The Hoover Dam was the highest dam in the world when it was completed in 1935. Its base is as thick as two football fields are long. Each spillway, designed to let floodwaters pass without harming the dam itself, can handle the volume of water that flows over Niagara Falls

The smart sprinkler controller first came out in the early 1960s to control large-radius lawn sprinklers, and over the years, this product has been updated and improved.