1: 1. The Hoover Dam was completed in 1936. 2. It was built to control the mighty Colorado River.

2: 3. The dam is 726 feet tall. 4. It generates enough electricity for 1.3 million people.

3: 5. The dam holds back Lake Mead, the largest reservoir in the US. 6. It weighs over 6.6 million tons.

4: 7. The dam cost $49 million to build. 8. It's a popular tourist attraction, drawing over a million visitors each year.

5: 9. The dam was named after President Herbert Hoover. 10. It took 5 years to build the dam from start to finish.

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