Maybe they need to build an upstream dam to act as a capacitor for inflow regulation to Oroville (as the water storage facility).
Where’s the poll asking California citizens / occupiers whether they would rather have water or a high speed train?
No place to build an upstream dam but there are two downstream facilities that do the same thing. One is the Thermalito Afterbay and the other is Don Pedro Dam. Oroville serves as the upstream capacitor for the lower dams.