WM4830-03 Canal WTP Filter Rehabilitation and Valve Replacements

The City of Columbia is seeking a qualified contractor to perform comprehensive filter rehabilitation and valve replacement work at the Canal Water Treatment Plant (WTP). The scope includes demolition, trenching, installation of new filter underdrains, replacement of a variety of valve types (butterfly, gate, actuators), associated piping, concrete repairs, protective coatings, and full commissioning. The contractor must provide all labor, equipment, materials, traffic control, and 24‑hour emergency response, and must adhere to a 600‑day substantial completion schedule with a total contract period of 630 days. The project includes extensive documentation, as‑built drawings, spare‑parts inventory, and a one‑year warranty. Liquidated damages of $1,000 per day apply for missed milestones. • Replace and rehabilitate filter media and underdrains • Remove and replace aging valves (AWWA butterfly, resilient gate, ductile iron, etc.) • Install new piping, supports, and actuators • Provide traffic control, site safety, and 24‑hr emergency coverage • Complete testing, commissioning, and final close‑out documentation • Deliver spare parts and one‑year warranty • Meet strict schedule: 600 days to substantial completion, 630 days total • No DBE requirements for this bid.