Why is Bonneville rushing a rate case that adds $250 million to wholesale power bills?

The court order that started the clock

A district court in Oregon issued an amended preliminary injunction on March 2, 2026. The case carries docket number 3:01-cv-640-SI and the order sits at ECF No. 2674. Plaintiffs include the National Wildlife Federation, a coalition of fishing and environmental groups, and the State of Oregon. The order compels changes to dam operations on the Columbia and Snake rivers. Those changes cut hydropower output. Bonneville says it is already losing money because of the order. The agency needs a way to recover the shortfall without waiting for its next regular rate cycle. The proposal adds a Court-Ordered Operation Rate Adder (COORA) and a COORA True-Up to section II.AD of the Wholesale Power Rate Schedules and GRSPs. COORA collects extra revenue up front based on projected costs of the court-ordered operations. The True-Up reconciles actual costs against those projections after the fact. Together they function like a surcharge that self-corrects. The proceeding is limited to these two mechanisms. Bonneville is not reopening the rest of the BP-26 power or transmission rates approved by the Federal Energy Regulatory Commission on February 19, 2026.

What the numbers mean for each rate class

The agency estimates the adders will recover an additional $250 million from power rates. That translates to a 6.3 percent increase on the average effective Priority Firm Non-Slice power rate. Industrial Firm power rates would rise 5.3 percent. New Resources Firm power rates would rise 2.2 percent. These are percentage increases on the average effective rate, not on the total bill. The actual dollar impact depends on each customer's load shape and contract terms. The document does not break down the $250 million by rate class. It does not say how many customers fall into each class. It does not project the effect on retail rates that end users see.

The expedited schedule leaves little room

The prehearing conference is set for October 5, 2026, at 9 a.m. Pacific via WebEx. Petitions to intervene must be filed through Bonneville's secure website by 4:30 p.m. Pacific Prevailing Time on October 6, 2026. Written comments from non-party participants are due by October 19, 2026. The Administrator's Final Record of Decision is targeted for December 18, 2026. The Hearing Officer may compress the schedule further. Ex parte communications are prohibited from the date of this notice until the Final Record of Decision issues. That ban covers Bonneville and DOE employees, contractors, the Hearing Officer, the Hearing Clerk, and communications with customers, interest groups, Congress, and other executive agencies on the merits of the case.

Environmental review runs on a separate track

Assessment under the National Environmental Policy Act is separate from the rate proceeding. Evidence and argument about environmental impacts are excluded from the rate record. The agency believes the proposal may fit Categorical Exclusion B4.3 at 10 CFR part 1021, Appendix B. That exclusion covers rate changes based on revenue requirements where generation operations stay within normal limits. Bonneville has not finalized the NEPA determination. Comments on environmental effects go to a different address and a different deadline. They do not become part of the rate hearing record.

Where the explanation stops

The notice does not describe the specific dam operations the court ordered. It does not quantify the lost generation in megawatt-hours. It does not explain how COORA's initial projection will be calculated. It does not state whether the True-Up will carry interest. It does not say what happens if the court order is stayed or reversed on appeal. The proceeding record will fill some of those gaps. The rest remains outside the document.