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Project Name: Saddleback FRS Modifications


Project Manager: Stephen Brown
Contact by phone at (602) 506-5426 or by email

Project is in Supervisor District:

  • District 1: False
  • District 2: False
  • District 3: False
  • District 4: True
  • District 5: True

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Project Type: Study

Project Description:

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

The Saddleback FRS, located south of Interstate 10, is a compact earth-fill dam that 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 US Soil Conservation Service (now the Natural Resources Conservation Service) was the federal sponsor for construction. The District and the US Soil Conservation Service were cost-share partners on the initial construction of this structure.

Last Updated: 2/24/2021 11:34:26 AM

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