AZ HB2485

Lowers the threshold for power plant siting review from 100 megawatts to 25 megawatts nameplate rating, meaning smaller generating units will now require certificates of environmental compatibility.

Redefines "transmission line" to include any conductors at 115,000 volts or more spanning over one mile, measured from outside of substations/switchyards at origin to termination points.

Removes the previous requirement that transmission lines must have five or more structures to trigger siting review.

Eliminates the exclusion for structures located on substations, switchyards, or generating sites from the transmission line definition.

Establishes legislative intent recognizing the need for new electric facilities while minimizing environmental impacts and providing a single forum for siting decisions with public participation.