Records of wells and chemical analyses of ground water in Charles Mix and Douglas counties, South Dakota

Abstract

The U.S. Geological Survey, in cooperation with the South Dakota Department of Environment and Natural Resources, maintains a data base of information on water resources in the State of South Dakota. The ground-water site data for Charles Mix and Douglas Counties are presented in two tables, with the data organized by county and location. The chemical data for ground-water sites also are located in a table, organized by geologic unit and location. INTRODUCTION A multiple-year investigation was concluded in 1975 to determine the geology and water resources of Charles Mix and Douglas Counties in eastern South Dakota (fig. 1). The investigation, accomplished at the request of Charles Mix and Douglas Counties and the Fort Randall Conservancy Sub-District, was a cooperative effort by the South Dakota Geological Survey (SDGS) and the United States Geological Survey (USGS). A series of four reports were published by the SDGS and the USGS to summarize the findings of the investigation. The previously published reports include: Sand and gravel resources in Charles Mix and Douglas Counties, South Dakota (Hedges, 1972); Major aquifers in Charles Mix and Douglas Counties, South Dakota (Kume, 1972); Geology and water resources of Charles Mix and Douglas Counties, South Dakota, Parti: Geology (Hedges, 1975), and PartII: Water resources (Kume, 1977). Since the original investigation was completed, the USGS has cooperated with SDGS in a process of reviewing and verifying the original well, test-hole, and water-quality data. Furthermore, additional data have been collected. The purpose of this report is to compile existing well, test-hole, and chemical data for Charles Mix and Douglas Counties in one document. COMPUTER DATA BASES Physical, hydrologic, and geologic data for wells and test holes have been entered into computer storage in the Ground-Water Site-Inventory (GWSI) File of the U.S. Geological Survey's National Water Data Storage and Retrieval System (WATSTORE). The GWSI File is the national repository for data from sites where ground water has been, is, or can be withdrawn. Chemical data for ground water have been entered into computer storage in the Water-Quality File of WATSTORE. Water-quality data consisting of chemical, physical, biological, and radiochemical parameters are stored in the Water-Quality File. The Water Resources Division of the USGS maintains these WATSTORE data bases. In addition to its data processing, storage, and retrieval capabilities, WATSTORE has the capability of providing Computer Data Bases 1