17:00 1.42 Days
Continuous		 766S 901T,766S 701 RAS modifications for the Oyen Wind Power project  
EPCOR 10-Jun-19 07:00 21-Jun-19 17:00 11.42 Days
Continuous		 BA2 @ Bellamy & Argyll Degass  
EPCOR 24-Jun-19 07:00 12-Jul-19 17:00 18.42 Days
Continuous		 CV5 @ Castledowns & Victoria CV5 Inspections  
SUNCOR 24-Jun-19 08:00 28-Jun-19 18:00 4.42 Days
Continuous		 29EDD-1 Millennium 5 year maintenance  
SUNCOR 01-Jul-19 08:00 19-Jul-19 18:00 18.42 Days
Continuous		 29EDD-3 29Edd-3 maintenance  
SUNCOR 01-Jul-19 08:00 19-Jul-19 18:00 18.42 Days
Continuous		 30EDD-2 5 year maintenance  
SUNCOR 01-Jul-19 09:00 14-Jul-19 18:00 13.38 Days
Continuous		 30EDD-2 maintenance & testing on breaker  
ATCO 17-Jul-19 08:00 23-Jul-19 17:00 6.38 Days
Continuous		 834S 902T Three Creeks Project Install the foundations and A-Frame for the new 240 kV bays  
SUNCOR 22-Jul-19 08:00 26-Jul-19 18:00 4.42 Days
Continuous		 29EDD-1 Millennium 5 year maintenance  
SUNCOR 12-Aug-19 08:00 30-Aug-19 18:00 18.42 Days
Continuous		 30EDD-1 5 year 624T transformer maintenance and repair  
ENMAX 19-Aug-19 08:00 13-Sep-19 16:00 25.33 Days
Continuous		 932L Line Protection Upgrade  
SUNCOR 26-Aug-19 09:00 05-Sep-19 18:00 10.38 Days
Continuous		 29PL9-14 (29EDD-56 - 29EDD-34),29PL9-15 (29EDD-56 - 29EDD-34) maintenance on bus 29PP-41F  
ATCO 28-Aug-19 07:00 02-Sep-19 17:00 5.42 Days
Continuous		 766S 701,766S 901T RAS modifications for the Pattern Lanfine WAGF project  
SUNCOR 03-Sep-19 08:00 27-Sep-19 18:00 24.42 Days
Continuous		 29EDD-56 5 year maintenance  
ALTALINK, Lethbridge 16-Sep-19 08:00 20-Sep-19 17:00 4.38 Days
Continuous		 824L (593s Lethbridge Lakeview - 618s Riverbend) replace 593S4 motorized A/B  
SUNCOR 30-Sep-19 08:00 01-Nov-19 18:00 32.42 Days
Continuous		 29PL9-5 (29EDD-1 Millennium - 29EDD-34),29PL9-6 (29EDD-1 Millennium - 29EDD-34) 5 year maintenance  
ENMAX 07-Oct-19 08:00 25-Oct-19 16:00 18.33 Days
Continuous		 24.83L Transmission Line Relocate  
ATCO 17-Oct-19 08:00 01-Nov-19 16:00 15.33 Days
Continuous		 740S 701 replace breaker and re conductor switches  
ATCO 07-Nov-19 07:00 07-Nov-19 17:00 10 Hours
Continuous		 9L93 Attach new in out station  
ENMAX 18-Nov-19 08:00 13-Dec-19 16:00 25.33 Days
Continuous		 918L Line Protection Upgrade  
ENMAX 25-Nov-19 08:00 06-Dec-19 16:00 11.33 Days
Continuous		 7.82L Line Protection Upgrade  
ATCO 05-Dec-19 08:00 19-Dec-19 16:00 14.33 Days
Continuous		 740S 704,7L20 replace breaker and re conductor switches  
ATCO 07-Dec-19 07:00 12-Dec-19 17:00 5.42 Days
Continuous		 9L93 Reroute OPGW test and commission.  
ATCO 07-Jan-20 08:00 27-Jan-20 17:00 20.38 Days
Continuous		 834S 902T Three Creeks Project
Install the 240 kV switches 		 
ATCO 13-Jan-20 08:00 17-Jan-20 17:00 4.38 Days
Continuous		 7L131 To facilitate the installation of the new 9L124 and 9L139 we need to lower 7L08, 7L131 and 7L106  
ATCO 20-Jan-20 07:00 23-Jan-20 16:00 3.38 Days
Continuous		 9L59 Outage for Garden Plain Wind Project  
ATCO 20-Jan-20 08:00 24-Jan-20 17:00 4.38 Days
Continuous		 7L106 To facilitate the installation of the new 9L124 and 9L139 we need to lower 7L08, 7L131 and 7L106  
ENMAX 03-Feb-20 08:00 14-Feb-20 16:00 11.33 Days
Continuous		 162.81L Line Protection Upgrade  
ATCO 03-Aug-20 07:00 03-Nov-20 17:00 92.46 Days
Continuous		 972S 905B Project  
SUNCOR 14-Sep-20 09:00 20-Sep-20 18:00 6.38 Days
Continuous		 29PL9-2 (29EDD-1 Millennium - 848s Ruth Lake) maintenance on 29CTT-1 in 29EDD-1  
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 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		  

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: 2018-12-12   2:47:02 PM


This document and the information contained herein are based upon information and data which by their nature contain a degree of uncertainty and are subject to change. In addition, this document may contain information and data from public sources and/or third parties, which have been assumed to be accurate and complete and have not been verified. Accordingly, the Independent System Operator, operating as the Alberta Electric System Operator (the "AESO") makes no warranty, representation or guarantee, express or implied, with respect to this document or the information contained herein, including, but not limited to, any warranty, representation or guarantee of accuracy, completeness, timeliness, reliability, availability, absence of computer virus, non- infringement, merchantability or suitability for any purpose. Under no circumstances will the AESO, its members, officers, employees, contractors or agents, or any of their respective affiliates, be liable for any errors or omissions in, or any losses, damages or claims whatsoever, whether in contract, tort or otherwise, arising from use of or reliance upon, this document or any information contained herein.

© 2009 Alberta Electric System Operator. All rights reserved