Project Details

Palo Verde Watershed Detailed Floodplain Delineation Study

Public Meetings

Currently there are no public meetings scheduled for this project.

Past Public Meetings

• 7/14/2011
• 7/12/2011
Project Contact: Jeff Shelton
Region: NW
District: 4 - Clint L. Hickman 5 - Steve Gallardo

The study area is located in an unincorporated area of western Maricopa County. The general study area is bounded on the north by Sugarloaf and Belmont Mountains, on the south by Centennial Wash, on the east by 355th Avenue, and on the west by Burnt Mountain and Saddle Mountain. This project will delineate from 100 to 150 linear miles of detailed floodplains in the Palo Verde watershed. Some of the detailed floodplains will be new; some will replace Zone A floodplains.


The Technical Data Notebooks (TDN) for this project are complete and have been sent to FEMA for review. For this project there were two TDNs produced. One reports the results of the hydrology done for the project area. The other reports the hydraulics and mapping work that was done to delineate the 1-Percent Annual or 100-Year Floodplain. These TDNs are a summary of the work we did to map or re-map the floodplains in this project area utilizing FEMA guidance and specifications. A FEMA contractor has reviewed and approved the TDNs for technical and regulatory completeness. There can be a delay before FEMA incorporates the study into the Flood Insurance Rate Maps (FIRM). Tentatively, this study will be on the FIRM in the fall of 2015.

Available Documents

Document Name Type Size
Public Open House Announcement PDF 1.54 MB

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