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authority, but shall meet the goal of accommodating an increase in sea level of 3 feet by <br />2100. Methods for achieving long-term flood hazard reduction include, but are not limited <br />to, any combination of the following approaches and shall be approved by the City <br />Engineer: <br />A. Elevation of Lowest Floor. The lowest floor of structures shall be built at or above the <br />existing 100 -year base flood elevation plus 3 feet of sea level rise. Elevation change <br />from any future development to the waterfront should be accommodated through <br />graded slopes and low retaining walls, as needed. This increased elevation shall not be <br />required for structures wholly within a FEMA -accredited levee or seawall system. <br />B. Setbacks. Required setbacks from waterfront areas, as described in Table 57.4 <br />(Development Standards), shall not only provide for public access and recreation but <br />provide additional buffer to accommodate sea level rise. <br />C. Managed Retreat. Projects shall provide for a phased conversion of the outboard <br />portions of any project area to tidal marsh. When the outboard edge of the fill <br />approaches the shoreline, it shall be graded at a slope of 20:1 and shall be restored to <br />tidal action with tidal marsh and native uplands vegetation on the outboard slope. <br />D. Levees and Sea Walls. Projects shall construct levees or seawalls according to FEMA <br />certification standards and the existing 100 -year base flood elevation plus three feet of <br />sea level rise. Any new portion of a levee above existing grade shall be sloped at least <br />10:1. Scour protection shall be vegetation rather than rip rap where possible. <br />Floodwalls may be used on top of a levee to provide additional protection. <br />ATTY/RESO.0026/PC RESO ZONING MIXED USED WATERFRONT DISTRICT <br />REV: 04-13-18 PR <br />Page 17 of 17 <br />