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"Looking upstream toward Boulder dam site showing outlet portals of all four diversion tunnels. Flow of Colorado River is approximately 70,000 cubic feet per second."
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"Looking upstream toward Boulder dam site showing outlet portals of all four diversion tunnels. Flow of Colorado River is approximately 70,000 cubic feet per second."

Date
1933-06-20
Archive
U.S. National Archives (via Wikimedia Commons)
Type
photograph
Original size
3,000 × 2,127 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

""Looking upstream toward Boulder dam site showing outlet portals of all four diversion tunnels. Flow of Colorado River is approximately 70,000 cubic feet per second."" (1933-06-20). U.S. National Archives, via Wikimedia Commons. Public domain. https://commons.wikimedia.org/wiki/File:Looking_upstream_toward_Boulder_dam_site_showing_outlet_portals_of_all_four_diversion_tunnels._Flow_of_Colorado..._-_NARA_-_293890.jpg

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