Frank Spaargaren
Frank Spaargaren (20 December 1940 – 4 October 2020) was a Dutch hydraulic engineer who was one of the main designers of the Oosterscheldekering and served as a director of the Waterloopkundig Laboratorium in Delft. == Graduation and early career == After graduating in civil engineering from Delft University of Technology in 1964, he joined the Delta service of Rijkswaterstaat, in the hydraulic department.