This includes the section of the 120th meridian that is between the 42nd parallel at the Oregon border to the 39th parallel amid Lake Tahoe, and an oblique line continuing from that point southward to where the Colorado River crosses the 35th parallel.[59] Fourteen years later, Congress approved the Nevada Constitution when it was admitted as a state in 1864, which defined its western border at the forty third degree of Longitude West from Washington D.C. and its southwestern border along the oblique section of the boundary line of California. While 43 degrees of longitude west from the Washington Meridian does not really coincide with the 120 degrees longitude west of Greenwich, the 1864 Congress was of the belief that the two lines were identical; the former was abandoned nationally in 1884.