After a massive construction effort, the main flood control spillway at Oroville Dam is up and running in time for the rainy season and on point for its Nov. 1 target for repair, officials with the California Department of Water Resources announced today. DWR set Nov. 1 as its goal for repairing and reconstructing more than 2,270 feet of the 3,000-foot-long main, gated flood control spillway at Lake Oroville so it could handle flows of 100,000 cubic-feet per second this winter.