Earthquake Risks to Utah Water and Gas Systems

by C. E. Taylor, Natl Technical Systems, Redondo, Beach, CA, USA,
P. W. McDonough, Natl Technical Systems, Redondo, Beach, CA, USA,



Document Type: Proceeding Paper

Part of: Lifeline Seismic Risk Analysis?Case Studies

Abstract:

Designed to guide local earthquake hazard reduction programs, this study estimates direct aggregate earthquake damage to Davis and Salt Lake County utilities. For making these loss estimates, higher magnitude events are assumed to be generated by the Wasatch fault zone, whereas representative lower magnitude events are modeled within the study area. Studies of surface faults, liquefaction susceptibility, and amplification potential are used to model localized expected earthquake effects. Vulnerability models from previous National Science Foundation (NSF) studies are used along with categorization of a large number of facilities. Direct damage estimates are then produced by utility company and also by microzone (township-and-range section). These estimates permit general comparisons of seismic risks among utility companies, and also among different microzones.

Subject Headings: Earthquakes | Risk management | Gas pipelines | Utilities | Seismic effects | Infrastructure vulnerability | Water pipelines | Utah | United States

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