Cole's Mill after cyclone, Rochester.

Cole's Mill after cyclone, Rochester.

Cole's Mill after cyclone, Rochester. Photographed by Elmer & Tenney, August 21, 1883. At Cole's Mill, eight cars of flour were overturned, the west end of the mill was blown in, machinery was blown about, and the roof was blown off.

Rochester Cyclone, 1883

A devastating cyclone hit Rochester on August 21, 1883. It killed dozens of people and injured many more, but emergency health services in the tornado's aftermath also led to the eventual creation of the Mayo Clinic.

MN90: Minnesota's Most Controversial Piece of Land

The one million acres of land and water bordering Minnesota and Canada called the Boundary Waters Canoe Area, or BWCA, began to be set aside for preservation purposes in 1902. MN90 producer Marisa Helms recounts some of its history.

MN90: A 19th Century Grasshopper Disaster

During the 1870s, grasshopper plagues made life miserable for Minnesota's farmers. The insects traveled in swarms so large they darkened the sky, destroying crops and farmers’ livelihoods along the way. Learn more about the government response to the crisis and the lasting damage that was left behind.

Grasshopper Plagues, 1873–1877

On June 12, 1873, farmers in southwestern Minnesota saw what looked like a snowstorm coming towards their fields from the west. What seemed to be snowflakes were in fact grasshoppers. In a matter of hours, knee-high fields of grass and wheat were eaten to the ground by hungry hoppers.

Interstate 94 construction at Dale Street and St. Anthony

Interstate 94 construction at Dale Street and St. Anthony

Interstate 94 construction at Dale Street and St. Anthony, c.1966. Construction of I-94 in St. Paul displaced African American residents.

Tailings delta, Silver Bay

Tailings delta, Silver Bay

The large delta created by taconite tailings at Silver Bay (seen here in 1963) led to the closing of the Reserve Mining Company's plant in 1980.

View of Hinckley main street the morning after the fire

View of Hinckley main street the morning after the fire

View of Hinckley's main street in 1894, the morning after a fire destroyed the town.

Duck hunters returning after hunting on Heron Lake

Duck hunters returning after hunting on Heron Lake

Duck hunters returning after hunting on Heron Lake, c.1887. Heron Lake, in southern Minnesota, attracted many market hunters by the turn of the twentieth century.

Falls of Saint Anthony

Falls of Saint Anthony

Falls of St. Anthony, c.1865. Photograph by Joel Emmons Whitney. Water power provided the energy for the saw and flour mills that put Minneapolis on the map.

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