The left lane of southbound Interstate 35 between U.S. 30 and Iowa 210 in Story County is now open to traffic, according to the Iowa Department of Transportation’s District 1 office. The right lane of southbound I-35 will remain closed for repairs.

Traffic was being detoured for a time, because the roadbed had been undermined and washed away in a construction zone about two miles south of U.S. Highway 30.