Natel/PNNL test of 186 rainbow trout measuring up to 500 mm indicated that the RHT allows safe passage.
A peer-reviewed paper written in conjunction with Alden Lab and published in the Journal of Ecohydraulics.
Abe Schneider and Sterling Watson lay out the argument for FishSafe™ turbines in this paper published in The International Journal of Hydropower & Dams, Issue 5.