About the Delta Conservancy Board

Board Chair

Katherine Miller, San Joaquin County

Kathy Miller was elected to the Board of Supervisors in June 2014 and served as Board Chair in 2015. Previously, she served on the Stockton City Council 2009 – 2014, and as Vice Mayor 2009 – 2012.  She currently represents San Joaquin County in many capacities, including San Joaquin General Hospital, the Homelessness Task Force, the Children & Youth Task Force, San Joaquin County Employees Retirement Association and as Chair of the San Joaquin Council of Governments.

Kathy continues her leadership on regional water issues with the Five Delta Counties Coalition, San Joaquin Delta Coalition, and as Chair of both the San Joaquin Area Flood Control Agency and the Sacramento-San Joaquin Delta Conservancy.  In addition, she previously held leadership positions on the Northeastern San Joaquin County Groundwater Banking Authority and rose to the rank of Second Vice President of the state-wide League of California Cities. Kathy Miller and her husband, Karl, have been married 40 years, have three grown children and two grandchildren.

Organization: Supervisor, San Joaquin County


Board Vice Chair

Dolores “Dolly” Sandoval, Public Member

Dolly Sandoval was appointed by the Governor to serve on the Conservancy Board. Sandoval currently serves as Vice-Chair of the Valley Transportation Authority (VTA) Board of Directors and as a Board member of West Valley Community Services. She served two terms on the Cupertino City Council, 1996-2004 and three terms on the Foothill-DeAnza College Board in 1992-2004. She has served on the VTA Policy Advisory Committee, the VTA Citizens Advisory Committee, and on the Board of Directors for the Foothill-DeAnza Colleges Foundation, Council on Higher Education Accreditation and Friends of the River. She is a graduate of University of California, Santa Cruz and the Leadership Development Program of Mexican-American Legal Defense & Education Fund. She also leads whitewater rafting trips as a volunteer guide for Friends of the River. She currently works as a high school math teacher.


Board Members

Keely Martin Bosler, Department of Finance

Keely Martin Bosler was appointed as Director of the California Department of Finance by Governor Edmund G. Brown Jr. in August 2018 and reappointed by Governor Gavin Newsom in December 2018. She serves as the Governor’s chief fiscal policy advisor. Prior to her appointment, she served as Cabinet Secretary for Governor Edmund G. Brown, Jr. from 2016 to 2018. Director Bosler previously served as Chief Deputy Director for Budget at the Department of Finance from 2013 to 2016.

Bosler was Staff Director for the California State Senate Budget and Fiscal Review Committee from 2010 to 2013, where she was a consultant from 2004 to 2009. She also served as Associate Director for fiscal services over the California Department of Corrections and Rehabilitation’s Budget Management Branch from 2009 to 2010. She started her career at the California Legislative Analyst’s Office, where she served as a Fiscal and Policy Analyst from 2000 to 2004.

Bosler is a graduate of California State University, Chico with a bachelor’s degree in Agricultural Business. She also holds a master’s degree in Applied Economics from Cornell University.

Organization: Director, Department of Finance

Wade Crowfoot, Natural Resources Agency

Wade Crowfoot was appointed California Secretary for Natural Resources by Governor Gavin Newsom in January 2019.

Crowfoot believes effective management of California’s resources allows communities and natural places to thrive and the economy to grow. This includes strengthening the connection between Californians and natural resources by expanding access to parks and natural places. Crowfoot is also prioritizing building California’s resilience to growing challenges from climate-driven threats, including drought, wildfire, flooding and sea-level rise.

Crowfoot brings over two decades of public policy and environmental leadership to the office, with expertise in water, fisheries, climate and sustainability issues. He most recently served as chief executive officer of the Water Foundation, a nonprofit philanthropy that builds shared water solutions for communities, economy, and the environment across the American West. In that role, he developed innovative partnerships among a broad range of partners including agricultural leaders and environmental conservation groups.  To view Secretary Crowfoot’s full biography, click here.

Organization: Secretary for Natural Resources

Sandi Matsumoto, Public Member

Sandi Matsumoto was appointed by the Governor to serve on the Conservancy Board. Ms. Matsumoto has been associate director for the California Water Program at the Nature Conservancy since 2015, where she was project director from 2004 to 2015. She was project manager at the Los Angeles Community Design Center from 2003 to 2004 and a project analyst at Mintz Levin from 1997 to 1999. She is a member of the Groundwater Resources Association. Ms. Matsumoto earned a Master of Business Administration degree in finance from the University of California, Los Angeles Anderson School of Management.

Karen Mitchoff, Contra Costa County

Supervisor Karen Mitchoff was sworn in as Contra Costa County District IV Supervisor in January of 2011. She began her service to the County in the office of former Sherriff-Coroner Richard Rainey. She also worked as a fiscal and administrative analyst for the county’s Employment and Human Services Department, and as Chief of Staff for former Supervisors Sunne Wright McPeak and Mark DeSaulnier. Supervisor Mitchoff served on the Pleasant Hill City Council from 2008 to 2010, and as Mayor in 2010. Supervisor Mitchoff was appointed to the Pleasant Hill Recreation and Park District Board of Directors in 2003 and was elected to that Board in 2004 and 2006. She served as Chair in 2005 and 2006, and served on a variety of committees during her tenure there. Supervisor Mitchoff was appointed to the Pleasant Hill Citizens’ Advisory Committee on Redevelopment in 1988, and also served on the Planning Commission from 1992-1996.

Organization: Supervisor, Contra Costa County

Don Nottoli, Sacramento County

Currently serving his fifth term, Don was first elected to the Sacramento County Board of Supervisors in November 1994. Prior to his election, Don served as chief assistant to former Fifth District County Supervisor Toby Johnson for 16 years. Don and his wife Brenda are lifelong residents of Sacramento County, and make their home in the community of Galt. Don is a former member of the Galt City Council and served for more than 17 years as a board member with the Galt High School District Board of Trustees. Both Don graduated from California State University, Sacramento, earning a Bachelor of Arts degree in Government/Journalism. Don is active on many boards including the Delta Protection Commission, Delta Stewardship Council, Sacramento Area Flood Control Agency, and Freeport Regional Water Authority.

Organization: Supervisor, Sacramento County

Jim Provenza, Yolo County

Jim Provenza first entered public office in 2003 as a Member of the Davis Joint Unified Board of Education, where he served as President of the Board of Education from 2006-2007. Jim’s priorities are to preserve and protect open space and farm land in Yolo County, to promote services for seniors, children, crime victims, and the disabled, and to insure that Yolo County is able to provide essential law enforcement services and public safety protection. He has 29 years of county and state government experience, and a long career in public interest law. For the past 15 years, Jim worked as a special assistant district attorney.

Organization: Supervisor, Yolo County

Skip Thomson, Solano County

Supervisor Thomson graduated from Fairfield High School and received an A.A. degree from Solano Community College.  Later, he received a B.A. in International Relations with a minor in Spanish from University of California, Davis.  Supervisor Thomson served in the U.S. Army and is married to his high school sweetheart, Gail. They have two sons, Brandon and Loren.  Brandon works at the Solano Transportation Authority and Loren completed a tour of duty in Iraq with the California Infantry National Guard.  Loren is a deputy sheriff for the Solano County Sheriff’s Department.

Supervisor Thomson believes that the Delta is crucial to the livelihood of our rural, agricultural and urban communities.  To view Supervisor Thomson’s full biography, click here.

Organization: Supervisor, Solano County

Leo Winternitz, Public Member

Mr. Winternitz currently works for GEI Consultants Inc. as a senior project manager and has most recently served as the Co-Chair to the state and federal Collaborative Science and Adaptive Management Program since its establishment in 2013.

Prior to joining GEI, Mr. Winternitz held several positions in the California water resources arena, most recently, as Delta Program Director and Senior Advisor for The Nature Conservancy. Prior to this, Mr. Winternitz served as Deputy Director for the CALFED Bay-Delta Program, which focused on water and environmental management activities in the Sacramento-San Joaquin region. He also served as the Executive Director for the Sacramento Water Forum a diverse group of 40 stakeholder organizations representing business, agriculture, citizens’ groups, environmentalists and water managers who have collaboratively negotiated a regional water supply and environmental protection agreement for the American River watershed to the year 2030. Mr. Winternitz has also served in public office as a director and past-President of the Arcade Water District, and is currently on the board, and has served as president to the American River Parkway Foundation.

Board Non-Voting Members

Senator Bill Dodd

State Senate, District 3

Assemblymember Jim Frazier

State Assembly, District 11


Board Liason Advisors

Russell Callejo

Mid Pacific Region, U.S. Bureau of Reclamation

Steve Chappell

Suisun Resource Conservation District

Matt Gerhart

California Coastal Conservancy

Steve Goldbeck

San Francisco Bay Conservation and Development Commission

Martha Ozonoff

Yolo Basin Foundation

Maria Rea

National Marine Fisheries Service

Paul Souza

U.S. Fish and Wildlife Service

Stu Townsley

South Pacific Division, U.S. Army Corps of Engineers

Michael Villines

Central Valley Flood Protection Board

Erik Vink

Delta Protection Commission

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