Des Moines Area Interstate Projects

Northeast Mixmaster Long-Term Detours

This page will have information related to long term detours that are in place for the project. Please visit Iowa DOT News to find detour information for closures lasting less than a week.


The 38th Street bridge over I-80 will be closed to traffic beginning Monday, December 2. This closure will last the duration of the project, which is approximately three years. The bridge needs to be removed so the interstate can be widened underneath. Work to rebuild the bridge is planned for winter 2026-2027. Please follow the detour on the map below during this closure.

The 38th Street bridge over I-80 Detour

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