<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 . Its construction was the result of a massive effort involving thousands of workers , and cost over one hundred lives . Originally known as Boulder Dam from 1933 , it was officially renamed Hoover Dam , for President Herbert Hoover , by a joint resolution of Congress in 1947 . </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 . Its construction was the result of a massive effort involving thousands of workers , and cost over one hundred lives . Originally known as Boulder Dam from 1933 , it was officially renamed Hoover Dam , for President Herbert Hoover , by a joint resolution of Congress in 1947 . </P>
when was the hoover dam built and finished
when was the hoover dam built and finished
between 1931 and 1936
between 1931 and 1936