PRESS

Video: Testing Passage of Adult Rainbow Trout Through Natel's FishSafe Restoration Hydro Turbine (RHT)

July 8, 2022

The most recent Natel/Pacific Northwest National Laboratory test of 186 large rainbow trout measuring up to 500 mm (19. 7 inches) in length, found no meaningful difference between the fish passed through Natel’s 1.9 meter (roughly 6 feet) in diameter turbine and the control group, indicating that the RHT allows safe passage of some of the largest fish ever successfully passed through a compact hydro turbine.

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Video

Video: Test of rainbow trout passage through the RHT

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

Newsletters

2025 Year-in-Review Newsletter

2025 was a year for scaling and we're entering 2026 with serious momentum: large-scale hydro design study,  publication with PNNL, upcoming installations in the US and EU.

Press

WPTO Encourages Hydropower Modernization and Highlights Natel

This article from the Water Power Technologies Office includes a photograph of Natel's technology and encourages the adoption of turbines that are safe for fish to pass through.