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"Dept. of the Interior, U.S. Reclamation Service, Grand Valley Project - Colorado. Operating mechanism for regulator gates. Grand River Dam." No date specified - Grand Valley Diversion

Library of Congress, via Wikimedia Commons · Documentation compiled after 1968 · Historic American Engineering Record

"Dept. Of the Interior, U.S. Reclamation Service, Grand Valley Project - Colorado. Operating mechanism for regulator gates. Grand River Dam." No date specified.
From the archive · Library of Congress, via Wikimedia Commons · Documentation compiled after 1968 "Dept. of the Interior, U.S. Reclamation Service, Grand Valley Project - Colorado. Operating mechanism for regulator gates. Grand River Dam." No date specified - Grand Valley Diversion Historic American Engineering Record

Historic American Engineering Record, Library of Congress, Prints & Photographs Division, HAER CO-90-22; via Wikimedia Commons No known restrictions on publication. Archive record ↗ · Rights

Source Archival record · verify at Library of Congress, via Wikimedia Commons ↗

From the Historic American Engineering Record's survey of Grand Valley Diversion. The photographer's own caption is the title above.

Shows: Grand Valley Diversion as the survey found it, in the frame the survey chose.

What this does not let you conclude: The structure's present condition, or how much water it carries today; the record beside it carries the numbers. HAER surveyed what was standing, not what was decreed. HAER's compilation date; the photograph itself is undated in the record.

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