Officials with the Iowa Department of Transportation report the southbound lanes of Interstate 35 between U.S. Highway 30 and Iowa Highway 210 in Story County, are closed for emergency repair work. According to reports, part of the shoulder under construction has washed away in the rain, leading to a partial undermining of the interstate. Motorists will be detoured around the closure using U.S. 30 to U.S. 69, to Iowa 210, and then back on to I-35.