Adams County

Historical marker location:

Gettysburg, Pennsylvania

( Marker is at the intersection of West Middle Street and Baltimore Street (Business U.S. 15), on the right when traveling east on West Middle Street.)

Marker installed: 1981

Pennsylvania was the site of the deadliest nuclear accident in U.S. history. In 1979, a partial meltdown occurred at the Three Mile Island nuclear power plant in Harrisburg, Pennsylvania.