Main Page | See live article | Alphabetical index Grand Coulee Dam is a hydroelectric gravity dam on the Columbia River in Washington State. Along with the Hoover Dam it is among the most famous dams in the United States. The Reservoir it backs up is called Franklin Delano Roosevelt Lake, named after the United States president who presided over the conception and completion of the dam. In the summers they project a laser light show onto the dam's wall. This article is a stub. You can help Wikipedia by fixing it. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.