Historical Marker
Greenes Division
Historical marker location:
Upper Merion Township, Pennsylvania
( Marker is on Outer Line Road, on the right when traveling west.)
Continental Army. Valley Forge December 19 1777 June 18 1778.
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.