Thursday marks two years since the first hole opened up in the Oroville Dam Spillway, triggering an emergency that forced the evacuation of nearly 200,000 people. The crisis started on February 7, 2017. The California Department of Water Resources (DWR) had been releasing 60,000 cubic feet of water per second, when they noticed the concrete on the spillway began to disintegrate. That first day, the hole was 30 feet deep by 180 feet wide.