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THE CITY OF <br /> PLEASANTONe <br /> Risk Assessment <br /> Urban Land Exposure <br /> The City of Pleasanton examined the hazard exposure of the City's urban land based on <br /> information in ABAG's website at http://quake.abag.ca.gov/mitigation/pickdbh2.html. The <br /> "2005 Existing Land Use with 2009 Mapping" file was used for this evaluation (in the existing <br /> plan, the file used was "Existing Land Use in 2000"). <br /> In general, the hazard exposure of the City of Pleasanton is increasing over time as the amount of <br /> urban land increases (In the last 5 years, 994 acres of land has become urban). <br /> City of Pleasanton actually reduced the acres of urban land in the 100 year flood zone over the <br /> last 5 years due to changes in the new FEMA flood maps. The following table describes the <br /> exposure of urban land within the City of Pleasanton to the various hazards. <br /> Exposure (acres of urban land) <br /> Hazard 2005 2010 Change <br /> Total Acres of Urban Land 10,076 11,070 994 <br /> Earthquake Faulting (within CGS zone) 386 474 88 <br /> Earthquake Shaking (within highest two shaking 8,547 8,914 367 <br /> categories) <br /> Earthquake-Induced Landslides (within CGS 36 857 821 <br /> study zone)3 <br /> Liquefaction (within moderate, high, or very 6,533 7,127 594 <br /> high liquefaction susceptibility <br /> Flooding (within 100 year floodplain)4 720 342 (378) <br /> Flooding (within 500 year floodplain) 2,261 2,074 (187) <br /> Landslides (within areas of existing landslides) 850 1,164 314 <br /> Wildfire(subject to high, very high, or extreme 903 1,159 256 <br /> wildfire threat)5 <br /> Wildland-Urban Interface Fire Threat 6,157 7,110 953 <br /> Dam Inundation (within inundation zone) 6,294 6,164 (130) <br /> Tsunamis (within inundation area) not applicable <br /> Drought 10,076 11,070 994 <br /> 3 The California Geological Survey continues to map Alameda County and added the Livermore-Altamont area in <br /> late 2009. Though some areas of the County have not yet been completely mapped, the densely populated areas in <br /> Alameda County are mostly done. <br /> 4 Decrease due to better mapping. <br /> 5 Change due to better mapping. <br /> 2010 Local Hazard Mitigation Plan Annex 8 September 1, 2011 <br /> City of Pleasanton <br />