Missouri River Division |
North Pacific Division |
| 1907 - Kansas City District formed | 1871 - Portland Engineers Office opens (later becomes Portland District) |
| 1933 - Missouri River Division established: headquaters in Kansas City, MO | 1896 - Seattle District formed |
| 1901 - Division formed: headquarters in San Francisco, CA | |
| 1934 - Omaha District formed | 1918 - Columbia River 300-foot-wide, 30-foot-deep navigation channel opens |
| 1939 - Kanopolis Dam started | 1931 - North Pacific Division merges into Pacific Division |
| 1940 - Construction completed on Fort Peck Dam | 1938 - First multipurpose project on Columbia River opens at Bonneville Dam |
| 1942 - Division offices move to Omaha, NE | 1940 - Division begins WWII support |
| 1943 - Construction starts on nine VA hospitals | 1941 - First of Willamette River projects opens at Fern Ridge |
| 1944 - Flood Control Act authorizes Pick Sloan Plan | 1943 - ALCAN Highway completed |
| 1945 - Rivers and Harbors Act authorizes nine-foot navigation channel | 1946 - Alaska District established; North Pacific Division returns to Portland |
| 1948 - First Missouri River agriculture levee started | 1948 - Walla Walla District created |
| 1952 - Construction completed on Harlan County Dam | 1953 - McNary Dam put in service |
| 1953 - MRD creates Reservoir Control Center | 1955 - Albeni Falls and Chief Joseph dams become operational |
| 1953 - Ft. Randall Dam becomes operational | 1957 - The Dalles Dam replaces the Dalles-Celilo canal |
| 1955 - Construction completed on Garrison Dam | 1961 - Columbia River Treaty with Canada signed; Ice Harbor Dam opens |
| 1955 - Construction started on Air Force Academy in Colorado Springs | 1964 - Alaska Earthquake recovery |
| 1955 - Gavin's Point Dam becomes operational | 1968 - John Day and Lower Monumental dams begin operations |
| 1956 - Planning starts on NORAD headquarters | 1970 - Little Goose Dam completed |
| 1959 - Construction completed on Tuttle Creek Dam | 1974 - Dworshak Dam put in service |
| 1960 - MRD Reservoir Control publishes first Missouri River Master Water Control Manual | 1975 - Lower Granite and Libby dams put in service |
| 1962 - Oahe Dam dedicated by President John F. Kennedy | 1977 - First of Rogue River projects opens at Lost Creek |
| 1964 - Construction completed on Big Bend Dam | 1981 - Chief Joseph Dam adds 11 generators |
| 1967 - Missouri River main stem system fills to desired levels for the first time | 1983 - Essayons joins the dredge fleet; Bonneville Dam's second powerhouse comes on line |
| 1982 - MRD designated Hazardous Toxic and Radioactive Waste National Design Center | 1985 - Construction begins on Elk Creek Lake |
| 1986 - Contract awarded for Madigan Army Medical Center | |
| 1990 - MRD designs and constructs Army Engineers School at Fort Leonard Wood, MO | 1989 - NPD assists with Valdez oil spill cleanup |
| 1993 - Bonnevill Dam's second navigation lock opens | |
| 1993 - MRD personnel battle flooding that kills 47 people, damages 20 million acres and causes $11 billion in damages in nine Midwestern states. | 1996 - NPD battles Great NW Flood |
| 1997 - Division's Lab closes | |
| 1997 - MRD and NPD become Northwestern Division | 1997 - NPD merges with MRD to form Northwestern Division |
