When Missouri entered the Union, its western border was established as "a meridian line passing through the middle of the mouth of the Kansas river, where the same empties into the Missouri river, thence, from the point aforesaid north, along the said meridian line, to the intersection of the parallel of latitude which passes through the rapids of the river Des Moines, making the said line correspond with the Indian boundary line." The purchase extended Missouri's western border north of the Kansas River east along the Missouri River to 95°46′ west longitude.