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An Ankeny construction project will cause a four-week road closure.

The project on NW 5th Street started on Nov. 18 and is expected to last until mid-December.  The road will be closed between NW Boulder Brook Drive and NW Irvinedale Drive.

The road will be closed while a new box culvert under NW 5th Street is being built, as a part of the North Creek stream channel improvements project.

There will be a marked detour to navigate cars and pedestrians through the area during the construction project.