Omaha Public Power District, or OPPD, is a public electric utility in the State of Nebraska. It is one of the largest publicly owned electric utilities in the United States, serving more than 352,000 customers in 13 southeast Nebraska counties. OPPD was formed in 1946 as a political subdivision of the State of Nebraska. A publicly elected eight-member Board of Directors sets rates and policies. OPPD is headquartered in Omaha. In the Summer of 2011, OPPD had its Nuclear Generating Station in Fort Calhoun shut down due to Missouri River flooding. The station was shut down for an extended period of time by Federal NRC Regulators due to serious issues at the plant. The plant started back up in December 2013.