Three Mile Island

Construction of the Unit 1 reactor began on Three Mile Island in May 1968, with the production of commercial electricity beginning in 1974. Approval for the construction of the Unit 2 reactor was granted in November 1969, and it was only producing commercial electricity for less than 90 days when on March 28, 1979, a loud roar erupted from the nuclear power plant that shook windows and awakened residents in the communities on both sides of the Susquehanna River. This loud warning was the re...