Information on more than 5000 wells drilled on the Savannah River Plant, Aiken, SC, has been centralized in a computer-based file. The Well Data File includes information on the location, construction, geology, water level, yield, and current status of the wells, and the location of additional information in paper files. This computer file is a valuable resource when planning new facilities, making environmental assessments, applying for state and federal permits, and performing geological and hydrological studies. Outputs of file queries are either a one-page written summary for each well or a map of well locations.