In a Different Light: Performative ‘Power’ Generation of the Historic Light Show at Grand Coulee Dam

ABSTRACT The Grand Coulee Dam light show is an audio-visual spectacle unique to the Bureau of Reclamation and the US Federal Government. Its life began as a display of abstract-coloured lights illuminating the falling waters of the dam’s spillways. Its production spans more than 60 years of inspiring people on the history, construction and wonder that is the Grand Coulee Dam, yet the light show or Colorama development and meaning are more than just a collection of light and music. This paper presents a historic entanglement of one of the longest running lightshow displays in the United States. Using performative and assemblage theories, it argues how the light show moves from the ‘technological sublime’ (Nye 1996) towards a multiplicity of agencies of light, water, sound and the concrete of the dam enabling an electric atmosphere. Using historical accounts of the show, imagery and design specifications, the paper explores the interplay of these agencies and the ‘power’ that is exchanged. In a time where industrial heritage is celebrated for its technical acumen and national connection, the light show provides key perspectives into new theoretical avenues of illumination and hydro assemblages.