Project Name: Powerline/Vineyard Road/Rittenhouse FRS Rehab
Project is in Supervisor District:
- District 1: True
- District 2: False
- District 3: False
- District 4: False
- District 5: False
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Project Type: Engineering/Design
Powerline, Vineyard Road and Rittenhouse (PVR) Flood Retarding Structures (FRSs) are located in northwest Pinal County (south of Apache Junction and parallel to the Central Arizona Project (CAP) canal between Baseline Road and Ocotillo Road). The primary function of these structures is to provide flood protection for the downstream benefitted area and to reduce the risk of loss of life and property due to catastrophic dam failure. The three FRSs protect approximately 72 square miles of residential, commercial, and agricultural land in Maricopa and Pinal counties from being flooded. Including the CAP canal, Phoenix-Mesa Gateway Airport, ASU Polytechnic Campus and the Loop 202 Santan Freeway.
The PVR FRSs are classified as "high hazard potential structures” which signifies that they protect substantial amounts of downstream infrastructure and a large population. In July 2002, the District prepared a Final Failure Mode Analysis (FFMA) Report, Structures Assessment Program Phase I that identified defects in the three structures due to the age, proximity to adjacent earth fissures, land subsidence of the area due to groundwater withdrawal, and cracking caused by drying shrinkage. The FFMA recommended rehabilitation of the structures which includes structural improvements to the dams or replacement of the dams with channels, basins or other flood control facilities. The District manages the three structures by agreement with the Natural Resources Conservation Service (NRCS).
The plan for the existing PVR dams is to replace Powerline FRS with Powerline Channel and to raise and rehabilitate Vineyard Road FRS and Rittenhouse FRS. The Vineyard Road Rehabilitation Project is currently at the final design phase. The construction start date is tentatively scheduled for December 15, 2023.
Last Updated: 8/16/2023 2:58:48 PM
Posted On: 4/4/2022 10:13:32 AM
Biological Evaluation Completed March 31, 2022 - EcoPlan Associates, Inc.
Phase 2 and Phase 3 Final Design
Posted On: 3/16/2022 1:47:22 PM
Phase 2 and Phase 3 100% Final Design - Stantec Consulting
There are no public meetings scheduled.
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