Data that Southwestern Public Service Co. used to justify the fee is "riddled with errors and unreliable,” wrote Carolyn Glick, a hearing officer at the state's Public Regulation Commission.

The Arizona Secretary of State's office determined more than 70% of the signatures were valid on a petition supporting the ballot, but opposition can still challenge individual signatures.

The decision bodes well for another major project stalled by a court challenge — the Atlantic Coast Pipeline.

A new study of successful offshore wind transmission models will focus on large-scale projects across the Atlantic in order to help guide the state's procurements.

Middle River Power is considering taking over the giant Arizona coal plant and loosely sketched its plans for regulators.