Mr. Field’s family has been ranching for more than 60 years in Alameda County on rangeland leased from the East Bay Regional Park District and the San Francisco Water Department. In 1990, the San Francisco Public Utilities Commission initiated planning for an end to grazing on their land due to concerns about water quality. In doing so they put Mr. Field’s ranch operation at risk, along with the ranches of 18 other families. A team of UCCE livestock farm advisors and specialists set out to research the impact of cattle grazing on water quality, and they developed a plan to address the PUC concerns. Not only did the novel UCCE plan convince the PUC to let Mr. Field and his fellow ranchers keep grazing their livestock on public lands; it received international attention and has become the basis for other grazing plans throughout the region.