MASON CITY, Iowa – July 2, 2025 – The 15th Street intersection with U.S. 65/South Federal Avenue in Mason City will be closed to traffic beginning on Monday, July 7, weather permitting, according to the Iowa Department of Transportation’s Mason City construction office.
Currently, U.S. 65/South Federal Avenue is closed between 6th Street and 15th Street with the 15th Street intersection remaining open. On Monday, July 7, that will change as the 15th Street intersection will close (see map). The closure will extend south on U.S. 65/South Federal to 16th Street. The 16th Street intersection will remain open to local traffic.
U.S. 65/South Federal Avenue in Mason City is currently closed to through traffic between 6th Street and 19th Street. Once construction work is completed on the northern part of the project, the roadway between 6th Street and 10th Street will be opened to local traffic in segments during July. The Iowa DOT appreciates your patience and understanding as crews continue to finish work in these locations to prepare the roadway for traffic.
The Iowa DOT reminds motorists to drive with caution, obey the posted speed limit and other signs in the work area, and be aware that traffic fines for moving violations are at least double in work zones. As in all work zones, drivers should stay alert, allow ample space between vehicles, and wear seat belts.
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For general information about this project, contact Jason Ruter, Iowa DOT Mason City construction office, at 641-430-2367 or jason.ruter@iowadot.us.