Ray Krone, a UC Davis professor emeritus of civil and environmental engineering known for designing harbors and waterways so that very little sediment accumulates, has been elected to the National Academy of Engineering. Among the highest professional distinctions accorded engineers, election to the Washington, D.C.-based organization recognizes important contributions to engineering theory and practice. Krone, who retired in 1988 after 38 years of teaching, research and administration at UC, was elected for his studies of sediment movement within harbors and estuaries by tidal currents and waves. One of the models developed by his graduate students is used now worldwide in the design of harbors and for predicting sediment movements in estuaries. Throughout his career, Krone has helped design many harbors and wharves in the northern San Francisco Bay area and has served as a consultant for major harbor projects throughout the country.