Holyoke Hydroelectric, Hadley Falls Station
Alden’s engineers and biologists conducted extensive CFD modeling and biological evaluations to help the Holyoke Gas & Electric Department (HG&E) develop an effective downstream passage solution for endangered shortnose sturgeon at the Hadley Falls Station on the Connecticut River. The results of these studies produced engineering and hydraulic design criteria for an exclusion rack and downstream bypass. The CFD modeling examined flow conditions for several alternative rack designs, as well as the bypass discharge to ensure safe downstream passage of fish and minimal interference of upstream migrants trying to locate the entrance to a fish lift. Alden also developed conceptual designs and preliminary cost estimates for the preferred alternatives and conducted biological testing in a large laboratory flume with various configurations of bar racks and bypass entrance designs with juvenile shortnose sturgeon. Agency acceptance of the final design was obtained by HG&E after Alden completed a desktop analysis of total downstream passage survival using the laboratory bypass efficiency data and theoretical estimates of turbine survival.
Capability
Natural Resources & Environmental PlanningServices
Fish Passage Design, Modeling and TestingFish Protection Design, Modeling and Testing
Related Projects
Civil Infrastructure | Natural Resources & Environmental Planning
Saccarappa Falls Nature-Like Fishway Modeling and Design
Innovative 3D CFD modeling was used to design a fishway to mimic natural bedrock following removal of tow spillway dams.
Natural Resources & Environmental Planning
Using Turbine Survival Models and Existing Data to Understand the Impacts of Hydropower Projects on an Endangered Species
Using Turbine Survival Models and Existing Data to Understand the Impacts of Hydropower Projects on an Endangered Species