Those Green, Wet Spots On Oroville Dam Aren’t Worrisome, State Insists

State dam operators have issued a new report that refutes troubling allegations raised by a catastrophic engineering expert who contends Oroville Dam may be dangerously leaking. On Wednesday, the Department of Water Resources reiterated what state dam managers have insisted for months: that the public is in no risk from the persistent green wet spots near the top left abutment of the nearly 770-foot-tall earthen dam. The report says they’re nothing more than natural vegetation growth caused by rainfall that becomes “temporarily trapped” inside the dam’s outer-most layer and then seeps out.