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King County has been working to control CSOs since 1979. The final projects are expected to be completed by 2030. These projects have been prioritized to protect public health, beginning with construction of the CSO control projects along Puget Sound Beaches and projects along the Duwamish River. The final phase of projects focuses on the Lake Washington Ship Canal and the East Duwamish Waterway.

Janice Johnson
CSO Control Program