The dairy barn was built in 1929 for bovine brucellosis research and then housed a major part of Oregon State University's animal disease research program.
Construction of the Horse Barn, December 11, 1924. The Horse Barn, built to replace the Octagonal Barn that had burned in September 1924, was very similar in style to the Beef Barn, constructed ten years prior. Both were designed by J. V. Bennes. The three men standing near the fence are D. J. Smith, of Washington State College; William J. Gilmore, Professor of Farm Mechanics at Oregon Agricultural College; and William A. Jensen, OAC's Executive Secretary. The barn, located on Campus Way between 30th and 35th Streets, was torn down in 1971.