Project Details

Saddleback FRS Modifications

Public Meetings

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Past Public Meetings

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Project Contact: Stephen Brown
Region: W
District: 4 - Clint L. Hickman 5 - Steve Gallardo
Phase: Planning & Studies

The Saddleback Flood Retarding Structure (FRS), located just south of Interstate 10, is a compact earth-fill dam which receives floodwaters discharged from the Harquahala FRS and runoff water from a more than 22-square mile drainage area. The floodwater is conveyed to the Saddleback Diversion Channel via the principal spillway and outfalls south at the tributary of Centennial Wash. The structure is 5.1 miles in length and has a height of 21 feet, with a storage capacity of 3,620-acre feet. The U.S. Soil Conservation Service, now the Natural Resources Conservation Service (NRCS), was the federal sponsor for construction. The District and the U.S. Soil Conservation Service were cost share partners on the initial construction of this structure.

Saddleback FRS has experienced the formation of numerous erosion holes and longitudinal cracking along the entire length of centerline of the dam crest. The issue cannot be addressed by normal maintenance work and has developed into a dam safety issue which is continuing to worsen over time. The District has identified a need to rehabilitate the FRS.


This modifications project will be replaced by a rehabilitation project. The rehabilitation project is being further evaluated for feasibility. The planning phase of the project will follow.

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