Glendale (PDF) - Hazard Mitigation Web Portal - State of California

Natural Hazards Mitigation PlanCity of Glendale, CaliforniaSection 6 – EarthquakesShelter Requirement - HAZUS estimates that approximately 1,300 households inGlendale may be displaced due to the Verdugo earthquake modeled for this study (ahousehold contains four people, on average). About 980 people will seek temporaryshelter in public shelters. The rest of the displaced individuals are anticipated to seekshelter with family or friends. An earthquake on the Sierra Madre fault is anticipated todisplace nearly 1,200 households, with approximately 900 people seeking temporaryshelter. An earthquake on the San Andreas fault is not expected to displace anyhouseholds.ScenarioTable 6-10: Estimated Shelter RequirementsDisplacedHouseholdsPeople NeedingShort-Term ShelterSan Andreas - Mojave Segment 0 0Sierra Madre 1,179 886Verdugo 1,303 980Raymond 945 738Transportation Damage – Damage to transportation systems in the city of Glendale isbased on a generalized inventory of the region as described in Table 6-11. Roadsegments are assumed to be damaged by ground failure only; therefore, the numberspresented herein may be low given that, based on damage observed from the Northridgeand San Fernando earthquakes, strong ground shaking can cause considerable damageto bridges. Economic losses due to bridge damage are estimated at between $0.8million (for an earthquake on the San Andreas fault) to $24.4 million for an earthquakeon the Sierra Madre fault.The San Andreas fault earthquake scenario estimates that only 1 of the 143 bridges inthe study area will experience at least moderate damage, but this bridge is expected tobe more than 50 percent functional by the next day. The San Andreas earthquakescenario indicates that the Burbank airport will experience some economic losses, butthat its functionality will not be impaired.Alternatively, an earthquake on the Sierra Madre fault is expected to damage about 27bridges in the Glendale area, with 5 of them considered to be completely damaged.Temporary repairs are expected to make all but 2 of the bridge locations more than 50percent functional one day after the earthquake. Seven days after the earthquake, allbridge locations would be more than 50 percent functional. The Burbank airport isexpected to incur losses of about $1.8 million, but the airport will be functional. TheSierra Madre fault earthquake scenario is the worst-case for the transportation systemin the city. The damage to bridges as a result of earthquakes on the Sierra Madre,Verdugo and Raymond faults is illustrated in Map 6.9.2006 PAGE 6 - 52