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2014 -2021 SANTA ANA HOUSING ELEMENT AND PUBLIC SAFETY ELEMENT UPDATES CITY OF SANTA ANA 3. Environmental Analysis j) Inundation by seiche, tsunami, or mudflow? No Impact. A seiche is a surface wave created when a body of water is shaken, usually by earthquake activity. Seiches are of concern relative to water storage facilities because inundation from a seiche can occur if the wave overflows a containment wall, such as the wall of a reservoir, water storage tank, dam or other artificial body of water. While the City of Santa Ana does have aboveground water reservoirs, the potential for one of them failing is unlikely. However, dam failure at Prado Dam or the Irvine Lake /Villa Park dam and reservoir system could inundate the project area. A tsunami is a great sea wave produced by a submarine earthquake or volcanic eruption. Due to the City's distance from the coastline (approximately six miles), a tsunami does not pose a hazard to the site. Muciflows are landslide events in which a mass of saturated soil flows downhill as a very thick liquid. Santa Ana is generally flat and is not located along steep slopes or hillsides. Although it is unlikely that anticipated development would be impacted by seiche, tsunami or mudflows, any future development would be evaluated on an individual basis. Therefore, potential site inundation as a result of seiche, tsunami, or mudflow due to the adoption of the Housing Element would have no impact and no mitigation measures are necessary. 3.10 LAND USE AND PLANNING a) Physically divide an established community? No Impact. The Housing Element identifies multiple residential opportunity areas within Santa Ana, The Harbor Corridor Specific Plan involves rezoning 305 acres to allow for mixed - use /residential development, with approximately 10 acres set aside exclusively for residential development. This specific plan is anticipated to be adopted in early 2014. Metro East and Transit Zoning Code (TZC) areas are already zoned for residential development and would not require rezoning. Transit corridors along First Street and Fifth Street would, however, require rezoning to allow for new residential development. Nevertheless, the residential opportunity areas along First and Fifth Street are additional and are not required to meet the City's RHNA for the 2014 -2021 timeframe. These areas would only supplement the City with more opportunity areas, exceeding the RHNA housing requirements. Furthermore, the Housing Element does not propose any roadway extensions or other development features through areas that would alter the City's circulation network. Therefore, residential development in accordance with the Housing Element would not physically divide an established community and no impacts would occur. b) Conflict with any applicable land use plan, policy, or regulation of an agency with jurisdiction over the project (including, but not limited to the general plan, specific plan, local coastal program, or zoning ordinance) adopted for the purpose of avoiding or mitigating an environmental effect? Less Than Significant Impact. The project is an update to the Housing Element of the City's General Plan, and would become the new Housing Element upon approval by the City Council. The City of Santa Ana is not within the coastal zone, and so is not subject to a local coastal program. The City has set forth a strategy for addressing its housing needs by already built or approved new housing projects, housing preservation, and identifying opportunity areas for future residential and mixed uses primarily within the Page 58 • The Planning Canter ) DC&E, Decerreber 2O13 75A -80