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Any improvements to land, including the construction of a building, adding fill or grading, and installing walls or fencing, can adversely affect the natural flow of water in a floodplain or flood hazard area.
If a resident of Maricopa County wishes to perform construction or other improvements to property located within a 100-year flood hazard area, local regulations require a Floodplain Use Permit. If the property is not in a hazard area yet still in a floodplain, a Floodplain Use Permit is also necessary. The Flood Control District enforces the County's floodplain regulations, which regulate the construction of buildings and other improvements within designated floodplains to alleviate the upstream or downstream impacts. Floodplains are also protected for their wildlife and natural habitat areas.
Depending on the community or area of the County where the property is located, three different permitting scenarios exist and each is detailed on the Permitting page of this site.
When required, the Flood Control District reviews each permit application to ensure it complies with the County floodplain regulations and to determine if the District has any flood-related concerns. For more information, please go to the Floodplain Management section of this Web site.
The documents linked from this page are PDFs (Portable Document Files) and they require the free Acrobat Reader version 5.0 or higher to view. If you do not already have Acrobat, click on the following 'get Acrobat' button:
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