The Octagonal Barn, 1903. The College's first barn, built in 1889, was this octagonal structure. The addition was built in 1892. It served as the heart of the College's 180-acre farm until 1909, when construction of a new barn was completed. In its later years, the Octagonal Barn served the College as a horse barn until it burned in September 1924.
The Beef Barn was slated to be moved further to the west in the fall of 1947, but was destroyed by fire on September 15 of that year. Spontaneous combustion of wet hay was determined to be the cause. Five head of cattle that were to be shown at the Pacific International Livestock exhibition in Portland died in the fire.
Letter from John Bennes to E. E. Wilson, Secretary of the Oregon Agricultural College Board of Regents, December 11, 1907. "Dear Sir:- I am inclosing [sic] the contract, of the Mutlnomah Mill and Construction Co., for the Cattle stables. Will you kindly send the contract that is signed to the [Oregon] Secy. of State, and have the copy signed, as soon as possible, and mail to the Multnomah Mill Co." The Multnomah Mill and Construction Company of Portland built the barn for $15,600.
Second Dairy Barn, ca. 1939. A new dairy barn was built in 1937/38 as a WPA project to replace the 1908/09 barn. This massive structure was located just south of Harrison Blvd. between 35th and 53rd Streets, on the dairy program's current site. The barn burned on February 7, 1967, attracting hundreds of onlookers.