Big Creek - Mammoth Pool - [negatives marked "Void" - Soil testing - Engineer is straining aggregate in a pan and weighing the fine gravel on a balance beam scale.]
Hydroelectric power Agriculture Construction Testing
Place
Mammoth Pool (Calif.) Madera County (Calif.)
Source
Southern California Edison Photographs and Negatives Joseph Fadler (SCE) Southern California Edison Photographs and Negatives, Huntington Digital Library
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