Prepared by the Technical Committee on Geotechnical Reports of the Underground Technology Research Council of the Construction Institute of ASCE. Sponsored by the Construction Institute of ASCE and the American Institute of Mining, Metallurgical, and Petroleum Engineers. This book examines the role of the geotechnical baseline report (GBR) as a means of allocating and managing subsurface risks associated with subsurface construction. It discusses the importance and benefit of ensuring compatibility between the GBR and other contract documents, as well as the importance of involving experienced firms and individuals in the preparation and review process. A revision and update of the previously published Geotechnical Baseline Reports of Underground Construction: Guidelines and Practices, this edition includes new chapters on the application of GBRs to other types of subsurface projects, the application of GBRs in design-build project delivery, and recommendations drawn from industry-wide lessons learned. Other topics include the organization and content of a GBR, owners' perspectives, and a discussion of the rational for the use of GBRs as a risk management tool.