Discharge and specific conductance were measured August 13, 1985 , during low base flow of Bear Creek in the vicinity of the Y-12 Plant on the Oak Ridge Reservation, Tennessee. Discharge of Bear Creek and its tributaries measured at specific sites ranged from 0 to 1.0 cubic foot per second. Specific conductance ranged from 225 to 7600 microsiemens per centimeter at 25 degrees Celsius. During the time of instantaneous discharge measurements, flow of Bear Creek at the continuous-record station at Highway 95 near Oak Ridge ranged from 0.59 to 0.63 cubic foot per second.