Kleinschmidt teamed with other consultants and led the design efforts for the design of a 1,000-cubic-feet-per-second (cfs) Floating Surface Collector (FSC) in the North Fork Reservoir for downstream fish passage. Fish are attracted into the FSC using 18 submersible attraction flow pumps and then travel down a screen channel which dewaters the fish flow down to 7 to 10 cfs for transport downstream. The project includes the FSC; a guide net to lead fish to the FSC entrance; a transport pipe including a submerged hose, a passage cored through the dam with an emergency shutoff valve, a unique fish friendly flow control facility specifically designed by Kleinschmidt | R2 for this application, 1,200 feet of 20-inch-diameter transport pipe; and a tertiary screening structure (TSS). The TSS combines the fish collected from the FSC with fish from an existing collector and then removes some of the combined flow to not exceed the capacity of the remaining bypass pipe. The TSS includes two plastic traveling screens with automated flow control to remove excess flow and debris from the fish bypass flow. Following design of the FSC and TSS, we provided procurement and construction observation support as well as oversaw the final adjustments and commissioning of the project.

Our team worked collaboratively with PGE to develop the concepts for the entire project and assisted with agency negotiations resulting in approvals. We successfully managed the multiple firm design team to ensure the project met the fish-related design and operating goals. Construction of the FSC and TSS were completed on schedule, and the project is a major component in PGE’s highly successful fish passage and restoration on the Clackamas River.