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Carl J. Hoffman (1908-2004) was a CSU civil engineering graduate (1932) who spent nearly thirty years working for the U.S. Bureau of Reclamation designing dams and spillways. His accomplishments include helping to design the Hoover Dam and the Grand Coulee Dam, as well as many smaller dams throughout the West. The collection includes engineering books, manuals, design data, reports, notes, memoranda, maps, and project design summaries, focusing especially on small dams.
Jim Ruff (b. 1937) had a long career as a civil engineering professor at Colorado State University and as a consultant with a focus on hydraulic engineering. The collection documents Dr. Ruff's teaching, research, consulting work, and publications. The collection includes reports, articles, letters, drawings, maps, newspaper clippings, reference materials, data, slides, photographs, videotapes, and computer media.