Map of water table in Graham County, northwestern Kansas, March 1979

A map of the water table in Graham County, prepared in collaboration with the U.S. Bureau of Reclamation, provides current (1980) information on water levels in the unconsolidated deposits. Graham County, an area of 900 square miles in northwestern Kansas, is within the rolling, moderately to well-dissected terrain on the eastern edge of the High Plains.  The eastward-flowing South Fork Solomon River separates the county into nearly equal parts.

The principal source of water for domestic, stock, municipal, and irrigation use if from wells in the shallow unconsolidated deposits. The aquifers occur chiefly in the Ogallala Formation of Miocene age and in deposits of Quaternary age.