Question

Between 1933 to 1947, the Hoover Dam was called what?

Answer 1

The Hoover Dam, which was completed in 1935 on the Colorado River on the border between the states of Arizona and Nevada in the United States, was originally known as the Boulder Dam. 

Answer 2

Between 1933 and 1947, the Hoover Dam was called Boulder Dam. The name was changed in 1947 to honor President Herbert Hoover, who had championed the construction of the dam. The dam is located on the Colorado River between Arizona and Nevada and is one of the largest concrete structures in the world.