Public domain
Construction workers using tools to settle freshly-poured concrete, Shasta Dam. Shasta County, California
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineConstruction workers using tools to settle freshly-poured concrete, Shasta Dam. Shasta County, California. 1940-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.