US 71 formerly entered Storm Lake concurrently with Iowa Highway 7 .
US 71 formerly was moved to a new alignment east of Storm Lake in 1996 to lessen travel time between Carroll and Spencer , the two largest communities on US 71 in Iowa .
US 71 formerly entered Storm Lake concurrently with Iowa Highway 7 but was moved to a new alignment east of Storm Lake in 1996 to lessen travel time between Carroll and Spencer , the two largest communities on US 71 in Iowa .