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, Treasurer
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.


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.


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.


John Kreiter
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.


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.


Cecily Majerus
Cecily is a former Executive Director of the Tuolumne River Trust and has served as an Advisor since 2003. She also formerly served on the Board or Directors and returned to this role in January 2012. Before moving to California, Cecily lived in Maryland and was their Governor’s Coordinator for the Chesapeake Bay and is the former Chair of the Ocean Conservancy.


Len Materman
Len joined the Trust Board in 2007. He is the Executive Director of the San Francisquito Creek Joint Powers Authority, a regional government agency located in Silicon Valley. Len also founded America’s River Communities, Inc., which has helped a dozen state and several foreign governments simultaneously advance their environmental and economic development interests, and for which Len produced a film broadcast nationally on PBS on the Clean Water Act. He has worked at Stanford University and UC Berkeley, and served as a consultant to nonprofits, foundations, and the U.S. State Department. During the Clinton Administration, he served on two White House Task Forces of the Council of Environmental Quality.


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.


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.