Econfina Creek originates in Jackson County and flows through Bay County, Washington County and back into Bay County where it enters Deer Point Lake. The Deer Point Lake surface-water drainage basin covers approximately 422 square miles (~270,000 acres) in Bay, Calhoun, Jackson and Washington counties (Figure 1). Econfina Creek itself has a surface water basin covering 275 square miles (~176,000 acres). The study area for this spring was focused on middle Econfina Creek. Previous work done by the District determined a ground water contribution area for middle Econfina Creek (Figure 2) of 149 square miles (~95,360 acres) (Richards 1997). This work illustrated the importance of the Sand Hill Lakes region in providing recharge to the Econfina Creek springs including one of the District’s five first magnitude springs — the Gainer Springs Group.