Water Treatment Plant Sedimentation Basin Plate Settlers Project RFP (2027004-PU-DB)

The City of Harrisonburg, Virginia, is soliciting proposals for a firm-fixed price design-build contract to enhance the sedimentation basins at the Harrisonburg Water Treatment Plant. This solicitation, identified as DB-129405 (2027004-PU-DB), is the second step of a two-step process and is open only to firms previously selected in Step 1. The scope of work requires the contractor to provide and install a complete Plate Settler System and a hose-less Sludge Removal System, including all necessary components such as inlet diffusers, flow control decks, collection troughs, and automatic control systems. Performance requirements specify that the effluent trough must maintain a daily average turbidity of 1.0 NTU or less 95% of the time, and all materials in contact with potable water must be NSF ANSI Standard 61 certified. The selection process is based on best value, evaluating technical proposals, cost proposals, and in-person interview performances, followed by negotiations with the highest-ranked offerors. Proposals must be submitted via the eVA platform by December 10, 2026, and must follow a strict format, including specific attachments and a technical proposal delivered as a PowerPoint output document. Successful offerors will be required to post performance and payment bonds totaling 100% of the contract sum. Project milestones include design, material delivery, and commissioning, with a critical supply chain assumption of 200 days. Quality assurance measures include factory inspections prior to shipment and documented field testing, where failure of a test requires the replacement of the entire plate pack at no cost to the City.