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Supervisors authorize chair to sign two DOT agreements covering L‑34 lowering and Rosewood bridge replacement
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Summary
The board authorized the chair to sign two Iowa DOT agreements: one to lower county road L‑34 under I‑880 (2030 construction, DOT pays ramp‑terminal pavement impacts) and another to replace Rosewood bridge over I‑29 (scheduled 2028; DOT to fund reconstruction).
Pottawattamie County engineer Andy Wicks briefed the board on two Iowa Department of Transportation agreements the board authorized the chair to sign.
Agreement 2026‑C‑094 (project IMX‑880) covers DOT work to lower county road L‑34 beneath I‑880 and update off‑ramps; Wicks said the DOT will pay for pavement impacts between ramp terminals and that the work is scheduled for the 2030 construction season. He told supervisors the DOT recommended lowering L‑34 rather than raising the interstate as a more cost‑effective approach; the board agreed to authorize the chair to sign the agreement.
Agreement 2026‑C‑096 (project IMN‑O9O29…) covers replacement of the Rosewood bridge over I‑29 (Honey Creek exit). Wicks said the project is slated for 2028, that DOT will fully fund reconstruction and will maintain I‑29 traffic during work while Rosewood will be closed; no detour plan had been finalized at the briefing. The board authorized the chair to sign that agreement as well.
Supervisors asked about detour routing, hydrology and ensuring the lowered road will not create ponding; Wicks said the county will review the DOT hydrology and design details as they become available. No county funding was required for either DOT project at the time of the vote.
