Project Details

Rainbow Valley Floodplain/Floodway Delineation Study (FDS)

Public Meetings

Currently there are no public meetings scheduled for this project.

Past Public Meetings

• 11/14/2012
Project Contact: Catherine Regester
Region: W
District: 5 - Steve Gallardo

The Flood Control District of Maricopa County (District) is conducting a detailed Floodplain/Floodway Delineation Study along several washes in the Rainbow Valley area.

The study will use detailed topographic mapping and technical analyses to re-evaluate the extent of floodprone areas along the study washes. The results will be a re-delineation of the floodplain boundaries, and, for some washes, an upstream extension of the floodplain and/or the addition of a floodway. This detailed study will replace the results of portions of a previous delineation study which used approximate study methods.


The study has completed and the Federal Insurance Rate Maps have been updated effective February 2014 to reflect the study results.

Available Documents

Document Name Type Size
0. Project Notification PDF 1.48 MB
1a. November 2012 Public Meeting Announcement PDF 1.13 MB
1b. Overall Project Area Map PDF 513 KB
1c. Study Area 1 North Map PDF 540 KB
1d. Study Area 1 South Map PDF 624 KB
1e. Study Area 2 Map PDF 608 KB
1f. Study Area 3 North Map PDF 673 KB
1g. Study Area 3 South Map PDF 659 KB
1h. Study Area 4 Map PDF 642 KB

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