Diamond Grinding Begins on Hawthorne Avenue in Carroll County

Road work expected to cause delays for 2 weeks

Mar. 21, 2026 at 7:10pm

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Crews will begin diamond grinding a 5.5-mile stretch of Hawthorne Avenue in Carroll County, Iowa on Tuesday, March 24. The work is expected to last around 2 weeks and will involve lane closures and flaggers, leading to increased travel times for drivers.

Why it matters

Diamond grinding is a cost-effective way to smooth and extend the life of aging roads. However, the work will cause disruptions for commuters and businesses along Hawthorne Avenue during the project.

The details

The Carroll County Engineer's Office says the diamond grinding work will take place between U.S. Highway 30 and Halbur. After Hawthorne Avenue is completed, crews will move on to a 1-mile stretch of Delta Avenue, also known as the OCO. The road will remain open during construction, but flaggers and pilot cars will be used, significantly increasing travel times for about 2 weeks.

  • Construction begins on Tuesday, March 24 at 7 a.m.
  • The Hawthorne Avenue project is expected to be completed by April 10.
  • After Hawthorne, crews will move to a 1-mile stretch of Delta Avenue.

The players

Carroll County Engineer's Office

The local government agency overseeing the road construction project.

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The takeaway

This road work highlights the ongoing maintenance challenges faced by local governments as they work to keep aging infrastructure in good condition. While the diamond grinding project is a cost-effective solution, it will still cause disruptions for drivers in the area.