PNNL

Abstract

Our studies to date show that juvenile lamprey are not likely to be harmed by changes in pressure or shear conditions that occur during turbine passage. They are, however, vulnerable to impingement on 1/8-inch submersible bar screens because of their weak swimming ability and their tendency to use their tail to move about on the structure. Because of their tendency to swim low in the water column, the lamprey have a higher potential for turbine entrainment than do the anadromous salmonids.