A coalition of California environmental groups is calling on the California Department of Water Resources to build a complete, functional emergency spillway at Oroville Dam as part of a sweeping program to improve dam safety and flood control practices across the state and beyond. The conservation coalition — including Friends of the River, the California Sports Fishing Alliance, the South Yuba River Citizens League and American Whitewater — released a 53-page report seeking to apply lessons learned from February’s Oroville spillway crisis.