High Quality Content by WIKIPEDIA articles! The Fort Calhoun Nuclear Generating Station is a nuclear power plant located on 660 acres (270 ha) between Fort Calhoun, and Blair, Nebraska adjacent to the Missouri River between mile markers 645.6 and 646.0. The utility has an easement for another 580 acres (230 ha) which is maintained in a natural state. The power plant is owned and operated by the Omaha Public Power District of Omaha, Nebraska and normally accounts for 25 percent of OPPD`s net generation capabilities. The plant has been shut down since April 2011 because regulators have found several problems.