Huge bags of boulders fill the overlook parking area at Oroville Dam on Tuesday, Feb. 14, 2017. Helicopters lifted the rocks and dropped them onto eroded areas of the emergency spillway .
Huge bags of boulders fill the overlook parking area at Oroville Dam on Tuesday, Feb. 14, 2017. Helicopters lifted the rocks and dropped them onto eroded areas of the emergency spillway . Randall Benton rbenton@sacbee.com
Huge bags of boulders fill the overlook parking area at Oroville Dam on Tuesday, Feb. 14, 2017. Helicopters lifted the rocks and dropped them onto eroded areas of the emergency spillway . Randall Benton rbenton@sacbee.com