This Solicitation opportunity from California was posted on August 28, 2026. The submission period has ended. Browse the details below for market research, or find similar active opportunities.

Top

Aeration Basin Mixing Project

Closed

20260827047State & Local

Submission Closed09/24/2026, 09:00:00 PM UTC

Contract Overview

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

Active Opportunities Like This One

NAICS: 237110

New

IEUA RMPU Basin Improvements Project Montclair Basin Improvements

Solicitation # ieua-rmpu-basin-improvements-project-montclair-basin-improvements

The IEUA RMPU Basin Improvements Project involves construction improvements at Montclair Basin 2 and 3 in Chino, California. The primary objective is to divert available storm flows from the San Antonio Creek Channel into existing basins to facilitate groundwater recharge. The scope of work is comprehensive, requiring all materials, labor, tools, equipment, and transportation necessary to furnish, install, commission, and deliver a fully functional project. Key activities include civil and site work such as grading, demolition, saw cutting, cold planing, and trucking, as well as the installation of concrete pipes and structures. Specialized services required for the project include traffic control, SWPPP, construction surveying, electrical work, welding, and preconstruction video. Norstar Plumbing and Engineering, Inc. is the prime contractor seeking certified and qualified DBE, MBE, SBE, and WBE subcontractors and suppliers to support these efforts. The solicitation is categorized under NAICS code 237110. Interested parties must submit their bids by October 29, 2026, at 2:00 PM. Detailed plans and specifications are available through the Inland Empire Utilities Agency bidding website. Primary points of contact for this opportunity are Nathan Plummer and Destiny Plummer.

Norstar Plumbing and Engineering, Inc

POSTED

DEADLINE

Morgans Branch Force Main and Pump Station Improvements

Solicitation # SRP-W-134-0290

The Morgans Branch Force Main and Pump Station Improvements project, solicitation number SRP-W-134-0290, is a construction effort for the City of Belmont, North Carolina, with a project estimate of 16,690,000 dollars. The scope of work involves the installation of 16,435 linear feet of new 20-inch ductile iron force main and comprehensive upgrades to the Morgans Branch Pumping Station. Key station improvements include the installation of a new wet well, valve vault, and associated appurtenances, as well as the demolition of existing pumps and piping. The project also requires the installation of new gravity sewers, manholes, and related site work including excavation, paving, and erosion control. The contract will be awarded to the responsible bidder submitting the lowest responsive bid, with a strong emphasis on qualifications, financial ability, and MWBE compliance. Bidders must submit a signed EJCDC C-410 Bid Form, a bid bond, and evidence of authority to sign. The project is governed by EJCDC standard general and supplementary conditions, requiring performance and payment bonds and insurance with an A.M. Best rating of A-VII or better. Performance begins upon the issuance of a Notice to Proceed, and payments are processed monthly via applications for payment submitted to the Engineer, becoming due 30 days after presentation to the owner.

Don Moorhead Construction, Inc.

POSTED

DEADLINE

WC 1456 Lead Pipe Inspection

Solicitation # wc-1456-lead-pipe-inspection

Spiniello Companies is seeking quotes from Minority and Women-Owned Business Enterprises for the City of Baltimore Department of Public Works project WC 1456, which focuses on lead pipe inspection and replacement in Maryland. This solicitation is open to various small business set-asides, including Veteran Owned, Service-Disabled Veteran Owned, Women-Owned, and HUBZone certified businesses. Interested parties should submit their quotes to estimating@spinielloco.com by the deadline of November 4, 2026. While the primary NAICS code is 237110, the project also considers codes 237310, 561990, 238910, 541730, and 237990. For further inquiries, the primary point of contact is Katherine Snider.

POSTED

DEADLINE

Recharge Master Plan Update (RMPU) Basin Improvements Project Montclair Basin Improvements

Solicitation # recharge-master-plan-update-rmpu-basin-improvements-project-montclair-basin-improvements

The Recharge Master Plan Update Basin Improvements Project focuses on infrastructure enhancements for the Montclair Basin located in San Bernardino County, California. Commissioned by the Inland Empire Utilities Agency and managed through Big Ben Engineering, this project falls under solicitation number IFB-JV-26-015 and is categorized under NAICS code 237110 for heavy and civil engineering construction. This opportunity is specifically set aside for small businesses. Interested parties must submit their responses by the deadline of October 29, 2026. Primary coordination for the project is handled by Sep Sharifi, who serves as the main point of contact for inquiries regarding the bidding process and project specifications.

POSTED

DEADLINE

Alvarado Trunk Sewer Ph IV and Water Main Relocations Bid Package A, Contract K-27-2470-DBB-3-C

Solicitation # K-27-2470-DBB-3-C

Flatiron Dragados Constructors, Inc. is soliciting bids for the Alvarado Trunk Sewer Ph IV and Water Main Relocations Bid Package A, Project No. K-27-2470-DBB-3-C, for the City of San Diego. This CASRF and EPA funded project is located in California and seeks quotes from subcontractors and suppliers for a wide range of services, including infrastructure and utilities such as electrical work, pipe supply, and water truck services; material supply for aggregate, geotextile, and ready mix concrete; and professional services including surveying, QC testing, and biological services. The solicitation is set aside for SBA certified Women-Owned Small Businesses and Disadvantaged Business Enterprises. Bids must be submitted via email or fax by October 28, 2026, at 2:00 PM and must remain valid for 120 days. All subcontractors are required to hold a valid California contractor license and be registered with the California Department of Industrial Relations per Public Contract Code Section I725.5. The project is subject to a Project Labor Agreement. Additionally, Flatiron Dragados reserves the right to require payment and performance bonds equal to 100 percent of the contract value, with actual bond premium costs reimbursed up to a maximum of 3 percent. Primary contact for this solicitation is Veronica Garcia.

Flatiron Dragados Constructors, Inc.

POSTED

DEADLINE

Greenfield Wastewater Treatment Plant Upgrade Project

Solicitation # greenfield-wastewater-treatment-plant-upgrade-project-0

The City of Greenfield is seeking bids for the Greenfield Wastewater Treatment Plant Upgrade Project, identified as contract number 2026-03. Located in Monterey, California, this solicitation is managed by Anderson Pacific Engineering Construction, Inc. under NAICS code 237110. The project is specifically set aside for small businesses, including SBA certified Women-Owned Small Businesses, HUBZone Small Businesses, SAM.gov designated Small Disadvantaged Businesses, and Department of Transportation Disadvantaged Business Enterprises. Interested parties must submit their responses by the deadline of November 10, 2026. For further inquiries or submission details, the primary point of contact is the Estimating Department at Anderson Pacific Engineering Construction, Inc., reachable via email at estimating@andpac.com or by phone at 408-970-9900.

Anderson Pacific Engineering Construction, Inc.

POSTED

DEADLINE

AMERICAN BOTTOMS RWTP – SLUDGE HANDLING FACILITY

Solicitation # american-bottoms-rwtp-sludge-handling-facility

River City Construction, LLC is seeking qualified subcontractors for the American Bottoms RWTP Sludge Handling Facility project located in Illinois. The scope of work is comprehensive, covering site work, earthwork, utilities, and the construction of structures involving concrete, masonry, metals, and various finishes. Additionally, the project requires the installation of plumbing, HVAC, electrical systems, and specialized water and wastewater equipment, including material processing, handling, and purification storage systems. This solicitation is specifically set aside for Small, Disadvantaged, Minority, Women’s, Service Disabled Veteran Owned, and Veteran Owned businesses. To be considered, bidders must submit their official certification of status along with their bid. Proposals will be evaluated and awarded based on the low responsive bid received. The bid opening is scheduled for November 5, 2026, at 2:00 PM. Interested parties should coordinate with JR Peterson for further details and access to bid documents via the SmartBidNet system.

River City Construction, LLC

POSTED

DEADLINE

Alvarado Trunk Sewer PH IV and Water Main Relocations Bid Package A

Solicitation # alvarado-trunk-sewer-ph-iv-water-main-relocations-bid-package

The Alvarado Trunk Sewer PH IV and Water Main Relocations Bid Package A is a solicitation for infrastructure work located in San Diego, California. Managed by the City of San Diego under contract number K-27-2470-DBB-3-C, the project focuses on sewer and water main relocations. KTA Construction Inc. is listed as the agency contact for this opportunity, with Brin Ragsdale serving as the primary point of contact. This opportunity is specifically set aside for small businesses, including SBA certified Veteran Owned, Service-Disabled Veteran Owned, Women-Owned, and HUBZone small businesses. Falling under NAICS code 237110 for heavy and civil engineering construction, the solicitation was posted on October 23, 2026, with a response deadline of October 28, 2026.

KTA Construction Inc.

POSTED

DEADLINE

MWWTP Secondary Reactors Rehabilitation, Phase 2

Solicitation # mwwtp-secondary-reactors-rehabilitation-phase-2-0

The MWWTP Secondary Reactors Rehabilitation, Phase 2 project is a solicitation for construction services located in Oakland, California. Managed by Anderson Pacific Engineering Construction, Inc. for the East Bay Municipal Utility District under contract number SD-462, the work falls under NAICS code 237110. The project is specifically designated as a set-aside for Small Businesses, including SBA certified Women-Owned Small Businesses, SAM.gov designated Small Disadvantaged Businesses, and Department of Transportation Disadvantaged Business Enterprises. Interested parties must submit their responses by the deadline of November 18, 2026. Inquiries regarding the solicitation should be directed to the Estimating Department at Anderson Pacific Engineering Construction, Inc. via email or phone.

Anderson Pacific Engineering Construction, Inc.

POSTED

DEADLINE

Solicitation # greenfield-wwtp

The City of Greenfield is seeking bids for the Greenfield WWTP project located in Monterey, California, under contract number 2026-03. This solicitation is being managed by Clark Bros., Inc., with Saif Misbah serving as the primary point of contact. The project falls under NAICS code 237110, focusing on water and sewer infrastructure. This opportunity is specifically set aside for small businesses, including Small Disadvantaged Businesses, Women-Owned Small Businesses, HUBZone Small Businesses, and Veteran-Owned Small Businesses. The solicitation was posted on October 23, 2026, and requires a response by the deadline of October 28, 2026.

POSTED

DEADLINE

Main Wastewater Treatment Plant Secondary Reactors Rehabilitation Phase 2 in CA

Solicitation # main-wastewater-treatment-plant-secondary-reactors-rehabilitation-phase-2-ca

Garney Pacific, Inc. is seeking quotes from qualified subcontractors for the Main Wastewater Treatment Plant Secondary Reactors Rehabilitation Phase 2 project located in Oakland, California, for the East Bay Municipal Utility District. The comprehensive scope of work involves the rehabilitation of covered and open concrete structures, including concrete resurfacing, restoration, and the installation of platforms and access improvements. Mechanical and piping requirements include the relining, modification, or replacement of small and large diameter steel and ductile iron pipes, pipe supports, valves, and piping appurtenances, as well as the installation and operation of a temporary 11 MGD pumped bypass. Additionally, the project entails the rehabilitation of reactor mixers and aerators, modifications to sluice and slide gates, rerouting of sump pump discharge lines, excavation, trench work, and surveying. Electrical and instrumentation work includes the installation of new systems, improvements to existing instrumentation, and the rehabilitation and replacement of motor control center components. This solicitation is open to small businesses, including certified Veteran Owned, Service-Disabled Veteran Owned, Women-Owned, and HUBZone small businesses. All subcontractors are required to utilize union labor and must be prepared to provide a 100 percent Payment and Performance Bond from a US Treasury listed Surety Company, providing their bond rate at the time of bid for reimbursement. Quotes for services and supplies, including lead abatement, metals fabrication, and painting and coatings, are due by November 17, 2026, with the final bid date set for November 18, 2026.

POSTED

DEADLINE

Construction of the Recharge Master Plan Update Basin Improvements Project Montclair Basin Improvements, Project No. RW15003.03

Solicitation # construction-recharge-master-plan-update-basin-improvements-project-montclair-basin-improvements

The Inland Empire Utilities Agency is seeking a contractor for the Construction of the Recharge Master Plan Update Basin Improvements Project, specifically focusing on Montclair Basins 2 and 3 in California. The primary objective of the project is to construct improvements that will divert storm flows from the San Antonio Creek Channel into the existing basins to facilitate groundwater recharge. The selected contractor will be responsible for providing all necessary materials, labor, equipment, and facilities to ensure the project is fully installed, commissioned, and functional according to the bid documents. This solicitation is designated as a small business set-aside, welcoming applications from various certified entities including small disadvantaged, women-owned, HUBZone, and veteran-owned businesses. Interested parties must submit their responses by October 29, 2026. The project falls under NAICS code 237110, and inquiries can be directed to the primary point of contact, Jordan Villalobos.

Inland Empire Utilities Agency

POSTED

about 3 hours ago

DEADLINE

in 6 days

AI Contract Overview

The San Elijo Joint Powers Authority is soliciting bids for the Aeration Basin Mixing Project at the San Elijo Water Campus in Cardiff, California. The project involves the installation of sixteen owner-furnished large bubble accumulator mixers within the anaerobic and swing zones of Aeration Basins 2 and 3. The selected contractor will be responsible for modifying existing stainless steel air headers and providing all necessary supports, fittings, piping, valves, and fasteners not supplied by the owner. The work must be completed within 60 calendar days from the issuance of the Notice to Proceed, with the overall agreement remaining in effect until December 31, 2027. The contract will be awarded to the lowest responsible, qualified bidder. Qualification requires a valid California Class A General Engineering Contractor License and a proven track record of at least five mechanical and piping improvement projects at wastewater treatment plants in California completed within the last seven years, specifically demonstrating expertise in stainless steel and pressurized air piping. Bidders must be registered with the Department of Industrial Relations and provide performance and payment bonds equal to the contract cost. Final acceptance is contingent upon successful installation, pressure testing, operational demonstration, and a manufacturer's field observation. Bids are due by 2:00 PM PDT on September 24, 2026, via the Planet Bids portal.