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Mitigation Best Practices Table 21-4. Alternatives to Mitigate the Flood Hazard Personal-Scale Corporate-Scale Government-Scale  Manipulate the hazard:  Clear storm drains and culverts  Use low-impact development techniques  Reduce exposure:  Locate outside of hazard area  Elevate utilities above base flood elevation  Use low-impact development techniques  Reduce vulnerability:  Raise structures above base flood elevation  Elevate items within house above base flood elevation  Build new homes above base flood elevation  Flood-proof structures  Build local capacity:  Buy flood insurance  Develop household plan, such as retrofit savings, communication with outside, 72-hour self- sufficiency during and after an event  Manipulate the hazard:  Clear storm drains and culverts  Use low-impact development techniques  Reduce exposure:  Locate critical facilities or functions outside hazard area  Use low-impact development techniques  Reduce vulnerability:  Build redundancy for critical functions or retrofit critical buildings  Provide flood- proofing when new critical facilities must be located in floodplains  Build local capacity:  Keep cash reserves for reconstruction  Support and implement hazard disclosure for sale of property in risk zones.  Solicit cost- sharing through partnerships with others on projects with multiple benefits.  Manipulate the hazard:  Facilitate managed retreat from, or  Maintain drainage system upgrade of, the most at-risk areas  Institute low-impact development  Require accounting of sea level rise in techniques on property all applications for new development in  Dredging, levee construction, and shoreline areas providing regional retention areas  Implement Assembly Bill 162 (2007)  Structural flood control, levees, requiring flood hazard information in channelization, or revetments. local general plans  Stormwater management regulations  Build local capacity: and master planning  Produce better hazard maps  Acquire vacant land or promote open  Provide technical information and space uses in developing watersheds guidance to control increases in runoff  Enact tools to help manage  Reduce exposure: development in hazard areas (stronger  Locate or relocate critical facilities controls, tax incentives, and outside of hazard area information)  Acquire or relocate identified repetitive  Incorporate retrofitting or replacement loss properties of critical system elements in capital  Promote open space uses in identified improvement plan high hazard areas via techniques such  Develop strategy to take advantage of as: planned unit developments, post-disaster opportunities easements, setbacks, greenways,  Warehouse critical infrastructure sensitive area tracks. components  Adopt land development criteria such  Develop and adopt a continuity of as planned unit developments, density operations plan transfers, clustering  Consider participation in the  Institute low impact development Community Rating System techniques on property  Maintain and collect data to define  Acquire vacant land or promote open risks and vulnerability space uses in developing watersheds  Train emergency responders to control increases in runoff  Create an elevation inventory of  Preserve undeveloped and vulnerable structures in the floodplain shoreline  Develop and implement a public  Restore existing flood control and information strategy riparian corridors  Charge a hazard mitigation fee  Reduce vulnerability:  Integrate floodplain management  Harden infrastructure, bridge policies into other planning replacement program mechanisms within the planning area.  Provide redundancy for critical  Consider the probable impacts of functions and infrastructure climate change on the risk associated  Adopt regulatory standards such as with the flood hazard freeboard standards, cumulative  Consider the residual risk associated substantial improvement or damage, with structural flood control in future lower substantial damage threshold; land use decisions compensatory storage, non-  Enforce National Flood Insurance conversion deed restrictions. Program requirements  Stormwater management regulations  Adopt a Stormwater Management and master planning. Master Plan  Adopt “no-adverse impact” floodplain  Develop an adaptive management management policies that strive to not plan to address the long-term impacts increase the flood risk on downstream of sea level rise communities 21-5