This proceedings, Geotechnical Earthquake Engineering and Soil Dynamics III, contains 116 papers presented at the 1998 Specialty Conference on Geotechnical Earthquake Engineering and Soil Dynamics sponsored by the Geo-Institute of the American Society of Civil Engineers. The conference was held in Seattle, Washington, August 3-6, 1998. This conference is the third in a series of specialty conferences that have been held at ten-year intervals. This proceedings covers a broad field of topics that includes: ground motion; seismic hazard in the Pacific Northwest; seismic hazard analysis and design motions; dynamic soil properties; cyclic behavior of soils; liquefaction; experimental verification by model testing; site characterization; ground improvement; site response; displacement-based design; dams and embankments; retaining and waterfront structures; underground structures; and non-seismic and blasting vibrations. The monograph also includes ten invited papers on Emerging Art by outstanding researchers and practitioners. These papers focus on developments in important areas of geotechnical earthquake engineering practice in the past 10 years, and on anticipated developments in the next 10 years.