How big can a fish be and still pass through the Restoration Hydro Turbine (RHT) safely? Pretty big! This passage test of 186 rainbow trout measuring up to 500 mm (~19.7 in) in length found no meaningful difference between the fish passed through a 1.9 m (~ 6.2 ft) diameter RHT and the control group, who were not passed through any turbine.
This fish passage test was conducted jointly by Natel Energy and Pacific Northwest National Laboratory (@PNNL) in the spring of 2022, at Natel's Monroe hydropower plant in Culver, Oregon.
For more info about Natel's fish passage testing and peer-reviewed papers, visit our fish passage page.
Natel co-founder Gia Schneider talks to host Dunya Jovanović about why the hydropower industry needs FishSafe turbines to adapt to a changing planet.
A 4-minute film about Natel Energy and founders Gia Schneider and Abe Schneider, part of the NextNow digital series profiling solutions to climate change and the people behind those solutions.
An article in NHA's POWERHOUSE explores how the Monroe Drop project provides a compelling case study of how hydropower can prioritize both efficiency and sustainability.