sentences:  Waterloo Creek (Upper Iowa River tributary)
  
  Waterloo Creek is a  tributary of the Upper Iowa River, with a watershed covering .It rises as Bee Creek in Houston County, Minnesota, southwest of the city of Spring Grove, flowing generally in a southeasterly direction, crossing into Waterloo Township in Allamakee County, Iowa, where it becomes Waterloo Creek and takes a generally north-south route to its confluence with Bear Creek, just before entering the Upper Iowa River.