2020 Local Hazard Mitigation Plan

City of Irvine

C HAPTER 4 – T HREAT AND V ULNERABILITY The threat assessment process looks at the harm that each hazard event discussed in Chapter 3 may cause in three different areas: the physical threat to key facilities, the threat to vulnerable populations, and the threat to any other community assets.

T HREAT A SSESSMENT P ROCESS

The threat assessment process looks at the harm that Irvine may experience from a hazard event but does not consider its likelihood, so it gives equal consideration to hazards that are more likely (e.g., earthquakes, flood) as well as hazards that are less probable (e.g., aircraft incident, dam failure). The threat assessment examines three aspects of each hazard: the physical threat to Critical Facilities (CFs) and Facilities of Concern (FOC), the social threat to vulnerable populations, and the threat to any other assets that may be affected.

C RITICAL F ACILITIES AND F ACILITIES OF C ONCERN

Critical facilities consist of properties and structures that play important roles in government operations and the services they provide to the community. Examples of CFs include local government offices and yards, community centers, public safety buildings like police and fire stations, schools, and any other properties a city has deemed essential for its operations. CFs may also serve dual roles if a city designates them as points of public assembly during an emergency. CFs are often owned by the City, but many are also owned and operated privately, such as some utilities and telecommunication infrastructure. The Hazard Mitigation Planning Committee identified 213 CFs or FOC in Irvine that fall into 6 different categories based on their function or characteristics. Table 4-1 shows the number of CFs and FOC in each category, the total estimated value of the facilities in each category, and examples of the facilities in each. Appendix D has a complete list of the CFs and FOC. Figure 4-1 shows the locations of CFs and FOC in Irvine that were mapped. Some facilities were not mapped due to security concerns. The potential loss value is the total insured value of the CFs that fall within the hazard zone. It is intended to provide the ballpark estimate of the cost of replacement if the property is completely or severely damaged. The actual costs of repair could be smaller or larger than the provided estimate. The data was provided by the City’s Property Schedule , and therefore, information for facilities not owned by the City are not shown (e.g., bridges, private buildings). In some instances, replacement cost information was not made available. Where this occurs, “N/A” has been used within the table. Based on the available data provided by the City, there is a minimum of $368,522,653 worth of City-owned assets. The total potential loss value of all City-owned and non-City-owned assets is much higher but is not known due to data limitations. The greatest potential for loss among the City-owned assets comes from the Bridges category, which includes underpasses and overpasses throughout the City. The next category with the greatest potential for loss is the City Vital Operations category, which includes City Hall,

Made with FlippingBook HTML5