Inside the power generation house, this is the spinning shaft of one of the generators. It is, in a word, immense. Down below, there are a series of venetian blind-like vanes that allow water in to spin the turbine. Above the shaft are the rotor and stator, charged by DC current, picking up electrons and sending the power out of the building. The current is sent through step-up transformers, routed through a switch yard, and pushed along wires to the nation's power grid. Just one of these spinning generators creates enough electricity to power the entire city of Seattle, Washington and its surrounding suburbs.