A resource for reliable information about significant people, places, events, and things in Minnesota history.
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April 30
| 1803 |
The Louisiana Purchase is signed, transferring to the United States territory that includes present-day Minnesota west of the Mississippi River. |
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| 1853 |
Troops from the U.S. Sixth Infantry begin constructing Fort Ridgely, having arrived from Fort Snelling on the steamer West Newton the previous evening. The fort is built near the Dakota reservation in the Minnesota River valley and would be a focal point during the U.S.-Dakota War of 1862. Secretary of War Jefferson Davis names the fort for three Ridgelys who were killed in the Mexican War. |
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| 1901 |
Charles Joy makes the first automobile ascent of St. Paul's Selby Hill, at a speed of eight to ten miles per hour. |
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| 1961 |
In his first home run for the Minnesota Twins baseball team, Harmon Killebrew hits the ball 467 feet. |
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| 1967 |
Nine tornadoes strike southern Minnesota, particularly the towns of Waseca, Owatonna, and Albert Lea, killing thirteen people. |
 Mabel Simis Ulrich was a public health educator, physician, author, and public figure whose pioneering work in sex education propelled her onto multiple public health commissions in Minneapolis. She contributed to the cultural scene in Minneapolis through a bookstore that she owned, and headed the Federal Writers’ Project (FWP) in Minnesota under the Works Progress Administration (WPA) in the 1930s. |
 Washburn A Mill was one of twenty-six Minneapolis flour mills that lined the Mississippi River below St. Anthony Falls during the city’s industrial heyday. By the early 1900s, its company (Washburn-Crosby) was the leading flour miller in Minnesota. The historic building has had five reincarnations in its more than 150 years: an original mill (1874–1878); a rebuilt second mill (1880–1924); a renovated mill (1924–1965); a warehouse (1965–1990); and a museum operated by the Minnesota Historical Society (2003–present). |
Made possible by the Arts and Cultural Heritage Fund through the vote of Minnesotans on November 4, 2008. Administered by the Minnesota Historical Society.
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