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    Tools > Informational Postings > TransCanada Canadian Mainline > Non-Critical Notices

    TransCanada Canadian Mainline Non-Critical Notices

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    All information here is provided as a service and information is not guaranteed to be accurate. PipeRiv is not responsible for any incorrect information.

    Type Posted Effective End Identifier Status Subject Response
    Maintenance 09/03/26 09/04/26 3374724940 TC Energy Planned Maintenance September 4-September 14, 2026
    Other 09/01/26 09/01/26 3374724937 PALS Transactions - August 2026
    Maintenance 08/27/26 08/28/26 3374724932 TC Energy Planned Maintenance August 28-September 7, 2026
    Other 08/24/26 08/24/26 3374724925 Canadian Mainline Summer 2026 STFT Open Season
    Open Season 08/24/26 08/24/26 3374724924 Canadian Mainline Summer 2026 STFT Open Season
    Maintenance 08/20/26 08/21/26 3374724922 TC Energy Planned Maintenance August 21-August 31, 2026
    Other 08/20/26 08/20/26 3374724921 September 2026 Mainline Fuel Ratios Available
    Other 08/19/26 08/19/26 3374724918 UPDATE: Canadian Mainline ECOS FT-NR capacity
    Open Season 08/19/26 08/19/26 3374724917 UPDATE: Canadian Mainline ECOS FT-NR capacity
    Other 08/19/26 08/19/26 3374724916 Canadian Mainline Winter 2026/2027 Open Season for STFT
    Open Season 08/19/26 08/19/26 3374724915 Canadian Mainline Winter 2026/2027 Open Season for STFT
    Other 08/18/26 08/18/26 3374724914 Canadian Mainline Summer 2026 STFT Open Season
    Open Season 08/18/26 08/18/26 3374724913 Canadian Mainline Summer 2026 STFT Open Season
    Other 08/14/26 08/14/26 3374724911 UPDATE: Canadian Mainline Capacity Management Open Season
    Open Season 08/14/26 08/14/26 3374724910 UPDATE: Canadian Mainline Capacity Management Open Season
    Other 08/14/26 08/14/26 3374724909 Canadian Mainline Summer 2026 STFT Open Season
    Open Season 08/14/26 08/14/26 3374724908 Canadian Mainline Summer 2026 STFT Open Season
    Maintenance 08/13/26 08/14/26 3374724906 TC Energy Planned Maintenance August 14-August 24, 2026
    Other 08/10/26 08/10/26 3374724905 Mainline Posted Heat Value for July 2026
    Other 08/10/26 08/10/26 3374724903 UPDATE: Mainline Changes: ECOS & NCOS Dates & NCOS Capacity
    Open Season 08/10/26 08/10/26 3374724902 UPDATE: Mainline Changes: ECOS & NCOS Dates & NCOS Capacity
    Maintenance 08/06/26 08/07/26 3374724899 TC Energy Planned Maintenance August 7-August 17, 2026
    Other 08/06/26 08/06/26 3374724898 PALS Transactions - July 2026
    Other 08/05/26 08/05/26 3374724887 Canadian Mainline NCOS Capacity Changes
    Open Season 08/05/26 08/05/26 3374724886 Canadian Mainline NCOS Capacity Changes
    Maintenance 07/31/26 07/31/26 3374724890 TC Energy Planned Maintenance July 31-August 10, 2026
    Capacity Constraint 07/24/26 07/24/26 3374724881 Emerson Extension Line 1 Pipeline System Maintenance
    Other 07/24/26 07/24/26 3374724880 Canadian Mainline Capacity Management Open Season
    Open Season 07/24/26 07/24/26 3374724879 Canadian Mainline Capacity Management Open Season
    Maintenance 07/23/26 07/24/26 3374724872 TC Energy Planned Maintenance July 24-Aug 3, 2026
    Other 07/21/26 07/21/26 3374724852 Canadian Mainline Summer 2026 STFT Open Season
    Open Season 07/21/26 07/21/26 3374724851 Canadian Mainline Summer 2026 STFT Open Season
    Other 07/20/26 06/20/26 3374724846 August 2026 Mainline Fuel Ratios Available
    Maintenance 07/16/26 07/17/26 3374724835 TC Energy Planned Maintenance July 17-27, 2026
    Other 07/15/26 07/15/26 3374724829 Canadian Mainline Winter 2026/2027 Open Season for STFT
    Open Season 07/15/26 07/15/26 3374724828 Canadian Mainline Winter 2026/2027 Open Season for STFT
    Other 07/10/26 07/10/26 3374724823 Mainline Posted Heat Value for June 2026
    Other 07/10/26 07/10/26 3374724819 Canadian Mainline Winter 2026/2027 Open Season for STFT
    Open Season 07/10/26 07/10/26 3374724818 Canadian Mainline Winter 2026/2027 Open Season for STFT
    Maintenance 07/09/26 07/10/26 3374724815 TC Energy Planned Maintenance July 10-20, 2026
    Capacity Constraint 07/07/26 07/07/26 3374724813 Update - Station 2 Maintenance Work: Complete
    IT Bid Rate 07/06/26 07/06/26 3374724812 Mainline Minimum IT Bid Floors
    Maintenance 07/03/26 07/03/26 3374724810 TC Energy Planned Maintenance July 3-13, 2026
    Other 07/02/26 07/02/26 3374724809 Station 41 Maintenance Work
    Other 07/02/26 07/02/26 3374724808 Canadian Mainline NCOS and ECOS Offerings
    Open Season 07/02/26 07/02/26 3374724807 Canadian Mainline NCOS and ECOS Offerings
    Other 07/02/26 07/02/26 3374724806 PALS Transactions - June 2026
    Capacity Constraint 06/27/26 06/27/26 3374724801 Prairies Pipeline System - Unplanned Maintenance Update
    Maintenance 06/27/26 06/27/26 3374724800 UPDATED: TC Energy Planned Maintenance June 27-July 6, 2026
    Maintenance 06/25/26 06/26/26 3374724798 TC Energy Planned Maintenance June 26-July 6, 2026

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