This book is about the thousands of people who live in the subway, railroad, and sewage tunnels of New York City.

Site investigation is the crucial first step in design and construction, when the cost and practicality of a project are evaluated. It is also a necessary part of the investigation of building failures. This major reference work describes the organization of site investigation, the plant, sampling equipment and interpretation of results. The second edition includes new material on specification and procurement, desk studies on geophysics, sample disturbance and sampling methods, in-situ testing and laboratory testing.

Tunnels and Underground Cities: Engineering and Innovation meet Archaeology, Architecture and Art. Volume 3: Geological and geotechnical knowledge and requirements for project implementation contains the contributions presented in the eponymous Technical Session during the World Tunnel Congress 2019 (Naples, Italy, 3-9 May 2019). The use of underground space is continuing to grow, due to global urbanization, public demand for efficient transportation, and energy saving, production and distribution. The growing need for space at ground level, along with its continuous value increase and the challenges of energy saving and achieving sustainable development objectives, demand greater and better use of the underground space to ensure that it supports sustainable, resilient and more liveable cities. The contributions cover a wide range of topics, from geological and geotechnical key-factors for tunnel design, excavation geometry using digital mapping, real time monitoring systems, via geotechnical data standardization and management, to drone based deformation monitoring and Probabilistic Fault Displacement Hazard Analysis. The book is a valuable reference text for tunnelling specialists, owners, engineers, archaeologists, architects, artists and others involved in underground planning, design and building around the world, and for academics who are interested in underground constructions and geotechnics.

Go behind the scenes into little-known corners of the public record and discover how corporate America has worked hand-in-glove with the Pentagon for decades -- dreaming about, planning, and actually constructing secret underground bases. And newly-uncovered information indicates that the strangeness continues with bizarre, high-tech gadgets like portable, hand-held surgical lasers and injectable electronic IDs as small as a grain of rice!