Yuma Quartermaster Depot - Siphon exhibit (#0910)

I had not heard of the siphon and was surprised by the technology used at the time (1912) -- and still working. This photo is of a display about the tunnel (siphon) under the Colorado River. Illustrating the size of the siphon tunnel, note that in the picture of the tunnel there is a man standing on the side of tunnel at a point that appears to be about halfway through it.