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  • wesTTrans - Home

    Welcome to wesTTrans! is an enhanced OASIS site serving a significant portion of the Western Interconnection. Each participating Transmission Provider maintains their own transmission tariff, but collectively they provide a common and efficient method of enhancing the transmission market within the Western Power Grid. From this single market interface, access to nearly all transmission within the West can be obtained.

    PARTICIPANT MAP (Click on a link to access Member information)


    December 15, 2016: New wesTTrans Member - WITP

    Pattern Energy (WITP) joined wesTTrans OASIS as a Transmission Provider.

    September 14, 2016: webSmartOASIS Implementation

    Cutover from webOASIS to webSmartOASIS completed.

    July 1, 2013: WestConnect - Tariff Approved

    FERC permanently accepted WestConnect’s Open Access Transmission Tariff (OATT). Hourly non-firm transmission being posted by the WestConnect Members can now be viewed and purchased through the “WestConnect Deal Wizard” - located within the wesTTrans webOASIS System under the Transactions menu.

    July 27, 2011: New wesTTrans Member - DGT

    Deseret Generation & Transmission Cooperative (DGT) joined wesTTrans OASIS as a Transmission Provider.

    July 1, 2011: WestConnect - Pricing Experiment Renewed

    FERC has approved another 2-year WestConnect Pricing Experiment. Additionally, BHCT was added in the Regional Tariff filing.

    July 14, 2008: New wesTTrans Member - BHP

    Black Hills (BHP) joined wesTTrans OASIS as a Transmission Provider.

    April 1, 2007: New wesTTrans Member - BPAT

    Bonneville Power Administration (BPAT) joined wesTTrans OASIS as a Transmission Provider.

    January 25, 2006: New wesTTrans Member - MATL

    Montana Alberta Tie (MATL) joined wesTTrans OASIS as a Transmission Provider.


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