2019 major anthropogenic physical disturbance Columbia River: rehabilitation of South Jetty commenced Read More 26 JUN 0
2018 major anthropogenic physical disturbance Columbia River: rehabilitation of North Jetty commenced Read More 26 JUN 0
2017 major anthropogenic physical disturbance Columbia River: rehabilitation of Jetty A completed Read More 26 JUN 0
2000 major anthropogenic physical disturbance Columbia River: 2000s–main channel deepened to 13 meters Read More 26 JUN 0
1984 major anthropogenic physical disturbance Columbia River: Revelstoke dam (152 meters high) completed Read More 26 JUN 0
1973 major anthropogenic physical disturbance Columbia River: Mica dam (243 meters high) completed Read More 26 JUN 0
1971 major anthropogenic physical disturbance Columbia River: John Day dam completed Read More 26 JUN 0
1970 major anthropogenic physical disturbance Columbia River: main channel deepened to 12 meters Read More 26 JUN 0
1969 major anthropogenic physical disturbance Columbia River: 56 more pile dikes completed Read More 26 JUN 0
1957 major anthropogenic physical disturbance Columbia River: The Dalles dam completed Read More 26 JUN 0
1954 major anthropogenic physical disturbance Columbia River: McNary dam completed Read More 26 JUN 0
1942 Major anthropogenic physical disturbances North Jetty Grays Harbor reconstructed. Columbia River: Grand Coulee dam (168 meters high) completed. Read More 23 APR 0
1939 major anthropogenic physical disturbance Columbia River: North Jetty rehabilitation completed; Jetty A completed to a length of 1.6 kilometers Read More 26 JUN 0
1937 major anthropogenic physical disturbance Columbia River: Bonneville dam completed Read More 26 JUN 0