Development of Long-term Sustainable Water Supplies from the Miocene Upper and Lower Brunswick Aquifers, Glynn and Bryan Counties, Georgia
Three potential aquifers in Miocene and younger sediments have been recognized in the 24-county coastal area of Georgia. The three aquifers, in descending order, are the surficial aquifer (in late Miocene to recent age sediments), and the upper and lower Brunswick aquifers (in early Miocene age sediments). Until 1997, the Miocene aquifers of coastal Georgia had received little attention as an alternative groundwater source. At this time, the Georgia Environmental Protection Division (EPD) placed restrictions on the future development of the upper Floridan aquifer system in coastal Georgia because of the threat of saltwater contamination in Savannah and Brunswick. The upper and lower Brunswick aquifers have been tested in Glynn and Bryan Counties, Georgia. A 1-million gallons per day (MGD) production well at the Golden Isles Gateway Tract near the Glynn County Airport has been in operation for over 1 year as part of the Glynn County Water Supply System. No adverse impacts to long-term water supply have been observed. Additional testing in Bryan County also produced favorable prospects for the lower Brunswick aquifer as a potential alternative water supply. Hydrostratigraphic and hydrogeologic studies currently are underway to further define the thickness, aerial extent, and hydrologic properties of the surficial, and, upper and lower Brunswick aquifers in Georgia's 24-county coastal area.