Acquiring Transmission

Available Transfer Capability (ATC) is the transmission inventory that is available over and above committed transmission uses.  BPA calculates ATC using its short-term and long-term methodologies that have been developed to reflect topology, operational reliability, load, and market considerations.  Transmission customers can acquire ATC by submitting Transmission Service Requests on BPA’s OASIS at OATI webSmartOASIS.

Transmission Availability Reports & Tools

Transmission Services provides reports and tools to assist customers as they reserve and schedule transmission.
Learn more

ATC Methodology

Learn more about BPA's Available Transfer Capability Implementation Document (ATCID), ATC and Available Flowgate Capability (AFC) Methodologies for the Planning Time Period and other information pertaining to BPA's management and calculation of ATC and AFC.
Learn more

TSR Study & Expansion Process

The TSR Study and Expansion Process (TSEP) is BPA’s process to manage and respond to long-term firm transmission requests on the BPA network. TSEP was formerly known as Network Open Season (NOS).
Learn more
view of dam

Related Links:

Latest News & Events

See all BPA events

Attachment K Meeting I

Transmission Services conducts system planning meetings in accordance with its Open Access Transmission Tariff Attachment K. These meetings provide customers and interested parties the opportunity to discuss and provide input to the studies and development of the plans of service.

Transmission Planning Reform Customer-Led Workshop

This meeting will be a customer led workshop to provide further customer led discussion on the recent announcement pausing certain processes in evaluating and responding to transmission requests across the FCRTS.