|Currently there are no public meetings scheduled for this project.|
|Project Contact:||Felicia Terry|
|District:||1 - Denny Barney|
|Phase:||Design & Engineering|
The Powerline, Vineyard Road, and Rittenhouse (PVR) Flood Retarding Structures (FRS) 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. Per its agreements with the Soil Conservation Service (now Natural Resources Conservation Service, or NRCS), the District operates and maintains the structures. The FRS protects approximately 72 square miles of residential, commercial, and agricultural land in Maricopa and Pinal counties from being flooded, and protects structures such as the CAP canal, Phoenix-Mesa Gateway Airport, and the Loop 202 Santan Freeway.
The Arizona Department of Water Resources reclassified the PVR FRS as "high hazard potential structures” meaning they protect substantial amounts of infrastructure and a large population. In July 2002, the District prepared a Final Failure Mode Analysis Report, Structures Assessment Program Phase I (FFMA) that identified defects in the structures due to the age of the structures, proximity to earth fissures, land subsidence of the area, and cracking caused by drying shrinkage. The FFMA recommended rehabilitation of the structures which could include structural improvements to the dam or replacement of the dams with channels, basins or other flood control facilities.
A planning study was started in 2009 to evaluate alternatives for the rehabilitation of the structures. During the planning study, the alternative selected was to replace the Powerline FRS with a channel that flows into the Vineyard Road FRS floodpool, convert Rittenhouse FRS to a levee that discharges into Vineyard Road FRS floodpool, and then to raise and rehabilitate Vineyard Road FRS. However during the design phase, it was determined that the Rittenhouse Levee would not function properly so Rittenhouse FRS will remain a dam. Therefore, the selected design project is for the Powerline FRS to be replaced with a channel and the Vineyard Road and Rittenhouse FRSs raised and rehabilitated.
The Powerline Channel and the Vineyard Road FRS raise and rehabilitation is currently being designed. The Powerline Channel is being designed in a separate project. The Vineyard Road FRS Rehabilitation Project is being designed in 3 phases. The 1st phase has been designed and constructed, which involved excavating and processing the soil material needed for constructing the embankment. A Construction Manager at Risk (CMAR) has been contracted to help with the design and has constructed Phase 1. Phase 2 involves the embankment raise and Phase 3 involves the reconstructing the emergency spillways and principal outlet. Phase 2 and 3 are being designed concurrently with final plans being completed the spring of 2018. Rittenhouse FRS Rehabilitation is currently not being designed.
The 5.5 mile long Vineyard Road FRS construction will involve an upstream filter, raising the embankment approximately 12 feet, new foundation, reconstruction of 2 earthen emergency spillways with concrete structures, and a new principal outlet.
Contact the Project Manager for additional information, Felicia Terry, P.E., CFM, 602-506-8111 or firstname.lastname@example.org
|2015-01 Powerline FRS Environmental Assessment - Final||4.76 MB|
|2015-01 Project Fact Sheet||3.55 MB|
|2015-01 Vineyard and Rittenhouse Environmental Assessment||5.74 MB|
|Exhibit - Existing Conditions at Each FRS||22.2 MB|
|Exhibit - Overall Project Area Map||2.28 MB|
|Exhibit - Regional Context Map||12 MB|
|Exhibit - Sample Alternative 1||1.87 MB|
|Exhibit - Sample Alternative 2||1.85 MB|
|Exhibit - Sample Alternative 3||1.84 MB|
|Exhibit - Site Analysis||11.7 MB|
|Project Comment Sheet||241 KB|
|Project Fact Sheet||3.3 MB|
|Project Site Map||2.06 MB|
|Public Meeting 1 Presentation - November 4, 2010||6.2 MB|
|Public Meeting 2 Presentation - February 1, 2011||1.6 MB|
|Public Meeting 2 Question & Answer Session||228 KB|
|Public Meeting 3 Presentation - February 12, 2013||6 MB|
|Stakeholder Meeting 1 Minutes - August 26, 2010||61.2 KB|
|Stakeholder Meeting 1 Presentation - August 26, 2010||2.46 MB|
|Stakeholder Meeting 2 Minutes - September 13, 2010||478 KB|
|Stakeholder Meeting 2 Presentation - September 13, 2010||11.5 MB|