The Grand Coulee Dam Visitor Center was built in the late 1970s as part of the dam’s Nathaniel “Nat” Washington Power Plant expansion. It was designed by architect Marcel Breuer to resemble a generator rotor. An evening laser light show was added in 1989. The center was retrofitted in 2004 for seismic, life-safety, and accessibility standards. The original laser equipment was replaced in 2013, and a new laser light show, “One River, Many Voices,” premiered in 2014.