Length: 5,223 feet; height above bedrock: 550 feet
Spillway width: 1,650 feet
Total concrete: 11,975,521 cubic yards
Primary function: hydropower, flood control, irrigation, fish and wildlife, recreation
One of the modern engineering wonders of the world
The first water-spill over the dam was on June 1, 1942
The Grand Coulee Dam's laser system uses four large-frame Coherent Lasers, two 40-watt Krypton (red) and two 40-watt Argon (green and blue) lasers
Source: Bureau of Reclamation
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