 The National Route reenters Iowa on the Julien Dubuque Bridge (US 20), turning north onto Iowa 946 to reach US 52.In northern Sageville, the Great River Road turns north on CR C9Y, soon splitting onto Mud Lake Road, which, along with Circle Ridge Road, forms a loop back to CR C9Y in Sherrill.In Millville, the county road returns to US 52, which is followed into Guttenberg.