Long-Term Control Plan
The Plan to Protect Seattle's Waterways
In 2012, 154 million gallons of untreated sewage and stormwater flowed into our lakes, creeks, and Puget Sound. Seattle Public Utilities is preparing a long-range plan that will create a comprehensive strategy to protect Seattle’s waterways reduce these Combined Sewer Overflows (CSOs).The plan:
- Identifies areas of Seattle where CSO reduction projects are required
- Evaluates solutions for reducing CSOs in affected areas
- Selects a preferred alternative for each affected area
- Recommends a schedule for designing and constructing projects (2016-2025)
Note: The Plan has changed based on community input and further technical analysis since the production of the Community Guide and video linked here. While some of the information has changed, these materials still provide a good general overview. Look for an updated Community Guide in June 2014.
Video overview of the Plan - Spring 2013
The Consent Decree
The plan describes how SPU will meet the requirements of the consent decree agreed to with federal regulators. This will enable the City of Seattle to comply with the Clean Water Act and state regulations, protect our waterways, and sustain our quality of life.
Glossary of Terms (pdf)