Title
Northwest Wastewater Master Plan - Engineering Services Amendment - WS85500455 & WS90500307 (Ordinance S-49120)
Description
Request to authorize the City Manager, or his designee, to execute an amendment to Agreement 153381 with Wilson Engineers, LLC to provide additional design and construction administration and inspection services for the Northwest Wastewater Master Plan 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. The additional fee for services included in this amendment will not exceed $4,662,769.51.
Report
Summary
The purpose of this project is to study the project area to determine the water and wastewater infrastructure needed to plan for potential growth. Wilson Engineers, LLC (Wilson) will work with the City to evaluate and plan the long-term location and size of the infrastructure.
This amendment is necessary to add design and construction administration services for Package 4 of the Northwest Wastewater Master Plan project. This amendment will provide additional funds to the agreement.
Wilson's additional services include, but are not limited to: design and construction administration and inspection services for two 24-inch force mains and a 36-inch gravity sewer along the proposed 51st Avenue alignment from Lift Station 77 to the existing 36-inch gravity sewer at 47th Avenue and Pinnacle Peak Road.
Contract Term
The amendment will extend the term of the contract by one year, to on or about Feb. 21, 2026. Work scope identified and incorporated into the agreement prior to the end of the term may be agreed to by the parties. 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 $10,000,000, including all subconsultant and reimbursable costs.
- This amendment will increase the agreement by an additional $5,000,000, for a new total amount not to exceed $15,000,000, including all subconsultant and reimbursable costs.
Funding for this amendment is available in the Water Services Department's Capital Improvement Program budget. The Budget and Research Department will separately review and approve funding availability prior to the execution of any amendments. Payments may be made up to agreement limits for all rendered agreement services, which may extend past the agreement termination.
Concurrence/Previous Council Action
The City Council approved:
- Engineering Services Agreement 153381 (Ordinance S-47069) on Nov. 18, 2020.
Location
North of the Central Arizona Project, south of Carefree Highway, west of I-17, and east of the City's west limits.
Council District: 1
Department
Responsible Department
This item is submitted by Deputy City Managers Karen Peters and Mario Paniagua, the Water Services Department, and the City Engineer.