1. In 1851, the Treaty of Traverse des Sioux was signed, ceding a large portion of southern Minnesota to the United States government and setting the stage for the eventual removal of the Dakota people from their ancestral lands.
2. On August 30, 1876, the Saint Paul and Pacific Railroad opened a new bridge over the Mississippi River in downtown Minneapolis, greatly improving transportation and commerce in the area.
3. In 1939, the Minnesota State Fair set an attendance record of 251,684 visitors on August 30, despite hot and humid weather conditions.
4. On August 30, 1967, the University of Minnesota's Institute of Technology dedicated its new $10 million engineering building, named in honor of former Dean George T. Weaver.
5. In 1998, the city of Duluth experienced a rare tornado outbreak on August 30, with three separate tornadoes touching down and causing extensive damage in some areas.