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Adult Sockeye Salmon at the Hiram Chittenden Locks
This graph is based on numbers generated from counts of sockeye moving through the Hiram Chittenden (Ballard) Locks in the Lake Washington Ship Canal. Counts of sockeye were made by the Washington Department of Fish and Wildlife and are now made by the Muckleshoot Indian Tribe. The counts are made of sockeye moving through the fish ladder and through the ship locks. The counts are then used to estimate the number of sockeye moving from marine water into Lake Washington.
The spawning goal for sockeye in the Lake Washington system is 350,000 sockeye. Sockeye fisheries are not opened unless the number of returning sockeye is expected to exceed the spawning goal. The number of sockeye returning to Lake Washington depends on the number of young fish that left Lake Washington two and three years previous, and marine survival. Most sockeye returning to Lake Washington spawn in the Cedar River. Some spawn along the shores of Lake Washington, and in other tributaries such as Bear Creek, and Issaquah Creek.
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