Dardenne Tank Rehabilitation Project

The Dardenne Tank Rehabilitation Project, managed by the Las Virgenes Municipal Water District in Calabasas, California, involves the comprehensive restoration of the Dardenne Tank. The scope of work includes the total removal and replacement of interior and exterior coatings, pinhole and rafter repairs, and various site improvements such as replacing the perimeter fence and gate. Critical technical requirements include the installation of a submersible tank mixing system, roof hatch and vent replacements, and the installation of cathodic protection. To maintain operations, the contractor must install and disinfect temporary water storage tanks of at least 93,000 gallons before beginning rehabilitation. All interior materials must be NSF-61 certified, and the completed tank must pass a 24-hour leak test and a formal disinfection process. The contract will be awarded to the lowest responsible bidder, with a submission deadline of October 23, 2026. Bidders must be QP-1/QP-2 certified or demonstrate ten years of similar experience. The successful contractor is required to provide performance and payment bonds each equal to 100 percent of the contract price and adhere to prevailing wage laws. Project administration will be managed through the Construction Information and Project Optimization software, and work hours are subject to local HOA regulations. Final payment is structured at 95 percent of the actual work value upon satisfactory completion, with the remaining undisputed funds released within 30 days of the recordation of a notice of completion.