Rattlesnake Dam Outlet Pipe Rehabilitation

Irvine Ranch Water District (IRWD) is soliciting sealed bids for Rattlesnake Dam Outlet Pipe Rehabilitation under Invitation #12101, with bids due September 17, 2026 at 2:00 p.m. (PDT) and a mandatory pre-bid meeting and site visit on August 27, 2026 at 10:00 a.m. at IRWD Headquarters in Irvine. Bidding is restricted to prequalified contractors registered with California Department of Industrial Relations (CADIR) as DIR Public Works Contractors who are already on the project's prequalified bidders list; prequalification is closed.

The scope includes spray-in-place pipe (SIPP) lining of existing 30-inch and 24-inch outlet pipes, replacement of two 30-inch butterfly valves and one 24-inch butterfly valve with actuators, improvements to existing valve stem extensions and appurtenances, installation of new air vent piping, and removal of an existing outlet structure. IRWD has pre-purchased all butterfly valves and actuators; the contractor must coordinate installation of district-supplied equipment.

The estimated bid value is $4.424 million under a lump-sum award type. Project duration is 225 calendar days from the Notice of Award. A bid bond of 10 percent, performance bond of 100 percent, and payment bond of 100 percent are required. Liquidated damages are assessed at $2,000 per calendar day.

The online question and answer deadline is September 3, 2026 at 3:00 p.m. (PDT). Bids must be submitted electronically through the PlanetBids Vendor Portal with line items and subcontractor bid forms required. Contact Michael Lu at IRWD ((949) 453-5658 or lumi@irwd.com) for inquiries; submit bids to Kathleen Labrador at MKN & Associates, LLP (Ardurra Group, Inc.).