The project is set to begin on or after May 18.
(Decatur County, Ind.) - Indiana Department of Transportation contractor Dave O'Mara Contractors, Inc. is scheduled to close U.S. 421 just north of Napoleon on or after Monday, May 18, to complete a culvert replacement project.
The project will take place approximately 3.4 miles north of State Road 229 between County Road 550 East and County Road 700 East. U.S. 421 is expected to reopen at this location in late July, weather permitting. During the closure, motorists should use the official detour route which follows S.R. 350 to S.R. 129 to S.R. 46 back to U.S. 421.
As part of this contract, additional closures will take place on U.S. 421 this year in Decatur County. INDOT will continue to provide additional information and updates via INDOT News, Facebook, and X.
This project is part of a $2.9 million contract awarded to Dave O'Mara in October 2025. INDOT reminds drivers to slow down, use extra caution, and avoid distractions when traveling in and near work zones. All work is weather-dependent, and schedules are subject to change.
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