Request for Statements of Prequalification - General Contractors - Secondary Process Improvements Phase 1

Solicitation No.

22126-B

Type / RFx

Bid

Status

Bidding

Level

local

Published Date

March 18, 2026

Due Date

April 22, 2026

NAICS Code

236220AI guide

Jurisdiction

Delta Diablo

State

California

Agency

Delta Diablo

Delta Diablo is requesting Statements of Prequalification (SOPQ) from qualified General Contractors interested in bidding on the Secondary Process Improvements Phase 1 Project (Project No. 22126). In accordance with California Public Contract Code Section 20101, only contractors determined by the District to be prequalified will be eligible to submit a bid for the Project.The Project will provide major upgrades to the District’s wastewater treatment facility in Antioch, California, including construction of new aeration basins, a return activated sludge pump station, a secondary clarifier, solids thickening improvements, a new 2.5-megawatt emergency backup generator, and associated electrical, process, and site infrastructure improvements.The estimated construction value is approximately $140 million to $175 million. Construction bids are anticipated to be advertised in June 2026 following completion of the prequalification process. Estimated Bid Value: Prequalification for Estimated $140 million to $175 million project Pre-Bid Meeting Information: No Online Q&A: Yes Location Information: Department: Engineering Address: 2500 Pittsburg-Antioch HwyAntioch, California94509 County: Contra Costa License Requirements: Class A Other Details: SOPQ submittals must include one (1) signed hard copy and one (1) electronic copy on a flash drive in a sealed envelope delivered to Delta Diablo by the submittal deadline. See the Request for SOPQ documents for complete submittal requirements.

1. March 18, 2026Published
2. April 22, 2026Responses Due