In the mid- to late-Nineteenth Century several individuals, most notably O. M. Wozencraft, proposed irrigating the Salton Sink by diverting a controlled gravity-fed flow of the Colorado River through the existing dry Alamo River bed [REF].
The canal intake and temporary wooden headgates (known as the Chaffey Gate) were initially located in the United States at Pilot Knob due to the availability of a solid rock foundation.