20th Century was the Golden Period of Civil Engineering in America, and that is when most of these colossal structures were constructed.
Admired by some for energy generation, flood control, and irrigation capabilities, and held responsible by some for social and environmental destructions, here are 10 Mightiest Dams of America
Constructed in: 1936. Location: North Cascade mountain range and upper Skagit River, Washington. Dimensions: 389 feet.
Constructed in: Shasta was first authorized in the 1930s as a state undertaking Location: Sacramento River in Northern California in the United States. Dimensions: 602 feet (183 m) high
Constructed in: 1933 to 1940 Location: Montana
Constructed in: 1968 Location: Feather River east of the city of Oroville, California, in the Sierra Nevada foothills east of the Sacramento Valley. Dimensions: 770 feet
Constructed in: Between 1905 to 1910 Location: Shoshone River in the U.S. state of Wyoming Dimensions: 350 feet
Constructed in: Between 1930 and 1936 Location: Near Boulder City, Nevada Dimensions: 726 feet high and 1244 feet length
Constructed in: 1941 Location: Across a canyon at Marshall Ford on the Colorado River, 13 miles (21 km) northwest of Austin, Texas. Dimensions: 278 feet (85 m) high, 7,089 feet (2 km) long, and 213 feet (65 m) thick at the base.
Constructed in: Early 1940s. Location: Little Tennessee River in Swain and Graham counties, North Carolina Dimensions: 480 feet (150 m) high
Constructed in: 1942 Location: Columbia River Dimensions: 550 feet tall and 5223 feet wide
Constructed in: 1898. Location: Coconino County, Arizona. Dimensions: The central steel section is 184 feet long and 46 feet high and weighs 460,000 pounds.