English: Tourists gather around one of the generators in the Nevada wing of the powerhouse of Boulder Dam (later Hoover Dam) to hear its operation explained.
{{Information |Description={{en|1=Tourists gather around one of the generators in the Nevada wing of the powerhouse of Boulder Dam (later Hoover Dam) to hear its operation explained.}} |Source=http://www.usbr.gov/lc/region/g5000/photolab/gallery_detail.cf
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