AMES, IA (northwestiowanow.com) – Freezing and thawing, along with snow and moisture, have caused potholes to form on Iowa roads. Moisture gets into pavement and, during freeze-thaw cycles, causes asphalt or concrete to shift and break. As vehicles pass over weakened areas, potholes develop.

The Iowa Department of Transportation, along with local crews, are quickly patching potholes using cold-mix asphalt. Though temporary, this improves driving until warmer weather allows for permanent repairs with hot-mix asphalt or Portland cement in the spring. Crews also address cracks and deteriorating pavement during warmer months to prevent future potholes.

To report potholes on local streets or county roads, contact the city or county engineer. For potholes on interstates or U.S. highways, report them to Iowa DOT maintenance offices.