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ATC Methodology
This site contains 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. BPA’s ATCID describes BPA’s implementation of the NERC ATC Standards, as required by NERC Standard MOD-001-1, and applies to ATC and AFC calculations for the NERC ATC Time Period (0-13 months). BPA’s ATC and AFC Methodologies for the Planning Time Period describe BPA’s methodologies for calculating ATC and AFC in the Planning Time Period (beyond 13 months).
ATC Methodologies for the NERC Horizon (0 - 13 months)
ATC Implementation Document, V70 (Effective 2/16/2022)
Map of Short-term BPA Constraints (Effective 1/26/2022)

The forms above are only for use by the specific entities identified in each form. Send all completed forms to with the name of the form in the subject line.
Transmission Service Providers can also use this mailbox to send BPA their ATCID. 
ATC Methodologies for the Planning Time Period (beyond 13 months)

 Contact Information


Send all requests or documents pertaining to specific requirements in the NERC ATC Standards to and
specify the name of the
document or request form in the subject line.

For comments or questions
about ATC and AFC, email and specify
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