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​Rate Cases & Tariff Proceedings
Rate Cases
BPA establishes rates for power and transmission services in a rate proceeding, a formal evidentiary hearing process under Section 7(i) of the Northwest Power Act. Prior to the initiation of the rate case, workshops are held to review and discuss upcoming rate case issues.
Tariff Proceedings
BPA follows the requirements in Section 9 of its Open Access Transmission Tariff to set or modify the terms associated with transmission, interconnection, and ancillary and control area services across the Federal Columbia River Transmission System.
Rules of Procedure Revision Process
BPA’s Rules of Procedure Governing Rate Hearings (Rules of Procedure) govern BPA’s power and transmission rate hearings conducted under section 7(i) of the Northwest Power Act.  In 2018, BPA updated the Rules of Procedure for rate cases, expanding them to accommodate Section 212 transmission terms and conditions proceedings.
 Documents related to the revision process are posted to the Rules of Procedure Revision website.

Rate Period High Water Mark Process
As prescribed in section 4.2 and 4.3 of the Tiered Rate Methodology (TRM), the Rate Period High Water Marks (RHWM) are set by BPA in the RHWM Process prior to each power rate proceeding. The RHWM sets the maximum planned amount of power that a customer may purchase each year of the Rate Period under Priority Firm Tier 1 Rates, and other values used to calculate rates.