We are developing management models to assist cost-effective decisions about maintenance and decommissioning of logging roads in California's redwood region. Control of sediment from roads is key to protecting streams and their endangered salmonids. Data collection and research in Caspar Creek for the past 40 years provide a wealth of knowledge about hydrological function and sediment delivery in the watershed. This knowledge is the basis for our operations research models to address road management questions, such as whether aquatic habitat is more effectively protected through several levels of road maintenance (which implies annual costs and ongoing sediment delivery) or road decommissioning (which implies greater up-front costs and short-term increased sediment delivery, but less of each in the future). These models explore the management implications of ongoing erosion, stochastic slope failures, and option values such as the ability to use roads for fire control and other management activities. Our goal is to develop a set of decision tools useful to both public and private land managers who want to achieve cost-effective reduction of sediment delivery from roads to streams.