Nuclear Accident at Three Mile Island

Nuclear Accident at Three Mile Island is a Pennsylvania historical marker in Dauphin County, dedicated 1999.

River Rd. (PA 441), S of Royalton (1 mile S of the main gate to Three Mile Island)

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On March 28, 1979, and for several days thereafter -- as a result of technical malfunctions and human error -- Three Mile Island's Unit 2 Nuclear Generating Station was the scene of the nation's worst commercial nuclear accident. Radiation was released, a part of the nuclear core was damaged, and thousands of residents evacuated the area. Events here would cause basic changes throughout the world's nuclear power industry.

TodayHistorical map

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USGS Historical Topographic Map Collection

Historical maps covering this location

1825 · Map Of Pennsylvania And New Jersey. (David Rumsey Map Collection, Stanford Libraries)
1848 · Pennsylvania. (David Rumsey Map Collection, Stanford Libraries)
1895 · Route, Gettysburg campaign. (David Rumsey Map Collection, Stanford Libraries)
1927 · Pennsylvania (David Rumsey Map Collection, Stanford Libraries)
1943 · Middletown, Pennsylvania (USGS Historical Topographic Map Collection)

Pennsylvania, 1927, covering the location of Nuclear Accident at Three Mile Island, with a pin at the marker's coordinates — Pennsylvania, 1927, covering this location. David Rumsey Map Collection, Stanford Libraries. The pin is ours, placed from the marker's coordinates.

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Marker data: Pennsylvania Historical and Museum Commission via data.pa.gov

Nuclear Accident at Three Mile Island

Historical maps covering this location

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