Boulder Dam - Boulder Dam is located in Black Canyon on the Colorado River, 30 miles southeast of Las Vegas, Nevada.  The dam is the highest in the world, rising 727 feet from bedrock.  It is 650 feet through at the base.  45 feet at the crest and 1,180 feet long over which the highway passes connecting nevada and Arizona.  The structure and its appurtenant works required five years to build and cost $120,000,000.

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