Construction of walls for large water reservoir, Mount Wilson Observatory. The 150-foot tower telescope is visible in the background. Several unidentified construction workers pour concrete into the formwork for the reservoir's walls. A bucket containing concrete hangs from a crane. Trees are in the surrounding area. Image courtesy of the Observatories of the Carnegie Institution for Science Collection at the Huntington Library, San Marino, California.
Walls--Design and construction Reservoirs--Design and construction Concrete construction--Formwork Concrete construction Concrete Construction workers--United States Cranes, derricks, etc Hoisting machinery Buckets Trees Photographic prints. (gmgpc)
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