What Is Flood Plain Addendum?
An addendum is an agreed-upon legal addition to an already-existing agreement or regulation. It is usually a proposed change, which, when agreed upon by all parties, is added to an original arrangement, such as a flood plain management regulation.
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Flood Plain
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A flood plain is an area of land designated by the Federal Emergency Management Agency (FEMA) that is at risk of flooding, according to a University of Wisconsin Eau Claire (UWEC) website on flood plain management.
Flood Plain Management
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According to UWEC, flood plain management regulations can include land acquisition, flood proofing, establishing a Flood Insurance Rate Map (FIRM) and regulating the use of Advisory Base Flood Elevations (ABFEs) for flood-prone areas. A flood plain addendum to existing regulations may sometimes become necessary.
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Flood Plain Addendum
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A flood plain addendum is proposed because existing management regulations of a specific site appear insufficient in dealing with potential flood risk. FEMA proposed a number of flood plain addenda following Hurricane Katrina, including a proposal for levee management in Plaquemines Parish.
Recommendations
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A flood plain addendum can recommend that a higher base flood plain elevation be used for an area, and it can regulate the use of Advisory Base Flood Elevations (ABFEs) for flood-prone areas. It can also recommend changes in ABFEs in terms of new construction and for existing structures that have been substantially damaged.
Proposals
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A flood plain addendum can be proposed by FEMA or by county departments of public works and local and state governments.
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