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South Atlantic Water Science Center - Georgia

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A jointed granite gneiss located along Highway 138 approximately 2.5 miles north of the International Horse Park. The jointed granite gniess exhibits well developed fracture openings that parallel gneissic layering.

 

ROCKDALE PROJECT LINKS

Groundwater Resources and Hydrogeology of Crystalline-Rock Aquifers in Rockdale County, North-Central Georgia project home page. Project home

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Groundwater Resources and Hydrogeology of Crystalline-Rock Aquifers in Rockdale County, North-Central Georgia

Project Chief: Lester J. Williams
Cooperator: Rockdale County
Year started: 2001

Problem

Map of the study area

Ground water in crystalline rocks of the State has not been extensively tapped as a source of public drinking water. This source, however, may prove to be a valuable resource to communities wishing to supplement their existing surface-water supplies and augment the amount of available drinking water in rapidly-growing areas of north Georgia, such as in Rockdale County (map, right). Little information is available to evaluate fully the quantity and quality of ground-water resources in the area. Because geology is the principal control on the availabilityof ground water, the U.S. Geological Survey (USGS) is conducting this study, in cooperation with Rockdale County, to determine the rock types and geologic structures that influence ground-water availability. Ultimately, this information will increase the understanding of how ground water flows through complex crystalline-rock aquifer systems and provide critical information for the future development and management of this resource.

Objectives

  • Evaluate the hydrogeology and ground-water resources of the study area.
  • Provide baseline geologic and hydrologic information for a typical crystalline-rock aquifer setting in northern Georgia.
  • Determine the hydraulic characteristics and storage potential of water-bearing zones/hydrogeologic units at various well sites.
  • Define the best methods and approaches to characterize the availability of ground water in crystalline-rock areas.
  • Develop a better understanding of crystalline-rock aquifer systems so that State and local water-management agencies can use this information when developing groundwater use policies.

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