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<br /> <br />2021 Multijurisdictional Local Hazard Mitigation Plan <br /> <br /> Recognizes the natural and beneficial functions of the County’s natural areas <br /> Considers impacts and benefits to community populations, especially those with increased vulnerability <br />The project used sea level rise inundation data from the Our Coast, Our Future tool developed by the U.S. <br />Geological Survey (USGS) and Point Blue, which provided the best available sea level rise data for the County at <br />the time of the report. Three scenarios indicate the projected extent of flooding should the project area experience <br />a 1 percent annual chance storm with or without sea level rise: <br /> The baseline scenario shows flooding with a 1 percent annual chance storm. <br /> The mid-level scenario shows flooding with a 1 percent chance annual storm and 3.3 feet of sea level rise. <br /> The high-end scenario shows flooding with a 1 percent chance annual storm and 6.6 feet of sea level rise. <br />This report identifies what is vulnerable to sea level rise among built and natural assets, explores public health and <br />risks from cascading impacts, and discusses what these factors mean for policy and planning purposes. Its <br />findings highlight that many of the assets have cross-cutting vulnerabilities (i.e., multiple, and indirect sources of <br />vulnerability) and may have more than one point of exposure to sea level rise (County of San Mateo, 2018). <br /> <br />Our Coast, Our Future <br />Our Coast, Our Future (OCOF) is a collaborative project focused on providing coastal California resource <br />managers and land use planners locally relevant, online maps and tools to help understand, visualize, and <br />anticipate vulnerabilities to sea level rise and storms. The OCOF incorporates factors such as water levels, wave <br />heights, flooding, and erosion to assess vulnerabilities to sea level rise and storms in the San Francisco Bay and <br />on the outer coast from Half Moon Bay to Bodega Bay. The following are available on the OCOF website: <br /> Seamless digital elevation model at 2-meter horizontal resolution for the San Francisco Bay Area <br /> 40 sea level rise and storm scenarios, plus a King Tide scenario for San Francisco Bay, using the USGS <br />Coastal Storm Modeling System <br /> FAQ and video tutorials, including general project information, geographic coverage, data used, model <br />development, and how to use the flood map <br /> Interactive maps of flood extent, depth, and duration, wave heights, and current velocity, as well as the <br />option to compare scenarios and view georeferenced King Tide photos <br /> Online and downloadable data access tailored to end users’ information needs. <br /> <br />Adapting to Rising Tides <br />The Adapting to Rising Tides (ART) program was established in 2010 to identify how current and future flooding <br />along the Alameda County shoreline will affect communities, infrastructure, ecosystems, and economy. It was a <br />project of the San Francisco Bay Conservation and Development Commission, NOAA’s Office for Coastal <br />Management, local, regional, state and federal agencies and organizations, and non-profit and private associations. <br /> <br />Since then, the ART program has continued with cross-jurisdictional projects that build local and regional <br />capacity in the San Francisco Bay Area to plan for and implement adaptation responses. The program tests and <br />refines adaptation planning methods to integrate sustainability and decision-making from start to finish and foster <br />collaborations that lead to action on adaptation. Each ART program project provides data, maps and analysis <br />about the assets, asset categories and sectors evaluated. <br /> <br /> <br />13-2