Abstract Frederick Cecil Finkle (1865-1949) was an engineer and geologist who worked as Chief Engineer, Consulting Engineer, and expert in hydraulic work for at least 20 irrigation and water project companies in California, Colorado, Oregon, Washington, and Mexico. Among these were the mutual water companies in the Imperial Valley of California; the Southern California Edison Company; Arrowhead Reservoir and Power Company, Redlands and Yucaipa Land and Water Company, Mount Hood Railway and Power...