2026 Water Main Improvements

The City of Napa Utilities Department is soliciting bids for the 2026 Water Main Improvements project, identified by solicitation number 2026-002-IFB-W2026-018-021. The scope of work involves the replacement of water mains on Old Sonoma Road, including the installation of new mains, valves, and appurtenances, and the establishment of three tie-in locations to connect the new main to the existing system. Specific performance areas include Pueblo Avenue from Main Street to Soscol Avenue and California Boulevard to the Railroad, as well as installations at 305-312 Soscol Avenue and Old Sonoma Road between 3050 and 3100. The contract will be awarded to the lowest responsible and responsive bidder, with potential consideration for local bidder preferences per Napa Municipal Code Chapter 2.93. Technical requirements mandate that all potable water materials be NSF 61 Certified, with PVC pipes conforming to AWWA C900 (blue, Class 305, DR-14) and ductile iron pipes meeting pressure class 350 with Type II cement mortar lining. The project must adhere to AWWA standards, Caltrans 2025 Standard Specifications for water pollution control, and USPS Standard DO41 for mailbox installations. Contractors are required to provide a full-time qualified superintendent on-site and comply with California Labor Code prevailing wage requirements. Administrative requirements include the submission of a bid bond equal to 10% of the bid amount, as well as performance, payment, and warranty bonds. Bidders must submit their proposals in PDF format via the OpenGov portal by the December 2, 2026 deadline, ensuring files are named with the company name and California Department of Industrial Relations registration number. Once awarded, the contractor must provide initial schedules and a two-week rolling schedule for approval by the City before work commences. Payments will be processed monthly, with undisputed amounts paid within 30 days of a complete application.