History: Rarely Seen Back of the Hoover Dam Before It Was Filled with Water in 1936.[750x600]

https://i.redd.it/kkckwr5m3pi31.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/cvhb1w/rarely_seen_back_of_the_hoover_dam_before_it_was/?utm_source=ifttt