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Bay Area Earthquake Impacts and Earthquake Impacts on Utilities and Transportation Systems

Bay Area Earthquake Impacts and Earthquake Impacts on Utilities and Transportation Systems. Infrastructure Interdependencies Workshop I – Utilities and Transportation Systems Danielle Hutchings, ABAG Earthquake and Hazards Program Coordinator January 31, 2012. We live in earthquake country!.

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Bay Area Earthquake Impacts and Earthquake Impacts on Utilities and Transportation Systems

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  1. Bay Area Earthquake Impacts and Earthquake Impacts on Utilities and Transportation Systems Infrastructure Interdependencies Workshop I – Utilities and Transportation Systems Danielle Hutchings, ABAG Earthquake and Hazards Program Coordinator January 31, 2012

  2. We live in earthquake country! Seven faults are capable of a M6.7 or larger earthquake. Source: USGS

  3. Earthquake Shaking – Hayward Fault

  4. Earthquake Shaking – San Andreas

  5. Regional Water and Wastewater System • 100+ water retailers • 6,000-10,000water pipeline breaks or major leaks in Hayward fault earthquake • Compared to 507 in Loma Prieta • Hetch-Hetchy aqueducts, EBMUD aqueducts, South Bay aqueduct, and numerous local pipelines cross the Hayward fault. • Improvements have been made to many of these systems at fault crossings

  6. 50 Delta levee failures in Hayward fault earthquake • Export of fresh water disrupted for several years due to a major earthquake • Some water districts lack alternative sources of water (e.g. CCWD) • Many other utilities located within the Delta Regional Water System and the Delta • 75% of water supplied by agencies that get all or part of water from the Delta or have aqueducts passing through the Delta 2004 sunny day Jones Tract levee failure Source: 2008 Delta Risk Management Strategy, ABAG 2009 Local Hazard Mitigation Plan

  7. Regional Transportation System • Eight toll bridges • 2,000 state owned and 2,000 locally owned overpasses, interchanges, smaller bridges • 20,800 miles of highways and roads • 9,000 miles of bus routes • 750 miles of bikeways • 5 commuter ferry lines

  8. Regional Transportation System • 1,700 predicted road closures • Caldecott BART tunnel expected to take 2+ years to restore full service • Major susceptibility of roads, bridge approaches, railways, airport runways, and ports to liquefaction Liquefaction Hazard – M6.9 San Andreas fault

  9. Expected Road Closures – Hayward fault

  10. Expected Road Closures – 1906 repeat

  11. Energy – Electric Power, Natural Gas and Petroleum Fuels • Most of the electric power routed to the East Bay travels through two transmission stations in Moraga and El Sobrante • Circuit breakers have all been replaced, the bushings may not be able to withstand the expected shaking • Extensive damage to gas and electric distribution system expected because of building damage, shaking and liquefaction • High proportion of customer initiated gas shut-off

  12. Economy relies heavily on communications and cyber systems Network servers are not considered essential facilities and may be housed in vulnerable buildings Loss of power will increase downtime Temporary cellular tower that can be deployed quickly Communications and IT Systems

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