Pouring concrete into forms for the construction of a water reservoir, Mount Wilson. Two unidentified construction workers hold a wheelbarrow and pour concrete into the wooden forms around the perimeter of the reservoir site. 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 Reservoirs Construction Trees Photographic prints. (gmgpc)
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