In December 1901, botanist Alexander Pierce Anderson created puffed rice while experimenting with starch crystals in his laboratory. Although he did not yet realize the significance of his discovery, Anderson's new breakfast food would make him a nationally known figure and the face of a Quaker Oats advertising campaign for almost a decade.

Before burning to the ground in 2011, the Swany White Flour Mill was the last remaining nineteenth-century mill in use in Minnesota. Located in Freeport, the mill produced white flour, mixes, and other grain products for more than a century. It was a local landmark and was a frequent stop for people interested in the history of milling and bread baking.

Between 1913 and 1914 the Coon Rapids hydroelectric dam was constructed with the intent to provide power to Anoka County. The dam was shut down in 1966 after becoming too expensive to operate. It later became part of Minnesota’s environmental control program.