Scope and field context
Project scope and field context
ATI Companies conducted a geophysical survey for CDM Corporation in the Lemkin Creek area near Lake Okeechobee to characterize subsurface hydrogeologic conditions to assist in design of planned construction of aboveground reservoirs and a storm water treatment area. The goal of the CERP project is to improve the hydrology of Lake Okeechobee and downstream receiving waters. ATI conducted a combined electrical resistivity imaging (ERI) and ground penetrating radar (GPR) study at 25 selected locations within a several thousand-acre area. The ERI methodology was used to determine lateral continuity of semi-confining and confining sediment layers from a depth range of 60 to 150 feet. The GPR methodology assessed geologic conditions to 20 feet deep in order to determine the depth to a low-hydraulic conductivity layer within the surficial aquifer. ATI also conducted GPR and ERI in select locations to determine whether wetland areas were surface expressions of karst activity or historic man-made features. Results from the geophysical investigation were correlated with results from geotechnical drilling conducted at the site.