Noble Lovely Prentis, A History of Kansas — Chapter 1
“ The average elevation above sea level of the eastern end is about 850 feet, with Bonita, 1,075 feet above, as the highest point, and the Union Depot at Kansas City, 750 feet, the lowest. The northern boundary line rises steadily and uniformly westward from the Missouri river. The southern boundary rises and falls. At Coffeyville, the elevation is 734 feet, sixteen feet lower than at Kansas City. At the point of crossing the Flint Hills west of Independence, the elevation is 1,700 feet, declining to the westward. The elevation at Arkansas City is 1,066 feet. ”
