The Oroville Dam's main spillway is flowing for the first time in more than two weeks.  Department of Water Resources officials say they're ramping-up the outflows to 50-thousand cubic-feet-per-second.  Work crews have cleared out more than one-point-two-million cubic yards of debris from the diversion pool at the base of the spillway since February 27th.  The release is expected to push up Feather River levels ten-to-15-feet, but no flooding is expected.