Resolution No. 5303 - Laserfiche WebLink

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Eugene -Springfield Area Natural Hazards Mitigation Plan 2. Hazard Descriptions The CSZ scenario model is based on a potential 9.0 magnitude earthquake generated off the Oregon coast. The model does not consider atsunami, which would likely develop from the earthquake incident. The magnitude 6.5 arbitrary crustal earthquake scenario model does not look at a single earthquake (as in the CSZ model). It encompasses many faults, each with a 2% chance of producing an earthquake in the next 50 years. The model assumes each fault will produce a single "average" earthquake during this time. The models contain a high degree of uncertainty and should be used only for general planning purposes. Though these models were considered when evaluating the risk from earthquakes to the Eugene -Springfield area, they need to be updated to include local infrastructure data. The existing earthquake loss models are found in the 2014 Eugene -Springfield NHMP as well as the 2015 Oregon NHMP. Updated studies will be pursued by DOGAMI and the Cities for the 2025 NHMP update. Eugene and Springfield categorize the probability of a Cascadia Subduction Zone (CSZ) earthquake or intraplate and crustal earthquakes as moderate. Vulnerability to an earthquake is high while capacity to deal with such incidents is low. The overall risk rating to earthquakes is very high. For a summary of Impact Risks see Table 2-4. Table 2-4 Earthquake - Impact Risks cident Rankin Civil Unrest Moderate Dam or Levee Failure Low Epidemic Moderate Hazardous Materials High 2.3.8 Existing Hazard Mitigation Activities Eugene and Springfield have taken steps to mitigate earthquake risks. Efforts include: • Enforcing of the International Building Codes and Oregon Structural Specialty Code, both of which address earthquake mitigation measures for new construction. • Creating and training a Damage Assessment team for evaluating structural damage to buildings and bridges after an earthquake. This team includes staff members from Lane County, Eugene, and Springfield. • Moving the City of Eugene police, fire, City management, and administration functions out of City Hall due to the building's seismic deficiency. Eugene is currently in the process of designing a new City hall. • Constructing an enlarged, seismically sound, emergency operations center (EOC) with a larger generator and increased food, water, and fuel storage. 2-19 January 2020