Geological Survey Program
Geological Survey Program
Geological Survey Program
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Hydrogeologic Assessment of the High Plains Aquifer<br />
in Tripp and Gregory Counties, South Dakota<br />
Available online in Adobe PDF or<br />
in paper format (42 x 66 inches)<br />
The map shows:<br />
• extent of the aquifer<br />
• saturated thickness of the aquifer<br />
• ground-water elevation<br />
• ground-water flow direction