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City of Santa Ana Emergency Operations Plan <br />Part I Basic Plan <br />The following maps, courtesy of NDMC-UNL, depict the progression of drought conditions 2012-2017: <br />Figure 106 California Drought Conditions 2012 through 2017 <br />U.S. Drought Monitor 11 <br />W..California Drought Conditions each January, 2013-2017 <br />http://droughtmon itOLun I.edu/ <br />Damage to Water Supply Lines — After drought, the next most likely threat to the water supply is damage to <br />water supply infrastructure. The City of Santa Ana imports about 25% of its water supply. However, Orange <br />County imports approximately 50% and southern California imports approximately 2/3 of its water supply. These <br />imports come primarily from northern California and from the Colorado River, through a network of aqueducts, <br />canals and tunnels throughout the central and southern parts of the state. These include the California Aqueduct <br />from the north, the Colorado River Aqueduct and Coachella Canal from the east, and the Los Angeles Aqueduct, <br />which brings water to the City of Los Angeles from the Owens Valley, as well as numerous reservoirs and <br />pumping stations to transport the water. The San Andreas Fault, southern California's largest and most powerful <br />earthquake fault, crosses or intersects with these water systems in 22 separate locations: <br />106 <br />