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90 <br /> <br /> <br />5.5 DAM FAILURE <br />According to CAL OES inundation information and maps, most of San Leandro would be <br />flooded in the event of complete dam failure at the Lake Chabot or Upper San Leandro <br />Reservoirs. As figure 5-16 and 5-17 indicates flood waters from a dam failure would reach <br />the western portion of the city in under 25 minutes. Such a flood could produce <br />catastrophic damage and casualties in the city. The dams at both reservoirs have been <br />seismically strengthened during the last 30 years, making the risk of failure extremely <br />low. EBMUD is currently completing a seismic reinforcement to the dam wall and will <br />continue to reinforce as needed. San Leandro does not have any historical events <br />associated with the failure or partial failure of Chabot Dam. <br />Figure 5-14 Map of Chabot Dam <br /> <br />129