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<br /> Hazard Mitigation Plan | 2022 <br />Flood Hazards <br />- 73 - <br /> <br />According to the Santa Ana River Vision Plan (2006), the Santa Ana River experienced flooding <br />most recently in 1969, when flooding along the watershed caused damage to nearby tributaries. <br />After this incident, the Santa Ana River was considered the greatest flood threat west of the <br />Mississippi, which prompted the installation of the concrete lining in the river channel. <br /> <br />Table: Santa Ana River Flood History <br />(Source: History of the Santa Ana River, Santa Ana Website) <br />Date Description <br />1969 Flooding along the Watershed, damaged nearby tributaries <br />1938 Flash flood, 19 deaths, 2,000 homeless, 68,400 acres flooded <br /> <br />Photo: January 12, 2017 Flooding at Bristol and 17th Street <br />(Source: 2018 Storm Drain Master Plan) <br /> <br /> <br />Q&A | ELEMENT B: HAZARD IDENTIFICATION AND RISK ASSESSMENT | B1a. <br />Q: Does the plan include a general description of all natural hazards that can affect each jurisdiction? <br />(Requirement §201.6(c)(2)(i)) <br />A: See Local Conditions below. <br />Q&A | ELEMENT B: HAZARD IDENTIFICATION AND RISK ASSESSMENT | B3b. <br />Q: Is there a description of each identified hazard’s overall vulnerability (structures, systems, populations, <br />or other community assets defined by the community that are identified as being susceptible to damage <br />and loss from hazard events) for each jurisdiction? (Requirement §201.6(c)(2)(ii)) <br />A: See Local Conditions below. <br /> <br />Local Conditions <br />According to the Orange County General Plan (2013), Orange County’s geography and climate <br />increase its susceptibility to flooding. Commonly, where a broad alluvial plain exists, such as the <br />one created by the Santa Ana River, there has been and is a continual expansion of urban <br />development.