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Tunnels
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Photograph of Hoover Dam, circa 1932
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Photograph overlooking stream, Hoover Dam, circa 1932.
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Photograph of construction truck equipment, Hoover Dam, December 8, 1931
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Photograph of dam construction, Hoover Dam, April 12, 1932
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Photograph of construction equipment, Hoover Dam, March 23, 1932
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Photograph of dam construction, Hoover Dam, March 23, 1932
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Photograph of dam construction, Hoover Dam, March 18, 1932
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Photograph of Hoover Dam diversion tunnel, 1935-1940
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Postcard of Colorado river, 1931
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Postcard of diversion tunnel, Hoover Dam, 1931
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Photograph of the Hoover Dam during construction, 1934
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Photograph of Hoover Dam during construction, 1934
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Photograph of a penstock pipe in an adit, Hoover Dam, 1930s
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Photograph of people at diversion tunnel, Hoover Dam, circa early 1930s
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Photograph of inside of diversion tunnel, Hoover Dam, circa early 1930s
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Photograph of the tunnel looking back on stationing from 394-00 on the Las Vegas River Mountain Project, Las Vegas, Nevada, circa 1968-1971
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Postcard of the visitors' corridor in Hoover Dam, circa mid 1930s
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Postcard of the visitors' corridor at Hoover Dam, circa mid 1930s
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