Task force proposes 1,000-foot minimum separation; residents press for independent noise studies and larger setbacks

The draft ordinance’s minimum-separation provision would require at least 1,000 feet between big data center structures and the nearest non-participating principal building, with the potential for longer distances where noise limits demand it.

"This requires at least 1,000 feet separation between big data centers structures and the nearest non participating principal building," the Chair read as the task force introduced section 6.17(c). John Hall said the 1,000‑foot figure was taken from the City of Aurora ordinance as an initial benchmark.

Public commenters said 1,000 feet is insufficient in a rural county and urged that the task force hire or consult an independent noise specialist to study the full frequency spectrum, including low‑frequency and infrasound impacts on humans, livestock and wildlife. "Low frequency noises of constant humming...can actually hide in dBA measurements," a University of Illinois ecologist said, urging frequency analysis and round‑the‑clock monitoring.

Task force members acknowledged those concerns and said the minimum setback is a starting point; they signaled they will continue to search for a noise expert and consider expanding setback language if modeling shows it is necessary.