ASU proposes 64 antenna installation near Meteor Crater for radio astronomy research

The Coconino County Planning and Zoning Commission held a study session and public hearing on April 30, 2025, to discuss several key agenda items, including a proposal for the installation of radio astronomy antennas by Arizona State University (ASU).

The primary focus of the meeting was the proposal to install 64 radio antennas, each approximately 5 feet tall, at a site located north of Meteor Crater. The project, designated as CEP 25 15, aims to enhance radio astronomy research capabilities. The installation will also include a 40-foot equipment container and two relay towers, one measuring 20 feet and another 35 feet tall. The antennas will be unmanned and operated remotely from the ASU campus in Tempe.

During the presentation, staff provided details about the site, which encompasses a 10-acre parcel on Crater Ranch. The layout includes a fenced area for the antennas and provisions for underground lines connecting to the relay towers. The project is designed to have minimal visual and environmental impact, with wildlife-friendly fencing planned around the installation. Staff noted that the height of the relay towers is comparable to existing power poles in the area, suggesting limited visibility concerns.

Commissioners raised questions regarding potential impacts on local homeowners' associations (HOAs) and the visibility of the project from the highway. Staff confirmed that there were no HOA regulations that would affect the proposal and reassured the commission that the project would not significantly impact the surrounding landscape.

The meeting concluded without any further questions from the commission, and the proposal is set to be revisited in the upcoming hearing next month. The discussions highlighted the county's commitment to supporting scientific research while addressing community concerns regarding new developments.