TY - BOOK AU - Transportation Research Board AU - National Academies of Sciences, Engineering, and Medicine A2 - Glenn J. Rix A2 - Njoroge Wainaina A2 - Ali Ebrahimi A2 - Robert C. Bachus A2 - Maria Limas A2 - Rodolfo Sancio A2 - Brooke Fait A2 - Paul W. Mayne TI - Manual on Subsurface Investigations DO - 10.17226/25379 PY - 2019 UR - https://nap.nationalacademies.org/catalog/25379/manual-on-subsurface-investigations PB - The National Academies Press CY - Washington, DC LA - English KW - Transportation and Infrastructure AB - TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 258: Manual on Subsurface Investigations provides an update to the American Association of State Highway Transportation Officials (AASHTO) 1988 manual of the same name. This report reflects the changes in the approaches and methods used for geotechnical site characterization that the geotechnical community has developed and adopted in the past thirty years. The updated manual provides information and guidelines for planning and executing a geotechnical site investigation program. It may also be used to develop a ground model for planning, design, construction, and asset management phases of a project. ER -