“…The lateral model boundaries extend from the Oconee and Altamaha Rivers in Georgia to the Cape Fear River in North Carolina. As in the previous investigations (Petkewich and Campbell, 2007;Petkewich and Campbell, 2009), the focus of the current investigation is the six major aquifers within the Coastal Plain aquifer system in South Carolina and parts of Georgia and North Carolina ( fig. 4; Aucott and Speiran, 1985;Aucott, 1996) and, in particular, the Middendorf aquifer near Mount Pleasant, S.C. Land-surface altitudes range from 0 ft at the coast to more than 600 ft in the upper part of the Coastal Plain physiographic province (Aucott, 1996).…”