The water supply for the southern half of inland Mendocino County is dependent on water from the Russian River. The West Fork begins on Tomki Road in Redwood Valley. … For well over 100 years, the water flows of the Russian River have been supplemented from water diverted from the Eel River via the Potter Valley Project (PVP). … All of that is about to drastically change, and possibly end, as Pacific Gas and Electric, who owns the PVP, has abandoned their license to operate the project and are moving forward with decommissioning.