PRESS

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! 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.

More Stories

Newsletters

Winter 2025 Newsletter: FishSafe Francis, abrasion resistance, plant availability

In 2024, we broadened our design range to include FishSafe designs for Francis-style runners, and we removed our design limit on head height. Read the newsletter to catch up!

Press

The Restoration Hydro Turbine is a Reason to be Cheerful

CTO Abe Schneider talks to Reasons to be Cheerful's Eric Krebs about the RHT and how critical it is to make hydro retrofits fish-safe.

Video

Video: Our Planet is Facing Twin Crises of Climate Change and Biodiversity Loss

We need hydropower solutions that prioritize biodiversity alongside renewable energy production.