Spawning bass are attracted to structures protruding from the substrate, but it is unknown which pier features attract foraging bass. Circumstantial evidence suggests that the amount of shade or the area of overhead coverage provided by a structure is important to foraging bass. Investigations of bass utilization of structures of various designs are necessary. Until investigations of prisms and grating are complete, they should not be relied upon as a mitigation measure that reduces bass attraction. Finally, the summer boating season corresponds with the highest water levels in Lake Washington.
Erosion caused by power boating can be severe.
The high water levels that occur during the periods of heaviest boat use increase the potential of boat wake-induced erosion damage around the lake. Efforts to restore natural shorelines in Lake Washington will be hindered by artificially maintaining a high summer lake-level. The ecological implications of the continuation of the existing water-level management regime in Lake Washington should be critically examined. There are a number of ongoing studies within the Lake Washington system from which results will be available to the public in the near future. Muckleshoot Indian Tribe.