Browsing Presentations - Indiana Geol. Survey by Subject "hydrology"

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  • Harper, Denver; Branam, Tracy; Shaffer, Nelson R. (2009-12-08)
    Almost 200,000 acres of Indiana are underlain by abandoned underground coal mines. Many of the voids are filled with water, representing a high-yield aquifer that may contain 170 billion gallons or more. Since 1984, the ...

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