APPENDIX C: MITIGATION ALTERNATIVES
Action #
Mitigation Action
Reason for Pursuing / Not Pursuing
Funding
Program to install emergency electrical generators at all public utility facilities. Current focus on redundant generators at critical facilities, second fuel truck and completion of 100% generator coverage in Garner area.
This all hazards project will ensure that facilities can remain functional during times when power is lost due to various disasters.
Operating Budget
ES-6
C.2.5 Structural Projects Four general types of flood control projects are reviewed here: levees, reservoirs, diversions, and dredging. These projects have three advantages not provided by other mitigation measures: • They can stop most flooding, protecting streets and landscaping in addition to buildings. • Many projects can be built without disrupting citizens' homes and businesses. • They are constructed and maintained by a government agency, a more dependable long-term management arrangement than depending on many individual private property owners. However, as shown below, structural measures also have shortcomings. The appropriateness of using flood control depends on individual project area circumstances. • Advantages o They may provide the greatest amount of protection for land area used o Because of land limitations, they may be the only practical solution in some circumstances o They can incorporate other benefits into structural project design, such as water supply and recreational uses o Regional detention may be more cost-efficient and effective than requiring numerous small detention basins • Disadvantages o They can disturb the land and disrupt the natural water flows, often destroying wildlife habitat o They require regular maintenance o They are built to a certain flood protection level that can be exceeded by larger floods o They can create a false sense of security o They promote more intensive land use and development in the floodplain Levees and Floodwalls Probably the best-known flood control measure is a barrier of earth (levee) or concrete (floodwall) erected between the watercourse and the property to be protected. Levees and floodwalls confine water to the stream channel by raising its banks. They must be well designed to account for large floods, underground seepage, pumping of internal drainage, and erosion and scour.
Wake County Multi-Jurisdictional Hazard Mitigation Plan 2019
C.17
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