Title
Scenario 3B Transmission Main Rehabilitation - Engineering Services Amendment - WS85507008 (Ordinance S-49651)
Description
Request to authorize the City Manager, or his designee, to execute an amendment to Agreement 151557 with Wilson Engineers, LLC to provide additional Engineering Services for the Scenario 3B Transmission Main Rehabilitation 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 $1.5 million.
Report
Summary
The purpose of this project is to provide engineering services to rehabilitate approximately 3.2 miles of 48-inch diameter pre-stressed concrete cylinder pipe transmission main utilizing steel slip-line rehabilitation.
This amendment is necessary to complete the second phase of design for the project. The first phase of the project completed segments 2 and 3 with a total linear footage of 6,300 linear feet. Construction was completed in Dec. 2021. The second phase of the project will design segments 1 and 4 with an approximate linear footage of 10,500 feet. This amendment will provide additional funds and time to the agreement.
Wilson Engineers, LLC’s additional services include, but are not limited to: prepare a transmission main rehabilitation analysis, pipeline rehabilitation design, a complete set of construction documents, and construction administration and inspection services.
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 $3 million, including all subconsultant and reimbursable costs.
- This amendment will increase the agreement by an additional $1.5 million, for a new total amount not to exceed $4.5 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 151557 (Ordinance S-46313) on Jan. 29, 2020.
Location
Orangewood Avenue and 20th Street, traversing under SR-51 to Dreamy Draw Drive and north to south of the Phoenix Mountains Preserve.
Council District: 6
Department
Responsible Department
This item is submitted by Deputy City Managers Ginger Spencer and Alan Stephenson, the Water Services Department and the City Engineer.