In 1909 Nebraska State Surveyor Robert Harvey surveyed the Fort Mitchell site and documented the fort’s location for the Nebraska State Historical Society. Harvey’s site sketch partially shows the site. The granite Oregon Trail marker was placed on the Oregon Trail in 1923. Its original location was on the Oregon Trail, 279 feet at an azimuth of 289 degrees to the northwest from the brass cap below. Both markers were originally installed on the north shoulder of the highway and were relocated to this site in 2012. The northwest corner of Fort Mitchell is located 127 feet at an azimuth of 191 degrees to the southwest from the brass cap. The Fort Mitchell site was probably obliterated and used for embankment for the west highway approach to the Concrete Arch River Bridge in 1920.