Two different excavation methods were used for the construction of the Los Angeles Aqueduct to Owens Valley. This photograph circa 1910 shows the use of hydraulic pressure, similar to the practice used in gold mining. Water under great pressure is used to cut into the earth.
If you're wondering about permissions and what you can do with this item, a good starting point is the "rights information" on this page. See our terms of use for more tips.
Share your story
Has Calisphere helped you advance your research, complete a project, or find something meaningful? We'd love to hear about it; please send us a message.