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Culvert replacement and possible upstream realignment and re-grading

Zaccuse Creek is an eastern-shore tributary to Lake Sammamish whose watershed lies within the boundaries of the City of Sammamish.  Historically it supported kokanee spawning, but due to modifications to the stream channel kokanee access is limited to approximately the final 100 feet of stream before it reaches the lake.  This portion of the stream contains little or no habitat suitable for kokanee spawning, but in the last several years hundreds of adult kokanee have been observed in the creek during the fall spawning run. 

The Kokanee Work Group has prioritized the restoration of access for kokanee to the upper reaches of the stream for near term action.  This restoration effort will likely involve the retrofitting or replacement of up to three culverts that affect or could affect kokanee passage under certain stream flow conditions.  This report was produced during the spring of June 2012 to help provide the foundation for the planning, design, and implementation of these restoration activities on Zaccuse Creek.  The report was commissioned by Wally Pereyra, the landowner immediately upstream of culvert under the East Lake Sammamish Parkway, as an element of his effort to restore habitat conditions that support kokanee recovery.  The report was developed by R2 Resource Consultants, Inc.

Design guidance for Zacuse Creek projects is provided in Adobe Acrobat format. For help using Acrobat, please visit our Acrobat help page.

Download here:

For questions about Lake Sammamish kokanee and related documents, please contact David St. John, government relations administrator, DNRP Director’s Office.