Iron County, UT Noise Ordinances: Aircraft Noise (2026)

Section 17.58.050 establishes five airport compatible land use overlay zones around the Cedar City regional airport, the Runway Protection Zone, Instrument Approach Zone, Approach Zone, Traffic Pattern Zone, and Airport Influence Zone, to keep noise-sensitive development compatible with airport operations. Subsection (B)(4) requires owners building new structures within the approach zone to incorporate sound attenuation measures reaching at least twenty-five decibels wherever the building serves the public, contains office space, is otherwise noise-sensitive, has a normally low noise level, or is a dwelling. This sits alongside the overlay's other approach-zone limits: subsection (B)(1) caps residential density in parts of the approach zone at one dwelling per half acre or one per five acres depending on location relative to 3000 North and Bulldog and Northfield Roads, and subsection (B)(3) requires property owners in the approach zone, instrument approach zone, or runway protection zone to grant a navigation easement to Cedar City Corporation before receiving a building permit, holding the public harmless for noise, vibration, fumes and similar effects from aircraft operations.

Subsection (C)(3) adds that any subdivision plat within those same zones must dedicate an aviation hazard easement. Although the overlay's underlying zones and boundaries derive from Federal Aviation Administration guidance referenced in Section 17.58.010, the twenty-five decibel attenuation figure and the easement and density conditions are the county's own adopted standards codified in Chapter 17.58.