Describes the dam and how it was built.

"At the time of its completion in 1936, Hoover Dam was the biggest dam in the world and the largest feat of architecture and engineering in the country—a statement of national ambition and technical achievement. It turned the wild Colorado River into a tame and securely managed water source, transforming millions of acres of desert into farmland while also providing water and power to the fast-growing population of the Southwest. The concrete monolith...