Title
Lift Station 66 Refurbishment - Engineering Services Amendment - WS90400084 (Ordinance S-49445)
Description
Request to authorize the City Manager, or his designee, to execute an amendment to Agreement 151303 with Garver, LLC, to provide additional engineering services for the Lift Station 66 Refurbishment 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 $600,000.
Report
Summary
The purpose of this project is to refurbish Lift Station (LS) 66. The lift station was initially constructed and operated to provide direct flows to Cave Creek Water Reclamation Plant (CCWRP). When the CCWRP was shut down in 2009, LS 66 flows were bypassed to the gravity sewer in North Valley Parkway with the exception of flows from the adjacent City of Phoenix Solid Waste Transfer Facility.
In order to make LS 66 operational, upgrades and improvements are recommended for the mechanical, structural, electrical, instrumentation and control system equipment. The proposed refurbishment project includes replacement or upgrades of pumps, motors, slide gates, piping, valves, bio filter, variable frequency drive, programmable logic control, control panel, instrumentation, and coating refurbishment.
This amendment is necessary as it was identified during the design phase that a new industrial discharger was needed in the sewer shed, resulting in the need to rerun the hydraulic evaluation and significantly update the design criteria and recommendations. The project also assumed the existing odor control would be retrofit. After evaluating alternatives to retrofit, the design was paused while alternatives for the odor control were evaluated and the identified alternative to be designed based on the selected option. Due to the changes in the design and construction needs the estimated fee for construction administration and inspection services has increased. This amendment will provide additional funding and time to the current agreement.
Garver, LLC's additional services include, but are not limited to assisting the City during the procurement phase by providing responses to questions from bidders, oversight of the project construction activities, inspecting the site through various stages of construction, reviewing contractor work submittals, performing field inspections where required for completed repairs, finalizing contract documents including electronic submittals, as-builts, and a water asset management engineering packet.
Contract Term
The term of this agreement amendment is one year from 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 $700,000, including all subconsultant and reimbursable costs.
- This amendment will increase the agreement by an additional $600,000, for a new total amount not to exceed $1.3 million, 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 151303 (Ordinance S-46201) on Dec. 4, 2019.
Location
N. Black Canyon Highway
Council District: 2
Department
Responsible Department
This item is submitted by Deputy City Managers Ginger Spencer and Alan Stephenson, the Water Services Department and the City Engineer.