Specification No. 26-05, C51694, Knights Landing Outfall Gates (KLOG) Retaining Wall Rehabilitation

The California Department of Water Resources is requesting sealed bids for Knights Landing Outfall Gates Retaining Wall Rehabilitation (Specification No. 26-05, Contract No. C51694) with bids due July 8, 2026 at 2:00 p.m., with a mandatory site inspection on June 24, 2026 at 10:00 a.m. A California Class A General Engineering Contractor license is required to bid. The Department has established a 25% Small Business Enterprise participation goal and will apply a Disabled Veteran Business Enterprise incentive during bid evaluation.

The work includes installing vertical stainless-steel hollow structural section tubes at 4-foot centers on both sides of an existing concrete retaining wall, coring through concrete and soil for horizontal stainless-steel rod installation, excavating trenches for steel rods with casing and grouting, concrete crack repair via epoxy injection, concrete spall repair with new concrete placement, and removing one tree with root grinding. All structural steel must meet ASTM A554 Type MT-316L specifications. The project is located in Yolo County at the Colusa Drain facility in Knights Landing, California. The staging area is approximately 7,440 square feet with maximum equipment weight limits of 6,500 pounds per vehicle. The contractor must verify existing utility locations and comply with the 2022 California Building Code; seismic design incorporates a 2,475-year return period peak ground acceleration of 1.127g.

The estimated cost range is $650,000 to $950,000. Prevailing wage rates apply per Department of Industrial Relations requirements. Bidders may propose alternatives to specified brand names and products with complete descriptive data and samples submitted at least 14 days before bid opening. Questions must be submitted to doe_specs@water.ca.gov at least five days prior to bid opening. A public bid opening will be held at an announced location and via webinar. Inspection trip attendance requires confirmation with the Department at least two days in advance; attendees must provide their own personal protective equipment including hard hat, safety vest, and work boots.