Tuolumne River Trust Board of Directors

The following are the current members of our Board of Directors

John Nimmons, Chair
John is an attorney and consultant specializing in energy law, policy, planning, and development strategies for sustainable energy resources, focusing on renewable resources, combined heat and power, district energy, fuel cells, emerging technologies, and energy options available to public entities. He has been a Trust advisor since 2004 and has served on the Board since 2006. John is a former Director of the Earl Warren Legal Institute Energy Studies Group (U.C. Berkeley) and San Francisco Planning and Urban Research Association Energy Task Force and a former Board member of the Pacific Energy and Resources Center.

Harrison “Hap” Dunning, Vice Chair
Hap is a Professor of Law Emeritus at the School of Law, University of California at Davis. Before his retirement, he taught and published extensively in the fields of environmental law and natural resources law, with a particular emphasis upon water law. In 1977-78, he took a leave from the law school to head the staff of The Governor’s Commission to Review California Water Rights Law. In 1981-82, he chaired the committee supporting an initiative on water law reform which appeared on the California ballot in November 1982. Hap became a TRT advisor in 2002 and a member of the board in 2008.

Camille King, Secretary
Camille joined the Tuolumne River Trust Board in 2013 after having been involved as a member and volunteer for many years. She is a former CFO and enrolled agent and has been involved with many environmental groups in the Bay Area.

John Kreiter, Treasurer
John and his wife, Kyle, have a home at Lake Don Pedro above La Grange Dam. They are enthusiastic supporters of the Tuolumne and its watershed, as well as kayakers. Recently retired from a 38-year career at Clorox, John looks forward to working with the Trust to protect and restore the salmon population in a healthy river with higher flows throughout the year. He joined as an advisor in 2015 and was elected to the board in 2016. John is also on the board of the Alameda County Food Bank.

Eric Heitz, Chair Emeritus
Eric fell in love with rivers, and met his wife Brenda, while training as a river guide with Echo Rafting. He currently works in the environmental field as the President of the Energy Foundation, which advances clean energy technologies. He has two daughters, who are almost ready to float the Tuolumne . He has served on the Board since 1996, and was Board Chair from 2001-2009.

Susan Stern, Immediate Past Chair
Susan came to know and love the Tuolumne in Tuolumne Meadows and on its Middle Fork at Camp Tawonga. After her children spent many summers at Tawonga, Susan served as President of the Tawonga Board which worked closely with the Tuolumne River Trust on environmental issues in the Tuolumne watershed . She joined the TRT Board in the mid-1990’s and served as Chair during 2010 and 2011.  Susan enjoys working as an ambassador for the Trust and advancing the mission of the Trust through board development and fund raising.

Cindy Charles
Cindy Charles is an avid fly angler and has been active in fisheries conservation work within California the past 20 years. She is the long-time Conservation Chair for the Golden West Women Flyfishers, and was the first woman to receive the National Conservation Award from the Federation of Fly Fishers in 2007. Cindy is retired from a 20 plus year career in finance and resides in San Francisco and Groveland. She knows the Tuolumne intimately and has been involved in many multi-year issues on the Tuolumne ranging from the FERC regulation of the New Don Pedro Dam as well as the State Water Board’s Bay Delta Plan.

Eddie Corwin
Eddie works at Google on health and sustainability best practices for their global offices, providing a platform to track energy, water, waste, indoor air quality, etc. Growing up in San Francisco, he is familiar with the Tuolumne and the Sierra ecosystems. His passion for California and the environment have led to creative problem-solving partnerships. We welcome Eddie as our newest member of the board!

Kerstyn Crumb
Kerstyn is an attorney whose skills in synthesizing scientific and legal information can be translated to TRT’s work on water usage and clean water issues. She grew up at the confluence of two great rivers – the Potomac and Shenandoah – with a lifelong appreciation of wild places and biological diversity. She hopes to use her advocacy and negotiation skills to promote TRT’s mission. She learned of the work of TRT while meeting with staff and board members at the Silicon Valley Board Match.

Bob Hackamack, P.E.
Bob has served on the Trust’s Board in vairous roles since its inception in 1981. He is a retired Chemical Engineer and Control Systems Engineer. Hackamack is also involved with the following organizations: Friends of the Tuolumne , Sierra Club, Restore Hetch Hetchy, Past Chair of the Sierra Club Tuolumne River Conference Task Force 1969-1995, and Hetch Hetchy Restoration Task Force 1987 to present.

Bill Maher
Bill is an active environmentalist and rafter. He was a member of the San Francisco Board of Supervisors for 12 years and chaired Public Works which dealt with traffic and the environment for 8 of those years. Bill authored the Toxins Bill, the Sunlight in the Park bill, the demolition of the Embarcadero and Central freeways among others and authored or co-authored virtually every San Francisco piece of water and energy conservation legislation from 1982 until 1995. He is a past president of the SF Board of Education and served as the Executive Director of the SF Department of Parking and Traffic. Bill has been an advisor to the Trust since 2004.

Len Materman
In the Spring of 2020, Len was appointed the first CEO of the San Mateo County Flood and Sea Level Rise Resiliency District, the first countywide independent government agency in California focused on these climate change impacts.  Len also serves as Public Policy Practitioner in Residence at Stanford University’s Center for the American West, and he is a contributing author on two recent books on climate change. Previously, Len served as the Executive Director of the San Francisquito Creek Joint Powers Authority (SFCJPA), where he led the largest completed multi-jurisdictional sea level rise protection effort in the state, for which the SFCJPA won numerous awards and has been highlighted as a model of regional collaboration in the Wall Street JournalLos Angeles Times, and other major media. Prior to leading the SFCJPA, Len served as UC Berkeley’s Director of Government Affairs; as a consultant to nonprofits, foundations and the U.S. State Department; and as executive producer of a film on water broadcast nationally on PBS. During the Clinton Administration, Len served as a policy advisor to the Director of FEMA and as FEMA’s representative on two White House Task Forces. He has degrees in Political Science and Biology from UC Davis.

Marty McDonnell
Marty, owner of Sierra Mac River Trips in Sonora, has spent many years navigating the Tuolumne rapids and guiding people down challenging whitewater courses. He is involved with the Clavey River Preservation Coalition and is a founding member of the Tuolumne River Trust. He has served on the board since 1981.

Eric Riemer
Eric has served in finance leadership roles at mission-driven organizations throughout his career, and is currently a finance consultant at Kaiser Permanente.  A lifelong outdoor enthusiast, he recently earned a certificate degree in Environmental Policy from Harvard University’s Extension School in order to deepen his understanding of our most pressing environmental challenges. In his free time Eric can usually be found on a trail somewhere, exploring California’s many natural wonders with friends and family.  He serves on the Development and Finance committees at the Trust.

Sue Ellen Ritchey
Sue Ellen is a civic leader in the Modesto community. Professionally, she teaches high school students. She is also a member of the Modesto Symphony Board and past Secretary, as well as a member of the Board of Trustees of the Gallo Center for the Arts.

Bart Westcott
Bart is a retired insurance executive and long time “advocate for the natural world.” He and his wife, Nancy, have been TRT supporters and enjoy bringing folks together around TRT’s mission. He looks forward to supporting and advancing the work of the Trust using his skills in finance, risk management, and communication. Bart is currently on the Board of Grassroots Ecology and Shall We Dance and served on Acterra’s board from 2003 – 2013.