This Solicitation opportunity from Arizona was posted on January 8, 2026. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

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SUB-REGIONAL OPERATING GROUP - 91ST AVENUE WASTEWATER TREATMENT PLANT SOLIDS REHABILITATION PHASE 2 - ENGINEERING SERVICES

Closed

WS90100117-ENGState & Local

Submission Closed02/20/2026, 07:00:15 PM UTC

Contract Overview

Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.

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NAICS: 541330

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AI Contract Overview

The 91st Avenue Wastewater Treatment Plant, owned by the Sub-Regional Operating Group and operated by the City of Phoenix, is a large facility with a treatment capacity of 230 million gallons per day, established on a 560-acre site. The plant processes wastewater through multiple stages including screening, sedimentation, activated sludge treatment, disinfection, and solids thickening, digestion, and dewatering. The solids treatment includes a complex multi-phase anaerobic digestion system involving sixteen digesters. The facility has undergone expansions since its original construction in the 1960s, reflecting ongoing efforts to maintain and upgrade its infrastructure. The City of Phoenix is seeking engineering services for the rehabilitation of the solids treatment facilities and equipment, focusing on repairs and replacements within the digestion process. This includes work on fixed covers, pumps, motors, heat exchangers, piping, valves, control systems, and various electrical components such as panels and motor control centers. The project is expected to span multiple fiscal years and involve multiple phases of design, construction administration, inspection, and equipment procurement and installation. Construction will be managed using a Construction Manager at Risk delivery method. The solicitation is managed by the Design and Construction Procurement agency in Phoenix, Arizona, with proposals due by February 20, 2026.

General Info

City of Phoenix seeks multi-year engineering services for 91st Avenue plant solids treatment rehabilitation.

Agency

Arizona → Design and Construction Procurement

NAICS

541330 - Engineering Services

Place of Performance

AZ, USA

Set-Aside

NONE

Documents

City of Phoenix Project Addendum No. 1

2 pages · amendment

High

City of Phoenix Subcontractor Selection Plan Excerpt

3 pages · contract-document

High

Consultant Reference Check Instructions and Evaluation Form WS90100117-ENG

consultant-reference-check

High

Department of the Interior Grants Management General Award Terms and Conditions

9 pages · contract-document

High

Design-Build Team Reference Check Instructions and Evaluation Form

5 pages · reference-check-instructions

High

RFQ for 91st Avenue WWTP Solids Rehabilitation Phase 2 Engineering Services

14 pages · rfq

High

AI Contract Breakdown

Uniform Contract Format

Timeline

PhaseClosed

PostedJan 8

Solicitation

Response DeadlineFeb 20

Deadline has passed

Submission Closed

02/20/2026, 07:00:15 PM UTC

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Organization & Contact Information

AgencyArizona → Design and Construction Procurement

Contacts1 person available

OfficePHOENIX, AZ, 85003, USA

Organization / AgencyArizona → Design and Construction Procurement

Office AddressPHOENIX, AZ, 85003, USA

Contacts

Julie SmithContract Specialist II

contact@example.gov

+1 (555) 000-0000

Interested Companies (32)

imsSan Diego, CA

Rider Levett BucknallLos Angeles, CA

ConstructConnectCincinnati, OH

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Full Description

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. 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. 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.