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The laser light show at Grand Coulee Dam, which began in 1989, is one of the largest light shows in the U.S.. The 35 minute show runs daily from Memorial Day through September 30. An addition of fireworks lights up the sky above the dam each Memorial Weekend Sunday and July 4th.
The Grand Coulee Dam premiered its first non-laser light show in 1957. Approximately 740 flood lamps near the base of the dam lit up the dam, but not enough water flooded down the spillway for the desired effect.
Lasers and Sound
Lasers for the show are projected from the nearby Visitor's Arrival Center and consist of four large-framed Coherent Lasers, two 40-watt Krypton (red) and two 40-watt Argon lasers (green and blue). They are combined to produce thousands of images onto the face of the dam. The show includes Glen Mazen voicing the character of the Columbia River which narrates the history of Columbia Basin Project, the construction of the dam, and the Indians living along its banks.