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for these residents’ amounts to over one million dollars a year. The City is presently working with impacted homeowners to verify the elevations of their homes, possibly enabling some residents to have their properties removed from the floodplain boundary. Additional appeals of the boundaries have been filed. The principal consequence of a property’s designation within the 100-year flood zone is that flood insurance is required for federally insured mortgage loans. Insurance also may be required by other mortgage lenders. Moreover, the City’s Floodplain Management Ordinance requires that new construction, additions and major home improvement projects are raised at least one foot above the base flood elevation — this can be a significant expense for homeowners making alterations to existing structures. While the City works with FEMA to improve the accuracy of the flood zone maps, it is also working with the ACFCWCD to increase the carrying capacity of the channels. Measures being pursued include redesign of the channels, replacing undersized culverts, and keeping the channels well-maintained and free of debris. Steps should be taken to identify additional funding sources and expedite the reconstruction of the channels. The most current flood maps have been added to the Appendix of this document as Appendix items 8.6. 5.12.3.2 Dam Failure Most of San Leandro would be flooded in the event of dam failure at the Lake Chabot or Upper San Leandro Reservoirs. Such a flood could produce catastrophic damage and casualties in the city. The dams at both reservoirs have been seismically strengthened during the last 30 years,