The state boundaries of Idaho, Utah, and Wyoming share one corner approximately 7.3 miles southwest of this location. Two corners were surveyed and marked in the 1870's. During the summer of 1871, U.S. astronomer and surveyor Daniel G. Major and a party of 11 men surveyed the Idaho-Utah boundary, using transits, chronometers, a sextant, and steel measuring chains to project a line north from Evanston to a point near the Bear River where celestial observations were made. From there, a specified distance was measured west to the intersection of the 42nd Parallel of North Latitude with the 34th Degree of Longitude west of Washington, D.C., the designated Initial Point. That point was marked by a glazed white earthen bottle placed beneath a pine post and witnessed by inscribed boulders. Three years later, in 1874, while surveying Wyoming's western boundary, U.S. astronomer and surveyor A.V. Richards found the Major Monument to be approximately 0.7 mile too far east, creating a new point for the corner common to Idaho and Utah on the Wyoming boundary. Later surveys marked this point, which became the accepted corner recognized today. A coordinated effort by local and government surveying organizations recently relocated the historic corner sites established more than a century ago, aided by the original survey records.