26 June 2011, an accident at the Fort Calhoun nuclear power plant resulting in the expanding Missouri River flooding into the compound.  The water hit the nuke plant’s electrical transformers, cutting off power.

Electricity is still needed to keep the spent fuel pools cool.  Plant officials say they are now running on back up generators.

Forth Calhoun officials ordered the installation of a water filled artificial levee (berm).  The Nuclear Regulatory Commission did not approve the artificial levee.  At about 1:25 am, 26 June, workers broke the water filled berm, allowing the Missouri River to flood in.

This natural disaster is the latest bad news for the Fort Calhoun nuke plant.  In April plans to refuel its reactors were halted, over concerns of flooding by the Missouri River.  Then, on 07 June, a fire broke out in one of the reactor control rooms.  An inspection two years ago revealed that plant operators were not properly prepared for a flood.