SEATTLE – Studies have shown it’s no easy task for juvenile salmon to make it through the Lake Washington basin to Puget Sound and one of the obstacles they must pass is the Hiram M. Chittenden Locks in Ballard. Although salmon have been navigating the 100-year-old Locks for as long as it’s been operating, studies in the 1990s indicated they were having a difficult time. The Lock’s primary passage routes were deep in the water column, not easily found by juvenile salmon which stay closer to the surface.