Grand coulee dam light show schedule

The laser light show at Grand Coulee Dam, which began in 1989, is one of the largest light shows in the U.S.

The 37 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 4.

The Grand Coulee Dam premiered its first non-laser light show in 1957.

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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 Visitors' Arrival Center and consist of four large frame Coherent Sabre Lasers, (two 12-watt Krypton (red) and two 30-watt argon lasers (green and blue).

They are split and combined with dichroic filters and controlled with analog modulators to create full color vector images. These images are projected 1100–4000 feet onto the face of the dam as well as the third power-house which is to the far left.

The entire dam is utilized as a screen during the show.

The show includes

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