Outside consultants agree with the state’s plan to spend the next two summers replacing sections of Oroville Dam’s still largely intact upper spillway rather than trying to tear it all out in one season. But the public can’t see the recommendations the independent board of consultants gave the Department of Water Resources to ensure the work is safe and sound. In a 16-page report made public late Wednesday, the engineering consultants concur with DWR’s plan to leave the dam’s upper spillway mostly untouched this summer while focusing efforts on the heavily damaged lower spillway.