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

Natural Hazards Mitigation PlanCity of Glendale, CaliforniaSection 6 – EarthquakesA maximum magnitude earthquake on the Verdugo fault is modeled to damage about 25bridges in the city, with 4 of them considered completely damaged. However, as before,all but 2 of the bridge locations are expected to be functional by the next day. TheRaymond and Hollywood fault earthquake scenarios model some damage to theGlendale transportation system, but less than that caused by either the Sierra Madre orVerdugo earthquakes discussed above.Table 6-11: Expected Damage to Transportation SystemsScenario System Segments inInventorySan AndreasReplacementValue for AllSegments inInventoryWith AtLeastModerateDamageWithCompleteDamageEconomicLoss ($M)>50 percentFunctionalafter 1 DayHighway Major Roads 5 $2.8 Billion 0 0 0 5Bridges 143 $419 Million 1 0 0.8 143Railways Tracks 2 $19 Million 0 0 0 2Airport Facilities 4 $8 Million 0 0 0.3 4Sierra MadreVerdugoHighway Major Roads 5 $2.8 Billion 0 0 0 5Bridges 143 $419 Million 27 5 24.4 143Railways Tracks 2 $19 Million 0 0 0 2Airport Facilities 4 $8 Million 2 0 1.8 4Highway Major Roads 5 $2.8 Billion 0 0 0 5Bridges 143 $419 Million 25 4 23.3 141Railways Tracks 2 $19 Million 0 0 0 2Airport Facilities 4 $8 Million 1 0 1.7 4RaymondHighway Major Roads 5 $2.8 Billion 0 0 0 5Bridges 143 $419 Million 13 2 12.1 143Railways Tracks 2 $19 Million 0 0 0 2Airport Facilities 4 $8 Million 1 0 1.6 4Utility Systems Damage - The HAZUS inventory for the Glendale area does not includespecifics regarding the various lifeline systems in the city, therefore, the model estimateddamage to the potable water and electric power using empirical relationships based on thenumber of households served in the area. The results of the analyses regarding thefunctionality of the potable water and electric power systems in the city for the four mainearthquakes discussed herein are presented in Table 6-12. According to the models, all of theearthquake scenarios will impact the electric power systems; thousands of households in the cityare expected to not have electric power even three days after an earthquake on any of the faultsdiscussed in this report. An earthquake on either the Sierra Madre or Verdugo fault isanticipated to leave as many as 9,000 households without electricity for more than one week.The potable water system is anticipated to do better, but nearly 8,000 households are expectedto be without water for at least 3 days after the earthquake. These results suggest that the citywill have to truck in water into some of the residential neighborhoods in the northern portion ofthe city until the damages to the system are repaired. Residents are advised to have drinking2006 PAGE 6 - 54