| Mission of the Geological   Survey Program | 
                  
                  
                    
                      The mission of the Geological  Survey Program is to perform scientific investigations that are designed to  generate information on South Dakota’s geologic and hydrologic resources.  Fundamental aspects of those investigations  are to include the collection, interpretation, and dissemination of geologic  and hydrologic information leading to (1) a better understanding of the geology  and hydrology of South Dakota, (2) better and easier use of the information by  government, industry, and the public for decisions related to resource  development and protection, (3) greater economic development, and (4) a better  quality of life for South Dakota’s citizens. 
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                History 
               
              
 The South Dakota Geological   Survey was established by the legislature on March 6, 1893. From 1893 to 1903,   the first State Geologist, J.E. Todd, led a pioneering effort to establish the   Survey as a State scientific institution, through various reconnaissance surveys   of the State. 
               
              
 From 1903 to 1914, under   State Geologist, Ellwood C. Perisho, the Survey continued with reconnaissance   work and expanded its role in Natural Science education, with geology being one   of several fields addressed. 
               
              
 From 1915 to 1926, the   method of work changed from reconnaissance surveys to more detailed   investigations under State Geologist, Freeman Ward. 
               
              
 From 1926 to 1957, the   Survey was under the guidance of State Geologist, E.P. Rothrock. The Great   Depression shifted the Survey's priorities to concentrate on mineral resources,   which would benefit the State. After the depression years, the Survey began to   broaden the types of geologic investigations that it undertook. 
               
              
 
 
 From 1957 to 1992, the   Survey continued to expand its investigations across the State. State Geologists Allen F. Agnew, Duncan J. McGregor, and Merlin J. Tipton, significantly   increased the number and types of cooperative investigations. 
               
              
 
 From 1992 to the present, State Geologists Cleo M. Christensen and Derric L.   Iles have concentrated efforts to complete the countywide assessments of   geologic and hydrologic resources in the eastern half of the State. With the   completion of these countywide studies nearing, an increased focus on the   protection of the State's natural resources has evolved. The Survey has begun   long term efforts to monitor the water quality of the State's shallow aquifers   as well as produce more detailed mapping of the shallow aquifers in the State.