Historical Marker
Hummelstown
Historical marker location:
1 East Main Street, Hummelstown, Pennsylvania
( Marker can be reached from East Main Street east of South Hanover Street, on the right when traveling east.)
Early History 1762-1815.
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.