U.S. Department of Transportation Publication No. FHWA-NHI-11-032 Federal Highway Administration GEC No. 3 August 2011 (Rev. 1) NHI Course No. 130094 LRFD Seismic Analysis and Design of Transportation Geotechnical Features and Structural Foundations Reference Manual Developed following: AASHTO LRFD Bridge Design Specifications 4th Ed., 2007, and 2008 and 2009 Interims AASHTO Guide Specifications for LRFD Seismic Bridge Design, 2009