Title
Intergovernmental Agreement Amendment for Maricopa County Cave Creek Landfill Injection Well Project (Ordinance S-44566)
Description
Request to authorize the City Manager, or his designee, to execute an amendment to Intergovernmental Agreement (IGA) 143720 between the City of Phoenix and Maricopa County to pay for construction of a perimeter wall around a well site near the Maricopa County Cave Creek Landfill per City standards, and to cooperate jointly on community involvement for the project. Further request authorization for the City Controller to disburse all funds related to this item.
Report
Summary
The existing IGA between the City and Maricopa County was signed in October 2016. The City partners with Maricopa County on efforts to clean groundwater impacted by the Cave Creek Landfill in north Phoenix with construction of an injection well near the landfill. The injection well recharges treated groundwater and creates a hydraulic barrier to prevent contaminated groundwater from entering City water supply wells. In the future, the well will be operated by the City as an Aquifer Storage and Recovery (ASR) well and will be conveyed once cleanup of landfill-impacted groundwater is fully complete. The IGA amendment includes reimbursement from the City to the County up to $185,000 for a well site perimeter wall and gate, and mutual cooperation on community involvement matters.
Contract Term
The original IGA term and the amendment will remain in effect until cleanup of the landfill-impacted groundwater is fully completed to regulatory levels acceptable to the Arizona Department of Environmental Quality, which is projected to span approximately 30 years.
Financial Impact
The cost to complete the well site perimeter wall is $185,000. Funding is available in the Water Services Department's Capital Improvement Program budget.
Concurrence/Previous Council Action
IGA 143720 was approved by the City Council on Aug. 31, 2016.
Location
The project is located near 3955 E. Carefree Highway.
Council District: 2
Department
Responsible Department
This item is submitted by Deputy City Manager Karen Peters and the Water Services Department.