Delta Conservancy Board

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Board Members

Mitch Mashburn, Chair
Supervisor, Solano County

Supervisor Mitch Mashburn represents the 5th District of Solano County, including the City of Rio Vista, Elmira, portions of the Cities of Fairfield, Suisun City and Vacaville, as well as the beautiful rolling hills of Eastern Solano County.

The 5th District is the proud home of thousands of airmen and civilian employees at Travis Air Force Base, hundreds of small farms, orchards and ranches, and a portion of the San Francisco Bay Delta – one of the largest estuaries on the west coast of North and South America, and the world’s only inland Delta.

Mitch’s life is rooted deep in the soil of Solano County and reflects a strong commitment to public service. The grandson of field workers and sharecroppers and son of a proud union electrical worker and Navy Veteran, Mitch is committed to creating new opportunities for another generation to succeed here.

A second-generation graduate of Armijo High School, Mitch spent his summers learning the value of hard while work cutting fruit in Suisun Valley. After an injury sidelined him from football at Solano College, Mitch found a new calling, working for the Solano County Sheriff’s Office as a Correctional Officer.

Prior to his retirement in December 2020, then-Facility Commander Lieutenant Mashburn directed the day-to-day operations of the jails, 300 staff and a seven-million-dollar budget, giving him unique insight into problems created by crime and homelessness. In recent years, Mitch directed construction of the Stanton Correctional Facility and the Roark Vocational Training Center, bringing in both projects on-time and under-budget with two of Solano County’s largest Project Labor Agreements to date.

Sparked by an interest in parks and youth programs, Mitch served as a Vacaville Planning Commissioner prior to his successful run for the Vacaville City Council in 2010. As a Councilmember and Vice Mayor for a decade, Mitch focused on neighborhood safety and creating new job opportunities. Even through an economic downturn, Mitch helped guide the adoption of balanced annual budgets totaling nearly $160 million, protecting taxpayers while maintaining Vacaville’s infrastructure, streets, and community parks.

A solution-oriented leader, Mitch is committed to tackling some of Solano County’s biggest challenges – homelessness, supporting our Veterans, preservation of the Delta, public safety, and balanced budgets in a post-COVID economy.

Mitch and his wife, Tonya, live in Vacaville with their three daughters, McKenzie, Olivia, and Brooklyn.

Leo Winternitz, Vice Chair
Appointed Public Member

Mr. Winternitz, now retired, previously worked for GEI Consultants Inc. as a senior project manager and served as the Co-Chair to the state and federal Collaborative Science and Adaptive Management Program upon 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.

Joe Stephenshaw
Director, California Department of Finance

Joe Stephenshaw was appointed as Director of the California Department of Finance by Governor Newsom in July of 2022. In this role, he serves as the Governor’s Chief Fiscal Policy Advisor. Prior to his appointment, Stephenshaw served in Governor Newsom’s Office as a Senior Counselor on Infrastructure and Fiscal Affairs.

Stephenshaw was Staff Director for the Senate Budget and Fiscal Review Committee from 2017 to 2022. He held multiple positions in the California Legislature from 2008 to 2017, including serving as a Policy Consultant in the Office of the Senate President pro Tempore, a Special Advisor to the Speaker of the Assembly, and as a Budget Consultant for both the Assembly Budget Committee and the Senate Budget and Fiscal Review Committee. Stephenshaw was a Budget Analyst for the California Department of Finance from 2005 to 2008.

Stephenshaw is a graduate of Menlo College with a bachelor’s degree in Business Administration. He also earned a Master of Business Administration degree from California State University, Sacramento.

Wade Crowfoot
Secretary, California Natural Resources Agency

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

As Secretary, Crowfoot oversees an agency of 19,000 employees charged with protecting and managing California’s diverse resources. This includes stewarding the state’s forests and natural lands, rivers and waterways, coast and ocean, fish and wildlife, and energy development. As a member of the Governor’s cabinet, he advises the Governor on natural resources and environmental issues.

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.

Prior to joining the foundation, Crowfoot served in Governor Jerry Brown’s Administration as deputy cabinet secretary and senior advisor to the Governor. In that role he led the administration’s drought response efforts and spearheaded several of the Governor’s priority initiatives to build California’s resilience to climate change. He previously served as West Coast regional director for the Environmental Defense Fund and a senior environmental advisor to then-San Francisco Mayor Gavin Newsom, where he helped to lead many of Mayor Newsom’s nationally-recognized environmental initiatives.

Crowfoot received a bachelor’s degree in political science from the University of Wisconsin-Madison in 1996 and earned a master’s degree in public policy from the London School of Economics in 2004, where he graduated with honors.

A native of Michigan, Crowfoot grew up spending his summers outdoors. Upon moving to California in the mid-1990s, he became an avid hiker and backpacker and marks his first hike in the redwoods as Big Basin State Park as one of his defining California moments. Now, he spends his down time camping and hiking with his wife, Lisa, and their young daughter.

Diane Burgis
Supervisor, Contra Costa County

Diane Burgis, of Oakley, serves on the Contra Costa County Board of Supervisors, representing the 230,000 residents of District 3. Her district includes a majority of Contra Costa County’s Delta region, and the communities of Antioch, Bethel Island, Brentwood, Byron, Discovery Bay, Knightsen, and Oakley in East Contra Costa County. Prior to being elected to the Contra Costa County Board of Supervisors in 2016, she served as a trustee on the East Bay Regional Parks District Board and as a member of the Oakley City Council.

Supervisor Burgis was named the California State Assembly’s 2012 Woman of the Year for District 15 for her work as Executive Director of Friends of Marsh Creek Watershed, and she received the Contra Costa County Commission on Women’s 2016 Women Empowering the Environment Award.

Steven J. Ding
Supervisor, San Joaquin County

Steve is a small business owner, community leader, and father.

Steve learned from a young age that nothing comes without hard work. Growing up, he worked after school at his parents’ store in Stockton. Working there sparked his entrepreneurial spirit, and before long he was delivering the Record on his own paper route and bussing tables in his “free time”. He liked paying his own way. He still does. And he appreciates the value of a dollar, his or yours.

After graduating from Stagg High School, Steve attended San Joaquin Delta College, and then transferred to Chico State, where he worked for a local nightclub as a doorman. During the day he listened to the local business owners complain about unfair treatment by the local city council. Looking into it, Steve thought they were right, and organized students to replace four of the council people with small business owners.

Steve realized that he liked politics, and dove in. He commuted back to Stockton to work for a local Supervisor, and after graduating took a job for Congressman Richard Pombo where he rose to the position of Chief of Staff and Staff Director of the powerful Resources Committee, which oversaw the federal water resources that are vital for our community. He knows the ins and outs of government – but more important knows that government should be there to do the basic jobs we pay them to do… that government works for us, we don’t work for them.

In 2010 Steve bought the historic Woodbridge Crossing restaurant in 2010 and worked hard on his own dime to restore it and keep it a local tradition. The restaurant flourished and won awards for excellence, in part because Steve made it his business to meet customers, find out what they liked and didn’t, and learn from his mistakes. He’s not afraid to admit when he’s wrong, and he doesn’t hesitate to step up and fix problems.

Steve serves on the Executive Board of the Lodi Boys & Girls Club and is a member of the Greater Stockton Chamber of Commerce, Lodi Chamber of Commerce, and The California Restaurant Association. Steve was named Businessman of the Year both locally and by the California State Senate for his service to the local community. He is blessed to work at Woodbridge Crossing with his two sons, Steven Jr. and Connor, every day of the week.

In November 2022, Steve was elected to the San Joaquin County Board of Supervisors, District 4.

Pat Hume
Supervisor, Sacramento County

Pat comes to the Board of Supervisors following 16 years on the Elk Grove City Council. His longstanding devotion to serving his community was inherited. Pat hails from a long line of public servants.

His father served in the US Air Force and died in the line of duty when Pat was still young. Pat’s grandfather Harry Hume was City Manager in Chico from 1930-1950 and his mother’s family has had a strong presence in Sacramento County for over half a century. His grandfather Jim Guttridge served on the EGUSD School Board for over two decades and was a charter member of the Rotary Club of Elk Grove

Pat grew up in Elk Grove and attended Kerr Middle School and Jesuit High School before receiving his Bachelor’s Degree from San Diego State University. He also holds a Master’s Degree in Ethical Leadership from Claremont Lincoln University. After college, Pat moved back home to Sacramento County to help the family business following his grandfather’s death in 1998.

Pat served on the City of Elk Grove Planning Commission from incorporation in 2000 until he was elected to the City Council in 2006; he went on to serve three additional terms as a Council Member. Through his work on regional boards, including Regional Transit, Capital Southeast Connector Joint Powers Authority and LAFCO (Local Agency Formation Commission), Pat gained deep expertise on transportation and land use issues.

In 2022, Pat was elected to the Sacramento County Board of Supervisors to represent District 5, which includes the cities of Elk Grove, Galt, Isleton and Rancho Cordova, as well as rural farming areas and communities in the southern portion of Sacramento County and the Delta.

As the District 5 Supervisor, Pat currently serves on several Boards and Commissions, including: the Area 4 Agency on Aging Governing Board, the Capital Southeast Connector Authority, the County Leadership Advisory Committee, the Delta Protection Commission, the Freeport Regional Water Authority, the Lower American River Conservancy Program Advisory Committee, the Sacramento Area Flood Control Agency (SAFCA), the Sacramento Area Sewer District (SASD), the Sacramento Central Groundwater Authority, the Sacramento County Water Agency, the Sacramento County Water Financing Agency, the Sacramento Metropolitan Air Quality Management District Board of Directors, the Sacramento Metropolitan Cable Television Commission, the Sacramento-Placerville Transportation Corridor JPA, the Sacramento Public Library Authority Governing Board, the Sacramento Regional County Sanitation District (SRCSD), the Sacramento Regional Transit District, the Sacramento Transportation Authority (STA)/Sacramento Abandoned Vehicle Service Authority (SAVSA), the Sacramento Valley Basinwide Air Pollution Control Council, the Sacramento-San Joaquin Delta Conservancy, and the South Sacramento Conservation Agency Joint Powers Authority.

Pat and his wife Lisa are active in​ the community and enjoy traveling and spending time with their dog, Diego. Pat also volunteers his time to serve as an auctioneer for many local non-profits as a way of helping others do their good work.

Sandi Matsumoto
Appointed Public Member

Sandi Matsumoto was appointed by the Governor to serve on the Delta 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.

Jim Provenza
Supervisor, 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.

Lilliana Udang
Appointed Public Member

Born and raised in Stockton, California, in the heart of San Joaquin County, Lilliana has dedicated her professional career to serving the community that raised her. After graduating from Lincoln High School in 2007, Lilliana attended San Joaquin Delta College for two years before transferring to the University of California, Santa Cruz where she earned her Bachelor’s Degree in History in 2011.

Her desire to help better her community prompted Lilliana to make the decision to apply to law school. Lilliana graduated from University of the Pacific, McGeorge School of Law with her JD in 2017. While attending law school, Lilliana discovered a passion for policy work and interned in then-Assemblymember Susan Talamantes Eggman’s office during her 2L summer. In her third year at McGeorge, Lilliana participated in the law school’s Legislative and Public Policy clinic, where she led her team in passing AB 413 (Eggman), which was signed into law by Governor Jerry Brown on September 1, 2017. AB 413 (Eggman) allows survivors of domestic violence to record their abuse and submit those recordings as evidence in a court proceeding without fear of being sued by the abusive party for invasion of privacy.

After graduating from McGeorge, Lilliana began working in the California State Assembly, where she started her career as a legislative aide for Assemblymember Eggman serving the 13th Assembly District cities of Mountain House, Tracy, and Stockton. Lilliana began working in the California State Senate in 2020 for State Senator Eggman, where she was promoted to District Director and continues to serve the 5th Senate District today, which includes all of San Joaquin County and portions of Stanislaus and Sacramento Counties. She continues to work on legislation in her capacity as District Director with a focus on domestic violence prevention, recycling, and local water issues.

Lilliana has served on the Delta Protection Commission since 2020 as an alternate to Ex-Officio Member Senator Eggman. She was appointed to the Delta Conservancy as a Board Member in January 2023.

Appointed Public Member

This position is currently vacant.

Ex-Officio Members

Senator Bill Dodd
State Senate District 3

Assemblymember Timothy Grayson
State Assembly District 15

Liaison Advisors

Bruce Blodgett
Delta Protection Commission

Steve Chappell
Suisun Resource Conservation District

Jessica Davenport
California Coastal Conservancy

Jessica Fain
San Francisco Bay Conservation and Development Commission

Marge Kolar
Yolo Basin Foundation

Maria Rea
U.S. National Marine Fisheries Service

Paul Souza
U.S. Fish and Wildlife Service

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

Michael Villines
Central Valley Flood Protection Board

Brooke White
U.S. Bureau of Reclamation, Mid Pacific Region