About 30 miles from Las Vegas on the border of Nevada and Arizona you will find the massive Hoover Dam Hydroelectric Powerstation holding back Lake Mead. Completed in 1935 it was the largest electric power station and largest concrete structure in the world. with enough concrete to pave a two lane highway from New York to San Francisco. Tours of the power station are available daily where visitors can see and hear first hand the amazing engineering and construction feats accomplished to build this mighty structure. The power generated serves not only the glittery lights of Las Vegas but much of Arizona, Nevada and most of Southern California. Interestingly the power station dosn’t store power it just generates what is needed at the time.