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How reinvented turbines are boosting a cornerstone of the renewables revolution—and protecting fish

May 12, 2025

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Video: Test of rainbow trout passage through the RHT

Preliminary study conducted at Natel's in-house fish passage testing facility.

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Video: Freedom Falls Restoration Hydro Turbine

Assembly and installation of the Restoration Hydro Turbine (RHT) in Freedom, Maine.

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Video: Go Behind the Scenes of Latest Fish Passage Study with Pacific Northwest National Laboratory

How big can a fish be and still pass through the Restoration Hydro Turbine (RHT) safely? Pretty big!