WM4830-03 Canal WTP Filter Rehabilitation and Valve Replacements

The City of Columbia is seeking a qualified contractor to rehabilitate the filter media and replace butterfly and gate valves at the Canal Water Treatment Plant (WTP). The scope includes demolition of existing filter components, installation of new filter underdrains, media, and associated equipment, replacement of AWWA‑specified butterfly and gate valves, associated piping, actuators, control system integration, testing, commissioning, and provision of spare parts and one‑year warranty support. The contractor must provide all labor, materials, equipment, traffic control, and 24‑hour emergency response, and must complete substantial work within 600 calendar days and final completion within 630 days. The bid is submitted electronically via IONWAVE, with a pre‑bid Zoom meeting on 9/24/2026 and a question cut‑off on 10/16/2026. • Rehabilitation of filter media (sand and anthracite) and underdrain systems • Replacement of AWWA butterfly valves and resilient seated gate valves • Installation of associated piping, supports, actuators, and control‑system hardware • Required on‑site supervision of media sluicing, washing, and skimming • Provision of spare parts, warranties, and post‑completion service support • Compliance with South Carolina licensing, insurance, and safety requirements • Project duration: up to 630 calendar days from notice to proceed.