Geological-Seismological Evaluation of Earthquake Hazards at Hartwell and Clemson Upper and Lower Dams, South Carolina

Abstract : Seismic source zones have been developed for the southeastern United States that are based on the geology and historic seismicity. A floating earthquake was assigned to each source zone and earthquake motions were attenuated to Hartwell and Clemson Upper and Lower Dams. A maximum credible earthquake at each dam is a far field, MM VII (M = 5.5) earthquake. Horizontal ground motions for this earthquake are as follows: acceleration 190 cm/sec2, velocity 14 cm/sec, and duration 11 sec. Acceleration and response spectra appropriate to these values were selected and are included. Where vertical motions are considered, they may be taken at two-thirds of the horizontal. (SDW)