Title
23rd Avenue Wastewater Treatment Plant Grit Basin Replacement - Engineering Services - WS90200059 (Ordinance S-44418)
Description
Request to authorize the City Manager, or his designee, to enter into an agreement with Wilson Engineers, LLC, to provide engineering services, including design and possible construction administration and inspection services for installation of new grit basins to remove solids from wastewater by gravitational settling in support of the 23rd Avenue Wastewater Treatment Plant (WWTP) Grit Basin Replacement project. The fee for engineering services will not exceed $3,915,000. Further request authorization to execute amendments to the contract as necessary within the Council approved expenditure authority as provided below, and for the City Controller to disburse all funds related to this item.
Additionally, request authorization for the City Manager, or his designee, to take all action deemed necessary to execute all utilities-related design and construction agreements, licenses, permits, and requests for utility services related to the development, design and construction of the project and to include disbursement of funds. Utility services include, but are not limited to: electrical, water, sewer, natural gas, telecommunication, cable television, railroads and other modes of transportation. This authorization excludes any transaction involving an interest in real property.
Report
Summary
The treatment process at the 23rd Avenue WWTP consists of preliminary, primary, secondary, and tertiary treatment. The original grit basins were constructed in 1984, and have recently been repaired. Wilson Engineers, LLC, has completed an assessment to develop a conceptual design for replacement of the grit basins at the 23rd Avenue WWTP. Based on the assessment, it has been determined that the design of the new grit removal facilities should proceed.
Wilson Engineers, LLC, will provide design services and possible construction administration services for the replacement of grit basins and supporting facilities. The design services include, but are not limited to: project management, project meetings and workshops, permitting and code compliance, performance modeling, survey, and full design services for the new grit basins, grit washer / classifier, standby power, and support facilities.
Procurement Information
Wilson Engineers, LLC, was chosen for this project using a qualifications-based selection process according to Section 34-603 of the Arizona Revised Statutes. Scoring and selection were made in conjunction with the Engineering Conceptual Design Services selection.
Contract Term
The term of this contract is expected to be 24 months. Contract work scope identified and incorporated into the contract prior to the end of the contract may be agreed to by the parties and work may extend past the termination of the contract. No additional contract work scope may be executed after the end of the contract term.
Financial Impact
Wilson Engineers, LLC's total fee for contract services will not exceed $3,915,000, including all subconsultant and reimbursable costs.
Staff will execute the initial contract for design services for a fee not-to-exceed $1,415,000, including all subconsultants and reimbursable costs. Contract amendments may be executed for construction administration and inspection services or other contract services totaling an amount not-to-exceed the remaining $2,500,000, and will be reviewed and approved separately by the Budget and Research Department.
The total amount of $3,915,000 is available in the Water Services Department's Capital Improvement Program budget. Contract payments may be made up to the contract limits for all rendered contract services, which may extend past the contract termination.
Concurrence/Previous Council Action
The City Council approved the Engineering Conceptual Design Services Contract 144853 on April 19, 2017.
Location
2470 S. 22nd Ave.
Council District: 7
Department
Responsible Department
This item is submitted by Deputy City Managers Karen Peters and Mario Paniagua, the Water Services Department, and the City Engineer.