Underground Excavations in Rock deals with the geotechnical aspects of the design of underground openings for mining and civil engineering processes.

As part of a continuing effort to reduce the cost of tunneling, the Federal Highway Administration (FHWA) and the Urban Mass Transportation Administration (UMTA) sponsored a seminar on the general subject of the benefits which can accrue from the use of instrumentation in the planning, design, construction, and performance of tunnels. The seminar was held in New Orleans, Louisiana, March 24-25, 1980, and was directed towards those decision makers in transportation agencies having prime responsibility for the engineering and construction of tunnels. It was felt that by providing them with a better undestanding of the benefits which can accrue from the use of tunnel instrumentation, its use would be effectively promoted to the benefit of all members of the tunneling community. The official proceedings of the seminar are presented herein. In addition, these proceedings include a bibliography on tunnel instrumentation cross referenced with keywords, and a memorabilia section consisting of photographs taken during the seminar.