Dubuque, Iowa — Motorists traveling in eastern Dubuque County should prepare for a full road closure beginning next week as part of a culvert replacement project on Dayton Road.

According to a Dubuque County road notification, the project will close Dayton Road from Highway 52 to 239th Avenue (Jackson County line) starting Wednesday, May 20, 2026, at 7:00 a.m. The closure is expected to last approximately one day, weather permitting, with work focused on the culvert replacement at the intersection with Highway 52.

The affected segment is listed as approximately 2.25 miles long, corresponding to the work zone along what is also referenced locally as 243rd Avenue in portions of the county roadway system. During the initial phase, the road will be completely closed for the length of the work zone to allow safe completion of the culvert replacement.

Project Timeline

•  Phase 1 (Culvert Replacement): Begins Wednesday, May 20, 2026. Full closure expected for about 1 day, dependent on weather conditions.

•  Phase 2 (Asphalt Work): Scheduled for a few weeks following the initial culvert work. Additional traffic impacts are anticipated during this resurfacing phase, though details on closures or restrictions for the asphalt work have not yet been finalized.

County officials emphasize that the closure is necessary to ensure the structural integrity of the roadway and improve long-term safety and drainage in the area. Culvert replacements are routine but critical maintenance projects in rural Iowa counties, where aging infrastructure can lead to flooding risks or road failures if not addressed promptly.

Detour and Travel Advice

Drivers are urged to seek alternate routes during the closure. Those traveling between Dubuque County and Jackson County should plan to use nearby connectors such as other segments of Highway 52 or parallel county roads. Heavy equipment and construction crews will be active at the Highway 52 intersection, so motorists should exercise extra caution in the vicinity even on detour routes.

Tips for local residents and commuters:

•  Check the Dubuque County website or local road alert systems for real-time updates, as weather could shift the schedule.

•  Allow extra travel time if your commute or farm operations normally use Dayton Road.

•  Consider the project’s short initial disruption as an investment in preventing larger future closures.

This project reflects ongoing efforts by Dubuque County to maintain its extensive rural road network amid spring and summer construction seasons. Similar culvert and bridge work is common across the region as counties address infrastructure funded through local, state, and federal programs.

Further details and any updates to the timeline will be posted by Dubuque County Engineering Department as the project progresses. Motorists can contact the county for specific detour mapping or additional information.