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DLIS Decision Support Tool


The DLIS Decision Support Tool is an online interactive tool that organizes and displays information and analysis related to Delta Stewardship Council activities to identify priorities for State investment in maintenance and improvement of levees in the Delta and Suisun Marsh.


The tool allows users to see and review the assets, risks, and priorities regarding State interests in protecting lives, property, water supply, ecosystem restoration, and other considerations about the Delta as a unique and evolving place. Later in the tool, you can set your own priorities among State interests to see how your values might change levee investments. Version 1.1, September 2016, includes updated information on Delta assets and probabilities of flooding due to seismic events. The boundaries of several islands and tracts have been adjusted in response to comments from local flood managers and levee engineers.


The link below will take you to the online tool, which begins with instructions. This is a large program that will take some time to load on your computer. Please note that the tool will time out and reset after several minutes of inactivity. Once in the tool, move your mouse and review the content continuously to avoid the timeout disruption.


Please note also that the public version of this tool is hosted on the website of the software developer, Tableau. Clicking on any of the links on the top blue Tableau Public bar will take you to the software firm website, which is unrelated to the Delta Stewardship Council and to the Delta Levees Investment Strategy.


If you have comments or corrections about the assets, risks, and priorities displayed in the tool, please contact the project team at


Link to the public version of the DLIS decision support tool:

Coequal goals

The Delta Stewardship Council was created in legislation to achieve the state mandated coequal goals for the Delta. "'Coequal goals' means the two goals of providing a more reliable water supply for California and protecting, restoring, and enhancing the Delta ecosystem. The coequal goals shall be achieved in a manner that protects and enhances the unique cultural, recreational, natural resource, and agricultural values of the Delta as an evolving place." (CA Water Code §85054)