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Contents Table 8-1.Mercalli Scale and Peak Ground Acceleration Comparison 8-3 Table 8-2.NEHRP Soil Classification System 8-5 Table 8-3.Recent Earthquakes Magnitude 5.0 or Larger Near Planning Area 8-11 Table 8-4.Earthquake Probabilities for the San Francisco Bay Area,2014-2043 8-18 Table 8-5. Earthquake Exposure by Municipality 8-19 Table 8-6. Estimated Earthquake Impact on Persons and Households 8-21 Table 8-7.Number of Buildings on Moderate to Very High Liquefiable Soils 8-21 Table 8-8. Age of Structures in Planning Area 8-21 Table 8-9. Loss Estimates for Calaveras Fault Scenario Earthquake 8-22 Table 8-10. Loss Estimates for Greenville Fault Scenario Earthquake 8-22 Table 8-11. Loss Estimates for Haywired Fault Scenario Earthquake 8-22 Table 8-12. Loss Estimates for Mt.Diablo Fault Scenario Earthquake 8-22 Table 8-13. Loss Estimates for North San Andreas Fault Scenario Earthquake 8-22 Table 8-14. Estimated Earthquake-Caused Debris 8-23 Table 8-15. Estimated Damage to Critical Facilities from the Calaveras Fault Scenario Earthquake 8-24 Table 8-16. Estimated Damage to Critical Facilities from the Greenville Fault Scenario Earthquake 8-24 Table 8-17. Estimated Damage to Critical Facilities from the Haywired Fault Scenario Earthquake 8-24 Table 8-18. Estimated Damage to Critical Facilities from the Mt.Diablo Fault Scenario Earthquake 8-24 Table 8-19. Estimated Damage to Critical Facilities from the San Andreas Fault Scenario Earthquake 8-25 Table 8-20. Functionality of Critical Facilities for Calaveras Fault Scenario Earthquake 8-25 Table 8-21. Functionality of Critical Facilities the Greenville Fault Scenario Earthquake 8-25 Table 8-22. Functionality of Critical Facilities for the Haywired Fault Scenario Earthquake 8-25 Table 8-23. Functionality of Critical Facilities from the Mt.Diablo Fault Scenario Earthquake 8-26 Table 8-24. Functionality of Critical Facilities from the San Andreas Fault Scenario Earthquake 8-26 Table 8-25. Developable Land in High and Very High Liquefaction Susceptibility Areas 8-27 Table 9-1. Jurisdictions and Date Joined NFIP 9-3 Table 9-2. CRS Community Status in the Planning Area 9-6 Table 9-3. FEMA Disaster Declarations for Flood Events in Alameda County 9-7 Table 9-4. Flood Events in the Tri-Valley Planning Area 9-8 Table 9-5.Area in the 1-Percent Annual Chance Flood Floodplain 9-11 Table 9-6. Probability of Future Occurrences of Flood Events 9-11 Table 9-7. Summary of Peak Discharges within the Planning Area 9-12 Table 9-8. Population Within the 10-Percent, 1-Percent and 0.2-Percent Annual Chance Flood Hazard Areas 9-14 Table 9-9. Area and Structures in the 10-Percent Annual Chance Floodplain 9-14 Table 9-10.Area and Structures in the 1-Percent Annual Chance Floodplain 9-14 Table 9-11. Area and Structures in the 0.2-Percent Annual Chance Floodplain 9-14 Table 9-12. Value of Structures in the 10-Percent Annual Chance Floodplain 9-14 Table 9-13. Value of Structures in the 1-Percent Annual Chance Floodplain 9-15 Table 9-14.Value of Structures in the 0.2-Percent Annual Chance Floodplain 9-15 Table 9-15. Land Use Within the Floodplain 9-15 Table 9-16. Critical Facilities/Infrastructure in the 10-Percent Annual Chance Floodplain 9-16 Table 9-17. Critical Facilities/Infrastructure in the 1-Percent Annual Chance Floodplain 9-16 Table 9-18. Critical Facilities/Infrastructure in the 0.2-Percent Annual Chance Floodplain 9-16 Table 9-19.Estimated Flood Impact on Persons and Households 9-18 Table 9-20.Loss Estimates for 10-Percent Annual Chance Floodplain 9-19 Table 9-21. Loss Estimates for 1-percent Annual Chance Flood 9-19 Table 9-22.Loss Estimates for 0.2-percent Annual Chance Flood 9-19 Table 9-23.Estimated Flood-Caused Debris 9-20 Table 9-24.Flood Insurance Statistics 9-20 TETRA TECH xiii