Background
Denton Municipal Electric (Denton Electric), a municipally owned electric transmission utility operating within ERCOT, filed an application with the Public Utility Commission of Texas (PUC or Commission) in November 2021 seeking to change its wholesale transmission service rates. The application proposed two contested items: (1) a debt service coverage ratio of 1.75x, which included a 0.25x adder presumptively reasonable under the Commission’s own rate filing package (RFP) instructions at the time of filing; and (2) a general fund transfer totaling 11% of revenues, made up of a 5% franchise fee and a 6% return on investment component transferred to the City of Denton’s general fund.
During the pendency of the application, the Commission voted in October 2022 to modify its RFP and eliminate the language that the 0.25x adder was presumptively reasonable—without publishing that change in the Texas Register as required by 16 Tex. Admin. Code § 22.80. Denton Electric filed an amended application continuing to seek the 1.75x ratio. After a hearing at the State Office of Administrative Hearings, the Commission issued a final order setting the debt service coverage ratio at 1.25x (without the 0.25x adder) and excluding the 6% return on investment component as insufficiently substantiated, while approving the 5% franchise fee. The Commission also required Denton Electric to file an interim transmission cost of service proceeding within 90 days. Denton Electric sought judicial review in the district court, which reversed the Commission on the debt service coverage ratio but affirmed on the general fund transfer. Both parties cross-appealed to the Fifteenth Court of Appeals.
The Court’s Holding
The Fifteenth Court of Appeals affirmed the district court’s judgment in full on all issues.
On the debt service coverage ratio, the court agreed that the Commission’s mid-proceeding modification of the RFP was arbitrary and capricious. Rule 22.80 requires that “prior to the implementation of any . . . significant change to an existing form,” the change must be posted in the Texas Register. The Commission’s elimination of the 0.25x adder presumption was a significant change to the form—not merely a change to filing requirements, as the Commission argued. Because the Commission did not follow the required publication procedure, the unmodified RFP remained operative. Under that version, the reasonableness of a 0.25x adder to the utility’s base debt service coverage ratio was presumed, and no party introduced evidence to rebut that presumption. A presumption shifts the burden of production to the opposing party; the Commission simply offered evidence supporting a 1.25x ratio under the new RFP, not evidence rebutting the adder presumption under the old one. Because the Commission failed to rebut the presumption and Denton Electric’s substantial rights were prejudiced—the 0.25x adder on a $61.6 million debt service base means tens of millions of dollars in lost revenue—the district court correctly reversed the Commission on this issue.
On the general fund transfer, the court upheld the Commission’s exclusion of the 6% return on investment component. Although Texas Government Code § 1502.059 authorizes municipal utilities to transfer funds to the city’s general fund, that statute does not compel the Commission to allow any particular transfer as a recoverable expense in ratemaking. The Commission retains discretionary authority to disallow operating expenses it finds unreasonable or unnecessary for providing transmission service. Tex. Util. Code § 35.004(c). Because Denton Electric failed to substantiate the reasonableness of the 6% return on investment component—merely asserting it was required by city charter without explaining how it was tied to the cost of providing transmission service—the Commission was entitled to exclude it. The court rejected Denton Electric’s argument that the Commission thereby denied the city its right to earn a reasonable profit; the commission’s approved debt service coverage method already provided for a return, and Denton Electric did not explain why it was entitled to additional profit not covered by that method.
Key Takeaways
- A mid-proceeding modification to a rate filing package is a “significant change” requiring Texas Register publication under 16 Tex. Admin. Code § 22.80 regardless of whether it changes the actual filing requirements; failure to publish renders reliance on the modified form arbitrary and capricious.
- A presumption in a rate filing package shifts the burden of production: if the Commission changes its RFP but fails to rebut the presumption contained in the operative (pre-change) version, it cannot rely on the new version’s standards to deny a rate request.
- Texas Government Code § 1502.059 permits municipal utilities to transfer funds to the city’s general fund but does not compel the PUC to treat those transfers as recoverable transmission expenses; the Commission retains full authority under PURA § 35.004(c) to require substantiation of reasonableness.
Why It Matters
For utilities navigating PUC rate proceedings, Public Utility Commission v. City of Denton delivers an important procedural lesson: if the Commission amends its own administrative forms during a pending rate case without following required publication procedures, the utility is entitled to the benefit of the pre-amendment presumptions. Practitioners should audit whether any RFP or similar form changes occurred between a rate application’s filing and the Commission’s final order, and challenge those changes if they were not published in the Texas Register.
For municipal electric utilities in particular, the court’s ruling on general fund transfers reinforces that transferring funds to the city’s general fund is permissible but not automatically recoverable through transmission rates. The Commission will scrutinize the reasonableness of each component. Utilities should proactively build a record demonstrating that transfer amounts are tied to the actual cost of service—not just authorized by city ordinance or charter.