Residents press for stronger noise and dust controls as Geneva Rock seeks new permit; commission directs staff to draft revised CUP

The Daniel Planning Commission held an extended public hearing May 20 on Geneva Rock’s application for a conditional use permit (CUP) for a batch/concrete plant. Residents described chronic noise, intermittent high-decibel "bangs" and ongoing dust that they say wakes people at night and tracks onto property. Several residents told commissioners the existing mitigation at a nearby plant (CMC) has been insufficient and urged enforceable conditions before any new operation proceeds.

Company representatives (speaker 10) summarized a sound-study process they completed with engineers, showed modeled sound maps and described mitigation measures they propose: placing stockpiles and plant equipment to move noise sources away from homes, constructing a 15-foot berm with a concrete wall and privacy fence, installing baghouses to filter dust, using white-noise backup alarms instead of beepers, preloading operations to avoid early-morning motor starts, and implementing a dust-control plan that complies with Utah DEQ permitting. The company argued the prior CUP’s 50 dB blanket limit is unattainable given ambient conditions and proposed a 55–57 dB one-hour LAeq as a measurable standard along the south property line, plus a follow-up sound study to verify mitigation.

Residents urged additional, enforceable measures: a taller berm and/or a concrete wall (several speakers suggested 20 feet or more combined berm-plus-wall), strict limits on chipping and loud "bucket" banging between 7 p.m. and 7 a.m., mandatory rubber bumpers on loaders, a requirement that chipping and noisy activities be enclosed where possible, regular maintenance of landscaping on berms, and a public-facing complaints contact (the company said a QR code with contact information will be posted). Several speakers also asked staff to verify whether the berm area is private property and how setbacks and measurement points are defined.

Commission discussion focused on achievable and enforceable conditions: commissioners discussed raising the operational measurement standard to 57 dB LAeq (one-hour average) along a defined property line, requiring engineered local sound barriers around specific noise sources, a combined berm-plus-concrete-wall design to be approved by the commission, and operational prohibitions (no chipping or banging at night; minimize high-decibel activities between 7 p.m. and 7 a.m.). Commissioners also emphasized training and equipment modifications (bumpers, engine/shielding) to reduce operator-caused outliers.

One commissioner moved that staff draft a revised conditional use permit that preserves prior conditions but includes additional exceptions and mitigation measures discussed at the hearing (minimum 20-foot berm/wall combination with a concrete component, equipment dressing with local sound barriers, a noise standard of 57 dB LAeq measured at the south property line, and language to minimize or prohibit high-decibel activities during 7 p.m. to 7 a.m.), subject to legal review. The motion passed on a roll-call vote. The commission instructed staff to prepare enforceable draft CUP language and return it for review; the item will not be a public hearing at the next planning commission review but will be discussed by the commission.