Marine Outfall Diffuser & Anode Replacements

This project involves the replacement of diffuser nozzles and anodes on the Joint Marine Outfall serving the West County Wastewater (WCW) treatment facility and City of Richmond Wastewater Treatment Plant (COR WWTP). The outfall discharges treated effluent into the San Francisco Bay approximately 31 feet below the water surface. The outfall consists of approximately 1,050 feet of 54-inch reinforced concrete pipe (RCP) and 12,025 feet of 72-inch RCP, originally constructed in 1978. The last 1,100 feet of the outfall contains 140 diffuser ports that were last rehabilitated in 1993 with Tide Flex diffuser nozzles. The current project scope is based on a January 17, 2020 inspection report identifying diffusers and anodes requiring replacement or minor repairs.

Key dates for this solicitation include: Pre-Proposal Meeting on November 15, 2022 at 10:00 PM (Pacific Time); Questions and Answers deadline of November 19, 2022 at 1:00 AM (Pacific Time); and Proposal Deadline of November 29, 2022 at 10:00 PM (Pacific Time). This is an informal bid solicitation under the CUPCCAA process for projects between $75,000 and $220,000 (2025 threshold). All bidders are required to submit pricing proposals and complete the vendor questionnaire included in the bid documents.

The scope of work is detailed in Attachment F and specifications are provided in the combined specifications document. Bidders must review the January 2020 inspection report (Attachment E) which governs quantities in the event of any conflicts with other documentation. Historical plans from 1980 and 1993 repair plans are provided as reference materials. Interested vendors should contact the procurement contact for submission instructions and additional technical information.