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Planning staff details proposed CCS ordinance: notification, noise caps and emergency plans

Cass County Commissioners · June 15, 2026
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Summary

Planning staff reviewed proposed ordinance provisions for carbon capture projects including plume notifications, seismic testing limits, monitoring-well placement, noise limits and requirements for operations, maintenance and emergency response plans.

Aaron, a planning department staff member, presented the county's proposed ordinance language for carbon capture and sequestration projects and read required operational safeguards into the record. “Documents included but not limited to all state federal permits, submittals, studies, and reporting must be met and made available to the planning department and county commissioners upon request,” Aaron said.

The ordinance would require that seismic testing be limited to 7 a.m.–7 p.m., that developers obtain a road‑use agreement before seismic work begins, and that residents within the defined plume area be notified and compensated where seismic testing causes damage. Aaron also outlined noise limits: a CCS' post-construction noise shall be no greater than 60 decibels at the nearest property line or 45 decibels at a residence, whichever is more restrictive. Monitoring wells must be located entirely on the property hosting them, and injection sites (excluding security fencing) must be set back 250 feet from property lines, residences, roads and water sources. An operation and maintenance plan, plus emergency response and training plans for fire departments, must be approved by the commissioners before permitting.