Des Moines County officials press pause on finalizing wind, solar and battery rules amid dispute over setbacks, noise and testing

Des Moines County planning staff and local residents spent the bulk of the Aug. 19 supervisors meeting debating proposed design standards and permitting rules for commercial solar, battery and wind projects, without adopting final language. The discussion centered on competing approaches to setbacks (measuring from property lines versus occupied dwellings), how to define and treat cemeteries and conservation areas, frequency and method of soil testing, maximum panel or array heights for agrivoltaic uses and a target decibel limit for noise. No formal vote was taken; staff were directed to gather additional technical guidance and to bring revised language back to the board. Why it matters: the rules will determine where large renewable installations can be sited in the county and what protections neighbors will get. Supervisors and many residents said the county must balance property-rights concerns against safety, wildlife and nuisance risks. Planning staff warned that overly narrow draft language could lock the county into standards that later prove inadequate for specific sites. Planning staff presented the draft as an updated, consolidated ordinance that combines rules for wind, solar and battery storage. Jared Lasser, regional planning (county staff), said the draft includes a “blanket statement” clarifying that requirements apply “only to CSES at the time of construction” and “shall not apply if any new building infrastructure or voluntary place” is added after installation. Lasser also noted the draft allows individual property owners to sign written waivers changing setbacks for their own parcels. Residents and board members repeatedly debated whether setbacks should be measured from an occupied dwelling or from the property line. “If I have the building now, I’m gonna have that setback,” said one resident during public comment. Another resident asked, “So you’re basically saying that the property owner of the solar array has, as long as they’re there first, then that limits me as to what I can do on my property later?” Planning staff responded that a property-line setback is easier to administer and protects future uses of a parcel. “My property rights don’t start at the edge of my house. They start at the edge of my property,” one supervisor said during the discussion, arguing for a property-line standard. Jared Lasser said the county could allow waivers negotiated directly between a developer and neighboring property owners and retain a permitting process that can evaluate site‑specific risks. Environmental and operational concerns were also raised. Board members and residents asked for clear rules about whether soil sampling must be done during permitting, periodically while a project operates, and at decommissioning. The draft currently ties some testing to bond or insurance renewal cycles; several residents advocated more frequent or spot testing and for neutral third‑party laboratories. “If you detect it in the soil sooner, you may be able to have a solution so that it doesn't impact the groundwater,” a resident said. Height limits for solar arrays also drew discussion. The draft lists a 15-foot maximum in some sections; planning staff and public commenters said agrivoltaic farming systems being tested at Iowa State use higher mounts (20–25 feet) to allow crops or livestock to operate under panels. Jared Lasser said capping every panel at 15 feet could “unfairly limit” agrivoltaics; the board asked staff to propose a clear maximum (for example 25–30 feet) for agrivoltaic cases and to include definitions for when the higher height applies. Noise was another contentious topic. The draft used a weighted A-scale decibel threshold (dBA) of 55; several residents and one speaker from the Des Moines County Energy District urged a lower limit. “At 40 decibels you’re getting into annoying and irritating speech masking,” a resident said, urging a 45 dBA baseline. County staff pointed to industry practice and recommended reviewing other counties’ ordinances; the board asked staff to bring back more detailed, expert‑sourced language (including day/night distinctions and low‑frequency concerns). Other issues discussed included screening (planting vegetation to block glare), protections for conservation areas and cemeteries, lighting and aviation (FAA) compliance, insurance and decommissioning obligations, and whether the county should require third‑party environmental testing and monitoring plans. The board did not adopt final text but gave several directions to staff: follow up with an environmental engineer on soil‑testing frequency and contaminant sampling; compare county draft noise language to Henry County and other Iowa precedents; clarify definitions and waiver mechanics in the ordinance; and bring a revised draft back for further discussion. The supervisors also discussed adding a 30‑day extension to the public comment period and agreed to consider that at a subsequent meeting. The planning discussion continued until near the end of the meeting; no permit applications or variances were approved during the session. Looking ahead: staff will return with clarified definitions (participating vs. nonparticipating property, “occupied dwelling,” and “experimental” technology), recommended decibel thresholds based on external noise studies, a proposal for soil‑testing frequency and third‑party testing language, and proposed language for screening and agrivoltaic height limits. The board signaled it wants a clearer, less ambiguous draft before voting.