This report contains the results of a ground-water investigation, conducted by the South Dakota Geological Survey, for the city of Hoven, Walworth County, South Dakota. Field work was conducted from May 27 to June 3, 1983, and on June 18 and 19, 1984. The investigation included the drilling of 16 rotary test holes at map locations (ML) 1 through 16 (fig. 1); the construction of six observation wells at ML 4, 7, 8, 9, 11 and 12 (fig. 1): and the collection and analysis of 10 water samples at ML 4, 7, 8, 9, 11, 12 and WL-77A. The investigation was financed by the South Dakota Geological Survey, the Oahe Conservancy Sub-District, and the city of Hoven.