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48. IGA WITH THE CITY OF PHOENIX FOR THE DESIGN PHASE OF THE JOINT 2007-2008 PM-10 DUST PROOFING PROJECT Approve an Intergovernmental Agreement between City of Phoenix (# 123821) and Maricopa County through the Public Works, in the not-to-exceed amount of $100,000. The purpose of this Intergovernmental Agreement is for the design phase of the joint 2007-2008 PM-10 Dust Proofing Project. This Intergovernmental Agreement is effective from Board approval until the design is complete. This Project will be funded through MCDOT Project Dust Mitigation (DMIT), Job Number T301, IGA with the City of Phoenix for Design of PM-10. The City and County are initiating a joint dust proofing project in various locations throughout the Phoenix and Maricopa County area which includes dust proofing approximately nine miles of unpaved roads and twelve miles of shoulders. Refinement of exact locations will be completed with City and County coordination and approval. The County's share of the design costs are currently estimated at $65,000, but will not exceed $100,000.The City will act as the lead agency for the Project including environmental clearances, utility clearances, right-of-way clearances, and ADOT and FHWA coordination. The City will secure and execute and award the design phase contract, plus utilize Federal Congestion Mitigation and Air Quality (CMAQ) funding to prepare the design phase on behalf of the County. (Supervisorial Districts 1 - 5) (C-91-08-004-3-00)

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86. IGA WITH THE CITY OF PHOENIX FOR THE CONSTRUCTION PHASE OF THE JOINT PM DUST PROOFING PROJECT Approve the Intergovernmental Agreement ( IGA) between Maricopa County and the City of Phoenix (No. 127252) for the joint Construction Phase of the PM Dust Proofing Project. By previous Board action (C-91-08-004-3-00) dated September 3, 2008 the County entered into an IGA with the City of Phoenix to design dust proofing of various roads and shoulders throughout the County and City. This request moves these projects from design to construction. The dust proofing is to be 2-inch Asphaltic Concrete over compacted native ground. The project is estimated to cost $1,300,000. Funds have been set aside in the Public Works (910) Transportation Capital Projects Fund (234) Dust Mitigation (DMIT) Project Number T301, IGA with Phoenix for PM-10 Design and Construction. The City is acting as the lead agency for the project, including coordination with ADOT and FHWA. The City will secure, execute and award the contract for construction of the Project. The City will notify County forces to inspect the work; and the County will notify the City of the County’s acceptance. The County’s portion of the costs will be 85.4% of the dust proofing for roadways and 100% of the dust proofing for shoulders. The costs are currently estimated at $550,000, but not-to-exceed $750,000 for the roadways and $350,000, not-to-exceed $550,000 for the shoulders. Each party will be responsible for maintenance of the portions of the project that reside within their jurisdictional boundaries. The total estimated cost for the entire unpaved roads portion of the project is $4,748,228. The County’s portion of the unpaved roads project is estimated at $4,055,000, of which approximately $3,295,107 or 81% will come from federal monies. Because Phoenix is the lead agency, the City will receive the federal funding and apply it to the project, leaving a maximum of $750,000 to be paid by the County. The unpaved shoulders portion of the project is all within Maricopa County, and the estimated cost is $1,059,983, of which approximately $554,380 or 52.3% will come from federal monies. Because Phoenix is the lead agency, the City will receive the federal funding and apply it to the project, leaving a maximum of $550,000 to be paid by the County. Supervisorial Districts: 1, 2, 3, 4, and 5 (C-91-10-081-3-00)