Yavapai County Flood Control District

New Preliminary Flood Maps Provide Updated Understanding of County Flood Risks


Why Remap?

The Yavapai County Flood Control District (the District) and the Federal Emergency Management Agency (FEMA) are processing a new Letter of Map Revision (LOMR) of a flood hazard area within Yavapai County. These more detailed maps will help property owners better understand their flood risk and help them make more informed decisions on how to protect their family and property during a runoff event.



The flood hazard areas in Yavapai County were originally mapped in the late 1970s. Over time, water courses have changed due to large rainfall events, erosion and development. In addition, development over the last several decades didn't always include managing the increased runoff into our watersheds. In this case, better technology has allowed for more accurate topography to map against the floodplain models.

In comparing the Base Flood Elevation to the newer topography in West Chino Valley, it was clear the Base Flood Elevations were not lining up with the topography, and were off by as much as five feet.

What Areas Are Being Updated?

The update includes a portion of Chino Valley Stream, all of Chino Valley Tributary 1 and Chino Valley Stream Tributary 2.

The study has been reviewed by FEMA and minor changes are required. Once approved by FEMA, property owners will be notified of any approved changes on the maps. If you would like more information, call Lynn Whitman at (928) 771-3197 or email at web.flood.control@yavapaiaz.gov.

To compare the existing and proposed floodplain boundaries, please visit, West Chino Valley Floodplain Delineation Study (arcgis.com)

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