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Marshall County engineers raise safety concerns about Knapp Avenue traffic; no immediate action

Marshall County Board of Supervisors · June 24, 2026
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Summary

County engineers reported increased traffic on Knapp Avenue between US 30 and Iowa 330 causing safety and dust issues; the Board asked staff to coordinate with Iowa DOT and consider additional traffic counts but took no formal action.

Marshall County Engineer Paul Geilenfeldt briefed the Board on increased cut-through traffic on Knapp Avenue between US 30 and Iowa Highway 330 and the safety concerns that have followed. Geilenfeldt described vehicles stopping on US 30, using shoulders to turn, performing U-turns, increased dust for adjacent landowners, and potential future damage to Knapp Avenue from the higher volumes. He said he has contacted the Iowa Department of Transportation to request information about possible interchange improvements and safety measures.

Board members discussed potential dust-control measures and the cost implications, and they asked for additional traffic counts or peak-period monitoring. No formal action was taken; Geilenfeldt will continue coordination with the Iowa DOT and return to the Board if further measures are needed.