The California Department of Water Resources is investigating "concrete erosion" on the Oroville Dam Spillway as officials cut back the water flow from Lake Oroville to the Feather River.
Someone spotted the problem about 10:00 a.m. on Tuesday, and that report led to DWR officials to severely cut back on water releases from 50-thousand cubic square feet to 5-thousand. DWR officials said there is no imminent danger to the dam.
Approximately 20 percent of Lake Oroville remains empty, and DWR officials say there is sufficient storage room to capture the inflow of the rain showers expected through the rest of the week. The reservoir, 3.5 million acre-feet at full capacity, now holds 2.8 million acre-feet, as prescribed by flood control operations.