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Black Hills Hydrology Study

Digital Map Products

The Black Hills Hydrology Study was initiated in 1990 as a cooperative effort between the U.S. Geological Survey (USGS), the South Dakota Department of Environment and Natural Resources, and the West Dakota Water Development District, which represents local and county cooperators. The purpose of the study is to assess the quantity, quality, and distribution of surface water and ground water in the Black Hills area of South Dakota and to define and to develop regional hydrogeologic conceptual models of the Black Hills (Driscoll, 1992; Strobel and others, 1998). The study area includes parts of Butte, Custer, Fall River, Lawrence, Meade, and Pennington Counties in western South Dakota.

• U.S. Geological Survey Open-File Report 00-471 - Digital data sets for map products produced as part of the Black Hills Hydrology Study, Western South Dakota (28 individual GIS layers at 1:100,000 scale)
• Depth to the top of formations that contain major aquifers in the Black Hills area: (1:100,000 scale)
  • Deadwood Formation
  • Madison Limestone
  • Minnelusa Formation
  • Minnekahta Limestone
  • Inyan Kara Group
• Generalized annual yield efficiency (in percent of annual precipitation), water years 1950-98 (1:100,000 scale):
• Precipitation maps (1:100,000 scale):
  • Measured and estimated monthly precipitation values for precipitation gages in the Black Hills area, water years 1931-98
  • Isohyetal map of average annual precipitation, water years 1950-98
  • Isohyetal map of average annual precipitation, water years 1961-90
• Thickness maps for selected formations (1:100,000 scale):
  • Madison Limestone
  • Minnelusa Formation
• Saturated thickness maps for selected aquifers (1:250,000 scale):
  • Madison aquifer
  • Minnelsua aquifer