Des Moines County supervisors begin detailed review of draft wind ordinance, focus on road use, wildlife monitoring and emergency cleanup

Des Moines County supervisors on Sept. 23 opened a chapter-by-chapter work session on a proposed wind-energy ordinance, focusing on road-use agreements, wildlife monitoring requirements, emergency response plans and decommissioning standards.

Regional planning staff led the presentation, telling the board the draft reorganizes Article 10 to cover construction, repowering, planned decommissioning and emergency decommissioning in one road-use chapter. The draft requires an engineer-approved road-use agreement before any oversized equipment is moved on county roads, and it would require the county engineer to inspect and issue a certificate of completion after construction, repowering or decommissioning activities conclude.

The changes also set timelines staff said were intended to balance planning needs and urgency: developers must contact the county engineer at least one year before a planned decommissioning and 30 days before targeted repowering within an operational lifespan, with an allowance for faster action in emergencies. Brian Carter (Secondary Road) said permitting would not be a typical timing barrier but urged clear emergency exceptions so operators and the county can act quickly when a damaged turbine must be removed.

The board devoted extended discussion to wildlife monitoring and mitigation (Article 11). Staff said the draft now requires licensed third-party field studies for project areas and asks operators to follow U.S. Fish and Wildlife Service land-based wind-energy guidance; monitoring should include acoustic bat monitoring, migratory bird observations, radar monitoring and raptor surveys. Chris Lee (Conservation director) submitted many of those recommended edits and supported including specific study methods in the ordinance.

Supervisors and conservation members debated metrics and triggers for mitigation. The draft includes post-construction monitoring with an annual report for three years and a mechanism requiring operators to propose mitigation if observed mortality exceeds a stated threshold in the approved plan. Several participants asked that the ordinance clarify whether the trigger would be an absolute number or a percentage above a predicted mortality rate; Brad Coats said he wanted an objective, measurable threshold rather than language like "substantial negative impact." Staff said the 25% figure referenced in the draft is meant to be 25% above the predicted rate in the operator’s plan, not 25% of a species population.

Public commenters and board members pressed staff on emergency decommissioning and cleanup. A county resident who identified himself as a mechanic described methods for taking down damaged turbines quickly — pulling towers or using controlled demolition — and warned that airborne fiberglass and soil contamination have been problems elsewhere if cleanup is delayed. The draft currently requires mitigation of imminent public danger within 30 days (removal or disassembly of affected components) and allows up to 365 days for removal or temporary secure on-site storage of debris; several supervisors said they prefer stricter "down-and-out" timing for above-ground components and asked staff to tighten the 365-day allowance for debris not immediately removed.

The draft also retains a financial-security requirement tied to decommissioning and site restoration; staff said the board had previously directed a bond-based security equal to 150% of estimated decommissioning costs to ensure funds are available for complete removal and soil restoration. The decommissioning language now calls for removal of all structural components, including below-grade components, unless a property owner signs a waiver at the time of decommissioning. The draft requires restoration of disturbed soil to conditions comparable to preconstruction, with a corn suitability rating (CSR) target of at least 95% of preconstruction CSR unless the owner waives that standard.

Board members asked staff to clarify multiple cross-references and to add a separate matrix (not necessarily in the ordinance) that summarizes timelines and triggers for planned versus emergency decommissioning. Supervisors scheduled the next work session — to address setbacks, siting and design standards, definitions and enforcement — for Oct. 7.

"We need clear, enforceable timelines for emergency removal and cleanup so neighbors aren’t left with contaminated fields or months of disruption," said one supervisor during the session. Conservation staff said more specific monitoring and mitigation language will help the county and outside agencies evaluate proposals.

The work session produced no vote; staff will update the draft to reflect the board’s direction and the county’s conservation and emergency-management comments before returning with a revised ordinance.