Environmental and engineering geology study of Bridgeport Valley, Mono County, California

Abstract

The physical and engineering properties of the major rock and soil units exposed in the Bridgeport Valley area were determined by field and laboratory testing, and field observation. Several of these properties are: compressive and tensile strengths, apparent specific gravity and porosity, elastic constants, rippabllity, bulk density, activity, seismic velocity, and Atterberg Limits. The data derived from the testing was used to prepare a physical properties map of the area. Several geologic hazards have been identified or inferred to exist. The major hazards include: (1) seismic shaking and ground rupture, (2) liquefaction of water saturated, low density, sands and silts, (3) slope failure, and (4) high ground water tables.