CONTENTS Introduction Intensively Monitored Watersheds Smolt/Adult Monitoring Skagit River Lake Washington Green River Deschutes Hood Canal Dungeness Grays Harbor Lower Columbia River Wenatchee River Trapping Gear Publications Data Salmonscape

Smolt/Adult Monitoring: Lake Washington [Cedar River] [Big Bear Creek] Lake Washington: Cedar River Location: Tributary to Lake Washington; scoop trap at the mouth of the Cedar River, near Renton; screw trap at R.M. 1.0, below the Logan Street Bridge. History: In 1992, with funding from King County, WDFW began evaluating wild and hatchery sockeye fry production from the Cedar River into Lake Washington.  In 1999, the project was expanded to quantify production of other species, including chinook, coho, steelhead and cutthroat.  Since 2001, Seattle Public Utilities has provided funding for a portion of trap operation costs. In 1994, WDFW began a project to assess downstream migrant salmonid passage through the Ballard Locks.  With the cooperation of the the US Army Corps of Engineers (USACE), the Muckleshoot Tribe and National Marine Fisheries (NMFS), a multi-agency research team studied smolt passage through the Locks.  As a result, significant changes were made to operations and facilities. In 2001, in cooperation with the USACE, a portion of the chinook and coho smolts were implanted with Passive Integrated Transponder (PIT) tags to evaluate the timing and survival of out-migrants through Lake Washington and the Ballard Locks. Methods: A scoop trap is operated to monitor sockeye and chinook fry production.  While sockeye are easily captured, such larger migrants as coho, steelhead and cutthroat smolts, which prey upon sockeye, are able to avoid the trap in the water velocities in which it is operated.  Beginning in 1999, added a screw trap to capture the later-timed and larger chinook, coho, steelhead and cutthroat smolts. Available Publications: 1997 Cedar River Sockeye Salmon Fry Production Evaluation 1998 Cedar River Sockeye Salmon Fry Production Evaluation 1999 Cedar River Sockeye Salmon Fry Production Evaluation 2000 Cedar River Sockeye Salmon Fry Production Evaluation Evaluation of Downstream Migrant Salmon Production in 1999 and 2000 from three Lake Washington Tributaries: Cedar River, Bear Creek, and Issaquah Creek Evaluation of Downstream Migrant Salmon Production in 2001 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2002 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2003 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2004 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2005 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2006 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2007 from the Cedar River and Bear Creek Lake Washington: Big Bear Creek Location: Tributary to Lake Sammamish; River mile 1.0, near Redmond, Washington. History: In 1997 and 1998, WDFW operated a downstream migrant trap in the Sammamish Slough at Bothell to estimate the contribution of Sammamish River sockeye to Lake Washington production.  While this operation was successful in estimating sockeye fry production, velocities in the Sammamish were too low to capture larger migrant species.  Big Bear Creek is the most heavily spawned tributary in the Sammamish watershed.  It also has sufficient flow characteristics to support trapping larger migrants.  With funding support from King County, WDFW has operated downstream migrant traps in Bear Creek since 1999. Available Publications: 1997 Sammamish River Sockeye Salmon Fry Production Evaluation 1998 Sammamish River Sockeye Salmon Fry Production Evaluation Evaluation of Downstream Migrant Salmon Production in 1999 and 2000 from three Lake Washington Tributaries: Cedar River, Bear Creek, and Issaquah Creek Evaluation of Downstream Migrant Salmon Production in 2001 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2002 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2003 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2004 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2005 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2006 from the Cedar River and Bear Creek Evaluation of Downstream Migrant Salmon Production in 2007 from the Cedar River and Bear Creek