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City of Santa Ana Emergency Operations Plan <br />Part I Basic Plan <br />Figure 107 Southern California Water Resources Vulnerability to Earthquakes <br />K� <br />J0 <br />2 <br />San 1 <br />Bernardino ' <br />tt <br />Pumping Plant <br />Los Angeles Aqueduct <br />California Aqueduct <br />Colorado River Aqueduct <br />San Andreas <br />QuaternaryFaults <br />Shake Hazard <br />20 <br />25 <br />30 US1HZ050 <br />1.0 second Spectral Acceleration with <br />40 10% Probability of Exceedance in 50 years <br />60 (Source: USGS - OFR-97-0131) <br />80 <br />100 <br />M <br />10 20 30 mdo <br />I I <br />Cal Poly, San Luis Obispo Sources: USGS, CA Natural Resources Agency, CA DWR <br />City and Regional Planning <br />June 2013 Created by: C. Schuldt (Annex 3. SoCal water EQ Vuln.mxd) <br />A major rupture of the southern San Andreas Fault could span more than 200 miles, severing all of these water <br />lifelines simultaneously. This damage would require significant re -construction projects to restore the flow of <br />water, which would likely take months to complete, even with expedited, emergency repair efforts. <br />There is an estimated 6-month supply of water for southern California stored on this side of the San Andreas Fault. <br />However, an earthquake of this size would likely cause damage to local water storage and distribution <br />infrastructure as well, resulting in substantial losses to this locally stored water supply. Post -earthquake <br />firefighting efforts would also consume large quantities of local water supply. These combined effects could <br />quickly consume the available water, potentially causing widespread water shortages and rationing throughout <br />southern California. <br />107 <br />