2027 CIPP Lining Project

The 2027 CIPP Lining Project, solicitation number CIP 27701, is a public works contract issued by the Napa Sanitation District for the rehabilitation of approximately 12,159 linear feet of 6-inch, 8-inch, 10-inch, and 12-inch sewer mains using the cured-in-place pipe lining method. The estimated cost of construction is 682,000 dollars, and the successful bidder must substantially complete the project within 240 calendar days from the Notice to Proceed. The work will be performed in Napa, California, and requires the contractor to hold a valid Class A License. To be considered responsive, bidders must attend a mandatory pre-bid conference on November 12, 2026, and conduct a mandatory site visit. Sealed bids are due by 2:00 PM on December 2, 2026, and must include a certified check or bidder's bond for at least 10 percent of the bid amount. Additionally, all contractors and subcontractors must be registered with the Department of Industrial Relations per Labor Code section 1725.5. Awardees are required to provide performance and payment bonds for 100 percent of the contract amount, a maintenance bond for 10 percent, and appropriate workers' compensation coverage within ten days of notification. All work must adhere to California Labor Code safety standards for trenching and excavation, including specific bid items for sheeting, shoring, and bracing.