John Day Dam, Lake Umatilla, and associated facilities are operated for Hydropower, Navigation, Flood Risk Management, Fish & Wildlife, Recreation, Water Quality, and Irrigation. John Day Lock and Dam was authorized by Congress for power, navigation, and flood control in the 1950 Flood Control Act and amended in 1957. The project was completed in 1971 near the city of Rufus, Oregon, 215 miles upstream of the Pacific Ocean. Lake Umatilla extends upstream of the dam for 110 miles to McNary Dam.