Dr. Zan Rubin worked with Balance from 2005-2008 and again since 2015. He has designed and implemented investigations of complex hydrogeologic, geomorphic, bed-sedimentation, water-quality, and sediment-quality questions in streams, lakes, and wetlands in the working landscapes of the California and throughout the world. Zan has conducted many of the firm’s water quality studies, including multi-year TMDL sediment-transport and bed-condition investigations on San Francisquito Creek and other channels near Stanford University, and throughout Santa Cruz, San Mateo, and Santa Clara Counties. He has also led countywide investigations of water quality in San Mateo and Santa Clara Counties. For the Callippe Preserve Golf Course he designed and implemented a water quality and ‘nuisance flow’ management strategy. On the lower Colorado River, Zan investigated restoration potential in areas of limited water quality, habitat quality, and riparian areas with elevated soil salinity. Internationally, he has been part of a team supporting the national governments of Cambodia, Laos, and Vietnam to model sediment trapping from future hydropower development, to identify projects with the greatest impacts, and to propose dams with alternative sites, designs, and management strategies to minimize sediment trapping, barriers to fish migration, flood risk, and displacement of people.