OROVILLE, Calif. (AP) — California water authorities will stop the outflow from the Oroville Dam's crippled spillway to allow workers to remove debris blocking a hydroelectric plant from working, officials said Sunday. The Department of Water Resources said it will start gradually reducing outflows from the Northern California dam beginning Monday morning and completely halt them by the afternoon. The outflow from behind the 770-foot-tall dam will be stopped for several days to allow workers to clear concrete, silt and other debris from a pool at the bottom of the spillway.