Construction of the two Westinghouse pressurized water reactors began in 1974. Unit 1, originally rated at 1,084 MWe, came online on April 17, 1990. Its current, 40-year operating license is valid until February 8, 2030. Unit 2, 1,124 MWe, followed on April 6, 1993 and is licensed to operate until February 2, 2033 when it has to renew its license. Unit 2 was the third-to-last power reactor to come online in the United States, followed only by Units 1 and 2 of Watts Bar Nuclear Generating Station.