Geological Survey Program

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Aquifer Delineation Mapping of the surface geology Mapping of the subsurface geology through drilling and well installation Measurement of water levels and water chemistry
Hydrogeologic Assessment of the High Plains Aquifer in Tripp and Gregory Counties, South Dakota Available online in Adobe PDF or in paper format (42 x 66 inches) The map shows: • extent of the aquifer • saturated thickness of the aquifer • ground-water elevation • ground-water flow direction
Page 1 and 2: Derric Iles, CPG State Geologist -
Page 3 and 4: Examples of the value and uses of g
Page 5 and 6: Example of detail on the state geol
Page 7 and 8: Draft geologic map of the Lemmon 1
Page 9 and 10: Brookings County Surface Geology 1:
Page 11 and 12: Geologic Mapping 1:24,000 scale 7.5
Page 13 and 14: Available online in Adobe PDF or sh
Page 15: 22,747 test holes and wells drilled
Page 18 and 19: A product made possible by the dril
Page 20 and 21: Assistance is provided to DENR’s
Page 22 and 23: Aquifers and Monitoring Sites in th
Page 26 and 27: Status of “Aquifer Materials” M
Page 28 and 29: Example of map detail Depth categor
Page 30 and 31: Bedrock map of eastern South Dakota
Page 32 and 33: Homestake Core Archive • The rock
Page 34: Questions

Geological Survey Program

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