In November 2012, the Interstate 29 bridges that overpass U.S. 30 in the city of Missouri Valley were named the "Officer Philip J. Adams Memorial Bridges" in memory of Officer Philip Joseph Adams, who was killed in the line of duty.
Born in Neola, Iowa, Officer Adams (Feb. 16, 1928-March 31, 1973) began his law enforcement career with the Missouri Valley Police Department in 1958. He was employed by the Iowa State Highway Commission in 1963. Assigned badge number 58, he was serving as a traffic weight officer for the commission at the time of his death.
On March 30, 1973, Officer Adams was working a portable scale enforcement assignment. The scale was located along U.S. 30 and underneath Interstate 29. Adams was struck by a motorist while walking across U.S. 30 from his vehicle to the scale. He died from his injuries on March 31, 1973.