Built in Polk County, Oregon, the outpost consisted of a wooden blockhouse, sentry box, barracks, officers’ quarters, carpenter's shop, hospital, cook houses, blacksmith shop, tables, barn, sutler’s store, and laundress quarters.1 The wood blockhouse was built to provide a refuge to settlers of the area in case of attack by the Native Americans.2 After the fort was abandoned the block house was moved from the hill it was positioned on and served as a jail in the Valley Junction area.2
Total cost to build the fort was $36,053.1 The post’s first troops were under the command of William Babcock Hazen.2 This garrison consisted of 76 men under three officers, but was reduced in 1858 to two officers and 33 enlisted men.2
Notable people
Company D of the Fourth California Infantry took over at the fort on November 11, 1861 under the command of Lyman S. Scott.3 They replaced the Ninth Infantry that was commanded by 1st Lieutenant Philip A. Owen.3 For a time between September 1863 and October 1864 the post was under the command of 2nd Lieutenant James Davison.3
Also posted at Fort Yamhill was corporal Royal A. Bensell whose journals became the award winning book, All Quiet on the Yamhill: The Civil War in Oregon by Royal A. Bensell. Edited by Gunter Barth.3
Since 2005, Fort Yamhill has served as the site for the Oregon State University historical archaeology field school. Students work to uncover the foundations of Fort-era buildings. Dr. David Brauner directs the annual field schools.