Can Utah utilities collect interim rates through energy balancing accounts? Utah Office of Consumer Services v. Public Service Commission of Utah Explained

In a significant decision for Utah utility regulation, the Utah Supreme Court ruled that the Public Service Commission exceeded its statutory authority by allowing interim rates in energy balancing account proceedings without requiring utilities to meet the full burden of proof.

Background and Facts

PacifiCorp operates under an energy balancing account (EBA) mechanism that tracks differences between estimated and actual net power costs. The Public Service Commission initially approved interim rates for the EBA process in 2011, eliminated them in 2012 due to contentious swap transaction issues, then reinstated them in 2017. When PacifiCorp sought to recover approximately $2.8 million through interim rates in 2018, the Utah Office of Consumer Services and Utah Association of Energy Users challenged the Commission’s authority to authorize such recovery.

Key Legal Issues

The central question was whether the Commission could impose interim rates as part of the EBA mechanism under Utah Code section 54-7-13.5. The Commission argued it had authority under section 54-7-12(4)(a)(ii), which governs interim rates in general rate cases, and cited broad regulatory powers under sections 54-4-1 and 54-4-4.1. The consumer groups contended this violated the EBA statute’s prohibition against altering the burden of proof.

Court’s Analysis and Holding

The Court applied correctness review to this question of law regarding agency authority. The Court rejected the Commission’s statutory interpretation, finding that section 54-7-12(4)(a)(ii) applies only to general rate cases when read in context with surrounding provisions. The Court emphasized that Utah Code section 54-7-13.5(2)(e)(ii) explicitly prohibits energy balancing accounts from altering “the electrical corporation’s burden of proof.” Since utilities must prove costs are prudently incurred by substantial evidence, allowing interim rate recovery with a lower burden violated this statutory mandate.

Practice Implications

This decision clarifies that specific statutory provisions control over general agency powers. The ruling also demonstrates that parties can establish substantial prejudice under UAPA based on sufficiently imminent future harm, not just realized injuries. For utility practitioners, the decision emphasizes the importance of statutory construction principles and the limits on agency authority even when exercising broad regulatory powers. The Court left open the possibility for legislative action to expressly authorize interim rates in EBA proceedings.