Name/Title
Print, PhotographicEntry/Object ID
2024.0.479Description
Photo of the construction of the bottom section of the Jawbone Siphon on the Los Angeles Aqueduct. There is a collection of buildings to the left side of the pipe, and a solitary canvas tent structure on the right. Written in the lower right hand corner is "2458."
Stamped in black ink on reverse with the Dept. of Water & Power stamp and photograph/negative number 2458.
"The most harrowing siphon work was performed in the rugged Jawbone Division under Superintendent Harvey A. Van Norman, previously chief of Wens Valley dredging operations. Its largest siphon was the 7,000-foot monster in Jawbone Canyon, where a drop of 850 feet from the grade of the conduit necessitated steel casing over an inch thick in the bottom section. While neither the stoutest nor the longest siphon on the aqueduct, the Jawbone was described, because of its thickness of steel and extreme pressure head, as "the most noteworthy pipe in the United States." -Water Seekers, pg. 45.