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DeVries Biggs (Mark) of Woodland, and grandfather of Ellora and Carson Biggs. His engineering career spanned 50 years in the fields of hydraulic engineering, irrigation system analysis and hydrology. He was a registered civil engineer in California, a registered professional hydrologist with the American Institute of Hydrology and a life member of the American Society of Civil Engineers. He began working at UC Davis in 1972 and served as a research engineer, engineer-in-charge of the J. Amorocho Hydraulics Laboratory.