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For questions about the Conveyence System Improvement Program, please contact Mark Buscher 

Wastewater Treatment Division
King Street Center
201 S. Jackson St., Suite 505
Seattle, WA 98104-3855

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Initial CSI basin planning, 1999-2003 

North Lake Washington planning area

The North Lake Washington planning area covers the 16 sewer service basins in King and Snohomish Counties that are upstream of the Kenmore Interceptor Section 2 ("Kenmore Lakeline") and the York and Hollywood Pump Stations. Besides the County, nine cities and local sewer districts operate and maintain conveyance pipes and pump stations within this area. The County currently provides conveyance of local wastewater within this service area to either the West Point or South Treatment Plants; after 2010 some of these flows will go to the Brightwater Treatment Plant.

North Lake Washington Report, January 2004

North Creek Storage

North Creek Storage, Final Memorandum, December 1999 (268 KB)
This memorandum develops the design criteria for the North Creek Storage Facility located in close proximity to the North Creek Pump Station. The facility site is flat and located in the middle of the Quadrant Business Park near Interstate 405 in Bothell.

North End Pump Station Testing And Calibration, February 2001 (2.6 MB)
This study confirms flow data for the North Lake Washington and West Section pump stations; this project tested and field measured existing flow conditions for the pumps within the subject stations.

Sheridan Beach Reliability Project Alternative Analysis Report, March 2001 (2.1 MB)
A recommended set of solutions to increase the reliability of the Sheridan Beach Collection system is described in this report so that the likelihood of future flooding events would be greatly diminished or eliminated. A final phase report on odor control is also available by contacting the County if you wish a copy.

Alternative Uses of the Kenmore Parallel Lakeline, July 1999 (1.1 MB)
This report describes the existing Kenmore Interceptor Section 5 Lakeline location and purpose, discusses alternative alignments, compares alternative uses, and presents the range of planning level budgetary costs for each parallel alternative use. This was prepared as part of RWSP adoption deliberations in 1999.

Kenmore Interceptor and North Creek Storage Analysis, March 2001
This report includes a description of potential operational scenarios of the North Creek Storage Facility and structures and identifies the hydraulic limitations of the Kenmore Interceptor/Bothell Woodinville Interceptor under of variety of flow conditions.

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