3. Oahe Dam
Capacity: 19,300,000
Reservoir: Lake Oahe
State: South Dakota
What makes this dam important, apart from its grandeur? Firstly, this construction was officially dedicated to President John F. Kennedy. The second reason is the world’s first rock tunnel boring machine (TBM). This invention was first used on this dam. Actually, the dam was the reason for its creation, which later on had a huge impact on machines replacing humans in digging tunnels.
