Staff previews ASU radio‑astronomy antenna array proposal near Meteor Crater

At a study‑session briefing, Coconino County planning staff presented a proposal from Arizona State University (CEP 25‑15) to install a radio‑astronomy array and associated equipment on a roughly 10‑acre lease area of Crater Ranch north of Meteor Crater.

Staff described the project as a 64‑antenna passive array consisting of low‑profile units about five feet above ground, plus a 40‑foot equipment container and two lattice relay towers (one ~20 feet, one ~35 feet) to transmit data toward I‑40 and ultimately to ASU’s Tempe campus. Staff noted the antennas are passive radio telescopes intended for research and the site would be unmanned with operations controlled from campus.

Staff showed the site vicinity and placement plan, including a proposed underground line to the interstate relay tower, and a visual example from a similar New Mexico project. Staff said wildlife‑friendly fencing is proposed and that they anticipated minimal wildlife or visual impacts; the 35‑foot relay tower near the interstate would be comparable in height to existing power poles in the corridor.

Commissioners asked about visual simulations; staff said photo simulations were not prepared because the smaller antenna heights and separation from the highway suggested limited visibility. Staff noted that staff reviewer Zach Schwartz will present the case at the public hearing next month and that additional details will be provided then.

Why this matters: The installation supports astronomical research and involves equipment and small towers on private leased land; the placement of relay towers and any underground conduit may raise access or visual concerns from residents and roadway users.

Next steps: Staff expects a formal hearing presentation from Zach Schwartz at the planning commission public hearing in the coming month.