<P> Hoover Dam is a concrete arch - gravity dam in the Black Canyon of the Colorado River , on the border between the U.S. states of Nevada and Arizona . It was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30 , 1935 , by President Franklin D. Roosevelt . Originally known as Boulder Dam from 1933 , it was officially renamed Hoover Dam by a joint resolution of Congress in 1947 . Its construction was the result of a massive effort involving thousands of workers , and cost over one hundred lives . The dam was named after President Herbert Hoover . </P>
<P> Hoover Dam is a concrete arch - gravity dam in the Black Canyon of the Colorado River , on the border between the U.S. states of Nevada and Arizona . It was constructed between 1931 and 1936 during the Great Depression and was dedicated on September 30 , 1935 , by President Franklin D. Roosevelt . Originally known as Boulder Dam from 1933 , it was officially renamed Hoover Dam by a joint resolution of Congress in 1947 . Its construction was the result of a massive effort involving thousands of workers , and cost over one hundred lives . The dam was named after President Herbert Hoover . </P>
who was president when the hoover dam was built
who was president when the hoover dam was built
Franklin D. Roosevelt
Franklin D. Roosevelt