PC - Hydraulic Mining In California

"PC" for Post Card. I've got a lot of old postcards from the Gold Country and though I'd share. I'll be posting some of the really interesting ones every now and again.

This one looks like it might be a scene from Malakoff Diggins, or somewhere around Dutch Flat. I'm wondering if all those monitors were turned on at the same time for the benefit of the photographer who took this picture. My guess would be yes.