Can utilities recover gas processing costs through balancing accounts without pass-through proceedings? Questar Gas Co. v. Utah Public Service Commission Explained

Background and Facts

Questar Gas Company faced a significant safety hazard when the heat value of natural gas entering its southern distribution system began declining due to increased carbon dioxide content. Natural gas appliances require gas within specific Btu ranges to operate safely, and the declining values created risks of incomplete combustion and carbon monoxide production. Questar constructed a processing plant through an affiliate contract to remove CO2 and restore safe heat values, then sought to recover the processing costs through its gas balancing account 191.

Key Legal Issues

The Utah Public Service Commission denied Questar’s application, ruling that the CO2 processing costs were not eligible for recovery through account 191 because they did not qualify under the pass-through statute in section 54-7-12(3)(d). The central issue was whether account 191 operates solely as an accounting tool to implement statutory pass-through proceedings, or whether it functions as an independent rate-changing mechanism with its own procedures.

Court’s Analysis and Holding

The Utah Supreme Court reversed, holding that account 191 is a separate rate-changing mechanism independent of the pass-through statute. The Court examined the Commission’s 1979 order creating the account, which established it as “a more efficient interim rate-changing mechanism for recovering certain gas costs” rather than merely an accounting tool. The Court noted that the original order stated procedures would be “similar to” but not identical to pass-through procedures. Additionally, the Commission had previously approved use of account 191 for costs that did not qualify for pass-through treatment under the Wexpro agreement.

Practice Implications

This decision clarifies that utilities have multiple avenues for rate adjustments beyond general rate proceedings and statutory pass-through mechanisms. When agencies depart from established practices, practitioners can invoke Utah Code section 63-46b-16(4)(h)(iii) to require agencies to justify the inconsistency with facts and reasons demonstrating a fair and rational basis. The decision also reinforces that utility tariffs have the force of law and create binding procedural requirements for regulatory proceedings.