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If you want to make changes to land located within a 100-year flood hazard area, local regulations require you to obtain a Floodplain Use Permit before you build, add, grade, or install walls or fencing.
The permit requirement aims to minimize flood damage potential to your property without increasing the flood risk to your neighbors' property. Floodplains are also important wildlife and natural habitat areas that need to be protected.
Before issuing a floodplain use permit, the District undertakes a detailed review of the hydrologic conditions that affect the property and checks to make sure that any proposed improvements conform with the County's Floodplain Regulations.
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