Proceedings Volume Basin And Range Province Seismic Hazards Summit

Proceedings of a conference examining the siesmic activity in the Western United States, with special attention to dangerous, or potentially dangerous, earthquare activity. Sponsored and organized by the Western States Seismic Policy Council, the Federal Emergency Management Agency, and the Nevada Bureau of Mines and Geology.

Includes seven technical sessions featuring 42 speakers (who gave 47 presentations) and 14 poster presentations. Also includes pre-summit short course titled Characterizing Hazardous Faults techniques, data needs, and analysis, a post-summit short course titled Salt Lake City's Earthquake threat and what is being done about it. U.S. Geological Survey workshop titled Evaluation of hazardous faults in the Intermountain West Region. This proceedings volume includes technical PowerPoint sessions, the short-course manual, the field-trip guidebook; results of the USGS workshop and an invited paper on luminescence dating techniques.

The purpose of these guidelines for investigating geologic hazards and preparing engineering-geology reports, is to provide recommendations for appropriate, minimum investigative techniques, standards, and report content to ensure adequate geologic site characterization and geologic-hazard investigations to protect public safety and facilitate risk reduction. Such investigations provide important information on site geologic conditions that may affect or be affected by development, as well as the type and severity of geologic hazards at a site, and recommend solutions to mitigate the effects and the cost of the hazards, both at the time of construction and over the life of the development. The accompanying suggested approach to geologic-hazard ordinances and school-site investigation guidelines are intended as an aid for land-use planning and regulation by local Utah jurisdictions and school districts, respectively. Geologic hazards that are not accounted for in project planning and design often result in additional unforeseen construction and/or future maintenance costs, and possible injury or death.

Geologic hazards are naturally occurring processes that present a risk to life and property. This report provides information for the Monroe City area, in Utah's central Sevier Valley, to reduce losses from geologic hazards. Surficial-geologic mapping provides the basis on which individual geologic hazards are identified and mapped. Alluvial-fan and basin-fill deposits cover most of the map area. Other deposits consist of colluvium, artificial fill, spring travertine, and volcanic bedrock. The geologic hazards maps show where hazards may exist. The maps should be used to inform citizens and developers of potential risks and for local government officials to make prudent land-use planning decisions. The maps are general, and site-specific studies are needed to demonstrate site suitability prior to development. Typical risk-reduction methods for these geologic hazards generally include avoidance or engineering design to reduce the risk to an acceptable level.