Portal Powerhouse - Applying Protex protective coating to first section of 8.5' diameter penstock pipe prior to pulling into 12' diameter pipe for second section make-up.
Southern California Edison Photographs and Negatives G. Haven Bishop (SCE) Southern California Edison Photographs and Negatives, Huntington Digital Library
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.