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<br />
<br />2021 Multijurisdictional Local Hazard Mitigation Plan
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<br />masonry buildings. The law encourages local governments to adopt local mandatory strengthening programs,
<br />delineate seismic retrofit standards, and put into place measures to reduce the number of people in unreinforced
<br />masonry buildings.
<br />
<br />According to ABAG, housing units in unreinforced masonry buildings account for only 1-percent of the total Bay
<br />Area housing stock and 2.9-percent of the total Bay Area multi-family stock.
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<br />Loss Potential
<br />Table 10-9 summarizes Hazus estimates of earthquake damage in the planning area for the four scenarios. The
<br />debris estimate includes only structural debris; it does not include additional debris that may accumulate, such as
<br />from trees. In addition, these estimates do not include losses that would occur from any local tsunamis or fires
<br />stemming from an earthquake.
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<br />Table 10-9. Estimated Impact of Earthquake Scenario Events in the Planning Area
<br /> 100-Year
<br />Probabilistic
<br />Earthquake
<br />
<br />San Andreas
<br />Fault Scenario
<br />
<br />San Gregorio
<br />Fault Scenario
<br />
<br />Butano Fault
<br />Scenario
<br />
<br />Monte Vista
<br />Fault Scenario
<br />Estimated Loss
<br />Structural $10,073,424,657 $22,126,733,755 $12,276,099,854 $4,677,853,811 $14,347,471,821
<br />Contents $4,604,600,185 $9,173,501,156 $5,192,968,440 $2,135,742,033 $6,067,256,924
<br />Total $14,678,024,842 $31,300,234,912 $17,469,068,294 $6,813,595,844 $20,414,728,745
<br />% of Total Planning Area Replacement Value 7.6% 16.3% 9.1% 3.6% 10.6%
<br />Structural Debris
<br />Tons 1,058,370 4,136,710 1,198,240 286,470 2,235,260
<br />Truckloads 42,334 165,468 47,929 11,4759 89,410
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<br />10.4.3 Critical Facilities
<br />Level of Damage
<br />Hazus classifies the vulnerability of critical facilities to earthquake as no damage, slight damage, moderate
<br />damage, extensive damage, or complete damage. Hazus was used to assign a category to each critical facility in
<br />the planning area for the assessed earthquake scenarios. Summary results are shown in Figure 10-12 through
<br />Figure 10-16.
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<br />Time to Return to Functionality
<br />Hazus estimates the time to restore critical facilities to fully functional use. Results are presented as probability of
<br />being functional at specified time increments: 1, 3, 7, 14, 30 and 90 days after the event. For example, Hazus may
<br />estimate that a facility has 5 percent chance of being fully functional at Day 3, and a 95 percent chance of being
<br />fully functional at Day 90. The analysis of critical facilities in the planning area was performed for the assessed
<br />earthquake scenarios. The results are summarized in Figure 10-17 through Figure 10-21. These figures show the
<br />average functionality for all critical facilities in each category.
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<br />10-22
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