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F-4. IGA WITH U.S. DEPARTMENT OF AGRICULTURE NATURAL RESOURCES CONSERVATION SERVICE FOR POWERLINE FLOOD RETARDING STRUCTURE DECOMMISSIONING Approve Intergovernmental Agreement (IGA) FCD 2014A008 for the Powerline Flood Retarding Structure (FRS) Decommissioning with Channel Replacement Project (Project) between the U.S. Department of Agriculture Natural Resources Conservation Service (NRCS) and the Flood Control District of Maricopa County (District). This IGA establishes a cost share for the Project and establishes responsibilities with respect to project design, right-of-way acquisition, construction, construction management, and operations and maintenance. The cost share will be District $10,234,500 (35%) and NRCS $19,007,000 (65%). Project costs that NRCS does not cost share in will add an additional estimated $1,521,000 to the District’s Project cost for a Total Project Cost of $30,762,500. The IGA shall become effective the date it is fully executed by all parties to this IGA and shall expire 5 years after the effective date. Powerline FRS is one of three earthen flood retarding structures (Vineyard Road FRS and Rittenhouse FRS are the other two) located in northwestern Pinal County, east of the Central Arizona Project (CAP) canal and south of Baseline Road. The Powerline, Vineyard Road, and Rittenhouse FRSs Rehabilitation or Replacement Project was a District sponsored planning study which analyzed alternatives and selected a preferred alternative that would correct the dam deficiencies, maintain the flood control benefits to downstream properties, and comply with NRCS and state dam safety requirements. The selected alternative for Powerline FRS involves replacing Powerline FRS with a channel system that discharges into the Vineyard Road FRS flood pool. This Project has been selected by NRCS to be fully cost share funded from planning through construction. Per NRCS funding authorization requirements the Project must be constructed by September 30, 2018. Currently the Project is in the design phase. This IGA obligates NRCS funds for the project. In addition, this IGA requires that FCDMC reimburse NRCS for all assistance for this project. Terms of reimbursement will be established by a separate agreement. This item impacts Supervisorial Districts 1 and 2. (C-69-15-002-3-00)