This is a service / maintenance or supply contract in Phoenix, Arizona. Contact the soliciting agency for additional information.

The City of Phoenix is seeking a qualified engineering consultant/consultant team to provide engineering services for the Sub-Regional Operating Group 91st Avenue Wastewater Treatment Plant Solids Rehabilitation Phase 2. Services may include engineering analyses, design, permitting, programming, and possible construction administration and inspection services. This project site is located at the 91st Avenue Wastewater Treatment Plant. The City intends to engage the services of an engineering consultant/consultant team to provide design and construction administration and inspection services for the rehabilitation of the facilities and equipment used to treat and process solids. This project will include the rehabilitation and replacement of equipment associated with solids digestion, including, but not limited to, fixed covers on two digesters, pumps, motors, heat exchangers, piping, valves, control instruments, control panels, and electrical equipment including panels, variable frequency drives, transformers, and motor control centers. The 91st Avenue Wastewater Treatment Plant (WWTP) is located on a 560-acre site just east of 91st Avenue, south of Broadway Road and north of Southern Avenue. The plant is owned by the Sub-Regional Operating Group (SROG) and operated by the City of Phoenix. The facility has the capacity to treat 230 million gallons per day (MGD). Portions of the facility were built in the early 1960's, and the facility has been expanded and modified since then. The facility treats the wastewater with various processes consisting of: o Screening o Grit removal o Primary sedimentation o Activated sludge with nitrification-denitrification o Secondary sedimentation o Disinfection by chlorine o Dechlorination (sodium bisulfite) Both primary and secondary solids are thickened using centrifuges in the Solids Thickening Facility prior to digestion in sixteen anaerobic digesters using multi-phase digestion. Solids are fed to an acid-phase digester then to multiple methane phase digesters. Digested sludge is dewatered using centrifuges in the Solids Handling Facility and then hauled off-site for land application. It is anticipated the design, construction administration and inspection, and construction necessary to complete the project scope will occur over multiple fiscal years with multiple construction, equipment procurement and equipment installation packages being required. The city intends to engage the services of the construction team utilizing the construction manager at risk (CMAR) delivery method to complete the construction of the project. Based on the 91st Avenue WWTP Facility Assessment, assessment updates, and previously completed work, the selected engineering consultant will review and prioritize the project scope items and make recommendations for the rehabilitation and replacement of equipment, facilities, and systems necessary to meet the project goals. The scope of this project is focused on equipment and facilities associated with the solids digestion process, including but not limited to, fixed covers on two digesters, digester mixing systems, digester control buildings, and digester heating systems. Design services by the engineering consultant may include, but are not limited to, the following: o Conduct an engineering review and analysis of the solids digestion process to insure properly sized equipment and operation of the digester system is maintained. Prepare a basis of design report, including life-cycle cost analyses, to document the engineering analysis for the replacement or rehabilitation actions to be implemented to address deficiencies; o In conjunction with City engineering, Plant Operations and Maintenance staff, and the selected Construction Manager at Risk (CMAR), the Engineering consultant will: o conduct field review(s) of the equipment, facilities and systems identified in the 91st Avenue WWTP Facility Assessment and assessment updates in the solids digestion process to identify, catalog, and prioritize the assets to be rehabilitated or replaced; o identify the scope, level and detail of construction drawings necessary to accomplish the project objectives. It is anticipated the replacement of most assets may require minimal construction drawings. At a minimum, only structural, electrical or control work requiring permitting will require construction drawings. o develop an initial schedule for the rehabilitation and replacement of the assets. Schedule shall be prioritized based on the results of the field review(s), shall include and be cognizant of plant operations and maintenance schedules, and incorporate input from the Construction Manager at Risk regarding need for detailed design packages, equipment procurement schedules, and construction timeframes. o perform necessary engineering and life-cycle cost analyses to provide recommendations for replacement equipment. o Compile existing record drawings of the solids digestion process and conduct field surveys as required to provide accurate base drawings for those tasks requiring construction drawings. o Develop a complete set of contract documents including construction drawings and specifications adhering to current City standards, regulatory guidelines, and requirements. o Attend regular meetings with the project team to discuss, coordinate, and review the work progress and budget, resolve design issues, and document meeting minutes. o Obtain all required permits for the construction and operation of the modifications; o Provide all required services as necessary to implement alternative design reviews, constructability reviews, quality control reviews that may be performed by the CMAR; o Provide design services including agency coordination, preparation of preliminary, pre-final and final plans and consultation regarding the CMAR models and final cost proposal, assistance in the bid evaluation and recommendation of contract award; o Prepare plans, specifications, cost estimates and special provisions according to direction and standards of the City; o Review and provide recommendations on value-engineering proposals developed by the CMAR; o Perform Guaranteed Maximum Price (GMP) proposal review and prepare recommendation to the City; o In conjunction with City engineering, plant operations and maintenance staff, the WAM Core Team and the selected CMAR, the engineering firm will coordinate the updating of the WAM system and database and ensure the completeness and accuracy of information provided to the WAM system; o In conjunction with City engineering, plant operations and maintenance staff, the engineering firm will provide necessary programming services to update and modify the facility's computer control and information systems as a result of work within this project; o In conjunction with City engineering, plant operations and maintenance staff, and the selected CMAR, assist with the development of necessary maintenance of plant operations plans in order to avoid disruption of the treatment process. Construction administration and inspection (CA&I) services by the engineering firm may include, but is not limited to, the following: o Conduct pre-construction conference and hold subsequent meetings, as necessary, with the project team; o Perform on-site examination of materials, equipment, and workmanship as necessary during normal construction hours; o Keep the City informed of the progress of the work, and will guard the City against defects and deficiencies in such work and will disapprove or reject work failing to conform to the contract documents; o Provide quality control services during the course of construction to assure that the overall technical correctness of the construction phase services is being followed and that construction schedule is being met; o Arrange and coordinate special inspection for structural, mechanical, and electrical work, as required; o In conjunction with City engineering, plant operations and maintenance staff, and the selected CMAR, the engineering firm will coordinate the tagging of rehabilitated or replaced assets and with the WAM Core Team, to update the Water Asset Management (WAM) system and database and ensure the completeness and accuracy of information provided to the WAM system; o In conjunction with City engineering, plant operations and maintenance staff, the engineering firm will provide necessary programming services to implement updates and modifications to the facility's computer control and information systems as a result of work within this project; o In conjunction with City engineering, plant operations and maintenance staff, and the selected CMAR, assist with the execution of necessary maintenance of plant operations plans in order to avoid disruption of the treatment process. o Review operations and maintenance manuals for completeness and adherence to City standards and requirements; o Provide start-up assistance and training services; o Prepare and review project documents (e.g. correspondence, schedules, submittals, shop drawings, test data, project data, contractor progress payments, change orders; etc.); and o Conduct a substantial and final completion inspection. Use of UNIFIER, an Application Service Provider (ASP) web-based project management database, may be required. The following information provides a guideline for utilization. Any questions related to the requirements of UNIFIER should be directed to the Project Manager. o The Consultant will be required to maintain all project records in electronic format. o The City provides an ASP web-based project management database which the Consultant will be required to utilize in the fulfillment of the contract requirements. o The Consultant shall provide a computerized networked office platform with broadband internet connectivity. o UNIFIER training will be provided through the City of Phoenix to firms under contract. Questions pertaining to this selection process or contract issues should be submitted via the Procurement Portal. Firms Notified for Interview: March 7, 2026 Interview : March 21, 2026 Selection Notification: Late March Scope Meeting: Early April