TDA Auxiliary Water Supply (AWS) Backup Debris Management

The U.S. Army Corps of Engineers (USACE) Portland District is soliciting construction firms for the TDA Auxiliary Water Supply Backup Debris Management project. The project involves designing and building a mechanical method for dislodging debris from the trashracks at the East Fish Ladder (EFL) Auxiliary Water Supply Backup (AWSB) system intake. The project includes pavement repairs, trenching, and the installation of a telescoping boom mounted rotating bristle brush. The equipment will be mounted on the upstream forebay structure and accessed from a fixed access platform with a transition to a traveling trolley platform. Key aspects of the project include: • Pavement repairs and trenching required for power and controls • Mechanical equipment associated with the rotating brush • Structures to be included in the project, such as fixed upper and lower operator/mechanic platforms • Electrical power supplied from MCC FCQ7 in the service gallery of the eastern non overflow dam • Control of the equipment will be from the vendor supplied control system The project is anticipated to start in late 2026 and be completed by the end of 2028. The estimated construction cost is between $1,000,000 and $5,000,000.