10. Shasta Dam
Capacity: 4,552,000
Reservoir: Lake Shasta
State: California
Construction of the dam began in 1935, and it was completed in 1945. People living in the nearby were extremely grateful for job opportunities after the Great Depression, but today the area is one of the most popular vacation spots. The Shasta Dam is spreading across the Sacramento River, and its height is impressive – 602 feet, which makes it the eighth tallest dam in the States. As for the power, it has been upgraded recently to be 98% efficient.