Pouring concrete for walls of large water reservoir, Mount Wilson. Three unidentified construction workers are seen with a wheelbarrow and a shovel, pouring concrete along a wooden chute into the wooden and wire formwork. Trees are in the background. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Concrete construction--Formwork Concrete construction Concrete Construction workers--United States Wheelbarrows Shovels Lumber Walls Trees Photographic prints. (gmgpc)
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