Photograph of Black Canyon, circa early 1900s

The view of where the Hoover Dam was to be built on the Colorado River in Black Canyon. Typed onto the front of the page: "Boulder Canyon. The dam is calculated to be 200 feet wide at the base, 600 feet high above water level, 1,000 feet wide at the top and extend 130 feet below water level at bedrock. This great dam would be capable of holding a year and one-half average flow of the Colorado River. Every dollar expended in this gigantic enterprise will pass through Las Vegas, Nevada - the Gateway to the Boulder Canyon Damsite - 36 miles away. The families of many of the men employed during construction days will reside in Las Vegas which will mean an increase in population and business. The power generated by the dam will mean wonderful possibilities in agriculture and mining; a smelter, factories, and other industries which will make Las Vegas the metropolis of Nevada."