Final answer:
The Hoover Dam was built to control the flow of the Colorado River, not the Mississippi River. It was constructed to generate hydroelectric power and provide irrigation for the American Southwest.
Step-by-step explanation:
The Hoover Dam was not built to control flooding on the Mississippi River.
Instead, it was built to control the flow of the Colorado River, which was causing frequent floods and droughts in the American Southwest.
The dam was constructed to divert the river, generate hydroelectric power, and provide irrigation for agricultural purposes.
It served as an important engineering project in the United States, providing electricity and water to the surrounding areas.