Renovation of a water / sewer project in Phoenix, Arizona. Completed plans call for the renovation of a water / sewer project.

The City of Phoenix is Requesting Qualifications for Sub-regional Operating Group - 91st Avenue Wastewater Treatment Plant Solids Rehabilitaton Phase 2 - Construction Manager at Risk. Question Deadline 02/13/2026 at 4:00 PM MT Questions pertaining to this selection process or contract issues should be submitted via the Procurement Portal. The City of Phoenix is seeking a qualified contractor to provide preconstruction services and complete construction services for the Sub-Regional Operating Group - 91st Avenue Wastewater Treatment Plant Solids Rehabilitation Phase 2 Construction Manager at Risk (CMAR) project. This project will include the rehabilitation and replacement of equipment associated with solids digestion, including, but not limited to, replacement of fixed covers for 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 selected CMAR will work as a team with the designer of record and City staff to ensure an efficient design approach for the project. This project will be funded in part by the U.S. Bureau of Reclamation. Respondents are advised to review the requirements outlined in Attachment A, which includes the Department of the Interior's Office of Grants Management guidance. Compliance with all applicable federal regulations is mandatory. 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: Screening Grit removal Primary sedimentation Activated sludge with nitrification-denitrification Secondary sedimentation Disinfection by chlorine 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. This project will include the rehabilitation and replacement of equipment associated with solids digestion, including, but not limited to, replacement of fixed covers for 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. It is anticipated the design 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.