Title
Zone 3D and 4A Improvements Program Water Treatment Plant Booster Pump Stations - Engineering Services Amendment 1 - WS85100047, WS85110008, WS85100050, WS85100052 and WS85110006 (Ordinance S-49500)
Description
Request to authorize the City Manager, or his designee, to execute an amendment to Agreement 148954 with Wilson Engineers, LLC, to provide additional Construction Administration and Inspection Services for the Zone 3D and 4A Improvements Program Water Treatment Plant Booster Pump Stations project. Further request to authorize execution of amendments to the agreement, as necessary within the Council-approved expenditure authority as provided below, and for the City Controller to disburse all funds related to this item.
Report
Summary
The purpose of this project is to replace the existing Finished Water Pump Station (FWPS) at the Deer Valley Water Treatment Plant (DVWTP) to provide resiliency for the water system and increase the plant's pumping capacity to supplement water in the northern portions of Phoenix's water service area. The City of Phoenix Water Services Department completed a study that identified infrastructure improvements to move water in the distribution system as needed in the event there are restrictions placed on Colorado River water delivered through the Central Arizona Project (CAP). The City of Phoenix treats CAP water at the Union Hills and Lake Pleasant WTPs, which supply water to north Phoenix. Following completion of the project, the new pump station at the DVWTP will be able to augment the water supply in areas that have typically received water from the City's CAP plants. In order to replace the FWPS, it will be necessary to move the existing chemical storage and feed facilities at the FWPS. The first phase of the project will include relocation and demolition of the chemical facilities, and the second phase will include construction of the new FWPS.
This amendment is necessary because of the need to reprogram the timing of the construction of the project due to cost increases and associated budget impacts. This amendment will add more time to the agreement for completion of the project.
Contract Term
The term of the agreement amendment is three years from the issuance of the Notice to Proceed. Work scope identified and incorporated into the agreement prior to the end of the term may be agreed to by the parties, and work may extend past the termination of the agreement. No additional changes may be executed after the end of the term.
Financial Impact
The initial agreement for Engineering Services was approved for an amount not to exceed $11.59 million, including all sub-consultant and reimbursable costs.
Concurrence/Previous Council Action
The City Council approved:
- Engineering Services Agreement 148954 (Ordinance S-45172) on Dec. 5, 2018.
Location
31st Avenue and Dunlap Avenue
Council District: 1
Department
Responsible Department
This item is submitted by Deputy City Managers Ginger Spencer and Alan Stephenson, the Water Services Department, and the City Engineer.