The Iowa River Railroad (IARR) operates freight service from Ackley, Iowa to end of track 1.4 miles south of U.S. Highway 20, north of Steamboat Rock, Iowa, for a distance of about 9 miles. With its office located in Steamboat Rock, Iowa, IARR carries corn byproducts and ethanol from Pine Lake Corn Processors to the interchange with the Canadian National Railroad in Ackley, Iowa.