Water resources of Codington and Grant counties, South Dakota

Water-Resources Investigations Report 89-4147




The primary sources of surface water in Codington and Grant Counties are Lakes Kampeska and Pelican and numerous potholes in western Codington County. Seasonal variations in streamflow and lake levels are directly related to seasonal variations in precipitation and evapotranspiration. Dissolved-solids concentrations in water from streams and lakes increase as stream discharge decreases and lake levels decline. Seven aquifers in glacial-outwash deposits and two bedrock aquifers were delineated in Codington and Grant Counties. The extent of the outwash aquifers ranges from 30 sq mi for the Antelope Valley aquifer to 860 sq mi for the Altamost aquifer. The average thickness of the glacial aquifers ranges from 20 ft for the Prairie Coteau to 63 ft for the Revillo. The Big Sioux and Antelope Valley aquifers are less than 10 ft below land surface. The Veblen, Prairie Coteau, and the Lonesome Lake aquifers are less than 380 ft below land surface. The Revillo and Altamost aquifers are less than 668 ft below land surface. Reported well yields are as much as 800 gal/min for the Big Sioux, Antelope Valley, and Prairie Coteau aquifers. Predominant ions are calcium and bicarbonate in water from the Big Sioux, Antelope Valley, Prairie Coteau, Veblen, Revillo, and Lonesome Lake aquifers. Sulfate also is predominant in water from the Veblen aquifer. Average dissolved-solids concentrations in water from the aquifers range 350 to 2,120 mg/L. The two bedrock aquifers delineated are the Dakota and granite wash. The water level has declined 10 ft from 1958 to 1985. Predominant ions in water from the Dakota and granite wash aquifers are sodium and sulfate. (USGS)

Additional publication details

Publication type:
Publication Subtype:
USGS Numbered Series
Water resources of Codington and Grant counties, South Dakota
Series title:
Water-Resources Investigations Report
Series number:
Year Published:
U.S. Geological Survey ; Books and Open-File Reports [distributor],
v, 47 p. :ill. ;28 cm.