Boulder Canyon Reclamation Project, Arizona and Nevada, Oct. 2, 1934. Nevada wing of the power plant as seen from the… https://www.rawpixel.com/image/12301377/image-plant-mountain-natureFree Image from public domain licenseBoulder Dam, between Arizona and Nevada, Apr. 1938. Power plant discharge from two 84-inch needle valves as seen from the… https://www.rawpixel.com/image/12301379/image-background-face-plantFree Image from public domain licensePrecast concrete flume on "C" Canal in Oregon. Length, 4300 feet; capacity 345 second-feet. September, 1941. Sourced from… https://www.rawpixel.com/image/12237065/image-sky-road-animalFree Image from public domain licenseBoulder Dam, between Arizona and Nevada, May, 1940. The intake towers are reflected like giant candles by the rising waters… https://www.rawpixel.com/image/12237074/image-frame-light-natureFree Image from public domain license