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"Trench at upstream toe of Boulder Dam foundation, looking toward Nevada side from top of Arizona bench nearly on center line. Elevation of bottom of trench, 503, marking lowest point in dam structure and fixing extreme height of dam at 729 feet."
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"Trench at upstream toe of Boulder Dam foundation, looking toward Nevada side from top of Arizona bench nearly on center line. Elevation of bottom of trench, 503, marking lowest point in dam structure and fixing extreme height of dam at 729 feet."

Date
1933-06-28
Archive
U.S. National Archives (via Wikimedia Commons)
Type
photograph
Original size
2,099 × 3,000 pixels

Public domain

Reason: public domain: USBR.

This status rests on the photo's publication history, as researched by Wikimedia Commons. Check it before commercial use.

Read from: Commons licence category: PD USBR; no CC BY, CC BY-SA, GFDL or deletion tag on the file page.

Credit line

""Trench at upstream toe of Boulder Dam foundation, looking toward Nevada side from top of Arizona bench nearly on center line. Elevation of bottom of trench, 503, marking lowest point in dam structure and fixing extreme height of dam at 729 feet."" (1933-06-28). U.S. National Archives, via Wikimedia Commons. Public domain. https://commons.wikimedia.org/wiki/File:%22Trench_at_upstream_toe_of_Boulder_Dam_foundation,_looking_toward_Nevada_side_from_top_of_Arizona_bench_nearly_on..._-_NARA_-_293905.jpg

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