Description
The County of Clackamas is seeking qualified contractors to refurbish and upgrade the four aeration basins at the Tri‑City Wastewater Treatment Plant. Work includes demolition of existing structures, concrete repairs, replacement of air‑lift and high‑pressure air piping, installation of new diffusers, valves, actuators, PLC‑based control systems, electrical panels, instrumentation, and associated site‑specific safety and environmental controls. The contract is a competitive sealed‑bid public‑works project subject to Oregon prevailing‑wage statutes, requiring bid bonds, performance and payment bonds, and a robust quality‑control and warranty program. The scope is phased across two summer shutdown periods with fixed milestones of September 30 2027 and September 30 2028, and an overall contract period of 700 calendar days after notice to proceed.
• Civil/structural repairs, concrete demolition and coating, and concrete‑cover special inspections.
• Mechanical/piping upgrades: ALP/AHP air‑lift piping, diffusers, valves, pneumatic actuators, and flow‑control devices.
• Electrical & instrumentation: new PLC, remote I/O, transformers, panels, DO probes, flow meters, and fiber‑optic communication.
• Mandatory pre‑bid conference on Oct 21 2026; strict compliance with safety, environmental, bonding, and prevailing‑wage requirements.