Public domain
Well workers feel the contents of drill to determine how deep they will have to dig--they must drill through mud and clay till they strike sand or gravel. Ridge well project, Saint Mary's County, Maryland
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineWell workers feel the contents of drill to determine how deep they will have to dig--they must drill through mud and clay till they strike sand or gravel. Ridge well project, Saint Mary's County, Mary. 1941-01-01. Collier, John, Jr., Collier, John. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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