By Matthew Holloway |
Arizona Corporation Commissioner (ACC) Rachel Walden brought an amendment during the commission’s Wednesday meeting to require detailed, extensive oversight over electrical utilities. Gaining unanimous approval in a 5-0 vote, Walden pushed to ensure Arizona’s electrical grid doesn’t become a ratepayer-funded venue for green projects.
At the October 15th open meeting, Walden pushed through an amendment demanding a more granular kind of report than the industry has provided for the past 26 years, exceeding what is required under Arizona Revised Statutes. Utilities like APS and SRP already owe the ACC their ten-year forecasts under state law, but Walden’s call for more detail: business confidential filings on line congestion, load-growth hotspots, and every grid-hardening method from reconductoring to storm-proofing—are a seismic departure from the more hands-off era that preceded.
“Finding the least cost, most reliable model includes transmission, not just electricity generation. None of the answers from our state utilities today inspired any confidence in me that these issues are a priority,” Commissioner Walden told the meeting. “I am not convinced that additional build out of renewables, while also having to add firm capacity as well as back up generation, is saving Arizonans money. I know that Arizonans are concerned with these issues, especially as we head into accelerated growth in our state. The Commissioners, as elected by the public, are faced with these questions and comments almost daily, and our actions are held accountable to the public.”
The move from Walden and the ACC seems to have been carefully timed. The Thirteenth Biennial Transmission Assessment projects a 3 percent annual growth surge through 2033, significantly faster than previous forecasts, reflecting Arizona’s population boom colliding with a deluge of intermittent ‘renewable’ sources. With solar and wind flooding the system, utilities are rerouting power across state lines, inviting operational headaches from California’s aggressive decarbonization push.
“Arizonans will not bear the costs and impacts of supporting neighboring states’ Green New Deal policies,” Walden said.
Walden’s amendment mandates confidential reports on congestion and bottlenecks, where new solar farms fail to provide a consistent load or data centers increase demand, along with projections to gauge how interconnection requests ripple through the system. Supporting Commissioner Lea Márquez-Peterson’s additions, Walden is requiring complete disclosures on enhancement efforts, ensuring the ACC can vet if utilities are truly fortifying the state’s transmission system.
With major data centers like Microsoft and Google cropping up in Maricopa County, pulling gigawatts from an already strained grid, peak demand strains are a genuine concern. The disastrous 2023 heat wave that had Texas utilities scrambling is fresh in mind. Arizona is hardly immune to such issues. As renewables providers require load balancing and battery installations, the costs are passed on to ratepayers, and Walden is questioning the utilities’ math.
“Ensuring our utilities have sufficient generation capacity to serve our customers during peak demand along with a reliable transmission grid to handle that capacity is paramount,” she said. “The Commission must ensure that any transmission or generation solutions to mitigate grid concerns, such as line congestion created by the interconnections from new generation sources, or offtakes from the grid by large customers such as data centers and hyperscalers, are borne by the creators of those grid concerns, not Arizona ratepayers.”
Walden pledged to scrutinize future Biennial Assessments and Integrated Resource Plans in a distinct pivot from the ACC’s historically more hands-off stance.
“I will be watching the Biennial Transmission Assessments and Integrated Resource Plans closely, and investigating these issues in all future rate cases,” Walden concluded.
Matthew Holloway is a senior reporter for AZ Free News. Follow him on X for his latest stories, or email tips to Matthew@azfreenews.com.
