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The Delta Lead Scientist

The Delta Lead Scientist oversees the Delta Science Program and is an employee of the U.S. Geological Survey. The Delta Lead Scientist consults regularly with partner agencies, the Deputy Executive Officer for Science, the Delta Stewardship Council’s Executive Officer, and the Delta Stewardship Council.



Current Delta Lead Scientist


Dr. John Callaway, an internationally recognized expert in wetland restoration, specifically wetland plant ecology and sediment dynamics, was unanimously appointed by the Council as Lead Scientist at the July 2017 meeting. Most recently, Dr. Callaway has served as the director of the Master’s Program in Environmental Management at the University of San Francisco. “I look forward to the continuing efforts of building a collaborative scientific community with its search for common truths on the many critical issues that face the Delta,” Dr. Callaway said. “The development of One Delta, One Science is clearly a project of critical importance to California that is helping set standards of how the best available science can more effectively inform the making of policy.” Read more



Previous Lead Scientists


Dr. Cliff Dahm
2008-2012 &
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Dr. Peter Goodwin


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Dr. Michael Healy



Dr. Johnnie Moore



Dr. Sam Luoma




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)