DAYTON, Wash. – Significant river debris caused by unusually high Snake River flows damaged vertical barrier fish screens (VBS) in Little Goose Lock and Dam’s juvenile bypass system (JBS). Several damaged VBS screens entrapped juvenile steelhead and salmon between the VBS mesh and metal “porosity plates,” which control the flow of water.” Debris damage caused 1,800 juvenile fish to perish as they were exposed to excessively turbulent water conditions. Of those 1,800 fish lost, 1,438 were hatchery steelhead. About 10 million juvenile fish migrate downstream this time of year at Little Goose.